A renewable clean energy application: Oxyhydrogen negative pressure inhalation for enhancing the combustion and emission characteristics of isopropanol/gasoline dual-fuel combined injection engine

Weibo Shi, Zihang Li, Zhe Zhao, Xiumin Yu, Ping Sun, Tao Sang, Wei Dong and Ming Li

Energy, 2024, vol. 290, issue C

Abstract: The energy crisis and increasing environmental pollution have made reducing the use of fossil fuels an urgent task. Isopropanol is a renewable alternative fuel with excellent properties. However, its excessive latent heat of vaporization leads to the engine performance weakening when blended in large proportions. In order to solve this problem, this study couples the oxyhydrogen supply system with the combined injection engine to realize the fuel supply mode of mode of oxyhydrogen negative pressure inhalation + isopropanol direct injection + gasoline port injection (ONPI + IDI + GPI). The results show that ONPI effectively improves the tolerance of the engine to the isopropanol and the optimal IDIr is gradually increased with the increase of ONPIv. For example, the IDIr corresponding to the optimal Pmax and CA 10–90 both increase from 60 % to 80 % with the increase of ONPIv. Meanwhile, the combination of IDI and ONPIv also improves the engine combustion characteristics. With the increase of ONPIv from 0 to 16 L/min, the optimal CA 0–10, HC, and TPN emission are decreased by about 27.94 %, 82.6 %, and 71.35 %, respectively, and the IMEP and torque are improved by about 8.77 % and 12.37 % compared to the original engine (ONPIv = 0 L/min, IDIr = 0 %), respectively. CO emission and CoVIMEP are mainly affected by IDI. The CoVIMEP and CO emission under IDIr = 100 % are reduced by about 40.77 % and 23.76 % on average compared with that under IDIr = 0 %, respectively. IDI also improves the surge of NOx emission caused by ONPI and NOx emission can still be slightly lower than the original engine level under ONPIv = 12 L/min and IDIr = 80 %. “60 %≤IDIr≤80 %+ONPIv = 16 L/min” is the optimal fuel supply control strategy for ONPI + IDI + GPI engine.

Keywords: Oxyhydrogen; Isopropanol direct injection; Gasoline port injection; Combustion; Emission (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:290:y:2024:i:c:s0360544223036083

DOI: 10.1016/j.energy.2023.130214

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