Valeoscope - Transmission Syst. Clutch HEC SAT product focus

H.E.C. desing and

composition

H.E.C. is a combination of an improved facing

material and a robust clutch cover assembly.

Valeo high quality & very low

wear friction material

Hub

Pressure plate

Hardened

diaphragm

Robust cover

housing

Rivet

Rondelle

Return spring

9.1 Clamp load characteristics

The clamp load is the load exerted by the diaphragm

to clamp the disc between the pressure plate and

the flywheel. The high-resistance facing material

prevents pressure plate displacement and thus

keeps the clamp load almost constant.

The graph below shows the H.E.C. clamp load

variation for a new clutch and for a used clutch. The

clamp load is constant over the lifetime of the clutch

to ensure effective torque transfer.

Composition of H.E.C.