Fuel system
AssigneeGoodrich Control Systems Limited
InventorDaniel Bickley
Life of this patent
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Abstract
A fuel system comprises a spill valve 38 operable to relieve the fuel pressure differential across at least one positive displacement pump 16, 18, a shut-off valve 32 operable to control the supply of fuel to an engine 84, and a two stage servo-valve 62 operable to control the operation of the shut-off valve 32, the spill valve 38 having a control chamber 40 the fluid pressure within which is controlled so as to be held at an intermediate level during engine shut-down.
Claims8
A fuel system comprising a spill valve operable to relieve the fuel pressure differential across at least one positive displacement pump, a shut-off valve operable to control the supply of fuel to an engine , and a two stage servo-valve operable to control the operation of the shut-off valve, the spill valve having a control chamber, and spill control means operable to control the fluid pressure within the control chamber so as to hold the fluid pressure at an intermediate level during engine shut-down.
Dependencies are inferred from the claim text.