Adaptive Air-Fuel-Ratio control for SI Engine
In an automobile, controlling Air-Fuel rate to Stoichiometric ratio is very important because it decides the engine efficiency and exhaust emissions. This work treats the an adaptive controller for engine Air-Fuel-Ratio (AFR) control to improve the engine efficiency and reduce emission, using an adaptive law to support smith predictor with variable time delay. And analysis of engine AFR control using this controller with reference to the smith predictor controller and PID controller in different conditions.
Scope of project
Designing an adaptive controller for engine Air-Fuel-Ratio (AFR) control to improve the engine efficiency and reduce emission, using an adaptive law to support smith predictor with variable time delay.
Description
The AFR decide the efficiency of engine and exhaust emission. To improve the efficiency of engine and reduce the emission, the AFR need to maintain at stoichiometric ratio (14.63: 1). And maintaining AFR to stoichiometric ratio is challenging job and still toady lot of innovation are going to control the engine AFR.
Currently, AFR controlling by different control algorithms example an adapting law for Fuel delivery to fuel injector (JIAO, SHEN, 2011), Feed forward controller using inverse fuel model (Junichi, Shuntaro and Naoto, 2009), Smith predictor with process model to predict the desired fuel flow into fuel injector (Chanyut, Kazuhisa and Tielong, 2015), Adaptive Posicast Controller (APC) to control fuel flow into injector (Yildiz, Annaswamy, Yanakiev, and Kolmanovsky, 2008) and so on. The controller is designed to control the fuel into injector based on Air flow to intake manifold and AFR from EGO.