Closed loop fuel control system with hysteresis
US5435290A · kind A · utility
8Cited by
10References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1993 |
| Grant date | Jul 25, 1995 |
| Priority date | — |
| Expiry date | Dec 6, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/1493
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A closed loop fuel control system for controlling air/fuel ratio in response to exhaust gas oxygen signals includes a selective hysteresis function to prevent high frequency switching after a noise spike. This improves fuel control system noise protection without introducing permanent time delays.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.