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Characterizing Hydrogen-diesel Dual-fuel Performance and Emissions in a Commercial Heavy-duty Diesel Truck

Abstract

This study investigates hydrogen (H2) as a supplementary fuel in heavy-duty diesel engines using pre-manifold injection. A H2-diesel dual-fuel (H2DF) system was implemented on a commercial class-8 heavy-duty diesel truck without modifying the original diesel injection system and engine control unit (ECU). Tests were conducted on a chassis dynamometer at engine speeds between 1000 and 1400 rpm with driver-demanded torques from 10 to 75%. The hydrogen energy fraction (HEF) was strategically controlled in the range between 10 and 30%. Overall, CO2 reduction (comparable to the HEF level) was achieved with similar brake-specific energy consumption (BSEC) at all loads and speeds. To maintain the same shaft torque, the driver-demanded torque was reduced in H2DF operation, which resulted in a lower boost pressure. At higher loads, engine-out BSNOx slightly decreased, while BSCO and black carbon (BC) increased significantly due to lower oxygen concentration resulting from the lower boost pressure. At lower loads, engine-out BSCO and BSBC decreased moderately, while NO2/NO ratio increased substantially in H2DF operation. Deliberate air path and diesel injection control are expected to enable higher HEF and GHG reductions.

Funding source: Financial support was provided by NSERC Alliance (ALLRP 567140) and Mitacs Accelerate (IT22898) programs in collaboration with Hydra Energy Canada Corporation. This project was undertaken with financial support from the Government of Canada.
Related subjects: Applications & Pathways
Countries: Canada
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/content/journal6119
2024-09-04
2024-11-21
/content/journal6119
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