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Automotive shop service apparatus having means for determining the rolling resistance coefficient of a tyre

A technology for service equipment and driving devices, applied in tire installation, measuring devices, tire parts, etc., to achieve reliable and accurate rolling resistance coefficients, eliminate parasitic effects, and accurate rolling resistance coefficients

Active Publication Date: 2014-10-22
SNAP ON EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fuel efficiency ratings for tires are determined by large and expensive testing facilities in specialized laboratories

Method used

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  • Automotive shop service apparatus having means for determining the rolling resistance coefficient of a tyre
  • Automotive shop service apparatus having means for determining the rolling resistance coefficient of a tyre
  • Automotive shop service apparatus having means for determining the rolling resistance coefficient of a tyre

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Embodiment Construction

[0038] It should be noted that the drawings are not true to scale, but merely serve to illustrate the principles of the invention. In other words, distances, sizes and ratios of components described in the drawings may vary within the spirit of the invention. Furthermore, in the description of the following preferred embodiments of the present invention, the terms left, right, top, bottom, etc. related to the drawings should be interpreted as directions in which the reference numerals located in the drawings can be read. These terms should not be related to any position or orientation relative to the overall device in a limiting manner, but merely to facilitate understanding of the invention.

[0039] First explain about Figure 10 The physics of how a tire rolls on a flat surface such as a road. When ordinary tires roll on a flat, hard surface such as a road, due to deformation of the tire at the contact portion (tyre / road interface, see Figure 9 In deformation δ), tire d...

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PUM

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Abstract

A vehicle wheel service apparatus, in particular a wheel balancer or a tyre changer, comprising a load means (26, 126) for applying a predetermined load onto a peripheral surface of a wheel / tyre assembly (14), a sensor device (30) arranged to determine forces acting between the peripheral surface of the wheel / tyre assembly (14) and the load means (26, 126), wherein the forces comprise at least a first force acting in a radial direction of the wheel / tyre assembly (14) and a second force acting in a circumferential direction of the wheel / tyre assembly (14), and an evaluation device arranged to determine a rolling resistance coefficient of the tyre (10) on the basis of the first and second forces.

Description

technical field [0001] The present invention relates to the field of auto shop service machines, such as wheel balancers, tire changers, roller test stands, etc., and in particular to a machine with a device for determining the coefficient of rolling resistance of a motor vehicle tire or wheel (tyre / rim assembly) Auto shop service machine. Background technique [0002] A tire changer and a method for mounting and / or removing tires from the rim of a vehicle wheel are known from patent EP2110270A1. The tire changer comprises at least one installation and / or removal tool movably attached to the strut. At least one installation and / or removal tool can be positioned in such a way that the tire can be installed on or removed from the rim without damaging the rim. [0003] It is also known from patent WO 2011 / 101006 A1 to provide a tire changer with loading rollers for measuring the radial and / or lateral forces acting between the tire and the loading rollers exerting a controllab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/02B60C25/132
CPCG01M17/022B60C25/138
Inventor F·布拉格希罗利M·特拉里
Owner SNAP ON EQUIP
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