An automotive hydraulic clutch is a device that utilizes hydraulic transmission principles to control clutch disengagement and engagement. It is widely used in modern automobile transmission systems and is a key component connecting the engine and transmission. The following is a detailed introduction of the automotive hydraulic clutch:

I. Definition of hydraulic clutch

Automotive hydraulic clutch transmits power through a hydraulic cylinder to realize the combination and separation of the clutch. It uses the pressure change of the oil to control the working state of the clutch, so as to realize the power transmission or cut off between the engine and the gearbox.

Second, the hydraulic clutch structure composition

Automobile hydraulic clutch is mainly composed of master clutch cylinder, slave clutch cylinder, pipeline, pressure plate, clutch disk, reset spring and other components. Among them, the master clutch cylinder and the slave clutch cylinder are the core components of the hydraulic system, which control the separation and engagement of the clutch through the pressure change of the fluid.

Third, the hydraulic clutch working principle

When the driver depresses the clutch pedal, the piston of the master pump moves to the left through the push rod, and the oil in the master pump and pipeline is pressurized and the pressure rises. Under the action of oil pressure, the piston of the sub-pump is also pushed to the left, pushing the release pedal and driving the release bearing to separate the clutch. At this time, the power transmission between the engine and the transmission is cut off. When the driver releases the clutch pedal, the hydraulic system releases the pressure, the reset spring re-engages the clutch disk with the pressure plate, and the power from the engine is retransmitted to the transmission.

Reasons why hydraulic clutches feel stiff or hard to depress and solutions:

Hydraulic clutches play a vital role in your vehicle, but sometimes they can feel stiff or hard to depress. This can be caused by a variety of reasons, and the following is a list of those reasons and their solutions:

I. Failure of the hydraulic system

1. Air in the hydraulic system:

Cause: air into the hydraulic system, the formation of bubbles, affecting the normal flow of oil and pressure transfer, resulting in abnormal pedal feel.

Solution: exhaust operation to remove the air in the hydraulic system.

2. Hydraulic oil aging or insufficient:

Cause: Aging, deterioration or insufficiency of hydraulic fluid will reduce the transfer efficiency of the hydraulic system and make pedal operation difficult.

SOLUTION: Check and replace the hydraulic oil to ensure that it is of good quality and at the correct level.

3. Master cylinder or slave cylinder failure:

Cause: Damaged internal seals, piston jamming and other problems can cause the hydraulic oil to leak or fail to maintain pressure.

Solution: Check and replace the seals of the master cylinder and slave cylinder to ensure that the piston moves freely.

4. Hydraulic piping problems:

Cause: clogged lines, leaks or air entry will affect the normal operation of the hydraulic system.

Solution: Clean the hydraulic lines and fittings to ensure that the fluid flows freely and repair any leaks.

Second, clutch parts wear

1. Clutch plate wear:

Cause: Prolonged use will cause the clutch plate to wear out, affecting the clutch engagement effect.

Solution: Replace the worn clutch plate.

2. Pressure plate problem:

Cause: Pressure plate spring failure or uneven pressure plate surface will affect the normal operation of the clutch.

Solution: Check and replace the pressure plate and its spring.

Other factors

1. Clutch pedal return spring failure:

Cause: Failure or loss of elasticity of the return spring will result in the pedal not being able to return fully or feeling stiff.

Solution: Replace the return spring with a new one.

2. Foreign matter at the pedal:

Cause: Dust, dirt and other foreign matter may accumulate around the pedal and prevent normal pedal movement.

Solution: Remove foreign matter around the pedal to ensure smooth pedal movement.

3. Temperature effects:

CAUSE: The viscosity of the hydraulic fluid increases in low temperatures, which may affect the operating feel of the pedal.

Solution: In cold weather, warm up the vehicle in advance to ensure normal operation of the hydraulic system.

Solution Summary

1. Regular inspection and maintenance: Check and replace the hydraulic oil regularly to keep the hydraulic system clean and in good condition.

2. Professional maintenance: For complex faults in the hydraulic system and wear and tear of clutch components, it is recommended that professional technicians carry out inspection and maintenance.

3. Pay attention to the use environment: In extreme weather conditions, pay attention to the preheating and protection of the vehicle to minimize the impact on the hydraulic system and clutch.

If the above methods fail to solve the problem, it is recommended to send the vehicle to a professional repair store for further diagnosis and repair. Professional technicians can conduct a more in-depth inspection with specialized tools and equipment to determine the exact cause of the problem and take appropriate repair measures. It is the responsibility of every vehicle owner to ensure driving safety and proper functioning of the clutch system.