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GB/T 41161-2022 English PDF

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GB/T 41161-2022: Reciprocating internal combustion engines - Measurement method for combustion noise
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PDF similar to GB/T 41161-2022


Standard similar to GB/T 41161-2022

GB/T 1859.1   GB/T 1859.2   JB/T 11880.7   GB/T 23337   GB/T 33928   

Basic data

Standard ID GB/T 41161-2022 (GB/T41161-2022)
Description (Translated English) Reciprocating internal combustion engines - Measurement method for combustion noise
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J93
Word Count Estimation 14,170
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 41161-2022: Reciprocating internal combustion engines - Measurement method for combustion noise


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Reciprocating internal combustion engines - Measurement method for combustion noise ICS 27.020 CCSJ93 National Standards of People's Republic of China Measurement method for combustion noise of reciprocating internal combustion engine combustionnoise Published on 2022-03-09 2022-10-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration directory Preface I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Measurement Environment 4 4.1 Acoustic Environment 4 4.2 Weather conditions4 5 Measuring instruments 4 5.1 General 4 5.2 Check 4 5.3 Use 4 6 Working conditions 4 6.1 General 4 6.2 Installation conditions 4 6.3 Operating conditions 5 7 measure 5 7.1 General 5 7.2 Cylinder pressure sensor arrangement 5 7.3 Determination of crankshaft angle zero position 5 7.4 Cylinder pressure test 5 8 Calculate 5 8.1 General 5 8.2 Calculation of combustion noise 6 9 Record content8 10 Report 8 Appendix A (Normative) Calculation of A-Weighted and Z-Weighted Combustion Noise Levels from Frequency Band Combustion Noise Levels9 Table A.1 Values of j and Aj at the centre frequency of the 1/3 octave band9 Table A.2 Values of j and Aj at the octave band center frequency 10

foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents" drafted. This document is proposed by China Machinery Industry Federation. This document is under the jurisdiction of the National Technical Committee for Standardization of Internal Combustion Engines (SAC/TC177). Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents. This document is drafted by. Shanghai Internal Combustion Engine Research Institute Co., Ltd., SAIC Maxus Motor Co., Ltd., SAIC Motor Corporation Limited Co., Ltd. Commercial Vehicle Technology Center, Shanghai Motor Vehicle Testing and Certification Technology Research Center Co., Ltd., Tianjin Internal Combustion Engine Research Institute (Tianjin Motorcycle Technology Center), SAIC Motor Corporation Limited, Pan Asia Automotive Technology Center Co., Ltd., Tongji University, Shanghai Diesel Engine Co., Ltd. company. The main drafters of this document. Yuan Weiping, Song Endong, Song Xiangtai, Yang Kai, Hu Aihua, Jiang Changlong, Jing Yabing, Liu Tao, Wang Xiaohu, Zhou Yi, Ye Huaihan, Sun Ming, Qiao Liangliang, Liu Ying, Zhang Lifeng, Zhuang Guogang. Measurement method for combustion noise of reciprocating internal combustion engine

1 Scope

This document specifies a method for measuring the cylinder pressure of reciprocating internal combustion engines to calculate combustion noise. This document applies to the reciprocating internal combustion engine defined in GB/T 21404 (hereinafter referred to as "engine" unless otherwise specified).

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document. GB/T 1859.1 Determination of sound power level by sound pressure method for reciprocating internal combustion engines - Part 1.Engineering method GB/T 1859.3 Determination of sound power level by sound pressure method of reciprocating internal combustion engine - Part 3.Semi-anechoic chamber precision method GB/T 1883.1 Reciprocating Internal Combustion Engine Vocabulary Part 1.Engine Design and Operation Terminology GB/T 3241-2010 Electroacoustic Octave and Fractional Octave Filters GB/T 3785.1-2010 Electroacoustic Sound Level Meter Part 1.Specification GB/T 3785.3-2018 Electroacoustic Sound Level Meter Part 3.Periodic Test 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 6072.3 Performance of Reciprocating Internal Combustion Engines Part 3.Test Measurements GB/T 21404 General requirements for determination and measurement methods of internal combustion engine power

3 Terms and Definitions

GB/T 1883.1, GB/T 3785.1-2010, GB/T 21404 and the following terms and definitions apply to this document. 3.1 cylinderpressure pc The pressure of the working fluid in the engine cylinder. Note. The unit is Pa (Pa). 3.2 Lpc The base 10 logarithm of the ratio of the square of the cylinder pressure pc to the square of the reference cylinder pressure p0 is multiplied by 10. Note 1.The cylinder pressure level Lpc can be calculated by formula (1). Lpc =10lg( p2c p20 ) (1) where. pc---cylinder pressure, the unit is Pa (Pa);

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