Model-based nonlinear multivariable engine control

A. Dutka, H. Javaherian, M.J. Grimble

Research output: Contribution to conferencePaper

6 Citations (Scopus)

Abstract

Optimal solutions for simultaneous air and fuel control in a spark ignition engine with the electronic throttle control are investigated. In an optimization framework, the method uses the already identified nonlinear physical models of engine processes for simultaneous torque tracking and air- fuel ratio regulation at the stoichiometric value. Simple physical arguments are used to reformulate the infeasible direct optimization problem into the optimal model predictive control framework for which a solution is sought. In the reformulated optimization problem, the engine torque is directly related to the cylinder air charge so that simpler feasible solutions for real-time control are obtained. Based on the identified engine models and predictive interpretation of the driver torque demand in a throttle-by-wire control strategy, the throttle position and the amount of fuel injection at every engine event are determined. Simulation studies of the predictive control solutions over the aggressive US06 driving cycles indicate that significant improvements in the transient accuracy of the air-fuel ratio control and fast delivery of the diver's torque request through more aggressive throttle actuation are possible.
Original languageEnglish
Pages3671-3677
Number of pages7
DOIs
Publication statusPublished - 2007
EventAmerican Control Conference 2007 - New York, United States
Duration: 9 Jul 200713 Jul 2007

Conference

ConferenceAmerican Control Conference 2007
CountryUnited States
CityNew York
Period9/07/0713/07/07

Keywords

  • control systems
  • engine cylinders
  • predictive control

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    Dutka, A., Javaherian, H., & Grimble, M. J. (2007). Model-based nonlinear multivariable engine control. 3671-3677. Paper presented at American Control Conference 2007, New York, United States. https://doi.org/10.1109/ACC.2007.4282263