Direct injection gasoline engine

Details Direct injection gasoline engine Direct injection gasoline engine

2000-05-24

2001-04-03

Kwon, John (Department: 3747)

Internal-combustion engines

Combustion chamber means having fuel injection only

Injected fuel spraying into whirling fluid

C123S276000, C123S305000

Reexamination Certificate

active

06209514

ABSTRACT:

BACKGROUND OF THE INVENTION
The invention relates to a direct injection type internal combustion gasoline engine and particularly to improvements in direct injection type internal combustion engines which employ both homogeneous charge combustion and stratified charge combustion.
A conventional engine injects gasoline into the air intake port upstream of the combustion chamber. The air-fuel mixture is then transported to the combustion chamber where it is burned. In contrast to this arrangement, a direct injection gasoline engine has the fuel injector located inside the combustion chamber so that the fuel is injected directly into the cylinder.
SUMMARY OF THE INVENTION
It is an object of the invention to provide an improved direct injection engine.
The engine of the present invention has a piston which includes a first inclined surface approximately parallel to an intake-side inclined surface of a cylinder head and a second inclined surface approximately parallel to an exhaust-side inclined surface of the cylinder head. A cavity combustion chamber is recessed in the first inclined surface. A pair of valve recesses is also recessed in the first inclined surface. An arcuate dam section is formed along the periphery of the valve recesses with the first inclined surface.


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