Effect of high levels of boost and recirculated exhaust gas on diesel combustion characteristics at part load

Venkatesh Gopalakrishnan, Alberto Vassallo, Richard C. Peterson, Joaquin De La Morena

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Future diesel combustion systems may operate with significantly higher levels of boost and EGR than used with present systems. The potential benefits of higher boost and EGR were studied experimentally in a single-cylinder diesel engine with capability to adjust these parameters independently. The objective was to study the intake and exhaust conditions with a more optimum combustion phasing to minimize fuel consumption while maintaining proper constraints on emissions and combustion noise. The engine was tested at four part-load operating points using a Design of Experiments (DOE) approach. Two of the operating points correspond to low-speed and low-load conditions relevant for the New European Driving Cycle (NEDC). The other two points focus on medium load conditions representative of the World-wide harmonized Light-duty Test Procedures (WLTP). For the NEDC relevant conditions, improved fuel consumption was not achievable due to combustion noise constraints and the requirement for a very high turbocharger efficiency improvement of more than 20%. For the WLTP points, the Net Specific Fuel Consumption (NSFC) was improved by 11-12% with higher boost and EGR and improved combustion phasing while meeting Eu6 emission and noise constraints. The air flow and pressures for the WLTP points may be possible with next generation boosting systems.

Original languageEnglish
Title of host publicationSAE 2014 World Congress and Exhibition
PublisherSAE International
Volume1
DOIs
Publication statusPublished - 2014
EventSAE 2014 World Congress and Exhibition - Detroit, MI, United States
Duration: 08-04-201410-04-2014

Conference

ConferenceSAE 2014 World Congress and Exhibition
CountryUnited States
CityDetroit, MI
Period08-04-1410-04-14

Fingerprint

Exhaust gases
Fuel consumption
Acoustic noise
Engine cylinders
Design of experiments
Diesel engines
Engines
Air

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

Cite this

Gopalakrishnan, V., Vassallo, A., Peterson, R. C., & De La Morena, J. (2014). Effect of high levels of boost and recirculated exhaust gas on diesel combustion characteristics at part load. In SAE 2014 World Congress and Exhibition (Vol. 1). SAE International. https://doi.org/10.4271/2014-01-1245
Gopalakrishnan, Venkatesh ; Vassallo, Alberto ; Peterson, Richard C. ; De La Morena, Joaquin. / Effect of high levels of boost and recirculated exhaust gas on diesel combustion characteristics at part load. SAE 2014 World Congress and Exhibition. Vol. 1 SAE International, 2014.
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Gopalakrishnan, V, Vassallo, A, Peterson, RC & De La Morena, J 2014, Effect of high levels of boost and recirculated exhaust gas on diesel combustion characteristics at part load. in SAE 2014 World Congress and Exhibition. vol. 1, SAE International, SAE 2014 World Congress and Exhibition, Detroit, MI, United States, 08-04-14. https://doi.org/10.4271/2014-01-1245

Effect of high levels of boost and recirculated exhaust gas on diesel combustion characteristics at part load. / Gopalakrishnan, Venkatesh; Vassallo, Alberto; Peterson, Richard C.; De La Morena, Joaquin.

SAE 2014 World Congress and Exhibition. Vol. 1 SAE International, 2014.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Gopalakrishnan V, Vassallo A, Peterson RC, De La Morena J. Effect of high levels of boost and recirculated exhaust gas on diesel combustion characteristics at part load. In SAE 2014 World Congress and Exhibition. Vol. 1. SAE International. 2014 https://doi.org/10.4271/2014-01-1245