Developing Small Variable Compression Ratio Engines for Teaching Purposes in an Undergraduate Program

2019-01-0331

04/02/2019

Event
WCX SAE World Congress Experience
Authors Abstract
Content
The purpose of this paper is to summarize the progress achieved by the Combustion Engine Laboratory at Technological University of Pereira in the practical implementation of variable compression methods adaptable to small single cylinder industrial engines. Three alternatives to vary the compression ratio have been studied and realized: the first one consists on the modification of the combustion chamber of a commercial diesel engine and its conversion to a dual ignition engine (spark and compression ignition); the second alternative involves the change of the base slider-crank mechanism of a Petter PJ1 engine by a multi-link mechanism controlled to change the piston stroke as well as the compression ratio; and the third alternative consists on the complete design and construction of a novel eccentric cam-based mechanism, developed to vary the TDC piston position, by modifying the distance between the crankshaft and the cylinder head in a custom-built developed engine. The main goal of the project was to recognize and assess the possibility and means of modifying, adapting and building low cost variable compression ratio research engine units, for teaching purposes in Mechanical Technology program. To achieve this goal many design, technological, and experimental tasks were accomplished. The paper provides an overview of the VCR mechanisms developed.
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DOI
https://doi.org/10.4271/2019-01-0331
Pages
15
Citation
Romero, C., and Henao Castañeda, E., "Developing Small Variable Compression Ratio Engines for Teaching Purposes in an Undergraduate Program," SAE Technical Paper 2019-01-0331, 2019, https://doi.org/10.4271/2019-01-0331.
Additional Details
Publisher
Published
Apr 2, 2019
Product Code
2019-01-0331
Content Type
Technical Paper
Language
English