Dongfeng commercial four original car with urea solution

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we have a detailed understanding of the car with urea is defined, then why such an ordinary urea solution and in four together in the teeth of the storm pushed to heavy truck energy conservation? "You do not know the car with urea" will be a further interpretation, to tell you about the car with urea and the close relationship between the four countries. First look at the experience of foreign pioneers. In order to meet Euro IV ~ VI European emissions regulations, heavy commercial vehicles and diesel in Europe machine enterprise mainly adopts two emission control techniques: one is "combustion optimization +SCR (selective catalytic reduction) technology route, SCR route, it is through the optimization of fuel injection and combustion process, try to control the particles in PM in the machine, and the machine in the postprocessing process, using urea solution to carry out selective catalytic reduction of nitrogen oxides NOx, this technology mainstream in Europe, the European long-distance truck almost all using this program. The second is "EGR+DOC/DPF/POC (exhaust gas recirculation + diesel oxidation catalyst / diesel particulate filter / particulate oxidation catalyst) technology route, among which the most widely used EGR+DPF", referred to as the EGR+ route, which is based on the exhaust gas recirculation, the inhibition of NOx in the machine production of diesel oxidation catalytic converter, or using a diesel particulate filter in the machine postprocessing process (mainstream), or particle oxidation catalyst PM for catalytic oxidation or filter capture, this technique which is the mainstream in the North American market (the European short distance transportation and city buses also choose this program). Our implementation of national emission standards for four is an important source for motor vehicle pollution has become the domestic air pollution, motor vehicle pollution is an important cause of haze and photochemical smog pollution. The emissions of nitrogen oxides and PM2.5 of diesel engine are large, and the environment pollution is serious. Domestic diesel vehicles to reach the national four emission standards, more than two technical routes for reference. Two technical routes have their advantages and disadvantages.