Emission Concept and Calibration for a Lean Burn Hydrogen Engine Hybrid Powertrain in a Passenger Car Application / Emissionskonzept und Applikation für einen PKW H2 Magermotor Hybrid Antriebsstrang

What is it about?

Following a technology open approach, and complementary to fuel cells, hydrogen engine powertrains are considered as a potentially attractive solution for future well-to-wheel and life cycle CO2 neutral mobility. The integration of hydrogen engines into hybrid powertrains can provide additional functional benefits. Within a joint research project, Aramco Europe, Hyundai Motor Company, Hyundai Motor Europe Technical Center, Robert Bosch GmbH and Umicore investigate the potential of such a powertrain for a passenger car application. This paper presents results on the development of a dedicated exhaust gas aftertreatment system and the resulting calibration for a lean burn hydrogen engine of a Hyundai hybrid powertrain in transient operation. A 1.6 l T-GDI gasoline base engine was modified into a H2 TC DI engine using low pressure hydrogen direct injection and hydrogen ECU hard- and software from Bosch. Dedicated catalysts and a particulate filter from Umicore as well as an AdBlue® dosing system and exhaust gas sensors from Bosch have been specified and applied to the powertrain. Following a system approach, engine parameters in stationary and transient engine operation as well as urea dosing strategy of the dedicated aftertreatment system were optimized. Low engine-out and zero-impact tailpipe emissions in transient, warm engine operation such as RDE driving cycles are demonstrated on the engine dyno, confirming the potential of hydrogen engine hybrid powertrains as an attractive solution for CO2 neutral mobility in future passenger cars.

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Photo by Tulen Travel on Unsplash

Photo by Tulen Travel on Unsplash

Why is it important?

A dedicated exhaust gas aftertreatment system is developed and applied to a hydrogen lean burn passenger car engine, showing the potential for zero-impact tailpipe emissions.