Internal-combustion engines – Combustion chamber means having fuel injection only – Using multiple injectors or injections
Patent
1998-09-29
2000-05-30
Wolfe, Willis R.
Internal-combustion engines
Combustion chamber means having fuel injection only
Using multiple injectors or injections
123295, 123300, 123478, F02D 4102
Patent
active
060679549
ABSTRACT:
A direct injection engine including an injector disposed in an upper portion of a combustion chamber defined above a piston disposed in a cylinder of the engine with a fuel injecting direction of the injector being provided so that a fuel being injected toward a top portion of the piston, an ignition plug disposed at an upper portion of the combustion chamber, an engine operating condition detector for detecting an engine operating condition. The fuel is injected in a compression stroke from the injector when it is detected by the engine operating condition detector that the engine is in a low engine load and speed zone so as to stratify an injected air fuel mixture around the ignition plug to accomplish a stratified combustion. The engine further includes a fuel controller for controlling an fuel injection so as to inject the fuel plural times into the combustion chamber in a compression stroke when at least one of an engine load and an engine speed is relatively high in an engine operating zone for accomplishing the stratified combustion. A stable combustion is accomplished to improve the fuel consumption efficiency.
REFERENCES:
patent: 4621599 (1986-11-01), Igashira et al.
patent: 5078107 (1992-01-01), Morikawa
patent: 5154152 (1992-10-01), Yamane et al.
Kudou Hidetoshi
Marubara Masashi
Ota Noriyuki
Yamashita Hiroyuki
Abrams Hugh A.
Mazda Motor Corporation
Vo Hieu T.
Wolfe Willis R.
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