NDLI: A Comparative Study of Permanent Magnet Linear Alternator and Hydraulic Free-Piston Engines

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Sadighi, Ali Li, Ke Sun, Zongxuan
Copyright Year	2011
Abstract	This paper presents a comparative study of two possible power-generating units for the free-piston engine (FPE): Permanent-magnet linear alternator (PMLA) and linear hydraulic pump. The FPE discussed in this paper is a linear, opposed-piston, opposed-cylinder (OPOC) engine that operates with a homogenous charge compression ignition (HCCI) combustion. Lack of crankshaft in the FPE allows lower friction loss, variable compression ratio, and higher modularity compared to a conventional engine. Also the OPOC configuration enables high-frequency operation of the FPE, which results in high power density. The FPE is also well suited for HCCI operation, which offers improved fuel efficiency and emissions. The chemical power released in the combustion chambers can be transformed to fluid or electric power. This could be done via a hydraulic pump or a linear alternator. In this paper these two systems are studied and compared as the power-generating device for the FPE.
Sponsorship	Dynamic Systems and Control Division
Starting Page	137
Ending Page	144
Page Count	8
File Format	PDF
ISBN	9780791854754
DOI	10.1115/DSCC2011-6041
Volume Number	ASME 2011 Dynamic Systems and Control Conference and Bath/ASME Symposium on Fluid Power and Motion Control, Volume 1
Conference Proceedings	ASME 2011 Dynamic Systems and Control Conference and Bath/ASME Symposium on Fluid Power and Motion Control
Language	English
Publisher Date	2011-10-31
Publisher Place	Arlington, Virginia, USA
Access Restriction	Subscribed
Subject Keyword	Power density Compression Ignition Permanent magnets Combustion Homogeneous charge compression ignition engines Engines Electricity (physics) Emissions Pistons Hydraulic pumps Fluids Fuel efficiency Friction Combustion chambers Cylinders
Content Type	Text
Resource Type	Article

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