| 摘要 |
The invention provides a hydraulic control apparatus of an automatic transmission able to prevent a speed change shock without obstructing the improvement of fuel cost of a vehicle and compact formation of the automatic transmission. This hydraulic control apparatus of the automatic transmission has a hydraulic servo for controlling an engaging state of a clutch C-1 on the basis of supplied oil pressure, a linear solenoid valve for C-1 for outputting signal pressure by adjusting the oil pressure, a control valve for outputting control pressure provided by adjusting line pressure P L on the basis of the signal pressure of the linear solenoid valve for C-1, and a C-1 apply relay valve for inputting, selectively switching and outputting the control pressure and the line pressure P L to the hydraulic servo . An orifice for regulating the flow rate of the oil is arranged in an oil path g for inputting the line pressure P L to this C-1 apply relay valve. |
