Boost device bypass valve
US5586744A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 1995 |
| Grant date | Dec 24, 1996 |
| Priority date | — |
| Expiry date | May 11, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7782
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A wastegate valve for use with turbocharged engines. The wastegate valve vents exhaust gasses upstream of the turbocharger high pressure turbine to reduce turbocharger speed and associated boost pressure. The wastegate valve includes a piston attached to a poppet valve and movable within a housing. The housing receives pressurized intake gasses at a side of the piston to actuate the popper valve between open and closed positions. A diaphragm is sealingly disposed between the piston and housing. The housing includes mechanical stop means to limit the piston travel, thereby reducing flexure of the diaphragm. Additionally, the diaphragm is disposed in the housing in such a way that the diaphragm flexes between reduced peak compressive and tensile stresses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.