Device and method for controlling gear shifting of subtransmission

A device for controlling gear shifting of a subtransmission provided on a vehicle, comprising:

• vehicle speed pulse generating means for generating a vehicle speed pulse in accordance with a vehicle speed;
• first judging means for, without depending on the vehicle speed pulse, judging whether or not a first condition by which the vehicle can be considered to be running is satisfied;
• first timer means for counting a period of time for which the first condition is satisfied, from the time each vehicle speed pulse is generated;
• first condition satisfied period determining means for determining the period counted by the first timer means to be a first condition satisfied period at the moment the first condition becomes unsatisfied from a satisfied state;
• waiting period determining means for determining a waiting period in a predetermined manner by using the first condition satisfied period;
• second timer means for counting a period of time from the time the first condition becomes unsatisfied from the satisfied state;
• and
• vehicle speed requirement accepting means for accepting that a vehicle is standing or running at the very low speed or less, when the period counted by the second timer means reaches the determined waiting period,
• wherein the gear shifting of the subtransmission is controlled by using an actuator and a control unit, and can be carried out only when the vehicle is standing or running at the very low speed or less.