Toyoda Gosei Co., Ltd.

Fts Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Isuzu Motors Limited

Kabushiki Kaisha Toyota Chuo Kenkyusho

Toyota Gosei Kabushiki Kaisha

Tomohide Aoki

Masayuki Nakagawa

Hiroaki Kito

Hiroshi Nishi

Norihiro Yamada

Masami Mizuno

Takashi Ohta

Kenichiro Kaneko

Hisao Hanabusa

Natsushi Miura

Keiji Miyoshi

Osamu Hokari

Keisuke Yoshida

Hisatsugu Goto

Tamiyosi Ohasi

Masahiro Ando

Yukiharu Takeuchi

Yoshihiko Hyodo

Akane Okada

Takaaki Ito

Norio Sato

Katsuyuki Kido

Masao Yasukawa

Fujio Ninomiya

Eishin Mori

Tamiyoshi Ohashi

Masanori Nojiri

Tomokazu Hori

Tomohiro Sugizaki

Tomohisa Imaeda

Hideyuki Tsuzuki

Sukehiro Sawada

Toshiaki Asahara

Soji Hamaji

Yoshinari Yoshida

Tsugio Fujita

Masakiyo Yoshida

Nobutaka Morimitu

Shinobu Kagamiuchi

Katsumi Tanaka

Yasuyuki Washiyama

Takahisa Majima

An automotive fuel tank is provided in which a plurality of mounting members are provided on a built-in part which are fusion bonded to an inner surface of an outer wall of the fuel tank so as to attach the built-in part in place in the fuel tank. An abutment portion is formed on the mounting member which is brought into abutment with an inner surface of the outer wall of the fuel tank. The abutment portion has formed thereon an abutment surface which is made to tightly stick to the inner surface of the outer wall of the fuel tank and elongated projections which project from the abutment surface, whose cross section at their distal end portions is of triangular shape and which penetrate into an interior of the outer wall of the fuel tank, and a height of an apex of the elongated projection from the abutment surface is in the range of 30% to 70% of a thickness of the outer wall of the fuel tank.

Automotive fuel tank

A fuel tank capable of strongly fusion-bonding a built-in part to an inner surface of an outer wall thereof while protecting the outer wall even when an impact, etc. are applied thereto. In the fuel tank for a motor vehicle, which is formed by blow molding, in which the built-in part is mounted, and which has the outer wall composed of a synthetic resin, a plurality of mounting members adapted to mount the built-in part to the fuel tank are provided on the built-in part so as to be fusion-bonded to the inner surface of the outer wall of the fuel tank. An abutment portion is formed on each of the mounting members for contacting the inner surface of the outer wall of the fuel tank, and an abutment surface and a plurality of abutment pins, each projecting from the abutment surface, are formed in the abutment portion. The abutment pin is formed into a columnar or frustum-shaped configuration, each having a circular or elliptical cross-section, and a diameter or a main axis of a projecting end of the abutment pin along with the height of the abutment pin from the abutment surface are formed less than the thickness of the outer wall of the fuel tank.

Fuel tank for motor vehicle

A blow molding device capable of securely closing a lower end of a parison to prevent the parison from being crushed. The blow molding device includes a blow mold and a parison holding unit. The parison holding unit includes an inner holding plate adapted to be inserted in an interior of the lower end of the parison, and an outer holding plate adapted to hold an outer surface of the lower end of the parison, and the outer holding plate has a recess conforming to a configuration of the inner holding plate and is split into a plurality of holding plate members such that each of the split holding plate members is capable of sliding to hold the lower end of the parison.

Blow molding device

A fuel tank capable of attaching functional parts and tubes in an interior thereof. In a fuel tank for a motor vehicle, which is formed by blow molding for attachment of a built-in part in an interior thereof, and of which an outer wall composed of a synthetic resin has an opening, a functional part adapted to discharge fluid from the interior of the fuel tank or feed fluid therein is attached to the built-in part, a tube adapted to discharge fluid from the interior of the fuel tank or feed fluid therein is connected to the functional part, and a tube connector is attached to an end of the tube. A temporal holding connector is formed integrally with the built-in part, the tube connector is attached to the temporal holding connector, and after blow molding, the tube connector is detached from the temporal holding connector and is attached to a tank cap adapted to close the opening of the fuel tank.

An automotive fuel tank fabrication apparatus is provided. The automotive fuel tank has a blow mold and a built-in part holding unit. The built-in part holding unit includes a plurality of holding rods for holding a built-in part. The holding rods are made to freely advance and retreat in such a manner as to hold the built-in part in a position where the built-in part confronts cavities when the blow mold is opened and to retreat from the blow mold when the blow mold is closed with the built-in part left positioned in an interior of a parison. The holding rods are formed in such a manner that their diameters are reduced as they extend towards distal ends thereof and are inserted into insertion holes formed in the built-in part so as to hold the built-in part.

Automotive fuel tank fabrication apparatus

A fuel cutoff valve comprises a casing and a float mechanism having a float and a seat portion. An upper vent hole is formed in the upper wall portion of the float, and a side portion communication hole is formed in the side wall portion. The passage area of the side portion communication hole is set so as to allow a large volume of vapors entering the float chamber to escape into the valve chamber. The passage area of the upper vent hole is set so that vapor entering the float chamber when the vehicle inclines escapes into the valve chamber, and the float chamber fills with fuel lifting the float, whereas when the vehicle turns sharply, the float is lifted without the float chamber filling with fuel.

Fuel cutoff valve

A fuel cutoff valve of the invention attached to an upper portion of a fuel tank includes a casing, a first part supported by multiple legs, a second part, and a spring. The second part is located below the first part in a vertically movable manner and has multiple air holes formed in a top plate to communicate with a buoyancy chamber. When the fuel level in the fuel tank rises to submerge the second part and reach the first part, the first part rises by its buoyancy to close a connection conduit. In the event of an abrupt rise of the fuel level at a high increase rate, for example, by a sudden turn of the vehicle, the second part rises by the increased buoyancy of the buoyancy chamber by the air retained in the buoyancy chamber and presses the first part up to close the connection conduit. The fuel cutoff valve of the invention promptly closes in response to a heavy ruffle of the fuel level by a sudden turn of the vehicle, so as to prevent the outflow of the fuel from the fuel tank.

A welding jointfor a fuel tank reduces the amount of fuel vapor in the fuel tank that escapes into the atmosphere. The fuel tank welding jointa joint main bodyand a barrier layer laminated on the surface of the joint main body. The joint main bodyis formed of a first resin material weldable to the wall of the fuel tank FT, and the barrier layeris formed of a second resin material that is adhesively and chemically reactive with the first resin material and that is more fuel-impermeable than the first resin material. An end portionformed so as to be exposed to the outside at the end of a tube portionis formed on the barrier layer. When the barrier layeris injection molded on the surface of the joint main body, the end portionis formed by the flow of the second resin material through the end of the tube portionto increase the adhesive strength of the end face where the parts are joined.

Manufacturing method of fuel tank welding joint

A fuel valve comprises a first valve chamber and a second valve chamber within a casing, where a first valve mechanism and a second valve mechanism are housed in the respective valve chambers. A first float of the first valve mechanism rises when the fuel level reaches a first liquid level, to close a first connection conduit. The second valve mechanism rises to close a second connection conduit when a second liquid level, which is higher than the first liquid level is reached. A valve conduit, which acts as a restriction path, is provided between the first valve chamber and the second valve chamber. The valve conduit is formed with a conduit area that is less than that of the first connection conduit, so as to increase the pressure within the fuel tank when the first connection conduit is closed.

Fuel cut off valve

A fuel cut-off valveof the invention is attached to an upper portion of a fuel tank and connects and disconnects inside with and from outside of the fuel tank according to the fuel level in the fuel tank. In the fuel cut-off valveof the invention, a valve casingforms a first valve chestand a second valve chestconnected to the fuel tank and has an inter-valve chest flow passageconnecting the first valve chestto the second valve chestand a canister connection portconnecting the second valve chestto a canister placed outside the fuel tank. A first floatand a second floatare respectively located in the first valve chestand in the second valve chest. When the fuel level in the fuel tank rises to reach a preset first level FL, the first floatmoves up to close an openingand thereby close the inter-valve chest flow passage. When the fuel level in the fuel tank further rises to reach a preset second level FLthat is higher than the preset first level FL, the second floatmoves up to close an upstream end openingof the canister connection portand cut off the flow of fuel vapor to the canister. This arrangement of the invention effectively ensures the sufficient performances and the enhanced reliabilities of the leakage protection function and the backflow prevention function of the fuel cut-off valve.

Fuel cut-off valve

An apparatus is for inhibiting fuels from flowing out of fuel tanks, and includes a cover, a breather pipe, an upper case, a lower case, and a floating valve. The upper case is welded to the breather pipe in an airtight manner so as to form a chamber for holding the lower case, in which the floating valve is accommodated, therein. Moreover, the breather pipe is welded to the cover in an airtight manner. The apparatus not only obviates O-rings but also is downsized, because the upper case and the breather pipe are sealed by welding.

Apparatus for inhibiting fuel from flowing out of fuel tanks

A device includes a housing fixed to an upper wall of a fuel tank, and having a communication opening in communication with a canister, a float valve received within the housing and floating on a fuel, and the float valve moving upward and downward so as to close and open the communication opening, and a tubular member communicating with the housing, and extending downwardly from the housing into the interior of the fuel tank. The device has through holes of a small diameter which are disposed near an upper wall of the fuel tank, and when the liquid level of the fuel in the fuel tank reaches the lower end opening of the tubular member, a pressure within the fuel tank increases, whereby the filling-up of the fuel tank is detected. When the liquid level of the fuel abnormally rises, the float valve closes the communication opening.

Outflow-limiting device of fuel tank

Disclosed is a valve being attached to a fuel tank, the valve permitting a vaporized fuel to flow out and inhibiting a liquid fuel from flowing out. The valve includes a cover and a case. For example, the cover is bonded to an upper portion of a fuel tank, is independent of the fuel tank, and includes a connecting surface to be connected to the fuel tank and a flow-out passage in which a vaporized fuel flows out. The connecting surface has a connector portion formed of a resin exhibiting a good bondability to the fuel tank. The case is screwed to the cover, and includes an evaporator opening and a floating valve. The evaporator opening communicates with the flow-out passage. The floating valve opens or closes the evaporator opening.

Valve attached to fuel tank

A fuel cutoff valve comprises a casing, a cover having a cover supporting part for supporting an upper part of the casing, an O-ring disposed on an outer periphery of the casing, and a seal holding member. The seal holding part is constituted by a member made of a material having a high degree of shape stability, such as a polyamide, into which glass fibers are added. Further, the seal holding part is thermally welded to a welding end of a cover inner layer made of a modified polyamide.

Growing community of inventors

Aichi-ken, Japan

Tomohide Aoki