Catalytic converter heater control system for internal combustio

Details Catalytic converter heater control system for internal combustio Catalytic converter heater control system for internal combustio

1992-05-05

1993-06-08

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Having means analyzing composition of exhaust gas

60277, 60286, 60300, F01N 320

Patent

active

052168808

ABSTRACT:
A catalytic converter heater control system for an internal combustion engine comprising a catalytic converter installed in the engine exhaust gas passage and having a small capacity section on its upstream side and a large capacity section on its downstream side. The system has a pair of oxygen sensors installed one on the upstream side and one on the downstream side of the catalytic converter, a heater installed on the small capacity reaction section for heating incoming exhaust gas, and an electronic control unit for operating the heater when the difference between the outputs of the oxygen sensors is smaller than a prescribed value.

REFERENCES:
patent: 3969932 (1976-07-01), Rieger
patent: 5101625 (1992-04-01), Sugino
patent: 5146743 (1992-09-01), Maus

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