Nissan Motor Company Limited

Nifco Inc.

Masami Honma

Takashi Hashimoto

Katsumi Morohoshi

Toshihide Kimisawa

Hiroshi Kumagai

Mitsuo Yamada

Tsuyoshi Kato

Kazumasa Kurihara

Yasutomo Kobayashi

Katsunori Ozaki

Junichi Hanai

Kei Orita

Tomoyuki Sato

Tomoyuki Satou

A fuel tank connector for connecting a fuel tank and a pipe in communicating fashion includes a gas barrier member made of a synthetic resin and having a gas barrier property. The gas barrier member includes a tubular portion and a flanged portion provided on a peripheral side of the tubular portion, which extends beyond an opening of the fuel tank. The gas barrier member is made of a liquid crystal polymer, aromatic polyamide, a blended polymer of an ethylene-vinyl alcohol copolymer and high-density polyethylene, a blended polymer of polyamide and polyethylene, or a blended polymer of polyamide and high-density polyethylene.

Fuel tank connector

A fuel hose for an automotive vehicle has an end section to which a connection-partner member is to be fitted. The fuel hose comprises an innermost layer formed of rubber or synthetic resin. The innermost layer has an inner surface defining an opening through which fuel flows and has an end section corresponding to the end section of the fuel hose. An outer layer is formed outside the innermost layer and formed of a material lower in fuel permeability coefficient than the innermost layer. Additionally, an end covering material is formed covering a surface region of the innermost layer which surface region includes the inner surface at a part extending from a sealing position to an end face of the innermost layer and the end face of the innermost layer. The end covering material is lower in fuel permeability coefficient than the innermost layer.

Fuel hose and producing method therefor

A welded structure constituted of a fuel filling container having an opening, and a welded part including a pipe-shaped section whose one end is disposed in the opening of the fuel filling container. A welding section is fixedly disposed around the outer periphery of the pipe-shaped section. The welding section is welded through a welding surface to the outer surface of the fuel filling container. In the welded structure, the welding section of the welded part includes a welding strength providing layer and a fuel permeation resistance layer which are coaxial with the pipe-shaped section of the welded part and radially laminated to define the annular welding surface. Additionally, at least an inner peripheral surface portion of the pipe-shaped section and an outer peripheral surface portion of the other end portion of the pipe-shaped section are formed of a fuel permeation resisting material.

Welded structure of fuel filling container and welded part, and welding method therefor

A chamber structure is provided which is able to flow down fuel smoothly at a desired flow rate. A chamber main body is fixed onto an inner bottom 1a of a fuel tank of a vehicle, and a suction port of a fuel pump is inserted into an inside of the chamber main body. A through hole is formed in a peripheral wall of the chamber main body. A fuel tank side through hole for connecting an inside of the fuel tank and a negative pressure chamber being connected to the first through hole is arranged in a vicinity of the inner bottom of the fuel tank. An inlet port for passing return fuel into the inside of the fuel tank is faced to the negative pressure chamber. A recirculation funnel which has an upper end opening directed to the inside of the chamber main body at a position lower than an upper edge of the chamber main body is formed to extend upward from the negative pressure chamber. A peripheral length of the upper end opening of the recirculation funnel is set longer than that of the lower edge opening of the recirculation funnel directed to the negative pressure chamber.

Chamber structure

A fuel chamber provided in a fuel tank for an automotive vehicle in order to effectively prevent a temperature of a fuel within a fuel tank from ascending not so as to generate a vapor due to a fuel returned to the fuel chamber end from an engine is mainly disclosed. In a typical fuel chamber, a fuel chamber main body, a jet nozzle member having a front end portion inserted into a hole portion communicating an inner portion with an outer portion of the fuel chamber main body, a cover body forming a pressure reduction chamber decompressed in response to that the jet nozzle member injects a return fuel to the fuel chamber main body through the hole portion, and a tubular circulating member circulating a fuel within the fuel chamber main body are provided. The fuel stored within the fuel tank is introduced into the fuel chamber main body and the fuel within the fuel chamber main body is circulated in response to that the jet nozzle member injects the return fuel into the fuel chamber main body.

Fuel chamber for automotive vehicle

The fuel tank system comprises a tank body for containing fuel therein, a canister for disposing said fuel component, a filler tube connected with the tank body and forming a channel for supplying fuel to the tank body, a vent side check valve having a first chamber and a second chamber separated by a diaphragm, a signal tube connecting the first chamber of the vent side check valve with the upper part of the filler tube, a vent side tube for connecting the tank body with the canister via the second chamber of the vent side check valve and for introducing a gaseous body containing fuel component in the tank body to the canister via the second chamber when filling fuel, and an orifice for the signal tube, provided on the upper part of the signal tube on the filler tube side and having such an inside diameter and a length that may prevent the fuel permeation into the signal tube side from the filler tube side. Therefore, by the functions of the orifice, the permeation of the fuel into the signal tube can be controlled thus to maintain the functions of the vent side check valve.

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Yokohama, Japan

Masami Honma