Fuel injection device with oil seal
US6138643A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 1999 |
| Grant date | Oct 31, 2000 |
| Priority date | — |
| Expiry date | May 3, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M59/366
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a fuel injection device with an oil seal in which a fuel tank is not soiled by a lubricating oil and a lubricating oil consumption amount is a little. Accordingly, the fuel injection device is provided with a fuel returning annular groove (20) provided between an upper surface of the housing (13) and the pressure chamber (15) and on an inner periphery of the plunger hole (14) and further communicated with the fuel tank, and an oil seal (40) provided between the housing (13) and the plunger (11), thereby preventing a lubricating oil on the upper surface of the housing after lubricating the cam from entering into the fuel returning annular groove.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.