![]() Why is it important to choose a high-quality Oil Control Valve? Oil control valves also help to lubricate timing chains and their sprockets. This helps the engine to optimize its power output and fuel consumption. In summary, the ECU, oil control valve, and the cam’s control mechanism work together to make the valves open and close earlier or later. At constant engine speeds the oil control valve will close, and the cams will return to their initial positions. The timing of the engine is modified internally you will not be able to notice any difference to the camshaft by viewing the engine from the outside.ĭepending on the engine speed and the acceleration pedal position, the camshaft position is either advanced or retarded by the engines ECU. VVT cams have a control mechanism that change the cam position in relation to the timing chain or timing belt depending on how the oil flow passes through the VVT. Oil control valves are fed by the engines pressurized oil which allows or blocks the oil flowing through them to affect the timing of the camshaft. a 4-cylinder engine with VVT in the intake camshaft) to four oil control valves (e.g a V6 or V8 engines with VVT on both camshafts). Engines (depending on specifications) can have one oil control valve (e.g. Some types of engines only vary the timing of the intake camshaft while other types of engines vary both the intake and the exhaust camshafts. The oil control valve is an actuator (solenoid) which is controlled by the engine’s ECU (Electronic Control Unit) to guide the VVT systems in advancing or retarding the valves’ timing by altering the camshaft angle position in correlation to the engine crankshaft. ![]() ![]() All VVT systems which are controlled by oil pressure have at least one oil control valve. There are different VVT designs depending on the engine’s make and model. Oil control valves are an essential part in an internal combustion engine with variable valve technology (VVT). ![]()
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