Emission Performance Chassis Dynamometer

People enjoy the convenience of the booming automobile industry also suffered a large number of automobile exhaust emissions contribute to urban pollution, the main discharge of pollutants HC, CO and NOx will be the formation of photochemical fog, seriously endanger life and property safety of urban residents. In the past, we use the traditional method and the free acceleration method idle test in car emissions, in addition to its testing conditions and the vehicle's actual driving conditions vary greatly, does not reflect the actual situation in addition, there is also the high rate of miscarriage of justice, human factors many other defects, it is difficult to really filter out high-emission vehicles, therefore, can not repair these vehicles to the real state of compliance for this, use the "load Law" Detection of emissions has become the inevitable trend. As early as 60 years people will have realized the advantages of a load test method, namely through the chassis dynamometer testing of vehicles to be loaded, to enable it to as close as possible the actual driving cycle, thus reflecting the actual situation of the vehicle being tested.
According to China's national standard GB18285-2005 "fire engine vehicle exhaust emission limits and measurement methods (double-idling law and BASM)", GB 3847-2005 "auto-compression-ignition engines and compression-ignition engines automobile exhaust smoke emission limits and measurement methods ", in the car emissions testing load method (also known as" BASM ") include the following:
1, steady-state method, referred to as ASM (Acceleration Simulation Mode, the ASM method), this method first appeared in the United States, testing object is petrol, its driving cycle diagram is as follows: