Unit injector for an internal combustion engine
US4782807A · kind A · utility
46Cited by
5References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 12, 1987 |
| Grant date | Nov 8, 1988 |
| Priority date | — |
| Expiry date | Aug 12, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2200/502
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A unit injector for an internal combustion engine comprising a spill valve provided between a pressurizer unit and a nozzle unit. The spill valve, driven through a hydraulic amplification link by a piezoelectric actuator, slides in a cylindrical passage that transversely intersects a fuel supply path between the pressurizer unit and the nozzle unit to open and shut a spill port opening from the cylindrical passage into a return path. Fuel injection quantity is determined by opening the spill valve at a preselected point in the injection stroke of a reciprocating plunger in the pressurizer unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.