Active suspension system
First Claim
1. An active suspension system for motor vehicles, accepting static as well as dynamic loads, comprising a hydraulic suspension system, preferably designed as a multiple piston and cylinder arrangement, having at least three chambers, a program-controlled regulating device which regulates the pressure in at least one first hydraulic chamber of the suspension device which expands upon extension of the suspension as well as a second hydraulic chamber which expands upon compression of the suspension as a function of operating or driving states, characterized in that the first and second hydraulic chambers undergo equal volume changes during suspension travel, and wherein an additional chamber of the suspension system, which expands upon extension of the suspension, is subjected to a constant pressure which is essentially independent of chamber volume and serves to compensate the static load.
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Accused Products
Abstract
A hydraulic support system has a first expandable chamber which is subjected to a constant pressure sufficient for compensating the static load. Two further chambers assigned to equally larger effective surface areas of pistons can be subjected to different pressures by means of a regulating and change-over device to cause active compression and rebound and a return to a middle position.
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Citations
12 Claims
- 1. An active suspension system for motor vehicles, accepting static as well as dynamic loads, comprising a hydraulic suspension system, preferably designed as a multiple piston and cylinder arrangement, having at least three chambers, a program-controlled regulating device which regulates the pressure in at least one first hydraulic chamber of the suspension device which expands upon extension of the suspension as well as a second hydraulic chamber which expands upon compression of the suspension as a function of operating or driving states, characterized in that the first and second hydraulic chambers undergo equal volume changes during suspension travel, and wherein an additional chamber of the suspension system, which expands upon extension of the suspension, is subjected to a constant pressure which is essentially independent of chamber volume and serves to compensate the static load.
Specification