Dual fuel injector
US5887799A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 11, 1997 |
| Grant date | Mar 30, 1999 |
| Priority date | — |
| Expiry date | Sep 11, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/30
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A dual fuel injector for an engine is selectively controlled to either inject a liquid fuel such as gasoline or a gaseous fuel such as butane or propane to the engine. The injection of one fuel or the other is effected by alternatively feeding a pulsating voltage of one polarity or he other to the coil of an electrically controlled injector. The injector has a permanent magnet armature which is driven in one direction in response to pulses fed to its surrounding coil of one polarity and the opposite direction in response to pulses fed to the coil of the other polarity. When the armature is driven in a first direction, it drives a pintle attached thereto in that direction. The pintle in turn drives against a spring urged valve to open this valve, thereby permitting gasoline to pass through the control injector from where it is injected into the engine in a pulsating manner. When the armature is driven in an opposite direction, it drives a pintle in this same opposite direction against a second spring urged valve to open this valve to permit pulsating gaseous fuel to pass through the injector to the engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.