Simultaneous Reduction of NOx and Fuel Consumption for Off-Road Powertrains Eaton

Format:

Book

Conference/Event

Author/Creator:

McCarthy, Jr.,, James, author.

Wine, Jonathan, author.

Bradley, Ryan, author.

Hasseman, Andy, author.

Prikhodko, Vitaly, author.

Howell, Thomas, author.

Conference Name:

WCX SAE World Congress Experience (2026-04-14 : Detroit, Michigan, United States)

Language:

English

Subjects (All):

Fuel consumption.

Nitrogen oxides.

Engines.

Selective catalytic reduction (SCR).

Powertrains.

Turbochargers.

Catalysts.

Exhaust gas recirculation (EGR).

Local Subjects:

Fuel consumption.

Nitrogen oxides.

Engines.

Selective catalytic reduction (SCR).

Powertrains.

Turbochargers.

Catalysts.

Exhaust gas recirculation (EGR).

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2026

Summary:

Simultaneously reducing criteria pollutants and fuel consumption is important for clean air and improving vehicle total cost of ownership. The goal of this effort was focused on a 90% NOx reduction and 10% fuel savings for an off-road 407 kW diesel engine. The baseline was a production Fiat Powertrain 13L engine and aftertreatment system meeting 0.4 g/kW-hr NOx. The baseline system was quantified over the NRTC, RMC, new low load cycle and five field cycles. A next generation engine was built incorporating several fuel-efficient design features, including a higher compression ratio, increased fuel-rail pressure, low-friction piston rings, and a high-efficiency variable-geometry turbocharger. Cylinder deactivation and EGR pump technologies were added to this engine as well. The combination was optimized prior to adding advanced aftertreatment systems, showing the trade-off of engine out NOx and exhaust temperature. Two next-generation catalyst technologies were employed into a LO-SCR plus main SCR system, both with and without an electric heater upstream of the LO-SCR. These catalysts were hydrothermally aged to simulate significant field use. Dual SCR dosing with newly developed controls played a critical role in achieving the proper split between the upstream LO-SCR and the downstream main SCR. Adding a next generation mixer for the downstream SCR proved essential in obtaining the final results. The optimal configuration required adding an electric heater to elevate the exhaust temperature at the LO-SCR for early cycle NOx reduction. The final results showed a 94.8% NOx reduction and 15.7% fuel savings on the composite NRTC

Notes:

Vendor supplied data

Access Restriction:

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