Variable Compression Ratio with Mark McVea

William Mark McVea is president and principal engineer of KBE+, Inc. He holds a PhD in Design Engineering from Purdue University's Automotive Sciences Department.

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Learning Objectives:

• Understand the Variable Compression Ratio (VCR) technology can be implemented in common engine designs and with typical hardware

• Appreciate that varying the compression ratio is only mechanism to vary the in-cylinder temperature, prior to ignition, which in turn optimizes the thermal conversion of the internal combustion engine

• Realize that through VCR technology the full potential of the modern IC engine can be realized “on-the-fly”, under typical engine control strategies

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References:

• “Variable Compression Ratio Engine:  A Future power Plant For Automobiles – An Overview”, Amjad Shaik, N. Shenbaga Vinayaga, Moorthi, and R.Rudramoorthy, Department of Automobile Engineering, PSG College of Technology, Peelamedu, Coimbatore, India, Proceedings IMechE Vol. 221, Part D:  Journal of Automobile Engineering, JAUTO573  IMechE 2007, Pg. 1157 – 1167, DOI:  10.1243/09544070AUTO573.

• “HCCI in a Variable Compression Ratio Engine - Effects of Engine Variables”, Document Number: 2004-01-1971, Date Published: June 2004, Thomas W. Ryan III - Southwest Research Institute, Timothy J. Callahan - Southwest Research Institute, Darius Mehta - Southwest Research Institute.