Control of Throttle Valve in Idle Speed condition

The primary intention of this paper is to apply a robust controller based on quantitative feedback theory approach on engine to control it at idle speed. Control of automotive engines is important because it yields benefits on several issues such as fuel efficiency, exhaust emission reduction and better power delivery. Quantitative design of robust control systems proposes a transparent and practical controller design methodology for uncertain single-input single-output and multivariable plants. Since the engine Throttle Valve dynamic has multivariable nonlinear transfer functions, in this paper QFT technique is used for designing the proposed controller. After linearization of model, a robust controller is designed for tracking problem. Next, simulation for tracking problem has been carried out which indicates successful design of controller. There are several steps involved in the design of mentioned controller. The main steps involved in designing are template generation and loop shapingdesign. The research demonstrates that applying the proposed technique successfully overcomes obstacles for robust control of Idle Speed Mode.