Nippondenso Co., Ltd.

Junichi Tatsukawa

Kiyoshi Nagata

Yutaka Kawashima

Hisanori Kobayashi

In a fuel supply device for vehicles, a sub-tank is arranged within a fuel tank. At least one intake port is provided in a bottom wall of the sub-tank. A check valve is arranged at the intake port. A fuel pump is arranged within the sub-tank to supply fuel from the sub-tank to an engine. A fuel return pipe is provided through which a part of the fuel supplied through the fuel supply pipe is returned into the sub-tank. A jet pump is connected to the fuel return pipe so as to deliver the fuel within the fuel tank into the sub-tank through at least one suction port of the jet pump by using fluid energy of the fuel returned into the sub-tank. A pipe is connected to a fuel discharge port of the jet pump, and extends to an upper location within the sub-tank. The jet pump is constituted by a groove forming a flat fluid control device arranged between the fuel pump and the bottom wall of the sub-tank. The groove is formed therein with the fuel suction port and the fuel discharge port of the jet pump.

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Okazaki, Japan

Junichi Tatsukawa