Rocker arm / Roller cam follower

Precise control of inlet and outlet valves is crucial for the performance and efficiency of modern combustion engines. In automotive technology, four valves per cylinder are usually used – two for the intake of fresh air or air-fuel mixture, two for the exhaust gas outlet. Depending on the engine concept, rocker arms or (roller) cam followers are used for valve operation. The aim is to minimise friction and wear and tear for moving components. The valve clearance can be adjusted precisely using built-in setting discs to ensure a stable combustion process and prevent engine damage.