This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Direct In-cylinder CO2 Measurements of Residual Gas in a GDI Engine for Model Validation and HCCI Combustion Development
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 08, 2013 by SAE International in United States
Annotation ability available
An accurate prediction of residual burned gas within the combustion chamber is important to quantify for development of modern engines, especially so for those with internally recycled burned gases and HCCI operations. A wall-guided GDI engine has been fitted with an in-cylinder sampling probe attached to a fast response NDIR analyser to measure in-situ the cycle-by-cycle trapped residual gas. The results have been compared with a model which predicts the trapped residual gas fraction based on heat release rate calculated from the cylinder pressure data and other factors. The inlet and exhaust valve timings were varied to produce a range of Residual Gas Fraction (RGF) conditions and the results were compared between the actual measured CO2 values and those predicted by the model, which shows that the RGF value derived from the exhaust gas temperature and pressure measurement at EVC is consistently overestimated by 5% over those based on the CO2 concentrations. The implications for engines with internally recycled burned gases and HCCI combustion development were considered. It is shown that there is an optimum valve overlap period for a given operating condition that produces highest indicated thermal efficiency and optimised combustion phasing. In addition, the minimum residual gas concentration should be employed for the least pumping loss during the recompression process when the negative valve overlap method is used to achieve CAI/HCCI combustion for a given engine output.
CitationZhang, Y., Zhao, H., Peckham, M., and Campbell, B., "Direct In-cylinder CO2 Measurements of Residual Gas in a GDI Engine for Model Validation and HCCI Combustion Development," SAE Technical Paper 2013-01-1654, 2013, https://doi.org/10.4271/2013-01-1654.
- Zhao , F. , Asmus , T.N. , Assanis , D.N. , Dec , J.E. et al. Homogeneous Charge Compression Ignition (HCCI) Engines Society of Automotive Engineers, Inc. Warrendale, PA 978-0-7680-1123-4 2003 10.4271/PT-94
- Zhao H. HCCI and CAI engines for the Automotive Industry Woodhead Publishing Cambridge 2007
- Sutela , C. , Collings , N. , and Hands , T. Real Time CO2 Measurement to Determine Transient Intake Gas Composition under EGR Conditions SAE Technical Paper 2000-01-2953 2000 10.4271/2000-01-2953
- Peckham , M. , Campbell , B. W. and Finch , A. Measurement of the effects of EGR delay on the NOx emissions within a turbo-charged passenger car diesel engine Proceedings of the Institution of Mechanical Engineers, Part D, Journal of Automobile Engineering 225 9 September 2011 0945-4070
- Zhang , Y. , Zhao , H. , Ojapah , M. , and Cairns , A. Experiment and Analysis of a Direct Injection Gasoline Engine Operating with 2-stroke and 4-stroke Cycles of Spark Ignition and Controlled Auto-Ignition Combustion SAE Technical Paper 2011-01-1774 2011 10.4271/2011-01-1774
- Borgqvist , P. , Tunestål , P. , and Johansson , B. Investigation and Comparison of Residual Gas Enhanced HCCI using Trapping (NVO HCCI) or Rebreathing of Residual Gases SAE Technical Paper 2011-01-1772 2011 10.4271/2011-01-1772
- Zhao , H. , Li , J. , Ma , T. , and Ladommatos , N. Performance and Analysis of a 4-Stroke Multi-Cylinder Gasoline Engine with CAI Combustion SAE Technical Paper 2002-01-0420 2002 10.4271/2002-01-0420
- Sadakane , S. , Sugiyama , M. , Kishi , H. , Abe , S. et al. Development of a New V-6 High Performance Stoichiometric Gasoline Direct Injection Engine SAE Technical Paper 2005-01-1152 2005 10.4271/2005-01-1152
- Qin , J. , Xie , H. , Zhang , Y. , and Zhao , H. A Combustion Heat Release Correlation for CAI Combustion Simulation in 4-Stroke Gasoline Engines SAE Technical Paper 2005-01-0183 2005 10.4271/2005-01-0183
- Heywood John B. Internal Combustion Engine Fundamentals 1988 McGraw-Hill Book Company