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GB/T 12536-2017

Chinese Standard: 'GB/T 12536-2017'
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Detail Information of GB/T 12536-2017; GB/T12536-2017
Description (Translated English): Coastdown test method of motor vehicles
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: T41
Classification of International Standard: 43.020
Word Count Estimation: 10,153
Date of Issue: 2017-10-14
Date of Implementation: 2018-05-01
Drafting Organization: China Automotive Technology 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 Automobile Test Co., Ltd., Xiangyang Daan Automobile Testing Center, Shanghai Automotive Group Co., Ltd., Pan Asia Automotive Technology Center Co., Ltd., SAIC-GM-Wuling Automobile Co., Ltd., Dongfeng Motor Co. Dongfeng Nissan Passenger Vehicle Company, FAW Toyota Technology Development Ltd., Guangzhou Automobile Toyota Motor Co., Ltd., Beiqi Foton Motor Co., Ltd., Zhengzhou Yutong Bus Co., Ltd., Brilliance Automotive Group Holding Co., Ltd., Shenlong Motor Co., Ltd., FAW-Volkswagen Ltd., Daimler
Administrative Organization: National Automotive Standardization Technical Committee (SAC/TC 114)
Proposing organization: Ministry of Industry and Information Technology of the People Republic of China
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of PRC; China National Standardization Administration

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
汽车滑行试验方法
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
GB/T 15089, Classification of power-driven vehicles and trailers
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
or concrete pavement.
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.
4.4.2.2 M2, M3 vehicles and N vehicles with maximum design total mass
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
and turned off.
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
technic......
Related standard:   GB/T 12544-2012  GB/T 36881-2018
   
 
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