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汽车滑行试验方法
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GBT 12536-2017
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标准编号: GB/T 12536-2017 (GB/T12536-2017)
中文名称: 汽车滑行试验方法
英文名称: Coast down test method of motor vehicles
行业: 国家标准 (推荐)
中标分类: T41
国际标准分类: 43.020
字数估计: 10,199
发布日期: 2017-10-14
实施日期: 2018-05-01
起草单位: 中国汽车技术研究中心、广州汽车集团股份有限公司汽车工程研究院、上海机动车检测中心、安徽江淮汽车股份有限公司、中国汽车工程研究院股份有限公司、中国重汽集团济南动力有限公司、海南热带汽车试验有限公司、襄阳达安汽车检测中心、上海汽车集团股份有限公司、泛亚汽车技术中心有限公司、上汽通用五菱汽车股份有限公司、东风汽车有限公司东风日产乘用车公司、一汽丰田技术开发有限公司、广汽丰田汽车有限公司、北汽福田汽车股份有限公司、郑州宇通客车股份有限公司、华晨汽车集团控股有限公司、神龙汽车有限公司、一汽-大众汽车有限公司、戴姆勒
归口单位: 全国汽车标准化技术委员会(SAC/TC 114)
提出机构: 中华人民共和国工业和信息化部
发布机构: 中华人民共和国国家质量监督检验检疫总局、中国国家标准化管理委员会
GB/T 12536-2017: 汽车滑行试验方法
GB/T 12536-2017 英文名称: Coast down test method of motor vehicles
1 范围
本标准规定了各类汽车进行道路滑行试验的试验条件及试验方法。
本标准适用于各类汽车。
2 规范性引用文件
下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件,仅注日期的版本适用于本文
件。凡是不注日期的引用文件,其最新版本(包括所有的修改单)适用于本文件。
GB/T 12428 客车装载质量计算方法
GB/T 12534 汽车道路试验方法通则
GB/T 15089 机动车辆及挂车分类
3 术语和定义
下列术语和定义适用于本文件。
3.1
滑行 coastdown
汽车直线行驶时,使传动装置脱离动力机构,靠惯性前进。
4 试验条件
4.1 道路要求
4.1.1 总体要求
试验路面应为坚硬、平直、干净、干燥且足够长的沥青路面或混凝土路面。
4.1.2 纵向坡度
试验路面的纵向坡度应不超过0.1%。
4.1.3 横向坡度
试验路面的横向坡度应不超过3%。
4.2 环境要求
4.2.1 风速
试验时风速应不大于3.0m/s。对于最大设计总质量大于3500kg的汽车,风速应在高出路面
1.6m 处测量;对于其他汽车,风速应在高出路面0.7m处测量。
4.2.2 湿度
试验时相对湿度应小于95%。
4.2.3 温度
试验时大气温度应在0℃~40℃之间。
4.3 测量参数及其单位、精确度
测量参数及其单位、精确度要求见表1。
4.4 车辆条件
4.4.1 车辆磨合
试验车辆应按制造厂要求进行磨合;如无要求,则应进行至少3000km的磨合,且磨合后处于正常
的运行状态。试验轮胎花纹深度应为原始花纹深度的50%以上。
4.4.2 车辆试验质量及载荷分布
4.4.2.1 M1 类汽车和最大设计总质量小于2t的N1 类汽车
4.4.2.1.1 当车辆的50%最大允许装载质量小于或等于180kg时,试验质量为整车整备质量加上
180kg;当车辆的50%最大允许装载质量大于180kg时,车辆的试验质量为整车整备质量加上50%的
最大允许装载质量。
4.4.2.1.2 载荷分布尽量均匀。
4.4.2.2 M2、M3 类汽车和最大设计总质量不小于2t的N类汽车
4.4.2.2.1 除了特殊规定外,适用于 M2、M3 类城市客车为装载质量的65%;其他汽车为满载。
4.4.2.2.2 M2、M3 类汽车的载荷按照GB/T 12428均布;N类汽车的载荷按照GB/T 12534均布。
4.4.3 车辆准备
4.4.3.1 如无特殊要求,车辆应干净,车窗和乘客舱内通风装置应关闭。
4.4.3.2 如照明装置打开可能影响试验结果,则应关闭。
4.4.3.3 轮胎冷充气压力应符合该车技术条件的规定。
4.4.3.4 试验开始前,应采用适当的方式使车辆达到正常运行温度。
4.4.3.5 对于带有能量回收装置的试验车辆,应确保变速器挡位置于N挡时能量回收装置不产生驱动
或者阻止车辆滑行的力。
5 试验方法
5.1 在足够长的试验路面两端设立标志物作为滑行区段。
5.2 试验车辆在进入滑行区段前应停止加速,保持稳定的行驶状态。
5.3 试验车辆即将驶入滑行区段前,对于配置手动变速器的车辆,将手动变速器挡位置于空挡并松开
离合器踏板;对于配置自动变速器的车辆,将挡位置于N挡,试验车辆开始滑行。
5.4 试验车辆进入滑行区域时车速应稍大于50km/h。
5.5 滑行过程中,试验车辆应沿直线行驶。
5.6 记录试验车辆从(50±0.3)km/h滑行到完全停止的滑行距离S'及滑行初速度v'0。
5.7 用附录A的数据校正方法得出试验车辆从50km/h滑行到完全停止的滑行距离S。
5.8 试验至少往返各进行三次,往返的路径应尽量重合,同方向上的S 差异不应超过5%。得出双方
向的滑行距离算术平均值S1(往)和S2(返)。
5.9 试验车辆的滑行距离最终试验结果为S1(往)和S2(返)的算术平均值。
6 试验结果
试验数据和结果按附录B的试验记录表填写。
附 录 A
(规范性附录)
数据校正方法
用实测初速度v'0和实测滑行距离S',按式(A.1)和式(A.2)算出标准初速度v0=50km/h的滑行
距离S。
附 录 B
(规范性附录)
汽车滑行试验记录表。
GB/T 12536-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.020
T 41
Replacing GB/T 12536-1990
Coast down test method of motor vehicles
ISSUED ON. OCTOBER 14, 2017
IMPLEMENTED ON. MAY 1, 2018
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword . 3
1 Scope .. 5
2 Normative references . 5
3 Terms and definitions . 5
4 Test conditions . 5
5 Test methods .. 7
6 Test results .. 8
Annex A (Normative) Data correction method . 9
Annex B (Normative) Vehicle coast down test record table . 10
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 12536-1990 " Motor vehicles - Coast down - Test
method". Compared with GB/T 12536-1990, the main technical changes in this
Standard are as follows.
- added the terms and definitions;
- added the "road requirements", "environmental requirements",
"measurement parameters and their units, accuracy", "vehicle conditions"
in the test conditions;
- refined the test methods and added the test requirements for automatic
motor vehicles;
- modified "Data correction method" in Clause 5 of GB/T 12536-1990 as
Annex B in this Standard;
- added part of the test record content in Annex A.
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. China Automotive Technology and
Research Center, Guangzhou Automobile Group Co., Ltd. Automotive
Engineering Research Institute, Shanghai Motor Vehicle Testing Center, Anhui
Jianghuai Automobile Co., Ltd., China Automotive Engineering Research
Institute Co., Ltd., China National Heavy Duty Truck Group Jinan Power Co.,
Ltd., Hainan Tropical Auto Testing Co., Ltd., Xiangyang Da'an Automobile
Testing Center, Shanghai Automotive Group Co., Ltd., Pan Asia Automotive
Technology Center Co., Ltd., SAIC-GM-Wuling Automobile Co., Ltd., Dongfeng
Motor Co., Ltd. Dongfeng Nissan Passenger Vehicle Co., Ltd., FAW Toyota
Technology Development Co., Ltd., Guangzhou Automobile Toyota Motor Co.,
Ltd., Beiqi Foton Motor Co., Ltd., Zhengzhou Yutong Bus Co., Ltd., Brilliance
Automotive Group Holdings Limited, Dongfeng Peugeot Citroen Automobile
Co., Ltd., FAW-VW Automotive Co., Ltd., Daimler Greater China Investment Co.,
Ltd., BMW (China) Service Co., Ltd., Toyota Motor R&D Center (China) Co.,
Ltd. Beijing Branch.
Main drafters of this Standard. Gao Yue, Wang Xueping, Liu Guibin, Liang
Rongliang, Zhang Jin, Su Qingrui, Li Yugang, Wei Xiaohua, Shi Jianhua, Wang
Coast down test method of motor vehicles
1 Scope
This Standard specifies the test conditions and test methods of coast down
tests for various types of motor vehicles.
This Standard is applicable to various types of motor vehicles.
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 12428, Laden mass calculating method for buses
GB/T 12534, Motor vehicles - General rules of road test method
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 coast down
when the vehicle runs in a straight line, the transmission is disengaged from the
power mechanism, and it advances on inertia
4 Test conditions
4.1 Road requirements
4.1.1 General requirements
The test pavement shall be hard, straight, clean, dry and long enough asphalt
4.1.2 Longitudinal slope
4.4.2.1 M1 vehicles and N1 vehicles with a maximum total design mass
of less than 2t
4.4.2.1.1 When the vehicle's 50% maximum allowable load mass is less than
or equal to 180 kg, the test mass is the entire vehicle trim mass plus 180 kg.
When the vehicle's 50% maximum allowable loading mass is greater than 180
kg, the vehicle's test mass is the vehicle's total mass plus 50% of the maximum
allowable loading mass.
4.4.2.1.2 The load shall be distributed as uniform as possible.
not less than 2t
4.4.2.2.1 Except for special regulations, it applies to 65% of the load mass of
M2 and M3 urban passenger vehicles; other vehicles are fully loaded.
4.4.2.2.2 The load of M2 and M3 vehicles is uniformly distributed according to
GB/T 12428. The load of N vehicles is uniformly distributed according to GB/T
12543.
4.4.3 Vehicle preparation
4.4.3.1 If there are no special requirements, the vehicle shall be clean and the
windows and ventilation device in the passenger compartment shall be closed
4.4.3.2 if the lighting device may affect the test results when it is turned on, it
shall be turned off.
4.4.3.3 Tire cold inflation pressure shall meet the requirements of the
technical conditions of the vehicle.
4.4.3.4 Prior to the start of the test, the vehicle shall be brought into normal
operating temperature in a suitable manner.
4.4.3.5 For test vehicles with energy recovery devices, ensure that the energy
recovery device does not produce or stop the vehicle from sliding when the
transmission gear is in the N gear.
5.1 Markers are set up on both sides of a sufficiently long test pavement as a
coast down section.
5.2 The test vehicle shall stop accelerating before entering the coast down
section. Maintain stable driving conditions.
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