Common rail injector with regulated pressure chamber
US9228550B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 11, 2013 |
| Grant date | Jan 5, 2016 |
| Priority date | — |
| Expiry date | Aug 1, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2200/304
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A needle type fuel injector has a needle control chamber at a pressure subject to a control valve in a control valve chamber which in an opening phase is lifted from its seat to expose the control valve chamber, connecting passages, and needle control chamber to a low pressure drain and in a closing phase is urged against the seat to isolate the control valve chamber, connecting passages, and needle control chamber from the drain. Resistance to the flow or displacement of fuel through the control valve seat is provided by a pressure regulating valve as the control valve rapidly closes against its seat, thereby reducing the rate of closure and thus the impact of the control valve on the seat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.