A control design and calibration reduction methodology for AFR control in gasoline engines
| Autor: | Sai S. V. Rajagopalan, Stephen Yurkovich, Kenneth P. Dudek, Jason Meyer, Yann Guezennec, Shawn Midlam-Mohler |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Engineering
business.industry Applied Mathematics Bandwidth (signal processing) Servomechanism Original equipment manufacturer Computer Science Applications law.invention Setpoint Control and Systems Engineering Control theory law Dither Electrical and Electronic Engineering Gasoline business Oxygen sensor Driving cycle |
| Zdroj: | Control Engineering Practice. 27:42-53 |
| ISSN: | 0967-0661 |
| DOI: | 10.1016/j.conengprac.2014.02.020 |
| Popis: | A control architecture for air to fuel ratio (AFR) control of gasoline engines designed to work with switching and/or wide range oxygen sensors, with the goal of minimizing calibration effort while meeting performance requirements, is described. A high bandwidth, dithered inner-loop reference tracking controller with pre-catalyst oxygen sensor feedback coupled with a low bandwidth setpoint tracking outer-loop with post catalyst oxygen sensor feedback, is used to control engine exhaust and O 2 storage in the three-way catalyst (TWC), respectively. A total synthesis inspired design ensures that significant non-linearity in the system is handled through a coordinated and corrective action and expected response blocks in the open-loop, without burdening the closed loop controller. Calibration is achieved offline, through closed loop optimization using genetic algorithms, while simultaneously meeting performance and stability criteria with significantly reduced need for in-vehicle tuning. Experimental results show comparable emissions performance with the stock OEM AFR controller under warmed up conditions over a standard drive cycle. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect