| 摘要 |
A hydraulic control apparatus of an automatic transmission. The 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<SUB>L </SUB>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<SUB>L </SUB>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<SUB>L </SUB>to this C- 1 apply relay valve. |
