Patent ID: 6182621
Filing Date: 2001-02-06
Classification: F01L,F02B,F02D,Y02T

Abstract:
A method of affecting a mixture formation and motion of a charge in a cylinder of an externally ignited internal-combustion engine during a suction cycle of a gas intake valve of the cylinder; said suction cycle having a first cycle portion and a subsequent, second cycle portion; the method comprising the following steps:(a) introducing air and fuel into the cylinder during said suction cycle;(b) maintaining, during said second cycle portion, said gas intake valve in a first open position at full valve stroke in which said gas intake valve has a fully open cross-sectional flow passage area; and(c) maintaining, during said first cycle portion, said gas intake valve in a second open position at a partial stroke of said gas intake valve; said partial stroke being less than one half of said full stroke; and in said second open position said gas intake valve having a partially open cross-sectional flow passage area.