Method for determining the mass of a motor vehicle while taking into account different driving situations
First Claim
1. A method for determining the mass of a motor vehicle, comprising the steps of:
- determining a vehicle acceleration from at least a time differential of vehicle speed, a slope descending angle and a rolling resistance coefficient;
determining vehicle forces, wherein the vehicle forces includea driving force of a vehicle drive unit,resistance forces resulting from rotational forces and air resistance, anda braking force;
dividing the vehicle forces by the vehicle acceleration to obtain a vehicle mass value,obtaining a plurality of vehicle mass values from a plurality of driving situations;
storing each of the plurality of vehicle mass values, anddetermining a collective mass value from the stored plurality of vehicle mass values, wherein the plurality of vehicle mass values obtained from the plurality of driving situations are weighted differently.
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Abstract
A method for determining the mass of a motor vehicle while taking different driving situations into consideration, involving an evaluation of a vehicle acceleration, wherein apart from a driving force of a vehicle drive unit, resistance forces resulting from rotational forces, air resistance, rolling resistance, the slope descending force and a braking force are taken into consideration. Additionally, a multitude of different driving situations may be evaluated, wherein the individual results are stored and combined suitably into a collective mass value. Further, different driving situations can be weighted differently in determining the mass value.
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Citations
12 Claims
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1. A method for determining the mass of a motor vehicle, comprising the steps of:
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determining a vehicle acceleration from at least a time differential of vehicle speed, a slope descending angle and a rolling resistance coefficient; determining vehicle forces, wherein the vehicle forces include a driving force of a vehicle drive unit, resistance forces resulting from rotational forces and air resistance, and a braking force; dividing the vehicle forces by the vehicle acceleration to obtain a vehicle mass value, obtaining a plurality of vehicle mass values from a plurality of driving situations; storing each of the plurality of vehicle mass values, and determining a collective mass value from the stored plurality of vehicle mass values, wherein the plurality of vehicle mass values obtained from the plurality of driving situations are weighted differently. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification