Results 161 to 170 of about 34,342 (213)

A review of free-piston linear engines

Applied Energy, 2016
Abstract Unlike conventional internal combustion engines, a free-piston linear engine has no a crankshaft, and thus the pistons move freely in the cylinder. This allows a free-piston linear engine to easily adjust the compression ratio and optimize the combustion process.
Nguyen Ba Hung, Ocktaeck Lim
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Precise piston trajectory control for a free piston engine

Control Engineering Practice, 2015
Abstract A free piston engine removes the mechanical constraint on the piston motion by eliminating the crankshaft. The extra degree of freedom offers many advantages for reducing fuel consumption and emissions. Nevertheless, stability and robustness of the engine operation has been affected in the meantime.
Ke Li, Chen Zhang, Zongxuan Sun
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THE AUTOMOTIVE FREE-PISTON-TURBINE ENGINE

SAE Technical Paper Series, 1957
<div class="section abstract"><div class="htmlview paragraph">THIS paper discusses the free-piston engine which is being investigated by Ford.</div><div class="htmlview paragraph">The analytic method for calculating free-piston-gasifier thermodynamic performance over the complete operating range is discussed for the given ...
Donald N. Frey, Paul Klotsch, Adolph Egli   +2 more
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Dynamic Behaviour Prediction Of Free-piston Stirling Engines

Proceedings of the 25th Intersociety Energy Conversion Engineering Conference, 2005
The paper presents an integrated methodology for both the design optimization and the performance evaluation of free-piston Stirling engines (FPSE) suitable for space applications. In particular, the prediction of the dynamic behaviour is the problem here considered in more detail.
BENVENUTO G, DE MONTE, FILIPPO, FARINA F.   +2 more
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Dynamic Analysis of the Single Piston Hydraulic Free Piston Engine

Applied Mechanics and Materials, 2011
The connection of the engine body and the base was simplified as a spring and a damper to analyze the body vibration of the single piston hydraulic free piston engine. It was demonstrated that the increasing of the connection spring rate can reduce the amplitude of the body vibration.
Hao Ling Ren, Hai Bo Xie, Hua Yong Yang
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Large Free-Piston Stirling Engines

1985
The word ‘large’ applied to Stirling engines means different things to different people. An engine having a 3 kW output would be large to those working on artificial hearts or cryocoolers for electronic applications. It would be small, negligibly so, to those interested in locomotive propulsion.
Graham Walker, J. R. Senft
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Design approach for single piston hydraulic free piston diesel engines

Frontiers of Mechanical Engineering in China, 2009
The operating characteristics of a single piston hydraulic free piston diesel engine differ significantly from conventional diesel engines and this provides a theoretical basis for controlling and optimizing the design of the engine. The design of the proposed engine intended as a power supply for a hydraulic propulsion vehicle is presented.
Wei Wu, Shihua Yuan, Jibin Hu, Chongbo Jing   +3 more
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Constraint enforcement of piston motion in a free-piston engine

2014 American Control Conference, 2014
Precise control of piston turnaround location is essential for reliable free-piston engine (FPE) operation. In this paper we derive a discrete-time, control-oriented, implicit model that describes FPE clearance height behavior by applying an energy balance to the Otto cycle.
Kevin Zaseck, Matthew Brusstar, Ilya Kolmanovsky   +2 more
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Tribological characteristics of piston rings in a single-piston hydraulic free-piston engine

Industrial Lubrication and Tribology, 2017
Purpose A free-piston engine (FPE) is an unconventional engine that abandons the crank system. This paper aims to focus on a numerical simulation for the lubricating characteristics of piston rings in a single-piston hydraulic free-piston engine (HFPE).
Zhaoju Qin, Chenheng Yuan, Yanpeng Yuan, Yuanyuan Huang   +3 more
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FORD FREE-PISTON ENGINE DEVELOPMENT

SAE Technical Paper Series, 1959
<div class="section abstract"><div class="htmlview paragraph">THE Free-Piston Engine Program described in this paper was concerned with determining thermodynamic relationships of small, high-speed engines. The purpose was to establish proper engine geometry and mechanical design which could then be applied to developing larger automotive ...
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