Shift Control

Shift Control





In order to select the gear ratio which can obtain the driving force in accordance with driver's intention and the vehicle condition, monitor the driving conditions, such as the vehicle speed and the throttle position, select the appropriate gear ratio, and determine how to change the gear before reaching it in the TCM. Then send the command to the step motor, and control the flow-in/flow-out of line pressure from the primary pulley to determine the position of the moving-pulley and control the gear ratio.

NOTE: The gear ratio is set for every position separately.

"D" POSITION





Shifting over all the ranges of gear ratios from the lowest to the highest.

"SECOND" POSITION
Use this position for the improved engine braking.

"L" POSITION





By limiting the gear range to the lowest position, the strong driving force and the engine brake can be secured.

DOWNHILL ENGINE BRAKE CONTROL (AUTO ENGINE BRAKE CONTROL)
When downhill is detected with the accelerator pedal released, the engine brake will be strengthened up by downshifting so as not to accelerate the vehicle more than necessary.

KICKDOWN CONTROL
During sudden deceleration, determine if it is a sudden deceleration from the throttle position to secure the highly responsive driving force as necessary. When it is judged as sudden deceleration, speed up the shift pattern faster than normal depression for a certain period of time, and slowly shift gears to get highly responsive shift pattern.