scholarly journals HC1-1: Numerical Analyses of the Effects of Mixture Quality on the Controlled Autoignition in Gasoline Engines(HC: HCCI Combustion,General Session Papers)

2008 ◽  
Vol 2008.7 (0) ◽  
pp. 259-266 ◽  
Author(s):  
Sebastian Hensel ◽  
Werner Sauter ◽  
Fatih Sarikoc ◽  
Heiko Kubach ◽  
Ulrich Spicher ◽  
...  
Keyword(s):  
Numerical Analyses ◽  
General Session ◽  
Gasoline Engines ◽  
Hcci Combustion ◽  
Controlled Autoignition

Modeling Cyclic Variability in Spark-Assisted HCCI

2008 ◽  
Vol 130 (5) ◽  
Author(s):  
C. Stuart Daw ◽  
K. Dean Edwards ◽  
Robert M. Wagner ◽  
Johney B. Green
Keyword(s):  
Control Strategies ◽  
Experimental Studies ◽  
Mode Switching ◽  
Load Range ◽  
Gasoline Engines ◽  
Cyclic Variability ◽  
Hcci Combustion ◽  
Quantitative Understanding ◽  
Low Dimensional ◽  
High Degree

Spark assist appears to offer considerable potential for increasing the speed and load range over which homogeneous charge compression ignition (HCCI) is possible in gasoline engines. Numerous experimental studies of the transition between conventional spark-ignited (SI) propagating-flame combustion and HCCI combustion in gasoline engines with spark assist have demonstrated a high degree of deterministic coupling between successive combustion events. Analysis of this coupling suggests that the transition between SI and HCCI can be described as a sequence of bifurcations in a low-dimensional dynamic map. In this paper, we describe methods for utilizing the deterministic relationship between cycles to extract global kinetic rate parameters that can be used to discriminate multiple distinct combustion states and develop a more quantitative understanding of the SI-HCCI transition. We demonstrate the application of these methods for indolene-containing fuels and point out an apparent HCCI mode switching not previously reported. Our results have specific implications for developing dynamic combustion models and feedback control strategies that utilize spark assist to expand the operating range of HCCI combustion.

Sign in / Sign up

Export Citation Format

Share Document