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Crank Angle Resolved HC Detection Using LIF in the Exhausts of Small Two-Stroke Engines Running at High Engine Speed

Andersson, Öivind; Juhlin, Greger; Ekenberg, Martin LU ; Johansson, Bengt LU and Aldén, Marcus LU (1996) In SAE Transactions, Journal of Engines 105(961927).
Abstract
In order to separate the HC-emissions from two-stroke engines into short-circuit losses and emissions due to incomplete combustion, Laser Induced Fluorescence (LIF) measurements were performed on the exhaust gases just outside the exhaust ports of two engines of different designs.



The difference between the two engines was the design of the transfer channels. One engine had "finger" transfer channels and one had "cup handle" transfer channels. Apart from that they were similar. The engine with "finger" transfer channels was earlier known to give more short-circuiting losses than the other engine, and that behavior was confirmed by these measurements.



Generally, the results show that the emission of... (More)
In order to separate the HC-emissions from two-stroke engines into short-circuit losses and emissions due to incomplete combustion, Laser Induced Fluorescence (LIF) measurements were performed on the exhaust gases just outside the exhaust ports of two engines of different designs.



The difference between the two engines was the design of the transfer channels. One engine had "finger" transfer channels and one had "cup handle" transfer channels. Apart from that they were similar. The engine with "finger" transfer channels was earlier known to give more short-circuiting losses than the other engine, and that behavior was confirmed by these measurements.



Generally, the results show that the emission of hydrocarbons has two peaks, one just after exhaust port opening and one late in the scavenging phase.



The spectral information shows differences between the two peaks and it can be concluded that the latter peak is due to short-circuiting and the earlier due to incomplete combustion.



The flow outside the exhaust port was measured with Laser Doppler Velocimetry (LDV). These measurements confirm the occurrence of two emission peaks. (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
Two-Stroke, Hydrocarbon, LIF, Combustion, Engine
in
SAE Transactions, Journal of Engines
volume
105
issue
961927
publisher
Society of Automotive Engineers
external identifiers
  • scopus:84877445795
ISSN
0096-736X
language
English
LU publication?
yes
id
8709bb9d-889f-4f08-be1e-d347109d4c25 (old id 164435)
alternative location
http://www.sae.org/technical/papers/961927
date added to LUP
2007-06-27 09:57:47
date last changed
2017-01-01 07:10:28
@article{8709bb9d-889f-4f08-be1e-d347109d4c25,
  abstract     = {In order to separate the HC-emissions from two-stroke engines into short-circuit losses and emissions due to incomplete combustion, Laser Induced Fluorescence (LIF) measurements were performed on the exhaust gases just outside the exhaust ports of two engines of different designs.<br/><br>
<br/><br>
The difference between the two engines was the design of the transfer channels. One engine had "finger" transfer channels and one had "cup handle" transfer channels. Apart from that they were similar. The engine with "finger" transfer channels was earlier known to give more short-circuiting losses than the other engine, and that behavior was confirmed by these measurements.<br/><br>
<br/><br>
Generally, the results show that the emission of hydrocarbons has two peaks, one just after exhaust port opening and one late in the scavenging phase. <br/><br>
<br/><br>
The spectral information shows differences between the two peaks and it can be concluded that the latter peak is due to short-circuiting and the earlier due to incomplete combustion.<br/><br>
<br/><br>
The flow outside the exhaust port was measured with Laser Doppler Velocimetry (LDV). These measurements confirm the occurrence of two emission peaks.},
  author       = {Andersson, Öivind and Juhlin, Greger and Ekenberg, Martin and Johansson, Bengt and Aldén, Marcus},
  issn         = {0096-736X},
  keyword      = {Two-Stroke,Hydrocarbon,LIF,Combustion,Engine},
  language     = {eng},
  number       = {961927},
  publisher    = {Society of Automotive Engineers},
  series       = {SAE Transactions, Journal of Engines},
  title        = {Crank Angle Resolved HC Detection Using LIF in the Exhausts of Small Two-Stroke Engines Running at High Engine Speed},
  volume       = {105},
  year         = {1996},
}