摘要:
A hydropneumatic system (51) for suspensions of vehicle wheel assemblies is provided, for each suspension, with a respective hydropneumatic cylinder (1) having a first and a second body (10,11), which can move axially relative to each other and define respective chambers (14,15), axially separated from each other via a piston element (30); the latter is coupled in a fluid-tight manner to the second body (11) and floats between two stroke end positions in response to the pressures in the two chambers (14,15); the two chambers (14,15) of each hydropneumatic cylinder (1) communicate respectively with a hydraulic supply line (52) and with a pneumatic supply line (57); the system (51) further has a pressurization device which sets the pressure in the pneumatic supply line (57) to a value at least equal to the pressure in the hydraulic supply line (52).
摘要:
An air suspension system for a multi-axle vehicle having air bags (4,5; 6,7; 8,9; 10,11; 44 to 49) supporting either side of the axles (2,3; 41 to 43), including separate air lines (18 to 25; 50 to 55) respectively connecting each air bag to a level control valve (16,17; 56,57) via manifolds (26,27; M) and air lines (28,29; 54,55) to independently control air supply to the bags on either side, the separate air lines being of the same size and length to ensure that substantially the same volume of air is supplied to each bag to improve the responsiveness and stability of the system.
摘要:
Die Erfindung betrifft ein Fahrwerk für ein Fahrzeug mit zwei hintereinander angeordneten Radsätzen und einem federnd auf den Radsätzen abgestützten Fahrwerksrahmen (2). Jedem der Radsätze ist auf jeder Radseite jeweils ein hydraulischer Stabilisator (8a, 8b, 8c, 8d) zugeordnet, derart, dass bei einem Einfedern dieses Radsatzes auf der jeweiligen Radseite Hydraulikflüssigkeit aus einer ersten Hydraulikkammer (9a, 9c, 9e, 9g) des Stabilisators verdrängt wird und beim Ausfedern Hydraulikflüssigkeit aus einer zweiten Hydraulikkammer (9b, 9d, 9f, 9h) des Stabilisators verdrängt wird. Die ersten Hydraulikkammern (9a, 9e) der beiden Stabilisatoren (8a, 8c), welche einer gemeinsamen ersten Radseite zugeordnet sind, und die zweiten Hydraulikkammern (9d, 9h) der beiden Stabilisatoren (8b, 8d), welche der anderen Radseite zugeordnet sind, sind über erste hydraulische Verbindungsleitungen zu einem ersten Hydraulikkreis (10a) miteinander verbunden. Ebenso sind die zweiten Hydraulikkammern (9b, 9d) der beiden Stabilisatoren (8a, 8c), welche der gemeinsamen ersten Radseite zugeordnet sind und die ersten Hydraulikkammern (9c, 9g) der beiden Stabilisatoren (8b, 8d), welche der anderen Radseite zugeordnet sind, über zweite hydraulische Verbindungsleitungen zu einem zweiten Hydraulikkreis (10b) miteinander verbunden. Durch diese erfindungsgemässe hydraulische Verschaltung der Hydraulikkammern wird auf einfache und kostengünstige Weise erreicht, dass eine seitliche Wankbewegung des Fahrwerks durch die Stabilisatoren behindert wird, während alle anderen Bewegungen zugelassen werden.
摘要:
An air suspension system for a multi-axle vehicle having air bags (4,5; 6,7; 8,9; 10,11; 44 to 49) supporting either side of the axles (2,3; 41 to 43), including separate air lines (18 to 25; 50 to 55) respectively connecting each air bag to a level control valve (16,17; 56,57) via manifolds (26,27; M) and air lines (28,29; 54,55) to independently control air supply to the bags on either side, the separate air lines being of the same size and length to ensure that substantially the same volume of air is supplied to each bag to improve the responsiveness and stability of the system.
摘要:
A vehicle suspension control for a vehicle having each wheel (11) supported from the chassis of the vehicle trough a fluid operated extension element (13, 19), the control comprising a controller (27), a plurality of sensors (21, 23, 25, 27, 30, 32), a fluid flow controller (29), a first sensor (2 1) adapted to sense the relative position between the wheel (11) and the chassis and provide a first output to the controller, a second sensor (23) adapted to sense the pressure of the fluid in each extension element (13, 19) and provide a second output to the controller (27) adapted to receive the output from each of the sensors (21, 23) at each wheel, process the outputs and provide a wheel output to the fluid flow controller (29) for each wheel, the force applied by the extension elements (13, 19) between the chassis and wheels will maintain the attitude of the chassis substantially constant relative to a plane.
摘要:
A roll control system (1) for a vehicle suspension system and a method for controlling said control system, the vehicle having at least one pair of laterally spaced front wheel assemblies (2) and at least one pair of laterally spaced rear wheel assemblies (3), each wheel assembly (2, 3) including a wheel (4) and a wheel mounting (5) permitting wheel movement in a generally vertical direction relative to the vehicle body, and vehicle support means (17a, 17b) for providing at least substantially a major portion of the support for the vehicle; the roll control system (1) including: wheel cylinders (8) respectively locatable between each whell mounting (5) and the vehicle body, each wheel cylinder (8) including an inner volume separated into first (51) and second (52) chambers by a piston (53) supported within, and first and second fluid circuits (7) respectively providing fluid connection between the wheel cylinders (8) by fluid conduits (9, 10, 11), each said fluid circuit providing fluid communication between the said first chambers (51) on one side of the vehicle and the said second chambers (52) on the opposite side of the vehicle to thereby provide roll support decoupled from a wrap mode of the vehicle suspension system by providing a roll stiffness about a level roll attitude whilst simultaneously providing substantially zero warp stiffness; and the method including bypassing fluid flow from at least a substantial portion of the conduits (9, 10, 11) during predetermined wheel inputs to the control system to thereby minimise line damping and/or fluid inertia effects on the damping of the control system (1).