Controller for direct injection engine

Details Controller for direct injection engine Controller for direct injection engine

2008-05-29

2010-11-30

Vo, Hieu T (Department: 3747)

Internal-combustion engines

Combustion chamber means having fuel injection only

Using multiple injectors or injections

C123S090150, C701S103000

Reexamination Certificate

active

07841316

ABSTRACT:
When an engine is at starting or at cold state, a closing time of an exhaust valve is set before an intake top dead center to close the exhaust valve early. An exhaust residual gas is compressed by a cylinder to raise an inner cylinder temperature. A pre-fuel injection is performed from a time of closing the exhaust valve to a time of the intake top dead center in such a manner that the pre-injected fuel is combusted to raise the inner cylinder temperature. This increase in temperature expedites an atomization of fuel injected at a main fuel injection. A wet amount of fuel is reduced and HC emission is also reduced.

REFERENCES:
patent: 6637386 (2003-10-01), Murata et al.
patent: 7222602 (2007-05-01), Fukasawa
patent: 2001-115866 (2001-04-01), None
patent: 2004-245103 (2004-09-01), None
patent: 2006-291916 (2006-10-01), None
patent: 2006-342781 (2006-12-01), None
Chinese Office Action dated Feb. 12, 2010, issued in corresponding Chinese Application No. 200810131502.2, with English translation.

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