Control apparatus for use with a vehicle drive mechanism

Control device for use with a drive mechanism (10, 70) of a vehicle, wherein the drive mechanism (10, 70) includes a portion (11) for stepless speed change which includes a differential mechanism (16) coupled to the output of an internal combustion engine (8) comprises first electric motor (M1) and a transmission element (18) are distributed, and a second electric motor (M2) which is in a power transmission path from the transmission element (18) is provided to a plurality of drive wheels (38) and operable as an electric, continuously variable transmission unit, and a portion (20, 72) for automatic speed changing, which forms a portion of the power transmitting path and functions as an automatic transmission unit, and wherein the drive mechanism (10, 70) includes a coupling device (C0, B0), selectively switchable to (a) their dissolved state, in which the coupling device (C0, B0), the rotation relative to each other a plurality of rotary elements of the differential mechanism (16) permitted and thereby brings the portion (11) for stepless speed change in its state to the continuously variable speed change, in which the portion (11) is operable for continuously variable speed change as the electric continuously variable transmission unit, and (b) its engaged state, in which the a coupling device (C0, B0) defines the rotary elements of the differential mechanism (16) to each other or one of the rotary elements of the differential mechanism (16) completely defines and thereby transferred to the portion (11) for stepless speed change in its state for the stepwise speed change, in which the said portion (11) for stepless speed changer Derun g is not operable as the electric continuously variable transmission unit, characterized, in that the control device includes a control device with a control means for stabilizing the vehicle behavior (80) and a judging means for the need to stabilize the vehicle behavior (82) for the stabilization of the vehicle behavior if the vehicle behavior is unstable, and the control device, a vehicle stabilization associated with ...