| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technique for contributing to reduction in power consumption of a low-pressure fuel pump, in a fuel supply system of an internal combustion engine including the low-pressure fuel pump which changes the operation number of impellers and a high-pressure fuel pump for increasing a pressure of fuel discharged from the low-pressure fuel pump. <P>SOLUTION: The low-pressure fuel pump includes: a first impeller which rotates in conjunction with a rotary shaft of an electric motor; a second impeller which relatively rotates to the rotary shaft of the electric motor; and a centrifugal clutch which is arranged between the rotary shaft of the electric motor and the second impeller. The pump is used to prevent an increase in power consumption with a change of the operation number of the impeller. <P>COPYRIGHT: (C)2012,JPO&INPIT |
