HYDRAULIC CONTROL DEVICE FOR AUTOMATIC TRANSMISSION

摘要

PROBLEM TO BE SOLVED: To prevent deterioration in hydraulic output characteristics by vibration of a linear solenoid valve 24 due to generation of judder caused by stick slip of a hydraulic connection element 8 in a hydraulic control device for controlling oil pressure of the hydraulic connection element 8 provided in an automatic transmission. SOLUTION: To an oil passage 24b to input output oil pressure of the linear solenoid valve 24 to the pressure regulating valve 21, an accumulator 25 is connected. Oil pressure fluctuation transmitted through the pressure regulating valve 21 to the oil passage 24b due to generation of judder is absorbed by the accumulator 25.