Abstract: A suspension arrangement for a vehicle, in particular a utility vehicle having a base and a structure, is disclosed. This arrangement includes at least one first spring and at least one second spring, the at least one first spring and the at least one second spring having spring attachments which are connected to attachment apparatuses of the structure on one side and of the base on the other. The at least one second spring is fastened to the base by way of at least one adjustment device. An adjustable air spring suspension arrangement and methods for controlling the suspension arrangements are disclosed.

Abstract: A torsional vibration damper or torsional vibration absorber has a rotating system with: a primary mass, which is arranged on a rotatable shaft, for example on a crankshaft of an engine, in particular of an internal combustion engine, and preferably can be fastened for conjoint rotation; a secondary mass, which is movable relative to the primary mass; and an assembly for vibration damping and/or vibration absorption of the relative movement between the primary mass and the secondary mass. The assembly for vibration damping and/or vibration absorption of the relative movement between the primary mass and the secondary mass has at least one accumulator inside the rotating system of the torsional vibration damper or torsional vibration absorber.

Abstract: A torsional vibration damper has a hub part, also referred to as primary mass, which can be fastened on a drive shaft of an engine, and an inertia ring, also referred to as secondary mass, which surrounds the hub part in the radially outer region. A damping device is provided between the hub part and the inertia ring. The torsional vibration damper includes an additional torsion spring, wherein the additional torsion spring is axially aligned.

Abstract: A crankshaft arrangement for a combustion engine includes a crankshaft and a torsional vibration damper having a primary mass and an inertia ring. The primary mass is fixedly connected to the crankshaft, and the inertia ring and the primary mass are coupled via a viscous fluid. The torsional vibration damper is attached to an output end of the crankshaft. The primary mass is coupled to a secondary coupling via an elastic coupling device. The torsional vibration damper is coupled to the secondary coupling via a feedback device. The secondary coupling is formed as a dual-mass flywheel with a primary flywheel, a secondary flywheel and the elastic coupling device. A method for damping torsional vibrations of a crankshaft of a crankshaft arrangement is provided.

Abstract: A spring system of a vehicle, in particular a utility vehicle, includes a first spring/damper unit with a first stiffness and a first damping; a second spring/damper unit with a second stiffness and a second damping; and an additional mass as a tuned-mass absorber. The tuned-mass absorber is coupled to at least one negative stiffness. A vehicle having such a spring system and a method for adapting the stiffness of a spring system are provided.

Abstract: A torsional vibration damper has a hub part (primary mass) which can be fastened on a drive shaft of an engine and a flywheel ring (secondary mass) surrounding the hub part in the radially outer region. A gap filled with a fluid and one or more sealing devices are provided between the hub part and the flywheel ring, by which the escape of the fluid is to be prevented. The sealing device or the sealing devices have in each case a first ring connected to the hub part and in each case a second ring connected to the flywheel ring as well as in each case a sealing element made of a plastic material, which is arranged in each case on the one hand in a sealing manner between the first ring and the hub part and on the other hand with the second ring and the flywheel ring. The sealing element is arranged in a clamped manner between the interconnected components, i.e. the first or second ring and the respectively associated hub part or flywheel ring.

Abstract: A torsional vibration damper has a hub part (primary mass) which can be fastened on a drive shaft of an engine and a flywheel ring (secondary mass) which surrounds the hub part in the radially outer region, wherein a gap filled with a fluid and one or more sealing devices are provided between the hub part and the flywheel ring, by which escape of fluid is to be prevented. The sealing devices each have a first ring, which is tightly connected to the hub part, as well as a second ring, which is tightly connected to the flywheel ring, as well as a sealing element made of a plastic material. The respective sealing element is connected in a material-locking manner to fastening sections on a respective outer axial side of the first and second ring. The sealing element has at least one elastically deformable axial projection in the region of each of the fastening sections.

Abstract: A torsional vibration damper or torsional vibration absorber has a rotating system with: a primary mass, which is arranged on a rotatable shaft, for example on a crankshaft of an engine, in particular of an internal combustion engine, and preferably can be fastened for conjoint rotation; a secondary mass, which is movable relative to the primary mass; and an assembly for vibration damping and/or vibration absorption of the relative movement between the primary mass and the secondary mass. The assembly for vibration damping and/or vibration absorption of the relative movement between the primary mass and the secondary mass has at least one accumulator inside the rotating system of the torsional vibration damper or torsional vibration absorber.

Abstract: A viscous torsional vibration damper or absorber includes a hub part which can be fastened to a crankshaft of an engine, in particular of an internal combustion engine, and an inertia ring which is mounted such that it can be rotated relative to the hub part. A shear gap, which is filled with a silicone oil, is formed between the hub part and the inertia ring, in which shear gap one or more sliding bearing components are arranged for supporting the inertia ring in a slidingly guided manner, wherein the sliding bearing component(s) are composed at least in some regions of a polyphthalamide-containing plastic, with a fraction of 50 wt. % of PP A.

Abstract: A viscous torsional-vibration damper has a damper housing with an axis of rotation, an annular working chamber filled with a damping medium, an inertia ring arranged inside the working chamber, and a cover for media-tight closure of the working chamber. The cover is connected to the damper housing peripherally on one side by a sequence of a butt seam and an overlap seam.

Abstract: A crankshaft arrangement for an internal combustion engine includes a crankshaft, a torsional vibration damper having a primary mass and a flywheel, wherein the primary mass is connected fixedly to the crankshaft, and the flywheel and the primary mass are coupled via a viscous fluid. The torsional vibration damper is attached to an output end of the crankshaft. The primary mass is coupled to a secondary coupling via an elastomer coupling ring. The torsional vibration damper is coupled to the secondary coupling via a feedback device. The feedback device has a negative stiffness.

Abstract: A torsional vibration damper (1) having a hub part (2) (primary mass) that is able to be fastened to a driveshaft of a motor, and an inertia ring (3) (secondary mass) that surrounds the hub part (2) in the radially outer region, wherein a fluid-filled gap (4) and sealing devices (5), by means of which the escape of the fluid is intended to be avoided, are provided between the hub part (2) and inertia ring (3), wherein the sealing devices (5) each have a first ring (6), tightly connected to the hub part (2), and each have a second ring (7), tightly connected to the inertia ring (3), and each have a sealing element (12) made of an elastomer, which is connected in each case sealingly to the first ring (6) on one side and in each case to the second ring (7) on the other side, is configured such that the respective sealing element (12) has been vulcanized onto a respective external axial side of the first and second ring (6, 7) by fastening portions.

Abstract: A method determines a service life condition of a torsional vibration damper or absorber having a primary mass and a secondary mass, and a working chamber arranged between the primary mass and the secondary mass that is filled with a viscous damping medium. The vibration damper is arranged on a crankshaft of an engine in order to dampen or eliminate torsional vibrations of this crankshaft. The method includes: operating the engine; determining at least one operating parameter of the engine; simulating a temperature distribution of the viscous damping medium in the working chamber; and determining a lifetime condition of the vibration damper based on the operating parameter of the engine and the result of simulating the temperature distribution of the viscous damping medium.

Abstract: A spring system of a vehicle, in particular a utility vehicle, includes a first spring/damper unit with a first stiffness and a first damping; a second spring/damper unit with a second stiffness and a second damping; and an additional mass as a tuned-mass absorber. The tuned-mass absorber is coupled to at least one negative stiffness. A vehicle having such a spring system and a method for adapting the stiffness of a spring system are provided.

Abstract: A crankshaft arrangement for an internal combustion engine includes a crankshaft, a torsional vibration damper having a primary mass and a flywheel, wherein the primary mass is connected fixedly to the crankshaft, and the flywheel and the primary mass are coupled via a viscous fluid. The torsional vibration damper is attached to an output end of the crankshaft. The primary mass is coupled to a secondary coupling via an elastomer coupling ring. The torsional vibration damper is coupled to the secondary coupling via a feedback device. The feedback device has a negative stiffness.

Abstract: A torsional vibration damper or torsional tuned mass damper having a rotating system having a primary mass, which is arranged, or preferably fixable for conjoint rotation on a rotatable shaft, such as a crankshaft of a motor, for example, in particular an internal combustion engine, and having a secondary mass, which is movable relative to the primary mass. An assembly for vibration dampening and/or tuned vibration dampening of the relative motion between the primary mass and the secondary mass is formed in part outside of the rotating system of the torsional vibration damper or torsional tuned mass damper.

Abstract: A crankshaft assembly which is designed for a reciprocating-piston machine of an internal combustion engine includes a crankshaft, a torsional vibration damper for damping resonance torsional vibrations of the elastic torsion modes of the crankshaft, and an output. The torsional vibration damper has a primary mass inertia and a secondary mass inertia, the primary mass inertia being rigidly connected to a crankshaft and the secondary mass inertia being coupled as a seismic mass with a viscous liquid to the primary mass inertia. The torsional vibration damper is configured to assume the function of a flywheel for reducing rotational non-uniformity in addition to the function of reducing the resonance torsional vibrations of the crankshaft.

Abstract: A viscous torsional-vibration damper has a damper housing with an axis of rotation, an annular working chamber filled with a damping medium, an inertia ring arranged inside the working chamber, and a cover for media-tight closure of the working chamber. The cover is connected to the damper housing peripherally on one side by a sequence of a butt seam and an overlap seam.

Abstract: A viscosity-torsional vibration damper or absorber for a crankshaft of a combustion engine includes an annular damping or absorbing arrangement which can be fastened to the crankshaft. The damping or absorbing arrangement is fastened in an outer diameter region to a holding device which, on the other hand, can be fastened to the crankshaft and can be sprung in the axial direction of the crankshaft, but is inherently rigid radially with respect to the crankshaft.

Abstract: A viscous torsional vibration damper includes: a) an annular damper housing, which bounds a damper chamber; b) an inertia ring arranged in the damper chamber; c) a bearing device, which supports the inertia ring in the damper housing and which has at least one bearing element with an axial bearing region and/or a radial bearing region, d) a shear gap between the inertia ring and the damper housing, which shear gap is filled with a viscous fluid, e) wherein a plurality of the axial bearing segments and/or a plurality of the radial bearing segments is circumferentially distributed on the at least one bearing element.