Flow rate control mechanism for use in exhaust gas re-circulating system
US4027635A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1975 |
| Grant date | Jun 7, 1977 |
| Priority date | — |
| Expiry date | Apr 8, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M26/36
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A flow rate control mechanism for use in controlling the flow rate of exhaust gases in an exhaust gas re-circulating system of an internal combustion engine. This mechanism includes a swirl flow chamber having a circular cross section, a first nozzle and a second nozzle, the former of which is open through the inner wall of the swirl flow chamber therein in the direction normal thereto and the latter of which is open through inner wall of the swirl flow chamber therein in the direction tangential thereto. The latter nozzle is positioned close to the opening of the former or first nozzle. The first nozzle directed in the normal direction extracts part of exhaust gases through an exhaust manifold, while the second nozzle directed in the tangential direction is communicated with atmosphere. The opening of the first nozzle is close to the opening of the second nozzle, so that the pressure at the opening of the first nozzle approximates the atmospheric pressure. As a result, the flow rate of exhaust gases which having been extracted through the exhaust manifold and fed into the flow rate control mechanism will be proportional to the square root of the exhaust gas pressure. On the other …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.