DocumentCode :
728559
Title :
Control-oriented modeling of spark assisted compression ignition using a double Wiebe function
Author :
Zheng Qu ; Ravi, Nikhil ; Oudart, Joel ; Doran, Eric ; Mittal, Varun ; Kojic, Aleksandar
Author_Institution :
Massachusetts Inst. of Technol., Cambridge, MA, USA
fYear :
2015
fDate :
1-3 July 2015
Firstpage :
4741
Lastpage :
4746
Abstract :
Spark assisted compression ignition (SACI) is currently under exploration as a combustion strategy to extend the operating range of homogeneous charge compression ignition (HCCI), which provides efficiency benefits over standard spark ignition (SI) combustion. This paper presents a physics-based control-oriented approach to modeling combustion in SACI. A double-Wiebe function is developed to capture the two-stage energy release seen in SACI, where a portion of the fuel is burned through flame propagation initiated by a spark, which then initiates auto-ignition in the remaining fuel. This double-Wiebe function is incorporated into a previously developed continuous-time model of HCCI combustion, and correlations for the Wiebe function parameters are developed based on physical model states. A simpler cycle-by-cycle HCCI model is also extended with a two-step energy release description for SACI combustion. Both models accurately capture the behavior of SACI and its sensitivity to different actuators when compared to experimental data.
Keywords :
automobiles; combustion; flames; ignition; internal combustion engines; sparks; HCCI combustion; SACI combustion; SI combustion; Wiebe function parameters; auto-ignition; automobiles; combustion modeling; combustion strategy; continuous-time model; control-oriented modeling; cycle-by-cycle HCCI model; double Wiebe function; flame propagation; fuel burn; homogeneous charge compression ignition; physical model states; physics-based control-oriented approach; spark assisted compression ignition; spark ignition combustion; two-stage energy release; two-step energy release description; Brain modeling; Combustion; Data models; Design automation; Fuels; Solid modeling; System-on-chip;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
American Control Conference (ACC), 2015
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-4799-8685-9
Type :
conf
DOI :
10.1109/ACC.2015.7172076
Filename :
7172076
Link To Document :
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