Inactive state determining method of oxygen sensor for vehicle

Details Inactive state determining method of oxygen sensor for vehicle Inactive state determining method of oxygen sensor for vehicle

1996-06-28

1998-03-10

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

731181, 204401, F02D 4122, G01M 1900

Patent

active

057249539

ABSTRACT:
Disclosed is an inactive-state determining method of an oxygen sensor, including the steps of determining whether the oxygen sensor is in a condition where the oxygen sensor can be activated. It is determined whether an engine is in an idle state. A predetermined time is counted. It is determined whether electromotive force from the oxygen sensor is below a slice level even after the predetermined time is passed. An amount of fuel injected is increased by 20%. It is determined whether the electromotive force of the oxygen sensor is below the slice level even when the increased fuel is injected.

REFERENCES:
patent: 4980834 (1990-12-01), Ikeda et al.
patent: 5423203 (1995-06-01), Namiki et al.

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