Patent ID: 6574961
Filing Date: 2003-06-10
Classification: F01N,F02B,F02D,F02M,Y02T

Abstract:
A direct-injection engine having:a fuel injector for direct injection of fuel into an engine combustion chamber; an intake valve and an exhaust valve located at an inlet port and an outlet port of said engine combustion chamber; a variable valve mechanism for controlling the valve opening-closing phase of said intake or exhaust valve; a turbine mounted in an exhaust passage of said engine and turned with the exhaust gases; a compressor mounted in an intake passage of said engine and turned with the turning force of said turbine; a bypass passage for bypassing said turbine; and a control valve for regulating the flow rate of the exhaust gases flowing into said bypass passage; said direct-injection engine being configured to provide an exhaust gas scavenging acceleration which controls, from termination of an exhaust stroke to initiation of air intake stroke, said variable valve mechanism or said control valve to accelerate and expel exhaust gas in said combustion chamber using engine intake air.