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Car tire snow surface gripping performance test evaluation method

A technology of car tires and evaluation methods, which is applied in the direction of car tire testing, etc., and can solve the few problems such as car tire snow grip performance test and evaluation methods

Inactive Publication Date: 2019-03-26
CATARC AUTOMOTIVE TEST CENT TIANJIN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there have been researches on the test method of tire grip performance on wet and slippery ground in rainy days, but there are few test evaluation methods for car tire grip performance on snow surface

Method used

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  • Car tire snow surface gripping performance test evaluation method
  • Car tire snow surface gripping performance test evaluation method
  • Car tire snow surface gripping performance test evaluation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0163] FAW-Volkswagen Sagitar (model: FV7146BBDBG, type: M1) was used as the test vehicle, tire A was used as the reference tire, tires B and C were used as test tires, and R 1 -T-R 2 In the cycle test mode, the braking performance test is shown in Table 4, and the R 1 -T 1 -T 2 -R 2 The braking performance test in the cycle test mode is shown in Table 5:

[0164] Table 4 R 1 -T-R 2 Braking performance test data in cycle test mode

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[0167] Table 5 R 1 -T 1 -T 2 -R 2 Braking performance test data in cycle test mode

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[0169]

[0170] It can be seen from Tables 4 and 5 that the snow grip performance index SGI of the test tire relative to the reference tire B Both are larger, indicating that the test tire has better snow grip performance than the reference tire. Of course, the higher the value, it shows that the test tire has more advantages than the reference tire in terms of snow braking grip performance.

Embodiment 2

[0172]FAW-Volkswagen Sagitar (model: FV7146BBDBG, type: M1) was used as the test vehicle, tire A was used as the reference tire, tires B and C were used as test tires, and R 1 -T-R 2 In the cycle test mode, the acceleration performance test is shown in Table 6, R 1 -T 1 -T 2 -R 2 The accelerated performance test in the cycle test mode is shown in Table 7:

[0173] Table 6 R 1 -T-R 2 Cycle test mode to speed up test data

[0174]

[0175]

[0176] Table 7 R 1 -T 1 -T 2 -R 2 Cycle test mode to speed up test data

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[0178]

[0179] It can be seen from Tables 6 and 7 that the snow grip performance index SGI of the test tire relative to the reference tire A Both are larger, indicating that the test tire has better snow grip performance than the reference tire. Of course, the higher the value, it shows that the test tire has more advantages than the reference tire in terms of snow surface acceleration grip performance.

[0180] The test and evaluatio...

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Abstract

The invention discloses a car tire snow surface gripping performance test evaluation method, which comprises the following steps: 1, mounting a test tire and a reference tire on a test vehicle for cycle tests, wherein the reference tire is used for the initial test and the termination test of the cycle tests and one or more test tires are used in the intermediate test; 2, controlling the test vehicle to linearly travel to a specified snow surface test area at a vehicle speed not lower than 53km / h, performing neutral gear travel and rapid braking to activate an anti-lock braking system, and obtaining the braking deceleration of the test vehicle from 50km / h to 5km / h; 3, obtaining the effective average values of the average braking deceleration and the average braking deceleration of the testtire and the reference tire, and obtaining the standard deviation of the average braking deceleration of the test tire and the reference tire; and 4, obtaining the snow surface braking gripping performance index SGIB of the test tire relative to the reference tire.

Description

technical field [0001] The invention relates to the field of car tire testing, in particular to a test evaluation method for car tire gripping performance on snow. Background technique [0002] Tires are circular elastic rubber products that are rolled on the ground and rolled on various vehicles or machinery. Usually installed on the metal rim, it can support the vehicle body, buffer external impact, realize contact with the road surface and ensure the driving performance of the vehicle. Tires are often used under complex and harsh conditions, and they are subjected to various deformations, loads, forces, and high and low temperature effects during driving, so they must have high load-bearing, traction, and cushioning properties. At the same time, high wear resistance and flex resistance, as well as low rolling resistance and heat generation are also required. [0003] The impact of tires on grip is very important for cars, especially in rainy and snowy weather. Increasin...

Claims

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Application Information

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IPC IPC(8): G01M17/02
CPCG01M17/02
Inventor 梁荣亮王铁李景升苑林张志国刘学松王文军李良雨王景先
Owner CATARC AUTOMOTIVE TEST CENT TIANJIN CO LTD