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Method and device for determining travelane state of vehicle, computer program

A lane and state technology, applied in the field of computer programs, can solve problems such as the inability to estimate the road friction coefficient, achieve high reliability, low computing overhead, and improve accuracy

Pending Publication Date: 2019-05-03
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Conversely, in the case of free rolling (i.e. no acceleration or deceleration), the coefficient of road friction cannot be estimated

Method used

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  • Method and device for determining travelane state of vehicle, computer program
  • Method and device for determining travelane state of vehicle, computer program
  • Method and device for determining travelane state of vehicle, computer program

Examples

Experimental program
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Embodiment Construction

[0046] figure 1 A graph representing tire characteristic curves 100 , 102 , 104 , 106 for a method according to an exemplary embodiment is shown. Four tire characteristic curves 100 , 102 , 104 , 106 are shown by way of example, which are each based on a model for representing the adhesion (represented by the coefficient of friction μ plotted on the y-axis) and the wheel slip λ ( The model function of the correlation plotted on the x-axis. A first tire characteristic curve 100 for high adhesion, a second tire characteristic curve 102 for medium adhesion, a third tire characteristic curve 104 for adhesion on wet cobblestones and a wet ceramic covering are shown as examples. The attached fourth tire characteristic curve 106 on .

[0047] The basis for the road state classification proposed here is, for example, a tire model whose initial parameterization is determined once from the input (eingefahrene) measurement data, but is preferably provided by the tire manufacturer so t...

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Abstract

The invention relates to a method for determining a state of a roadway of a vehicle. A first distance value 302 of a measurement coordinate 300 to a first tire characteristic curve 100 associated witha first state of the roadway is ascertained. A second distance value 304 of the measurement coordinate to a second tire characteristic curve 102 associated with a second state of the roadway is ascertained. The measurement coordinate represents a measurement carried out using at least one vehicle sensor of a presently utilized traction between wheels of the vehicle and the roadway and a wheel slip of the wheels, while the first tire characteristic curve and the second tire characteristic curve are based on a model function for the modeled representation of the traction as a function of the wheel slip. An output signal representing the state of the roadway is output using the first distance value and the second distance value.

Description

technical field [0001] The invention starts from a method or a device for determining the state of a roadway of a vehicle. The subject of the invention is also a computer program. Background technique [0002] For future, more highly automated functions, the vehicle should be able to handle critical situations independently, even without the assistance of the driver. Ideally, therefore, the vehicle should prevent critical situations preventively. Here, the topic "Internet of Vehicles" plays an important role. Even today, connected vehicles can significantly improve driving comfort and driving safety by preventing and predicting events and conditions. [0003] In motor vehicles, the currently available adhesion potential can be estimated with the aid of existing sensor systems and existing models consisting of the ESP system and the steering system. In the case of acceleration or deceleration, the fully utilized (ausgenutzt) friction coefficient can be ascertained by mean...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W40/068B60W40/064
CPCB60W40/068B60W2520/26B60W2520/30B60W40/12
Inventor N·哈根洛赫T·奥伯哈特
Owner ROBERT BOSCH GMBH
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