| 摘要 |
Provided is an abnormality detection apparatus for a fuel supply system that can reliably detect an abnormality of the fuel pressure changing operation of the fuel supply system, comprising a fuel pump unit (11) to supply a fuel to an injector (3), a pressure regulator (20) capable of regulating a pressure of the fuel to a desired one set pressure and a set pressure changing operation mechanism (40) to change the set pressure, a state change detection section (51a) to change the set pressure to a high set pressure in response to a fuel supply amount to the injector (3) being substantially constant and to detect a variation of an energization state of the pump drive motor (11m) after changing the set pressure, and an abnormality determination section (51b) to determine whether or not there is an abnormality occurred in changing the set pressure. |
