Experimental investigation of the performance of a two-stage charging system with an E-compressor and a VGT on a direct injection hydrogen engine

Ning Ma, Bai gang Sun, Qing he Luo*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

To further optimize the performance of H2ICE while maintaining ultra-low NOx emissions, a high-performance air charging system is crucial. This study investigates the effects of an E-compressor and the combined impact of the E-compressor and a VGT on a 2.0L direct-injection H2ICE. Compared to a single VGT, the E-compressor increases torque by 12.73%–135.5 Nm and reduces NOx emissions from 537 ppm to zero at 1000 rpm. At 3000 rpm, the torque increases by 2.2%, and NOx emissions drop by 50.9%. The E-compressor boosts the λ from 2.0 to 4.5, BTE from 33.73% to 34.38%, BD from 12.32°CA to 27.25°CA, and VE from 0.72 to 0.95 at 1000 rpm. These results highlight the effectiveness of the E-compressor in improving H2ICE intake and combustion performance, particularly under low-speed conditions. The two-stage charging system significantly reduces NOx emissions, achieving reductions of up to 95.9% at 1500 rpm and 84.7% at 2000 rpm, while maintaining a balance between torque, emissions, and efficiency. The findings demonstrate that the E-compressor and VGT combination extends the H2ICE's operating range, enabling higher performance and cleaner combustion under various conditions. This study provides valuable insights for developing high-performance H2ICEs with minimal environmental impact.

Original languageEnglish
JournalInternational Journal of Hydrogen Energy
DOIs
Publication statusAccepted/In press - 2025

Keywords

  • E-compressor
  • Hydrogen internal combustion engine
  • NOx emissions
  • VGT

Fingerprint

Dive into the research topics of 'Experimental investigation of the performance of a two-stage charging system with an E-compressor and a VGT on a direct injection hydrogen engine'. Together they form a unique fingerprint.

Cite this

Ma, N., Sun, B. G., & Luo, Q. H. (Accepted/In press). Experimental investigation of the performance of a two-stage charging system with an E-compressor and a VGT on a direct injection hydrogen engine. International Journal of Hydrogen Energy. https://doi.org/10.1016/j.ijhydene.2025.01.240