Closed loop system equipped with a device for producing a reference signal in accordance with the output signal of a gas sensor for internal combustion engine
US4167925A · kind A · utility
27Cited by
11References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1977 |
| Grant date | Sep 18, 1979 |
| Priority date | — |
| Expiry date | Dec 23, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/1456
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A reference signal with which the output of a gas sensor is compared is produced by detecting the maximum and minimum values of the output of the gas sensor and adding via a voltage divider these values to each other. The variation of the reference signal may be limited with predicted maximum and minimum values of the output of the gas sensor. The reference signal produced in such a manner may be utilized for disabling and reactivating the feedback control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.