| 摘要 |
PROBLEM TO BE SOLVED: To provide a solenoid valve control device for giving a longer life beyond a conventional limit to a duty solenoid valve. SOLUTION: The solenoid valve control device applies overexcitation voltage corresponding to power voltage to a coil 6 of the solenoid valve in an overexcitation period at the initial stage of a duty drive-on period, and applies holding voltage lower than the overexcitation voltage to the coil 6 in a remaining holding period of the duty drive-on period. Herein, a control circuit 21 is provided for lowering an effective value for the overexcitation voltage by providing effective chopper control in the overexcitation period. COPYRIGHT: (C)2006,JPO&NCIPI
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