Exhaust gas recirculation pre-stratified charge

摘要

A low pollution internal combustion engine is disclosed in which a predetermined portion of a stratified charge is initially pre-formed in the part of the manifold which supplies the predetermined charge portion to the cylinder, said predetermined charge portion being composed of fuel-air mixture diluted by exhaust gas and pre-formed when the intake valve for the cylinder is in the closed condition, and subsequently being introduced together with the remaining portion of the stratified charge, when the intake valve is opened during the intake stroke of the engine.