Valve timing arrangement for internal combustion engine having multiple inlet valves per cylinder

摘要

At least one of two inlet valves provided per cylinder of a multi-cylinder internal combustion engine is operated using a variable valve timing device. This device is controlled in response to the load and rotational speed of the engine in a manner which reduces the lift of the valve at low engine speeds and stepwisely increases the same as the engine moves from one mode of operation to the other. In the event that only one valve is controlled this valve is selected to be the one other than that which generates swirl in the combustion chamber.