Patent ID: 8414451
Filing Date: 2013-04-09
Classification: B60K,B60L,B60W,F02D,F02N,Y02T,Y10T

Abstract:
1. A driving device for a vehicle, which is provided with an input member that is connected in a driving manner to an internal combustion engine, an output member that is connected in a driving manner to wheels, a first rotating electrical machine, a second rotating electrical machine, a differential gear unit including at least three rotational elements, and a control device, wherein the input member, the output member, and the first rotating electrical machine are connected in a driving manner to the rotational elements, which are different from each other, of the differential gear unit, not through another rotational element of the differential gear unit; the second rotating electrical machine is connected in a driving manner to one of the rotational elements of the differential gear unit other than the rotational element to which the first rotating electrical machine is connected in a driving manner, not through another rotational element of the differential gear unit; the driving device includes a frictional engagement device that is capable of releasing the connection in a driving manner between any of the input member, the output member, and the first rotating electrical machine, and the rotational elements of the differential gear unit; the control device includes, a differential rotation reducing control unit that performs a differential rotation reducing control to change a rotation speed of the first rotating electrical machine in such a manner that the difference in the rotation speed between two engagement members, which engage with each other, in the frictional engagement device becomes small, when the internal combustion engine is started up from a state in which the frictional engagement device enters a released state, the internal combustion engine is stopped, and the output member rotates, an engagement control unit that performs a non-synchronization engagement control that allows the frictional engagement device to engage, in a non-synchronization state in which the difference in the rotation speed between the two engagement members is equal to or greater than a threshold value of the differential rotation, on condition of the performing of the differential rotation reducing control, and that allows the frictional engagement device to be a direct engagement state that is an engagement state in which the differential rotation is not present between the two engagement members, and a starting up control unit that changes the rotation speed of the first rotating electrical machine with a rotation speed of the first rotating electrical machine, which allows the internal combustion engine to have a rotation speed at which the starting up is possible, made as a target value, on condition of being in the direct engagement state; and the differential rotation reducing control unit changes the rotation speed of the first rotating electrical machine with the upper limit and the lower limit of a starting up torque outputable range, which is a rotation speed range in which the starting up torque necessary for the starting up of the internal combustion engine may be output by the first rotating electrical machine, made as limits.