A roll control system (10) comprising a front torsion bar (16); a front first hydraulic actuator (12); a front second hydraulic actuator (14); a rear torsion bar (16); a rear first hydraulic actuator (12'); a rear second hydraulic actuator (14'); and control means (62, 64) connected to the hydraulic actuators and controlling the operation thereof on detection of a predetermined vehicle condition; wherein each hydraulic actuator comprises a first fluid chamber (40, 40', 42, 42') and a second fluid chamber (50, 50', 52, 52'); wherein the control means comprises a source of fluid pressure (66), a fluid reservoir (68), a pressure control valve (70) fluidly connected between the pressure source and the reservoir, and at least three pressure relief valves (72-76) each having two positions to fluidly connect the fluid chambers of the hydraulic actuators either to the pressure source or to the fluid reservoir; wherein the pressure relief valves are positioned on detection of the predetermined vehicle condition to apply a fluid pressure to the first fluid chamber (40) of the first front hydraulic actuator (12) and to the second fluid chamber (52) of the second front hydraulic actuator (14), and/or to apply a fluid pressure to the second fluid chamber (42) of the first front hydraulic actuator (12) and to the first fluid chamber (50) of the second front hydraulic actuator (14), and/or to apply a fluid pressure to the first fluid chamber (40') of the first rear hydraulic actuator (12') and to the second fluid chamber (52') of the second rear hydraulic actuator (14'), and/or to apply a fluid pressure to the second fluid chamber (42') of the first rear hydraulic actuator (12') and to the first fluid chamber (50') of the second rear hydraulic actuator (14').


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    Title :

    Vehicle roll control system


    Additional title:

    Fahrzeugrollensteuersystem
    Système de régulation de roulis de véhicule


    Contributors:

    Publication date :

    2019-08-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60G VEHICLE SUSPENSION ARRANGEMENTS , Radaufhängungen und Federungen für Fahrzeuge



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