Cushman, Darby & Cushman
Fuel pump driving apparatus
 In a fuel pump driving apparatus for a vehicle engine including a fuel injection system, the selection of a plurality of energizing circuits each formed by the combination of two or all of three brushes of a fuel pump drive motor is effected in accordance with the load conditions of the engine, thereby changing the rotational speed of the motor and hence the fuel quantity delivered from the fuel pump. When the occurrence of a fault in one of the energizing circuits is detected, the driver is informed of the occurrence of the fault and in addition a faulty-condition controller controls switching means in such a manner that the drive motor is energized through another one of the energizing circuits. 
Nippondenso Co., Ltd.
F F F
F02D F02M F02M
inventional inventional additional
Hirotada Katsushi Yoshifumi Toshio
Yamada Kato Ina Kondo