The clutch master cylinder transforms the drivers required release travel, applied via the clutch pedal, into a hydraulic pressure.

Clutch Master Cylinders

By way of a mechanical link this converts the movement of the clutch pedal, during its compression by the driver, to hydraulic pressure which is subsequently used in the clutch system. To reduce the weight, at present this component is usually made of plastic.

The position sensor or switch may be integrated into the clutch master cylinder, e.g. to provide information on the clutch engaging to the control unit for cruise control or preventing the vehicle from starting if the clutch pedal is not engaged.

In addition to this, sensor signals are used for other control systems, such as a brake control unit for the electrical parking brake or an engine control unit for the start/stop system function, or traction control.   

Brochure