Definition, Meaning & Synonyms

rocker-arm

noun

/ˈrɒkər ɑrm/

Definition

A rocker arm is a mechanical component in an internal combustion engine that converts the linear motion of the push rod into a rotational motion, allowing the opening and closing of the engine’s valves.

Examples

The rocker-arm adjusts the timing of valve openings for optimal engine performance.
Replacing a worn rocker-arm can significantly improve engine efficiency.
Many high-performance cars use aluminum rocker-arms to reduce weight.

Meaning

In the context of engine mechanics, a rocker arm facilitates the operation of valves, which are essential for controlling the flow of air and fuel into the engine’s cylinders and the exhaust gases out of them.