HCCI Operation - Closed loop combustion control using VVA or dual fuel

Petter Strandh

Research output: ThesisDoctoral Thesis (compilation)

Abstract

The current technology within combustion engines have the possibility of handling the more stringent legislative demands on combustion engines. However the required solutions are getting more expensive and technically challenging. One possible way towards a more simple

exhaust aftertreatment system is the use of the Homogeneous Charge Compression Ignition (HCCI) engine cycle. The main advantage of the HCCI engine is its low output of NOx exhaust emissions. Because of its indirect combustion initiation the main disadvantage is that it requires closed loop control of its combustion process. Two methods for engine timing control were used, dual fuels or variable valve actuation(VVA). With dual fuels the timing change was achieved by changing the autoignition properties of the homogeneous charge and with VVA, timing control was achieved by changing the effective compression ratio.

This thesis focuses on the control of the HCCI engine. For the purpose of studying control of the HCCI engine, special engine control software was developed. This software aimed towards engine cycle-to-cycle control and actuation. Another aid in the development was the use of Matlab/Simulink for the design of powerful control algorithms.

Successful system identification control design has been shown. Different control strategies were tested, amongst the most successful was the use of Model Predictive Control (MPC), which is a control strategy that can take care of the nonlinear behavior of the dynamic engine system and its actuators. It was concluded that low order models were sufficient for capturing the important HCCI engine dynamics.

The use of ion current for detection and control of the HCCI combustion was also shown. A method for obtaining combustion timing from the ion current was defined and investigated. Closed-loop control using ion currents on an HCCI engine was demonstrated.
Original languageEnglish
QualificationDoctor
Awarding Institution
  • Combustion Engines
Supervisors/Advisors
  • Tunestål, Per, Supervisor
Award date2006 May 29
Publisher
Print ISBNs978-91-628-6845-1
Publication statusPublished - 2006

Bibliographical note

Defence details

Date: 2006-05-29
Time: 10:15
Place: Room B, M-building, Ole Römers väg 1, Faculty of Engineering, Lund University

External reviewer(s)

Name: Ryan, Thomas
Title: phd
Affiliation: Southwest research institute

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<div class="article_info">Petter Strandh, Magnus Christensen, Johan Bengtsson, Rolf Johansson, Andreas Vressner, Per Tunestål and Bengt Johansson. <span class="article_issue_date">2003</span>. <span class="article_title">Ion Current Sensing for HCCI Combustion Feedback</span> <span class="journal_distributor">SAE International</span></div>
<div class="article_info">Johan Bengtsson, Petter Strandh, Rolf Johansson, Per Tunestål and Bengt Johansson. <span class="article_issue_date">2004</span>. <span class="article_title">Closed-loop Combustion Control of Homogeneous Charge Compression Ignition (HCCI) Engine Dynamics</span> <span class="journal_series_title">International Journal of adaptive control and signal processing</span>, <span class="journal_volume">vol 18</span> </div>
<div class="article_info">Johan Bengtsson, Petter Strandh, Rolf Johansson, Per Tunestål and Bengt Johansson. <span class="article_issue_date">2004</span>. <span class="article_title">Control of Homogeneous Charge Compression Ignition (HCCI) Engine Dynamics</span> <span class="journal_pages">pp 4048-­4053</span>. <span class="journal_distributor">American Control Conferance</span></div>
<div class="article_info">Johan Bengtsson, Petter Strandh, Rolf Johansson, Per Tunestål and Bengt Johansson. <span class="article_issue_date">2004</span>. <span class="article_title">System identifcation of homogeneous charge compression ignition (HCCI) engine dynamics</span> <span class="journal_pages">pp 250-­255</span>. <span class="journal_distributor">International Federation of Automatic Control, Advances In Automotive Control, 2004</span></div>
<div class="article_info">Petter Strandh, Johan Bengtsson, Rolf Johansson, Per Tunestål and Bengt Johansson. <span class="article_issue_date">2004</span>. <span class="article_title">Cycle-­t-o­cycle control of a dual-­fuel HCCI engine</span> <span class="journal_distributor">SAE International</span></div>
<div class="article_info">Andreas Vressner, Petter Strandh, Anders Hultqvist and Bengt Johansson. <span class="article_issue_date">2004</span>. <span class="article_title">Multiple Point Ion Current Diagnostics in An HCCI Engine</span> <span class="journal_distributor">SAE interntional</span></div>
<div class="article_info">Petter Strandh, Johan Bengtsson and Magnus Gävert. <span class="article_issue_date">2004</span>. <span class="article_title">Modeling of HCCI Engine Combustion for Control Analysis</span> <span class="journal_distributor">Conferance of Decision and Control</span></div>
<div class="article_info">Petter Strandh, Johan Bengtsson, Rolf Johansson, Per Tunestål and Bengt Johansson. <span class="article_issue_date">2005</span>. <span class="article_title">Variable Valve Actuation for Timing Control of a Homogeneous Charge Compression Engine</span> <span class="journal_distributor">SAE International</span></div>
<div class="article_info">Johan Bengtsson, Petter Strandh, Rolf Johansson, Per Tunestål and Bengt Johansson. <span class="article_issue_date">2006</span>. <span class="article_title">Multi­Output Control of a heavy duty HCCI Engine using Variable Valve Actuation and Model Predictive Control</span> <span class="journal_distributor">SAE international</span></div>
<div class="article_info">Johan Bengtsson, Petter Strandh, Rolf Johansson, Per Tunestål and Bengt Johansson. <span class="article_issue_date">2006</span>. <span class="article_title">Model Predictive Control of Homogeneous Charge Compression Igni­tion (HCCI) Engine Dynamics</span> <span class="journal_series_title">International Conference on Control Applications, 2006.</span>, <span class="journal_distributor">IEEE</span> (accepted)</div>
<div class="article_info">Johan Bengtsson, Petter Strandh, Rolf Johansson, Per Tunestål and Bengt Johansson. <span class="article_issue_date">2006</span>. <span class="article_title">Hybrid Control of Homogeneous Charge Compression Ignition (HCCI) Engine Dynamics</span> <span class="journal_series_title">International Journal of Control</span>, <span class="journal_volume">vol 79</span> <span class="journal_pages">pp 422-448</span>. (inpress)</div>

Subject classification (UKÄ)

  • Other Mechanical Engineering

Keywords

  • Motorer
  • framdrivningssystem
  • Motors and propulsion systems
  • applied thermodynamics
  • Model Predictive Control
  • System Identification
  • HCCI
  • Closed Loop Combustion control
  • termodynamik
  • Termisk teknik
  • Thermal engineering
  • Ion Current

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