Fuel injector with piezoelectric actuator preload
US7140353B1 · kind B1 · utility
41Cited by
16References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2005 |
| Grant date | Nov 28, 2006 |
| Priority date | — |
| Expiry date | Jun 28, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M63/0031
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An piezoelectric actuated injector is provided which includes a nozzle valve element, a control volume, and an injection control valve including a control valve member for controlling fuel flow from the control volume so as to control nozzle valve movement. Importantly, the injector includes a preload chamber positioned along an injection control valve member for receiving high pressure fuel. The high pressure fuel acts on the injection control valve member to apply a preload force to supply a preload force to the stack of piezoelectric elements thereby ensuring more accurate control over fuel injection timing and metering.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.