The clutch is a vital component in a vehicle's powertrain system. Its function is to disconnect and reconnect power transmission between the engine and transmission, ensuring smooth vehicle starts, gear shifts, and braking. The clutch operates primarily by utilizing friction to transmit or interrupt power. Consequently, its structure and performance directly impact the vehicle's performance and longevity.
The basic structure of a clutch consists of the following main components:
Flywheel: A large metal disc mounted at the rear end of the engine crankshaft. It stores kinetic energy output by the engine and balances irregular torque generated during engine operation. The flywheel is also part of the clutch's driving component. Together with the pressure plate, it clamps the driven plate to form a friction surface for transmitting or disconnecting power.
Pressure Plate: A metal disc mounted on the flywheel, the pressure plate can move axially along the flywheel. Its pressure against the flywheel is controlled by the pressure mechanism. As part of the clutch's driving component, it clamps the driven plate between itself and the flywheel, creating a friction surface to transmit or disconnect power.
Driven Plate: The driven plate is a metal disc mounted on the transmission input shaft. It features friction linings on both sides that engage with the flywheel and pressure plate. As part of the clutch's driven component, it connects to the transmission input shaft via a splined hub, transmitting power from the flywheel and pressure plate to the transmission.
Clamping Mechanism: The clamping mechanism controls the pressure between the pressure plate and flywheel. It consists of multiple clamping springs evenly distributed around the circumference. This mechanism can press the pressure plate and driven plate against the flywheel, ensuring tight contact between all three components to form an effective friction surface. Conversely, it can separate the pressure plate and driven plate, creating clearance between them to interrupt the friction surface.
Operating Mechanism: The operating mechanism allows the driver to control clutch disengagement or engagement via the clutch pedal. It comprises components such as the release lever, release fork, release bearing, release rod, release sleeve, master cylinder, and slave cylinder. This mechanism can push the release bearing hydraulically or mechanically to interact with the pressure plate mechanism, thereby achieving clutch disengagement or engagement.
