Exhaust gas recirculation system
US6192686A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1999 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Mar 22, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M26/28
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Past exhaust emission control systems fail to utilize exhaust gas recirculation during all operating parameters of an engine. The present exhaust gas recirculation system reduces the emissions emitted from an engine during all operating parameters of the engine. The engine has a flow of intake air being at a first preestablished pressure and a flow of exhaust gas being at a first preestablished pressure being less that said first preestablished pressure of said intake air. The exhaust gas recirculation system is comprised of a portion of the flow of exhaust gas being recirculated to the cylinder and forming a flow of exhaust gas recirculation. The flow of exhaust gas recirculation is cooled. The flow of exhaust gas recirculation is compressed to a second preestablished pressure by a positive displacement pump. The second preestablished pressure of the flow of exhaust gas recirculation is at least equal to the first preestablished pressure of the intake air. A quantity of the flow of exhaust gas recirculation is controlled by an of-off valve or valves and/or a variable speed motor driving the positive displacement pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.