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QC/T 471-2025: Automotive diesel engine
Status: Valid QC/T 471: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| QC/T 471-2025 | English | 359 |
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4 days [Need to translate]
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Automotive diesel engine
| Valid |
QC/T 471-2025
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| QC/T 471-2006 | English | 239 |
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3 days [Need to translate]
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Specification foro auto diesel engines
| Valid |
QC/T 471-2006
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| QC/T 471-1999 | English | 199 |
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2 days [Need to translate]
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(Heavy-Duty Truck Diesel technical conditions)
| Obsolete |
QC/T 471-1999
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Basic data | Standard ID | QC/T 471-2025 (QC/T471-2025) | | Description (Translated English) | Automotive diesel engine | | Sector / Industry | Automobile & Vehicle Industry Standard (Recommended) | | Classification of Chinese Standard | T11 | | Classification of International Standard | 43.060.01 | | Word Count Estimation | 18,162 | | Date of Issue | 2025-05-09 | | Date of Implementation | 2025-11-01 | | Older Standard (superseded by this standard) | QC/T 471-2006 | | Issuing agency(ies) | Ministry of Industry and Information Technology of the People's Republic of China | QC/T 471-2025: Automotive diesel engine---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/QCT471-2025
ICS 43.060.01CCS T 11
Automobile Industry Standards of the People's Republic of China
Released on May 9, 2025
2025-11-01Implementation
Ministry of Industry and Information Technology of the People's Republic of China issued
Automobile diesel engine
Replaces QC/T 471-2006
Table of Contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Technical Requirements 2
5 Test Method 3
6 Inspection Rules 4
7 Marking, packaging, transportation and storage 5
Appendix A (Normative) Main parameters of diesel engines 7
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document replaces QC/T 471-2006 “Technical Specifications for Automotive Diesel Engines”. Compared with QC/T 471-2006, except for the structural adjustment and editing,
In addition to the functional changes, the main technical changes are as follows.
--Added general technical requirements for fuel, engine oil, electrical equipment, paint coating, etc. (see 4.1);
--Changed the appearance assembly and cleanliness requirements (see 4.1, 4.3.12 of the.2006 edition);
--Changed the provisions on starting performance requirements (see 4.2.1, 4.3.1 of the.2006 edition);
--Changed the requirements for engine oil fuel consumption ratio (see 4.2.6, 4.3.7 of the.2006 edition);
--Modified the requirements for piston leakage (see 4.2.7, 4.3.8 of the.2006 edition);
--Added requirements for oil dilution ratio (see 4.2.8);
--Added the requirements for optimal thermal efficiency (see 4.2.9);
--Added requirements for exhaust after-treatment systems (see 4.2.10);
--Added requirements for production consistency inspection (see 4.3);
--Changed the description of reliability requirements (see 4.4, 4.3.13 of the.2006 edition);
--Added durability requirements for emission control systems (see 4.4.2);
--The description of emission requirements has been changed (see 4.5.1, 4.3.10 and 4.3.11 of the.2006 edition);
--Deleted the vehicle noise requirements after diesel engine installation (see 4.3.9 of the.2006 edition);
--Added requirements for diesel engine noise (see 4.5.2);
--Added requirements for on-board diagnostic systems (OBD) (see 4.5.3);
--Added radio disturbance characteristic requirements (see 4.5.4);
--Added safety requirements (see 4.6);
--Changed the description of loading application (see 4.7, 4.4 of the.2006 edition);
--Added provisions for appearance assembly inspection (see 5.1.2);
--Changed the requirements for piston leakage test (see 5.2.7, 5.9 of the.2006 edition);
--Added requirements for oil dilution rate test (see 5.2.8);
--Added the requirements for the best thermal efficiency test (see 5.2.9);
--Added requirements for test methods for after-treatment systems (see 5.2.10);
--Added the requirements for consistency testing (see 5.3);
--Added durability requirements for diesel engines and exhaust after-treatment systems (see 5.4.2);
--Changed the requirements for exhaust pollutant test methods (see 5.5.1, 5.12 of the.2006 edition);
--Changed the noise test method (see 5.5.2, 5.10 of the.2006 edition);
--Added requirements for diagnostic system (OBD) test methods (see 5.5.3);
--Added requirements for measurement methods of radio disturbance characteristics (see 5.5.4);
--Added safety inspection requirements (see 5.6);
--The description of type test conditions has been changed (see 6.1.1, 6.3.1 of the.2006 edition);
--Added requirements for type test methods and qualification determination (see 6.1.2);
--Changed the requirements for factory inspection contents (see 6.2.2, 6.1 of the.2006 edition);
--Changed the nameplate requirements (see 7.1.1, 7.2.1 of the.2006 edition);
--Changed the description of permanent number (see 7.1.3, 7.2.4 of the.2006 edition);
--Changed the specific requirements of the instruction manual (see 7.1.4, 7.6 of the.2006 edition);
--The description that all liquids should be drained before packaging has been changed (see 7.2.1, 7.3.1 of the.2006 edition);
-- Changed the requirements for vehicle accessories and accompanying tools (see 7.2.3, 7.3.4 of the.2006 edition);
--The description of the marking on the packaging box has been changed (see 7.2.5, 7.3.5 of the.2006 edition);
--Changed the requirements for storage and corrosion prevention (see 7.4, 7.5 of the.2006 edition);
--The technical parameters of diesel engines have been changed (see Appendix A, 4.2 of the.2006 edition).
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed and coordinated by the National Technical Committee for Standardization of Automotive Products (SAC/TC 114).
This document was drafted by. Dongfeng Commercial Vehicle Co., Ltd., Dongfeng Motor Group Co., Ltd., Guangxi Yuchai Machinery Co., Ltd., Chongqing
Cummins Engine Company, Weichai Power Co., Ltd.
The main drafters of this document are. Xiang Yaoming, Yang Liling, Wang Zhenhong, Dong Jiazhi, Huang Yongxin, Guo Zhiyi, Wu Hongliang, Li Zhijie, and Wang Huajie.
The previous versions of this document and the documents it replaces are as follows.
--First issued in.1999 as QC/T 471-1999;
--First revised in.2006;
--This is the second revision.
Automobile diesel engine
1 Scope
This document specifies the terms and definitions, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of automotive diesel engines.
This document applies to automotive diesel engines (hereinafter referred to as "diesel engines").
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to this document.
document.
GB/T 1859.1 Reciprocating internal combustion engines - Determination of sound power level by sound pressure method - Part 1.Engineering method
GB/T 1883.1 Reciprocating internal combustion engines - Vocabulary - Part 1.Engine design and operation terms
GB/T 3821 Cleanliness limits and determination methods for small and medium power internal combustion engines
GB 3847 Diesel Vehicle Pollutant Emission Limits and Measurement Methods (Free Acceleration Method and Loaded Deceleration Method)
GB/T 6809 (all parts) Terminology of reciprocating internal combustion engine components and systems
GB 7258 Technical conditions for motor vehicle operation safety
GB/T 9969 General principles for instructions for use of industrial products
GB 14023 Radio disturbance characteristics of vehicles, ships and internal combustion engines - Limits and methods of measurement for protection of off-board receivers
GB/T 14097 Noise Limits for Reciprocating Internal Combustion Engines
GB 17691 Heavy-duty diesel vehicle pollutant emission limits and measurement methods (China Stage VI)
GB/T 17692 Test method for net power of automotive engines and drive motors
GB/T 18297 Automobile engine performance test methods
GB 18352.6-2016 Light-duty vehicle pollutant emission limits and measurement methods (China Stage VI)
GB/T 19055 Automobile engine reliability test method
GB 19147 Diesel fuel for vehicles
GB/T 20651.1 Safety of reciprocating internal combustion engines Part 1.Compression ignition engines
QC/T 413 Basic Technical Requirements for Automotive Electrical Equipment
QC/T 484 Automobile Paint Coating
QC/T 526 Automobile Engine Type Test Procedure
QC/T 829 Technical Specifications for Diesel Vehicle Exhaust Aftertreatment Systems
QC/T 901 Automobile Engine Product Quality Inspection and Assessment Methods
3 Terms and Definitions
The terms and definitions defined in GB/T 1883.1, GB/T 6809 (all parts), GB/T 18297 and GB/T 19055 apply to this standard.
document.
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