Device and method for determining a tachometer characteristic curve of a vehicle, system for controlling the speed of a vehicle and vehicle
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorsOliver Fritsch, Christian Rathgeber, Franz Winkler
Life of this patent
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Abstract
A device for determining a tachometer characteristic curve of a motor vehicle includes a detection apparatus and a determining apparatus. The determining apparatus is configured to form a tachometer characteristic curve on the basis of one or more mean value pairs, which are formed by means of one locomotion signal mean value and one speed mean value, by means of which tachometer characteristic curve locomotion signals and speed values are converted into one another, and/or to change a tachometer characteristic curve which is already present.
Claims9
A method for determining a tachometer characteristic curve of a motor vehicle, the method comprising the acts of:
- detecting locomotion of the vehicle and converting the detected locomotion into corresponding locomotion signals;
- deriving speed values, which characterize the speed of the vehicle, from the locomotion signals;
- determining a locomotion signal mean value from the locomotion signals obtained in at least one time window in which a fluctuation of the locomotion signals and/or of the speed values lies within a predefined fluctuation range;
- determining a speed mean value from the speed values which have been derived from the locomotion signals obtained in the at least one time window;
- and
- forming a tachometer characteristic curve which converts locomotion signals and speed values into one another, and changing an already present tachometer curve on the basis of one or more mean value pairs which are formed by one locomotion signal mean value and speed mean value, wherein
- the first iteration of the method uses a predefined characteristic curve as the already present tachometer curve.
A device for determining a tachometer characteristic curve of a motor vehicle, comprising:
- a detection apparatus which is configured to detect locomotion of the motor vehicle and convert it into corresponding locomotion signals;
- and
- a determining apparatus which is configured
- to derive speed values from the locomotion signals on the basis of a predefined fluctuation range at the start of a recursive method,
- to derive speed values from the locomotion signals, which speed values characterize the speed of the vehicle,
- to determine a locomotion signal mean value from the locomotion signals which are obtained in at least one time window in which a fluctuation of the locomotion signals and/or of the speed values lies within a predefined fluctuation range,
- to determine a speed mean value from the speed values which have been derived from the locomotion signals obtained in the at least one time window, and
- to form a tachometer characteristic curve on the basis of one or more mean value pairs, which are formed by means of one locomotion signal mean value and one speed mean value, by means of which tachometer characteristic curve locomotion signals and speed values are converted into one another, and to change a tachometer characteristic curve which is already present.
Dependencies are inferred from the claim text.