Fuel pump cutoff shuttle valve

Details Fuel pump cutoff shuttle valve Fuel pump cutoff shuttle valve

2006-10-17

2006-10-17

Moulis, Thomas (Department: 3747)

Internal-combustion engines

Charge forming device

With fuel pump

C123S457000, C123S510000, C137S112000, C137S265000

Reexamination Certificate

active

07121266

ABSTRACT:
A fuel pump cutoff shuttle valve is located between a multiple fuel pump arrangement. The valve has a first tubular member with a hollow, biased sliding member inside that moves according to the fuel pressures of the pumps. The fuel that flows through the valve member passes out through a valve member central orifice so that the fuel can flow into the second tubular member en route to an engine. When the fuel pressure in a pump greatly exceeds that of another pump on the opposite side of the valve member, the valve member moves and places the valve member central orifice adjacent to the interior wall of the first tubular member, stopping the flow of fuel. Alternatively, the valve member may have an orifice at each end of the valve member to permit a reduced flow of fuel to the engine when fuel is not supplied by the central orifice.

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