摘要:
A bushing assembly (42) adapted for application in vehicle suspension systems (10) includes an outer, generally cylindrical bushing member (50), an inner generally cylindrical bushing member (52) arranged concentrically within the outer member (50). The two bushing members (50, 52) are interconnected by an elastomeric member (54) disposed there between and bonded thereto to permit limited rotational displacement between the external and internal bushing members (50, 52). An angular position sensor (62) is at least partially embedded within the elastomeric member (54) and operated to produce an output signal indicative of the relative angular position of the external and internal bushing members (50, 52). The sensor (62) includes a stator assembly (102) including a permanent magnet (106), a galvanomagnetic sensing element (108) and a flux guide (110, 112) defining at least one pole face (122, 124), and a rotor (104) including a flux guide (126, 128) defining a second pole face (130, 132). An air gap (Ra, Rb) between the two pole faces (122, 124 & 130, 132) varies dimensionally as a function of the relative angular position of the stator assembly (102) and rotor (104).
摘要:
The invention relates to a method and a controller for vehicle motion control. In order to coordinate the activities of several active chassis control systems a motion request (M_req) is first expressed by desired values (F_body_x_req, ..., T_body_phi_req) of body forces and/or torques corresponding to the six degrees of freedom of the vehicle. Next, the requested commands (u_1, ..., u_n) for given actuators (A1, ... An) are calculated such that they can produce said desired values of body forces and/or torques. In an intermediate stage the requested tire forces (F_FL_x_req, ..., F_RR_z_req) may be calculated by the vehicle motion controller.
摘要:
A method and apparatus for dynamically leveling the attitude of a vehicle (102) using a low power fully active suspension system (100). The system (100) connects the front and rear suspensions (114 and 104) and body (103) of the vehicle (102) and includes a hydraulic damper (110) having a pressure cylinder (144) forming a working chamber (146) in which a piston and rod assembly (148) is movably disposed. The system (100) further comprises a flow control device (130) fluidly communicating with the working chamber (146) on one side of the piston (148) for adding and exhausting damping fluid therefrom to a central pressure source (132), and an accumulator (128) fluidly communicating with the working chamber (146) on the opposite side of the piston (148). The system (100) having flow restriction valving (156) for selectively controlling the flow of fluid with said working chamber (146). The flow restriction valving (156) located between the flow control device (130) and the accumulator (128). The lower power fully active suspension system (100) is adapted to produce a desired suspension force output through selective actuation of the flow control device (130) and the flow restriction valving (156) for limiting the duty cycle and power requirements of the central pressure source (132).
摘要:
Die Erfindung betrifft ein Verfahren zur Steuerung der Niveauregulierung eines Fahrzeugaufbaus eines Kraftfahrzeuges, Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Steuerung der Niveauregulierung eines Fahrzeugaufbaus eines Kraftfahrzeuges zu schaffen, mit dem auf einfache Weise und ohne aufwendige Nachkorrigierung ein vorgegebener Sollwert eingestellt werden kann. Erfindungsgemäß wird bei einer ermittelten notwendigen Änderung des Höhenniveaus durch ein Reglungssystem die Betätigungszeit der Ventile zur Durchführung des Höhenänderungsvorganges anhand der im Fahrzeug hinterlegten und speziell für den Fahrzeugtyp ermittelten Hebe- und Absenkkennlinien des Luftfedersystems eingestellt. Dabei wird bei einer durch einen Höhensensor ermittelten Unterschreitung eines vorgegebenen Höhenniveaus dem Luftfedersystem durch die regelbare Ventileinstellung ein Druckmittel zugeführt. Bei einer Überschreitung eines vorgegebenen Höhenniveaus wird aus dem Luftfedersystem durch die regelbare Ventileinstellung ein Druckmittel zur Absenkung des Fahrzeugaufbaus abgelassen.
摘要:
A vehicle (20) with an actively adjustable axle system (86) suitable for traveling over even or uneven terrain with a load is herein proposed. The vehicle includes a frame having a front end (80), a rear end (82), and a fore-aft axis (84) extending therebetween; a body mounted to the frame (22); an adjustable axle assembly mounted to the frame such that the adjustable axle assembly is aligned substantially orthogonal to the fore-aft axis; a pair of wheels (56) rotatably mounted on the ends of the adjustable axle assembly such that the wheels are aligned substantially in parallel and are thereby capable of facilitating moving interaction with the ground; at least one supplemental ground-interacting apparatus mounted to the frame such that each supplemental ground-interacting apparatus cooperates with the pair of wheels to thereby maintain clearance between both the frame and the body and the ground; an actuation system (90) capable of mechanically adjusting the adjustable axle assembly to thereby adjust the fore-aft position of the pair of wheels relative to both the frame and the body; and an electronic controller mounted to the body and electrically connected to the actuation system. In such a configuration, the electronic controller is capable of communicating electrical control signals to the actuation system (90) to thereby adjust the fore-aft position of the pair of wheels as necessary to actively maintain the fore-aft stability of the vehicle.
摘要:
An unsprung state detection part (140) calculates a variation amount X (=|(ϕ-ϕ'|), which is a magnitude of a difference between a detected angle ϕ output from a resolver rotational angle sensor (40) for detecting a rotational angle of an in-wheel motor (30) and an estimated angle ϕ' of a motor rotational angle (S11 to S13). The estimated angle ϕ' can be calculated by adding an estimated angle of the rotation of the motor (30) in one calculation cycle to a detected angle ϕn-1 of the previous calculation cycle. When the variation amount X is more than a road surface determination threshold Xref, the unsprung state detection part (140) determines that the travel road on which a vehicle (1) is traveling is a rough road (S14, S15). As a result, the road surface determination can be made by using the rotational angle sensor (40).
摘要:
There is provided a rotation angular speed detection apparatus (11) capable of detecting a rotation angular speed to reduce an error when the rotation angular speed for rotating a rotating body is low. A rotation angular speed detection apparatus (11) comprises: a receiving part (12) for receiving a rotation angle at predetermined time intervals from a rotation angle sensor (17) for detecting a rotation angle of a rotating body (16); a storage part (13) for storing the received rotation angle; and a control part (14) for detecting a rotation angular speed from the rotation angles stored in the storage part (13); wherein when a difference between a first arbitrary angle stored and a second angle stored before the first angle is less than a predetermined value, the control part determines, from the rotation angles stored in the storage part, a third angle in which a difference between the first angle and the third angle is more than the predetermined value, and wherein the control part divides the difference between the first angle and the third angle by the time required from storing of the third angle to storing of the first angle so as to detect a rotation angular speed.
摘要:
There is provided a rotation angular speed detection apparatus (11) capable of detecting a rotation angular speed to reduce an error when the rotation angular speed for rotating a rotating body is low. A rotation angular speed detection apparatus (11) comprises: a receiving part (12) for receiving a rotation angle at predetermined time intervals from a rotation angle sensor (17) for detecting a rotation angle of a rotating body (16); a storage part (13) for storing the received rotation angle; and a control part (14) for detecting a rotation angular speed from the rotation angles stored in the storage part (13); wherein when a difference between a first arbitrary angle stored and a second angle stored before the first angle is less than a predetermined value, the control part determines, from the rotation angles stored in the storage part, a third angle in which a difference between the first angle and the third angle is more than the predetermined value, and wherein the control part divides the difference between the first angle and the third angle by the time required from storing of the third angle to storing of the first angle so as to detect a rotation angular speed.
摘要:
Bei bisherigen fahrdynamischen Stabilitätsregelungen werden zur Erfassung des Neigungswinkels einer seitlich geneigten Kurve zusätzliche Sensoren benötigt. Das neue Verfahren bzw. Vorrichtung soll es ermöglichen, den Neigungswinkel mit bereits vorhandenen Sensoren zu erfassen. Bei diesem Verfahren bzw. dieser Vorrichtung wird aus der Drehrate, der Querbeschleunigung und der Fahrzeuggeschwindigkeit der Neigungswinkel der Kurve berechnet. Dieses Verfahren bzw. die Vorrichtung eignet sich für fahrdynamische Stabilitätsregelungen, die ohne zusätzliche Sensoren den Neigungswinkel einer seitlich geneigten Kurve messen und diesen in ihre Berechnungen mit einbeziehen.