Fuel injection valve
US4288037A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 3, 1979 |
| Grant date | Sep 8, 1981 |
| Priority date | — |
| Expiry date | Dec 3, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M69/047
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel injection valve is proposed that serves for low-pressure fuel injection into the intake manifold of a mixture-compressing, externally ignited internal combustion engine. The fuel injection valve (1) includes a valve needle (12,12") which opens against the force of a closing spring (22), and this valve needle has downstream of the valve seat (16, 16") a fuel guidance cone (17, 17', 17") which tapers in the direction of fuel flow. The fuel guidance cone (17,17', 17") is so disposed that it projects into an air chamber (26) of the fuel injection valve (1) connected to an air line (9). The fuel guidance cone (17, 17', 17") may be embodied either conically or with a surface which extends in a concave manner and tapers tangentially toward the conical tip (29, 29'). An embodiment of a fuel injection valve (1) of this kind with a fuel guidance cone (17, 17', 17"), even lacking an air envelope during full-load or during the transition from idle to full-load assures the formation of a focused fuel jet without dampening the wall of an ejection nozzle (28) provided in alignment with the valve needle (12,12") on the fuel injection valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.