Air-fuel ratio controller of internal combustion engine

Details Air-fuel ratio controller of internal combustion engine Air-fuel ratio controller of internal combustion engine

1989-03-08

1990-08-14

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Fuel injection system

204406, F02D 4114

Patent

active

049478192

ABSTRACT:
The invention relates to an air-fuel (A/F) ratio controller of an internal combustion engine, which is provided with a constant-voltage circuit between the heater for heating the A/F ratio sensor and the power-supply source. Regardless of variation of voltage outputted from the power-supply source, the A/F ratio controller securely maintains the heater voltage constant and prevents occurrence of error in the signal outputted from the A/F ratio sensor by correctly operating the oxygen-concentration detecting element whose measuring precision is solely dependent on temperature.

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patent: 4332225 (1982-06-01), Cox et al.
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patent: 4765298 (1988-08-01), Kojima et al.
patent: 4873642 (1989-10-01), Mieno et al.
patent: 4889098 (1989-12-01), Suzuki et al.
patent: 4895123 (1990-01-01), Uchinami et al.

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