Double pulsing electronic unit injector solenoid valve to fill timing chamber before metering chamber
US5558067A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 1995 |
| Grant date | Sep 24, 1996 |
| Priority date | — |
| Expiry date | Aug 24, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M59/32
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An electronic fuel injector includes a metering chamber defined by a metering piston and the sides and bottom of a bore defined within the injector body, and a timing chamber defined by the metering piston, the bore sides and a timing plunger slidably disposed within the bore. A biasing spring is connected to opposing surfaces of the timing plunger and metering piston for biasing the metering piston away from the timing plunger. The metering chamber is in constant fuel communication with a pressurized fuel source and the timing chamber receives fuel from the fuel source according to the actuation of a solenoid actuated control valve disposed therebetween. A fueling strategy for such an injector requires actuating the control valve to substantially fill the timing chamber before filling the metering chamber, for subsequent injection into the engine, when the force of the biasing spring is at a minimum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.