AUTOMATIC SHIFT CONTROL OUTLINE [DJVA-EL]
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Automatic Shift Control
• The CVT shift control sets the target input shaft rotation speed in the TCM based on information such as the throttle opening angle, vehicle speed, and brake signal so that the optimum gear ratio and shift speed are obtained. Also, to optimize the gear ratio, it also outputs signals to shift control solenoids No.1 and No.2 so that the rotation speed obtained from the target input shaft rotation speed and the actual rotation speed from the primary pulley speed sensor match.
Ascent Mode
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• When the vehicle is driven on an up slope, the TCM determines that the vehicle is on an up slope based on the signal from the PCM and the output rotation speed, and automatically switches the driving mode to ascent mode. As a result, traction reduction is prevented.
Descent Mode
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• When the vehicle is driven on a down slope, the TCM determines that the vehicle is on a down slope based on the signal from the PCM and the output rotation speed, and automatically switches the driving mode to descent mode. As a result, optimum engine braking occurs.
D-range Shifting
• Controls the gear ratio to obtain both fuel economy and driving performance based on information such as the throttle opening angle and vehicle speed.
M-range Shifting
• Shift the selector lever to the M range and switch to manual mode.
• While in manual mode, perform shifting according to the shift map in the graph.
• If the engine reaches a high engine speed, the following controls are performed to protect the engine:
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1. To alert the driver that the engine speed has reached a high engine speed, the opening and closing of the throttle valve are repeated at regular intervals.
2. The engine speed stabilizes at a lower speed than the excessive speed zone.
3. If the engine speed reaches a high engine speed even if the above procedures are performed, a forced shift-up is performed to lower the engine speed.
