The flywheel energy storage device (3) comprises a rotor (2) with at least two hubs (11, 12) and a drive (33) for the rotor (2), whereby the rotary element (23) is mounted at least via the first hub (11) with the first journal (21) in a first bearing (31) of the flywheel energy storage device (3), and at least via the second hub (12) with the second journal (22) in a second bearing (32) of the flywheel energy storage device (3), and the rotor (2) can be made to rotate by means of the drive (33) via the first and/or second journals (21, 22), whereby the journals (21, 22) in the rotor (2) are connected to each other exclusively via the hubs (11, 12) and via the rotary element (23).

A flywheel system includes a rotor and a fixture. The rotor forms an aperture. The fixture includes a bottom support, a top support, and a shaft connecting the bottom support to the top support. The shaft passes through the aperture. The bottom support and the top support are outside opposite ends of the aperture. The rotor is configured to rotate about the shaft. A method for operating a flywheel system includes converting between rotational energy of a rotor and electrical energy in windings of a generator stator that is implemented in a stationary shaft passing through an aperture of the rotor, while the rotor is rotating about the shaft.

The present invention relates to a transmission input shaft arrangement (100) for a vehicle transmission, the transmission input shaft arrangement comprising an input shaft (102); a clutch arrangement (104) and a bearing arrangement (106) arranged at a position spaced apart from the clutch arrangement (104). The bearing arrangement (106) comprises a bearing inner ring (108) rotationally connected to the clutch arrangement (104).

The present invention relates to a transmission input shaft arrangement (100) for a vehicle transmission, the transmission input shaft arrangement comprising an input shaft (102); a clutch arrangement (104) and a bearing arrangement (106) arranged at a position spaced apart from the clutch arrangement (104). The bearing arrangement (106) comprises a bearing inner ring (108) rotationally connected to the clutch arrangement (104).

A kinetic energy recovery system (KERS) is provided. The KERS (1) comprises a first speed-up gear arrangement (12) having an input (10) connectable to a vehicle powertrain. The KERS further comprises a hydraulic variator made up of first and second bent axis motors (20,22) fluidly connected to one another, wherein at least the first motor (20) is a variable displacement motor, and the first motor (20) is connected to an output of the first speed-up gear arrangement (12). A second speed-up gear arrangement (34) has an input connected to the second motor (22). At least one flywheel (52) is connected to an output of the second speed-up gear arrangement (34), where the at least one flywheel is located in a vacuum within at least one flywheel chamber (58).

A kinetic energy recovery system (KERS) is provided. The KERS (1) comprises a first speed-up gear arrangement (12) having an input (10) connectable to a vehicle powertrain. The KERS further comprises a hydraulic variator made up of first and second bent axis motors (20,22) fluidly connected to one another, wherein at least the first motor (20) is a variable displacement motor, and the first motor (20) is connected to an output of the first speed-up gear arrangement (12). A second speed-up gear arrangement (34) has an input connected to the second motor (22). At least one flywheel (52) is connected to an output of the second speed-up gear arrangement (34), where the at least one flywheel is located in a vacuum within at least one flywheel chamber (58).

The flywheel (3) comprises a flywheel mass (5) and an automatic starting device (9) for driving into rotation the flywheel mass (5), coaxial with the flywheel mass (5), rotatable with respect to the flywheel mass, and adapted to be torsionally coupled to a motion input (7). The automatic starting device (9) comprises a drag torque transmission member for transmitting drag torque from the automatic starting device (9) to the flywheel mass (5), adapted to transmit a torque that increases as the angular speed of the automatic starting device increases.

The invention is a flywheel rotor that includes a number of adjacent laminations, stacked one on top of another, where each of the laminations has the same shape and is rotationally symmetric around a center axis, and where the shape is substantially circular and includes a plurality of protrusions on the circumference, and each of the laminations includes at least one hole for at fastening bolts to pass through. The invention typically includes an endplate at each end of stack of laminations and one of the two endplates attaches to a stubshaft.

A damper device includes a first rotor disposed to be rotatable, a second rotor rotatable relative to the first rotor, and a plurality of elastic members configured to elastically couple the first rotor and the second rotor in a circumferential direction. The first rotor includes a first plate and a second plate. The first and second plates are axially opposed to each other, and fixed to be immovable in both axial and circumferential directions. The first plate includes a plurality of first holding portions and a plurality of bent portions. The plurality of first holding portions hold the plurality of elastic members. The plurality of bent portions are provided on an outer peripheral end of the first plate, and bent toward the second plate. The second plate includes a plurality of second holding portions holding the plurality of elastic members together with the plurality of first holding portions.

A damper device includes a first rotor disposed to be rotatable, a second rotor rotatable relative to the first rotor, and a plurality of elastic members configured to elastically couple the first rotor and the second rotor in a circumferential direction. The first rotor includes a first plate and a second plate. The first and second plates are axially opposed to each other, and fixed to be immovable in both axial and circumferential directions. The first plate includes a plurality of first holding portions and a plurality of bent portions. The plurality of first holding portions hold the plurality of elastic members. The plurality of bent portions are provided on an outer peripheral end of the first plate, and bent toward the second plate. The second plate includes a plurality of second holding portions holding the plurality of elastic members together with the plurality of first holding portions.