Device for controlling heating of catalyst for purifying exhaust

Details Device for controlling heating of catalyst for purifying exhaust Device for controlling heating of catalyst for purifying exhaust

1992-11-20

1993-11-16

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Having means analyzing composition of exhaust gas

60277, 60284, 60286, 60300, 123691, 422174, F01N 320

Patent

active

052612309

ABSTRACT:
A device for controlling the heating of a catalyst arranged in the exhaust passage of an engine. When the engine is started, the catalyst is rapidly heated by the heater, and the time for which the power is supplied to the heater is increased as the degree of deterioration of the catalyst becomes greater, to thus increase the temperature of the catalyst to the activation temperature thereof when the power supply to the heater is stopped regardless of whether the catalyst is new or has deteriorated.

REFERENCES:
patent: 3723070 (1973-03-01), Houdry
patent: 3770389 (1973-10-01), Kitzner et al.
patent: 3886739 (1975-06-01), Lee
patent: 4102127 (1978-07-01), Saiki et al.
patent: 4622809 (1986-11-01), Abthoff
patent: 4698966 (1987-10-01), Distel
patent: 5146743 (1992-09-01), Maus

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