COMBINED METERING VALVE AND PRESSURE REGULATING VALVE
First Claim
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1. A valve element combining a metering function and a pressure regulating function comprising:
- a valve housing housing a metering valve, said metering valve being movable by a control to meter an amount of fluid delivered from an inlet to an outlet; and
a pressure regulating valve, said pressure regulating valve being received within the valve housing and being supplied with a pressure delivered into said inlet on a first face, and a pressure downstream of said outlet on a second face, and said pressure regulating valve acting to regulate the pressure difference between the inlet and outlet
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Abstract
A valve element combines a metering function and a pressure regulating function. A valve housing houses a metering valve. The metering valve is movable by a control to meter an amount of fluid delivered from an inlet to an outlet. A pressure regulating valve is received within the valve housing and is supplied with a pressure delivered into the inlet on a first face, and a pressure downstream of the outlet on a second face. The pressure regulating valve acts to regulate the pressure drop across the metering valve to ensure accurate fluid metering.
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Citations
12 Claims
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1. A valve element combining a metering function and a pressure regulating function comprising:
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a valve housing housing a metering valve, said metering valve being movable by a control to meter an amount of fluid delivered from an inlet to an outlet; and a pressure regulating valve, said pressure regulating valve being received within the valve housing and being supplied with a pressure delivered into said inlet on a first face, and a pressure downstream of said outlet on a second face, and said pressure regulating valve acting to regulate the pressure difference between the inlet and outlet - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A fuel supply system comprising:
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a pump for delivering fuel to an outlet, said outlet communicating with a valve housing, said valve housing including an inlet to deliver fluid from the pump into a valve chamber; a metering valve movable within said valve chamber, said metering valve being positioned by a control to move a land, said land metering the amount of fluid from said inlet passing through an outlet; a pressure regulating valve movable relative to said metering valve, and within said valve chamber, said pressure regulating valve controlling the amount of fluid passing from said inlet to a bypass outlet, and said pressure regulating valve being biased by a pressure downstream of said inlet in said vale chamber on a first face, and a pressure downstream of said outlet on an opposed face, with a spring further biasing said pressure regulating valve in combination with said downstream pressure. - View Dependent Claims (10, 11, 12)
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Specification