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AssigneeRobert Bosch GmbH
InventorAndreas Erban
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The invention relates to a method and a device for determining a variable describing the speed (VwheelDef)of at least one driven wheel (1, 2, 3, 4) of a motor vehicle. In this context, variables describing the respective wheel speeds (Vwheeli)for the remaining driven wheels of the motor vehicle, and a variable describing the output rpm (noutput) of a transmission (5) of the motor vehicle are determined. To be able to make a reliable variable describing the speed magnitude of the wheel (1, 2, 3, 4) available to a traction control system or a vehicle-dynamics control system of a motor vehicle in spite of the failure of a speed sensor (9, 10, 11, 12) arranged at one of the wheels, it is proposed that the variable describing the speed (VwheelDef) for the at least one driven wheel (1, 2, 3, 4) be determined as a function of the variables which describe the respective wheel speeds (Vwheeli) of the remaining driven wheels and as a function of the variable which describes the transmission output rpm (noutput).
A method for determining a variable describing the speed (VwheelDef) of at least one driven wheel (1, 2, 3, 4) of a motor vehicle, in which the variables describing the respective wheel speeds (Vwheeli) for the remaining driven wheels of the motor vehicle and a variable describing the output rpm (noutput) of a transmission (5) of the motor vehicle are determined, wherein the variable describing the speed (VwheelDef) for the at least one driven wheel (1, 2, 3, 4) is determined as a function of the variables which describe the respective wheel speeds (Vwheeli) of the remaining driven wheels, and as a function of the variable which describes the transmission output rpm (noutput).
A device for determining a variable describing the speed (VwheelDef) of at least one driven wheel (1, 2, 3, 4) of a motor vehicle, the device having means (9, 10, 11, 12) for determining variables for the remaining driven wheels of the motor vehicle which describe the respective wheel speeds (Vwheeli), and means (13) for determining a variable which describes the output rpm (noutput) of a transmission (5) of the motor vehicle, wherein the device determines the variable describing the speed (VwheelDef) for the at least one driven wheel (1, 2, 3, 4) as a function of the variables which describe the respective wheel speeds (Vwheeli) of the remaining driven wheels, and as a function of the variable which describes the transmission output rpm (noutput).
A control unit (14) for a traction control system or a vehicle-dynamics control system of a motor vehicle which, to control the drive slip and/or the vehicle dynamics, determines a variable describing the speed (VwheelDef) of at least one driven wheel (1, 2, 3, 4) of the motor vehicle;
Dependencies are inferred from the claim text.