Guiding device and guiding method for diesel engine selective catalytic reduction (SCR) system for automobile
A technology of SCR system and diversion device, applied in the direction of muffler device, exhaust device, mechanical equipment, etc., can solve the problem of affecting the power and economy of diesel engine, underutilization of edge area, large radial temperature and pressure gradient and other problems, to achieve the effect of improving the passing capacity and the utilization rate of the catalyst, reducing the flow sharing rate, and weakening the flow separation.
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[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0031] Diesel engine urea SCR system such as figure 1 with figure 2 As shown, the present invention is installed between the SCR catalytic converter 8 and the bend pipe 2, and its specific structure is as follows: Figure 3 to Figure 6 shown.
[0032] The present invention is a deflector device for the SCR system of a diesel engine for a vehicle, comprising an expansion tube 6 and at least two deflector plates 5 nested with each other. One end of the pipe 6 is the air outlet 7, the inlet end 4 of the expansion pipe 6 is connected with the elbow 2, the deflector 5 is fixedly arranged on the front end of the expansion pipe 6, and its shape is a trumpet shape without front and rear end faces. A fluid channel 12 is formed between them. The quantity of deflector plate 5 is preferably 2 to 4 pieces, and the length of deflector plate 5 is preferably 1 / 3 to 2 / 3 ...
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