Closed-Loop Control of Combustion Phasing in an HCCI Engine Using VVA and Variable EGR

Research output: Contribution to conferencePaper, not in proceeding


A homogeneous charge compression ignition (HCCI) engine requires closed-loop control of combustion phasing for reliable operation. Variable valve actuation (VVA) has previously been shown to enable cycle-to-cycle, cylinder-individual control with high precision, but suffers from a narrow operating range. Adding variable exhaust gas recirculation (EGR) to the closed-loop control structure can extend the operating range. A mid-ranging control structure is presented here for combined VVA and EGR actuations in a multi-cylinder engine. The control structure is simple to implement and preserves the fast, cylinderindividual, and precise actuation of the VVA system while extending the operating range. Experimental results verify the performance of the control structure.


Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Other Mechanical Engineering
  • Control Engineering


  • EGR, VVA, HCCI, Mid-ranging control
Original languageEnglish
Publication statusPublished - 2007
Publication categoryResearch
Event5th IFAC Symposion on Advances in Automotive Control - Monterey, United States
Duration: 0001 Jan 2 → …


Conference5th IFAC Symposion on Advances in Automotive Control
CountryUnited States
Period0001/01/02 → …

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