Patent ID: 7673727

Claim:
An automatic shift control device mounted on a vehicle provided with an engine, comprising: a friction clutch; a dog clutch gearbox which has a plurality of first gears each having engaging projections, and a plurality of second gears each having engaging recesses engageable with the engaging projections, the gear box being configured to achieve a gear change when the engaging projections of a first gear are engaged with any engaging recesses of a second gear; an automatic shift device with at least one electric actuator, the automatic shift device being configured to engage and disengage the friction clutch and to perform a gear change in the dog clutch gearbox; and a control unit configured to control the actuator to shift a clutch position of the friction clutch to a clutch position on the disengaged side from a first clutch position, the first clutch position corresponding to a maximum state of partial engagement of the friction clutch which allows the vehicle to remain stopped with the engine idling, and engages the friction clutch after a gear change; wherein the control unit is configured to shift the clutch position of the friction clutch to a second clutch position at which the friction clutch is in a mechanical maximum disengaged state when the vehicle is stopped and when the dog clutch gearbox is in a gear-in state and the engine is being driven, and configured to perform a control to maintain a state in which the clutch position of the friction clutch is at a clutch position between the first clutch position and the second clutch position at the time of a shift change while the vehicle is moving forward.