| 摘要 |
<P>PROBLEM TO BE SOLVED: To change over drive current of a flow rate regulating valve by an existing signal without modifying an interface between a control device and a driving device. <P>SOLUTION: A decoder 15 of an EDU 7 outputs a drive signal Dn to an injector driving circuit 16 when an injection signal IJTn of any one of cylinders comes into an injection instruction state. Further, when injection signals IJT1-IJT4 of all cylinders are simultaneously 1 (injection instruction state) while an engine is in a decelerating state without injection, a current changeover signal SC is set to 1 to decrease a current detection resistance value of a current detection resistor circuit 39. Since a drive control circuit 45 sets a drive signal S2 to 1 and drives a transistor 32 to be ON until detection voltage of a voltage detection circuit 46 reaches a predetermined threshold value, the drive current when an electromagnetic coil PC starts up increases. <P>COPYRIGHT: (C)2013,JPO&INPIT |
