Control device for a catalyst having an electric heater

Details Control device for a catalyst having an electric heater Control device for a catalyst having an electric heater

1992-08-31

1993-11-02

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

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

60300, 12317921, 219205, F01N 328

Patent

active

052575012

ABSTRACT:
A control device for a catalyst having an electric heater: provided at an exhaust pipe of an engine, having a catalyst for purifying exhaust gas and an electric heater for heating the catalyst before and after starting the engine comprises a battery charged by a generator driven by the engine for supplying power to the electric heater and for driving a starter; a current sensor for detecting charged and discharged current of the battery; summing means for summing a value of the charged and discharged current since a current to the electric heater has started flowing until the engine starts operating and until the engine stops operating; and means for comparing the summed value with a predetermined value and for prohibiting the current flowing to the electric heater during a period at least before the engine starts operating when the summed value is equal to or less than the predetermined value.

REFERENCES:
patent: 4102127 (1978-07-01), Saiki
patent: 5094198 (1992-03-01), Trotta
patent: 5109151 (1992-04-01), Demizu
patent: 5138987 (1992-08-01), Schmid
patent: 5146743 (1992-09-01), Maus
patent: 5163290 (1992-11-01), Kinnear

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