Advanced

Optical Diagnostics of HCCI and UNIBUS Using 2-D PLIF of OH and Formaldehyde

Hildingsson, Leif LU ; Persson, Håkan LU ; Johansson, Bengt LU ; Collin, Robert LU ; Nygren, Jenny LU ; Richter, Mattias LU ; Aldén, Marcus LU ; Hasegawa, Ryo and Yanagihara, Hiromichi (2005) In SAE technical paper series
Abstract
Simultaneous OH- and formaldehyde planar-LIF measurements have been performed in an optical engine using two laser sources working on 283 and 355 nm, respectively. The measurements were performed in a light- duty diesel engine, using n-heptane as fuel, converted to single- cylinder operation and modified for optical access. It was also equipped with a direct-injection, common-rail system as well as an EGR system.



The engine was operated in both HCCI mode, using a single fuel injection, and UNIBUS (Uniform Bulky Combustion System) mode, using two injections of fuel with one of the injections at 50 CAD before TDC and the other one just before TDC.



The OH and formaldehyde LIF images were compared with... (More)
Simultaneous OH- and formaldehyde planar-LIF measurements have been performed in an optical engine using two laser sources working on 283 and 355 nm, respectively. The measurements were performed in a light- duty diesel engine, using n-heptane as fuel, converted to single- cylinder operation and modified for optical access. It was also equipped with a direct-injection, common-rail system as well as an EGR system.



The engine was operated in both HCCI mode, using a single fuel injection, and UNIBUS (Uniform Bulky Combustion System) mode, using two injections of fuel with one of the injections at 50 CAD before TDC and the other one just before TDC.



The OH and formaldehyde LIF images were compared with the heat- release calculated from the pressure-traces. Analyses of the emissions, for example NOx and HC, were also performed for the different operating conditions. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Combustion Engines optical diagnostics Formaldehyde
in
SAE technical paper series
publisher
Society of Automotive Engineers
external identifiers
  • scopus:79961041826
language
English
LU publication?
yes
id
906ed13d-3203-4fab-a312-cdfd77d16ebf (old id 742343)
date added to LUP
2007-12-13 12:07:48
date last changed
2017-03-26 04:33:11
@article{906ed13d-3203-4fab-a312-cdfd77d16ebf,
  abstract     = {Simultaneous OH- and formaldehyde planar-LIF measurements have been performed in an optical engine using two laser sources working on 283 and 355 nm, respectively. The measurements were performed in a light- duty diesel engine, using n-heptane as fuel, converted to single- cylinder operation and modified for optical access. It was also equipped with a direct-injection, common-rail system as well as an EGR system. <br/><br>
<br/><br>
The engine was operated in both HCCI mode, using a single fuel injection, and UNIBUS (Uniform Bulky Combustion System) mode, using two injections of fuel with one of the injections at 50 CAD before TDC and the other one just before TDC. <br/><br>
<br/><br>
The OH and formaldehyde LIF images were compared with the heat- release calculated from the pressure-traces. Analyses of the emissions, for example NOx and HC, were also performed for the different operating conditions.},
  author       = {Hildingsson, Leif and Persson, Håkan and Johansson, Bengt and Collin, Robert and Nygren, Jenny and Richter, Mattias and Aldén, Marcus and Hasegawa, Ryo and Yanagihara, Hiromichi},
  keyword      = {Combustion Engines optical diagnostics Formaldehyde},
  language     = {eng},
  publisher    = {Society of Automotive Engineers},
  series       = {SAE technical paper series},
  title        = {Optical Diagnostics of HCCI and UNIBUS Using 2-D PLIF of OH and Formaldehyde},
  year         = {2005},
}