Control-Oriented "Crank-Angle" Based Modeling of Automotive Engines University of Parma

Format:

Conference/Event

Author/Creator:

Gambarotta, Gambarotta, author.

Contributor:

Lucchetti lng, Gabriele

Conference Name:

10th International Conference on Engines & Vehicles (2011-09-11 : Naples, Italy)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2011

Summary:

It is well known that in automotive applications problemsrelated to control and management are nowadays of paramountimportance to improve engine performance and to reduce fuelconsumption and pollutant emissions. In the design of control anddiagnostics systems, the use of theoretical models proved to bevery promising, also to reduce development time and costs, aswidely documented in the open literature. From this point of view,the complexity of actual engines due both to the continuousenhancement of existing subsystems (e.g., turbochargers, exhaustgas recirculation systems, aftertreatment components, et cetera) and tothe introduction of specific devices (e.g., Variable ValveActuation systems) give rise to challenging issues in modelingdevelopment and applications.The paper describes a theoretical model of an automotive enginebuilt up starting from the original library developed in Simulink®by the authors for the simulation of last generation automotiveengines. The tool was used in former works to build up Mean ValueModels (MVMs) of automotive engines for "real-time"simulations, which were used in Hardware-in-the-Loop (HiL)applications. The model proposed in this work is an enhancement ofthe mentioned ones to allow for "crank-angle" simulationsof engine thermodynamic processes. To this extent several blockswere built up for the simulation of intake and exhaust valves (withuser-defined lift curves and variable actuation) and of in-cylinderprocesses. Combustion process has been described following aclassic single-zone approach based on a proper Heat Release Rate(HRR). Other components of the intake and exhaust systems weremodeled by using the original library blocks.Through a specific calibration procedure, the model was fittedon the typical layout of an automotive SI engine allowing forsteady and transient simulations of the engine behavior. Calculatedresults are compared in the paper with available experimental data,showing a good agreement

Notes:

Vendor supplied data

Publisher Number:

2011-24-0144

Access Restriction:

Restricted for use by site license