A powertrain incorporates two electrical units, two planetary gearsets in a radially-stacked package to provide a shortened length of the transmission. The output members of the electrical units are interconnected by a gear mechanism, which is drivingly connected with a conventional differential mechanism,...http://www.google.ca/patents/US7166050?utm_source=gb-gplus-sharePatent US7166050 - Powertrain with an electrically-variable transmission
