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Lift-Off Lengths in an Optical Heavy-Duty Engine Operated at High Load with Low and High Octane Number Fuels

Lundgren, Marcus LU ; Matamis, Alexios LU orcid ; Wang, Zhenkan LU ; Garcia Valladolid, Pablo LU ; Richter, Mattias LU ; Andersson, Oivind LU and Andersson, Arne (2018) In SAE Technical Papers 2018-April.
Abstract

The influence of the ignition quality of diesel-and gasoline-like fuels on the lift-off length of the jet were investigated in an optical heavy duty engine. The engine was operated at a load of 22 bar IMEPg and 1200 rpm. A production type injector with standard holes were used. The lift-off length was recorded with high speed video Different injection pressures and inlet temperatures were used to affect conditions that consequently affect the lift-off length. No matter which fuel used nor injection pressure or inlet temperature, all lift-off lengths showed equal or close to equal lift-off length when stabilized. The higher octane fuel had a longer ignition delay and therefore the fuel penetrate the combustion chamber before... (More)

The influence of the ignition quality of diesel-and gasoline-like fuels on the lift-off length of the jet were investigated in an optical heavy duty engine. The engine was operated at a load of 22 bar IMEPg and 1200 rpm. A production type injector with standard holes were used. The lift-off length was recorded with high speed video Different injection pressures and inlet temperatures were used to affect conditions that consequently affect the lift-off length. No matter which fuel used nor injection pressure or inlet temperature, all lift-off lengths showed equal or close to equal lift-off length when stabilized. The higher octane fuel had a longer ignition delay and therefore the fuel penetrate the combustion chamber before auto ignition. This gave a longer lift-off length at the initial stage of combustion before reaching the same stabilized lift-off length. These results indicate that the hot combustion gases are a dominant factor to the lift-off length. Also, that possible soot reductions using high octanes fuels are feasible because of a longer ignition delay that allow more premixing, and an initially longer lift-off length due to longer penetration into the combustion chamber.

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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
SAE Technical Papers
volume
2018-April
publisher
Society of Automotive Engineers
external identifiers
  • scopus:85045422499
ISSN
0148-7191
DOI
10.4271/2018-01-0245
language
English
LU publication?
yes
id
7f18c1d3-9ab2-4c63-aa94-ebfbc1d771d8
date added to LUP
2018-04-24 15:22:53
date last changed
2022-04-01 23:55:35
@article{7f18c1d3-9ab2-4c63-aa94-ebfbc1d771d8,
  abstract     = {{<p>The influence of the ignition quality of diesel-and gasoline-like fuels on the lift-off length of the jet were investigated in an optical heavy duty engine. The engine was operated at a load of 22 bar IMEP<sub>g</sub> and 1200 rpm. A production type injector with standard holes were used. The lift-off length was recorded with high speed video Different injection pressures and inlet temperatures were used to affect conditions that consequently affect the lift-off length. No matter which fuel used nor injection pressure or inlet temperature, all lift-off lengths showed equal or close to equal lift-off length when stabilized. The higher octane fuel had a longer ignition delay and therefore the fuel penetrate the combustion chamber before auto ignition. This gave a longer lift-off length at the initial stage of combustion before reaching the same stabilized lift-off length. These results indicate that the hot combustion gases are a dominant factor to the lift-off length. Also, that possible soot reductions using high octanes fuels are feasible because of a longer ignition delay that allow more premixing, and an initially longer lift-off length due to longer penetration into the combustion chamber.</p>}},
  author       = {{Lundgren, Marcus and Matamis, Alexios and Wang, Zhenkan and Garcia Valladolid, Pablo and Richter, Mattias and Andersson, Oivind and Andersson, Arne}},
  issn         = {{0148-7191}},
  language     = {{eng}},
  month        = {{01}},
  publisher    = {{Society of Automotive Engineers}},
  series       = {{SAE Technical Papers}},
  title        = {{Lift-Off Lengths in an Optical Heavy-Duty Engine Operated at High Load with Low and High Octane Number Fuels}},
  url          = {{http://dx.doi.org/10.4271/2018-01-0245}},
  doi          = {{10.4271/2018-01-0245}},
  volume       = {{2018-April}},
  year         = {{2018}},
}