Air-fuel ratio control method and its apparatus
Patent
·
OSTI ID:6434614
An apparatus for controlling an air-fuel ratio of a combustion engine with a memory device for storing correct values for airfuel control in accordance with an intake condition of said combustion engine and a rotation speed of the same. In the apparatus, an air-fuel ratio represented by the exhaust gas composition of the internal combustion engine is sensed and the sensed value is integrated. When the integrated value from the integrator fails within a predetermined range of values, one of the correction values for the air-fuel ratio control is corrected in accordance with a current condition of the internal combustion engine. When the integrated value falls outside the predetermined range, the correction values are replaced by a predetermined reference value and an air-fuel ratio of mixture supplied to the combustion engine is controlled in accordance with the correction values for the air-fuel ratio stored.
- Assignee:
- Nippondenso Co Ltd. (Japan)
- Patent Number(s):
- US 4345561
- OSTI ID:
- 6434614
- Country of Publication:
- United States
- Language:
- English
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