Fuel injection valve with vortex chamber occupying auxiliary valve
US4120456A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1976 |
| Grant date | Oct 17, 1978 |
| Priority date | — |
| Expiry date | Dec 3, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M61/18
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The vortex chamber (11) of a fuel injection valve is occupied by a stepped, spring biased auxiliary valve (13) disposed in a cylindrical recess (8a) in a passage member (7) at the completion of each injection cycle. This seals the nozzle opening (14) and expels any residual fuel from the vortex chamber in preparation for the next injection cycle. The auxiliary valve (13) is raised by the injection pressure acting on its downwardly facing, circular shoulder. Alternatively, the auxiliary valve may be made integral with the main needle valve (29) in the form of a truncated conical tip (27a) on the end of an axial stem portion (27), the tip extending through and occupying a vortex chamber above a valve seat (26) at the end of each injection cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.