Patent ID: 8594876
Filing Date: 2013-11-26
Classification: B60K,B60L,B60W,F02D,F02N,Y02T

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 rotation speed control unit that sets a starting up target value that is a target value of rotation speed of the first rotating electrical machine and performs a rotation speed control to allow the rotation speed of the first rotating electrical machine to be equal to the starting up target value, when the frictional engagement device enters a released state and an internal combustion engine starting up condition, under which the internal combustion engine is started up from a state in which the internal combustion engine is stopped, is established, 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 a difference in the rotation speed between the two engagement members, which engage with each other, of the frictional engagement device is equal to or greater than a threshold value of a differential rotation, on condition of the performing of rotation speed 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 instruction unit that gives a starting up instruction with respect to the internal combustion engine on condition of being in the direct engagement state; the rotation speed control unit sets the starting up target value in such a manner that a rotation speed at the time of a direct connection, which is a rotation speed of the internal combustion engine at the time of being in the direct engagement state, becomes a starting up rotation speed that is set within a startable rotation speed range that is a rotation speed range in which the internal combustion engine may be started up.