Honda Motor Co., Ltd.

Nifco Inc.

Kengo Kobayashi

Shinya Murabayashi

Hiroaki Watanabe

Kiyofumi Shida

Takeaki Nakajima

Yutaka Utsumi

Daisuke Nohara

Seiji Yagura

Tamon Kimura

A wave suppression structure for a fuel tank is provided in which a wave suppression member () disposed in the interior of a tank main body of the fuel tank is formed from a basket-shaped container () and cylindrical porous members (), the basket-shaped container () being formed from two members, first and second half bodies (L,R), two of the porous members () being supported in the interior of each of the first and second half bodies (L,R), wherein the wave supporting member () is supported on a fuel suction pipe () by joining the first and second half bodies (L,R) of the basket-shaped container () so as to sandwich a fuel suction pipe () between a through hole () thereof. This enables attachment of the wave suppression member () to the fuel suction pipe () to be completed without carrying out a cumbersome operation of inserting the fuel suction pipe () through the through hole () of the basket-shaped container () or the interior of the porous member (), thereby greatly improving the ease of attachment.

Wave suppression structure for fuel tank

Provided is a fuel tank system wherein the liquid levels of fuel in two fuel storage portions can be equally maintained, and the fuel amount in each fuel tank can be estimated with a high degree of accuracy. The fuel tank system is provided with a fuel tank in which a main tank portion and a subsidiary tank portion are formed; a siphon tube which extends from the main tank portion to the subsidiary tank portion, to transfer fuel from one tank portion to the other tank portion; and an electronic control unit (ECU) for determining whether or not the fuel is transferred via the siphon tube (in the transfer state). The ECU determines that the fuel is in the transfer state when the change rate of a sender signal is equal to or less than a predetermined threshold value (VF_th).

Fuel tank system

A fuel introducing member is connected to an opening end of a siphon pipe forming a fuel tank. The fuel introducing member has an opening for introducing fuel within the tank, and the opening is formed in the upper surface of a cover section. A lid body is pivotably mounted to the upper surface. When the opening is above the level of fuel, the lid body closes the opening by the weight of the lid body, and when the opening is below the level of the fuel, the lid body floats in the fuel to open the opening. The opening is located below the upper end of the inner diameter of the opening end of the siphon pipe.

Fuel tank

A fuel introduction member is connected to an open end of a siphon tube which constitutes a part of a fuel tank. The fuel introduction member is provided with an opening through which a fuel is introduced from the tank into the siphon tube and from the siphon into the tank, a lid portion which is swung by the hydraulic pressure from the siphon tube so as to open the opening, and a float member which floats on the fuel in accordance with the rise of a fuel liquid surface in the tank to displace the lid portion in order to open the opening.

Growing community of inventors

Utsunomiya, Japan

Kengo Kobayashi