| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic control device enabling to suppress unintentional entry of hydraulic pressure into the other region even when undershoot occurs in an solenoid valve during control in one of output regions of the solenoid valve. SOLUTION: The hydraulic control device uses one linear solenoid (SLP) 201 for controlling hydraulic pressure to be supplied to a primary pulley 41 of a belt type continuously variable transmission 4 and hydraulic pressure to be supplied to a forward travel clutch C1 of a forward/reverse travel change-over device 3. A low hydraulic pressure side output region X1 and a high hydraulic pressure side output region X2 are set for the hydraulic pressure to be controlled by the linear solenoid (SLP) 201. Between the low hydraulic pressure side output region X1 and the high hydraulic pressure side output region X2, a non-use region X3 is set where controlled object is not controlled. COPYRIGHT: (C)2009,JPO&INPIT
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