Abstract: An engine exhaust aftertreatment system is disclosed. The system may comprise: 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 reductant injector situated downstream of the turbocharger, wherein the reductant injector is closely coupled to the turbocharger such that a reductant is injected into an exhaust flow of the turbocharger; a first container downstream of the reductant injector, the first container including a multi-functional catalyst (MFC); and a second container downstream of the first container, the second container including a selective catalytic reduction (SCR) component and an Ammonia catalyst (AMOx) component.

Abstract: An engine exhaust aftertreatment system is disclosed. The system may comprise: 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 reductant injector situated downstream of the turbocharger, wherein the reductant injector is closely coupled to the turbocharger such that a reductant is injected into an exhaust flow of the turbocharger; a first container downstream of the reductant injector, the first container including a multi-functional catalyst (MFC); and a second container downstream of the first container, the second container including a selective catalytic reduction (SCR) component and an Ammonia catalyst (AMOx) component.

Abstract: A regeneration control system for an oxidation catalyst in an internal combustion engine includes a temperature sensor to produce a temperature signal indicative of an exhaust inlet temperature that is below a regeneration temperature for accumulated hydrocarbons on the oxidation catalyst, an electrically actuated boost leakage valve, and a regeneration control unit. The regeneration control unit commands an adjustment to the position of the electrically actuated boost leakage valve to increase leaked boost to increase exhaust temperature to the regeneration temperature by way of increased air-fuel ratio. Related methodology is disclosed.

Abstract: A regeneration control system for an oxidation catalyst in an internal combustion engine includes a temperature sensor to produce a temperature signal indicative of an exhaust inlet temperature that is below a regeneration temperature for accumulated hydrocarbons on the oxidation catalyst, an electrically actuated boost leakage valve, and a regeneration control unit. The regeneration control unit commands an adjustment to the position of the electrically actuated boost leakage valve to increase leaked boost to increase exhaust temperature to the regeneration temperature by way of increased air-fuel ratio. Related methodology is disclosed.