The design of a prototype Otto-Atkinson engine and evaluation of the part load fuel efficiency

 

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dc.contributor.advisor Yates, Andrew en_ZA
dc.contributor.author Van Binsbergen, Peter J en_ZA
dc.date.accessioned 2016-02-29T12:03:34Z
dc.date.available 2016-02-29T12:03:34Z
dc.date.issued 1992 en_ZA
dc.identifier.citation Van Binsbergen, P. 1992. The design of a prototype Otto-Atkinson engine and evaluation of the part load fuel efficiency. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/17351
dc.description Bibliography: page 71. en_ZA
dc.description.abstract This thesis is an investigation into the application of the hybrid Otto-Atkinson cycle, as a means of improving the part load fuel efficiency of spark-ignition engines. The primary objective of this thesis was to investigate the technical feasibility of the modified Atkinson cycle as a spark-ignition engine concept and thus to quantify the associated potential for greater fuel efficiency. The modified Atkinson cycle is a hybrid cycle which approximates the Otto cycle at full load but tends to emulate the Atkinson cycle at part load, and therefore it is referred to as the Otto-Atkinson cycle. In order to fulfil this objective, a single cylinder engine which operated on the Otto-Atkinson cycle, was designed and constructed. This unusual cycle was achieved by a crank linkage which allowed the power output to be controlled by varying the inlet and compression strokes rather than by the more conventional method of throttling the induced fuel-air mixture. Thus the pumping losses associated with throttled part-load operation are eliminated. Furthermore, the expansion stroke is always greater than the compression stroke, the difference being greatest at part loads. This results in a cycle which approximates the Atkinson cycle for part-load operation. A simplified thermodynamic simulation of the cycle was formulated. Theoretical predictions were made based on this simulation. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Mechanical Engineering en_ZA
dc.title The design of a prototype Otto-Atkinson engine and evaluation of the part load fuel efficiency en_ZA
dc.type Master Thesis
uct.type.publication Research en_ZA
uct.type.resource Thesis en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Engineering and the Built Environment
dc.publisher.department Department of Mechanical Engineering en_ZA
dc.type.qualificationlevel Masters
dc.type.qualificationname MSc (Eng) en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Van Binsbergen, P. J. (1992). <i>The design of a prototype Otto-Atkinson engine and evaluation of the part load fuel efficiency</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering. Retrieved from http://hdl.handle.net/11427/17351 en_ZA
dc.identifier.chicagocitation Van Binsbergen, Peter J. <i>"The design of a prototype Otto-Atkinson engine and evaluation of the part load fuel efficiency."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering, 1992. http://hdl.handle.net/11427/17351 en_ZA
dc.identifier.vancouvercitation Van Binsbergen PJ. The design of a prototype Otto-Atkinson engine and evaluation of the part load fuel efficiency. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering, 1992 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/17351 en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Van Binsbergen, Peter J AB - This thesis is an investigation into the application of the hybrid Otto-Atkinson cycle, as a means of improving the part load fuel efficiency of spark-ignition engines. The primary objective of this thesis was to investigate the technical feasibility of the modified Atkinson cycle as a spark-ignition engine concept and thus to quantify the associated potential for greater fuel efficiency. The modified Atkinson cycle is a hybrid cycle which approximates the Otto cycle at full load but tends to emulate the Atkinson cycle at part load, and therefore it is referred to as the Otto-Atkinson cycle. In order to fulfil this objective, a single cylinder engine which operated on the Otto-Atkinson cycle, was designed and constructed. This unusual cycle was achieved by a crank linkage which allowed the power output to be controlled by varying the inlet and compression strokes rather than by the more conventional method of throttling the induced fuel-air mixture. Thus the pumping losses associated with throttled part-load operation are eliminated. Furthermore, the expansion stroke is always greater than the compression stroke, the difference being greatest at part loads. This results in a cycle which approximates the Atkinson cycle for part-load operation. A simplified thermodynamic simulation of the cycle was formulated. Theoretical predictions were made based on this simulation. DA - 1992 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1992 T1 - The design of a prototype Otto-Atkinson engine and evaluation of the part load fuel efficiency TI - The design of a prototype Otto-Atkinson engine and evaluation of the part load fuel efficiency UR - http://hdl.handle.net/11427/17351 ER - en_ZA


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