EURO VII Diesel After Treatment System going the extra mile All You Need From Turbo To Tailpipe Pre-box with e-heater and 2 possible catalyst concepts Concept 1: cc-Diesel Oxidation Catalyst (cc-DOC) concept on metallic substrate & Urea mixing chamber The heater accelerates the heat-up time during cold-start conditions to reach the light off for THC and CO oxidation and to reach the injection temperature of AdBlue earlier. The cc-DOC generates also sufficient NO 2 for the DeNOX function of the SCR system in the main box which is designed to generate very low N2O emissions. The main box contains two SCR catalysts, whereas the first one is placed directly at the inlet to benefit from the early AdBlue dosing. The main box contains the DOC/ DPF and the second SCR whereas the PGM loading on the DPF is adjusted to ensure passive regeneration and to support the DeNOX function of the second SCR. Concept 2: Urea mixing chamber with cc-Selective Catalyst Reduction (cc-SCR) concept on metallic or ceramic substrate The heater accelerates in cold exhaust gas conditions the heat up to earlier achieve the injection temperature of AdBlue for the cc-SCR. The cc-SCR comprises a coating with a high DeNOX function at very low NO 2 content in the exhaust gas and the size is designed to cover mainly cold start and low load conditions. The main box contains the DOC, the DPF and the second SCR whereas the PGM loading on the DOC and DPF is adjusted to ensure passive regeneration and to support the DeNOX function of the second SCR. Concept 1 Pre-box SCR2 Compact Mixer cDPF SCR1 cc- DOC E - heater Main box SCR2 Compact Mixer cDPF DOC cc- SCR Concept 2 Dinex.net
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