| 摘要 |
PROBLEM TO BE SOLVED: To detect the disorder of a pressure sensor detecting a fuel supply path pressure in the downstream of a pressure regulator early with high precision by determining the disorder of a fuel pressure detection means in response to pressure change in a fuel supply path when the pressure fluctuation in the downstream of a throttle valve is detected. SOLUTION: In the operation of an engine 10, in an ECU 20, when an absolute pressure PBA in an intake pipe detected by an absolute pressure sensor 62 exceeds first predetermined value, the detected absolute pressure in the intake pipe is rewritten to the first predetermined value, and the detection value of an pressure sensor 54, a fuel pressure detection means, is also rewritten to the first predetermined value. The detected absolute pressure in the intake pipe is judged whether the same is less than third predetermined value or not, and when the judgement is YES, the detected intake pipe absolute pressure is rewritten to the third predetermined value, and the detection value of the pressure sensor 54, to fourth predetermined value respectively. When a fuel supply pressure is a predetermined value or less regardless of significant change of the absolute pressure in the intake pipe, the pressure sensor 54 is determined that disorder such as disconnection occurs.
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