Quasi-dimensional Analysis of Combustion, Emissions and Knocking in a Homogeneous GDI Engine

A quasi-dimensional model is developed with the surrogate mechanism of isooctane and n-heptane to predict knock and emissions of a homogeneous Gasoline Direct Injection (GDI) engine. It is composed of unburned and burned zone with the latter divided into multiple zones of equal mass to resolve temperature stratification. Combustion is based on turbulent entrainment and burning in a spherically propagating flame with the entrainment rate interpolated between laminar and turbulent flame speed. Validation is performed against measured pressure traces, nitrogen oxide (NOx) and carbon monoxide (CO) emissions at different load and rpm conditions. Comparison is made between predictions by the empirical knock model and the chemistry model in this work. There is good agreement for pressure, NOx, CO and knock for the test engine. Promising results are obtained through parametric study with respect to octane number and engine load by the chemistry knock model.

• Record URL:
  https://doi.org/10.1007/s12239-015-0089-z
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/12299138
• Supplemental Notes:
  • Copyright © 2015, The Korean Society of Automotive Engineers and Springer-Verlag Berlin Heidelberg.
• Authors:
  • Lee, J
  • Lee, Y
  • Huh, K Y
  • Kwon, H
  • Park, J I
• Publication Date: 2015-10

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 877-883
• Serial:
  • International Journal of Automotive Technology
  • Volume: 16
  • Issue Number: 5
  • Publisher: Korean Society of Automotive Engineers
  • ISSN: 1229-9138
  • EISSN: 1976-3832
  • Serial URL: http://link.springer.com/journal/12239

Subject/Index Terms

• TRT Terms: Burning rate; Carbon dioxide; Combustion; Engine knock; Gasoline engines; Nitrogen oxides; Pollutants
• Uncontrolled Terms: Gasoline direct injection
• Subject Areas: Environment; Highways; Vehicles and Equipment; I15: Environment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 01565494
• Record Type: Publication
• Files: TRIS
• Created Date: May 28 2015 4:46PM