Vehicle Noise Standards System of China 1 1

The noise standards system plan of China 5. Wind noise (exterior and interior) 3. Pass by noise 50km/h 4. Cruise and coast down noise 80 Speed, km/h 6. Cruise noise 50km/h 60 8. Brake squeal 40 7. Compressed air noise (service brake) 2. ASEP 20 9. QRTV 1. Stationary noise 10. Compressed air noise (parking brake) 11. Compressed air noise (pressure regulator) The compressed air noise is emergently needed and ASEP should be put into research. 2

Special condition of ASEP City express 80 Speed, km/h 60 40 ECE ASEP China ASEP 20 80km/h cruise noise is also very important for China. 3

Stationary noise The stationary noise standard with a requirement for in use vehicles will make sense for forbidding the change of exhaust system and control the in use vehicles well. 4

Compressed air noise Speed, km/h 80 Speed, km/h 60 Braking air noise 40 20 Parking air noise Regulator sound ＊With the compressed air noise, China noise standards will be better harmonized with ECE R51. 5

Interior noise China has now more than 310 000 000 drivers in year 2016 and the acoustic environment inside the vehicle is also very important for such huge numbers of drivers. For the reason of this, in the future we should pay more attention to interior noise especially for heavy commercial vehicle drivers who drive the vehicle several hours a day. 6

New technology(electric vehicles) Rated power 124 (Motor) 110 Peak power 220 Torque 3000 N.m S 1250rpm This bus belongs to the sub-category with Pn no more than 150kW, so: 76dB(A) from 2016; 74 dB(A) from 2020; 73 dB(A) from 2020. We should plan and draft new noise standards for electric vehicles. 7

Thanks for your attention National Automotive Standardization Technical Committee Thanks for your attention Web site：www.catarc.org.cn 8