Exhaust purifying system for internal combustion engines

Details Exhaust purifying system for internal combustion engines Exhaust purifying system for internal combustion engines

1976-08-06

1978-10-03

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

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

F01N 315

Patent

active

041176758

ABSTRACT:
An exhaust purifying system for a multi-cylinder four-cycle internal combustion engine operating on an intake mixture leaner than stoichiometric employs first preliminary reaction chambers receiving exhaust gases from ports connected to cylinders having successive firing order. The exhaust gases are then delivered from said first preliminary reaction chambers to a single second preliminary reaction chamber and then to a catalytic reaction chamber containing oxidative catalysts of base metals, and then finally to an oxidative reaction chamber. The intake mixture for the engine is heated from exhaust gases in the oxidative reaction chamber. This particular succession of chambers causes the temperature of the exhaust gases to increase to above 800.degree. C.

REFERENCES:
patent: 3577727 (1971-05-01), Warren
patent: 3823555 (1974-07-01), Cole
patent: 3881316 (1975-05-01), Bunda
patent: 3911676 (1975-10-01), Jensen
patent: 3927525 (1975-12-01), Jacobs
patent: 3965881 (1976-06-01), Sakurai
patent: 3968645 (1976-07-01), Noguchi
patent: 3968648 (1976-07-01), Futamura

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