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Development of a spark ignition free-piston engine generator

A dual-piston type two-stroke spark-ignition free-piston engine generator prototype has been developed. A comprehensive review on recent published researches and patent documents from academia and industrial organisations on free-piston engine generator, especially on the applications for series hyb...

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Main Author: Mohd Razali, Hanipah
Format: Thesis
Language:English
Published: 2015
Subjects:
T Technology (General)
TJ Mechanical engineering and machinery
Online Access:http://umpir.ump.edu.my/id/eprint/13556/16/Development%20nf%20%27%20cn9rk%20i%27nition%20free-niston%20engine.pdf
http://umpir.ump.edu.my/id/eprint/13556/
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spelling my.ump.umpir.135562021-11-17T03:05:56Z http://umpir.ump.edu.my/id/eprint/13556/ Development of a spark ignition free-piston engine generator Mohd Razali, Hanipah T Technology (General) TJ Mechanical engineering and machinery A dual-piston type two-stroke spark-ignition free-piston engine generator prototype has been developed. A comprehensive review on recent published researches and patent documents from academia and industrial organisations on free-piston engine generator, especially on the applications for series hybrid electric vehicles, was conducted. Relevant parameters affecting the operating performance and a number of challenges had been identifiedas the common denominator for this technology. Modelling and simulations using one-dimensional tools were conducted in parallel with the development activities. Three main simulation models for the crankshaft engines were developed, validated and optimised before converted into the free-piston engine model. This was done by using imposed-piston motion sub-model. The two-stroke free-piston engine model had undergone parametric study for valve timing optimisation. This model was validated by using motoring experimental results using the developed freepiston engine generator prototype. From the experimental results, the free-piston engine generator motoring performance was able -to meet the targeted cyclic speed and compression pressure for starting. However, the free-piston engine generator operating speed was limited to 5Hz and below due to valve delay inherent in the pneumatic actuators. The motoring results were used to validate the free-piston engine model which showed a good agreement at various starting speeds. Finally, performance and parametric investigations were conducted using the final validated and refined freepiston engine model. From the simulation, it was found that the free-piston engine had similar response to air-fuel ratio and ignition position variations compare to crankshaft engine with the free-piston engine performance was slightly reduced. Further, the reduced frictional losses contributed little to its performance gain. However, the high influence of piston motion around TDC on the engine performance, observed in freepiston engine, could be manipulated to increase its performance significantly. 2015-06 Thesis NonPeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/13556/16/Development%20nf%20%27%20cn9rk%20i%27nition%20free-niston%20engine.pdf Mohd Razali, Hanipah (2015) Development of a spark ignition free-piston engine generator. PhD thesis, Newcastle University.
institution Universiti Malaysia Pahang
building UMP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Pahang
content_source UMP Institutional Repository
url_provider http://umpir.ump.edu.my/
language English
topic T Technology (General)
TJ Mechanical engineering and machinery
spellingShingle T Technology (General)
TJ Mechanical engineering and machinery
Mohd Razali, Hanipah
Development of a spark ignition free-piston engine generator
description A dual-piston type two-stroke spark-ignition free-piston engine generator prototype has been developed. A comprehensive review on recent published researches and patent documents from academia and industrial organisations on free-piston engine generator, especially on the applications for series hybrid electric vehicles, was conducted. Relevant parameters affecting the operating performance and a number of challenges had been identifiedas the common denominator for this technology. Modelling and simulations using one-dimensional tools were conducted in parallel with the development activities. Three main simulation models for the crankshaft engines were developed, validated and optimised before converted into the free-piston engine model. This was done by using imposed-piston motion sub-model. The two-stroke free-piston engine model had undergone parametric study for valve timing optimisation. This model was validated by using motoring experimental results using the developed freepiston engine generator prototype. From the experimental results, the free-piston engine generator motoring performance was able -to meet the targeted cyclic speed and compression pressure for starting. However, the free-piston engine generator operating speed was limited to 5Hz and below due to valve delay inherent in the pneumatic actuators. The motoring results were used to validate the free-piston engine model which showed a good agreement at various starting speeds. Finally, performance and parametric investigations were conducted using the final validated and refined freepiston engine model. From the simulation, it was found that the free-piston engine had similar response to air-fuel ratio and ignition position variations compare to crankshaft engine with the free-piston engine performance was slightly reduced. Further, the reduced frictional losses contributed little to its performance gain. However, the high influence of piston motion around TDC on the engine performance, observed in freepiston engine, could be manipulated to increase its performance significantly.
format Thesis
author Mohd Razali, Hanipah
author_facet Mohd Razali, Hanipah
author_sort Mohd Razali, Hanipah
title Development of a spark ignition free-piston engine generator
title_short Development of a spark ignition free-piston engine generator
title_full Development of a spark ignition free-piston engine generator
title_fullStr Development of a spark ignition free-piston engine generator
title_full_unstemmed Development of a spark ignition free-piston engine generator
title_sort development of a spark ignition free-piston engine generator
publishDate 2015
url http://umpir.ump.edu.my/id/eprint/13556/16/Development%20nf%20%27%20cn9rk%20i%27nition%20free-niston%20engine.pdf
http://umpir.ump.edu.my/id/eprint/13556/
_version_ 1717093616733650944
score 13.211869

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