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| GB/T 1147.1-2025 | English | 439 |
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Small and medium power internal combustion engines - Part 1: General technical specifications
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GB/T 1147.1-2025
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| GB/T 1147.1-2017 | English | 339 |
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Small and medium power internal combustion engines -- Part 1: General requirements [including 2018XG1]
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GB/T 1147.1-2017
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| GB/T 1147.1-2007 | English | 180 |
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Small and medium power internal combustion engines -- Part 1: General requirements
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GB/T 1147.1-2007
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| GB/T 1147-1987 | English | 199 |
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Reciprocating internal combustion engines--General technical specifications
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GB/T 1147-1987
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Basic data | Standard ID | GB/T 1147.1-2025 (GB/T1147.1-2025) | | Description (Translated English) | Small and medium power internal combustion engines - Part 1: General technical specifications | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J91 | | Classification of International Standard | 27.020 | | Word Count Estimation | 22,271 | | Date of Issue | 2025-10-31 | | Date of Implementation | 2026-05-01 | | Older Standard (superseded by this standard) | GB/T 1147.1-2017 | | Issuing agency(ies) | State Administration for Market Regulation and Standardization Administration of China | GB/T 1147.1-2025: Small and medium power internal combustion engines - Part 1: General technical specifications
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 27.020
CCSJ91
National Standards of the People's Republic of China
Replaces GB/T 1147.1-2017
Part 1.Small and Medium Power Internal Combustion Engines
General Technical Specifications
Published on 2025-10-31
Implemented on May 1, 2026
State Administration for Market Regulation
The State Administration for Standardization issued a statement.
Table of contents
Preface III
Introduction IV
1.Scope 1
2 Normative References 1
3.Terms and Definitions 2
4.Technical Requirements 3
5.Test Methods 12
6.Inspection Rule 12
7.Marking, Packaging, Transport and Storage 14
Appendix A (Normative) Names of Major Components of Diesel Engines 16
Appendix B (Normative) Names of Major Components of Gasoline Engines 17
Table 1.Tolerance between Actual Power and Nameplate Power of 37kW and Below Non-Road Diesel Engines (Rated Operating Conditions) 4
Table 2 Fuel Consumption Rate Requirements at Maximum Torque Point and Partial Load/Partial Speed Operating Conditions 5
Table 3.Uniformity Requirements for Each Cylinder 6
Table 4 Torque Reserve Ratio Requirement 6
Table 5.Required ratio of maximum torque point speed to rated speed. (6)
Table 6 Speed Regulation Characteristics Requirements 7
Table 7 Minimum Continuous Full-Load Speed and its Continuous Operating Time Requirements
Table 8 Ambient Temperature and Start-up Time Requirements
Table 9.Tilt and Trim Requirements 8
Table 10 Emission Limits for Internal Combustion Engines Used Underground 9
Table 11 Requirements after durability testing of high-speed and low-speed internal combustion engines (10)
Table 12 Requirements after durability testing of medium-speed internal combustion engines 11
Table 13 Service Life 11
Table 14 Inspection Item 13
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents".
Drafting.
This document is Part 1 of GB/T 1147 "Internal Combustion Engines of Medium and Small Power". GB/T 1147 has already published the following parts.
---Part 1.General Technical Specifications;
---Part 2.Experimental Methods.
This document replaces GB/T 1147.1-2017 "Small and Medium Power Internal Combustion Engines - Part 1.General Technical Conditions", and is consistent with GB/T 1147.1-
Compared to.2017, aside from structural adjustments and editorial changes, the main technical changes are as follows.
a) Added terms and definitions (see Chapter 3);
b) The calibration requirements for fuel and oil consumption rates have been changed (see 4.4, 3.4 in the.2017 edition);
c) The uniformity of operation for each cylinder has been changed (see 4.6, 3.8 in the.2017 version);
d) The torque reserve requirement has been changed (see 4.7, 3.9 in the.2017 version);
e) The speed regulation characteristic requirements have been changed (see 4.8, 3.10 in the.2017 version);
f) The mechanical vibration requirements have been changed (see 4.16, 3.21 in the.2017 edition);
g) The smoke opacity requirements have been changed (see 4.20, 3.25 in the.2017 version);
h) Emissions requirements have been changed (see 4.21, 3.26 in the.2017 edition);
i) Increased electromagnetic compatibility requirements (see 4.22);
j) The thermal shock requirements have been changed (see 4.23, 3.27 in the.2017 edition);
k) Reliability requirements have been changed (see 4.24, 3.28 in the.2017 version);
l) The durability requirements have been changed (see 4.25, 3.29 in the.2017 version);
m) Delivery requirements have been removed (see 3.31 in the.2017 edition);
n) Increased requirements for the electronic control system (see 4.27);
o) Added requirements for OBD, NCD, and PCD systems (see 4.28);
p) The marking requirements have been changed (see 7.1, 6.1 in the.2017 edition).
Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.
This document was proposed by the China Machinery Industry Federation.
This document is under the jurisdiction of the National Technical Committee on Standardization of Internal Combustion Engines (SAC/TC177).
This document was drafted by. Shanghai Motor Vehicle Inspection and Certification Technology Research Center Co., Ltd., Guangxi Yuchai Machinery Co., Ltd., and Kunming...
Yunnei Power Co., Ltd., Weichai Power Co., Ltd., China North Engine Research Institute, and Shanghai New Energy Vehicle Technology Co., Ltd.
Limited Liability Company, Harbin Dong'an Automotive Power Co., Ltd., Ningbo Fengwo Turbocharging Technology Co., Ltd., Tianjin Internal Combustion Engine Research Institute (Tianjin)
Motorcycle Technology Center), Changchai Co., Ltd., Zhejiang Xinchai Co., Ltd., Jiangsu Changfa Agricultural Equipment Co., Ltd., Wuxi
Huayuan Kaima Engine Co., Ltd., China Merchants Vehicle Testing Technology Research Institute Co., Ltd., Luoyang Tractor Research Institute Co., Ltd., Zhejiang Fu
Jade Automotive Systems Co., Ltd., Wuhan Dongfang Junchi Precision Manufacturing Co., Ltd., and Zhejiang Heda Aluminum Co., Ltd.
The main drafters of this document are. Guo Hua, Xie Yaping, Dong Jiazhi, Wang Yanfeng, Liu Changzhen, Wang Decheng, Bi Hongbao, Deng Yulin, and Li Jundong.
Zhao Xingtian, Wang Yonghong, Ding Qianlan, Chen Nan, Qin Xingnian, Xie Guozhong, Yao Jun, Liu Jianyong, Wang Yuesheng, Xie Tailin, Yue Zhuang, Zhang Wei, Li Yujie
Chen Zezhong, Li Zhijie, Wu Ruiting, Shi Laihua, Zheng Herui, Zhao Jidong, Wang Junjie, Zhu Jiangping, Wu Wei, Zhang Shun, Ji Weibin.
This document was first published in 1987, revised for the first time in.2007, revised for the second time in.2017, and this is the third revision.
Introduction
Small and medium power internal combustion engines (rated power not exceeding 560kW) are widely used in road vehicles, ships, agricultural tractors, forestry machinery, and industrial machinery.
It provides power for various supporting machinery, such as engineering machinery, generator sets, and irrigation and drainage machinery.
GB/T 1147 "Small and Medium Power Internal Combustion Engines" is a general technical standard for small and medium power internal combustion engines, aiming to provide a framework for their development.
GB/T 1147 provides a basis for development, production, inspection, trade (delivery) and technical exchange. It consists of two parts.
---Part 1.General Technical Specifications. The purpose is to establish general requirements for small-power internal combustion engines for different applications.
---Part 2.Test Methods. The aim is to establish test methods for small and medium power internal combustion engines, including general performance test methods and specific test methods.
Special performance testing methods.
Part 1.Small and Medium Power Internal Combustion Engines
General Technical Specifications
1 Scope
This document specifies the technical requirements, inspection rules, marking, packaging, and transportation of small and medium power internal combustion engines (rated power not exceeding 560kW).
The corresponding experimental methods are described, including storage and other aspects.
This document applies to small and medium power vehicles, ships, agricultural tractors and forestry machinery, construction machinery, generator sets, and irrigation and drainage machinery.
For internal combustion engines, other small and medium-power internal combustion engines for which there are currently no applicable documents shall refer to this guideline.
2 Normative references
The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.
For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.
This document.
GB/T 191 Pictorial Symbols for Packaging and Storage
GB/T 725 Rules for Compiling Product Names and Model Numbers for Internal Combustion Engines
GB/T 726 Direction of rotation, cylinder and cylinder head valve markings for reciprocating internal combustion engines; right and left engine markings for inline internal combustion engines.
Definition of engine orientation
GB/T 1147.2-2025 Small and Medium Power Internal Combustion Engines - Part 2.Test Methods
GB/T 1883 (all parts) Terminology for Reciprocating Internal Combustion Engines
GB/T 2820.2-2009 Reciprocating internal combustion engine driven alternator sets - Part 2.Engines
GB/T 3475 Technical requirements and test methods for speed control systems of marine diesel engines
GB/T 3821 Cleanliness limits and test methods for small and medium power internal combustion engines
GB/T 6072.1 Performance of reciprocating internal combustion engines – Part 1.Calibration and test methods for power, fuel consumption and oil consumption
Additional requirements for general-purpose engines
GB/T 6072.4 Performance of reciprocating internal combustion engines – Part 4.Speed regulation
GB/T 6388 Transport Packaging Receipt and Delivery Marks
GB/T 6809 (All Parts) Terminology for Components and Systems of Reciprocating Internal Combustion Engines
GB/T 7184-2023 Vibration Assessment Method for Reciprocating Internal Combustion Engines
GB 8840 Exhaust smoke limits for marine diesel engines
GB/T 9486 Steady-state exhaust smoke opacity and its determination method for diesel engines
GB/T 10398 Vibration rating and test methods for small gasoline engines
GB/T 10826 (All Parts) Vocabulary of Fuel Injection Devices
GB 11871 Limits for air noise radiated by marine diesel engines
GB/T 14097-2023 Noise Limits for Reciprocating Internal Combustion Engines
GB 14023-2022 Limits and methods of measurement for radio interference characteristics of vehicles, ships and internal combustion engines for protection of external receivers.
GB 14762-2008 Emission limits and measurement methods for exhaust pollutants from gasoline engines and automobiles for heavy-duty vehicles (China Stage III and IV)
GB 15097-2016 Emission Limits and Measurement Methods for Exhaust Pollutants from Marine Engines (China Phase I and II)
GB/T 15370 (all parts) General technical conditions for agricultural tractors
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GB/T 1147.1-2025: Small and medium power internal combustion engines - Part 1: General technical specifications
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