Active chassis for a two-track vehicle
AssigneeAudi AG
InventorsAndreas Unger, Wolfgang Schmid, Uli Schaaf
Life of this patent
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Abstract
An active chassis for a two-track vehicle provided with a wheel suspension. A wheel carrier carrying a vehicle wheel is connected via connecting rod to the vehicle structure. The camber behavior of the vehicle wheel is defined by a mechanical camber curve of the vehicle wheels that is predetermined by the rigid kinematics of the connected rods, which defines a mechanical adjustment of the camber angle of the vehicle wheel depending on a spring path of the vehicle structure, and which is controllable with an actuator controller which can be controlled by a chassis control device.
Claims6
An active chassis for a two-track motor vehicle provided with a wheel suspension, comprising:
- a wheel carrier carrying a vehicle wheel connected via connecting rods to a vehicle structure, wherein a camber behavior of the vehicle wheel is determined by a mechanical camber curve predetermined by the rigid kinematics of the connecting rods defining a mechanical adjustment of a camber curve of the vehicle wheel as a function of a spring path of the vehicle structure, and with a camber actuator, controlled by a chassis control device for carrying out an active camber angle adjustment, so that with a change of the vehicle loading state of the vehicle structure, a deflection or a rebound is carried out with the spring path, and with a corresponding adjustment of the mechanical camber angle, wherein in order to control the camber actuator, an evaluating unit is assigned to the chassis control device, which controls the camber actuator when the loading state is changed, and in order to counteract at least partially the mechanical camber angle adjustment with an active camber angle adjustment, or in order to support the mechanical camber angle adjustment, wherein the evaluating unit determines an actuator camber curve on the basis of a current loading state of the vehicle, and wherein the evaluating unit influences the actuator camber curve by controlling the camber actuator of the mechanical camber curve, creating a total camber curve,
- wherein in order to determine an actual loading state, a loading sensor system is in communication with the evaluating unit, by which a change in weight of a load and a change in a longitudinal position of a center of gravity of the load are determined, and are detected as an input parameter obtained by the evaluating unit and on the basis of which the evaluating unit determines the actuator camber curve, and
- wherein the evaluating unit is in communication with a spring path sensor system to detect a spring path resulting from the change in the vehicle loading state.
Dependencies are inferred from the claim text.