| 摘要 |
An automatic speed change control method for a self-movable vehicle wherein, during running of a self-movable vehicle of a type that a power of an engine is transmitted to driving wheels through a clutch and a finite-stage gear speed changer, a speed-change ratio is calculated from both an actual speed and an acceleration pedal stepping value, the clutch is disengaged after detecting the above speed change ratio having been equal to a next present speed-change ratio, next gears are meshed with a prescribed time delayed, characterized by that, only when the acceleration pedal stepping value is detected to be zero during running of the vehicle on a high-speed stage and at the same time the actual vehicle speed is larger than a prescribed preset vehicle speed at which a gear mode is to be changed to a low-speed stage, the gear mode is forcibly changed to the low-speed stage to enable an engine brake to function more effectively. |
