Fuel injector with two-stage booster
US7484673B2 · kind B2 · utility
14Cited by
2References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 13, 2005 |
| Grant date | Feb 3, 2009 |
| Priority date | — |
| Expiry date | May 28, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2200/704
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel injector for an internal combustion engine has a nozzle needle that opens or closes at least one injection opening. At an end oriented away from the at least one injection opening, the nozzle needle has a step-shaped widening, which forms an end surface oriented toward the at least one injection opening. The end surface, an end surface of a first booster, and an end surface of a second booster delimit one side of a control chamber; an actuator moves the first booster and the second booster into or out of the control chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.