THERMAL SCIENCE

International Scientific Journal

Tingyu Zhao

,

Chun Xia

,

Junhua Fang

,

Lei Zhu

,

Zhen Huang

AN EXPERIMENTAL STUDY ON COMBUSTION AND EMISSIONS CHARACTERISTICS IN A DUAL-INJECTION SPARK-ASSISTED COMPRESSION IGNITION ENGINE FUELED WITH PODE/GASOLINE

ABSTRACT
Spark-assisted compression ignition (SACI) is a potential way to improve thermal efficiency for gasoline engine with a relatively low compression ratio. The dual-injection system and spark strategy are considered to be an effective approach to control the combustion of SACI engine. Polyoxymethylene dimethyl ethers (PODE) is a potential fuel for carbon neutral with high oxygen content and unique molecule structure. In this study, the transition of combustion modes with different equivalence ratio and effects of direct injection ratio on SACI combustion and emissions fueled with PODE/gasoline under different loads were investigated. The results showed that SACI combustion could be achieved with the compression ratio of 13 and the brake thermal efficiencies at 2 bar, 3 bar, and 4 bar under the dual-fuel SACI were increased by 49%, 29%, and 27%, respectively, compared with the gasoline spark ignition mode. The increase in direct injection ratio first shortened the combustion duration and then prolonged. An appropriate direct injection ratio was shown to control the combustion process to achieve high efficiency combustion, at which low total HC, CO, and PM emissions were achieved while the NOx emissions remained at a low level.
KEYWORDS
Spark-assisted compression ignition, dual-injection, Combustion and Emissions, polyoxymethylene dimethyl ethers
PAPER SUBMITTED: 2022-01-09
PAPER REVISED: 2022-05-14
PAPER ACCEPTED: 2022-06-07
PUBLISHED ONLINE: 2023-04-22
DOI REFERENCE: https://doi.org/10.2298/TSCI220109058Z
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2023, VOLUME 27, ISSUE Issue 5, PAGES [3757 - 3768]
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An experimental study on combustion and emissions characteristics in a dual-injection spark-assisted compression ignition engine fueled with PODE/gasoline

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence