| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce a processing load on fuel pressure detection concerning a fuel injection control of an internal combustion engine. <P>SOLUTION: Injector IJn includes a sensor Sn for detecting the fuel pressure of a fuel intake port and a control IC 31. The control IC 31 includes: a means 41, 43 for controlling a gain to be used when the fuel pressure detected by the sensor Sn is converted into an analogue sensor signal and an offset potential of a sensor signal; an AD convertor 55 AD-converting the sensor signal; and a controller 37. The controller 37 sets as detection range of the fuel pressure, a limited detection range narrower than the maximum change range of the fuel pressure and including the current value of the fuel pressure, further sets the gain and the offset potential at which the sensor signal is changed in a AD convertible predetermined voltage range when the fuel pressure is changed in the set limited detection range, and the controller 37 calculates the fuel pressure based on the AD-converted sensor signal value and the set limited detection range and transmits calculated data to a device for controlling the injector IJn. <P>COPYRIGHT: (C)2012,JPO&INPIT |
