Exhaust gas recirculation system
US6609506B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2001 |
| Grant date | Aug 26, 2003 |
| Priority date | — |
| Expiry date | Sep 5, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M26/50
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A recirculation exhaust gas extracted from the exhaust passage of an internal combustion engine and flowing through a recirculation passage. A recirculation control valve (6) controls the flow of the recirculation exhaust gas in the recirculation passage. A recirculation pipe (7) forming the recirculation passage has a hot or contact section (7c, 7e) extending near and along an exhaust manifold (1). The recirculation pipe (7) and the exhaust manifold (1) are covered with a heat-insulation cover (10). The drop of the temperature of the recirculation exhaust gas flowing through the recirculation passage is suppressed and the deposition of deposits including carbon in the recirculation control valve (6) is suppressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.