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GB/T 14097-2018 English PDF (GBT14097-2018)

GB/T 14097-2018 English PDF (GBT14097-2018)

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GB/T 14097-2018: Reciprocating internal combustion engines -- Limit values of emitted noise

This Standard specifies the sound power level limit values of emitted noise of 4 grades for reciprocating internal combustion engines. This Standard applies to the reciprocating internal combustion engine defined in GB/T 21404.
GB/T 14097-2018
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 27.020
J 91
Replacing GB/T 14097-1999, GB/T 15739-1995
Reciprocating internal combustion engines -
Limit values of emitted noise
ISSUED ON. FEBRUARY 6, 2018
IMPLEMENTED ON. SEPTEMBER 1, 2018
Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the PRC;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 5
4 Measurement methods ... 6
5 Limit values of emitted noise ... 7
6 Judgement method ... 8
7 Identification ... 8
Appendix A (Informative) Example for assessment of engine noise grade ... 10 Foreword
This Standard is drafted in accordance with the rules given in GB/T 1.1-2009. This Standard replaces GB/T 14097-1999 ?€?Noise limits for small and medium power diesel engines?€? and GB/T 15739-1995 ?€?Noise limitation of small gasoline engine?€?.
As compared with GB/T 14097-1999 and GB/T 15739-1995, the main technical changes of this Standard are as follows.
- MODIFY the scope of application of the standard;
- ADD terms and definitions;
- MODIFY the measurement methods of emitted noise, and SUPPLEMENT
the treatment regulations for specific sound source noises and the
operating conditions of engine;
- GIVE the formula for limit values of emitted noise, and ADD engine noise grade regulations and its assessment method;
- ADD the identification of engine noise grade.
This Standard was proposed by China Machinery Industry Federation.
This Standard shall be under the jurisdiction of National Technical Committee 177 on IC Engines Standardization Administration of China (SAC/TC 177). Drafting organizations of this Standard. Shanghai Internal Combustion Engine Research Institute, Commercial Vehicle Technology Center of SAIC Motor
Corporation Limited, Tianjin Internal Combustion Engine Research Institute, SAIC Motor Corporation Limited, Shanghai Motor Vehicle Inspection
Certification and Tech Innovation Center Co., Ltd., Kunming Yunnei Power Co., Ltd., Tongji University, Zhejiang University, Xuelong Group Co., Ltd., Shanghai Diesel Engine Co., Ltd., Changchai Co., Ltd., Jiangsu University.
Main drafters of this Standard. Yuan Weiping, Hu Aihua, Jing Yabing, Yang Kai, Cao Jiajun, Liu Tao, Jiang Changlong, Ye Huaihan, Zhang Haifeng, Zhou Yi, Shi Songyan, Zhuang Guogang, Hao Zhiyong, Yin Bifeng, Liu Baohua, Xiong Fei, Xia Yueli, Zhu Xiaotian, Yu Leibin.
The previous editions of the standard replaced by this Standard were released as follows.
- GBN 259-1986, GB 14097-1993, GB/T 14097-1999;
Reciprocating internal combustion engines -
Limit values of emitted noise
1 Scope
This Standard specifies the sound power level limit values of emitted noise of 4 grades for reciprocating internal combustion engines.
This Standard applies to the reciprocating internal combustion engine defined in GB/T 21404 (unless otherwise specified, hereinafter known as ?€?engine?€? for short).
2 Normative references
The following documents are indispensable for the application of this document. For the dated references, only the versions with the dates indicated are applicable to this document. For the undated references, the latest version (including all the amendments) are applicable to this document.
GB/T 1859.1 Reciprocating internal combustion engines - Measurement of
sound power level using sound pressure - Part 1. Engineering method
GB/T 1859.3 Reciprocating internal combustion engines - Measurement of
sound power level using sound pressure - Part 3. Precision methods for
hemi-anechoic rooms
GB/T 8170 Rules of rounding off for numerical values and expression and
judgement of limiting values
GB/T 21404 Internal combustion engine - Determination and method for the measurement of engine power - General requirements
3 Terms and definitions
The terms and definitions defined in GB/T 1859.1, GB/T 1859.3, and GB/T 21404 and the following are applicable to this document.
3.1 Engine noise grade
A division based on the engine noise level.
3.2 Engine noise grade 1; ENG1
The engine whose sound power level measured values for all operating
conditions are less than or equal to its corresponding Grade 1 sound power level limit values.
3.3 Engine noise grade 2; ENG2
The engine whose sound power level measured values for all operating
conditions are less than or equal to its corresponding Grade 2 sound power level limit values, and whose sound power level measured value for at least 1 operating condition is greater than its corresponding Grade 1 sound power level limit value.
3.4 Engine noise grade 3; ENG3
The engine whose sound power level measured values for all operating
conditions are less than or equal to its corresponding Grade 3 sound power level limit values, and whose sound power level measured value for at least 1 operating condition is greater than its corresponding Grade 2 sound power level limit value.
3.5 Engine noise grade 4; ENG4
The engine whose sound power level measured value for at least 1 operating condition is greater than its corresponding Grade 3 sound power level limit value.
4 Measurement methods
4.1 General
The engine noise measurement shall be carried out in accordance with the provisions of GB/T 1859.3 preferentially, or may be carried out in accordance with the provisions of GB/T 1859.1.
Note. The measurement uncertainty specified in GB/T 1859.3 is smaller than that specified in GB/T 1859.1, but the working condition and operating conditions of engine are exactly the same.
4.2 Acoustic treatment of specific sound sources
The acoustic treatment of specific sound sources such as engine inlet noise, exhaust noise, and cooling fan or blower noise shall be in accordance with the provisions of Table 1.

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