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Self-tuning gross heat release computation for internal combustion engines

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Author

Summary, in English

The paper describes a novel method for self-tuning gross heat release computation in internal combustion engines suitable for both online usage in combustion phasing control applications and post-processing of cylinder pressure measurements. The method estimates the polytropic exponents and cylinder pressure offsets immediately preceding and succeeding the combustion event, respectively, using a fast nonlinear least-squares method. The polytropic exponent and the pressure offset are subsequently interpolated during the combustion event and a net heat release computation is performed based on the interpolated exponent and pressure. The result is a self-tuning gross heat release algorithm with no need to model heat losses, crevice losses and blow-by explicitly. (C) 2008 Elsevier Ltd. All rights reserved.

Department/s

Publishing year

2009

Language

English

Pages

518-524

Publication/Series

Control Engineering Practice

Volume

17

Issue

4

Document type

Journal article

Publisher

Elsevier

Topic

  • Other Mechanical Engineering

Keywords

  • Nonlinear
  • squares
  • Least
  • Estimation
  • Engine control
  • Cylinder pressure
  • Heat release

Status

Published

Project

  • Competence Centre for Combustion Processes

ISBN/ISSN/Other

  • ISSN: 0967-0661