Pressure relief valve
AssigneeRaval A.C.S. Ltd.
InventorsOmer Vulkan, Vladimir Olshanetsky, Paul Handy, Denis Kleyman
Life of this patent
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Abstract
A pressure relief valve (10, 70) is provided having a first tubing (14a) connectable to a fuel tank (62) and a second tubing (14b) connectable to a fuel vapor treating device (64), the pressure relief valve comprising: an externally actuated (hereinafter EA) valve (20) disposed between the first tubing (14a) and the second tubing (14b) and being configured for pulsed actuation by a controller (28) thereby allowing pulsed fluid flow through a primary port (18a) disposed between the first tubing (14a) and the second tubing (14b).
Claims22
A pressure relief valve, comprising:
- a first tubing connectable to a fuel tank of a vehicle, the vehicle including a vehicle computer;
- a second tubing connectable to a fuel vapor treating device,
- a controller, configured for receiving an actuation signal from the vehicle computer, wherein said controller is different from the vehicle computer, wherein said controller includes at least one circuit configured to generate a pulsed signal;
- an externally actuated (EA) valve disposed between the first tubing and the second tubing and being configured for pulsed actuation by said pulsed signal generated by said controller, thereby allowing pulsed fluid flow through a primary port disposed between said first tubing and said second tubing.
A fuel vapor system for a vehicle, the vehicle including a vehicle computer, the fuel vapor system comprising:
- a pressure relief valve having a first tubing connectable to a fuel tank and a second tubing connectable to a fuel vapor treating device;
- and
- an externally actuated valve having a controller configured for receiving an actuation signal from the vehicle computer, the externally actuated valve being disposed between said first tubing and said second tubing and being configured for pulsed actuation by said pulsed signal generated by the controller, thereby allowing pulsed fluid flow between said fuel tank and said fuel vapor treating device, wherein said controller is different from the vehicle computer, wherein said controller includes at least one circuit configured to generate a pulsed signal.
A pressure relief valve, comprising:
- a housing having a first tubing connectable to a first reservoir and a second tubing connectable to a second reservoir being open to the atmosphere;
- and
- an externally actuated valve disposed in said housing and comprising a controller configured for receiving an actuation signal from a vehicle computer, the externally actuated valve being configured for pulsed actuation by the controller, thereby allowing pulsed fluid flow between said first reservoir and said second reservoir, wherein said controller is different from the vehicle computer, wherein said controller includes at least one circuit configured to generate a pulsed signal that enables pulsed actuation of said externally actuated valve.
A method for evacuating fuel vapor from a fuel tank to a fuel vapor treating device, the method comprising:
- providing an externally actuated valve having a controller, an inlet port and an outlet port;
- coupling a first tubing between the inlet port of the externally actuated valve and the fuel tank of a vehicle, the vehicle including a vehicle computer, wherein said controller is different from the vehicle computer, wherein said controller includes at least one circuit configured to generate a pulsed signal which allows pulsed actuation of said externally actuated valve;
- coupling a second tubing between the outlet port of the externally actuated valve and the fuel vapor treating device;
- and
- the controller generating the pulsed signal configured for pulsed actuation of the externally actuated valve, thereby allowing pulsed fluid flow between the fuel tank and the fuel vapor treating device.
Dependencies are inferred from the claim text.