Cruise Control Systems: Operation: Actuator

Actuator consists of a motor, safety magnetic clutch, position sensor, pulley and a cable connected to engine throttle valve. When actuator receives a signal from cruise control ECU, it engages safety magnetic clutch and activates motor. Motor causes pulley and cable to move, which will open or close engine throttle valve.

When motor rotates forward, pulley also rotates (via safety magnetic clutch, gears and drive shaft). A cable connected to engine throttle valve and opens valve accordingly. When motor rotates in a reverse direction, pulley and cable also rotate in a reverse direction and engine throttle valve closes.