Engine aftertreatment system

An engine exhaust aftertreatment system, comprising:

• an internal combustion engine having an intake passage and an exhaust passage;
• a turbocharger fluidly connected to the internal combustion engine, the turbocharger including a compressor and a turbine, the compressor being in fluid communication with the intake passage, and the turbine being in fluid communication with the exhaust passage;
• a first reductant injector situated downstream of the turbocharger;
• a heating element situated downstream of the first reductant injector;
• a first container downstream of the heating element, the first container including a multi-functional catalyst (MFC) component and a catalytic diesel particulate filter (DPF) component;
• a second reductant injector situated downstream of the first container;
• a mixing component and a heating element situated downstream of the second reductant injector;
• a second container downstream of the mixing component and the heating element, the second container including a selective catalytic reduction (SCR) component and an Ammonia catalyst (AMOx) component;
• and
• a tailpipe situated downstream of the second container.

A method of operating an engine exhaust aftertreatment system, comprising:

• providing a flow of exhaust from a turbocharger;
• injecting a reductant into the flow of exhaust within 5 inches downstream of the turbocharger with a first reductant injector;
• after injecting the reductant, heating the flow of exhaust with a first heater;
• providing the flow of exhaust to a first container including a multi-function catalyst (MFC) component;
• injecting additional reductant into the flow of exhaust downstream of the first heater with a second reductant injector;
• and
• after injecting the additional reductant, heating the flow of exhaust with a second heater.