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US 4,790,343 AGranted
Pressure regulator
AssigneeAisin Seiki Kabushiki Kaisha
InventorMasahiro Mochizuki
Life of this patent
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Abstract
A pressure regulator for regulating a pressure differential between a fuel pressure and an intake manifold vacuum, which includes a casing member, a diaphragm dividing the casing member into a vacuum chamber and a fuel pressure chamber, a valve member associated with the diaphragm, and a spring biasing the diaphragm and constructed of a material having a temperature-actuated shape memory alloy.
Claims3
A pressure regulator for regulating a pressure differential between a fuel pressure and an intake manifold vacuum, said regulator comprising:
- a casing member;
- a diaphragm dividing an interior portion of said casing member into a vacuum chamber connected with an engine intake manifold and a fuel pressure chamber connected with a branch conduit of a fuel supply conduit;
- a valve member being associated with said diaphragm and controlling fluid communication between said branch conduit and a return conduit connected with a fuel tank;
- and
- a coiled spring disposed in said vacuum chamber for biasing said diaphragm and constructed of a material having a temperature-actuated shape memory alloy, said coiled spring expanding to a predetermined shape at high temperature so as to increase a biasing force thereof, wherein said diaphragm is clamped between an upper retainer and a lower retainer;
- said lower retainer is provided with a centrally located aperture and having a disk shape;
- and wherein a metallic cylindrical member is interposed between said lower retainer and said casing member and is provided with a conduit member connected with said return conduit.
4 more elements
Dependencies are inferred from the claim text.