Optical diagnostics of HCCI and UNIBUS Using 2-D PLIF of OH and formaldehyde

Leif Hildingsson; Hakan Persson; Bengt Johansson; Robert Collin; Jenny Nygren; Mattias Richter; Marcus Aldén; Ryo Hasegawa; Hiromichi Yanagihara

doi:10.4271/2005-01-0175

Optical diagnostics of HCCI and UNIBUS Using 2-D PLIF of OH and formaldehyde

Leif Hildingsson^*, Hakan Persson, Bengt Johansson, Robert Collin, Jenny Nygren, Mattias Richter, Marcus Aldén, Ryo Hasegawa, Hiromichi Yanagihara

^*Corresponding author for this work

Physical Sciences and Engineering

Research output: Contribution to conference › Paper › peer-review

23 Scopus citations

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 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.

Original language	English (US)
DOIs	https://doi.org/10.4271/2005-01-0175
State	Published - Dec 1 2005
Event	2005 SAE World Congress - Detroit, MI, United States Duration: Apr 11 2005 → Apr 14 2005

Other

Other	2005 SAE World Congress
Country/Territory	United States
City	Detroit, MI
Period	04/11/05 → 04/14/05

ASJC Scopus subject areas

Automotive Engineering
Safety, Risk, Reliability and Quality
Pollution
Industrial and Manufacturing Engineering

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title = "Optical diagnostics of HCCI and UNIBUS Using 2-D PLIF of OH and formaldehyde",

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 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.",

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language = "English (US)",

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T1 - Optical diagnostics of HCCI and UNIBUS Using 2-D PLIF of OH and formaldehyde

AU - Hildingsson, Leif

AU - Persson, Hakan

AU - Johansson, Bengt

AU - Collin, Robert

AU - Nygren, Jenny

AU - Richter, Mattias

AU - Aldén, Marcus

AU - Hasegawa, Ryo

AU - Yanagihara, Hiromichi

PY - 2005/12/1

Y1 - 2005/12/1

N2 - 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.

AB - 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.

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ER -

Optical diagnostics of HCCI and UNIBUS Using 2-D PLIF of OH and formaldehyde

Abstract

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