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Partially Premixed Combustion at High Load using Gasoline and Ethanol, a Comparison with Diesel

Manente, Vittorio LU ; Johansson, Bengt LU and Tunestål, Per LU (2009) SAE World Congress, 2009 In SAE Technical Paper Series 2009-01-0944.
Abstract
This paper is the follow up of a previous work and its target is to demonstrate that the best fuel for a Compression Ignition engine has to be with high Octane Number.

An advanced injection strategy was designed in order to run Gasoline in a CI engine. At high load it consisted in injecting 54 % of the fuel very early in the pilot and the remaining around TDC; the second injection is used as ignition trigger and an appropriate amount of cool EGR has to be used in order to avoid pre-ignition of the pilot. Substantially lower NOx, soot and specific fuel consumption were achieved at 16.56 bar gross IMEP as compared to Diesel. The pressure rise rate did not constitute any problem thanks to the stratification created by the main... (More)
This paper is the follow up of a previous work and its target is to demonstrate that the best fuel for a Compression Ignition engine has to be with high Octane Number.

An advanced injection strategy was designed in order to run Gasoline in a CI engine. At high load it consisted in injecting 54 % of the fuel very early in the pilot and the remaining around TDC; the second injection is used as ignition trigger and an appropriate amount of cool EGR has to be used in order to avoid pre-ignition of the pilot. Substantially lower NOx, soot and specific fuel consumption were achieved at 16.56 bar gross IMEP as compared to Diesel. The pressure rise rate did not constitute any problem thanks to the stratification created by the main injection and a partial overlap between start of the combustion and main injection. Ethanol gave excellent results too; with this fuel the maximum load was limited at 14.80 bar gross IMEP because of hardware issues.



Applying the commonly used PPC injection strategies to Gasoline resulted in higher pressure oscillations after combustion and the heat transfer was enhanced. It was shown that this problem can be somehow solved by employing a late pilot injection, unfortunately the combustion is diffusion controlled and there is an increase in fuel consumption as compared to the strategy previously described.



The viability of having low fuel consumption, NOx, soot and pressure rise rate using high ON fuels in a CI engine was demonstrated using a Scania single cylinder truck engine with 2 liters displacement volume running at 1100 rpm. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Internal Combustion Engines, Partially Premixed Combustion, Compression Ignition
in
SAE Technical Paper Series
volume
2009-01-0944
publisher
Society of Automotive Engineers
conference name
SAE World Congress, 2009
external identifiers
  • scopus:80054815064
ISSN
0148-7191
DOI
10.4271/2009-01-0944
language
English
LU publication?
yes
id
bb1e3e54-6ea3-4829-94f8-7c2cfe173269 (old id 1395924)
alternative location
http://papers.sae.org/2009-01-0944/
date added to LUP
2014-02-24 13:30:13
date last changed
2017-12-10 04:17:37
@inproceedings{bb1e3e54-6ea3-4829-94f8-7c2cfe173269,
  abstract     = {This paper is the follow up of a previous work and its target is to demonstrate that the best fuel for a Compression Ignition engine has to be with high Octane Number.<br/><br>
An advanced injection strategy was designed in order to run Gasoline in a CI engine. At high load it consisted in injecting 54 % of the fuel very early in the pilot and the remaining around TDC; the second injection is used as ignition trigger and an appropriate amount of cool EGR has to be used in order to avoid pre-ignition of the pilot. Substantially lower NOx, soot and specific fuel consumption were achieved at 16.56 bar gross IMEP as compared to Diesel. The pressure rise rate did not constitute any problem thanks to the stratification created by the main injection and a partial overlap between start of the combustion and main injection. Ethanol gave excellent results too; with this fuel the maximum load was limited at 14.80 bar gross IMEP because of hardware issues.<br/><br>
<br/><br>
Applying the commonly used PPC injection strategies to Gasoline resulted in higher pressure oscillations after combustion and the heat transfer was enhanced. It was shown that this problem can be somehow solved by employing a late pilot injection, unfortunately the combustion is diffusion controlled and there is an increase in fuel consumption as compared to the strategy previously described.<br/><br>
<br/><br>
The viability of having low fuel consumption, NOx, soot and pressure rise rate using high ON fuels in a CI engine was demonstrated using a Scania single cylinder truck engine with 2 liters displacement volume running at 1100 rpm.},
  author       = {Manente, Vittorio and Johansson, Bengt and Tunestål, Per},
  booktitle    = {SAE Technical Paper Series},
  issn         = {0148-7191},
  keyword      = {Internal Combustion Engines,Partially Premixed Combustion,Compression Ignition},
  language     = {eng},
  publisher    = {Society of Automotive Engineers},
  title        = {Partially Premixed Combustion at High Load using Gasoline and Ethanol, a Comparison with Diesel},
  url          = {http://dx.doi.org/10.4271/2009-01-0944},
  volume       = {2009-01-0944},
  year         = {2009},
}