Patent ID: 7862470

Claim:
A vehicle transmission comprising: a speed change mechanism which is mounted in a vehicle, and which changes the speed of output of an engine and transmits the output to wheels; a clutch mechanism which is disposed in a power transmission path from the speed change mechanism to the wheels, and which engages and disengages power transmission via the power transmission path; and a speed change control device which carries out speed change control of the speed change mechanism in accordance with the speed of the vehicle and the position of a throttle of the engine or an accelerator pedal, wherein the speed change control device comprises: first vehicle speed selection means for comparing a first vehicle speed obtained from a rotation speed of the wheels and a second vehicle speed obtained from a rotation speed of an output member of the speed change mechanism, and selecting the lower of the first and second vehicle speeds as a substitute vehicle speed; and second vehicle speed selection means for comparing a third vehicle speed obtained from an output side rotation speed of the clutch mechanism and the substitute vehicle speed, and selecting the higher of the third vehicle speed and the substitute vehicle speed as a control vehicle speed, the vehicle transmission carrying out speed change control using the control speed as the vehicle speed.