Self Tuning Controller for Reducing Cycle to Cycle Variations in SI Engine

DOI

10.2991/seee-15.2015.25How to use a DOI?

Keywords

cyclic variations; cylinder pressure; SI engines

Abstract

The cyclic variations in spark ignition engines occurring especially under specific engine operating conditions make the maximum pressure variable for successive in-cylinder pressure cycles. Minimization of cyclic variations has a great importance in effectively operating near to lean limit, or at low speed and load. The cyclic variations may reduce the power output of the engine, lead to operational instabilities, and result in undesirable engine vibrations and noise. In this study, spark timing is controlled in order to reduce the cyclic variations in spark ignition engines. Firstly, an ARMAX model has developed between spark timing and maximum pressure using system identification techniques. By using this model, the maximum pressure of the next cycle has been predicted. Then, self-tuning minimum variance controller has been designed to change the spark timing for consecutive cycles of the first cylinder of test engine to regulate the in-cylinder maximum pressure. The performance of the proposed controller is illustrated in real time and experimental results show that the controller has a reliable effect on cycle to cycle variations of maximum cylinder pressure when the engine works under low speed conditions.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Alir za Kaleli
AU  - M. Akif Ceviz
AU  - Köksal Erentürk
PY  - 2015/10
DA  - 2015/10
TI  - Self Tuning Controller for Reducing Cycle to Cycle Variations in SI Engine
BT  - Proceedings of the 2015 International Conference on Sustainable Energy and Environmental Engineering
PB  - Atlantis Press
SP  - 99
EP  - 102
SN  - 2352-5401
UR  - https://doi.org/10.2991/seee-15.2015.25
DO  - 10.2991/seee-15.2015.25
ID  - Kaleli2015/10
ER  -