| 摘要 |
PURPOSE:Make it possible to compensate secular change in the coefficient of friction for the clutch and the brake of a speed change mechanism by determining electromagnetic solenoid duty ratio at the time of speed change according to vehicle running states both before the said speed change and at the time of past speed change. CONSTITUTION:Information 1 on a vehicle running state such as vehicle speed, the input-output number of revolutions of a speed change gear, and throttle opening is converted into a signal 3 for the vehicle running state in a detecting circuit 2 for the vehicle running state, and a judging circuit 4 for speed change range determines the speed change rarge on the said signal 3. In addition to that, a speed change range signal 5 determined by the judging circuit 4 for the speed change range is sent with the signal 3 for the vehicle running state into a determining means 7 for speed change solenoid on-off duty ratio, which determines the duty ratio according to the vehicle running states both at the time of past vehicle speed change and at present. Thus, a hydraulic circuit 10 is controlled through an eleotromagnetic solenoid driving part 6 according to a duty ratio signal 8 to control a speed change mechanism 11.
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