Vehicle reference velocity determination method for brake-by-wire braking system providing mean value of velocity values calculated by different methods

The reference velocity determination method has the rev values provided by wheel sensors for each of the braked wheels, the acceleration value provided by at least one longitudinal acceleration sensor and the signals provided by braking pressure sensors for the wheel brakes used for calculation of t...

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Bibliographic Details
Main Authors RIETH, PETER E, ISERMANN, ROLF, SCHWARZ, RALF, SEMMLER, SASCHA
Format Patent
LanguageEnglish
German
Published 16.10.2003
Edition7
Subjects
ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL
BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL
CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION
CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES
PERFORMING OPERATIONS
PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES
ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT
TRANSPORTING
VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF
VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
VEHICLES IN GENERAL
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Summary:The reference velocity determination method has the rev values provided by wheel sensors for each of the braked wheels, the acceleration value provided by at least one longitudinal acceleration sensor and the signals provided by braking pressure sensors for the wheel brakes used for calculation of the vehicle velocity using at least 2 different methods. The individual velocity values are differently weighted before being used for providing a mean value used as the vehicle reference velocity, the weighting factors determined from the travel situation. Die Erfindung beruht auf dem Problem, in einfacher Weise die Fahrzeugreferenzgeschwindigkeit zu bestimmen. Dazu sieht die Erfindung vor, dass aus den zur Verfügung stehenden Sensorsignalen auf unterschiedlichen Berechnungswegen (2, 3, 4) mehrere vorläufige Einzelwerte für die Fahrzeuggeschwindigkeit ermittelt werden. Aus diesen wird in einem Berechnungsblock (12), nachdem sie mit Gewichtsfaktoren, die durch den Block (9) je nach Fahrsituation zur Verfügung gestellt werden, bewertet worden sind, die Fahrzeugreferenzgeschwindigkeit V¶Fahrzeug¶ als Mittelwert gebildet. Wenigstens eine Berechnung (Block (2)) beruht dabei auf einer Abschätzung der in den Rädern wirkenden Längskräfte.
Bibliography:Application Number: DE2002159272