Fuel injection pump having variable prestroke mechanism
US4737086A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 1986 |
| Grant date | Apr 12, 1988 |
| Priority date | — |
| Expiry date | May 12, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M59/243
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel injection pump includes a reciprocating plunger and a control sleeve slidably fitted over the plunger, the prestroke of which is varied by vertical movement of the control sleeve. The control sleeve is provided at its upper end with a fuel discharge groove, through which the fuel contained in a fuel-pressurizing chamber is discharged after the end of injection. The control sleeve also has to pressure escape passage. A variation in the effective stroke allows the pressure of fuel contained in the fuel-pressurizing chamber to be selectively regulated by the pressure escape passage, thereby controlling the pressure of fuel to be injected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.