| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel pressure sensor diagnostic device capable of determining an abnormality of a fuel pressure sensor. SOLUTION: The fuel pressure sensor diagnostic device includes: a metering control unit 3 which controls metering of a supply pump 103 so that the fuel pressure to be detected by the fuel pressure sensor 106 becomes a fuel pressure indicator value; and an abnormality determination unit 4 which determines abnormality of the fuel pressure sensor 106 when correlation between a present fuel pressure indicator value and the fuel supplied amount to a fuel rail 104 by the metering control is separated by a threshold value or more from correlation between a past fuel pressure indicator value and the fuel supplied amount to the fuel rail 104 by the metering control. COPYRIGHT: (C)2012,JPO&INPIT |
