Apparatus for restricting discharge of evaporated fuel gas
AssigneeHonda Giken Kogyo Kabushiki Kaisha (Honda Motor Co., Ltd.)
InventorsTakeaki Nakajima, Hideo Watanabe
Life of this patent
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Abstract
A fuel tank to be mounted on a vehicle and a canister are connected together via a two-way valve and a solenoid valve. Both valves are disposed within a valve casing which has a pair of connecting ports for connection to the fuel tank and to the canister, respectively. A bypass passage, which bypasses the two-way valve, to bring the two connecting ports into fluid communication with each other is provided inside the valve casing, and a solenoid valve is interposed in the bypass passage.
Claims9
Apparatus for restricting discharge of evaporated fuel gas from a fuel tank comprising:
- a fuel tank;
- a canister;
- fluid conduit means connecting said fuel tank to said canister;
- a valve casing disposed in said fluid conduit means, said valve casing having a pair of connecting ports for connection to said fluid conduit means leading to said fuel tank and said fluid conduit means leading to said canister, respectively;
- a first fluid passage between said connecting ports internally of said valve casing;
- a two-way valve in said first fluid passage, said two-way valve comprising a positive-pressure valve and a negative-pressure valve combined into a unitary arrangement in a manner complementary to each other such that when one of the positive-pressure and negative-pressure valves opens, the other closes;
- a second fluid passage between said connecting ports internally of said valve casing, said second fluid passage by-passing said two-way valve in said first fluid passage, and
- a solenoid valve in said second fluid passage.
Apparatus for restricting discharge of evaporated fuel gas from a fuel tank comprising:
- a fuel tank;
- a canister;
- fluid conduit means connecting said fuel tank to said canister;
- a valve casing disposed in said fluid conduit means, said valve casing having a first connecting port for connection to said fluid conduit means leading to said fuel tank and a second connecting port for connection to said fluid conduit means leading to said canister;
- a two-way valve provided internally of said valve casing;
- a first fluid passage internally of said valve casing and leading from said first connecting port to said two-way valve;
- a second fluid passage internally of said valve casing and leading from said second connecting port to said two-way valve;
- a third fluid passage providing fluid communication between said first and second fluid passages internally of said valve casing, said third fluid passage bypassing said two-way valve;
- said two-way valve being located more distant from said first and second connecting ports than said third passage;
- and
- a solenoid valve in said third fluid passage.
Apparatus for restricting discharge of evaporated fuel gas from a fuel tank comprising:
- a fuel tank;
- a canister;
- fluid conduit means connecting said fuel tank to said canister;
- a valve casing disposed in said fluid conduit means, said valve casing having a first connecting port for connection to said fluid conduit means leading to said fuel tank and a second connecting port for connection to said fluid conduit means leading to said canister;
- a first fluid passage between said connecting ports internally of said valve casing;
- a two-way valve in said first fluid passage;
- a second fluid passage between said first and second connecting ports internally of said valve casing, said second fluid passage by-passing said two-way valve in said first fluid passage;
- a solenoid valve in said second fluid passage;
- said solenoid valve having a valve member movable to a position closing said second fluid passage;
- means on one side of said valve member biasing said valve member to said closed position;
- and
- said first connecting port providing fluid pressure to said second fluid passage on a side of said valve member opposite from said biasing means;
- whereby said fluid pressure assists in opening said valve member against said biasing means.
Dependencies are inferred from the claim text.