| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel injection valve which can enhance detection accuracy of the operational state of a needle valve. <P>SOLUTION: The fuel injection valve 1 includes a body 2 having a nozzle 11 and a needle valve 36 for controlling the injection and non-injection of the fuel from the nozzle 11, and further includes a magnet 40 to be reciprocated together with the needle valve 36 and a coil 41 for generating the voltage by the reciprocation of the needle valve 36. A processing circuit 50 for detecting the operational state of the needle valve 36 by processing the voltage generated in the coil 41 is connected to the fuel injection valve 1. The processing circuit 50 has a coil voltage detection circuit 59 for detecting the magnet temperature correlation value correlated to the temperature of the magnet 40, a first inversion amplifier 64 for correcting the voltage generated in the coil 41 by the operation of the needle valve 36 based on the correlation value detected by the circuit 59, and an integrator 56 for detecting the operational state of the needle valve 36 from the voltage corrected by the amplifier 64. <P>COPYRIGHT: (C)2012,JPO&INPIT |
