Apparatus for controlling internal combustion engine

Details Apparatus for controlling internal combustion engine Apparatus for controlling internal combustion engine

1994-11-30

1996-11-26

Heyman, Leonard E.

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

60285, 60289, F01N 320

Patent

active

055773834

ABSTRACT:
An apparatus for purifying an exhaust gas emitted from an internal combustion engine, particularly, immediately after starting of the engine, includes a mechanism for reducing the time required to heat a catalyst converter to the activation temperature. The exhaust gas is passed through a preliminary catalyst close to the engine and then through a main catalyst downstream of the catalyst. The engine is operated with an air-fuel mixture which is richer than the amount indicated by the stoichiometric air/fuel ratio for a period of time from when engine is started until the main catalyst is heated to a temperature at which the catalyst can sufficiently perform its purifying capability. The preliminary catalyst is enabled to function at lower temperatures by combusting the exhaust gas which is generated during a rich air-fuel mixture condition. The main catalyst can be heated with the generated combustion heat, resulting in an enhancement in exhaust gas purifying capability.

REFERENCES:
patent: 3757521 (1973-09-01), Tourtellotte et al.
patent: 3791143 (1974-02-01), Keith et al.
patent: 3799134 (1974-03-01), Griese
patent: 3809743 (1974-05-01), Unland et al.
patent: 3943709 (1976-03-01), Holt
patent: 3949551 (1976-04-01), Eichler et al.
patent: 4165610 (1979-08-01), Iizuka et al.
patent: 4209981 (1980-07-01), Miyamori et al.
patent: 4274381 (1981-06-01), Abo
patent: 5007237 (1991-04-01), Muller
patent: 5050551 (1991-09-01), Morikawa
German Magazine: Grobman et al., ATZ Automobile-Technische Zeitschrift 75, 1973, 4, pp. 140-143.

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