variable valve timing is where the engine changes valve timing based on the driving situation much like ignition timing is changed to meet the needs of the engine in specific situations. in most cars valve timing is static and determined by the timing gear on the camshaft
valve timing diagram of two stroke engine
It is the "Advertised duration", used by the factory. It is the Valve timing from when the valve is .006inches off the valve seat to .006" off the valve seat.
According to Wikipedia, a variable valve timing is a "process of altering the timing of a valve lift event, and is often used to improve performance, fuel economy or emissions".
Valve timing is not adjustable on a stock engine. The timing chain is either installer correctly or not.
Yes accuauly its the cam that does control valve timeing.. on the lobes of the cam .
to inject oil into the valve timing controller assembly
Ignition timing or valve timing?
Ignition timing or valve timing?
bad timing,worn cam,valve adjustment
This component is electrically operated by the engine computer. It (on most vehicles) changes the oil pressure in the variable valve timing system to adjust the valve timing. It is very similar to the solenoids in use inside an automatic transmission.
there are two kinds of timing marks. one is for ignition timing and one for valve timing.