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, the TCM monitors the driving conditions such as the vehicle speed and the throttle position and select the optimum gear ratio and determines the gear change steps to the gear ratio.

The information is output to the primary pressure solenoid valve to control the line pressure input/output to the primary pulley, to determine the primary pulley (movable pulley) position and to control the gear position.

• Drive (D) Position

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

• Low (L) Position

  By limiting the shifting range only to the lowest of the gear ratio, a large driving force and engine brake are obtained.

• Hill Climbing and Descending 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.

• Control in Acceleration

  According to the vehicle speed and a change of accelerator pedal angle, driver's request for acceleration and driving scene are judged. This function assists improvement in acceleration feeling by making the engine speed proportionate to the vehicle speed.