| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel supply device capable of detecting abnormal conditions of a fuel pressure sensor early and precisely.SOLUTION: A fuel supply device comprises an ECU performing feedback control of the driving of an electric feed pump so that an actual fuel pressure detected by a fuel pressure sensor becomes a target fuel pressure when the fuel pressure sensor is not abnormal, estimating the fuel pressure on the basis of a driving current of the feed pump when the fuel pressure sensor is abnormal, performing the feedback control of the driving of the feed pump via an FPC so that the estimated fuel pressure becomes the target fuel pressure, and determining whether or not the fuel pressure sensor is abnormal. The ECU estimates the fuel pressure on the basis of the driving current of the feed pump when an air-fuel ratio of the exhaust gas exhausted from an engine is not the theoretical air-fuel ratio, and determines that the fuel pressure sensor is abnormal when the fuel pressure detected by the fuel pressure sensor diverges from the estimated fuel pressure. |
