Active suspension system
First Claim
1. An active suspension system for a motor vehicle comprisinga computer,actual-value pick-ups assigned to wheels of the vehicle, each of the pick-ups operatively arranged to generate a signal representative of the distance between the vehicle body and the respective wheel and feed the signal to the computer,spring and support assemblies assigned to the wheels and operatively arranged to provide supporting forces and/or resistances counteracting the lifting movements of the wheels controlled by the computer, wherein the computer is operatively arranged to determine from the signals of the actual-value pick-ups an actual value of the averaged ground clearance, an actual value of the averaged roll angle and an actual value of the averaged pitch angle of the vehicle body and to actuate the spring and support assemblies as a function of the deviations of the actual values from set values, such that the total correction of the supporting forces and/or resistances effected by the computer has a value which corresponds essentially to the sum of those values which the computer would effect for the correction of the averages ground clearance alone and for the correction of the pitch angle alone and for the correction of the roll angle alone, and the computer is operatively arranged to actuate the supporting forces and/or resistances such that forces of the spring and support assemblies affecting rolling movements of the vehicle body can be applied by the spring and support assemblies of the front and rear wheels at predeterminable proportions to achieve a steerage tendency of the vehicle including understeering, oversteering and a neutral behavior.
1 Assignment
0 Petitions
Accused Products
Abstract
Deflection detection pick-ups are arranged at the wheels or wheel suspensions of the vehicle, from the signals of which pick-ups a computer determines an averaged pitch angle. These averaged actual values are compared with predetermined or predeterminable set values. the correction of the supporting forces of the support assemblies effected thereupon by the computer is dependent on the extent to which the vehicle body has to execute pure lifting movements, pure rolling movements and/or pure pitching movements to approximate the actual values to the set values and in which proportions the forces necessary for the damping of rolling or pitching movements are to be applied by the support assemblies of the front or rear wheels. In this case, the forces serving for the compensation of rolling movements can be distributed over the front and rear wheels in such a way that a desired control tendency of the vehicle, in particular a tendency toward under-controlling, is obtained.
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Citations
19 Claims
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1. An active suspension system for a motor vehicle comprising
a computer, actual-value pick-ups assigned to wheels of the vehicle, each of the pick-ups operatively arranged to generate a signal representative of the distance between the vehicle body and the respective wheel and feed the signal to the computer, spring and support assemblies assigned to the wheels and operatively arranged to provide supporting forces and/or resistances counteracting the lifting movements of the wheels controlled by the computer, wherein the computer is operatively arranged to determine from the signals of the actual-value pick-ups an actual value of the averaged ground clearance, an actual value of the averaged roll angle and an actual value of the averaged pitch angle of the vehicle body and to actuate the spring and support assemblies as a function of the deviations of the actual values from set values, such that the total correction of the supporting forces and/or resistances effected by the computer has a value which corresponds essentially to the sum of those values which the computer would effect for the correction of the averages ground clearance alone and for the correction of the pitch angle alone and for the correction of the roll angle alone, and the computer is operatively arranged to actuate the supporting forces and/or resistances such that forces of the spring and support assemblies affecting rolling movements of the vehicle body can be applied by the spring and support assemblies of the front and rear wheels at predeterminable proportions to achieve a steerage tendency of the vehicle including understeering, oversteering and a neutral behavior.
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17. The active suspension system according to claim 20, wherein means is provided for regulating the distribution of the proportions of the forces of the spring and support assemblies affecting rolling movements of the vehicle body over the front and rear wheels or a desired control tendency of the vehicle towards under-controlling.
Specification