QC/T 1172-2022 Translated English of Chinese Standard (QC/T 1172-2022, QCT1172-2022): Performance requirements and test methods for vehicle air brake unit exhaust muffler [Buy--download True-PDF in 3-second: https://play.google.com/books > Sign in > This BOOK > "3-dots" > Export > Save as "*.pdf"]This document specifies the terms and definitions, performance requirements, test-related requirements, test methods, of the exhaust muffler (hereinafter referred to as muffler), which is used on the vehicle air brake unit. This document is applicable to the use of automobile air brake components (such as: relay valve, brake valve, trailer control valve, air dryer, etc.), which are used on the vehicle air brake unit. |
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1L air 45L air cylinder 6's indication value according to formula air brake components air dryer Air source arithmetic mean LP2 Arrange sound level bench test methods Calculate the exhaust compressed air dB(A decibels document exhaust noise exhaust port exhaust time hysteresis exhaust time tE2 foreign language version gauge 6's indication GB/T hysteresis ratio index number industry standard including insertion loss Install the muffler interval of 0.5 Keep the sound level meters pointing muffler is damaged muffler is installed muffler matching muffler sample numerical value peak noise value pressure gauge 6's pressure regulating valve projection weld Record LP1 Record the peak Record the relationship relationship curve Remove the muffler Retest the insertion Ruili Schematic diagram shown in Figure sound level meters specified in QC/T Stabilize the pressure standards are published Stop valve test according test device Tested sample three-way control valve trailer control valve two-position three-way control vehicle air brake Zhejiang