| 摘要 |
PROBLEM TO BE SOLVED: To provide the hydraulic pressure controller of an automatic transmission capable of preventing time-lag in timing at gain switching by switching gain without incurring complex structure and growth in size. SOLUTION: Interruption of hydraulic pressure inputted in a brake B3 allow a switch valve 60 to switch an oil path. Thus, a feedback pressure is not inputted into a second feedback chamber 45 and a second feedback chamber 55 during a low speed step in which an oil pressure is inputted in the brake B3. As a result, the oil pressure which is raised by gain switching is inputted into a clutch C3 or the brake B2 from a control valve 41 or a control valve 51. Meanwhile, a feedback pressure is inputted in the second feedback chamber 45 and the second feedback chamber 55 during a high speed step in which no oil pressure is inputted in the brake B3. As a result, the oil pressure which is not raised by gain switching is inputted into the clutch C3 or the brake B2 from the control valve 41 or the control valve 51. COPYRIGHT: (C)2006,JPO&NCIPI |
