Impacts of De‐NO <i> _x </i> system layouts of a diesel passenger car on exhaust emission factors and monetary penalty

Automobile emissions are significantly dependent on the after-treatment system performance, which is partly determined by exhaust temperature. Regarding diesel passenger cars, systems generally include oxidation catalyst (DOC), particulate filter (DPF), and selective catalytic reduction (SCR). The layouts affect their temperature variations because of heat loss thermal capacity tailpipes systems. As for original layout DOC+DPF+SCR, nitrogen oxides (NOx) main concerns vehicle emissions, especially under cold-start conditions. Ammonia Creation Conversion Technology (ACCT) shows excellent performance reducing NOx emissions; additionally, damage costs individual different greatly, may change priority emission reductions when considering monetary penalty. In this article, impacts were investigated based a car; SCR ACCT as De-NOx devices adopted individually in corresponding scenarios; assessed from viewpoints both factors results indicated that presented much better effectiveness than over layouts. efficiency was very sensitive to operation conditions upstream devices. layout-1 DOC+ACCT+DPF showed lowest global car. DPF easier achieve regeneration due its shortest distance engine. layout-2 ACCT+DOC+DPF had minimum penalty factor