This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Experimental Investigation of Internal Exhaust Gas Recirculation on a Variable Valve Actuation Spark Ignition Engine Operating with Gasoline and Ethanol
Technical Paper
2016-36-0399
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Exhaust Gas Recirculation - EGR - is a well-known technique to reduce NOx and it’s been applied on Diesel engines for a long time. Later studies and application found that other benefits can be achieved with PFI and GDI gasoline engines, such as pumping loss minimization and efficient knock control. Variable valve actuation valve-trains brought broader application possibilities as it enables full internal EGR control without external paths, high precision and response, as required on transient work modes. Comprehensive investigation on PFI and GDI Spark Ignition engines with external Hot EGR and Cooled EGR are widely available. However, variable valve actuation EGR control review on a flexfuel application is not well explored, and this paper is aimed at doing such. This work involves investigating the effects of internal exhaust gas recirculation - IEGR - on the combustion, fuel economy and emissions of a variable valve actuation engine (FCA Multiair II) operating with gasoline and ethanol in a part-load condition. This technology allows to control and anticipate the intake valve opening angle in a wide range, increasing the overlap angle and consequently the IEGR flow, that is the amount of burned gas mass that has flowed from the cylinder across the intake valve into the intake runner during the exhaust phase. There are three main ways in which IEGR could benefit fuel economy in a Multiair system: reduced throttle losses, reduced valve losses, and increased thermal efficiency. However, EGR can also be detrimental to combustion stability and velocities, so a balance must be established, which requires precise control over the EGR content. It’s interesting to know that variable valve actuation offers a great fuel economy potential at moderate loads and the ability to meet future engine fuel consumption targets.
Authors
- Heder Fernandes - FCA - Fiat Chrysler Automobiles
- Charles Quirino Pimenta - FCA - Fiat Chrysler Automobiles
- Wanderson Navegantes Rodrigues - FCA - Fiat Chrysler Automobiles
- Raphael Bezerra de Souza Montemor - FEV América Latina
- José Eduardo Mautone Barros - UFMG - Universidade Federal de Minas Gerais
Topic
Citation
Fernandes, H., Pimenta, C., Rodrigues, W., de Souza Montemor, R. et al., "Experimental Investigation of Internal Exhaust Gas Recirculation on a Variable Valve Actuation Spark Ignition Engine Operating with Gasoline and Ethanol," SAE Technical Paper 2016-36-0399, 2016, https://doi.org/10.4271/2016-36-0399.Also In
References
- Heywood , John B. Internal Combustion Engine Fundamentals 1 New York McGraw-Hill, Inc. 1988 930
- Obert , E. F. Motores de Combustão Interna Porto Alegre Ed. Globo 1971 618
- Taylor , C. F. Análise dos Motores de Combustão Interna 1 São Paulo Edgard Blücher 1968 558
- Cairs , A. , Zhao , H. , Todd , A. , and Aleiferis , P. A Study of Mechanical Variable Valve Operation with Gasoline-Alcohol Fuels in a Spark Ignition Engine Elsevier 106 2013 802 813 2012
- Wei , H. , Zhu , T. , Shu , G. et al. Gasoline Engine Exhaust Gas Recirculation - A Review Elsevier 99 2012 534 544 2012
- Abd-Alla , G. Using Exhaust Gas Recirculation in Internal Combustion Engines: A Review Elsevier Energy Conversion and Management 43 2002 1027 1042 2001
- Königstein A , Larsson P-I , Grebe UD and Wu K-J. Differentiated analysis of downsizing concepts MTZ Worldwide Ed 2008 69 06
- Marelli S and Capobianco M. Steady and pulsating flow efficiency of a waste-gated turbocharger radial flow turbine for automotive application Energy 2010 36 1 459 65 10.1016/j.energy.2010.10.019
- Rahnejat , H. , Balakrishnan , S. , King , P D. and Howell-Smith , S. In-Cylinder Friction Reduction Using a Surface Finish Optimization Technique Journal of Automobile Engineering September 1 2006 220 1309 1318
- Cheolwoong P. , Sungdae K. , Hongsuk K. and Yasuo M. Stratified lean combustion characteristics of a spray-guided combustion system in a gasoline direct injection engine Energy 2012 41 1 401 407 10.1016/j.energy.2012.02.060
- Adomeit , P. , Jakob , M. , Pischinger , S. , Brunn , A. et al. Effect of Intake Port Design on the Flow Field Stability of a Gasoline DI Engine SAE Technical Paper 2011-01-1284 2011 10.4271/2011-01-1284
- Blank Helmut , Dismon Heinrich , Kochs Michael W , Sanders Michael EGR and Air Management for Direct Injection Gasoline Engines SAE paper 2002-01-0707 2002