Intermittent swirl type injection valve
US4629127A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1984 |
| Grant date | Dec 16, 1986 |
| Priority date | — |
| Expiry date | Sep 5, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An intermittent swirl type injection valve having a spray angle, capacity coefficient and fuel spray travel distance set so that the valve produces optimum engine operating conditions, with the spray angle, capacity coefficient and fuel spray travel distances being determined taking into account the gap area A.sub.c, the spray hole diameter d.sub.e, and the area A.sub.g of tangential passages in the valve. The injection valve includes a valve body and a valve needle slidably fitted in a valve hole formed in the valve body. A spray hole in the valve body merges with a valve seat provided at an end of the valve hole, and the spray hole is shaped to receive the lower end of the valve needle. Tangential passages swirl the fuel when the needle valve leaves the valve seat to open the valve to spray fuel substantially conically through the spray hole. The injection valve is designed so as to satisfy the following conditions: EQU .alpha.=20.degree. to 75.degree., EQU d.sub.e =0.3 to 1.2 mm, and ##EQU1## where .alpha. is the spray angle of the fuel and .theta. is the angle between the central axis of the tangential passages and the central axis of the valve needle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.