Air/fuel ratio control system equipped with a temperature sensor

Details Air/fuel ratio control system equipped with a temperature sensor Air/fuel ratio control system equipped with a temperature sensor

1979-05-02

1981-06-23

Myhre, Charles J.

Internal-combustion engines

Charge forming device

Fuel injection system

123440, 123489, 123491, 60285, F02D 500

Patent

active

042743818

ABSTRACT:
An air/fuel ratio control system equipped with a temperature sensor fail-safe system for an internal combustion engine, comprises an engine parameter detecting circuit for the estimation whether the engine coolant temperature sensor is normal or not, a constant voltage supply, and a switching circuit for transmitting the constant voltage to a control signal generator, in place of the output signal of the engine coolant temperature sensor, the control signal generator generating a control signal in accordance with various engine parameters including the engine temperature for the control of the air/fuel ratio of an air/fuel mixture supplied to the engine, thereby providing the control signal generator with a suitable signal when a failure occurs in the engine coolant temperature sensor to prevent undesirable operation.

REFERENCES:
patent: 3834361 (1974-09-01), Keely
patent: 3906207 (1975-09-01), Rivere et al.
patent: 4052968 (1977-10-01), Hattori et al.
patent: 4132193 (1979-01-01), Takase et al.
patent: 4202301 (1980-05-01), Early et al.

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