Engine idle speed control via maximal safe set computation in the crank-angle domain

In this paper, the idle speed control problem is addressed via maximal safe set computation. A hybrid model of the engine in idle mode is used. The solution is based on the transformation of the continuous dynamics from the time-domain to the crank-angle domain and on the linearization and discretization of these dynamics. A flexible and portable algorithm in the discrete-time domain is proposed for the determination of the maximal safe set. Simulation results show the efficiency of the proposed approach.