Delivery valve
US5033506A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1990 |
| Grant date | Jul 23, 1991 |
| Priority date | — |
| Expiry date | Feb 9, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7939
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A delivery valve for controlling fuel flow from a fuel-injection pump to an internal combustion engine and comprising a seat member, a closing member movable relative to the seat member for controlling flow of fuel through the passage channel of the seat member, and a spring for biasing the closing member into engagement with a valve seat on the seat member. The closing member includes a return-flow collar sealingly displaceable in the passage channel and located outside of the passage channel in an open position of the delivery valve, and a control collar located closely adjacent to the return-flow collar. The control collar has a diameter corresponding to a diameter of the passage channel, a periphery and at least one recess formed on the periphery and extending along an entire length of the control collar. The one recess has a variable cross-sectional area defining with a delivery edge of the passage channel a connecting flow cross-sectional area between a working chamber of the fuel injection pump and a conduit for delvery fuel to the fuel injection point. The size of the variable cross-sectional area is so selected that the connecting flow cross-sectional area increases with a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.