What is the principle of the clutch slave cylinder booster?

1 Answers
LaAlina
07/29/25 3:42pm
When the pneumatic booster of the car clutch is installed in the hydraulic control mechanism and shares a compressed air source with the pneumatic braking system and other pneumatic equipment, it is called the clutch slave cylinder booster. The clutch slave cylinder booster mainly consists of four parts: the pneumatic control valve, hydraulic cylinder, power piston, and housing. The car clutch is located in the flywheel housing between the engine and the transmission. The clutch assembly is fixed to the rear plane of the flywheel with screws, and the output shaft of the clutch is the input shaft of the transmission. During driving, the driver can press or release the clutch pedal as needed to temporarily disconnect or gradually engage the engine and transmission, thereby cutting off or transmitting the power from the engine to the transmission. The clutch master cylinder and slave cylinder function as two hydraulic cylinders. The master cylinder has inlet and outlet oil pipes, while the slave cylinder has only one pipe. When the clutch is pressed, the pressure from the master cylinder is transmitted to the slave cylinder, which then operates, causing the release fork to separate the clutch pressure plate and disc from the flywheel, allowing gear shifting to begin. When the clutch is released, the slave cylinder stops working, and the clutch pressure plate and disc re-engage with the flywheel, resuming power transmission, with the oil from the slave cylinder flowing back into the oil reservoir. To enable the driver to perceive and control the degree of clutch disengagement or engagement at any time, the output force of the pneumatic booster has an increasing functional relationship with the clutch pedal stroke. Additionally, if the pneumatic booster system fails, it ensures that the clutch can still be operated manually.
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