Patent ID: 7410436

Claim:
A drive unit comprising a driving source and a transmission-system connected to the driving source, the transmission-system comprising: an inertia mainly constituted by a flywheel; an epicyclic gearing comprising: a first rotational member connected via a first branch to a first node, said first node connected via a second branch to the inertia; a second rotational member connected via a second first branch to a second node, said second node connected via a second second branch to the driving source; and a third rotational member connected via a third first branch to a third node, said third node connected via a third second branch to a load; a transmission-unit with two in/outputs comprising a first in/output connected via a third branch, not comprising part of any of the first branch, second branch, second first branch, second second branch, third first branch, or third second branch, to one of the first, second or third node and a second in/output connected via a second third branch, not comprising part of any of the first branch, second branch, second first branch, second second branch, third first branch, or third second branch, to another of the first, second or third node; and at least one clutch positioned in the third branch or the second third branch, wherein the second rotational member is operatively inseparable from the driving source, wherein the transmission unit comprises one of: an interruptible transmission unit wherein the two in/outputs are coupled to each other via a number of gears configured to be interrupted, and a continuously variable transmission unit.