A Control Oriented SI and HCCI Hybrid Combustion Model for Internal Combustion Engines

Yang, Xiaojing; Zhu, Guoming; Sun, Zongxuan

doi:10.1115/dscc2010-4042

Cited by 8 publications

(6 citation statements)

References 15 publications

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“…Comparing this graphical method to the control-oriented mixing model demonstrated that there was correlation between the results, however it also demonstrated that there are more complex processes that were not fully captured by the model. In the future, this CFD analysis will be integrated with the two-zone model as well as a combustion model [14]. The CFD and control-oriented models will then be used together with the experimental work from an optical engine to further develop and calibrate the models.…”

Section: Resultsmentioning

confidence: 99%

“…Since the charge mixture conditions at IVC are critical for the HCCI combustion, the future work is to integrate this charge mixing model with the hybrid HCCI combustion model, described in [14], to accurately model the hybrid HCCI combustion process using a multi-zone approach. The output of the Two-Zone mixing model will be sent to the hybrid combustion model, while the output of the combustion model becomes the input to the mixing model for next cycle.…”

Section: Future Workmentioning

confidence: 99%

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A Novel Method for CFD Analysis of a Two-Zone Mixing Model for HCCI Engines

McCuen

Sun

Zhu

2011

ASME 2011 Dynamic Systems and Control Conference and Bath/Asme Symposium on Fluid Power and Motion Control, Volume 2

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Increasing need for clean and efficient energy conversion devices in the automotive sector has pushed technologies such as homogeneous charge compression ignition (HCCI) to the forefront of research. While it offers a number of major advantages in terms of efficiency and emissions, HCCI has significant challenges to overcome before it can be used in a production setting. Among those challenges is the need to control the start of combustion, and one method for doing that is to use variable valve timing to utilize hot, residual exhaust gas. Critical to these residual-affected methods is the role of mixing on the thermodynamic state. This work presents a method for validating a control-oriented two-zone mixing model for HCCI using CFD software. A method of discretizing, extracting, and analyzing the results of the CFD simulation is described, and it is compared with the two-zone model. There is strong correlation, but there is also evidence that the twozone model needs to be further developed to fully capture the dynamics of mixing.

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Section: Resultsmentioning

confidence: 99%

Section: Future Workmentioning

confidence: 99%

A Novel Method for CFD Analysis of a Two-Zone Mixing Model for HCCI Engines

McCuen

Sun

Zhu

2011

ASME 2011 Dynamic Systems and Control Conference and Bath/Asme Symposium on Fluid Power and Motion Control, Volume 2

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“…One set of cams with long duration and high lift is suitable for SI operation while the other one, with short duration and low lift, is used for HCCI operation. Openloop experimentation results are shown in Cairns A and Blaxill, 35 Kalian et al, 36 Wu et al 37 and Nier 38 while 17,19,39,40 present simulation results.…”

Section: Dynamics Of Mode Switchesmentioning

confidence: 99%

Accounting for combustion mode switch dynamics and fuel penalties in drive cycle fuel economy

Nüesch

Gorzelic

Jiang

et al. 2015

International Journal of Engine Research

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A methodology is introduced to analyze the drive cycle fuel economy of a vehicle equipped with a multimode combustion engine, utilizing commercial cam phasers and two-step cam profile switching. The analysis is based on a longitudinal vehicle model with manual transmission. The engine model employs a finite state machine describing mode switches between two distinct combustion modes, namely, spark-ignited and homogeneous charge compression ignition. Preliminary combustion mode switch experiments were used to parameterize the model. The influence of mode switch fuel penalties on drive cycle fuel economy was quantified through application of the model to the federal test procedure (FTP-75), the highway fuel economy test (HWFET) and the US06 supplemental federal test procedure. The mode switches were analyzed individually in terms of their benefit on fuel economy and a distinction was made between harmful and beneficial mode switches. Mode switches were defined as harmful whether their fuel penalty is greater than the benefits originating from spending time in the subsequent homogeneous charge compression ignition mode. A parametric study was conducted to investigate the impact of harmful mode switches on fuel economy as a function of the fuel penalties during the switch. In the case of high fuel penalties, supervisory control becomes an important tool for minimizing the number of harmful mode switches. One possible supervisory strategy discussed is a smoothing strategy, in which a mode switch is delayed by introducing a dwell time.

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“…If spark ignition never occurs, the variable T in equation (1) equals the in-cylinder gas temperature, while during the SI combustion phase T equals the unburned gas temperature T U , which is calculated by the two-zone SI combustion model that is presented in the third section. This is also the main motivation of developing the two-zone SI combustion model, since the one-zone SI combustion model proposed by Yang and colleagues 21,22 does not provide this required information.…”

Section: Si-hcci Hybrid Combustion Model Architecturementioning

confidence: 99%

A control-oriented hybrid combustion model of a homogeneous charge compression ignition capable spark ignition engine

Yang

Zhu

2012

Proceedings of the Institution of Mechanical Engineers, Part D:

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To implement the homogeneous charge compression ignition combustion mode in a spark ignition engine, it is necessary to have smooth mode transition between the spark ignition and homogeneous charge compression ignition combustions. The spark ignition–homogeneous charge compression ignition hybrid combustion mode modeled in this paper describes the combustion mode that starts with the spark ignition combustion and ends with the homogeneous charge compression ignition combustion. The main motivation of studying the hybrid combustion mode is that the percentage of the homogeneous charge compression ignition combustion is a good parameter for combustion mode transition control when the hybrid combustion mode is used during the transition. This paper presents a control oriented model of the spark ignition–homogeneous charge compression ignition hybrid combustion mode, where the spark ignition combustion phase is modeled under the two-zone assumption and the homogeneous charge compression ignition combustion phase under the one-zone assumption. Note that the spark ignition and homogeneous charge compression ignition combustions are special cases in this combustion model. The developed model is capable of simulating engine combustion over the entire operating range, and it was implemented in a real-time hardware-in-the-loop simulation environment. The simulation results were compared with those of the corresponding GT-Power model, and good correlations were found for both spark ignition and homogeneous charge compression ignition combustions.

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A Control Oriented SI and HCCI Hybrid Combustion Model for Internal Combustion Engines

Cited by 8 publications

References 15 publications

A Novel Method for CFD Analysis of a Two-Zone Mixing Model for HCCI Engines

A Novel Method for CFD Analysis of a Two-Zone Mixing Model for HCCI Engines

Accounting for combustion mode switch dynamics and fuel penalties in drive cycle fuel economy

A control-oriented hybrid combustion model of a homogeneous charge compression ignition capable spark ignition engine

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