Dual EGO sensor closed loop fuel control
US5115639A · kind A · utility
40Cited by
10References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 28, 1991 |
| Grant date | May 26, 1992 |
| Priority date | — |
| Expiry date | Jun 28, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B1/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Air/fuel ratio control for an internal combustion engine includes the use of a first exhaust gas oxygen sensor (EGO) upstream of a catalytic converter and a second exhaust gas oxygen sensor downstream of the catalytic converter. The output of the first EGO sensor is passed through a high pass filter and then combined in a summer with the output of the second EGO sensor. The output of the summer is applied to a proportional and integral controller which then provides an output used to generate the fuel control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.