You are not logged in.

Combustion simulations for a self controlling variable compression ratio connecting rod

Will, Frank Stefan and Mayson, Dylan 2012, Combustion simulations for a self controlling variable compression ratio connecting rod, in SAE 2012 : Technical papers from the 2012 SAE World Congress and Exhibition, SAE, Detroit, Michigan, doi: 10.4271/2012-01-1154.

Attached Files
Name Description MIMEType Size Downloads

Title Combustion simulations for a self controlling variable compression ratio connecting rod
Author(s) Will, Frank Stefan
Mayson, Dylan
Conference name SAE World Congress and Exhibition (2012 : Detroit, Mich.)
Conference location Detroit, Mich.
Conference dates 24-26 Apr. 2012
Title of proceedings SAE 2012 : Technical papers from the 2012 SAE World Congress and Exhibition
Editor(s) [Unknown]
Publication date 2012
Conference series SAE World Congress and Exhibition
Total pages 13
Publisher SAE
Place of publication Detroit, Michigan
Summary Variable compression ratio enables an engine to achieve increased efficiency at part loads, where the majority of driving occurs, without sacrificing full load power requirements or increasing the risk of engine knock. Although over 100 patents and patent applications exist none of these systems has been commercialized yet due to issues related to feasibility, cost and frictional loss. A new approach of a self controlling variable compression ratio connecting rod is presented that does not need a friction intensive external activation and that could even be retrofitted. The potential in fuel consumption and exhaust emission reduction as well as increased power and torque output for this concept has been verified in combustion simulations utilizing the latest research results related to the dynamic heat transfer in the combustion chamber from Professor Kleinschmidt from the University of Siegen, Germany. The self controlling variable compression ratio connecting rod allows the con rod to compress at high load conditions thereby increasing cylinder volume to alleviate combustion pressures and temperatures and therefore limit knock onset. The biggest efficiency gains can be achieved at medium load where the reduction of heat loss during the compression of the connecting rod plays a major role additional to the well known efficiency gains of an increased compression ratio. The combustion simulation results shows fuel consumption can be reduced by between 3% and 5% during part load and wide open throttle operation at various engine speeds. Emissions are also reduced significantly; particularly NOx and CO emissions were reduced by up to 35%.The self controlling variable compression ratio connecting rod allows the con rod to compress at high load conditions thereby increasing cylinder volume to alleviate combustion pressures and temperatures and therefore limit knock onset. The biggest efficiency gains can be achieved at medium load where the reduction of heat loss during the compression of the connecting rod plays a major role additional to the well known efficiency gains of an increased compression ratio.The combustion simulation results shows fuel consumption can be reduced by between 3% and 5% during part load and wide open throttle operation at various engine speeds. Emissions are also reduced significantly; particularly NOx and CO emissions were reduced by up to 35%.
ISSN 0148-7191
Language eng
DOI 10.4271/2012-01-1154
Field of Research 090201 Automotive Combustion and Fuel Engineering (incl Alternative/Renewable Fuels)
Socio Economic Objective 850702 Energy Conservation and Efficiency in Transport
HERDC Research category E1 Full written paper - refereed
Copyright notice ©2012, SAE International
Persistent URL http://hdl.handle.net/10536/DRO/DU:30049221

Document type: Conference Paper
Collection: School of Engineering
Connect to link resolver
 
Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved.

Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 0 times in TR Web of Science
Scopus Citation Count Cited 1 times in Scopus
Google Scholar Search Google Scholar
Access Statistics: 194 Abstract Views, 42 File Downloads  -  Detailed Statistics
Created: Thu, 01 Nov 2012, 13:11:35 EST

Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.