Dynamic cylinder activation in diesel engines

Dheeraj B. Gosala, Cody M. Allen, Gregory M. Shaver, Lisa Farrell, Edward Koeberlein, Brian Franke, Dale Stretch, James McCarthy

Research output: Contribution to journalArticlepeer-review


Cylinder deactivation has been recently demonstrated to have fuel savings and aftertreatment thermal management benefits at low to moderate loads compared to conventional operation in diesel engines. This study discusses dynamic cylinder activation as an effective variant to fixed diesel engine cylinder deactivation. The set of inactive and active cylinders varies on a cycle-by-cycle basis during dynamic cylinder activation. This enables greater control over forcing frequencies of the engine, thereby allowing the engine to operate away from the drivetrain resonant frequency at all engine speeds, while maintaining similar fuel savings, thermal management, and emission characteristics as fixed cylinder deactivation. Additional benefits of dynamic cylinder activation include a reduction in the consecutive number of cycles a given cylinder is deactivated, and more even cylinder usage. Enablement of engine operation without exciting drivetrain resonant frequencies at similar fuel efficiency and emissions as fixed cylinder deactivation makes dynamic cylinder activation a strong candidate to augment the benefits already demonstrated for fixed cylinder deactivation.

Original languageEnglish (US)
Pages (from-to)849-861
Number of pages13
JournalInternational Journal of Engine Research
Issue number8-9
StatePublished - Oct 1 2019
Externally publishedYes


  • aftertreatment thermal management
  • Cylinder deactivation
  • drivetrain resonance
  • dynamic cylinder activation
  • fuel economy
  • torsional vibrations
  • variable valve actuation

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Ocean Engineering
  • Mechanical Engineering


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