Pressure compensated fuel injector with solenoid pumping
US9404459B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2014 |
| Grant date | Aug 2, 2016 |
| Priority date | — |
| Expiry date | Sep 27, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M57/027
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method includes: filling a chamber having a recirculating valve, a piston, a cap valve, an injector valve and an injection orifice with a liquid by closing the injector valve and circulating the liquid from a source through the recirculating valve and the cap valve; then isolating the chamber from the source by closing the recirculating valve and the cap valve then allowing pressure within the chamber to follow a cylinder pressure by mechanically coupling the cylinder pressure into the chamber; and energizing an injector coil with electric current that pulls a solenoid assembly in an upward direction opening the injector valve, further motion of the solenoid assembly drawing the piston upward, wherein liquid in the chamber is compressed by the piston to a higher pressure than the cylinder pressure, which has the effect of injecting an electronically controlled stream of liquid out of the chamber through the injection orifice.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.