Rotary diesel electric EGR valve
US5531205A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1995 |
| Grant date | Jul 2, 1996 |
| Priority date | — |
| Expiry date | Mar 31, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05C2201/021
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An EGR valve is well-suited for use in a diesel engine by employing a butterfly-type valve operated by a torque motor. Sealing of the butterfly blade to the wall of the passage through the valve body utilizes a sealing ring that is mounted in a groove of the passage wall. The blade and the sealing ring are self-aligned at assembly, and the groove is cooperatively defined by two body segments that are fitted axially together to capture the sealing ring. Two additional rings are used between the sealing ring and the sides of the groove. In certain embodiments, the axis of the passage in the vicinity of the groove is straight; in others, it has a 45 degree offset so that portions of the axis to opposite sides of the groove are non-collinear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.