Compensation for inherent fluctuation in output level of exhaust sensor in air-fuel ratio control system for internal combustion engine
US4120269A · kind A · utility
15Cited by
1References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 19, 1976 |
| Grant date | Oct 17, 1978 |
| Priority date | — |
| Expiry date | Aug 19, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B1/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a feedback control system for maintaining the air-fuel ratio of a combustible mixture fed to an internal combustion engine at a preset ratio, a fluctuation in the output characteristic of an exhaust sensor due to deterioration or low temperature is compensated for by varying a reference voltage, which serves as a standard of comparison, in response to a change in a maximal value of the sensor output voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.