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

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. 2

3. 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

4. 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

5. 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

6. 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

7. 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

8. 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

9. Thanks for your attention
National Automotive Standardization Technical Committee
Thanks for your attention
Web site： 9