| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve reliability in the operation of a solenoid valve by preventing the simultaneous current carrying of various transistors for controlling the direction of the current carrying of a driving coil of the solenoid valve. <P>SOLUTION: A control part 34 has a detection means 62 for deciding signal forms of a first driving command signal and a second driving command signal, a first current carrying control means 64a for outputting a first control signal Sc1 for turning on a first switch and turning off a second switch when the decided signal form indicates current carrying into one direction for the driving coil, a second current carrying control means 64b for outputting a second control signal Sc2 for turning off the first switch and turning on the second switch when the signal form indicates current carrying into the other direction for the driving coil, and a third current carrying control means 64c for outputting a third control signal Sc3 for turning off both of the first and second switches when the signal form indicates current carrying into one direction and the other direction for the driving coil. <P>COPYRIGHT: (C)2007,JPO&INPIT |
