Supervisory multiple-model approach to multivariable lambda and torque control of sI engines

Majeckie, P. and Javaherian, H. and Grimble, M.J. (2009) Supervisory multiple-model approach to multivariable lambda and torque control of sI engines. In: 2009 IFAC Workshop on Engine and Powertrain Control, Simulation and Modeling, 2009-11-30 - 2009-12-02. (https://doi.org/10.3182/20091130-3-FR-4008.00004)

[thumbnail of Supervisory Multiple-Model Approach to Multivariable Lambda and Torque Control of SI Engines] Microsoft Word. Filename: ifac_multimodel_final_submission_Pawel_Majecki.doc
Accepted Author Manuscript
Download (472kB)

Abstract

The problem of simultaneous air-fuel ratio regulation and torque tracking in a spark ignition engine with electronic throttle control is considered. The proposed methodology involves the use of a set of piecewise-affine models to represent the nonlinear engine dynamics. These models are the basis of a supervisory multiple-model control scheme, which, in its simplest form, consists in switching among the predefined bank of controllers. In the following a monitoring signal generator is driven by a bank of observers, and a supervisor ensures the robustness of the switching scheme. An optimal linear-quadratic cost function enables the trade-off between emissions performance and drivability to be adjusted. Simulation results using the data obtained from a vehicle with a 5.3L V8 engine on Federal Test Procedure (FTP) driving cycles are presented, with a nonlinear regression model of the engine identified from the FTP data. The results indicate that both tight lambda regulation and fast torque tracking are possible using the proposed designs.

CORE (COnnecting REpositories)