Combustion and emission characteristics of an ultra-lean burn gasoline engine with dimethyl ether auto-ignition

Bang-Quan He, Si-Peng Xu, Xue-Qing Fu and Hua Zhao

Energy, 2020, vol. 209, issue C

Abstract: To stabilize combustion and shorten combustion duration in ultra-lean homogeneous gasoline-air mixture conditions, the onset of combustion is initiated with the auto-ignition of direct injection dimethyl ether (DME) only through compression in a single-cylinder four-stroke gasoline engine at the lambda of 2.1 at fixed cycle energy. The results show that the heat release processes are dependent on the total DME energy fraction in a cycle in the case of single and split direct injection and the DME fraction in each injection in the case of split direct injection. Increased total DME energy fraction in a cycle decreases the in-cylinder temperature to start low temperature combustion. High DME energy fraction in the second direct injection at a fixed total DME energy fraction in a cycle advances ignition timing, shortens combustion duration and decreases cycle-by-cycle variation of combustion while nitrogen oxides emissions increase although hydrocarbon and carbon monoxide emissions decrease simultaneously. The decrease of the total DME energy fraction in a cycle or that of DME fraction in the second injection at a fixed total DME energy fraction in a cycle is beneficial to the reduction of NOx emissions.

Keywords: Gasoline; Engine; Direct injection; Port fuel injection; Dual fuel (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544220315450
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:209:y:2020:i:c:s0360544220315450

DOI: 10.1016/j.energy.2020.118437

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().