Fuel injection system for an internal combustion engine
US6889661B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2002 |
| Grant date | May 10, 2005 |
| Priority date | — |
| Expiry date | Apr 12, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2200/505
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel injection system having a high-pressure pump and a fuel injection valve for each cylinder of the engine in which the pump has a work chamber, and the injection valve has a valve member movable in an opening direction counter to the force of a closing spring braced between the injection valve member and a displaceable storage piston that is acted upon, on its side remote from the closing spring, by the pressure in the pump work chamber. The storage piston is movable into a storage chamber counter to the force of the closing spring, and the deflection stroke motion of the storage piston is limited by a stop. The storage piston has one shaft portion of smaller cross section, disposed in an outset position in a connecting bore, and one portion of larger cross section disposed outside the connecting bore toward the pump work chamber, and upon the deflection stroke motion of the storage piston into the storage chamber, its shaft portion of larger cross section dips into the connecting bore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.