Emergency fuel line closure
AssigneeChrysler Corporation
InventorThomas Tucker Coddington
Life of this patent
Estimating the term…
Abstract
An automobile engine driven fuel pump operates to cause alternate fuel pumping and fuel vacuum cycles in a fuel pumping chamber and concurrent alternate air vacuum and air pumping cycles respectively in an air pumping chamber and also to maintain a normally closed fuel control valve open in the fuel supply conduit to the pump during the fuel vacuum and air pumping cycles completely independently of the fuel pumping cycles. If the engine stalls, as for example in the event of a collision or automobile roll-over, the pump will stop and the control valve will close to prevent fuel leakage from the supply conduit. Pressure in the supply conduit also urges the control valve to its closed position.
Claims22
In combination with an engine, a fuel system comprising, a fuel pump having a fuel pumping chamber and an air pumping chamber and driven by said engine to effect alternate fuel pumping and fuel vacuum cycles in said fuel pumping chamber and concurrent air vacuum and air pumping cycles respectively in said air pumping chamber, said fuel pumping chamber having fuel inlet means in communication with a fuel supply for said engine to receive fuel therefrom only during the fuel vacuum cycles and having fuel outlet means for discharging said fuel for use by said engine during the fuel pumping cycles, control valve means normally closing the communication between said fuel supply and inlet means, and control valve operating means independent of the fuel pressure in said fuel pumping chamber during said fuel pumping cycles and responsive to the pressure in at least one of said chambers during the alternate cycles for opening said control valve means to maintain the last named communication during operation of said pump.
Dependencies are inferred from the claim text.