High Clutch Accumulator

High Clutch Accumulator

Outline
^ The high clutch accumulator locks the high clutch smoothly. Also, when shifting up to third gear and shifting down from third gear, the high clutch accumulator controls the locking and releasing timing of the high clutch. Moreover, the high clutch accumulator plays the role of locking the low and reverse brake smoothly when selecting R position.

Operation
^ The high clutch accumulator piston is pushed upward by spring force.

Forward drive ranges
^ While in the forward drive range, accumulator control pressure (21) is applied to the bottom part of the accumulator control piston and pushes the piston upward. When shifting up to third gear, line pressure (44) is applied to the high clutch and the high clutch accumulator. When line pressure (44) is applied to the upper part of the accumulator piston, the piston begins to move downward. While the piston is moving, line pressure (44) is pressurized gradually and the shock from the high clutch locking will decrease.





R position
^ While in the R position, the accumulator switch valve switches the line pressure passage, and low and reverse brake operation pressure instead of high clutch operation pressure is applied to the high clutch accumulator. As a result, when locking the low and reverse brakes, the operation pressure (line pressure) gradually pressurizes and decreases the select shock.