Fuel injection pump for internal-combustion engines
US5050558A · kind A · utility
Inventors
Key dates
| Filing date | Nov 16, 1987 |
| Grant date | Sep 24, 1991 |
| Priority date | — |
| Expiry date | Nov 16, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In the proposed fuel injection pump of the radial-piston pump type, the fuel injection rate can be controlled exactly by means of an electrically controlled valve which monitors a relief channel (66) of the pump working space (53) and which, by means of its closing time, determines the period of high-pressure injection during the pump-piston feed strokes. In order utilize the total length of the flanks of the drive cams as efficiently as possible, additionally injection adjustment is carried out as a result of the rotation of an essentially stationary part (13, 33) of the cam drive of the pump pistons (37) of the fuel injection pump relative to the rotary-driven part (8,9) of this cam drive. At the same time, on a fuel injection pump with a rotary-driven cam ring (9), there is a separation between a roller-carrying part (13) and a part (33) carrying pistons (37). However, these parts are then coupled to one another via a coupling arm (39), and the piston-carrier part (33) carrying the pistons (37) is thus free of transverse forces subjecting its mounting to stress.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.