SAE technical papers on CD-ROM/SAE technical paper series, Journal Year: 2025, Volume and Issue: 1
Published: April 1, 2025
<div class="section abstract"><div class="htmlview paragraph">Introducing hydrogen (H<sub>2</sub>) into the intake air of diesel engines provides a near-term approach to reducing tailpipe CO<sub>2</sub> emissions from heavy-duty commercial vehicles. The premixed results in complex H<sub>2</sub>-Diesel dual fuel (H<sub>2</sub>DF) combustion process, where H<sub>2</sub> can both participate non-premixed and result propagating H<sub>2</sub>/air combustion. These interactions influence engine characteristics, including in-cylinder pressure heat release rate (HRR), as well emissions. nature extent impact depends on amount introduced function total energy (H<sub>2</sub> share ratio - HES), trapped mass, operating conditions. To optimize HES under different conditions, it is crucial understand how H<sub>2</sub>DF differs this limits operation impacts investigate these effects, class 8 truck fitted with an system developed by Hydra Energy Corp. was tested chassis dynamometer. suite instrumentation, pressure, temperature, exhaust flow rate, measurement equipment. Tests were conducted over three loads speeds at fixed ratios, detailed studies low- mid-load cases 1200 RPM. show that introduction significantly characteristics emissions, primarily influenced equivalence ratio, control unit’s adjustments boost injection timing playing critical role engine-out At higher ratios than 0.1, flame forms, advancing phasing, which increases maximum rise reduces PM while raising NOx Pcyl HRR data are used develop semi-predictive model imposing net profile using multi-Wiebe function. A four-curve Wiebe accurately capture across points, providing reliable predictive tool given speed/load for various ratios. understanding valuable insight techniques future further improve utilization strategies tailored retrofit applications.</div></div>
Language: Английский