Power plants – Internal combustion engine with treatment or handling of... – Material from exhaust structure fed to engine intake
Patent
1996-02-13
1998-03-31
Hart, Douglas
Power plants
Internal combustion engine with treatment or handling of...
Material from exhaust structure fed to engine intake
60285, 60301, 60311, F01N 320, F02M 2506
Patent
active
057325545
ABSTRACT:
In the exhaust gas purification device of the present invention, a NO.sub.x absorbent is disposed in the exhaust gas passage of a diesel engine. At the time when NO.sub.x should be released from the NO.sub.x absorbent, a control circuit of the engine reduces the excess air ratio of the engine, and switches the combustion mode of the engine from the normal diesel combustion, in which diffusive combustion is dominant in the combustion chamber of the engine, to the combustion mode in which pre-mixture fuel combustion is dominant. By doing this, it is possible, even in a diesel engine, to reduce the excess air ratio in combustion to thereby make the air-fuel ratio of the exhaust gas lower than or equal to the stoichiometric. Thus, the regeneration of the NO.sub.x absorbent can be performed even when it is applied to a diesel engine.
REFERENCES:
patent: 4841936 (1989-06-01), Takahashi
patent: 5119780 (1992-06-01), Ariga
patent: 5172550 (1992-12-01), Takeshima
patent: 5233830 (1993-08-01), Takeshima
patent: 5473887 (1995-12-01), Takeshima
Iguchi Satoshi
Katoh Kenji
Sasaki Shizuo
Hart Douglas
Toyota Jidosha & Kabushiki Kaisha
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