| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic control device for a vehicular automatic transmission for reducing thrust shock at the beginning of an inertia phase without increasing the thrust shock at a rack portion of the inertia phase. SOLUTION: Hydraulic pressure (2-4/B) on a 2-4 brake 2-4/B side being fastened is drained, hydraulic pressure P(H-C) is supplied to a hi-clutch H/C side being released, and a fastening condition is changed over from the 2-4 brake 2-4/B to the hi-clutch H/C. In this case, a pull-off pressure control portion 18 of an electronic control part 7 drives an accumulator control solenoid 32 to generate hydraulic pressure against torque fluctuation in the hydraulic pressure (2-4/B), which is temporarily increased for counterbalance first thrust shock of a vehicle G. Thus, the thrust shock of the vehicle G at the beginning of the inertia phase is reduced without increasing second thrust shock. COPYRIGHT: (C)2006,JPO&NCIPI |
