Patent ID: 6267097
Filing Date: 2001-07-31
Classification: F01L,F02B,F02D,F02P,Y02T

Abstract:
A compression self-igniting gasoline engine wherein stroke cycles comprising an intake stroke, a compression stroke, a power stroke and an exhaust stroke are repeated sequentially by a piston, and self-ignition of a fuel mixture is performed by compression of the fuel mixture in the compression stroke, comprising:a fuel injector facing the combustion chamber;an intake valve which introduces intake air to the combustion chamber;an exhaust valve which ejects burnt gas from the combustion chamber;a sensor which detects the strokes of the piston;a valve timing adjustment mechanism which varies an open/close timing of the intake valve and the exhaust valve; anda microprocessor programmed to:control the valve timing adjustment mechanism so that a sealed period when both the exhaust valve and the intake valve are closed, appears near top dead center of the exhaust stroke; andcontrol the fuel injection timing of the fuel injector so that the fuel is injected into the combustion chamber in the sealed period.