Hydraulic control device

A hydraulic control device including, between a first pump and a hydraulic operation unit of a transmission, a second pump and a check valve connected in parallel and configured to supply first oil from the first pump to the hydraulic operation unit through the check valve, or pressurize the first oil that is supplied from the first pump with the second pump and supply the first oil that has been pressurized to the hydraulic operation unit as second oil,

• the first pump being a mechanical pump configured to be driven by an engine of a vehicle including the transmission,
• the second pump being an electric pump configured to have a smaller capacity than that of the first pump and to be driven by a motor that rotates by power supplied from a power generator that generates power by a rotation of the engine, and
• the hydraulic control device comprising:
• a workload calculation unit configured to calculate an amount of workload cut in the first pump when supply of the first oil from the first pump to the hydraulic operation unit through the check valve is switched to supply of the second oil from the second pump to the hydraulic operation unit;
• a workload determination unit configured to determine whether an amount of workload loss based on an amount of power generated by the power generator is more than the amount of workload cut;
• and
• a motor controller configured to stop the motor or decrease a rotation number of the motor if the workload determination unit determines that the amount of workload loss is more than the amount of workload cut.