Patent ID: 8251848
Filing Date: 2012-08-28
Classification: B60K,B60W,F16H,Y02T,Y10T

Abstract:
1. A transmission for a vehicle comprising: first and second driving shafts to which power is selectively transmitted from a motive power source; a driven shaft to which power is transmitted from the first and second driving shafts; a plurality of drive transmission mechanisms disposed between the first and second driving shafts and the driven shaft; and a switching mechanism that enables the selective transmission of power between the first driving shaft and the driven shaft or between the second driving shaft and the driven shaft via the drive transmission mechanisms, wherein the first and second driving shafts are disposed concentrically and fitted to each other so as to be rotatable relative to each other, and the first and second driving shafts and the driven shaft are disposed on axes that are parallel to each other, a first drive unit able to output a portion of the power transmitted from the motive power source to the first driving shaft and output another portion of the power after changing the another portion of the power in energy form and also able to change a proportion between the power output to the first driving shaft and the power output after being changed in energy form is disposed on the same axis as the axis of the first driving shaft and the second driving shaft, and a second drive unit able to output a portion of the power transmitted from the motive power source to the second driving shaft and output another portion of the power after changing the another portion of the power in energy form and also able to change a proportion between the power output to the second driving shaft and the power output after being changed in energy form is disposed on the same axis as the axis of the driven shaft, the first drive unit and the second drive unit are interconnected so as to be able to send and receive powers changed in energy form to and from each other, each of the first drive unit and the second drive unit includes a planetary mechanism that performs a differential operation by three elements that are an input element to which power is transmitted from the motive power source, an output element that outputs power to one of the driving shafts, and a reaction element, and the first driving shaft is linked to the first drive unit and the second driving shaft is linked to the second drive unit.