IN-CYLINDER MASS FLOW ESTIMATION AND MANIFOLD PRESSURE DYNAMICS FOR STATE PREDICTION IN SI ENGINES

Authors

  • Wojnar Sławomir Slovak University of Technology in Bratislava, Faculty of Mechanical Engineering, Institute of Automation, Measurement and Applied informatics, Námestie slobody 17, 812 31 Bratislava
  • Boris Rohal-Ilkiv Slovak University of Technology in Bratislava, Faculty of Mechanical Engineering, Institute of Automation, Measurement and Applied informatics, Námestie slobody 17, 812 31 Bratislava
  • Peter Šimončic Slovak University of Technology in Bratislava, Faculty of Mechanical Engineering, Institute of Automation, Measurement and Applied informatics, Námestie slobody 17, 812 31 Bratislava
  • Marek Honek Slovak University of Technology in Bratislava, Faculty of Mechanical Engineering, Institute of Automation, Measurement and Applied informatics, Námestie slobody 17, 812 31 Bratislava
  • Csambál Jozef Slovak University of Technology in Bratislava, Faculty of Mechanical Engineering, Institute of Automation, Measurement and Applied informatics, Námestie slobody 17, 812 31 Bratislava

DOI:

https://doi.org/10.14311/AP.2014.54.0240

Abstract

The aim of this paper is to present a simple model of the intake manifold dynamics of a spark ignition (SI) engine and its possible application for estimation and control purposes. We focus on pressure dynamics, which may be regarded as the foundation for estimating future states and for designing model predictive control strategies suitable for maintaining the desired air fuel ratio (AFR). The flow rate measured at the inlet of the intake manifold and the in-cylinder flow estimation are considered as parts of the proposed model. In-cylinder flow estimation is crucial for engine control, where an accurate amount of aspired air forms the basis for computing the manipulated variables. The solutions presented here are based on the mean value engine model (MVEM) approach, using the speed-density method. The proposed in-cylinder flow estimation method is compared to measured values in an experimental setting, while one-step-ahead prediction is illustrated using simulation results.

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Published

2014-06-27

Issue

Vol. 54 No. 3 (2014)

Section

Articles

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How to Cite

Sławomir, W., Rohal-Ilkiv, B., Šimončic, P., Honek, M., & Jozef, C. (2014). IN-CYLINDER MASS FLOW ESTIMATION AND MANIFOLD PRESSURE DYNAMICS FOR STATE PREDICTION IN SI ENGINES. Acta Polytechnica, 54(3), 240-247. https://doi.org/10.14311/AP.2014.54.0240