| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel injection control system capable of detecting a deviation from the reference value of a signal transmission characteristic value in a signal transmission channel of a fuel pressure signal on the side of an electronic control device which inputs the fuel pressure signal. <P>SOLUTION: The microcomputer 33 of an ECU 11 which controls an injector IJn having a fuel pressure sensor 27 transmits a request for outputting the existing voltage different from an output voltage VS (fuel pressure signal) instead of the output voltage VS of the sensor 27 to the injector IJn by means of communication via a communication line 41. Then, on the injector IJn, an input voltage to an output circuit 57 for outputting the fuel pressure signal to a sensor signal line 29 is switched to a voltage corresponding to the request by a multiplexer 55. Then, the microcomputer 33 detects a deviation from the reference value of the signal transmission characteristic value on the signal transmission channel 59 constituted of the output circuit 57 and a terminal 58 on the injector IJn side and the sensor signal line 29. <P>COPYRIGHT: (C)2013,JPO&INPIT |
