The DOC is significantly smaller than a DPF, freeing up installation space. The combined DOC-SCR system is utilized on Cummins Tier 4 Final engines ranging from 100 hp to 400 hp (75-298 kW).

Modern diesel engines, in order to meet restrictive exhaust emissions standards, must be equipped with a DPF filter and SCR ... engine does not have the SCR system on all markets, that is, the ...