| 摘要 |
PROBLEM TO BE SOLVED: To perform selection from the neutral range to the drive range in selecting in a short time without shock. SOLUTION: An operating oil pressure controller is provided with a precharge pressure adjusting means for forming precharging rack pressure to a starting friction clamping element by suddenly lowering operating oil pressure after temporarily and suddenly raising it when selection is performed from the neutral range to the drive range, and a capacity adjusting pressure adjusting means for forming capacity adjusting pressure of the starting friction fastening element by gradually raising operating oil pressure from the lowering time of precharge pressure. The operating oil pressure Pv (Pv1, Pv2) in the lowering time of precharge pressure by the precharge pressure adjusting means and the rising speedθt (θt1,θt2) of the operating oil pressure by the capacity adjusting pressure adjusting means are changed according to the braking state of a vehicle on which an automatic transmission is loaded. |
