Description & Operation: Description
- Variable Force Solenoid (VFS) supplies the engine oil to the cam phaser or cuts the engine oil from the cam phaser in accordance with the Engine Control Module (ECM) Pulse Width Modulation (PWM) control signal, the cam phaser which varies the cam phase by using the hydraulic force of the engine oil.
- The delivered oil rotates the rotor connected to the camshaft of the cam phaser and rotates the camshaft to the engine rotating direction (intake advanced/exhaust retarded) or the opposite direction (intake retarded/exhaust advanced) to change the phase angle of the cam.