Function of automobile clutch master cylinder 

When the driver depresses the clutch pedal, the push rod pushes the master cylinder piston to increase the oil pressure and enters the slave cylinder through the hose, forcing the slave cylinder pull rod to push the release fork and push the release bearing forward; When the driver releases the clutch pedal, the hydraulic pressure is released, the release fork gradually returns to the original position under the action of the return spring, and the clutch is engaged again.