GB/T 38146.1-2019 PDF English
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China automotive test cycle - Part 1: Light-duty vehicles
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GB/T 38146.1-2019: China automotive test cycle - Part 1: Light-duty 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/GBT38146.1-2019
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.020
T 40
China automotive test cycle -
Part 1.Light-duty vehicles
Issued on. OCTOBER 17, 2019
Implemented on. MAY 01, 2020
Issued by. State Administration for Market Regulation;
Standardization Administration of the PRC.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 4
4 Cycle construction... 7
Appendix A (Normative) Data of China light-duty vehicle test cycle... 10
Appendix B (Normative) General method for development of China automotive
test cycle... 34
Foreword
GB/T 38146 "China automotive test cycle" is divided into 3 parts.
- Part 1.Light-duty vehicles;
- Part 2.Heavy commercial vehicles;
- Part 3.Engines.
This Part is Part 1 of GB/T 38146.
This Part is drafted in accordance with the rules given in GB/T 1.1-2009.
This Part was proposed by Ministry of Industry and Information Technology of
the PRC.
This Part shall be under the jurisdiction of National Technical Committee of Auto
Standardization (SAC/TC 114).
Drafting organization of this Part. China Automotive Technology and Research
Center Co., Ltd.
Main drafters of this Part. Wu Zhixin, Li Mengliang, Zhou Hua, Wang Zhao, Liu
Yu, Xu Yueyun, Hu Xi, Zheng Tianlei, Bao Xiang, He Kexun, Wang Yang, Zhou
Boya, Shen Shu, An Xiaopan, Fang Maodong, Qin Kongjian, Li Jingyuan, Yu
Hanzhengnan, Guo Qianli, Yao Zhanhui, Lv Renzhi.
China automotive test cycle -
Part 1.Light-duty vehicles
1 Scope
This Part of GB/T 38146 specifies the construction of the test cycle of light-duty
vehicles (including passenger cars and light-duty commercial vehicles).
This Part applies to M1 and N1 type vehicles, M2 type vehicles with a maximum
design total mass not exceeding 3500 kg.
2 Normative references
The following documents are indispensable for the application of this document.
For the dated references, only the editions with the dates indicated are
applicable to this document. For the undated references, the latest edition
(including all the amendments) are applicable to this document.
GB/T 3730.1 Motor vehicles and trailers - Types - Terms and definitions
GB/T 15089 Classification of power-driven vehicles and trailers
3 Terms and definitions
The terms and definitions defined in GB/T 3730.1 and GB/T 15089 and the
following ones apply to this document.
3.1 Light-duty vehicle
M1 and N1 type vehicles, M2 type vehicles with a maximum design total mass
not exceeding 3500 kg.
3.2 China automotive test cycle
The time-speed curve which describes the driving characteristics of a particular
vehicle (such as a passenger car, a commercial vehicle, a city bus, etc.) in a
Chinese traffic environment.
3.3 China light-duty vehicle test cycle; CLTC
The general term for China automotive test cycle used by M1 and N1 type
vehicles, M2 type vehicles with a maximum design total mass not exceeding
3500 kg.
4 Cycle construction
4.1 Overview
China light-duty vehicle test cycle includes China light-duty vehicle test cycle
for passenger car and China light-duty vehicle test cycle for commercial vehicle.
4.2 China light-duty vehicle test cycle for passenger car
China light-duty vehicle test cycle for passenger car (CLTC-P) includes 3 speed
intervals.
4.3 China light-duty vehicle test cycle for commercial vehicle
China light-duty vehicle test cycle for commercial vehicle (CLTC-C) includes 3
speed intervals.
Appendix A
(Normative)
Data of China light-duty vehicle test cycle
A.1 The CLTC-P cycle data is shown in Table A.1.
Appendix B
(Normative)
General method for development of China automotive test cycle
B.1 General rule for development method of cycle
This method is a summary of the technical route development of China
automotive test cycle, including links such as test planning, data acquisition and
processing, weighting factor development, cycle synthesis, cycle verification,
mainly serving the development of automotive test cycle.
B.2 Test planning
B.3 Data acquisition and processing
B.3.1 USE the free driving method to continuously collect the vehicle running
data in the corresponding city (The acquisition frequency is not less than 1 Hz).
The acquisition time is not less than 3 months.
B.3.2 The acquisition parameters include vehicle position information, power
drive system information, battery information, emission and environmental
information. Through the vehicle terminal, the collected vehicle-related
parameter information is arranged according to the unified data protocol, and
through the communication network, sent to the remote data platform in real
time and synchronously.
B.4 Weighting factor development
B.4.1 GET the low-frequency dynamic traffic volume big data of the
corresponding city (the average speed of the road every five minutes).
B.4.2 Establish a speed-flow model. USE the obtained low-frequency dynamic
traffic big data to calculate the total travel time of the corresponding driving fleet
on each city road network. Establish the changing trend of the total travel time
with the average speed. The speed-flow relationship is.
B.6 Cycle verification
B.6.1 The statistical analysis of the characteristic difference between the
constructed cycle curve and the actually-collected data is carried out, to
determine the rationality of the cycle construction.
B.6.2 Based on the vehicle hub bench, the followability of the constructed cycle
is verified, to determine the operability of the cycle curve.
B.6.3 Based on the existing test procedures, through the bench verification, the
influence of the cycle curve on the service indicators is analyzed, to determine
the final cycle curve.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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