Influence of Operating Parameters on the Thermal Behavior and Energy Balance of an Automotive Diesel Engine

  • Christian Donn
  • Daniel Ghebru
  • Wolfgang Zulehner
  • Uwe Wagner
  • Ulrich Spicher
  • Matthias Honzen
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 190)

Abstract

The paper gives a comprehensive overview regarding all relevant operation parameters mainly influencing the energy balance of a state-of-the-art automotive Diesel engine. A detailed experimental analysis of the influence of injection timing and pressure, EGR rate, boost pressure, charge air temperature, coolant temperature and swirl flap position is presented. The investigation includes combustion chamber energy balances based on pressure trace analyses (internal energy balance) as well as outer energy balances that take into account all outgoing and incoming energy flows of the engine based on extensive temperature and flow measurements of the relevant fluids. Measurements of the engine structure temperatures are used to complete the analysis of the thermal engine behaviour depending on the operating parameters. The aim of the paper is to give an overview which operating parameters are crucial for thermal engine application and simulation.

Keywords

Diesel engine Thermal management Heat flow analysis Energy balance 

Nomenclature

Air

Intake air

ATDC

After top dead centre

Aux

Auxiliaries

BTDC

Before top dead centre

CA

Crank angle

CAC

Charge air cooler

CC

Combustion chamber

CO

Carbon monoxide

EGR

Exhaust gas recirculation

HC

Hydrocarbon

IMEPn

Net indicated mean effective pressure

MFB50 %

Mass fraction burned 50 %

MI

Main injection

PiI

Pilot injection

rpm

Revolutions per minute

SOI

Start of injection

TDC

Top dead centre

VTG

Variable turbine geometry

\( \alpha_{Gas} \)

Gas side heat transfer coefficient (W/(m2K))

\( \dot{H}_{Exh} \)

Exhaust gas enthalpy flow (kW)

\( m \)

Injected mass per cycle (mg)

\( n \)

Engine speed (rpm)

\( \dot{Q} \)

Heat flow (kW)

\( \dot{Q}_{in} \)

Input energy flow (kW)

\( P \)

Power (kW)

\( p_{cyl} \)

Cylinder pressure (bar)

\( T_{gas} \)

Gas temperature (°C)

References

  1. 1.
    Donn C, Zulehner W, Ghebru D, Spicher U, Honzen M (2011) Experimental heat flux analysis of an automotive diesel engine in steady-state operation and during warm-up, SAE technical paper no. 2011-24-0067Google Scholar
  2. 2.
    Hohenberg G (1979) Advanced approaches for heat transfer calculations, SAE technical paper no. 790825Google Scholar
  3. 3.
    Ghebru D, Donn C, Zulehner W, Kubach H, Wagner U, Puntigam W, Strasser K (2012) Vehicle warm-up analysis with experimental and co-simulation methods, FISITA world automotive congress 2012, BeijingGoogle Scholar
  4. 4.
    Zapf H (1968) Untersuchung des Wärmeüberganges in einem Viertakt-Dieselmotor während der Ansaug- und Ausschubphase. PhD-thesis, Technische Universitaet MuenchenGoogle Scholar
  5. 5.
    Bauder R, Bach M, Fröhlich A, Hatz W, Helbig J, Kahrstedt J (2010) The new generation of the audi 3.0 TDI engine—low emissions, powerful, fuel-efficient and lightweight, 31. International vienna motor symposium, AustriaGoogle Scholar
  6. 6.
    Pischinger R, Klell M, Sams T (2002) Thermodynamik der Verbrennungskraftmaschine. Springer, Wien, ISBN 3-211-83679-9Google Scholar
  7. 7.
    Smith LA, Preston WH, Dowd G, Taylor O, Wilkinson KM (2009) Application of a first law heat balance method to a turbocharged automotive diesel engine, SAE technical paper 2009-01-2744Google Scholar
  8. 8.
    Bargende M, Heinle M, Berner H-J (2011) Some useful additions to calculate the wall heat losses in real cycle simulations, 13th congress. D Graz, AustriaGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Christian Donn
    • 1
  • Daniel Ghebru
    • 1
  • Wolfgang Zulehner
    • 1
  • Uwe Wagner
    • 1
  • Ulrich Spicher
    • 1
  • Matthias Honzen
    • 2
  1. 1.Karlsruhe Institute of TechnologyInstitut fuer KolbenmaschinenKarlsruheGermany
  2. 2.Audi AGNeckarsulmGermany

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