Automatic fuel shut off system for fuel-injected engines
In a fuel-injected internal combustion engine comprising a fuel injection system fed by a main fuel supply, the improvement is described wherein there is interposed between the fuel supply and the injection system an automatic fuel shut off valve system which comprises: (a) an air-tight reservoir having, (1) a fuel inlet disposed at its upper portion and connectable to a fuel line leading from the fuel supply for the engine, and (2) a fuel outlet disposed at the bottom of the reservoir and connectable to a fuel line leading to a fuel injection system; (b) a vertical conduit disposed within the reservoir and extending upwardly from the fuel outlet, the conduit having in its lower portion at least one fuel inlet vent providing communication from the interior of the reservoir outside the conduit to the fuel outlet; (c) ball valve means including a ball valve and a ball valve seat for sealing off the flow of fuel from the reservoir when the volume of the fuel therein falls to a predetermined smaller quantity, (d) bleed valve means to provide, on actuation, open communication between the exterior of the reservoir and the interior of the upper portion of the reservoir; and (e) pressure equalization means to enable, on actuation, equalization of pressure on both sides of the situs of the seal created by the ball valve means, without intake of air into the fuel injection system.
- Assignee:
- NOV; NOV-88-001159; EDB-88-072993
- Patent Number(s):
- US 4715345
- OSTI ID:
- 5384302
- Resource Relation:
- Patent File Date: Filed date 18 Jul 1985
- Country of Publication:
- United States
- Language:
- English
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