Exhaust gas recirculation system having a solenoid duty compensation circuit for an internal combustion engine
US4233947A · kind A · utility
15Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 9, 1979 |
| Grant date | Nov 18, 1980 |
| Priority date | — |
| Expiry date | Jul 9, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The duty cycle of a driving pulse signal applied to an electromagnetic valve which controls the recirculation rate of the exhaust gas of an internal combustion engine, is compensated for by a compensation signal produced in accordance with the difference of the voltage of the power supply and a predetermined voltage so that the actual working period of the electromagnetic valve is adjusted optimally irrespectively of the deviation of the voltage of the power supply from the predetermined voltage, thereby providing the most suitable recirculation rate of the exhaust gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.