0
TECHNICAL PAPERS: Internal Combustion Engines

An Analysis of Turbocharged Diesel Engine Dynamic Response Improvement by Electric Assisting Systems

[+] Author and Article Information
Tomaž Katrašnik

Department of Mechanical Engineering,  University of Ljubljana, Aškerčeva 6, SI-1000 Ljubljana, Sloveniatomaz.katrasnik@fs.uni-lj.si

Ferdinand Trenc

Department of Mechanical Engineering,  University of Ljubljana, Aškerčeva 6, SI-1000 Ljubljana, Slovenia

Vladimir Medica

Faculty of Engineering, University of Rijeka, Vukovarska 58, 51000 Rijeka, Croatia

Stojan Markič

 Iskra Avtoelektrika d.d.-R&D, SI-5290 Šempeter pri Gorici, Slovenia

J. Eng. Gas Turbines Power 127(4), 918-926 (Jul 23, 2004) (9 pages) doi:10.1115/1.1924533 History: Received November 10, 2003; Revised July 23, 2004

It is well known that turbocharged diesel engines suffer from an inadequate response to sudden load increase, this being a consequence of the nature of the energy exchange between the engine and the turbocharger. The dynamic response of turbocharged diesel engines could be improved by electric assisting systems, either by direct energy supply with an integrated starter-generator-booster (ISG) mounted on the engine flywheel, or indirect energy supply with an electrically assisted turbocharger. A previously verified zero dimensional computer simulation method was used for the analysis of both types of electrical assistance. The credibility of the data presented is further assured by the experimentally determined characteristics of the electric motors used as input parameters of the simulation. The paper offers an analysis of the interaction between a turbocharged diesel engine operating under various load conditions and electric assisting systems, as well as the requirements for supporting electric motors suitable for the improvement of an engine’s dynamic response. It is evident that an electrically assisted turbocharger outperforms an integrated starter-generator-booster for vehicle application, however ISG is the preferred solution when instant power increase is demanded.

FIGURES IN THIS ARTICLE
<>
Copyright © 2005 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

LDA characteristics

Grahic Jump Location
Figure 2

Fuel injection pump characteristics

Grahic Jump Location
Figure 3

ISG characteristic

Grahic Jump Location
Figure 4

Vehicle acceleration in fifth gear

Grahic Jump Location
Figure 5

Boost pressure vs engine speed for acceleration in different gears

Grahic Jump Location
Figure 6

Vehicle acceleration in third gear

Grahic Jump Location
Figure 7

Vehicle acceleration in sixth gear

Grahic Jump Location
Figure 8

Dynamic response improvement of the baseline TC diesel engine by electric assisting systems for accelerations in different gears (II–IV gear)

Grahic Jump Location
Figure 9

Driving case: 0° road inclination to 3.5° road inclination in sixth gear

Grahic Jump Location
Figure 10

Influence of EM mass moment of inertia at the same power density on dynamic response improvement of the baseline TC diesel engine

Grahic Jump Location
Figure 11

Influence of maximum angular acceleration of EM at JEM=6×10−5 on dynamic response improvement of the baseline TC diesel engine

Grahic Jump Location
Figure 12

Influence of maximum torque output of the ISG on dynamic response improvement of the baseline TC diesel engine

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In