Disclosed embodiments are related to suspension systems including dampers and suspension actuators and related methods of control for mitigating the effects of potholes and other road surface discontinuities.

A suspension system (400) for supporting a chassis (200) of a vehicle (100). The suspension system (400) comprises a suspension unit (442). The suspension unit (442) comprises a wheel arm assembly (444) comprising a first wheel arm (402) having a chassis mount end (410) and a wheel mount end (412). The chassis mount end (410) of the first wheel arm (402) are provided with a chassis mounting member (414), the chassis mount end (410) of the first wheel arm (402) and chassis mounting member (414) being pivotable relative to one another around a chassis mount pivoting axis (230). The chassis mounting member (414) is configured to support the chassis mount end (410) of the first wheel arm (402) so that the first wheel arm (402) and chassis mounting member (414) are operable to pivot 180 degrees relative to one another about the chassis mount pivoting axis (230).

A vibration damper unit having a longitudinal axis includes a damper, a counter bearing that forms a first spring bearing face, a spring that bears against the first spring bearing face, and a base-adjusting device. The base-adjusting device may be offset from the counter bearing along the longitudinal axis and may have a first adjusting partner and a second adjusting partner that is arranged along the longitudinal axis at least partially between the first adjusting partner and the spring and is mounted movably relative to the first adjusting partner in an adjustment direction parallel to the longitudinal axis, has a force-absorbing element for absorbing an adjustment force and forms a second spring bearing face against which the spring bears. In embodiments, the second adjusting partner may comprise a bridging element between the second spring bearing face and the force-absorbing element.

A fluid suspension system for a land vehicle is provided with a fluid biasing member with a first fluid port and a second fluid port. The fluid biasing member is adapted to be connected to a chassis and a first axle of a land vehicle spaced apart from a pivotal connection of the first axle to pivot the first axle relative to the chassis upon movement to a first position and a second position. A proportional valve is in fluid cooperation with the first fluid port of the fluid biasing member to permit fluid to flow to the fluid biasing member to bias the fluid biasing member to the first position, and to permit the fluid to flow from the fluid biasing member to the proportional valve, and to the second fluid port of the fluid biasing member to bias the fluid biasing member to the second position.

A vehicle comprising: a vehicle body; first and second wheel assemblies each having a rotation axis; first and second suspension linkages, each suspension linkage coupling a respective wheel assembly to the vehicle body to permit motion of the rotation axis of that wheel assembly relative to the vehicle body; a cross-vehicle spring having a first attachment point coupled to the first suspension linkage and a second attachment point coupled to the second suspension linkage; an active link coupling the first attachment point to the first suspension linkage, the active link being configured to have: (i) a first mode in which the active link permits motion of the first suspension linkage relative to the first attachment point so that the cross-vehicle spring and the active link together constrain motion of the first and second suspension linkages with a first spring rate during common motion of the first and second suspension linkages; and (ii) a second mode in which the active link fixes the motion of the first suspension linkage relative to the first attachment point so that the cross-vehicle spring and the active link together constrain motion of the first and second suspension linkages with a second spring rate during common motion of the first and second suspension linkages; wherein the first spring rate is different to the second spring rate.