Fuel cutoff for better transient control
US5076236A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1990 |
| Grant date | Dec 31, 1991 |
| Priority date | — |
| Expiry date | Mar 19, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M57/021
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pressure-responsive spring-biased cutoff valve for an open nozzle unit fuel injector in an internal combustion engine is provided allowing for the selective operation of a given number of cylinders during an engine low load or idling speed condition for improved white smoke control. The fuel injector of the present invention includes an injector body having a central bore with a reciprocating injector plunger positioned therein to form an injection chamber. The injection chamber is supplied with fuel from a supply passage through a metering orifice with the fuel cutoff valve located in the supply passage upstream of and adjacent to the metering orifice and in close proximity to the injection chamber for a substantial reduction in the entry of combustion gases and other unwanted substances into the fuel supply.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.