| 摘要 |
PROBLEM TO BE SOLVED: To narrow the operation region of an electric oil pump while avoiding supply shortage of hydraulic oil.SOLUTION: A hydraulic oil supply device includes a mechanical oil pump which is rotatively driven in linkage with a vehicle speed and the electric oil pump which is rotatively driven with energization control. Since a rotor speed MN of the mechanical oil pump is reduced in a low vehicle speed region, when the rotor speed MN falls below an operation threshold value EPon, th electric oil pump is driven to cover the mechanical oil pump. The operation threshold value EPon to be used for controlling the electric oil pump is set to be great during a sudden deceleration when a vehicle acceleration is great, and set to be small during a slow deceleration when the vehicle acceleration is small. Thus, during the sudden deceleration, the operation of the electric oil pump can be promoted to avoid the supply shortage of the operating oil, and during the slow deceleration, the operation of the electric oil pump can be inhibited. |
