Fuel injection valve
US6631854B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 9, 2001 |
| Grant date | Oct 14, 2003 |
| Priority date | — |
| Expiry date | Nov 30, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel injector (1), especially an injector for fuel injection systems of internal combustion engines (51), has a piezoelectric or magnetostrictive actuator (14), a valve-closure member (8) that is actuated by an actuator (14) using a valve needle (9), the valve-closure member cooperating with a valve seat surface (7) to form a sealing seat, and having at least one spray-discharge opening (10, 11) that is sealed by the sealing seat. In this context, the valve seat surface (7) and/or the valve-closure member (8) has partial areas (30a, 30b) that are arranged so as to be offset on the circumference, the partial areas throttling a fuel flow to differing extents as a function of a stroke of the valve needle (9).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.