Fuel injection pump for internal combustion engines
US4986728A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 27, 1988 |
| Grant date | Jan 22, 1991 |
| Priority date | — |
| Expiry date | Sep 27, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2200/30
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel injection pump has a housing (3) with a flange (5) and a bore (40) in which are arranged a sleeve (2) and a pump piston (1). A valve body (4) with a hollow core space (20) is located in an axial end portion of the sleeve (2). The valve body (4) has at both axial end portions (11, 12) hydraulic dampening means. In the zone of the top dead center of the pump piston (1), its head (13) cooperates directly with the axial end portion (11) of the valve body (4), actuating a valve seat (27). This valve seat (27) located between the valve body (4) and the sleeve (2) acts as a fuel intake and relief valve for the fuel delivery system. A fluid spring including a cylinder chamber (42) and an additional piston (44), as well as an actuating element (19), are located adjacent an axial end of the pump piston (1 ). The actuating element (19) is linked with a drive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.