초록 ▼

A method and a system for ascertaining a mass value representing the vehicle mass of a motor vehicle, particularly of a commercial vehicle, having a drive unit. An acquisition at least of a first and a second acceleration value is provided for this determination. These acceleration values represent

A method and a system for ascertaining a mass value representing the vehicle mass of a motor vehicle, particularly of a commercial vehicle, having a drive unit. An acquisition at least of a first and a second acceleration value is provided for this determination. These acceleration values represent the vehicle acceleration at a first and a second point of time. Further, at least one first and one second drive value are acquired. These drive values represent the drive force or the drive torque of the drive unit at the first and the second point of time. At least as a function of the acquired acceleration values and the acquired drive values, at least a first and a second driving-resistance value are then determined. The mass value is ascertained at least as a function of a comparison of the determined first driving-resistance or mass estimated value to the determined second driving-resistance or mass estimated value. A roadway slope is detected using the comparison, whereby an erroneous mass determination caused by the roadway slope is avoided.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method for determining a vehicle mass value representing a vehicle mass of a motor vehicle having a drive unit, the method comprising the steps of:(a) determining at least one first acceleration value indicative of a vehicle acceleration at a first time and at least o

[ What is claimed is:] [1.]1. A method for determining a vehicle mass value representing a vehicle mass of a motor vehicle having a drive unit, the method comprising the steps of:(a) determining at least one first acceleration value indicative of a vehicle acceleration at a first time and at least one second acceleration value indicative of the vehicle acceleration at a second time;(b) determining at least one first drive value and at least one second drive value, the at least one first drive value being indicative of one of a first drive force and a first drive torque of the drive unit at the first time, the at least one second drive value being indicative of one of a second drive force and a second drive torque of the drive unit at the second time;(c) determining at leasta first ascertained value corresponding to at least one of a first driving resistance and a first mass estimated value, anda second ascertained value corresponding to at least one of a second driving resistance and a second mass estimated value, first and second ascertained values being determined at least as a function of the at least one first and second acceleration values and the at least one first and second drive values;(d) determining a roadway slope as a function of a difference between the first ascertained value and the second ascertained value; and(e) comparing the roadway slope to at least one of the first ascertained value and the second ascertained value to determine the vehicle mass value.