Patent ID: 7276007

Claim:
A hybrid drive unit, comprising: an input member which receives a driving force from an engine; an output member which outputs the driving force to a wheel; a first electric machine and a second electric machine; a first differential gear unit and a second differential gear unit, each differential gear unit including at least three gear elements; and at least three friction engagement elements, one being a first friction engagement element, one being a second friction engagement element, and one being a third friction engagement element, wherein one of the three gear elements of the first differential gear unit is coupled to the input member, another of the three gear elements of the first differential gear unit is connected to the first electric machine, and another of the gear elements of the first differential gear unit is coupled to the second electric machine; one of the gear elements of the second differential gear unit is connected to the output member; a plurality of output modes, including a direct drive mode of a rotational speed of the output member is same as the second electric machine, are achieved by selectively applying the first friction engagement element, the second friction engagement element, and the third friction engagement element; the third friction engagement element, by application of the third friction engagement element, reduces a rotation speed of the second electric machine; and the second friction engagement element, by application of the second friction engagement element, rotates the output member and the second electric machine at the same rotation speed.