# US 8,783,430 B2 · Tuned vibration absorber for active vehicle suspension > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,783,430 B2 - Document ID: US8783430B2 - Status: Granted - Kind: B2 - Application number: 13/533,004 - Filed: 2012-06-26 - Published: 2013-12-26 - Granted: 2014-07-22 - Earliest claimed: 2012-06-26 - Assignees: Bose Corporation - Applicants: Steven N. Brown - Inventors: Steven N. Brown - Web page: https://patentgrep.com/patent/US8783430B2 ## CPC - F16F 7/104: the inertia member being resiliently mounted {(F16F7/1022 takes precedence)} - B60G 17/015: the regulating means comprising electric or electronic elements ({B60G17/002}, B60G17/005 take precedence) - B60G 17/06: Characteristics of dampers {, e.g. mechanical dampers}(B60G17/015 takes precedence) - B60G 2202/25: Dynamic damper - B60G 2204/30: In-wheel mountings - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION - B60G: VEHICLE SUSPENSION ARRANGEMENTS (air-cushion vehicles B60V; {cycle suspensions B62K25/00}) ## Abstract An apparatus for use in an active suspension system includes a mass damper for damping a first vertical resonance of a wheel having vertical and horizontal diameters. The wheel defines a wheel plane that passes through a center of the wheel and the wheel's vertical and horizontal diameters. The wheel also defines a transverse wheel plane that is perpendicular to the wheel plane and that intersects the wheel-plane along the vertical diameter. The mass damper includes a damping mass coupled to the wheel. The damping mass is constrained from motion relative to the wheel in all but a vertical direction and has a mass distribution that is asymmetric relative to the transverse wheel plane. ## Claims ### Claim 1 An apparatus for use in an active suspension system, said apparatus comprising a mass damper for damping a first vertical resonance of a wheel having a vertical diameter and a horizontal diameter, said wheel defining a wheel plane that passes through a center of said wheel and the vertical and horizontal diameters of the wheel, and a transverse wheel plane that is perpendicular to said wheel plane and that intersects said wheel-plane along said vertical diameter, said mass damper including a damping mass coupled to said wheel, said damping mass being constrained from motion relative to said wheel in all but a vertical direction, said damping mass having a mass distribution that is asymmetric relative to said transverse wheel plane, wherein said mass distribution on a first side of said transverse wheel plane where a brake caliper is located is displaced further away from the wheel plane than the mass distribution on a second side of the transverse wheel plane is displaced away from the wheel plane. ### Claim 2 (depends on 1) The apparatus of claim 1, further comprising a spring-damper-bearing system coupled to said damping mass for guiding vertical motion of said damping mass relative to said wheel. ### Claim 3 (depends on 2) The apparatus of claim 2, wherein said spring-damper-bearing system comprises a first spring-damper-bearing assembly disposed on a first side of said transverse wheel plane and a second spring-damper-bearing-assembly disposed on a second side of said transverse wheel plane. ### Claim 4 (depends on 3) The apparatus of claim 3, wherein said first spring-damper-bearing-assembly is closer to said wheel plane than said second spring-damper-bearing-assembly. ### Claim 5 (depends on 4) The apparatus of claim 4, wherein said spring-damper-bearing-assemblies are disposed such that said second spring-damper-bearing-assembly is mounted closer to a brake caliper than said first spring-damper-bearing-assembly. ### Claim 6 (depends on 1) The apparatus of claim 1, wherein a mass axis of said damping mass is oriented in a direction toward said wheel plane. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein said damping mass defines a mass axis, and wherein said mass axis makes a non-zero angle relative to said wheel plane. ### Claim 8 An apparatus for use in an active suspension system, said apparatus comprising a mass damper for damping a first vertical resonance of a wheel having a vertical diameter and a horizontal diameter, said wheel defining a wheel plane that passes through a center of said wheel and the vertical and horizontal diameters of the wheel, and a transverse wheel plane that is perpendicular to said wheel plane and that intersects said wheel-plane along said vertical diameter, said mass damper including a damping mass coupled to said wheel, said damping mass being constrained from motion relative to said wheel in all but a vertical direction, said damping mass having a mass distribution that is asymmetric relative to said transverse wheel plane, and a spring-damper-bearing system coupled to said damping mass for guiding vertical motion of said damping mass relative to said wheel, wherein said spring-damper-bearing system comprises a first spring-damper-bearing assembly disposed on a first side of said transverse wheel plane and a second spring-damper-bearing-assembly disposed on a second side of said transverse wheel plane. ### Claim 9 (depends on 8) The apparatus of claim 8, wherein said damping mass is configured to accommodate a brake caliper. ### Claim 10 (depends on 9) The apparatus of claim 9, wherein said damping mass is configured to accommodate a caliper disposed at a side of said wheel. ### Claim 11 (depends on 8) The apparatus of claim 8, wherein said mass distribution on a first side of said transverse wheel plane where a brake caliper is located is displaced further away from the wheel plane than the mass distribution on a second side of the transverse wheel plane is displaced away from the wheel plane. ### Claim 12 (depends on 8) The apparatus of claim 8, wherein said first spring-damper-bearing-assembly is closer to said wheel plane than said second spring-damper-bearing-assembly. ### Claim 13 (depends on 12) The apparatus of claim 12, wherein said spring-damper-bearing-assemblies are disposed such that said second spring-damper-bearing-assembly is mounted closer to a brake caliper than said first spring-damper-bearing-assembly. ### Claim 14 (depends on 8) The apparatus of claim 8, wherein a mass axis of said damping mass is oriented in a direction toward said wheel plane. ### Claim 15 (depends on 8) The apparatus of claim 8, wherein said damping mass defines a mass axis, and wherein said mass axis makes a non-zero angle relative to said wheel plane.