Active vehicle suspension system
First Claim
Patent Images
1. An active suspension system for a vehicle, comprising:
- a plurality of supporting units, each of said supporting units having an actively lift-adjustable regulating unit and a passive spring arranged in series thereto;
an automatic control for the regulating units;
a path sensor for each supporting unit which generates a signal corresponding to a lifting position of the respective supporting unit; and
an arrangement of acceleration sensors provided on a body of the vehicle which generate signals for body-side longitudinal and lateral accelerations and lifting movements,wherein control signals used for controlling the regulating units comprise a first proportion generated by signals of said acceleration sensors and a second proportion generated by signals of said path and acceleration sensors,the first proportion being determined by pitching, rolling and lifting movements of the vehicle body determined by the acceleration sensors, andthe second proportion being determined by a comparison of definable desired values for a position of the vehicle body relative to the ground with assigned actual values which are mathematically determined from the lifting positions of the supporting units and at least the vehicle body accelerations in the longitudinal and lateral directions.
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Abstract
An active suspension system, particularly for vehicles, having supporting units which each have an actively lift-adjustable regulating unit and a passive spring arranged in series thereto. Preferably, a damper is arranged at least in parallel to the spring. By use of various acceleration sensors, lifting, pitching, rolling, longitudinal and lateral accelerations of the vehicle body can be determined. By use of path sensors, the lifting positions of the supporting units are registered. A signal analysis permits the achievement of a definable suspension characteristic.
135 Citations
15 Claims
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1. An active suspension system for a vehicle, comprising:
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a plurality of supporting units, each of said supporting units having an actively lift-adjustable regulating unit and a passive spring arranged in series thereto; an automatic control for the regulating units; a path sensor for each supporting unit which generates a signal corresponding to a lifting position of the respective supporting unit; and an arrangement of acceleration sensors provided on a body of the vehicle which generate signals for body-side longitudinal and lateral accelerations and lifting movements, wherein control signals used for controlling the regulating units comprise a first proportion generated by signals of said acceleration sensors and a second proportion generated by signals of said path and acceleration sensors, the first proportion being determined by pitching, rolling and lifting movements of the vehicle body determined by the acceleration sensors, and the second proportion being determined by a comparison of definable desired values for a position of the vehicle body relative to the ground with assigned actual values which are mathematically determined from the lifting positions of the supporting units and at least the vehicle body accelerations in the longitudinal and lateral directions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of controlling an active suspension system for a vehicle having a plurality of supporting units, each of said supporting units having an actively lift-adjustable regulating unit and a passive spring arranged in series thereto, said method comprising the acts of:
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generating signals corresponding to lifting positions of the supporting units via respective path sensors assigned to said supporting units; generating signals for body-side longitudinal and lateral accelerations and lifting movements via an arrangement of acceleration sensors provided on a body of the vehicle; controlling the regulating units based on control signals comprising a first proportion generated by signals of said acceleration sensors and a second proportion generated by signals of said path and acceleration sensors, determining the first proportion based on pitching, rolling and lifting movements of the vehicle body determined by the acceleration sensors, and determining the second proportion based on a comparison of definable desired values for a position of the vehicle body relative to the ground with assigned actual values which are mathematically determined from the lifting positions of the supporting units and at least the vehicle body accelerations in the longitudinal and lateral directions. - View Dependent Claims (11, 12, 13, 14)
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15. A computer software product for controlling an active suspension system for a vehicle having a plurality of supporting units, each of said supporting units having an actively lift-adjustable regulating unit and a passive spring arranged in series thereto, said software product comprising a computer readable medium, said computer readable medium having stored thereon code segments which:
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detect lifting positions of the supporting units via respective path sensors assigned to said supporting units; detect body-side longitudinal and lateral accelerations and lifting movements via an arrangement of acceleration sensors provided on a body of the vehicle; control the regulating units based on control signals comprising a first proportion generated by signals of said acceleration sensors and a second proportion generated by signals of said path and acceleration sensors, determine the first proportion based on pitching, rolling and lifting movements of the vehicle body determined by the acceleration sensors, and determine the second proportion based on a comparison of definable desired values for a position of the vehicle body relative to the ground with assigned actual values which are mathematically determined from the lifting positions of the supporting units and at least the vehicle body accelerations in the longitudinal and lateral directions.
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Specification