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GB/T 41161-2022Reciprocating internal combustion engines—Measurement method for combustion noise (English PDF)

往复式内燃机燃烧噪声测量方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

March 9, 2022

Implementation date

October 1, 2022

Scope

GB/T 41161-2022 is the English-translated version of 往复式内燃机燃烧噪声测量方法.

GB/T 41161-2022 is the Chinese national method for measuring the combustion noise of a reciprocating internal combustion engine.

It describes the measurement of the cylinder pressure, the instrumentation and its mounting, the operating conditions of the engine during the measurement, the signal processing by which the pressure trace is turned into a combustion noise level, and the test report.

It applies to the reciprocating engines defined in GB/T 21404, and it separates the noise that comes from combustion from the mechanical noise of the engine. Engine makers and their development and noise laboratories use it. Issued on 9 March 2022, it has applied since 1 October 2022.

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Document preview — GB/T 41161-2022

National Standard of the People's Republic of China

ICS: 27.020
Classification: J 93

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 Measurement Environment
4.1 Acoustic Environment
4.2 Weather conditions
5 Measuring instruments
5.1 General
5.2 Check
5.3 Use
6 Working conditions
6.1 General
6.2 Installation conditions
6.3 Operating conditions
7 measure
7.1 General
7.2 Cylinder pressure sensor arrangement
7.3 Determination of crankshaft angle zero position
7.4 Cylinder pressure test
8 Calculate
8.1 General
8.2 Calculation of combustion noise
9 Record content
10 Report

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.

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

The pressure of the working fluid in the engine cylinder.

Note: The unit is Pa (Pa).

3.2 Cylinder pressure level

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). ) (1) where. pc---cylinder pressure, the unit is Pa (Pa);

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 18 pages — is available in the English PDF.

Referenced standards

Normative references

Similar standards

GB/T 10398-2026|GB/T 10826.1-2025|GB/T 1147.1-2025|GB/T 1147.2-2025|GB/T 14096-2025|GB/T 45646-2025

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