System for reducing emissions in catalytic converter exhaust sys

Details System for reducing emissions in catalytic converter exhaust sys System for reducing emissions in catalytic converter exhaust sys

1995-06-02

1999-02-09

Denion, Thomas E.

Power plants

Internal combustion engine with treatment or handling of...

Methods

60284, 60285, 60307, 60289, 123198F, F01N 300

Patent

active

058679820

ABSTRACT:
The invention relates to a system for reducing emissions in catalytic converter exhaust systems for an internal combustion engine. The invention comprises air-fuel mixture forming means for providing a mixture of air-fuel to the engine, a catalytic converter for purifying an exhaust gas mixture from the engine, and a control unit adapted for controlling the mixture forming means so that an excess of hydrogen is generated in the exhaust gas mixture during the start-up of the engine. According to the invention, the excess of hydrogen is maintained essentially unburnt within the catalytic converter so as to provide a short light-off time for the catalytic converter.

REFERENCES:
patent: 3800772 (1974-04-01), Gospodar
patent: 4007590 (1977-02-01), Nagai
patent: 4107921 (1978-08-01), Iizuka
patent: 5211011 (1993-05-01), Nishikawa
patent: 5465574 (1995-11-01), Ma
patent: 5490381 (1996-02-01), Becker
patent: 5501073 (1996-03-01), Miyashita
patent: 5517820 (1996-05-01), Kuroda
patent: 5519993 (1996-05-01), Rao
patent: 5577383 (1996-11-01), Kuroda
patent: 5584177 (1996-12-01), Oketani

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