Optimizing Efficiency and NOx Emissions: Experimental Investigations of Hydrogen High-Pressure Direct Injection on a Heavy-Duty Single-Cylinder Research Engine
conference paper
The H2-ICE emerges as a promising pathway for complying with upcoming heavy-duty CO2 regulations. Several concepts are being investigated, where HPDI stands out for its excellent efficiency and performance. HPDI combustion is characterized by a hydrogen diffusion flame ignited by a diesel pilot. Significant NOx formation arising from diffusive combustion limits the maximum efficiency. In this paper, use of EGR and various fueling strategies are explored to optimize NOx emissions on a 1.8L single-cylinder engine. Although peak efficiency is constrained by NOx, it is shown that >50% indicated efficiency is possible with sufficiently low NOx toward compliance with future legislation.
Topics
TNO Identifier
997227
ISSN
01487191
Publisher
SAE International
Article nr.
20245318
Source title
2024 JSAE Annual Congress (Spring)
Collation
7 p.
Files
To receive the publication files, please send an e-mail request to TNO Repository.