Hydraulic pressure control device and vehicle control device

A hydraulic pressure control device comprising:

• a mechanical pump configured to discharge oil by driving of an engine of a vehicle;
• a hydraulic path configured to supply the oil discharged by the mechanical pump to a clutch;
• a clutch pressure control valve arranged on the hydraulic path and configured to control a clutch pressure, which is a hydraulic pressure to be supplied to the clutch;
• a selection valve arranged on a downstream of the clutch pressure control valve of the hydraulic path and configured to select the clutch to supply the oil from the hydraulic path;
• an accumulator configured to accumulate oil supplied by the mechanical pump and discharge the accumulated oil to supply to the clutch;
• a first oil path connected to the hydraulic path at an upstream side of the clutch pressure control valve;
• a second oil path connected to the hydraulic path at a downstream side of the selection valve;
• a connection control unit configured to control a connection between the accumulator and the hydraulic path to communicate the accumulator to either one of the first oil path and the second oil path;
• and
• a third oil path configured to supply the oil supplied by the mechanical pump to a back pressure side of the accumulator.