The estimation of the in-use emission factor for non-exhaust pipe emissions is corrected by the actual fuel volatility measured by Reid's vapor pressure (RVP), which increases operating losses and serves as a direct emission source for gasoline-powered vehicles; Modeling the effect of fuel vaporization (RVP) on exhaust emission rate; adding many characteristic parameters to allow users to control more factors that affect the level of emission factors, including more IM system design, etc. MOBILE 51993 using new data on vehicle use Updates, including equations based on the new basic emission rate derived from the state's extensive data measured by the IM240 test program; including new evaporative emissions testing procedures (using the impact of non- exhaust emissions levels); California After the regulation, it includes the Low Emission Vehicle (LEV) program model.
China's emission factor model establishes the classification of motor vehicles. Different types of vehicles have huge differences in their own weight, engine type, and purification technologies used, resulting in a large difference in the total amount of pollutants discharged, so in order to accurately calculate different The total number of types of pollutants emitted by motor vehicles, and then the focus of the vehicle pollution control, must be classified according to different emission characteristics, and then the emission factors should be determined for each type of vehicle. At present, China does not have a uniform classification of motor vehicles. Various departments publish statistical data under different classification methods because of different purposes.
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