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Method for determining an axle load on a mechanically suspended vehicle

A technology for axles and vehicles, which is applied in the field of axle loads and can solve problems such as inaccurate display of axle loads

Pending Publication Date: 2021-11-26
ZF CV SYST HANNOVER GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the vehicle is only lightly loaded, the display of axle loads is relatively inaccurate across the entire load range, especially in the low load range, and immediately after loading or unloading

Method used

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  • Method for determining an axle load on a mechanically suspended vehicle
  • Method for determining an axle load on a mechanically suspended vehicle
  • Method for determining an axle load on a mechanically suspended vehicle

Examples

Experimental program
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Embodiment Construction

[0043] figure 1 The leveling device 1 of a vehicle shown in simplified form, eg an ECAS system of a truck, has two adjustable air spring elements 3a, 3b configured as bellows, which spring for a body, not shown It is supported relative to the air-suspended first axle 2 . On the other hand, the mechanically suspended second axle 4 is supported relative to the body via two steel spring elements 5a, 5b. Steel spring elements 5a, 5b are in figure 1 are indicated symbolically as helical compression springs only. These can be helical compression springs or leaf springs or spring assemblies consisting of several individual springs. Therefore, the mechanical suspension can be a helical compression spring suspension or a leaf spring suspension. Independently of their suspension, the axles 2 , 4 can each be designed as front or rear axles. according to figure 1 The truck is only to be understood as an example vehicle. Described vehicle axle 2,4 also can be arranged on the trailer...

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Abstract

The invention relates to a method for determining an axle load on a mechanically suspended vehicle by means of a travel measurement device (9), a control unit (10) and an algorithm stored in the control unit. With regard to a mechanically suspended vehicle axle (4), a test routine is first carried out in which a level signal of a travel measurement device arranged on the vehicle is detected and evaluated, wherein: in a vehicle loading process, a loading curve (F_i) is determined that specifies the level measured with the travel measurement device subject to the increasing axle load; and in a vehicle unloading process, an unloading curve (F_u) is determined that specifies the level measured with the travel measurement device (9) subject to the decreasing axle load and in which an averaged load-distance characteristic curve (F_m) is calculated from the values of the two curves, the values of which load-distance characteristic curve are stored in the control unit. After each vehicle start, after a lower vehicle speed limit (v_min) has been exceeded, an axle load determination routine, which is cyclically repeated during the journey, is carried out in which during a predefined time period ([delta]t), the axle load values are continuously determined with the averaged load-distance characteristic curve (F_m), and an axle load average value is calculated from the axle load values determined during the time period and this axle load average value is displayed as the current axle load value.

Description

technical field [0001] The invention relates to a method for ascertaining the axle load on a mechanically suspended vehicle by means of a displacement measuring device, an electronic control unit and an algorithm stored in the control unit. Background technique [0002] The knowledge of the axle load on the vehicle, ie the gravitational force acting on the axle resulting from the sum of its own weight and the load weight, is used to display and monitor the loading state of the vehicle. As a result, safety-threatening overloading and unfavorable weight distribution on the vehicle are avoided. Overload displays are already mandatory in commercial vehicles and will also be installed in the future. Therefore, in the future, the total weight of a vehicle should be detected with a resolution of 100 kg or more and with an accuracy of at least ±5% when the vehicle is loaded with more than 90% of the allowable total weight. Furthermore, the first weight value should be provided no ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60G17/016B60G17/017G01G19/08
CPCB60G17/0161B60G17/0162B60G17/017B60G2300/02B60G2400/252B60G2400/60B60G2400/104G01G19/08B60G17/0155B60G17/019
Inventor 约翰·卢卡斯安德烈亚斯·蒂姆塞巴斯蒂安·杰米斯布里塔·沃内克
Owner ZF CV SYST HANNOVER GMBH
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