Performance and emission enhancements of a variable geometry turbocharger on a heavy-duty diesel engine
by Timothy J. Jacobs, Chad Jagmin, Wesley J. Williamson, Zoran S. Filipi, Dennis N. Assanis, Walter Bryzik
International Journal of Heavy Vehicle Systems (IJHVS), Vol. 15, No. 2/3/4, 2008

Abstract: Variable Geometry Turbochargers (VGTs) have emerged in the heavy-duty diesel market with the simultaneous introduction of Exhaust Gas Recirculation (EGR) in meeting emission standards. From a military perspective, VGTs offer considerable promise of improving low speed torque and overall fuel economy. Despite these gains, nitric oxides (NO_x) emissions generally increase with increased boost. During times when the military can reduce its environmental impact, VGTs can drive EGR and counter the increase in NO_x emissions with relatively minor penalty in particulate matter (PM) emissions. This study highlights the performance and emission enhancements enabled by a VGT on a heavy-duty diesel engine.

Online publication date: Wed, 24-Dec-2008

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