Patent ID: 8234953

Claim:
A flywheel system for a vehicle comprising a flywheel, a housing, and at least two annular rings, the flywheel system comprising: a flywheel hub and a rim, wherein a periphery of the flywheel hub is surrounded by the rim, and wherein at least one annular ring is provided at a first side of the flywheel within the housing and at least one annular ring is provided at a second side of the flywheel within the housing, wherein each annular ring is fitted to the housing in an interference fit, and wherein the annular rings have a diameter less than that of the periphery of the flywheel hub; and wherein a contact surface of each annular ring is in close proximity to a contact surface of the flywheel hub periphery; such that, on oscillation of the flywheel, the contact surface of each annular ring contacts against the contact surface of the flywheel hub periphery, thus causing friction.