CYLINDER INJECTION TYPE INTERNAL COMBUSTION ENGINE - MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA

Title:

CYLINDER INJECTION TYPE INTERNAL COMBUSTION ENGINE

Document Type and Number:

Japanese Patent JP3642194

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To provide a cylinder injection type internal combustion engine with an occlusion type NOx catalyst, in which the occlusion type NOx catalyst is early brought in a high temperature state so that occluded SOx can be certainly purged at any time without degradation of fuel consumption.
SOLUTION: This cylinder injection type internal combustion engine has two-stage injection steps (S16, S26) and rich air-fuel ratio operation steps (S20, S30). In the two-stage injection steps (S16, S26), a part of fuel is injected as a main injection in either contpression stroke or intake stroke, while the residual part of the fuel is injected as an auxiliary injection in an expansion stroke. In the rich air-fuel ratio operation steps (S20, S30), the fuel is injected in the intake stroke such that an air-fuel ratio becomes a rich air-fuel ratio. When a sulfur component (an S component) must be removed (S10), the two-stage injection steps (S16, S26) and the rich air-fuel ratio operation steps (S20, S30) are executed by a sulfur component purge means (S purge control) alternately or in every cylinder (S14-S24).

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Inventors:

Kojiro Okada
Hiromitsu Ando
Takashi Dogahara
Yasuki Tamura
Takashi Kawabe
Satoshi Yoshikawa

Application Number:

JP22217598A

Publication Date:

April 27, 2005

Filing Date:

August 05, 1998

Export Citation:

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Assignee:

MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA

International Classes:

F02D45/00; F01N3/08; F01N3/20; F01N3/24; F01N3/28; F01N3/36; F02D41/02; F02D41/04; F02D41/34; F02D41/36; (IPC1-7): F02D41/34; F01N3/08; F01N3/20; F01N3/24; F01N3/28; F01N3/36; F02D41/02; F02D41/04; F02D41/36; F02D45/00

Domestic Patent References:

JP8189388A
JP7217474A
JP10153138A
JP8218918A
JP11062563A
JP11107740A
JP552145A
JP8294618A
JP200080954A
JP11343836A

Attorney, Agent or Firm:

Koji Nagato

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