| 摘要 |
<p>A method of operating a vehicle transmission is described. The method includes determining lowest and highest gear ratio set points of the transmission based at least in part on minimum and maximum non-electric engine rotational speed limitations, respectively, and determining if the vehicle is in a coasting mode. When the vehicle is in coasting mode, the lowest set point is modified to slow the non-electric engine below the minimum non-electric engine rotational speed limitation, to reduce engine drag and maximize recuperation energy. When it is determined that the vehicle is no longer in coasting mode, the method includes restoring the first set point and accelerating the non-electric engine to at least the minimum non-electric engine rotational speed.</p> |
