This engagement method of a new speed ratio nSUBf/SUB includes: a) an action step (127) of an electric machine to make the angular speed ?SUB1/SUB of an initial input transmission shaft converge to the angular speed ?SUB2/SUB of a second shaft multiplied by the stepping-down of the gearbox dnSUBf/SUB of the new ratio nSUBf/SUB, and b) an action step (131) of a mechanical synchroniser in order to make the angular speed ?SUB1/SUB converge to the angular speed ?SUB2/SUB multiplied by the stepping-down of the gearbox dnSUBf/SUB of the new ratio nSUBf/SUB. Steps a) and b) are at least partially executed simultaneously. After step b) has been completed, the method involves an operation (134) involving regulation of the torque quantity transmitted by the mechanical synchroniser of the second shaft to the initial shaft or vice versa, via a maximum energy threshold that can be dissipated by the mechanical synchroniser.
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机译：新的速比n f 的这种接合方法包括：a）电机的动作步骤（127），用于使初始输入变速器的角速度ω 1 轴收敛到第二轴的角速度ω 2 乘以变速箱dn f 的减速比，新比例为n f b）机械同步器的动作步骤（131），以使角速度α 1 收敛于角速度α 2 乘以降压齿轮箱dn f 的比率为新比率n f 。步骤a）和b）至少部分地同时执行。在步骤b）完成之后，该方法包括操作（134），该操作涉及通过第二轴的机械同步器传递至最大能量阈值的，由第二轴的机械同步器传递至初始轴的扭矩量的调节，反之亦然。机械同步器。
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