Toyota Jidosha Kabushiki Kaisha

Jtekt Corporation

Kentaro Hioki

Shusuke Inagi

Toshihiko Shima

Akio Nakamura

Kenji Takahashi

Makoto Kojima

Ryosuke Okumura

The valve unit includes: a body having a charging passage; a supply-side joint that connects a supply pipe; and a check valve that is disposed in the gas passage, and that inhibits gas from being discharged from the gas tank to the outside of the body. The check valve includes a check valve seat, a check valve element that comes into contact with or moves away from the check valve seat, and a positioning member that fixes the position of the check valve seat in the charging passage. The body has a fitting hole which is communicated with the charging passage and in which the supply-side joint and the positioning member are fitted. The positioning member is fitted in a second fitting hole so as to fix the position of the check valve seat even when the supply-side joint has not been fitted in a first fitting hole.

Valve unit comprising a check valve device

A second protective member () is provided to cover a thin wall portion and its periphery of a second tank head section (), so as to protect the thin wall portion. The thin wall portion is a region of the second tank head section () in which a reinforcing layer () has a smaller wall thickness. The second protective member () has a double layer structure including an inner layer made of polyurethane and an outer layer made of a material mixture of polyurethane and expanded graphite. This structure suppresses the mass and the volume of a pressure vessel from being increased by the presence of a protective layer.

Pressure vessel and production method thereof

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Toyota, Japan

Kentaro Hioki