Stochastic Limit Control and Its Application to Knock Limit Control Using Ionization Feedback 2005-01-0018
Spark timing of an Internal Combustion (IC) engine is often limited by engine knock in the advanced direction. The ability to operate the engine at its advanced (borderline knock) spark limit is the key for improving output power and fuel economy. Due to combustion cycle-to-cycle variations, IC engine combustion behaves similar to a random process and so does the engine performance criteria, such as IMEP (Indicated Mean Effective Pressure), and knock intensity. The combustion stability measure COVariance of IMEP assumes the IMEP is a random process. Presently, the spark limit control of IC engines is deterministic in nature. The controller does not utilize any stochastic information associated with control parameters such as knock intensity for borderline spark limit control. This paper proposes a stochastic limit control strategy for borderline knock control. It also develops a simple stochastic model for evaluating the proposed stochastic controller. The stochastic limit control is applied to borderline knock limit control on a 3.0L V6 engine.
Citation: Zhu, G., Haskara, I., and Winkelman, J., "Stochastic Limit Control and Its Application to Knock Limit Control Using Ionization Feedback," SAE Technical Paper 2005-01-0018, 2005, https://doi.org/10.4271/2005-01-0018. Download Citation
Author(s):
Guoming G. Zhu, Ibrahim Haskara, Jim Winkelman
Affiliated:
Visteon Corporation
Pages: 10
Event:
SAE 2005 World Congress & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Electronic Engine Controls 2005-SP-1975, SAE 2005 Transactions Journal of Engines-V114-3
Related Topics:
Fuel economy
Knock
Combustion and combustion processes
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