Comparative study on effects of injection mode on combustion and emission characteristics of a combined injection n-butanol/gasoline SI engine with hydrogen direct injection

Shang, Z, Yu, X, Ren, L, Wei, G ORCID: https://orcid.org/0000-0003-2613-902X, Li, G, Li, D and Li, Y 2020, 'Comparative study on effects of injection mode on combustion and emission characteristics of a combined injection n-butanol/gasoline SI engine with hydrogen direct injection' , Energy, 213 , p. 118903.

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Abstract

In this paper, on the basis of combined injection technique, three injection modes with five n-butanol/gasoline volume ratios () were put forward, aiming to compare and evaluate the relationship between the injection mode and the combustion and emission characteristics of an n-butanol/gasoline SI engine equipped with an extra hydrogen direct injection system. The results indicated that under low load condition, compared with NGP (n-butanol/gasoline port injection) mode, the NGPD (n-butanol/gasoline combined injection) mode and NGPH (n-butanol/gasoline with hydrogen combined injection) mode can both improve the combustion performance. The peak cylinder pressure of NGPD and NGPH mode was 5.58% and 11.63% higher than that of NGP mode on average, respectively. Furthermore, the combined injection modes concentrated the process of heat release, shortened the combustion duration, increased the power performance and improved the combustion stability at all . As for emissions, the NGPD and NGPH combined modes significantly decreased the HC and CO emissions, but increased the NOX emissions. Among all the test conditions, the NGPH mode with 25% obtained the best combustion quality. Additionally, the effect rules of on combustion and emission characteristics under NGP mode were found to be consistent with those under NGPD and NGPH combined modes.

Item Type:	Article
Schools:	Schools > School of Computing, Science and Engineering > Salford Innovation Research Centre
Journal or Publication Title:	Energy
Publisher:	Elsevier
ISSN:	0360-5442
Related URLs:	Publication
Funders:	National Natural Science Foundation of China, NSFC, China, the State Scholarship Fund organized by the China Scholarship Council (CSC), China and the Ph.D. Interdisciplinary Research Programs Foundation of Jilin University
Depositing User:	Dr Guowu Wei
Date Deposited:	18 Nov 2020 08:07
Last Modified:	15 Feb 2022 17:23
URI:	https://usir.salford.ac.uk/id/eprint/58724

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