Patent ID: 6520144
Filing Date: 2003-02-18
Classification: F02B,F02D,F02F,F02M,F05C,Y02T

Abstract:
A cylinder injection type internal combustion engine, comprising:a combustion chamber into which air is sucked; a fuel injection valve for injecting fuel directly into said combustion chamber; an ignition plug for igniting the injected fuel a piston for changing the volume of said combustion chamber, wherein said piston has a top face configured to allow the flow of air to go from the side of the wall surface in said combustion chamber opposite to said fuel injection valve to just under said fuel injection valve, and air layers are formed between the piston and an injected fuel spray, one of the air layers flowing on the face of the piston and another of the air layers flowing in opposite directions such that fuel spray is isolated from the top face of said piston and diffusion of the fuel spray throughout the combustion chamber is minimized so as to concentrate the fuel spray in a region of the ignition plug.