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Appl. Sci. 2017, 7(7), 717; doi:10.3390/app7070717

Investigation into the Vibrational Responses of Cylinder Liners in an IC Engine Fueled with Biodiesel

1
Department of Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China
2
Center for Efficiency and Performance Engineering, University of Huddersfield, Huddersfield HD1 3DH, UK
3
Quanjiao Power Co., Ltd., Quanjiao 239500, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Antonio Ficarella
Received: 21 April 2017 / Revised: 27 June 2017 / Accepted: 4 July 2017 / Published: 13 July 2017

Abstract

The paper presents a study of the relationship between the combustion behavior and vibration response of internal combustion (IC) engines fueled with biodiesel based on finite element modelling along with experimental evaluation. An improved finite element (FE) model is established and validated to predict the dynamic responses of cylinder liners with respect to two main sources: combustion shock and piston side thrust. Based on the validated FE model, the response characteristics of the cylinder liner in an IC engine fueled with biodiesel and its causal relationship with excitation sources have been predicted. Due to the lower calorific value of biodiesel, a greater amount of fuel is injected into the combustion chamber to maintain power outputs, which results in a prolonged combustion duration and subsequent higher overall vibration levels, compared with that of diesel. The advanced ignition of biodiesel is the main cause to the compound effect on the coupling of piston side-thrust force, thereby resulting in a nonlinear increase in the root mean square (RMS) of local vibration response close to the combustion top dead center (TDC). These key findings provides insight understandings for not only biodiesel combustion diagnostics but also more accurate diagnostics of fossil diesel based on nonintrusive vibrations. View Full-Text
Keywords: finite element; vibrational response; piston slap; combustion shock; biodiesel finite element; vibrational response; piston slap; combustion shock; biodiesel
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Li, G.; Gu, F.; Wang, T.; You, J.; Ball, A. Investigation into the Vibrational Responses of Cylinder Liners in an IC Engine Fueled with Biodiesel. Appl. Sci. 2017, 7, 717.

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