Performance requirements for hoses used in turbocharging systems

Turbocharging is a technology that uses the exhaust gases produced by an internal combustion engine to drive an air compressor. The primary function of turbocharging in cars is to increase the volume of air entering the engine, thereby boosting engine power and torque and making the vehicle more responsive. However, following turbocharging, both the pressure and temperature within the engine rise significantly; consequently, advancements in materials are also crucial when implementing turbocharging technology in engines.

High-temperature resistance

The gas in a turbocharger generates high temperatures due to compression and intense friction; even after cooling, the gas temperature generally exceeds 100 °C. Consequently, the materials used for hoses in turbocharger systems must be capable of withstanding high temperatures. Ordinary natural rubber, styrene-butadiene rubber (SBR) and polybutadiene rubber (BR) are unable to meet the requirements for use under high-temperature conditions; therefore, specialised high-temperature-resistant rubber materials must be employed. As turbocharger pressures continue to rise, the temperature of the gas passing through the hoses also increases. If the pressure reaches 3.5×10⁵ Pa, the temperature of the gas passing through the hoses can exceed 250 °C, and there are very few types of rubber capable of withstanding such high temperatures.

Oil Resistance

The gas passing through the hoses in a turbocharging system is generally contaminated with oil vapour; therefore, the hoses must possess a certain degree of oil resistance, particularly resistance to high-temperature oil vapour. Some rubbers with good high-temperature resistance (such as silicone rubber) have poor oil resistance, so an inner lining must be added to the inner wall of the silicone rubber hose to prevent corrosion from the oil vapour.

Strength

Turbocharging systems are not only subject to high temperatures but also to a certain degree of pressure; in particular, the pressure on the high-temperature sections of the piping is relatively high. Although reinforced hoses are generally used in turbocharging systems (with the reinforced layer constituting the primary pressure-bearing component), the rubber itself must also possess a certain degree of strength to enhance the overall strength of the hose. Furthermore, to meet the requirements of the manufacturing process and assembly, the rubber must also exhibit high tensile strength and tear strength.

Compression set

Generally, turbocharger hoses are connected to metal pipes using clamps to form a piping system. At high temperatures, the rubber must possess good resistance to deformation; otherwise, excessive compression set may cause the clamps to loosen and the hose to detach, leading to a safety incident.

Cold resistance

Although the hoses operate in a high-temperature environment once the engine has started, they are exposed to cold air once the engine is switched off. When the engine is started in cold conditions during winter in cold regions, the rubber hoses vibrate at low temperatures. If the rubber has poor low-temperature resistance, the hoses may become hard and brittle, leading to problems such as tearing, detachment and loss of vibration-damping capability.

Adhesion Strength

The rubber layer of a hose must maintain good adhesion to the reinforcement layer and the inner lining under harsh conditions such as cold, heat, and exposure to oil and gas, and must possess sufficient adhesion strength to ensure that delamination does not occur. Adhesion strength is dependent on the properties of the rubber itself and the rubber formulation, and is also closely related to the impregnation and pre-treatment of the reinforcement layer, the choice of adhesive, and the bonding process; therefore, all these factors must be thoroughly considered.

Hardness

The rubber should have a suitable hardness. If the hardness is too high, the hose will be too rigid to provide effective vibration damping, and will be difficult to fit and prone to coming loose; if the hardness is too low, sufficient strength cannot be guaranteed.

The Evolution of Automotive Turbocharger Hoses

Have you noticed that some vehicles on the road have a 'T' following the engine displacement figure in their model designation? This actually indicates that the vehicle's engine is fitted with a turbocharger. This device increases engine output power during high-speed driving whilst offering relative fuel efficiency.

The intake and exhaust intercooling system for automotive engines equipped with turbochargers typically comprises an air filter, turbocharger, intercooler, and connecting ductwork. The air delivery ducts must employ rubber hoses connected to steel pipes, or rubber hoses connected to blow-moulded pipes, or directly to corrugated blow-moulded pipes. The excellent flexibility and vibration-damping properties of rubber or corrugated blow-moulded pipes facilitate duct layout and assembly while significantly enhancing the air delivery system's capacity to absorb vibrations. Fresh air, after filtration through the air cleaner and pressurisation by the turbocharger, undergoes significant temperature rise during compression. Typically reaching 150°C to 200°C, gas temperatures in high-boost-ratio engines may exceed 200°C, even surpassing 275°C. Following cooling through the intercooler, the gas medium temperature drops below 60°C. This increases the density of the fresh air, enabling the engine to draw in greater volumes of air and inject more fuel. This promotes more complete combustion, thereby reducing fuel consumption and emissions while enhancing engine power output.

Turbocharger hoses, serving as the conduit between the engine and turbocharger, must withstand the swelling and ageing caused by high-temperature oil vapour during both the intercooler intake and exhaust processes, while maintaining flexibility at low temperatures. Given that turbochargers frequently operate under high-speed, high-temperature conditions—with exhaust turbine temperatures reaching approximately 600°C and rotor speeds of 8000–11000 rpm—all layers (inner, reinforcement, and outer) must exhibit resistance to high-temperature ageing. Consequently, inner layers typically employ ACM, VMQ, FKM, AEM, or EPDM compounds, while outer layers utilise ACM, VMQ, FKM, AEM, ABS (GDM), or similar materials. The reinforcement layer incorporates polyester or aromatic polyamide materials. These rubber compounds, capable of withstanding demanding operating conditions, are costly and relatively challenging to process. Consequently, developing an appropriate formulation system to achieve the desired performance while reducing costs to some extent represents a key challenge for turbocharger hose manufacturers and developers.

THERMAX N990 medium-particle pyrolytic carbon black is produced through the thermal cracking of natural gas. This pyrolysis process endows the carbon black with distinctive characteristics of large particle size and low structure. THERMAX N990 finds widespread application due to its ability to impart heat resistance, oil resistance, chemical resistance, and excellent dynamic properties to products. Its large particle size and low structure confer high fillability. Characteristics such as low compression set, high rebound elasticity, and low hysteresis enable the compound to retain the inherent elastomeric properties of rubber. As a non-reinforcing carbon black, the use of THERMAX pyrolytic carbon black in compounds is frequently employed to achieve cost reduction and obtain specific physical properties.

The use of THERMAX N990 in rubber compounds such as FKM and ACM/AEM demonstrates a superior overall balance of processing and product performance compared to any other carbon black variety. These favourable properties remain stable across varying filler levels and hardness requirements, outperforming other carbon blacks in product applications. THERMAX N990 serves as a cost-effective filler in FKM, ACM/AEM and similar rubber applications, particularly under high-filling conditions. High filling reduces polymer content in the compound, thereby lowering costs. Simultaneously, the inclusion of THERMAX N990 enhances the compound's resistance to oil and gas ageing, as well as high-temperature ageing. It also facilitates easier mixing and extrusion processes. It effectively addresses adhesion issues between inner/outer rubber layers and reinforcement layers. During high-pulse gas vibrations within the hose, it maintains excellent dynamic performance, thereby ensuring the longevity of the entire turbocharger system assembly.

THERMAX N990 Carbon Black ensures sustained power for your vehicle during high-speed driving.

The new debuts at the Paris Motor Show, priced from €34,200

Audi will unveil the facelifted A6 (available as a saloon and estate) at the Paris Motor Show this October, alongside the all-new high-performance RS6 variant. The updated models feature more fuel-efficient engines, retuned suspension systems, newly developed safety equipment, and the latest generation MMI multimedia interface.

The signature Audi grille receives subtle refinement, while enlarged side air intakes lend the front end a more assertive and dynamic stance. The redesigned fog lights reflect contemporary styling cues. Customers may opt for xenon headlights with LED daytime running lights, with higher trims offering adaptive headlight technology that automatically adjusts illumination angles during cornering. Additionally, the optional SmartBeam high-beam assist system from Gentex is available. This system autonomously evaluates surrounding traffic conditions to switch between high and low beams, ensuring optimal illumination. By eliminating the need for manual high-beam switching, drivers can maintain greater focus on the road ahead.

The new Audi A6 measures 4.93 metres in length, 1.86 metres in width and 1.46 metres in height, with only minor alterations to the body dimensions following revisions to the front and rear bumpers. Subtle refinements have been made to the side skirts, featuring a diffuser-like mesh between the twin exhaust pipes flanking the rear. The boot lid has been completely redesigned, with its opening transformed from a trapezoidal to a rectangular shape. The newly designed LED tail lights are more elongated, creating an even more dynamic atmosphere than the A5. Audi offers five body colours for the new A6.

Interior modifications are more restrained than exterior changes, featuring subtle dashboard refinements and additional chrome accents. Valcona leather seats are available as optional equipment. The performance-focused S-line variant features 18-inch alloy wheels and a 30mm reduction in minimum ground clearance to lower the centre of gravity. All models benefit from Audi’s newly tuned suspension system for the A6.

The most significant changes to the Audi A6 undoubtedly lie in its new powertrain. Engine engineers have reduced fuel consumption without compromising power, achieving an average fuel efficiency improvement of up to 15% across the entire range. The adoption of a new electronically controlled hydraulic power steering system has enhanced aerodynamic performance, while the addition of variable valve lift technology to the engine and an improved intake camshaft variable valve timing system further optimise torque delivery.

The entry-level petrol engine for the new Audi A6 remains the 2.0-litre inline four-cylinder TFSI turbocharged unit, delivering a peak output of 170 hp. The top-of-the-range specification features a 4.2-litre V8 FSI producing 350 hp. Additionally available are a 2.8-litre V6 FSI delivering 190 hp and 220 hp respectively, alongside a newly developed 3.0-litre V6 TFSI turbocharged direct injection engine producing 290 hp. The new engines come standard with Tiptronic automatic transmission and Quattro permanent all-wheel drive. Acceleration from 0 to 100 km/h takes just 5.9 seconds, with electronic speed limitation at 250 km/h. Combined fuel consumption is a modest 9.5 litres per 100 kilometres.

The entry-level diesel engine is a 2.0-litre TDI producing 136 hp, alongside a differently tuned 170 hp variant. Next comes the more potent 2.7-litre V6, delivering a maximum output of 190 hp and 380 Nm. The top-of-the-range specification features a 3.0-litre V6 TDI, achieving peak figures of 240 hp and 450 Nm. Notably, the 2.0-litre TDI achieves a combined fuel consumption of just 5.3 litres per 100 kilometres – a commendable figure in today's climate of high fuel prices. Engines delivering 190 hp or more may be equipped with Audi's Quattro permanent all-wheel drive system.

Following its global debut at the Paris Motor Show in October, the new Audi A6 commenced sales across European markets. The entry-level variant, equipped with the 2.0-litre TFSI engine, carries an estimated price tag of €34,200 (approximately RMB 350,000). It is anticipated that the domestic A6L will undergo a corresponding facelift, though the timing remains unconfirmed.

Turbocharger Oil Feed Pipe Manufacturing Process Explained

Modern turbocharged engines rely heavily on stable lubrication and oil circulation to maintain performance and durability. One small but critical component in this system is the Turbocharger Oil Feed Pipe. Although it may appear simple, the manufacturing quality of this pipe directly affects turbocharger lifespan, oil flow stability, sealing performance, and overall engine reliability.

For European aftermarket customers and OEM buyers, understanding how a Turbocharger Oil Feed Pipe is manufactured helps evaluate product quality, material standards, and supplier capability.

This article explains the complete Turbocharger Oil Feed Pipe manufacturing process, including raw materials, bending, welding, testing, and quality control procedures.

What Is a Turbocharger Oil Feed Pipe?

A Turbocharger Oil Feed Pipe is responsible for delivering pressurized engine oil from the engine block to the turbocharger bearing housing. The oil lubricates and cools the turbocharger shaft and bearings during high-speed operation.

Without proper oil supply:

Turbocharger bearings may overheat
Shaft wear may increase
Turbo efficiency may decrease
Oil leakage or turbo failure may occur

The Turbocharger Oil Feed Pipe must therefore withstand:

High temperature
High pressure
Continuous vibration
Long-term oil exposure

In European vehicles such as BMW, Mercedes-Benz, Volkswagen, Renault, and Volvo, the oil feed pipe design often requires precise bending angles and accurate OE fitment.

Raw Materials Used in Turbocharger Oil Feed Pipes

The durability of a Turbocharger Oil Feed Pipe begins with material selection.

Carbon Steel Pipes

Carbon steel is widely used in aftermarket turbocharger oil pipes because of its:

Good strength
Cost efficiency
Stable production performance

After bending and forming, carbon steel pipes usually receive surface treatment such as galvanizing or anti-corrosion coating.

However, poor drying after chemical treatment may sometimes cause internal oxidation or slight rust inside the pipe.

Stainless Steel Pipes

Stainless steel Turbocharger Oil Feed Pipes provide:

Better corrosion resistance
Longer service life
Improved appearance
Higher temperature resistance

Many European aftermarket customers now prefer stainless steel solutions for demanding applications or harsh environments.

Although stainless steel pipes have higher production costs, they significantly reduce the risk of internal corrosion.

Rubber Hose and Sealing Materials

Some turbo oil pipe assemblies include flexible hose sections and sealing components.

Common sealing materials include:

NBR (Nitrile Rubber)
FKM / Viton® for higher temperature resistance

Material selection depends on:

Oil temperature
Pressure requirements
Vehicle application
OE specifications

Turbocharger Oil Feed Pipe Manufacturing Process

The Turbocharger Oil Feed Pipe manufacturing process involves multiple precision production steps.

1. Tube Cutting

The process begins with raw steel tubing.

The tubes are cut according to OE dimensions using automatic cutting machines to ensure:

Accurate length
Clean edges
Stable production consistency

Cutting accuracy is important because even small deviations may affect installation and oil sealing.

2. CNC Tube Bending

After cutting, the pipe enters the CNC bending process.

Turbocharger Oil Feed Pipes often have complex shapes because they must fit inside crowded engine compartments while avoiding:

Engine vibration interference
Heat sources
Other engine components

Precise bending ensures:

Correct oil flow path
Proper installation angle
OE-level fitment

Advanced CNC bending machines help maintain dimensional consistency during mass production.

3. Welding and Joint Assembly

Many Turbocharger Oil Feed Pipes require:

End fittings
Connectors
Brackets
Banjo joints

These components are welded or brazed onto the pipe assembly.

Welding quality is extremely important because poor welding may lead to:

Oil leakage
Cracks
Pressure failure

Professional manufacturers usually control:

Welding temperature
Joint penetration
Surface cleanliness
Welding consistency

4. Cleaning and Internal Treatment

After welding, internal cleaning becomes critical.

Metal debris, welding residue, or chemical contamination inside the pipe may damage the turbocharger.

The cleaning process may include:

High-pressure flushing
Air cleaning
Ultrasonic cleaning
Internal drying

Some manufacturers also apply anti-rust oil protection inside the pipe to reduce oxidation risk during storage and transportation.

This step is especially important for carbon steel Turbocharger Oil Feed Pipes.

5. Surface Treatment

To improve corrosion resistance and appearance, the pipe surface usually receives treatment such as:

Zinc plating
Electroplating
Galvanizing
Anti-corrosion coating

Good surface finishing improves:

Rust resistance
Product appearance
Long-term durability

European aftermarket customers often pay close attention to surface consistency and coating quality.

Pressure Testing and Quality Inspection

Reliable Turbocharger Oil Feed Pipe manufacturers perform strict quality testing before shipment.

Leakage Testing

Each pipe assembly may undergo air or oil leakage testing to ensure:

No pinholes
No sealing failure
Stable pressure resistance

Leakage testing is one of the most important quality control procedures.

Burst Pressure Testing

Burst testing verifies the pipe’s maximum pressure capability.

High-quality Turbocharger Oil Feed Pipes must withstand pressures far above actual operating conditions to ensure safety and durability.

Dimensional Inspection

Manufacturers also check:

Pipe angle
Connector position
Thread accuracy
Installation dimensions

Optical measuring systems and custom fixtures are often used for OE verification.

Common Problems in Turbocharger Oil Feed Pipes

Understanding common failure modes helps improve product reliability.

Inner Corrosion

Internal corrosion is one of the most common aftermarket concerns.

Possible causes include:

Residual moisture after galvanizing
Poor drying process
Long-term storage conditions

Complex pipe bending structures sometimes make internal drying more difficult.

To reduce this risk, manufacturers may:

Improve drying procedures
Apply anti-rust oil
Use stainless steel materials

Oil Leakage

Oil leakage may result from:

Poor sealing
Improper welding
Incorrect assembly
Low-quality fittings

Even minor leakage may eventually affect turbocharger performance.

Oil Flow Restriction

If the inner diameter becomes restricted, oil supply to the turbocharger may decrease.

Possible causes include:

Internal contamination
Pipe deformation
Incorrect bending
Excessive welding residue

Stable oil flow is essential for turbocharger cooling and lubrication.

How Manufacturers Improve Turbocharger Oil Pipe Reliability

Professional Turbocharger Oil Feed Pipe manufacturers continuously improve production processes.

Common improvement measures include:

Better internal cleaning systems
Improved anti-rust protection
Higher quality welding control
Upgraded surface finishing
More accurate CNC bending
Enhanced pressure testing standards

For European aftermarket customers, these improvements help reduce:

Warranty claims
Oil leakage issues
Installation problems
Long-term durability risks

How to Choose a Reliable Turbocharger Oil Pipe Manufacturer

When selecting a Turbocharger Oil Feed Pipe supplier, buyers should evaluate more than price alone.

Important factors include:

OE Development Capability

A reliable supplier should support:

OE sample development
Drawing-based production
Vehicle application matching
Small batch customization

Quality Control System

Professional manufacturers should provide:

Leakage testing
Burst pressure testing
Dimensional inspection
Material verification

IATF 16949 certification is also an important advantage for automotive suppliers.

European Aftermarket Experience

Suppliers familiar with European vehicles generally understand:

OE fitment requirements
Surface quality expectations
Packaging standards
Long-term aftermarket durability

Conclusion

The Turbocharger Oil Feed Pipe may be a relatively small component, but its manufacturing quality plays a major role in turbocharger reliability and engine performance.

From raw material selection and CNC bending to welding, cleaning, and pressure testing, every production step affects the final product quality.

For aftermarket buyers and OEM customers, choosing a professional Turbocharger Oil Feed Pipe manufacturer with strong quality control and technical capability is essential for long-term reliability.

If you are looking for reliable aftermarket Turbocharger Oil Feed Pipe solutions for European vehicles, working with an experienced manufacturer can help ensure stable quality, OE fitment, and long-term cooperation.

Use and Maintenance of Automotive Air Conditioning Systems

Summer is just around the corner. As we all know, a good car air-conditioning system can cool the car down quickly and ensure a comfortable drive, but we often don’t really know how to use the air-con properly or how to maintain and look after the system. We often find ourselves in this situation: when we switch on the car’s air conditioning in sweltering, blazing heat, we discover that the system is malfunctioning, which can be quite a worry. To address these issues, we’ll provide a detailed guide on the correct use of your car’s air conditioning system and the key points to bear in mind during its maintenance and upkeep.

Turning on a car’s air conditioning system may seem like a straightforward task, but in reality, it is easy to overlook the correct methods and precautions. Whilst we do not need to fully understand how the entire system works or its complete structure, it is essential to know the correct way to use it and how to maintain it properly. Understanding these points not only improves the efficiency and durability of your car’s air conditioning but also ensures the system remains in good working order, as its condition directly affects our health.

AC Hose

Turn on the car air conditioning regularly

Firstly, the cool air blown out of the car’s vents passes through the blower fan, the evaporator in the air-conditioning system, the small reservoir in the heating system, and the air ducts. Over time, these systems accumulate significant amounts of dust and moisture; if not used or maintained properly, this can lead to mould growth and encourage the proliferation of bacteria, the harm to our health being self-evident.

When using the car’s air conditioning system for the first time after a change of season, you should open the car doors, switch to the external air circulation mode and set the fan to high. You should then step out of the vehicle, leave the system running for at least two minutes, switch it off, and clean the seats and carpets inside the car. This is done to expel as much bacteria and dirt as possible from the air conditioning system, which has been left unused for a long period, thereby preventing any adverse effects on the quality of the air inside the vehicle and reducing potential harm to the driver and passengers.

During other seasons when the air conditioning is not required for cooling, you should still switch it on at least once a month. Leave it running for just 30 seconds before switching it off. This ensures that the compressor and all the pipes remain well-lubricated, prevents leaks and the deterioration of hoses, and enhances the durability of the air conditioning system.

In direct sunlight, let the air heat up first before switching to cooling

When a car is left parked in direct sunlight, the temperature inside can reach 50°C or even higher. This makes getting into the car a real ordeal for the driver. Even with the air conditioning switched on, it is difficult to bring the temperature down quickly enough. At best, one might feel a slight coolness from the vents, whilst the seat and backrest remain unbearably hot.

In fact, before getting into the car, open all the windows or doors to let the hot air out. Switch on the fan and the fresh air mode (without turning on the cooling function just yet) to speed up air circulation and quickly dispel the heat from inside the car. Only then should you get in, close the windows and doors, and switch on the cooling function. Doing this will naturally improve the cooling performance and efficiency of the air conditioning.

Avoid leaving it switched on for long periods

Some motorists, for the sake of convenience, leave the air conditioning running continuously during the summer. However, when a vehicle is cold-started, neither the lubrication provided by the engine oil nor the operating temperature of the cylinders is at an optimal level. Under these conditions, the load on the engine and the resulting wear are the most severe of all operating conditions. Furthermore, running the air conditioning compressor and blower fan simultaneously increases the load on both the engine and the electrical system, causing unnecessary wear to the engine whilst also resulting in suboptimal cooling performance. Therefore, the air conditioning system should be switched off when starting the vehicle.

However, during the cooling process, car air conditioning systems accumulate a significant amount of moisture inside. If the engine is switched off immediately, this trapped moisture cannot be expelled quickly enough; over time, this leads to mould forming inside the air conditioning ducts, thereby fostering the growth of bacteria that are harmful to our health. If you notice a sour, musty odour whilst using the air conditioning, this is typically the result of prolonged improper use. To address this issue, three minutes before reaching your destination, switch off the cooling function and set the system to fresh air mode. This allows as much moisture as possible to be expelled from the system, thereby reducing the likelihood of mould growth inside the unit.

AC Pipe

The operating time should not be too long

Many drivers set their air conditioning to the lowest temperature and leave it on for long periods to combat the sweltering heat of summer. However, this is actually very detrimental to one’s health. Due to the significant temperature difference between the inside and outside of the vehicle, excessively low temperatures inside the car can easily cause passengers who have just stepped in from a hot environment to develop heat-related colds or flu-like symptoms. Furthermore, prolonged exposure to a cold air-conditioned environment increases the risk of developing ‘air-conditioning sickness’. For air conditioning systems with automatic climate control, we recommend setting the temperature between 22°C and 26°C.

Finally, it is crucial to note that many drivers often leave their cars parked in garages with the air conditioning running whilst they rest. This practice carries a high risk of carbon monoxide poisoning. In enclosed spaces, carbon monoxide from vehicle exhaust fumes accumulates and is drawn into the cabin through the air conditioning system’s air intake, causing carbon monoxide levels to rise. This can lead to poisoning and, in severe cases, even death. Therefore, when a vehicle is in a relatively enclosed environment, the air conditioning should be switched off and the engine turned off.

When using the high-pressure air condition hose in recirculation mode for extended periods whilst parked outdoors, the lack of air circulation causes the air inside the vehicle to become stale. Driving for long periods in such an environment can lead to dizziness and a foggy head, which may affect the health of both the driver and passengers. It is therefore not advisable to use the recirculation mode with the windows closed for long periods. During long journeys, you should switch to fresh air mode frequently and stop to rest at appropriate intervals to alleviate fatigue. Furthermore, in older vehicle models with poor heat dissipation, leaving the air conditioning running for an extended period after parking may cause the coolant temperature to rise excessively, which in severe cases could result in engine damage.

What are automotive bushings? What is their function?

If you hear a ‘creaking’ noise coming from the car’s chassis, accompanied by the steering wheel pulling to one side whilst driving, it could be a problem with the suspension bushings. Today, we’ll take a look at what you need to know about car bushings.

What is an automotive bushing?

In mechanical design, the connection of moving parts is a common requirement; however, relative motion between components can easily lead to friction and wear. To address this issue, flexible coupling solutions are widely adopted—not only do they effectively reduce wear, but they also make replacement more convenient and cost-effective should wear and damage occur later on. It is for this reason that industrial bushings have come into being.

In the automotive sector, bushings are elastic, flexible connecting components installed at the joints of moving parts such as the chassis suspension system and control arms. They are typically made from elastic materials such as rubber or polyurethane (or a composite structure combining a metal skeleton with an elastic material), and their core function is to replace rigid connections, thereby resolving the issue of friction and wear caused by the relative movement of components.

Put simply, they act as a ‘shock absorber and wear-resistant joint’ between chassis components.

What is the purpose of a bushing?

Chassis bushings play a crucial role in the construction of a vehicle’s chassis. Their primary function is to connect the chassis to the suspension system, preventing rigid connections, protecting metal components and absorbing shocks, thereby ensuring the vehicle’s stability and comfort whilst in motion. Chassis bushings must not only bear the vehicle’s weight and inertia but also cope with a variety of complex road conditions and driving scenarios. A high-performance chassis bushing can significantly enhance the vehicle’s ride quality, reduce tyre wear and suspension fatigue, and provide the driver with a more enjoyable driving experience.

Chassis bushings can be categorised into various types based on different classification criteria: these include front and rear axle bushings, tie rod bushings, control arm bushings, subframe bushings, hydraulic and non-hydraulic bushings, as well as metal and nylon bushings, and open and closed bushings. Although the classifications vary, the functions they perform are similar.

Bushing

Points to note when replacing bushings

1. Selection of press-fit sleeves

When removing or pressing in components, select a sleeve of the appropriate size to ensure that the force is applied to the outer ring of the bushing, whilst other parts remain unloaded. Wear safety goggles and gloves when carrying out this work. The dimensional information provided in the Codic product manual can assist in selecting the correct sleeve.

2. Press-fit Force

To facilitate installation, remove any burrs from the inner bore prior to pressing and apply a small amount of lubricant (such as 4240 grease) to the inner bore and the initial section of the outer diameter. Ensure that the press-fit force is not too low; for bushings with an outer tube diameter of 40 mm, the press-fit force for metal outer tubes should generally exceed 6 kN, and for nylon outer tubes, it should exceed 20 kN, with values varying according to the diameter of the outer tube. If the pressing force is found to be too high or too low, check the condition of the inner bore and verify that the correct bushing has been selected.

3. Confirmation of Installation Position
During installation, ensure that the solid section is aligned with the horizontal direction of travel. If the product features an arrow, ensure that the arrow points in the horizontal direction of travel. Ensure that the pressing position is centred, with equal lengths protruding from both ends.

4. Stress Relief
Once installation is complete whilst the vehicle is raised off the ground, stress concentrations often develop in the chassis system. To resolve this, the vehicle must be lowered to the ground and the steering wheel centred. The fasteners should then be loosened to the specified torque, before being retightened to the standard torque to release the stress and allow the chassis to return to its original state. At this point, the vehicle is as though fitted with a brand-new pair of running shoes, ready to roam freely.

Contact Us for Vehicle-Specific Bushings: natasha@nafurancar.com

What routine tests are carried out on automotive air conditioning hoses?

Automotive air conditioning refrigerant hoses are the core flexible fluid-transfer components within the vehicle’s air conditioning refrigeration circuit. Specifically, they refer to specialised hose assemblies manufactured using a multi-layer composite structure, designed to transfer refrigerant and associated refrigeration oil in a sealed manner between key components of the vehicle’s air conditioning system—such as the compressor, condenser, expansion valve and evaporator—whilst being capable of withstanding the demands of vehicle operation.

What are the main tests that are routinely carried out?

Joint pull-off strength test

Definition: A test to determine the connection strength between a hose and a coupling, and to assess whether the coupling will pull out of the hose under axial tensile force.

Principle: Axial tensile force is applied to the hose assembly at a rate of 25 mm/min ± 2 mm/min; the load value at the point of separation is recorded to verify the mechanical reliability of the connection.

Burst pressure test

Definition: A destructive test in which pressure is applied at a constant rate within a specified time frame until the hose ruptures, in order to determine its maximum pressure rating.

Principle: By applying pressure to a liquid, this test simulates the instantaneous high pressures that a hose may be subjected to under extreme operating conditions (such as system blockages or compressor malfunctions), thereby verifying the safety of the material strength and structural design.

Dielectric strength test

Definition: A test to assess the hose’s sealing performance and structural stability under long-term operating pressure, involving maintaining a pressure of 50% of the burst pressure for 2 minutes.

Principle: By subjecting the hose to sustained pressure, the test detects any minor leaks or structural deformation, thereby verifying its long-term reliability under normal operating pressure.

High-temperature resistance test

Definition: A test to evaluate the thermal stability and sealing performance of materials at high temperatures by placing hoses in a constant-temperature environment of 80°C to 100°C (100°C for high-pressure hoses and 80°C for low-pressure hoses).

Principle: This test simulates the effects of the high-temperature environment in the engine compartment (which can exceed 120°C) on hoses, to determine whether the rubber material softens, ages or undergoes dimensional changes, and whether the seals at the joints fail.

Low-temperature resistance test

Definition: A test to assess the material’s flexibility and resistance to embrittlement at low temperatures, in which the hose is placed in an environment of -40°C for 70 hours, followed by a bending test.

Principle: Low temperatures cause rubber materials to harden and become brittle. By subjecting the hose to bending (with a bending radius of five times the outer diameter), the test checks for cracks or breaks, thereby verifying its suitability for use in cold regions (such as the Northeast or Siberia).

Vacuum resistance test

Definition: A test to evaluate the structural stability and sealing performance of a hose under vacuum conditions, conducted by evacuating the hose to a vacuum of 1.33 kPa (absolute pressure) and maintaining this condition for 24 hours.

Principle: This test simulates the vacuum conditions that may occur on the evaporator side (low-pressure side) of an air-conditioning system to determine whether the hose collapses or leaks due to the difference in internal and external pressure.

Ozone resistance test

Definition: An accelerated ageing test in which a bent hose is placed in an environment of 40°C and an ozone partial pressure of 50 MPa for 70 hours, to assess the rubber material’s resistance to ozone ageing. Principle: Ozone reacts with the unsaturated bonds in the rubber, causing surface cracking; this accelerated test simulates the ozone attack that the hose might encounter in an outdoor environment.

Pulse fatigue test

Definition: A durability test in which a hose is subjected to cyclic pulsating pressure of (0.5–3.5) MPa (for high-pressure hoses) or (0.5–2.6) MPa (for low-pressure hoses) at a frequency of 30–40 cycles per minute, for a total of 150,000 cycles, in an environment of 125°C.

Principle: This test simulates the pressure fluctuations caused by engine vibrations and road surface irregularities during vehicle operation, in order to assess the fatigue resistance of the hose material and the reliability of the joint seal.

Refrigerant Permeability Test

Definition: A test conducted at temperatures between 80°C and 100°C to measure the rate at which refrigerant permeates per unit area of hose per unit time, thereby assessing the material’s barrier performance.

Principle: Using the mass loss method, this test determines whether refrigerant permeates through the molecular gaps in the rubber material, thereby verifying the effectiveness of the hose’s barrier layer (e.g. the PA nylon layer).

Test for extractable substances

Definition: A test to determine the concentration of substances that may leach from the inner surface material of a hose when exposed to refrigerant, and to assess the compatibility of the material with the refrigerant.

Principle: By cleaning with iso-octane and immersing in refrigerant, any additives, residual solvents or other substances that may be present on the inner surface of the hose are extracted, thereby preventing these substances from entering the air-conditioning system and affecting compressor lubrication or causing blockages in the expansion valve.

Test for the rate of volume change of the inner layer material

Definition: A test in which the inner rubber layer of a hose is immersed in a refrigerant, held at 100°C for 70 hours, and the rate of volume change is measured to assess the material’s compatibility with the refrigerant.

Principle: To determine whether the rubber material swells (increases in volume) or shrinks under prolonged exposure to the refrigerant, thereby verifying the suitability of the material formulation.

Bending strength test

Definition: A test conducted at ambient or low temperatures to measure the force required to bend a hose through 90°, thereby assessing the material’s flexibility and the soundness of the structural design. Principle: By subjecting the hose to bending, this test determines whether it bends easily during installation and use, whilst also verifying the material’s resistance to cracking under bending stress.

Test for the rate of change in length

Definition: The length variation test involves subjecting automotive air-conditioning refrigerant hoses to specific environmental conditions, measuring the difference in length before and after the test, calculating the percentage change in length, and assessing the dimensional stability of the hose material under simulated service conditions.

Principle: Temperature fluctuations cause materials such as rubber and reinforcing layers to expand and contract; refrigerant and compressor oil may penetrate the rubber material, causing it to swell or shrink, which in turn leads to changes in the hose’s length.

Internal surface cleanliness test

Definition: An internal surface cleanliness test is a procedure in which soluble impurities and insoluble particles adhering to the inner surface of automotive air-conditioning refrigerant hoses are extracted using methods such as solvent extraction and filtration, followed by quantitative analysis of the impurities to assess whether the cleanliness of the hose’s inner surface meets the system’s operational requirements. Principle: The test simulates the contact between the inner surface of the hose and the refrigerant/refrigeration oil. A specific solvent is used to thoroughly clean the inner wall of the hose, transferring all impurities into the solvent. The total amount of impurities and the particle size distribution are then quantified through filtration, drying, weighing or particle counting to verify whether they fall within the limits permitted by the standard, thereby preventing impurity contamination of the system at source.

How does a brushless AC motor controller make your electric motorcycle ride more smoothly?

The basic principle of an AC motor controller

The AC motor controller is one of the key components in electric motorcycles. It is responsible for transmitting electrical energy from the battery to the motor equipment. It ensures smooth acceleration of the vehicle, provides precise speed control and efficient energy utilization. For every rider, the AC motor controller can bring a more comfortable, safer and more durable riding experience.

Advantages of Advanced Brushless Controller

An advanced brushless AC controller has a significant impact on the assistance provided to electric motorcycles. It is reflected in four aspects: power, control, efficiency, and lifespan. Riders of electric motorcycles often place great emphasis on the riding experience. The advanced brushless electric motorcycle controller can optimize the response performance of the electric motorcycle motor to the greatest extent. By controlling the torque and speed of the motor, it helps the vehicle achieve smooth starting, precise acceleration, and enhances the handling of the vehicle on uneven road conditions, making the riding experience of the riders more comfortable.

Achieving smooth acceleration of electric motorcycles

Many high-performance electric motorcycles are equipped with industrial-grade ac motor controller because it can handle peak line current of over 300A, maintaining efficient and stable performance within the rated voltage range of 48V - 72V. These two controllers from WISEDRV not only can handle peak line currents of 350A/450A, but also have been meticulously designed and rigorously tested by professional technical teams during the production process, enabling them to withstand demanding riding conditions both in urban traffic and on highways, providing smooth operation. Another unique advantage of industrial-grade controllers is that they have robust product quality, ensuring that the electric motorcycles can still provide continuous power output under heavy loads.

Integrated efficiency and intelligent motor controller

A high-efficiency electric motorcycle motor controller can fully utilize the battery capacity, reducing unnecessary energy loss and heat generation. As a leading manufacturer of electronic control systems in the industry, WISEDRV's electronic control system perfectly combines efficiency and intelligence, creating an outstanding riding experience for electric motorcycles. WISEDRV's electronic control products are equipped with optional MOSFET modules, low-resistance MOSFETs, and integrated Bluetooth for monitoring, etc., enabling riders to achieve a longer single-charging range and extend the lifespan of the motor. In addition, UDS and OTA support facilitate updates and diagnostics, ensuring the system remains up-to-date and operates reliably.

Safety features facilitate smooth travel

The modern AC motor controller is equipped with safety functions such as overcurrent, overvoltage and overheating protection. The natural air-cooling method ensures that the electric motorcycle achieves the best heat dissipation effect without the need for an additional cooling system. These safety features guarantee the peace of mind and stability of electric motorcycle riders during daily commutes or long trips.

Move forward together with WISEDRV

Whether you are an electric motorcycle rider or a developer, if you are interested in industrial-grade, high-performance AC controllers, you can join hands with WISEDRV. We will provide you with a full range of AC motor controllers and technical support, opening up a smarter, safer and more durable riding experience!

How does a igbt transistor improve the efficiency of a industrial inverter?

How IGBTs Boost Operational Efficiency

When we talk about power supply equipment, industrial frequency converters and other devices, their working efficiency is not just a simple technical figure on paper. In fact, efficiency determines your energy consumption cost, heat control management, and the long-term reliability of the entire system. As a supplier of power semiconductor components, we are often asked a question: How does the IGBT power module improve and enhance the operational efficiency of industrial inverters? The key lies in the fact that the IGBT module has the ability to handle high voltages and large currents, especially during actual operation.

Inverter application IGBT device

Optimizing Switching to Reduce Losses

How can we understand this improvement? Let's take a typical example of an industrial inverter driving an AC motor as an illustration. The function of the inverter is to convert direct current into variable-frequency alternating current. During this process, the switching losses and conduction losses caused by the inverter are inevitable. And the IGBT, as the core switching device, can reduce these losses by lowering the saturation voltage and using faster switching edges. Our carefully designed gate drive board further optimizes the switching transition process, enabling the 400A IGBT for Industrial Inverter to help the equipment operate at the highest efficiency. An intuitive example is that in a motor controller operating at a 8 kHz switching frequency, the standard IGBT may emit 200 watts of heat, while the efficient IGBT can reduce this figure by 30%, thereby reducing the reliance on bulky heat sinks and active cooling functions.

Structural Optimization and Efficiency Advantages of High-Power 400A IGBT

Let's explore how a 400A IGBT can effectively enhance the performance of industrial systems. In many medium-power applications, the selection of a 650V 400A IGBT power transistor is a common choice. This is mainly because these devices achieve a good balance between their breakdown voltage and the current they can handle. When used in conjunction with a matching industrial IGBT inverter, the system can achieve more stable torque control, and you will also notice a reduction in overshoot.

More importantly, this trench gate IGBT power module etches vertical trenches on the silicon surface, creating narrower channels, thereby reducing the on-resistance. This design structure enables it to reduce the forward voltage by approximately 20% compared to the planar structure. The lower on-resistance not only allows the equipment to maintain a lower temperature under heavy loads, thereby directly increasing the overall efficiency by about 2%–3%, but also enables the inverter to output more power without upgrading the cooling system. This is a crucial performance improvement for industrial systems that need continuous operation.

Energy conservation and efficiency improvement in actual production

During the actual operation, the running time of equipment is equivalent to money. By selecting appropriate and efficient IGBT power modules (such as 400A 650V trench gate power modules), industrial inverters not only can reduce losses and improve efficiency, but also can lower additional energy expenditures. Moreover, they can operate the inverters at a higher switching frequency, reduce noise impact, and improve the working environment. For the purchaser or engineer, choosing IGBT is not only choosing a switching component, but also the key to enhancing industrial performance, reducing operating costs, and improving customer satisfaction.

How does the motor controller solve the energy consumption problem through the MOSFET module?

The electric vehicle market is currently in a golden period of rapid development. During this period, energy consumption remains the most concerned core issue for vehicle manufacturers, users, and all parties involved. As vehicles continue to undergo technological innovation and iteration, the position of motor controllers as components in the industry has become increasingly prominent. Many component manufacturers, when developing controllers, strive to maximize the performance of the controllers while reducing power loss. Nowadays, selecting MOSFET modules in the controllers has become a breakthrough solution to solve energy consumption problems.

custom motor controller manufacturer

Core Breakthrough | 48V Brushless Controller

Currently, the mainstream electric two-wheel vehicles mostly adopt 48V motor controllers as their key components. Due to its high voltage adaptability, balanced power, and energy-saving efficiency, it holds a dominant position in the two-wheeled electric vehicle market. With technological innovation, this product has achieved a significant breakthrough. The controller can be optionally equipped with a MOSFET module, further enabling precise regulation of current flow and reducing unnecessary energy consumption. After research and development refinement, the efficiency-optimized 48V brushless motor controller enhances the user experience, allowing for long-range, high-sensitivity, and fast-response vehicle operation.

Key Technology | Efficient MOSFET Switching Control

The MOSFET module plays a crucial role in both the efficient switching control and the low on-state loss aspects. With its low on-state resistance, the MOSFET can significantly reduce the power loss of vehicle components when they are in the on-state. Additionally, when combined with PWM switching, it can precisely match the power required by the motor or generator based on the actual load conditions. The two work together to effectively avoid the waste of electrical energy, thereby enabling the controller to reduce operating energy consumption.

Energy-saving strategies | Function mode adaptation

In terms of energy-saving management, the MOSFET module also plays a significant role. It can precisely drive the necessary working circuits according to different driving conditions, further improving work efficiency.

Start-up mode: The MOSFET starts the motor alone, concentrating the power output.
Assist mode: It flexibly adjusts the output power in accordance with the acceleration requirements during riding.
Power generation mode: It maintains a stable constant voltage/constant current output, eliminating energy loss caused by excessive power generation.

Reducing the energy consumption loss of the vehicle, precisely adapting to real-time needs, and comprehensively optimizing the user's riding experience.

Quality Selection | WISEDRV High-Quality Controller

High-performance electric vehicles require a strict selection of high-quality industrial motor controller manufacturers. By collaborating with experienced vehicle component suppliers, the components obtained will definitely be reliable and can also provide necessary technical support during the later assembly process. In industrial applications, safety and reliability come first, followed by the long-term durability of the product. A reliable manufacturer can help enhance the overall efficiency of the vehicle's system.

In order to help two-wheel electric vehicles/electric motorcycles achieve lower energy consumption and longer range, we have specially designed a low-loss electric motorcycle motor controller. The most important thing is that MOSFET modules can be optionally selected, which solves the long-standing problem of energy consumption. The following table shows the key parameters and superior performance of different models of WISEDRV:

Model No.

Type

Applicable Sensor

Operating Voltage Range

Rated Voltage

Peak/Rated Current

Bus Current

Communication Method

MOSFET Module

Product Features

48V-72V (60-80km/h)

Generator Controller

Hall Sensor

35-85Vdc

48/60/72Vdc

60A/260A

80A

Single-wire Communication / CAN2.0

Optional

Supports start, power assist and power generation modes;

built-in Bluetooth function

48V-72V (100-120km/h)

Motor Controller

Magnetic Encoder

35-85Vdc

48/60/72Vdc

160A/350A

150A

Single-wire Communication / CAN2.0

Optional

Integrated Bluetooth, UDS diagnosis and OTA remote upgrade functions

To view the detailed parameters of the product, please visit our product page. This will help you select the most suitable controller.

Learn about us | Contact us

If you want to know how your application can improve battery life and efficiency through these optimization techniques, please feel free to contact us directly - click on "Get a Quote" on the page, and our team will provide a professional solution based on your needs.