Digital idle speed control of automotive engines using hybrid models

Authors:	Girasole Giovanni, University of L'Aquila, Italy De Santis Elena, University of L'Aquila, Italy Di Benedetto Maria Domenica, University of L'Aquila, Italy
Topic:	1.3 Discrete Event and Hybrid Systems
Session:	Analysis and Design of Hybrid Systems II
Keywords:	Engine Control, Hybrid systems, Safe Set Computation

Abstract

In this paper, the idle speed control problem for an automotive engine is posed as the one of computing a maximal safe set for a hybrid system modeling an SI engine in idle mode. Since this computation is intractable in practice, we exploit the relations established between safe sets for a continuous-time switching system S and an appropriate discrete-time switching system associated with S to reduce its complexity drastically. A flexible and portable algorithm in the discrete-time domain is proposed for the determination of the maximal safe set. Our methodology is general enough to be easily extended to different problems in the hybrid domain. Simulation results show the efficiency of the proposed approach.