Device for controllably heating oxygen sensor

Details Device for controllably heating oxygen sensor Device for controllably heating oxygen sensor

1983-07-06

1985-09-03

Cox, R. B.

Internal-combustion engines

Charge forming device

Having fluidic logic control means

73 23, 204431, F02B 300, F02B 3300

Patent

active

045385750

ABSTRACT:
Pulse current having a certain cycle is supplied to an electric heater in an oxygen sensor for exhaust gas. Duty ratio of this pulse current is controlled in relation to the amplitude of voltage and current applied to the heater to thereby maintain power consumption of the heater per unit time at a constant one. Also this duty may be corrected on the basis of parameters for running an internal combustion engine.

REFERENCES:
patent: 3868846 (1975-03-01), Kushida
patent: 3948081 (1976-04-01), Wessel
patent: 4198939 (1980-04-01), Masaki
patent: 4328780 (1982-05-01), Andrew
patent: 4332225 (1982-06-01), Cox
patent: 4354468 (1982-10-01), Sone
patent: 4365604 (1982-12-01), Sone

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