The hydraulic clutch system is a transmission system that uses hydraulic fluid as a medium to achieve clutch engagement and disengagement. It mainly consists of the following parts: clutch pedal, clutch master cylinder, clutch slave cylinder, hydraulic oil line and clutch pressure plate. 

The working principle of the hydraulic clutch system is relatively simple and efficient, mainly through the hydraulic system to achieve the clutch disengagement and engagement. The following are the detailed steps of the hydraulic clutch system:

I. Overview of the working principle of the hydraulic clutch system

Hydraulic clutch system uses the pressure of the fluid to transmit power, so as to control the clutch release and engagement. When the driver depresses the clutch pedal, this action through a series of mechanical connections ultimately transformed into a hydraulic system within the oil pressure changes, and then drive the clutch actuator to complete the clutch release or engagement.

Second, the hydraulic clutch system specific work steps

1. Pedal operation:

The driver depresses the clutch pedal.

2. Push rod transmission:

The clutch pedal is connected to the clutch master cylinder through the push rod. When the pedal is pressed, the push rod pushes the piston of the master cylinder to move to the left.

3. Oil pressure generation:

The movement of the master cylinder piston causes the oil in the master cylinder and pipeline to be pressurised, and the oil pressure rises.

4. Oil pressure transfer:

Under the action of oil pressure, the high-pressure oil is transferred to the clutch sub-pump through the oil pipe.

5. Sub-pump action:

After the clutch sub-pump receives the oil pressure, its internal piston is also pushed to the left.

6. Actuator action:

The movement of the piston of the sub-pump pushes the release pedal, which in turn drives the release bearing forward.

The forward movement of the release bearing increases the gap between the clutch pressure plate and the clutch disc, thus achieving clutch disengagement.

7. Clutch state change:

When the clutch is disengaged, the power transmission from the engine is cut off, and the vehicle enters the neutral coasting state or prepares to shift gears.

When the driver releases the clutch pedal, the above process is reversed, the clutch is re-engaged, and the engine power transmission is resumed.

Third, the following is the working process of the hydraulic clutch system: 

1. When the driver depresses the clutch pedal, the pedal is connected to the clutch master cylinder through the connecting rod and hydraulic line, pushing the piston in the master cylinder to move to the left. The movement of the piston generates pressure in the master cylinder, causing hydraulic fluid to enter the clutch slave cylinder through the lines. 2. 

2. In the clutch slave cylinder, the hydraulic fluid pushes the piston to the left, and this action pushes the clutch pressure plate forward, thus disengaging the clutch. There is a certain gap between the clutch pressure plate and the clutch disc. When the pressure plate moves forward, the clutch disc moves with it, thus achieving separation from the engine flywheel. 

3. When the driver releases the clutch pedal, a spring causes the piston in the clutch slave cylinder to move to the right, reducing the pressure in the cylinder and allowing hydraulic fluid to flow out of the clutch master cylinder. This action causes the clutch pressure plate to move rearward, thus engaging the clutch. As the pressure plate moves backward, the clutch disc moves with it, thus engaging the engine flywheel. 

4. When the clutch is engaged, the engine power can be transferred to the gearbox through the clutch disc for power transmission. At this time, the hydraulic oil in the hydraulic oil pipeline will be compressed and stored energy, so that when the driver depresses the clutch pedal again, the piston can be pushed quickly to move to achieve clutch disengagement. 

Fourth, the hydraulic clutch system features and advantages

Automatic compensation of wear: the hydraulic clutch system can automatically compensate for the wear of the friction element, prolonging the service life of the clutch.

Compact structure: hydraulic transmission makes the clutch system structure more compact, easy to arrange in the limited space.

Smooth operation: the hydraulic transmission has a cushioning effect, making the clutch disengagement and engagement process smoother and more shock-free.

Boosting effect: The hydraulic system reduces the force that the driver needs to exert, making the clutch pedal feel lighter.

Responsiveness: The hydraulic system allows for a quick response, making clutch engagement and disengagement quicker and more precise.

Reliability: Because hydraulic systems reduce the number of mechanical connections, they are less susceptible to wear and stretch than traditional pull-wire clutch systems.

In summary, the hydraulic clutch system controls clutch disengagement and engagement through the change of oil pressure within the hydraulic system, which has the advantages of simple structure, smooth operation, automatic compensation of wear and reliability. In addition, the hydraulic clutch system also has the advantages of low friction, high temperature resistance, no pollution, etc. These features make the hydraulic clutch system widely used in the field of automobiles, construction machinery and other fields.