The semi-hydraulic system includes a clutch release cylinder as the receiver, whereas a fully-hydraulic system uses a clutch slave cylinder.

Hydraulic clutch release systems follow the same principle as hydraulic brakes, with a transmitter connecting to a receiver via a hose. The CMC is connected to a plastic or metal tank filled with hydraulic fluid, and this fluid reservoir tank is sometimes shared with the brake master cylinders. The Clutch Master Cylinder’s function is to transfer the clutch pedal movement to the clutch via hydraulic fluid. How Does the Clutch Master Cylinder Work? This benefit is the primary reason hydraulic clutches are easier to implement on OE projects. In addition, hydraulic clutches reduce weight by up to 70% compared to standard clutch systems. Hydraulic systems improve driver comfort thanks to optimal and constant pedal effort. Other benefits are also driving the adoption of hydraulic systems. This design saves space while Improving flexibility and reliability. Manufacturer requirements have driven the need for hydraulic systems for clutches, which remove the requirement for a straight cable line between the pedal and lever. It transmits the pressure from the clutch pedal to the clutch itself, allowing the driver to engage the clutch and change gears. The clutch master cylinder (CMC) is a component of car clutch systems, specifically semi- and fully-hydraulic clutch systems.

In response to this market trend, Valeo has developed a wide range of hydraulic parts: clutch master cylinders (CMC), clutch release cylinders (CRC) and clutch slave cylinders (CSC.) Today 93% of new vehicles in Europe use hydraulic clutch systems.

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