Fuel control system having sensor verification dual modes
US4663717A · kind A · utility
4Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1984 |
| Grant date | May 5, 1987 |
| Priority date | — |
| Expiry date | Oct 19, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/1476
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a fuel control system for an internal combustion engine, high and low voltages are applied in succession to an oxygen sensor, the difference between currents generated successively by the sensor in response to the application of the voltages being detected and compared with a predetermined value. The ratio of air-fuel mixture is controlled as a function of the current generated by the sensor in response to the application of one of the high and low voltages when the difference is smaller than the predetermined value and controlled in an open loop mode when the difference is larger than the predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.