determines how much, how long, and when the valves open.
Camshaft duration is expressed in .
Lobe separation angle is measured in .
The is also called the valve cam phaser. It consists of an engine control module and a four-way pulse-width-modulated control valve.
The on an overhead camshaft engine uses a camshaft piston sensor on each camshaft. Each camshaft also has its own actuator and oil control valve and uses a rotor with four vanes connected to the end of the camshaft.
What could happen if the timing were out of phase?