At present,SCR(Selective Catalytic Reduction)technology is one of the most important means to reduce NOx in diesel exhaust.Along with the advancement of localization process,highly integrated post-pro-cessing control unit DCU is widely attention,the paper theoretically explains the localization of post-processing control system information interaction between DCU and engine control unit ECU,and through the discharge cy-cles and vehicle road test shows that the method satisfies the requirement of China'phase six laws and regula-tions,Further expansion and affirmation of domestic DCU application market potential.
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