Technical Paper
Model Based Calibration of a Multi Cylinder Spark Ignition Engine for Idle Speed Control Using PID Control Strategy
2023-04-11
2023-01-0210
An idle speed controller allows the engine to idle at the lowest possible RPM without stalling to support various power-consuming accessories. In this study, an idle speed control system is designed using a PID control strategy based on an engine model. The engine model was developed considering engine dynamics and various cylinder airflow calculation methodologies, such as Speed-density, Alpha-N, and Throttle-flow. The engine model was created in MATLAB Simulink. The model utilizes several calibrated lookup tables that were obtained using the model-based calibration (MBC) technique. A multi-cylinder spark ignition (SI) engine was calibrated using the MATLAB MBC Toolbox to generate real-time maps for idle speed control. This paper aims to investigate the performance of the developed idle speed controller for different cylinder airflow calculation methodologies. The idle speed control system was simulated for various load-torque disturbances to evaluate the controller's performance.