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Investigation of Small Pilot Combustion in a Heavy-Duty Diesel Engine

Jorques Moreno, Carlos LU ; Stenlaas, Ola and Tunestal, Per LU (2017) In SAE International Journal of Engines 10(3).
Abstract

Factors influencing pilot-injection combustion were investigated using heat release analysis in a heavy-duty diesel engine fuelled with standard diesel fuel. Combinations of pilot-injection parameters i.e. pilot start of injection, pilot mass, pilot-main injection separation, and rail pressure were studied for various operating conditions and combustion phases. An experiment was designed to investigate the factors influencing the combustion of the pilot. For improved injected fuel-mass accuracy, reference data for the injectors were measured in a spray rig prior to the engine experiments. Results show that cycle-to-cycle variations and cylinder-to-cylinder variations influence pilot autoignition and the amount of heat released. Rail... (More)

Factors influencing pilot-injection combustion were investigated using heat release analysis in a heavy-duty diesel engine fuelled with standard diesel fuel. Combinations of pilot-injection parameters i.e. pilot start of injection, pilot mass, pilot-main injection separation, and rail pressure were studied for various operating conditions and combustion phases. An experiment was designed to investigate the factors influencing the combustion of the pilot. For improved injected fuel-mass accuracy, reference data for the injectors were measured in a spray rig prior to the engine experiments. Results show that cycle-to-cycle variations and cylinder-to-cylinder variations influence pilot autoignition and the amount of heat released. Rail pressure and injected pilot mass affect the obtained variance depending on the chamber conditions. The obtained combustion modes (premixed, diffusive) of pilot combustion were found to be a function of the injected mass and rail pressure.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
SAE International Journal of Engines
volume
10
issue
3
publisher
SAE
external identifiers
  • scopus:85018319669
  • wos:000408255500041
ISSN
1946-3936
DOI
10.4271/2017-01-0718
language
English
LU publication?
yes
id
215918ac-5aa0-4b53-b515-d81323f80059
date added to LUP
2017-05-22 09:33:56
date last changed
2018-04-29 04:38:57
@article{215918ac-5aa0-4b53-b515-d81323f80059,
  abstract     = {<p>Factors influencing pilot-injection combustion were investigated using heat release analysis in a heavy-duty diesel engine fuelled with standard diesel fuel. Combinations of pilot-injection parameters i.e. pilot start of injection, pilot mass, pilot-main injection separation, and rail pressure were studied for various operating conditions and combustion phases. An experiment was designed to investigate the factors influencing the combustion of the pilot. For improved injected fuel-mass accuracy, reference data for the injectors were measured in a spray rig prior to the engine experiments. Results show that cycle-to-cycle variations and cylinder-to-cylinder variations influence pilot autoignition and the amount of heat released. Rail pressure and injected pilot mass affect the obtained variance depending on the chamber conditions. The obtained combustion modes (premixed, diffusive) of pilot combustion were found to be a function of the injected mass and rail pressure.</p>},
  author       = {Jorques Moreno, Carlos and Stenlaas, Ola and Tunestal, Per},
  issn         = {1946-3936},
  language     = {eng},
  month        = {03},
  number       = {3},
  publisher    = {SAE},
  series       = {SAE International Journal of Engines},
  title        = {Investigation of Small Pilot Combustion in a Heavy-Duty Diesel Engine},
  url          = {http://dx.doi.org/10.4271/2017-01-0718},
  volume       = {10},
  year         = {2017},
}