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A Control-Oriented Mean-Value Model of HCCI Diesel Engines With External Mixture Formation

[+] Author Affiliations
Marcello Canova

University of Parma

Luca Garzarella, Marco Ghisolfi

Politecnico di Milano

Shawn Midlam-Mohler, Yann Guezennec, Giorgio Rizzoni

Ohio State University

Paper No. IMECE2005-79571, pp. 355-365; 11 pages
  • ASME 2005 International Mechanical Engineering Congress and Exposition
  • Dynamic Systems and Control, Parts A and B
  • Orlando, Florida, USA, November 5 – 11, 2005
  • Conference Sponsors: Dynamic Systems and Control Division
  • ISBN: 0-7918-4216-9 | eISBN: 0-7918-3769-6
  • Copyright © 2005 by ASME


Homogeneous Charge Compression Ignition (HCCI) is considered a promising concepts to achieve low NOx and Particulate Matter emissions in traditional Spark Ignition and Diesel engines. However, understanding and controlling the complex mechanisms which govern the combustion process is still extremely difficult. A viable method to obtain HCCI combustion in DI Diesel engines consists of premixing the charge by applying an additional fuel injector in the intake port, thus decoupling the HCCI mixture formation from the traditional in-cylinder injection. The system allows high load operation in DI mode without compromising performance, low to mid-load operation in HCCI mode, and a region in between where both systems operate together. To manage HCCI combustion with external mixture formation it is essential to identify the most important control parameters and understand their influence on the auto-ignition process. The proposed paper deals with the analysis of HCCI combustion with external mixture formation through experimental investigation and a Control-Oriented mean-value model. The model provides the data required by a combustion calculation algorithm to perform a first-law analysis that estimates the in-cylinder heat release and pressure. The tool developed was then validated on data provided by an extensive experimental activity on a 4-cylinder Diesel engine equipped with an external fuel atomizer to operate in HCCI mode.

Copyright © 2005 by ASME



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