Modeling and validation of turbocharged diesel engine airpath and combustion systems

B. Unver, Y. Koyuncuoglu, M. Gokasan*, S. Bogosyan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

The ultimate aim of this study is the development of an engine modeling approach that would facilitate the design of model-based control techniques for diesel engines. This will allow for the development of more generalized, modular control strategies for different engine types and sizes as opposed to the commonly practiced map-based engine control strategies that depend on maps and feedforward control and require lengthy modifications every time a change is made. Also, most engine modeling studies focus on either airpath or combustion systems, treating these models and their validation individually, and not as an integrated system as is actually the case. To address the need for more realistic models suitable for model-based control design, this study develops a combined airpath and combustion model for the engine, using analytical models wherever possible and derives a model with appropriate control inputs and outputs that could be used in a control scheme. The inclusion of the actuator dynamics of the Exhaust gas recirculation (EGR), variable geometry turbine (VGT), and Throttle (THR) valves in the airpath model and the consideration of nonlinearities in the combustion model allow for the development of a more thorough engine model, as well as the validation of subsystems and the whole integrated engine model using a complete World Harmonized Transient Cycle (WHTC). This test cycle finds limited use due to its challenging transients, and yet, is the demanded test cycle for emission regulations nowadays. These are unique aspects of this modeling study, the results of which indicate that the developed engine model could be used in control design and hardware-in-the-loop simulation (HILS) based engine control prototyping.

Original languageEnglish
Pages (from-to)13-34
Number of pages22
JournalInternational Journal of Automotive Technology
Volume17
Issue number1
DOIs
Publication statusPublished - 1 Feb 2016

Bibliographical note

Publisher Copyright:
© 2016, The Korean Society of Automotive Engineers and Springer-Verlag Berlin Heidelberg.

Keywords

  • Airpath model
  • Combustion model
  • Control based diesel engine model
  • EGR valve
  • Model validation
  • Parameter estimation
  • THR valve
  • VGT valve
  • WHTC

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