Ignition Delay Correlation for Engine Operating with Lean and with Rich Fuel-Air Mixtures
Name
2016-01-0699 ign delay correl.pdf
Size
520.38 KB
Format
Adobe PDF
Checksum (MD5)
472814b4a5c85debdf4e314f7f89476b
Author(s)
McKenzie, Jacob Elijah
Cheng, Wai K
Date Issued
April 2016
Journal
SAE Technical Papers
Publisher
SAE International
Citation
McKenzie, Jacob, and Wai K. Cheng. “Ignition Delay Correlation for Engine Operating with Lean and with Rich Fuel-Air Mixtures.” N.p., 2016.
Version
Author's final manuscript
Abstract
An ignition delay correlation encompassing the effects of temperature, pressure, residual gas, EGR, and lambda (on both the rich and lean sides) has been developed. The procedure uses the individual knocking cycle data from a boosted direct injection SI engine (GM LNF) operating at 1250 to 2000 rpm, 8-14 bar GIMEP, EGR of 0 to 12.5%, and lambda of 0.8 to 1.3 with a certification fuel (Haltermann 437, with RON=96.6 and MON=88.5). An algorithm has been devised to identify the knock point on individual pressure traces so that the large data set (of some thirty three thousand cycles) could be processed automatically. For lean and for rich operations, the role of the excess fuel, air, and recycled gas (which has excess air in the lean case, and hydrogen and carbon monoxide in the rich case) may be treated effectively as diluents in the ignition delay expression.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.4271/2016-01-0699
