Loading patent…
AssigneePunch Flybrid Limited
InventorsAndrew Deakin, Ernesto Zedan
Estimating the term…
A transmission for an energy storage and recovery system comprises a variable slip transmission and a clutch arranged to transmit drive while slipping. The level of torque transmitted through the slipping clutch is dependent on the clutch force but is independent of the clutch slip speed. Preferably the clutch is provided by a plurality of clutches connected in parallel in a range extender. When drive is transferred between clutches in parallel, the clutch forces of both clutches are controlled to maintain the total torque transmitted by the clutches. This reduces torque fluctuations at the energy source/sink during clutch transfer. Where there are two slipping clutches in series, one clutch is controlled to provide the required torque and the other clutch is controlled in response to a clutch slip speed. This helps to control the speed of rotation of the mass between the clutches.
A transmission for transmitting torque between an energy storage device and an energy source and/or sink, the transmission comprising a plurality of clutches in series, each of said clutches being operable to transmit torque while slipping substantially continuously;
A method of controlling a transmission comprising a plurality of clutches in series between an energy storage device and an energy source and/or sink, comprising operating a transmission control system to control a first of the plurality of clutches to deliver a predetermined level or range of torque while the first of the plurality of clutches slips substantially continuously, and control a second of the plurality of clutches in response to variations in a speed of slip of one of said plurality of clutches while the first and second clutches are both slipping.
Dependencies are inferred from the claim text.