Pressure valve for fuel injection pump
US4628957A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1984 |
| Grant date | Dec 16, 1986 |
| Priority date | — |
| Expiry date | Nov 27, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7777
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Disclosed is a pressure valve connectable between a fuel injection pump and the fuel injection valve of an internal combustion engine. The valve includes a cylindrical valve closing member which moves due to the pressure of fuel from the pump and expells a quantity of fuel to the injection valve. A throttling passage is provided as a bypass to the closing member and guarantees a stable pressure in the fuel supply conduit when the closing member is in open position. To neutralize reflected pressure waves in the supply conduit after injection the valve closing body is delayed by the throttling passage during its return movement into closing position. In addition, a check valve is arranged in the closing member which controls the stable pressure to a desired value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.