Results 261 to 270 of about 5,004,714 (344)

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 V. Kolmanovsky   +2 more
openaire   +1 more source

Analysis and prediction of the performance of free- piston Stirling engine using response surface methodology and artificial neural network

Applied Thermal Engineering, 2021
Free piston Stirling engine is a popular area of research in high-efficiency thermal power conversion technology. However, owing to its strong coupling, nonlinearity, and parameter interactions, building an effective model to predict the performance is ...
Wenlian Ye, Xiaojun Wang, Yingwen Liu, Jun Chen   +3 more
semanticscholar   +1 more source

Comprehensive Design Method and Experimental Examination of an Electrical Machine for a Free-Piston Linear Generator

IEEE transactions on industrial electronics (1982. Print), 2022
This article describes the design method for an electrical machine for a free-piston linear generator. As with other applications for linear machines, defining a steady-state operating point as the basis for the design proved infeasible.
Sebastian Benecke, A. Gerlach, R. Leidhold   +2 more
semanticscholar   +1 more source

A two-stage free-piston driver

Shock Waves, 1999
The overall cost of free-piston driven facilities can be substantially reduced if the contraction between the compression and shock tubes is replaced with a constant area section. However, with such an implementation, a new driver concept is required in order to achieve a realistic facility length. This paper describes a new free-piston driver type for
Doolan, C. J., Morgan, R. G.
openaire   +4 more sources

On the Piston Motion of a Free-Piston Shock Tube

Aeronautical Quarterly, 1965
SummaryThe motion of a solid piston between the driver and test gases in a closed shock tube is studied. In particular, the piston stopping distance, i.e. the total length required to bring the piston to a stop, is calculated for various experimental conditions. Before the stop, the moving piston compresses the test gas, at first with its induced shock
Tzy C. Peng, Theo. F. Elbert
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

Hybrid simulation of a free piston engine

Proceedings of the April 26-28, 1966, Spring joint computer conference on XX - AFIPS '66 (Spring), 1966
The free piston engine principle is one which has intrigued mechanical engineers for decades. Indeed, the original gas engine of Otto and Langden employed a piston assembly which did not contain the now conventional connecting rod and camshaft arrangement and hence may be considered as an early implementation of the free piston principle.
R. E. Gagne, E. J. Wright
openaire   +1 more source

Effect of aspect ratio on the performance characteristics of free piston linear generator engine fueled by hydrogen

International journal of hydrogen energy, 2021
Free-piston linear generator (FPLG) engines currently gained great attention due to their capability to operate with variable fuel and compression ratio.
E. Zainal A., S. Mohammed, A. A. Aziz, M. Baharom, Aiman Jaffry, Firmansyah, A. Shahrul A, M. Ismael   +7 more
semanticscholar   +1 more source

Investigation of the optimum operating condition of a dual piston type free piston engine generator during engine cold start-up process

, 2021
The free-piston engine generator (FPEG) is a new type of energy conversion device that converts chemical energy of fossil fuel into electric energy and eliminates the limitation of crankshaft mechanism, and can be applied to range extenders in electric ...
H. Feng, Zhiyuan Zhang, Boru Jia, Zhengxing Zuo, A. Smallbone, A. Roskilly   +5 more
semanticscholar   +1 more source