Idle circuit shut-off valve
US4347817A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 23, 1980 |
| Grant date | Sep 7, 1982 |
| Priority date | — |
| Expiry date | Oct 23, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S261/19
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for shutting off liquid flow such as fuel in a carburetor during certain sensed conditions, in which an adjustment is provided for further controlling the liquid at times when the liquid is not shut off. When used on a carburetor, idle fuel or injection water is shut off by a needle valve. The needle valve may be retracted to an "on" position. The "on" position is adjustable so as to provide a flow adjustment. Such an arrangement may be provided as an original design feature of a carburetor or may be added to existing carburetor designs, for example, as a kit. When used as an idle fuel shut-off, the needle valve is adjusted in the "on" position in a manner similar to conventional idle mixture adjustment using idle mixture adjusting screws. Thus, fuel in the idle circuit may be interrupted during engine deceleration, as detected by a high manifold vacuum condition, or during engine shut-off, as detected by an interruption in the engine's ignition circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.