Patent ID: 7207915
Filing Date: 2007-04-24
Classification: B60K,B60W,F16H,Y02T

Abstract:
1. A hybrid transmission, comprising: a gear train that comprises two sets of differential units, each differential unit having two degrees of freedom and three revolvable elements, with one revolvable element of one of the two sets of the differential units coupled to one revolvable element of the other of the two sets of the differential units, wherein the hybrid transmission enables a selection between a first predetermined gear ratio wherein a remaining revolvable element of the one of the two sets of the differential units is revolved with a remaining one revolvable element of the other of the two sets of the differential units mutually in the same direction, and a second predetermined gear ratio wherein the remaining one revolvable element of the one of the two sets of differential units is revolved with the remaining one revolvable element of the other of the two sets of the differential units mutually in reverse directions; an input side motor/generator; an output side motor/generator; an input portion from a prime mover; and an output portion toward a drive system, the input and output side motor/generators and the input and output portions being coupled to the two sets of the differential units in such a manner that, under the selection of the first predetermined gear ratio, in a revolution speed order, the input side motor/generator, the input portion from the prime mover, the output portion toward the drive system, and the output side motor/generator are coupled to the respective revolvable elements of the two sets of the differential units and the output side motor/generator is coupled to at least one revolvable element which does not take part in a revolution of the output portion in any predetermined gear ratio.