Active suspension system for a vehicle
First Claim
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1. Active suspension system for vehicles, comprising:
- supporting assemblies which are arranged between a vehicle body and vehicle wheels, an actively lift-adjustable control unit and a passive spring arranged in series thereto with which each of the supporting assemblies is provided, an automatic control of the control units, a path generator for generating a signal correlated with a lift position of the supporting assembly which is assigned to each of the supporting assemblies, and a sensor arrangement for generating signals which are correlated at least with vertical body accelerations being assigned to the vehicle body, wherein control signals used for controlling the control units have a signal fraction generated by the signals generated by the sensor arrangement, and wherein the signal fraction causes, for higher-frequency fractions of the vertical vehicle body accelerations above a limit frequency, adjustment of the control unit which reduces the respective body acceleration, and, for low-frequency fractions of the body accelerations, adjustment of the control units which, with respect to its extent, is at least one of reduced, imperceptible and opposed.
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Abstract
An active suspension system for vehicles, particularly motor vehicles, has active supporting assemblies which are arranged between the vehicle body and the vehicle wheels. Each of the assemblies includes a passive spring as well as a lift-adjustable control unit arranged in series thereto. The supporting assemblies are controlled as a function of body accelerations of the vehicle, and low-frequency and higher-frequency fractions of body accelerations, which are taken into account differently. As a result, the vehicle follows the road profile comparatively directly while the comfort is good.
84 Citations
9 Claims
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1. Active suspension system for vehicles, comprising:
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supporting assemblies which are arranged between a vehicle body and vehicle wheels, an actively lift-adjustable control unit and a passive spring arranged in series thereto with which each of the supporting assemblies is provided, an automatic control of the control units, a path generator for generating a signal correlated with a lift position of the supporting assembly which is assigned to each of the supporting assemblies, and a sensor arrangement for generating signals which are correlated at least with vertical body accelerations being assigned to the vehicle body, wherein control signals used for controlling the control units have a signal fraction generated by the signals generated by the sensor arrangement, and wherein the signal fraction causes, for higher-frequency fractions of the vertical vehicle body accelerations above a limit frequency, adjustment of the control unit which reduces the respective body acceleration, and, for low-frequency fractions of the body accelerations, adjustment of the control units which, with respect to its extent, is at least one of reduced, imperceptible and opposed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification