# US 10,246,149 B2 · Wheel suspension for a two-track vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,246,149 B2 - Document ID: US10246149B2 - Status: Granted - Kind: B2 - Application number: 15/703,234 - Filed: 2017-09-13 - Published: 2018-03-15 - Granted: 2019-04-02 - Earliest claimed: 2016-09-15 - Assignees: Audi AG - Applicants: Audi AG - Inventors: Sebastian Schindler - Web page: https://patentgrep.com/patent/US10246149B2 ## CPC - B62D 55/1083: {Torsion-bar springs} - B60G 11/44: and also torsion-bar springs - B60G 17/025: {the mechanical spring being a torsion spring (B60G17/0277, B60G21/0553 take precedence)} - B60G 21/055: Stabiliser bars - B62D 55/12: Arrangement, location, or adaptation of driving sprockets - B60G 2202/134: comprising a transversal torsion bar and/or tube - B60G 2202/135: Stabiliser bar and/or tube - B60G 2202/22: Rotary Damper - B60G 2202/32: The spring being in series with the damper and/or actuator - B60G 2202/42: Electric actuator - B60G 2204/122: Mounting of torsion springs - B60G 2204/127: with the mounting of springs or dampers moving so that the direction of the related force vector can be changed, thus contributing to a variation of the loading of the wheel - B60G 2204/419: Gears - B60G 2204/424: Mechanisms for force adjustment, e.g. constant force mechanisms - B60G 2206/427: Stabiliser bars or tubes - B60G 2500/22: Spring constant - B60G 2500/30: Height or ground clearance - B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M) - B60G: VEHICLE SUSPENSION ARRANGEMENTS (air-cushion vehicles B60V; {cycle suspensions B62K25/00}) ## Abstract A wheel suspension for a two-track vehicle having at least one stabilizer formed as a stabilizer torsion spring rod, with the stabilizer extending in the vehicle's transverse direction and having a drive lever on at least one vehicle side, which acts upon a wheel guidance element of the wheel suspension, and having at least one suspension spring, which is tensioned with a spring preload between the vehicle body and a wheel guidance element of the wheel suspension. The suspension spring is at least partially formed as a suspension spring/torsion spring rod. The suspension spring/torsion spring rod is arranged radially within the stabilizer torsion spring rod designed as a hollow rod. ## Claims ### Claim 1 A wheel suspension for a two-track vehicle, comprising: at least one stabilizer formed as a stabilizer torsion spring rod, with the stabilizer extending in the vehicle's transverse direction and having a drive lever on at least one side of the vehicle, which acts upon a wheel guidance element of the wheel suspension, and having at least one suspension spring, which is tensioned with a spring preload between the vehicle body and a wheel guidance element of the wheel suspension, wherein the suspension spring is at least partially formed as a suspension spring/torsion spring rod, wherein the suspension spring/torsion spring rod is arranged radially within the stabilizer torsion spring rod formed as a hollow rod, wherein a first actuator for extending a suspension spring foot point, for regulating a vehicle level of the vehicle body, and a second actuator for adjusting a suspension spring constant is allocated to the suspension spring. ### Claim 2 (depends on 1) The wheel suspension according to claim 1, wherein the first or second actuator is radially arranged, affixed to the body, outside of the stabilizer torsion spring rod, and in that particularly the first actuator is connected to the suspension spring torsion spring rod arranged radially within the stabilizer torsion spring rod by way of a gear speed. ### Claim 3 (depends on 1) The wheel suspension according to claim 1, wherein, in order to connect the suspension spring/torsion spring rod to the first and/or second actuator, a power transfer path is provided, in which an external end of the suspension spring/torsion spring rod, protruding axially over the stabilizer torsion spring rod is connected to an axial bar, which extends essentially axis-parallel and at a radial distance with respect to the stabilizer torsion spring rod, via a coupler protruding outward radially, wherein the first and second actuator engages at the axial bar. ### Claim 4 (depends on 3) The wheel suspension according to claim 3, wherein the gear speed has a gear wheel element arranged, in a torsionally resistant manner, on a drive shaft of the first actuator and an output-side gear wheel element meshing therewith, wherein the gear wheel element is mounted coaxially and rotatably with respect to the stabilizer torsion spring rod on its outer circumference and is connected to the axial bar in a torsionally resistant manner, so that, upon activation of the first actuator, the suspension spring foot point can be shifted in a circumferential direction in order to adjust the height of the vehicle body. ### Claim 5 (depends on 3) The wheel suspension according to claim 3, wherein the axial bar is a spring element, wherein the effective spring length of the suspension spring is extended by the bar length of the axial bar, and the axial bar is connected to the output-side gear wheel element, in a torsionally resistant manner, with the formation of the suspension spring foot point. ### Claim 6 (depends on 5) The wheel suspension according to claim 5, wherein the axial bar is connected to a torque support arranged in a torsionally resistant manner, with formation of the suspension spring foot point, wherein the torque support can be axially shifted by means of the second actuator, wherein the torque support can be axially shifted by the second actuator, so that, upon an axial shift of the torque support, the effective spring bar length of the axial bar can be adjusted in order to adjust the suspension spring constant. ### Claim 7 (depends on 6) The wheel suspension according to claim 6, wherein both the first actuator and the second actuator are installed in the wheel suspension, wherein the output-side gear wheel element functions as the torque support and can be axially shifted by the second actuator. ### Claim 8 (depends on 7) The wheel suspension according to claim 7, wherein the output-side gear wheel element is mounted rotatably on the outer circumference of the stabilizer torsion spring rod by way of an annular gear wheel support, wherein the gear wheel support is in threaded engagement with a drive spindle of the second actuator, so that, upon activation of the second actuator, the annular gear wheel support is axially shifted, along with the output-side gear wheel element mounted rotatably thereupon. ### Claim 9 (depends on 1) The wheel suspension according to claim 1, wherein the suspension spring is a component of a spring-damper unit of the vehicle, and namely together with at least one rotational damper, which can be impacted with compression and rebound movements. ### Claim 10 (depends on 9) The wheel suspension according to claim 9, wherein the rotational damper has a damper housing, which is formed in a rotationally resistant manner, on the vehicle body and a rotor, which is mounted so as to pivot therein around a rotor axis and which can be driven with the compression and rebound movements of the wheel suspension, wherein the damper effect occurs between the rotor and the damper housing, wherein the rotational damper is an electric rotational damper, in which the rotor interacts with a stator firmly attached to the housing. ### Claim 11 (depends on 10) The wheel suspension according to claim 10, wherein the stabilizer torsion spring rod is mounted on at least one body-side stabilizer bearing so as to pivot, wherein the stabilizer bearing is implemented by the rotational damper, wherein the rotor of the rotational damper is implemented as a rotor ring, which is arranged, in a torsionally resistant manner, on the stabilizer torsion spring rod. ### Claim 12 (depends on 11) The wheel suspension according to claim 11, wherein the rotational damper is arranged coaxially with respect to the suspension spring torsion spring rod and in radial alignment thereto. ### Claim 13 (depends on 1) The wheel suspension according to claim 1, wherein the stabilizer torsion spring rod extends in the vehicle's transverse direction without interruption and/or continuously as a single piece, wherein the stabilizer torsion spring rod has a suspension spring/torsion spring rod on each side of the vehicle. ### Claim 14 (depends on 1) The wheel suspension according to claim 1, wherein both the stabilizer torsion spring rod and the suspension spring/torsion spring rod are connected to the output lever in a manner so as to transfer power.