Patent ID: 6302080
Filing Date: 2001-10-16
Classification: F02D,F02M,Y02T

Abstract:
A fuel injection system for an internal combustion engine, comprising:fuel injector for directly injecting fuel into a cylinder of an internal combustion engine; andcontrol means for executing an injection of the fuel from the fuel injector by a pre-injection and a main injection per cycle of the internal combustion engine,wherein the control means controls the fuel injector so that the fuel injected by the pre-injection is formed into a stratified spray of uniform mixture concentration in a predetermined zone in the cylinder at an ignition timing after the pre-injection, and the fuel injected by the main injection passes through the stratified spray zone formed by the pre-injection and burns with an un-used air remaining in a zone in the cylinder other than the predetermined zone; andwherein the pre-injection and the main-injection are separated by a non-injection interval.