Electric Turbo Assist as an enabler for engine downspeeding

Aaron W. Costall, Radoslav Ivanov, Thomas P.F. Langley

Research output: Chapter or section in a book/report/conference proceedingChapter in a published conference proceeding

9 Citations (SciVal)


Electric Turbo Assist (ETA) is a novel air system technology that provides an extra degree of freedom in engine-turbocharger matching for optimal system performance and emissions. This paper presents simulation results from a research project to develop and demonstrate ETA, an integrated turbocharger-motor/generator, for a particular off-road machine duty cycle. Engine cycle simulation tools have been employed to investigate the potential of ETA to reduce fuel consumption through a combined downspeeding and exhaust energy regeneration strategy while meeting the required emissions levels and maintaining the desired engine response. Results show that ETA enables a flexible air system that can meet and even exceed the required air-fuel ratio and exhaust gas recirculation targets when the engine is downspeeded, while providing a useful fuel saving over the non-ETA baseline engine calibration.

Original languageEnglish
Title of host publicationASME Turbo Expo 2012
Subtitle of host publicationTurbine Technical Conference and Exposition, GT 2012
Number of pages11
Publication statusPublished - 2012
EventASME Turbo Expo 2012: Turbine Technical Conference and Exposition, GT 2012 - Copenhagen, Denmark
Duration: 11 Jun 201215 Jun 2012

Publication series

NameProceedings of the ASME Turbo Expo


ConferenceASME Turbo Expo 2012: Turbine Technical Conference and Exposition, GT 2012

ASJC Scopus subject areas

  • Engineering(all)


Dive into the research topics of 'Electric Turbo Assist as an enabler for engine downspeeding'. Together they form a unique fingerprint.

Cite this