Application of alternative EGR and VGT strategies to a Diesel Engine

R S Wijetunge, J G Hawley, N D Vaughan

Research output: Contribution to conferencePaperpeer-review

10 Citations (SciVal)


This paper describes the results of an investigation into alternative control strategies for diesel engines equipped with Exhaust Gas Recirculation (EGR) and Variable Geometry Turbocharging (VGT). The objectives of the research were to improve the engine aircharge performance during transient maneuvers, thus bringing benefits for fuel economy, exhaust emissions and engine transient performance. Two of the investigated areas are detailed in this paper: The coordinated control of the EGR-VGT systems to improve transient airflow at low-speed, low-load operation; Transient VGT control using exhaust pressure feedback. A simple and effective method for coordinating the EGR-VGT system is demonstrated to improve airflow response to tip-ins and tip-outs. The exhaust pressure feedback method is shown to overcome difficulties in the transient control of VGT systems, offering improved engine torque response and reduced transient backpressure.
Original languageEnglish
Publication statusPublished - 2004
EventSAE 2004 World Congress and Exhibition - Detroit, MI, USA United States
Duration: 8 Mar 200411 Mar 2004


ConferenceSAE 2004 World Congress and Exhibition
Country/TerritoryUSA United States
CityDetroit, MI

Bibliographical note

SAE Technical Paper 2004-01-0899


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