Three-step exhaust gas recirculation control system
US4280470A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 11, 1979 |
| Grant date | Jul 28, 1981 |
| Priority date | — |
| Expiry date | Dec 11, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B3/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An exhaust gas recirculation control system for particular application to a diesel engine, which has an exhaust gas recirculation control valve, and a means for actuating the exhaust gas recirculation control valve, which positions the exhaust gas recirculation control valve selectively and steppedly at one of three states, that are: a first state in which it provides substantially zero exhaust gas recirculation ratio, a second state in which it provides a medium exhaust gas recirculation ratio, and a third state in which it provides a maximum exhaust gas recirculation ratio, according to the load on the engine, so that the valve is steppedly shifted from the third state toward the first state via the second state as engine load increases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.