Controls-oriented modelling and LQR control of natural gas HCCI engines

Marwa AbdelGawad, Reza Tafreshi, Reza Langari

Research output: Contribution to journalArticle

Abstract

Homogeneous charge compression ignition (HCCI) engines have been proposed as a solution to designing efficient engines that follow emission regulations set by the US Environmental Protection Agency. The main idea behind HCCI engines is to combust a lean, homogeneous air-fuel mixture using compression. However, due to the fact that HCCI combustion is triggered by auto-ignition of the mixture during compression, there is no direct method of controlling combustion timing to ensure maximum efficiency. Therefore, the goal of this paper is to develop a control strategy for ignition timing of natural gas HCCI engines at steady-state conditions. To model the engine, a controls-oriented model is developed based on the modified knock integral model and is validated using a model developed by GT-power. Furthermore, a linear quadratic regulator is designed to control the engine timing. Simulation results show that the control system can track engine timing within 0.5% of its target value.

Original languageEnglish
Pages (from-to)205-234
Number of pages30
JournalInternational Journal of Vehicle Performance
Volume1
Issue number2
DOIs
Publication statusPublished - 1 Jan 2013

Fingerprint

Natural Gas
Ignition
Natural gas
Engine
Compression
Charge
Engines
Modeling
Timing
Combustion
Compaction
Environmental Protection Agency
Direct Method
Regulator
Model
Control Strategy
Control System
Control systems
Target
Air

Keywords

  • Control model
  • Homogeneous charge compression ignition engine
  • Linear quadratic regulator
  • LQR
  • Natural gas

ASJC Scopus subject areas

  • Mechanics of Materials
  • Automotive Engineering
  • Computer Science Applications
  • Modelling and Simulation
  • Fuel Technology
  • Safety, Risk, Reliability and Quality
  • Mechanical Engineering

Cite this

Controls-oriented modelling and LQR control of natural gas HCCI engines. / AbdelGawad, Marwa; Tafreshi, Reza; Langari, Reza.

In: International Journal of Vehicle Performance, Vol. 1, No. 2, 01.01.2013, p. 205-234.

Research output: Contribution to journalArticle

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