Patent ID: 8460155

Claim:
A control apparatus for a twin-clutch automatic transmission to be connected to the twin-clutch automatic transmission; wherein the twin-clutch automatic transmission has a plurality of gear positions which are divided into a first gear position group and a second gear position group, and which are operatively and are connectably coupled with an engine output shaft of an internal-combustion engine; the twin-clutch automatic transmission comprises a first input shaft for the gear positions belonging to the first gear position group; a first clutch mechanism for connecting the first input shaft to the engine output shaft; a first rotating speed detector for detecting a rotating speed of the first input shaft; a second input shaft for the gear positions belonging to the second gear position group; a second clutch mechanism for connecting the second input shaft to the engine output shaft; and a second rotating speed detector for detecting a rotating speed of the second input shaft; the control apparatus is communicable with an internal-combustion engine control unit to which rotating speed information on the engine output shaft of the internal-combustion engine is input; the control apparatus controls to engage the first clutch mechanism for a start of a vehicle, based on the rotating speed information received from the internal-combustion engine control unit; when reception of the rotating speed information from the internal-combustion engine control unit is failed, the control apparatus puts the gear positions belonging to the second gear position group into a disengaged state, and then puts the second clutch mechanism into a engaged state, and converts a rotating speed of the second input shaft detected by the second rotating speed detector into to a rotating speed of the engine output shaft; the control apparatus controls to fasten the first clutch mechanism based on the converted rotating speed of the engine output shaft; and wherein when reception of the rotating speed information from the internal-combustion control unit is failed, the control apparatus calculates abnormal state clutch torque to fasten the first clutch mechanism by a combination of abnormal state feed-forward control torque independent of actual torque of the internal-combustion engine and abnormal state feedback control torque calculated based on a deviation between a target rotating speed of the internal-combustion engine and the converted rotating speed of the engine output shaft.