Fuel control system having sensor verification dual modes

Details Fuel control system having sensor verification dual modes Fuel control system having sensor verification dual modes

1984-10-19

1987-05-05

Lall, Parshotam S.

Boots, shoes, and leggings

123440, 123489, 204406, G01N 2756, F02M 5100

Patent

active

046637176

ABSTRACT:
In a fuel control system for an internal combustion engine, high and low voltages are applied in succession to an oxygen sensor, the difference between currents generated successively by the sensor in response to the application of the voltages being detected and compared with a predetermined value. The ratio of air-fuel mixture is controlled as a function of the current generated by the sensor in response to the application of one of the high and low voltages when the difference is smaller than the predetermined value and controlled in an open loop mode when the difference is larger than the predetermined value.

REFERENCES:
patent: 4366039 (1982-12-01), Uchida et al.
patent: 4497296 (1985-02-01), Nakajima et al.

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