Abstract:
Disclosed is a method and a system for determining a cornering angle (α) of a tyre (11) fitted on a vehicle during a running of said vehicle on a rolling surface, the tyre comprising an equatorial plane, the method comprising the steps of: estimating a length (Pli/e) of a contact region between said tyre and said rolling surface, said length being measured at a distance from the equatorial plane; estimating a load (Fz) exerted on said tyre; estimating a camber angle (γ) to which said tyre is subjected; and deriving such cornering angle (α) from said camber angle (γ), tyre load (Fz) and contact region length (PLi/e).
Abstract:
It is disclosed a method and system for monitoring deformations in a tyre of a vehicle wheel, the wheel comprising the tyre and a rim. The method comprises the steps of: a) providing the wheel with at least two magnetic field emitters (101-a, 101-b) in mutual positions so as to yield a composite magnetic field having at least a space portion where at least a component of the composite magnetic field is substantially null, at least one of the at least two magnetic field emitters being positioned in contact with the tyre; b) positioning at least one main magnetic field sensor (102) substantially in said space portion; c) monitoring variation of said at least one component of the composite magnetic field; and d) correlating said variation with tyre deformations.
Abstract:
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Optimierung des Regelverhaltens einer Fahrdynamikregelung (15,12) bei Kraftfahrzeugen. Ein verbessertes Regelverhalten kann dadurch erreicht werden, dass eine Information über eine Reifeneigenschaft, wie z.B. der Reifentyp, die Reifenart, der Reifendruck, die Reifentemperatur, der Reifenzustand oder das Reifenalter, bereitgestellt und die Reifeninformation an eine Einrichtung (12) einer Fahrdynamikregelung übertragen und von dieser bei der Regelung berücksichtigt wird.
Abstract:
A method of controlling an advanced chassis control system of a vehicle such as an anti-lock brake system, traction control system, vehicle stability control system, or roll control system affecting the vehicle dynamic performance and safety is disclosed. A control unit controls the operation of the advanced chassis control system based at least in part upon predictions of force generating characteristics of tires of the vehicle and driver input signals. The advanced chassis control system of the vehicle is controlled in one manner the tire is determined to be inflated, controlled in another, different manner if the tire id determined to be deflated. During normal driving, the chassis control systems can operate to control the vehicle according to the desire of the driver vehicle accounting for at least one tire being deflated. During braking the controller can act to distribute braking forces in order to divert forces from the deflated tire to the inflated tires.
Abstract:
A method for monitoring the behavior of a tyre during running, the method comprising the steps of: acquiring and storing, at least temporarily, a first curve representing the acceleration profile of a first point of the tread area of said tyre, located on a meridian plane of said tyre; acquiring and storing, at least temporarily, at least a second curve representing the acceleration profile of a second point of the tread area of said tyre, located substantially on said meridian plane; comparing said first and second curves, or parameters derived thereof; determining the behavior of said tyre from said comparison.
Abstract:
La méthode proposée comporte les étapes suivantes: sélectionner plusieurs points fixes dans l'espace, situés à des azimuts différents le long de la circonférence dans au moins un flanc du pneu, effectuer autant de mesures de variation de distance circonférentielle (extension ou contraction) à ces points fixes lorsque le pneu roule sur la chaussée, traiter les signaux de mesure de façon à en extraire les trois composantes d'une résultante d'efforts exercés par la chaussée sur l'aire de contact d'un pneumatique et le couple d'auto-alignement généré par le pneu, traiter les signaux d'évaluation des trois composantes d'une résultante d'efforts exercés par la chaussée sur l'aire de contact d'un pneumatique et du couple d'auto-alignement généré par le pneu de façon à en extraire ledit coefficient d'adhérence µ.
Abstract:
Die Erfindung betrifft ein Verfahren zur Verbesserung des Re-gelverhaltens eines geregelten Kraftfahrzeugbremssystems, insbesondere eines Antiblockierbremssystems (ABS), einer Fahrstabilitätsregelungssystems (ESP) oder eines um andere Funktionalitäten erweiterten Bremssystems, wobei radindividuell als Kriterium für die Initiierung einen Regeleingriffs bewertete Raddynamikinformationen (dyn) und bewertete Radschlupfinforma-tionen (slip) herangezogen, und summarisch mit einer Regelschwelle (ψ) verglichen werden. Zur verbesserten Gewichtung von Raddynamik und Schlupf wird vorgeschlagen, fahrzustandsabhängig veränderbare Bewertungs-größen (α, β) zu ermitteln und für die Bewertung der Raddynamikinformationen (dyn) und für die Bewertung der Radschlupfinformationen (slip) heranzuziehen.
Abstract:
For acquiring data of dynamic physical processes via a radio link, a transponder antenna (17) is excited by an electromagnetic exciting wave at the resonance frequency of the transponder antenna (17), and a back-scattered electromagnetic sensor wave which is modulated by a sensor (16) having an electrical impedance dependent of the data to be acquired is received an analysed. The sensor (16) is directly connected to the transponder antenna (17) so that the sensor changes the eletrical impedance of the transponder antenna (17) with every variation of the data to be acquired. The electromagnetic wave which is back- scattered by the transponder antenna (17) is received as the sensor wave at the same time as the transponder antenna (17) is excited by the exciting wave.
Abstract:
A method, computer program product and apparatus for estimating the pneumatic pressure of a tire on a vehicle, comprising the steps of: receiving as an input a vehicle status sensor signal; estimating first parameter values of an adaptive filter based on a predetermined model on the vehicle status dependent on the vehicle status sensor signal; calculating, dependent on said first model parameter values, a first tire pressure indication value ( delta ) being dependent on and indicative of the pneumatic pressure of the tire. Specifically, the vehicle status signal may be an input a wheel angular velocity signal (1) and a lateral movement indication signal; the adaptive filter is based on a predetermined model on lateral vehicle dynamics dependent on the angular velocity of said wheel and the lateral movement of said vehicle.