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Combustion Stratification with Partially Premixed Combustion, PPC, using NVO and Split Injection in a LD - Diesel Engine

Tanov, Slavey LU ; Collin, Robert LU ; Johansson, Bengt LU and Tunér, Martin LU (2014) In SAE International Journal of Engines 7(4). p.1911-1919
Abstract
Partially Premixed Combustion (PPC) is used to meet the increasing demands of emission legislation and to improve fuel efficiency. PPC with gasoline fuels have the advantage of a longer premixed duration of fuel/air mixture which prevents soot formation at higher loads.



The objective of this paper is to investigate the degree of stratification for low load (towards idle) engine conditions using different injection strategies and negative valve overlap (NVO). The question is, how homogenous or stratified is the partially premixed combustion (PPC) for a given setting of NVO and fuel injection strategy. In this work PRF 55 has been used as PPC fuel.



The experimental engine is a light duty (LD) diesel... (More)
Partially Premixed Combustion (PPC) is used to meet the increasing demands of emission legislation and to improve fuel efficiency. PPC with gasoline fuels have the advantage of a longer premixed duration of fuel/air mixture which prevents soot formation at higher loads.



The objective of this paper is to investigate the degree of stratification for low load (towards idle) engine conditions using different injection strategies and negative valve overlap (NVO). The question is, how homogenous or stratified is the partially premixed combustion (PPC) for a given setting of NVO and fuel injection strategy. In this work PRF 55 has been used as PPC fuel.



The experimental engine is a light duty (LD) diesel engine that has been modified to single cylinder operation to provide optical access into the combustion chamber, equipped with a fully variable valve train system. Hot residual gases were trapped by using NVO to dilute the cylinder mixture. Optical measurements were carried out for OH chemiluminescence imaging to track sequentially the combustion process and to analyse the degree of stratification. Initial results show that the combustion with triple injection is more homogenous compared to single and double injection. Furthermore the results show that the 55 octane number fuel can be operated at low load condition with the lowest NVO used, 60 CAD. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
SAE International Journal of Engines
volume
7
issue
4
pages
1911 - 1919
publisher
SAE
external identifiers
  • other:2014-01-2677
  • scopus:84953873676
ISSN
1946-3944
DOI
10.4271/2014-01-2677
language
English
LU publication?
yes
id
7bb06831-a71c-4cfd-a163-229c4f2a7ead (old id 4936230)
date added to LUP
2015-01-19 14:12:44
date last changed
2017-10-22 03:29:10
@article{7bb06831-a71c-4cfd-a163-229c4f2a7ead,
  abstract     = {Partially Premixed Combustion (PPC) is used to meet the increasing demands of emission legislation and to improve fuel efficiency. PPC with gasoline fuels have the advantage of a longer premixed duration of fuel/air mixture which prevents soot formation at higher loads.<br/><br>
<br/><br>
The objective of this paper is to investigate the degree of stratification for low load (towards idle) engine conditions using different injection strategies and negative valve overlap (NVO). The question is, how homogenous or stratified is the partially premixed combustion (PPC) for a given setting of NVO and fuel injection strategy. In this work PRF 55 has been used as PPC fuel.<br/><br>
<br/><br>
The experimental engine is a light duty (LD) diesel engine that has been modified to single cylinder operation to provide optical access into the combustion chamber, equipped with a fully variable valve train system. Hot residual gases were trapped by using NVO to dilute the cylinder mixture. Optical measurements were carried out for OH chemiluminescence imaging to track sequentially the combustion process and to analyse the degree of stratification. Initial results show that the combustion with triple injection is more homogenous compared to single and double injection. Furthermore the results show that the 55 octane number fuel can be operated at low load condition with the lowest NVO used, 60 CAD.},
  author       = {Tanov, Slavey and Collin, Robert and Johansson, Bengt and Tunér, Martin},
  issn         = {1946-3944},
  language     = {eng},
  number       = {4},
  pages        = {1911--1919},
  publisher    = {SAE},
  series       = {SAE International Journal of Engines},
  title        = {Combustion Stratification with Partially Premixed Combustion, PPC, using NVO and Split Injection in a LD - Diesel Engine},
  url          = {http://dx.doi.org/10.4271/2014-01-2677},
  volume       = {7},
  year         = {2014},
}