A damper device includes an input element to which a torque from an engine is transmitted, an output element, an elastic body arranged to transmit a torque between the input element and the output element, and a rotary inertia mass damper that includes a planetary gear that includes a sun gear arranged to rotate integrally with one element of the input element and the output element, a carrier that rotatably supports a plurality of pinion gears and is arranged to rotate integrally with the other element of the input element and the output element, and a ring gear that meshes with the plurality of pinion gears and works as a mass body. The other element includes two plate members that are opposed to each other and coupled with each other by means of a plurality of rivets disposed between the pinion gears.

A flywheel apparatus includes a damper, and a mass ring including a first surface facing a first side in an axial direction, a second surface facing a second side and a first circumferential surface facing an inner side in a radial direction. The apparatus includes a drive plate including a first wall portion including a third surface being in contact with the second surface, and a plurality of protruding portions, each of the plurality of protruding portions including an end surface configured to fit to the first circumferential surface. The drive plate is configured such that the mass ring is concentrically attachable to the drive plate by the fitting of the end surfaces and the first circumferential surface to each other.

A flywheel for use in an automobile between an engine and a clutch assembly is provided. The flywheel is a circular member having an engine side and an opposite clutch side. An aperture is formed in the circular member having an axis, and the aperture is used to operatively attach the flywheel to the engine. A plurality of clutch fins and/or grooves are formed on the clutch side adjacent the outer edge of the circular member and spaced radially about the axis of the aperture of the flywheel. The clutch fins have a face that is generally coplanar with the clutch side of the circular member. The fins and grooves work to cool the internal components of the engine. Optionally, a second set of grooves and fins may be formed on the engine side of the flywheel to further aid in cooling the clutch disc and other engine components.

An intermediate member is configured to include first and second intermediate members. Connecting portions that respectively extend outward from the first or the second intermediate plates are coupled with each other at two positions on the same circumference as pinion gears by two rivets (total six rivets at three connecting portions) as viewed in a central axis of the damper device. Such an arrangement enables spaces between the pinion gears to be used effectively, increases spaces for the first spring, the second spring and the inner spring and improves a vibration damping performance of a damper device.

An intermediate member is configured to include first and second intermediate members. Connecting portions that respectively extend outward from the first or the second intermediate plates are coupled with each other at two positions on the same circumference as pinion gears by two rivets (total six rivets at three connecting portions) as viewed in a central axis of the damper device. Such an arrangement enables spaces between the pinion gears to be used effectively, increases spaces for the first spring, the second spring and the inner spring and improves a vibration damping performance a damper device.

Compositions for balancing a rotary system are disclosed having hydrophobic particles distributed in thixotropic balancing substance. Further disclosed are methods for balancing a rotary system and rotary systems using the composition.

A dome connector for a flywheel rim to shaft attachment is provided. The dome connector includes a helically wound composite band that extends from a first port to a second port. The helically wound composite band has a helical angle in relation to a line perpendicular to a center of axis of the dome connector. The helical angle is selected to at least in part achieve a desired stiffness in the dome connector.

A flywheel apparatus includes a damper, and a mass ring including a first surface facing a first side in an axial direction, a second surface facing a second side and a first circumferential surface facing an inner side in a radial direction. The apparatus includes a drive plate including a first wall portion including a third surface being in contact with the second surface, and a plurality of protruding portions, each of the plurality of protruding portions including an end surface configured to fit to the first circumferential surface. The drive plate is configured such that the mass ring is concentrically attachable to the drive plate by the fitting of the end surfaces and the first circumferential surface to each other.

A flywheel assembly is provided which comprises a housing, a flywheel rotatably mounted in the housing and defining an inner and an outer circumferential surface, and an inner body spaced radially and inwardly from the inner circumferential surface of the flywheel. The flywheel rotates in use around and relative to the inner body, the assembly defines an engagement surface spaced radially and outwardly from the outer circumferential surface of the flywheel, and the inner body is flexibly coupled to the housing. If the flywheel mounting fails during rotation at speed leading to displacement of the flywheel, flexure of the coupling as a result of forces exerted on the inner body by the displaced flywheel allows the flywheel to contact the engagement surface.

A glue-on attachable flywheel weight adds rotational mass to a flywheel allowing for a vehicle operator to alter the power characteristics of an engine. Different flywheels require different shapes of attachable weights. The attachable weights can be machined to fit a multitude of different flywheels to add the rotational mass. Applying an adhesive secures the weight onto the flywheel and adds the rotational mass in a user-friendly convenient manner.