Transmission control device for continuously variable transmission

A transmission control device for a continuously variable transmission, which continuously varies a rotation speed of an engine mounted in a vehicle having a plurality of travelling modes and outputs the rotation speed, the transmission control device comprising:

• a mode changing unit operated by a driver and changing the travelling mode;
• a first control unit performing a first pseudo stepwise up-shift control that when the travelling mode is a first travelling mode and a first predetermined condition is satisfied, increases a vehicle speed while repeating hold of a transmission ratio and up-shift by a first shifting speed, and reduces a torque of the engine by an amount of an inertia torque generated during the up-shift by the first shifting speed;
• a second control unit performing a second pseudo stepwise up-shift control that when the travelling mode is a second travelling mode and a second predetermined condition is satisfied, increases the vehicle speed while repeating hold of the transmission ratio and up-shift by a second shifting speed that is faster than the first shifting speed, and reduces the torque of the engine by an amount of an inertia torque generated during the up-shift by the second shifting speed;
• and
• a third control unit controlling change of the travelling mode by the mode changing unit and controlling switch between the first pseudo stepwise up-shift control and the second pseudo stepwise up-shift control according to control states of the first control unit and the second control unit, and
• the third control unit being configured to, when the travelling mode is changed from the first travelling mode to the second travelling mode by the mode changing unit during a progress of the up-shift in the first pseudo stepwise up-shift control by the first control unit, maintain the first pseudo stepwise up-shift control by the first control unit until the up-shift is completed.