Piezoelectric fuel injection system with rate shape control and method of controlling same
US6912998B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2004 |
| Grant date | Jul 5, 2005 |
| Priority date | — |
| Expiry date | Mar 10, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2041/2034
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A piezoelectric fuel injection system and a method of controlling same, the system including a piezoelectric fuel injector having a piezoelectric element, a power source adapted to provide power to the piezoelectric element to actuate the piezoelectric fuel injector, and a controller adapted to cyclically modulate power provide to the piezoelectric element by the power source during at least a portion of the injection event. The controller cyclically modulates the power between a predetermined first voltage and a predetermined second voltage that is less than the first voltage to control the rate of fuel injected by the piezoelectric fuel injector during the portion of the injection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.