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Title: Power loss investigation in an internal combustion engine piston equipped with a nonlinear energy absorber
Authors: Dolatabadi, Nader
Theodossiades, Stephanos
Rothberg, Steve
Keywords: Piston impact
Piston secondary motion
Targeted energy transfer
Nonlinear energy sink
Friction
Power loss
Issue Date: 2017
Publisher: © ASME
Citation: DOLATABADI, N., THEODOSSIADES, S. and ROTHBERG, S., 2017. Power loss investigation in an internal combustion engine piston equipped with a nonlinear energy absorber. Proceedings of the ASME 2017 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference (IDETC/CIE 2017), Cleveland, Ohio, USA, 6th-9th August 2017.
Abstract: The piston impacts against the cylinder liner are the most significant sources of mechanical noise in internal combustion engines. Conventionally, the severity of impacts is reduced through the modification of physical and geometrical characteristics of components in the piston assembly. These methods effectively reduce power losses at certain engine operating conditions. Moreover, the conditions leading to the reduction in power losses inversely increase the engine noise due to piston impacts. An alternative control method that is robust to fluctuations in engine operating conditions is anticipated to improve the engine’s NVH performance whilst exacerbation in power loss remains within the limits of the conventional methods. The concept of Targeted Energy Transfer (TET) through the use of Nonlinear Energy Sinks (NES) has not been applied yet in automotive powertrains. Numerical studies have shown a potential in reducing the severity of impact dynamics by controlling piston’s secondary motion. The power loss of a piston equipped with a nonlinear energy sink is investigated in this study.
Description: This conference paper is closed access.
Sponsor: The authors wish to express their gratitude to the EPSRC for the financial support extended to the Encyclopaedic Program Grant (EP/G012334/1), under which this research was carried out. Thanks are also due to the consortium of industrial partners of the Encyclopaedic project, particularly to Capricorn Automotive in this instance.
Version: Accepted for publication
URI: https://dspace.lboro.ac.uk/2134/25067
Publisher Link: http://proceedings.asmedigitalcollection.asme.org/conferenceproceedings.aspx
Appears in Collections:Closed Access (Mechanical, Electrical and Manufacturing Engineering)

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