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FREE-PISTON ENGINE-AND-HYDRAULIC PUMP
, 2013 Сегодня увеличивается количество техники с широким внедрением гидравлики во всех отраслях машиностроения. Исходя из государственных программ создания более экономических и менее металлоемких машин, появилась возможность и необходимость в создании нового типа мобильных машин c беcступенчатой гидравлической трансмиссией.
Головчук, Андрій Федорович
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Hybrid simulation of a free piston engine
Proceedings of the April 26-28, 1966, Spring joint computer conference on XX - AFIPS '66 (Spring), 1966The 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
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Motion control of a hydraulic free-piston engine
2012 American Control Conference (ACC), 2012Free-piston engine (FPE), as an alternative of the conventional internal combustion engine, has a high potential in terms of energy saving given its wide range of potential applications and high efficiency. One of the technical barriers that prevents the wide spread of this technology is the lack of precise piston motion control.
Ke Li, Ali Sadighi, Zongxuan Sun
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Hydraulic free piston engine — Challenge for control
1999 European Control Conference (ECC), 1999A hydraulic free piston engine, HFPE, combines a diesel engine and a hydraulic pump into one compact component. In practical view there is only one linearly moving part in the HFPE, the piston assembly, which contains combustion and hydraulic pistons and piston rod.
Researcher Seppo Tikkanen +1 more
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Design of a Free-Piston Engine-Pump
SAE Technical Paper Series, 1992<div class="htmlview paragraph">Off-highway mining and construction equipment typically converts all the power output of the engine to hydraulic power, with this power then used to perform the earth-moving operations, and also to propel the vehicle. This equipment presents significant opportunities for a new type of powerplant designed to deliver
Norman H. Beachley, Frank J. Fronczak
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A review of free-piston linear engines
Applied Energy, 2016Abstract 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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Piston Ring Friction Losses in a Free Piston Engine with Variable Frequency
SAE International Journal of Engines, 2021<div>Free piston linear engines (FPLE) directly convert the piston reciprocating motion into electricity using an integrated linear alternator. Unlike conventional crankshaft engines, the FPLE’s motion is variable and is not restricted between the predefined or fixed dead centers.
Mehar Bade +3 more
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Friction characteristics of piston rings in a free-piston engine generator
International Journal of Engine Research, 2016Free-piston engine generator is a new alternative to traditional reciprocating engine, which moves without mechanical restriction of crankshaft system. This article investigated numerically the friction characteristics of piston rings in a free-piston diesel engine generator by adopting coupled models of dynamic and friction.
Chenheng Yuan +3 more
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Stability, Control, and Constraint Enforcement of Piston Motion in a Hydraulic Free-Piston Engine
IEEE Transactions on Control Systems Technology, 2017A free-piston engine (FPE) requires stabilizing feedback control to manage piston motion and ensure safe operation. A high-fidelity model, which simulates the FPE behavior by combining dynamic, thermodynamic, and hydraulic submodels, is exploited as an engine surrogate for control development.
Kevin Zaseck +2 more
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A Review of Free Piston Engine Concepts
SAE Technical Paper Series, 1994<div class="htmlview paragraph">In free piston engines, the stroke of the piston is used directly to produce hydraulic, pneumatic or electric energy. This can be done with a single piston in one combustion chamber, or with more pistons in one or more combustion chambers.
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