| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic controller for an automatic transmission for a vehicle capable of ensuring the necessary and sufficient hydraulic fluid needed respectively in a hydraulic control circuit for power steering and a hydraulic control circuit for controlling gear shifting independently from each other, with small power consumption. SOLUTION: As a hydraulic pump driving and controlling means 128 drives and controls an electric motor 50 to obtain a higher rotating speed Nopm of a rotating speed Nopbtm of a first hydraulic pump 52 to obtain the hydraulic fluid needed in the hydraulic control circuit for power steering 46, and a rotating speed Nopatm of a second hydraulic pump 54 to obtain the hydraulic fluid needed in the hydraulic control circuit 48 for an automatic transmission 12, the hydraulic fluid needed in each of the hydraulic control circuit for power steering 46 and the hydraulic control circuit for gear shifting control 48 independent from each other, can be sufficiently ensured with low power consumption. |
