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CFD Investigation on Injection Strategy and Gasoline Quality Impact on In-Cylinder Temperature Distribution and Heat Transfer in PPC

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Author

Summary, in English

Recently, internal combustion engine design has been moving towards downsized, more efficient engines. One key in designing a more efficient engine is the control of heat losses, i.e., improvements of the thermodynamic cycle. Therefore, there is increasing interest in examining and documenting the heat transfer process of an internal combustion engine. A heavy-duty diesel engine was modeled with a commercial CFD code in order to examine the effects of two different gasoline fuels, and the injection strategy used, on heat transfer within the engine cylinder in a partially premixed combustion (PPC) mode. The investigation on the fuel quality and injection strategy indicates that the introduction of a pilot injection is more beneficial in order to lower heat transfer, than adjusting the fuel quality. This is due to reduced wall exposure to higher temperature gases and more equally distributed heat losses in the combustion chamber. A comparison was also made between two loads with the same fuel quality and injection strategy, which revealed that even though the relative heat load to the walls was higher in the lower load case, the gross indicated efficiency was higher, due to a lower value of the

exhaust energy.

Publishing year

2013

Language

English

Publication/Series

[Host publication title missing]

Document type

Conference paper

Publisher

SAE

Topic

  • Energy Engineering

Keywords

  • CFD
  • Heat Transfer
  • PPC Engine
  • Injection Strategy
  • Gasoline Quality

Conference name

ICE2013 - 11th International Conference on Engine & Vehicles

Conference date

2013-09-18

Conference place

Capri, Napoli, Italy

Status

Published

ISBN/ISSN/Other

  • SAE Technical Paper 2013-24-0009