Highly integrated exhaust aftertreatment systems in heavy-duty applications
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The steadily stricter emissions regulations are forcing the engine manufacturers to look for new solutions for exhaust gas aftertreatment, in order to implement emissions legislation on the one hand and, on the other hand, to meet the OEM’s desire not to have to increase the engine compartment. MAN has therefore investigated and evaluated the effects resulting from the integration of several functionalities on a single component.
The application of highly integrated exhaust aftertreatment systems like SDPF (selective catalytic reduction (SCR) coated diesel particulate filters (DPF)) allows both a reduction of required package space and functional advantages  like reduced emissions compared to conventional systems. In particular, for engine cold start, earlier DEF dosing and thus reduced tailpipe emissions can be achieved by improving system heat-up through bringing SCR functionality further upstream within the exhaust aftertreatment system .
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