Exhaust gas recirculation control system
US5690083A · kind A · utility
7Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 21, 1996 |
| Grant date | Nov 25, 1997 |
| Priority date | — |
| Expiry date | Oct 21, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An EGR control system provides on-line adaptation of the EGR valve Start to Open value during normal vehicle operations. The adaptive logic determines whether the valve position output signal reaches a predetermined minimum output signal value within a desired predetermined time window defined by upper and lower time values. If outside the window, the initial duty cycle value applied to the EGR valve is increased or decreased as appropriate to force the output signal to reach the minimum value within or at the boundaries of the time window.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.