| 摘要 |
A fuel pump (1) has an ECU (5) which carries out feedback control of the driving of a motor unit (30), and sets the number of rotations of an impeller (11) to a number of rotations which is in accordance with a target fuel pressure (S2). On the basis of a fuel pressure detected by a pressure sensor (7), the ECU (5) detects whether vapor was generated by fuel in a pump chamber (16) of the fuel pump (1) (S3). If vapor generation is detected (S3: YES), the ECU (5), for a predetermined period of time, sets the number of rotations of the impeller (11) so as to be higher than the target number of rotations determined by the feedback control, and thereby exhausts vapor in the pump chamber (16) and fuel paths (18, 19) to vapor exhaust holes (20) (S4, S5). Due to this configuration, vapor in the pump chamber (16) is exhausted out of the fuel pump (1) from the vapor exhaust holes (20). |
