Patent ID: 7494442

Claim:
A shift control device for an automated manual transmission in an automotive vehicle, the transmission having a plurality of power transmission lines equipped with respective start clutches and gears, the shift control device comprising: a plurality of clutch actuation mechanisms that regulate clutch engagement forces to selectively engage and disengage the respective start clutches; and a transmission shift controller that causes the clutch actuation mechanisms to regulate the clutch engagement forces, respectively, so as to execute clutch changeover control for engaging one of the start clutches and disengaging any of the start clutches other than said one of the start clutches upon gear selection for a desired gear range in response to a transmission shift command, wherein each of the clutch actuation mechanisms has primary and secondary clutch engagement force regulation units operable independently; and the transmission shift controller outputs a control signal to the primary and secondary clutch engagement force regulation units of each of the clutch actuation mechanisms under the clutch changeover control so that either the primary or secondary clutch engagement force regulation unit of said each of the clutch actuation mechanisms becomes operated to regulate a corresponding one of the clutch engagement forces in accordance with the control signal.