Nippondenso Co., Ltd.

Takashi Inbe

Toshiaki Nakamura

Yoshifumi Ina

Yukio Kusakawa

A motor driven fuel pump adapted for use with a fuel injection system of an internal combustion engine has a pump housing and an impeller of regenerative pump type rotatably disposed in the housing and provided with circumferential rows of grooves formed in the opposite end faces of the impeller along the outer peripheral edges thereof. The housing is formed therein with suction and discharge ports and cooperates with the impeller to define a fuel pressurizing passage extending circumferentially of the impeller and surrounding the grooved outer peripheral section thereof. The fuel pressurizing passage is circumferentially interrupted by a partition wall disposed between the suction and discharge ports and extending radially inwardly into close contacting relationship to the outer peripheral section of the impeller to prevent flow of fuel from the discharge port toward the suction port. The discharge port is tangential to the fuel pressurizing passage to facilitate smooth flow of the pressurized fuel from the passage into the discharge port and reduce the amount of material required for the pump housing.

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Kariya, Japan

Takashi Inbe