Toyoda Gosei Co., Ltd.

Takuro Iino

Hiroaki Kito

Yoshihiro Sakata

A casingof fuel shutoff valveincludes a housinghaving a partition partwith a communication hole, the partition partdividing the inside of the casing into an upper space CU and a lower space CL, a check valve casesupporting a check valve structure, and a cutoff valve casestoring a float. The casingincludes a communication passage Cconnecting a space Cstoring the floatand a space Cin the check valve caseand having a delivery openingof the cutoff valve case, the communication hole, and a reception openingof the check valve case. The reception openingdeviates relative to the delivery opening. The check valve caseincludes an additional flow path part Callowing the circulation of fuel vapor, together with the communication hole.

Fuel shutoff valve

A first casing has an internal cylindrical region defined as a floating/sinking guiding region for a float valve. The wall that forms the cylindrical region includes ventilation windows. A second casing surrounds the first casing to form, about the periphery of the first casing, a ventilation passage that guides fuel vapor in a fuel tank to the ventilation windows through a region that surrounds the first casing. In addition, the second casing surrounds the first casing from a first connection hole side to form, about the periphery of the first casing, a first ventilation passage that guides the fuel vapor in the fuel tank to the ventilation windows through the region that surrounds the first casing, and a second ventilation passage that has a larger passage cross-sectional area than the first ventilation passage. These ventilation passages stabilize floating/sinking operation of the float.

Fuel valve

A check valve for fuel tank comprises a joint that is fixed to a fuel tank, a passage forming part, and a valve member. The joint is connected to one end of the passage forming part, and an outlet is formed at the other end of the passage forming part. The valve member that opens and closes the outlet. The valve member comprises a valve element, a spring bearing part, a holding part continuous to at least one of the joint and the passage forming part, and a compression coil spring. The joint and the passage forming part are communicated to each other to form a fuel passage. At the end on the joint side of the passage forming part in the fuel passage, there is formed a diameter enlarged portion having an inner diameter gradually increasing from a fuel supply pipe side toward the outlet side.

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Kiyosu, Japan

Takuro Iino