Driving conditions and conclusions of China on ASEP test method 4th ASEP IWG, 11-13 July, 2017 Washington D.C., USA. Driving conditions and conclusions of China on ASEP test method 1 1

Real driving conditions of China (M1 category) Remark: This figure is analyzed from part data of the Project of China Automotive Test Cycles and can not represent the project officially. 2

Real driving conditions of China (M1 category) Remark: This figure is analyzed from part data of the Project of China Automotive Test Cycles and can not represent the project officially. 3

The real complains from residents Most of complains are for high way and express cross the residence areas. Transport noise *Figure left from: China Environmental Noise Prevention and Control Annual Report(2016). *Figure middle and right from: Ms. XIE HUI, Tianjin environment monitoring center. 4

Typical test conditions concerned Stable noise - Speed (road speed near the residence area, road speed on the express), tyre, road surface. Burst noise -Power hided in passenger cars (engine speed highly changes cause by kick-down, exhausted noise not necessary and driving behavior ). -After market (modified mufflers of motorcycles and passenger cars ). For ASEP: -Stable noise (vehicle speed, engine acceleration). -Burst noise (engine acceleration, vehicle acceleration). 5

How to simplify the test methods Engine speed and engine acceleration -Engine speed (test vehicle on stationary with engine speed: 20%, 50%, 80% of rated engine speed). -Engine acceleration (test vehicle on stationary with engine speed goes up from 20% to 80% of rated engine speed). Vehicle speed and vehicle acceleration -Vehicle speed (cruise tests with speed 30km/h, 50km/h and 70km/h). -Vehicle acceleration (acceleration tests) Vpp’=30km/h, 50km/h and 70km/h; Gear for 30km/h: (1+i )/2; Gear for 70km/h: (i+1+X)/2,(“X” means the total gears number). 6

Scope and borders Remark：Figure from document of ISO WG42 Glasgow meeting 2016, and China repeated the opinion during the ASEP IWG 2nd meeting in Geneva 2017. 7

Conclusion Environment -High speed range 60-80km/h should be considered during ASEP test. Transport -The speed range 0-80km/h should be considered during ASEP test, especially the low speed range 20-40km/h. Industry -Which cars need ASEP? How to decide the scope, borders and the exact test method. Environment Industry Transport 8

Thanks for your attention National Automotive Standardization Technical Committee Thanks for your attention Web site：www.catarc.org.cn 9