Venting fuel valve for diesel engine fuel supply system
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United States of America Patent
Stats
-
Jun 11, 1985
Grant Date -
N/A
app pub date -
Oct 28, 1982
filing date -
Oct 28, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A diesel engine fuel supply system having an injector pump, a fuel tank, a fuel inlet conduit between the fuel tank and the injector pump and a fuel return conduit between the injector pump and the fuel tank, a venting fuel valve including a valve body, an adapter for mounting the valve body on the injector pump, a fuel inlet on the valve body for receiving the fuel inlet conduit, a fuel outlet on the valve body for transmitting fuel to the injector pump, a vent in the valve body in communication with the atmosphere, a valve spool in the valve body movable to a first position for effecting communication between the fuel inlet and the fuel outlet to supply fuel to the injector pump while preventing venting of the fuel outlet to the atmosphere through the venting means, and the valve spool being movable to a second position for preventing communication between the fuel inlet and the fuel outlet and for effecting communication between the injector pump and the atmosphere to thereby vent the injector pump and prevent flow of fuel through the fuel return conduit to the injector pump when the injector pump is caused to operate, and an endless curvilinear groove in the valve spool for receiving a mating ridge on a key for turning the valve spool between the first and second positions.
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