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GB/T 14172-2021 PDF English

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GB/T 14172-2021: Bench test methods of static roll stability for motor vehicles, trailers and combination vehicles
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GB/T 14172: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] deliveryName of Chinese StandardStatus
GB/T 14172-2021English200 Add to Cart 0-9 seconds. Auto-delivery Bench test methods of static roll stability for motor vehicles, trailers and combination vehicles Valid
GB/T 14172-2009English70 Add to Cart 0-9 seconds. Auto-delivery Static roll stability test method for motor vehicles Obsolete
GB/T 14172-1993English199 Add to Cart 2 days Static roll stability test method for motor vehicles Obsolete

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GB/T 14172-2021: Bench test methods of static roll stability for motor vehicles, trailers and combination vehicles


---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT14172-2021
GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 43.020 CCS T 04 Replacing GB/T 14172-2009 Bench test methods of static roll stability for motor vehicles, trailers and combination vehicles Issued on. AUGUST 20, 2021 Implemented on. MARCH 01, 2022 Issued by. State Administration for Market Regulation; Standardization Administration of the People's Republic of China.

Table of Contents

Foreword... 3 1 Scope... 5 2 Normative references... 5 3 Terms and definitions... 5 4 Test equipment... 6 5 Test conditions... 7 6 Test methods... 8 7 Test records... 10 Annex A (informative) Test records... 11 Bibliography... 13

Foreword

This Standard was drafted in accordance with the rules given in GB/T 1.1-2020 “Directives for standardization - Part 1.Rules for the structure and drafting of standardizing documents". This Standard replaces GB/T 14172-2009 "Static roll stability test method for motor vehicles". Compared with GB/T 14172-2009, in addition to editorial modifications, the main technical changes in this Standard are as follows. - changed the application scope (see Chapter 1 of this Edition, Chapter 1 of Edition 2009); - changed the terms and definitions for static roll stability, roll angle, maximum stable roll angle (see 3.1, 3.2, 3.3 of this Edition, 3.1, 3.2, 3.3 of Edition 2009); - added the term and definition for stable roll angle (see 3.4 of this Edition); - added the maximum allowable error requirement of the tire pressure measuring instrument (see 4.1 of this Edition); - changed the test bench ascending speed and descending speed requirements (see 4.2.2 of this Edition, 4.2.2 of Edition 2009); - changed the test bench surface requirements (see 4.2.3, 4.2.4 of this Edition, 4.2.3, 4.2.4 of Edition 2009); - changed the anti-skid stop requirements (see 4.3 of this Edition, 4.3 of Edition 2009); - changed the vehicle load state requirements (see 5.1.2 of this Edition, 5.1.5 of Edition 2009); - changed the suspension locking requirements (see 5.1.3 of this Edition, 5.1.4 of Edition 2009); - changed the environmental condition requirements (see 5.2 of this Edition, 5.2 of Edition 2009); - added the special requirements for trailers (see 5.3 of this Edition); - added the requirements for transmission and differential lock during test (see 6.1.1.2 of this Edition); - added the operational requirements for repeated tests (see 6.1.1.5 of this Edition); - changed the data processing requirements (see 6.1.3 of this Edition, Chapter 7 of Edition 2009); - added the test method of stable roll angle at specified angle (see 6.2 of this Edition); - changed the test records (see Chapter 7, Annex A of this Edition, Chapter 8, Annex A of Edition 2009). Attention is drawn to the possibility that some of the elements of this Standard may be the subject of patent rights. The issuing authority shall not be held responsible for identifying any or all such patent rights. This Standard was proposed by Ministry of Industry and Information Technology of the People's Republic of China. This Standard shall be under the jurisdiction of National Technical Committee on Automobiles of Standardization Administration of China (SAC/TC 114). The drafting organizations of this Standard. Xiangyang Daan Automobile Inspection Center Co., Ltd., China Automotive Technology Research Center Co., Ltd., Xiamen Golden Dragon Wagon Co., Ltd., Guangxi Zhuang Autonomous Region Automobile Tractor Research Institute Co., Ltd., Jinan Yuantong Measurement and Control Technology Co., Ltd., China Automobile Research Institute Automobile Inspection Center (Tianjin) Co., Ltd., China Automobile Research Institute Automobile Inspection Center (Wuhan) Co., Ltd., Zhengzhou Yutong Bus Co., Ltd., Henan University of Technology, Nanjing Iveco Automobile Co., Ltd. Main drafters of this Standard. Wang Zuguo, Zhang Xiaohui, Tian Fugang, Chen Yan, Chen Gan, Zhu Xin, Gao Aidong, Sun Zhipeng, Meng Sheng, Xu Zhongtang, Bao Junjiang, Gao Zhenhua, Si Junde, Yang Yunsheng, Zhu Xiao, Xie Dongming, Zhang Guangxiu, He Ziyi, Fu Songqing, Qiu Ranran, Zhao Jun, Lu Yi, Wang Xumin. This Standard was issued in 1993 for the first time, revised in 2009 for the first time. This is the second revision. Bench test methods of static roll stability for motor vehicles, trailers and combination vehicles

1 Scope

This Standard specifies test equipment, test conditions, test methods and test records for bench test of static roll stability for motor vehicles, trailers and combination vehicles. This Standard is applicable to motor vehicles, trailers and combination vehicles. Other types of vehicles may refer to this Standard for implementation.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 1184-1996, Geometrical tolerancing - Geometrical tolerance for features without individual tolerance indications GB/T 3730.1, Motor vehicles and trailers – Types - Terms and definitions

3 Terms and definitions

For the purposes of this document, the terms and definitions defined in GB/T 3730.1 as well as the followings apply. 3.1 static roll stability the vehicle's inherent anti-rolling ability when subjected to lateral forces under static conditions 3.2 roll angle when the vehicle tilts with the tilt test bench, the angle between the vehicle tire support plane and the horizontal plane 3.3 maximum stable roll angle the roll angle when the normal reaction force of all tire support planes on the lifting side of the vehicle reaches zero

4 Test equipment

4.1 Measuring instruments The requirements for measuring instruments are shown in Table 1. 4.2 Roll test bench 4.2.1 The maximum roll angle of the test bench surface shall be able to meet the static roll stability requirements of the vehicle under test. The roll angle of the test bench shall be able to be adjusted continuously between zero degrees and the maximum roll angle, and can be fixed at any angle. 4.2.4 The flatness of the test bench is not lower than the tolerance level 12 specified in Table B.1 of GB/T 1184-1996.The parallelism between the longitudinal axis of the test bench and the centerline of rotation shall not be lower than the tolerance level 12 specified in Table B.3 of GB/T 1184-1996. 4.3 Anti-skidding block In order to prevent the vehicle from skidding during the test, an anti-skidding block can be installed on the roll test bench. The height of the anti-skidding block is set to minimize the impact on the test results. 4.4 Anti-rollover safety equipment Special safety equipment to prevent the vehicle from overturning accidents shall be equipped during the test.

5 Test conditions

5.1 Vehicle conditions 5.1.1 Tires In the test load state, the cold inflation pressure of the test vehicle's tires shall meet the vehicle manufacturer's regulations. 5.1.3 Vehicle preparation All vehicle assemblies, components and auxiliary equipment (including tools and spare tires) shall be fully equipped according to the manufacturer's regulations and installed in the prescribed positions. As for the assembly or component whose position can be adjusted (such as lifting shaft, adjustable air suspension), it shall be adjusted to a state suitable for the load. 5.2 Environmental conditions In the outdoor test, the ambient wind speed shall not exceed 5m/s, and the lateral wind speed shall not exceed 3m/s. 5.3 Special requirements for trailers 5.3.1 Semi-trailers Semi-trailer measurement shall be carried out in the form of a combination of tractor or tractor simulation device. The tractor simulation device shall have structural characteristics similar to the actual tractor. The structure and height of the tractor seat of the tractor (or tractor simulation device) shall match that of the semi-trailer. 5.3.2 Tow bar trailer and central axle trailer A tractor, tractor simulation device or other supporting device shall be used to assist in the test. The structure and height of the connecting device used on the tractor, tractor simulator or other supporting device shall match the tested trailer.

6 Test methods

6.1 Determination of maximum stable roll angle 6.1.1 Measure the maximum stable roll angle when the vehicle leans to the left 6.1.1.1 Place the vehicle on the roll test bench. The tires are driving in a straight line. The longitudinal symmetry plane of the vehicle is parallel to the centerline of rotation of the test bench. 6.1.1.2 Implement the parking brake. The transmission is in neutral position (when applicable). The differential lock is in an inactive state. Install anti- skidding block and anti-rollover safety equipment. 6.1.1.5 Drive the vehicle away from the roll test bench and park again according to the requirements of 6.1.1.1. 6.1.1.6 Repeat the provisions of 6.1.1.1~6.1.1.5.The test is carried out three times in total. 6.1.1.7 If the maximum difference between the three measurements exceeds 0.6°, the number of tests shall be increased until the maximum difference between the three consecutive measurements does not exceed 0.6°. It shall be based on the last three measurements. 6.1.2 Measure the maximum stable roll angle when the vehicle leans to the right Repeat the test steps in 6.1.1.Measure the maximum stable roll angle when the vehicle leans to the right. 6.2 Test for the specified stable roll angle θ 6.2.1 Judgment test of the stable roll angle when the vehicle leans to the left 6.2.1.1 Test according to 6.1.1.The vehicle will stop when it leans to the left with the test bench to the value of θ (if it reaches the critical state of rollover before the value of θ, it shall stop). The test is repeated three times. 6.2.2 Judgment test of the stable roll angle when the vehicle leans to the right Repeat the test steps in 6.2.1.Determine the stable roll angle when the vehicle leans to the right. 6.2.3 Result judgment According to the test results of 6.2.1~6.2.2, if a certain angle θ is the stable roll angle when the vehicle rolls to the left (or right), it can be determined that the maximum stable roll angle when the vehicle rolls to the left (or right) is not less than θ.

7 Test records

7.1 See Annex A for the filling of test records. 7.2 The test record shall contain the results of the maximum stable roll angle determination test and/or the stable roll angle determination test.

Annex A

(informative) Test records A.1 Test conditions Fill in the following information for the test conditions. A.2 Test records The test equipment record table is shown in Table A.1.The test data record table is shown in Table A.2. ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.


      

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