Patent ID: 6397813
Filing Date: 2002-06-04
Classification: F02D,F02M,Y02T

Abstract:
An internal combustion piston engine having at least one combustion chamber bounded by a cylindrical wall, a top portion of a reciprocating piston and a cylinder head, the engine comprising:at least two intake ports formed in the cylinder head, each intake port providing an opening into the combustion chamber; a plurality of intake valves each associated with one of the intake ports; a plurality of valve actuators cooperating respectively with the plurality of intake valves to enable the intake valves to be independently opened and closed during engine operation on a controlled time/lift schedule; and a controller cooperating with at least one of the plurality of actuators for independently varying the time/lift schedule of at least one of the respective intake valves relative to another one of the respective intake valves associated with the combustion chamber as a function of engine operating conditions to vary intake swirl as engine operating conditions vary.