Idle speed control using a describing-function approach

S. H. The, A. Nassirharand*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


A new systematic method for idle speed control of uncertain automobile engines with a time delay is developed. The method is based on obtaining a describing-function model of the internal combustion engine. This is followed by designing a classical controller via an algebraic approach. The design method and the associated software are applied to a specific automobile engine, and it is shown that the results compete with the observer-based design of Bengea et al. Stability is demonstrated by successful generation of describing-function models of the final non-linear closed-loop system.

Original languageEnglish
Pages (from-to)533-545
Number of pages13
JournalProceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering
Issue number4
Publication statusPublished - 1 Apr 2010
Externally publishedYes


  • Algebraic design
  • Engine control
  • Ford V8 engine
  • Multi-variable control
  • Optimization
  • Time delay systems

Cite this