Lookup NU author(s): Dr Boru Jia,
Professor Tony Roskilly
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).
The free-piston diesel engine linear generator (FPDLG), as a novel energy conversion device, is investigated bymany researcher groups. The injection characteristics are important for the FPDLG operation performance.Therefore, the effects of fuel injection characteristics on the FPDLG are researched by CDF simulation andexperimental results in this paper. According to the results, it is found that the trends of the compression ratioand the peak in-cylinder pressure vs the injection timing are the identical with convex function curves. And theIMEP of the FPDLG also show the same trend. Although the heat-release rises in the rapid combustion period, theIMEP vs the injection timing various law present convex function curve on account of reduced heat-release in thenormal combustion period. Four injection rate-profiles, i.e. rectangle, wedge, trapezium and triangle are simulatedand compared. It is observed that the combustion process with the trapezium rate-profile curve issmoother. The peak in-cylinder pressure and the thermal efficiency can be kept high value while the center ofheat-release curve near the TDC. Therefore the trapezium rate-profile is suggested is appropriate and can keephigh efficiency of the FPDLG in order to get high engine efficiency.
Author(s): Guo C, Song Y, Feng H, Zuo Z, Jia B, Zhang Z, Roskilly A
Publication type: Article
Publication status: Published
Journal: Energy Conversion and Management
Print publication date: 15/03/2018
Online publication date: 02/02/2018
Acceptance date: 20/01/2018
ISSN (print): 0196-8904
ISSN (electronic): 1879-2227
Publisher: Elsevier Ltd
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