Patent ID: 9610951
Date: 2017-04-04
CPC Classifications: B60W,B60Y,F16H,Y02T

Claim:
1. A method of operating a drive train comprising a drive motor and an automatic or automated transmission coupled between the drive motor and drive wheels of a motor vehicle, wherein the automatic or automated transmission is operatively configured to, in an automatic mode, automatically change between gears, and to, in a manual mode, change gears to a higher or lower gear in response to a corresponding one of an up-shift request or a down-shift request from at least one driver-actuated manual shift operating element, the method comprising the acts of: determining whether the automatic or automated transmission is in the automatic mode or the manual mode; when in the automatic mode, shifting the automatic or automated transmission into a coasting mode the drive train in which an operative connection between the drive motor and the drive wheels is disengaged when predefined vehicle operating conditions for entry into the coasting mode exist; determining whether the down-shift request is present when the automatic or automated transmission is in automatic mode and in the coasting mode; when in the automatic mode and the coasting mode and the down-shift request is present, shifting from the coasting mode to the manual mode; and determining whether the up-shift request is present when the automatic or automated transmission is in automatic mode and in the coasting mode; when in the automatic mode and the coasting mode and the up-shift request is present, the automatic mode and the coasting mode are maintained.