| 摘要 |
An automotive transmission with three forward speeds and three reverse speeds is automatically upshifted or downshifted under the control of a speed sensor coacting with an output shaft of that transmission. The engine is automatically decelerated and accelerated during upshifting and downshifting, respectively, for a smooth transition from one speed ratio to the next. A changeover from forward driving to reverse, or vice versa, with the aid of a manual mode selector is possible only at relatively low shaft speeds. Another manual selector is settable to limit the operation of the system to one or two speed ratios in either the forward or the reverse mode. |
