System of abnormality detection for oxygen concentration sensor

Details System of abnormality detection for oxygen concentration sensor System of abnormality detection for oxygen concentration sensor

1987-03-27

1988-02-16

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Fuel injection system

123489, F02D 4114

Patent

active

047248157

ABSTRACT:
A system of abnormality detection for an oxygen concentration sensor employed to sense the oxygen concentration in engine exhaust gas for obtaining data to control the air/fuel ratio of a fuel mixture supplied to the engine. In which, the oxygen concentration sensor includes a sensor cell element, an oxygen pump element each formed of a pair of electrodes which sandwich a solid electrolytic member, and a heater element for heating the solid electrolytic member. The system functions to detect an abnormality of the heater element on the basis of the value of a voltage developed between the electrodes of the sensor cell element and an air/fuel ratio compensation value that is derived by sensing the exhaust gas oxygen concentration.

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