Catalytic converter for a diesel engine

Details Catalytic converter for a diesel engine Catalytic converter for a diesel engine

1986-05-05

1987-06-16

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

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

55DIG30, 60299, 60311, 422180, 502527, F01N 302, F01N 328

Patent

active

046728090

ABSTRACT:
A catalytic converter for a diesel engine comprises a labyrinth made of metal foil. The foil is coated with an oxidation catalyst. When exhaust gas flows through the labyrinth, the gas is forced to make right-angle turns at intervals as short as about 5 mm. The number of right-angle turns can be as great as 30 turns per cubic centimeter of labyrinth. These abrupt turns cause particulates in the gas to be deposited on the foil. At intervals, fuel is injected into the exhaust gas. The fuel burns on the catalyzed surface and heats the converter sufficiently to burn the trapped particulates. In an alternative embodiment, there are two converters, and fuel is automatically injected into that converter which has more trapped particulates than the other, so as to burn the particulates trapped in that converter.

REFERENCES:
patent: 4058485 (1977-11-01), Cheung
patent: 4157929 (1979-06-01), Kubicek
patent: 4268482 (1981-05-01), Arashi
patent: 4530418 (1985-06-01), Cume
patent: 4576800 (1986-03-01), Retallick

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