Fuel injector nozzle assembly with feedback control
US6253736A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1999 |
| Grant date | Jul 3, 2001 |
| Priority date | — |
| Expiry date | Aug 10, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/063
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An injector is provided which includes a nozzle valve element, a control volume, and an injection control valve for controlling fuel flow from the control volume so as to control nozzle valve movement. Importantly, the injector includes a nozzle valve lift detecting device for detecting nozzle valve lift and providing a nozzle valve element lift feedback signal. In addition, an injection control valve member movement detecting device may be provided for detecting movement of the injection control valve member into open and/or closed positions and generating a control valve member position feedback signal. One or both of the feedback signals may be used for adjusting the timing and/or rate of opening of the injection control valve thereby controlling the timing and/or rate of opening of the nozzle valve element to control the timing and/or rate of fuel injection of subsequent injection events. The nozzle valve element lift detecting device includes positioning the injection control valve for contact by the nozzle valve element and a piezoelectric element for generating the feedback signal. A control device is used to process the feedback signal and adjust control of the injection co…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.