Exhaust gas recirculation control system with atmospheric pressure compensation valve
US4450824A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1982 |
| Grant date | May 29, 1984 |
| Priority date | — |
| Expiry date | Sep 30, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2026/004
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a diesel engine exhaust gas recirculation system wherein an exhaust gas recirculation control valve operated by an operating air pressure controls the flow resistance of the exhaust gas recirculation passage according to variation of the operating air pressure effected by an operating air pressure control valve according to the load on the engine so as to replace most of the excess air part of the intake air by recirculated exhaust gases, an atmospheric pressure responsive air pressure control valve is provided so as to supply an air pressure which has been beforehand controlled so as to compensate for such changes of atmospheric pressure as caused by changes of altitude to the operating air pressure control valve as an operating air pressure source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.