DETERMINATION OF THE MASS OF A VEHICLE
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Accused Products
Abstract
A method and device for provisionally determining the mass of a vehicle when it is initialized. After initialization of the vehicle, the method determines a vehicle mass value by a static mass determination method and then checks whether this value is within a predetermined tolerance band around the dynamically last-determined vehicle mass value, which has been stored for that purpose. If this is so, and there has in the meantime been no significant change of the vehicle'"'"'s mass, the previously stored dynamic vehicle mass value is probably more accurate and is used in the determination. Otherwise it can be assumed that the vehicle mass value has changed substantially, and the statically determined vehicle mass value is therefore used until a device for the dynamic determination of a vehicle mass can supply a more accurate vehicle mass value after a short time.
18 Citations
26 Claims
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1-13. -13. (canceled)
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14. A method for provisional determination of a mass of a vehicle (1) on initialization, in which the vehicle (1) comprises a control unit (2) which, on a basis of dynamic movement data of the vehicle (1), determines a current vehicle mass value, and the control unit storing a last dynamically determined vehicle mass value in a data memory (12) when the control unit (2) is de-initialized, and either on or immediately after the initialization of the control unit (2), the control unit (2) reads in the last-determined dynamic vehicle mass value stored in the data memory, the method comprising the steps of:
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determining an axle load of at least one rear axle of the vehicle (1), with the control unit (12), using a static method by reading in at least one physical measured value that correlates with the axle load of the at least one rear axle; determining a statically determined vehicle mass value on a basis of the at least one physical measured value; comparing the statically determined vehicle mass value with the dynamically determined vehicle mass value; adopting the statically determined vehicle mass value as the relevant vehicle mass value, if the statically determined vehicle mass value differs by more than a predetermined tolerance range from the last dynamically determined mass value; and defining the relevant vehicle mass value as the last dynamically determined vehicle mass value, if the statically determined vehicle mass value is within predetermined tolerance range. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 26)
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23. A device for implementing a method of determining a mass of a vehicle (1) on initialization, the device comprising:
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a control unit (2) comprising a device (11) for determining a dynamic vehicle mass value based on read-in dynamic movement data of the vehicle (1); a data memory (12) for storing a last dynamically determined vehicle mass value when the control unit is de-initialized; the control unit (2) being designed such that when or immediately after the control unit (2) is initialized, the previously stored, last dynamically determined vehicle mass value is read from the data memory (12) into a comparison device (15) of the control unit (2); at least one sensor (9) for determining an axle load of at least one rear axle of the vehicle and the sensor (9) being in signal-transmitting connection with the control unit (2) such that a device (13) of the control unit (2) for static determination of a static vehicle mass value is read in the sensor value from the sensor (9); the control unit (2) being designed such that a static vehicle mass value previously determined by the device for statically determining the static vehicle mass value, is also read into the comparison device (15) of the control unit (2); the comparison device (15) determines whether the static vehicle mass value determined is within a predeterminable tolerance band around the read-in dynamic mass value; the control unit having an output device (16) such that if a static vehicle mass value is within the tolerance band, the last dynamically determined vehicle mass value is transmitted as a relevant mass value to the control unit (2), and if a static vehicle mass value is outside the tolerance band, the statically determined vehicle mass value is transmitted as the relevant mass value to the control unit (2); and the relevant mass value is held in readiness by either the control unit (2) or the output device (16), to be read out by at least one other control unit (5, 6), until the device (11) for the dynamic determination of the vehicle mass value is available to supply an updated dynamic mass value. - View Dependent Claims (24, 25)
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Specification