Picture of automobile manufacturing plant

Driving innovations in manufacturing: Open Access research from DMEM

Strathprints makes available Open Access scholarly outputs by Strathclyde's Department of Design, Manufacture & Engineering Management (DMEM).

Centred on the vision of 'Delivering Total Engineering', DMEM is a centre for excellence in the processes, systems and technologies needed to support and enable engineering from concept to remanufacture. From user-centred design to sustainable design, from manufacturing operations to remanufacturing, from advanced materials research to systems engineering.

Explore Open Access research by DMEM...

Model-based nonlinear multivariable engine control

Dutka, A. and Javaherian, H. and Grimble, M.J. (2007) Model-based nonlinear multivariable engine control. In: American Control Conference 2007, 2007-07-09 - 2007-07-13.

Full text not available in this repository. Request a copy from the Strathclyde author

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.