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A Turbocharged Dual-Fuel HCCI Engine

Olsson, Jan-Ola LU ; Tunestål, Per LU ; Haraldsson, Göran LU and Johansson, Bengt LU (2001) International Spring Fuels and Lubricants Meeting and Exhibition In SAE Special Publications 2001(1627).
Abstract
A 6-cylinder truck engine is modified for turbocharged dual-fuel Homogeneous Charge Compression Ignition (HCCI) engine operation. Two different fuels, ethanol and n-heptane, are used to control the ignition timing. The objective of this study is to demonstrate high load operation of a full-size HCCI engine and to discuss some of the typical constraints associated with HCCI operation. This study proves the possibility to achieve high loads, up to 16 bar Brake Mean Effective Pressure (BMEP), and ultra-low NOdx emissions, using turbo charging and dual fuel. Although the system shows great potential, it is obvious that the lack of inlet air pre heating is a drawback at low loads, where combustion efficiency suffers. At high loads, the low... (More)
A 6-cylinder truck engine is modified for turbocharged dual-fuel Homogeneous Charge Compression Ignition (HCCI) engine operation. Two different fuels, ethanol and n-heptane, are used to control the ignition timing. The objective of this study is to demonstrate high load operation of a full-size HCCI engine and to discuss some of the typical constraints associated with HCCI operation. This study proves the possibility to achieve high loads, up to 16 bar Brake Mean Effective Pressure (BMEP), and ultra-low NOdx emissions, using turbo charging and dual fuel. Although the system shows great potential, it is obvious that the lack of inlet air pre heating is a drawback at low loads, where combustion efficiency suffers. At high loads, the low exhaust temperature provides little energy for turbocharging, thus causing pump losses higher than for a comparable diesel engine. Design of turbocharger therefore, is a key issue in order to achieve high loads in combination with high efficiency. In spite of these limitations, brake thermal efficiencies and power rating close to those of the original diesel engine are achieved with significant reduction in NOdx emissions. The maximum efficiency is 41.2%, which is slightly lower than for the original diesel engine. (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
HCCI, High Load Operation, Engine, Turbocharged
in
SAE Special Publications
volume
2001
issue
1627
pages
13 pages
publisher
Society of Automotive Engineers
conference name
International Spring Fuels and Lubricants Meeting and Exhibition
ISSN
0099-5908
DOI
10.4271/2001-01-1896
language
English
LU publication?
yes
id
ec686f42-4a15-40b8-9682-0709019f36ae (old id 538233)
date added to LUP
2007-09-24 13:57:15
date last changed
2018-01-05 10:13:52
@inproceedings{ec686f42-4a15-40b8-9682-0709019f36ae,
  abstract     = {A 6-cylinder truck engine is modified for turbocharged dual-fuel Homogeneous Charge Compression Ignition (HCCI) engine operation. Two different fuels, ethanol and n-heptane, are used to control the ignition timing. The objective of this study is to demonstrate high load operation of a full-size HCCI engine and to discuss some of the typical constraints associated with HCCI operation. This study proves the possibility to achieve high loads, up to 16 bar Brake Mean Effective Pressure (BMEP), and ultra-low NOdx emissions, using turbo charging and dual fuel. Although the system shows great potential, it is obvious that the lack of inlet air pre heating is a drawback at low loads, where combustion efficiency suffers. At high loads, the low exhaust temperature provides little energy for turbocharging, thus causing pump losses higher than for a comparable diesel engine. Design of turbocharger therefore, is a key issue in order to achieve high loads in combination with high efficiency. In spite of these limitations, brake thermal efficiencies and power rating close to those of the original diesel engine are achieved with significant reduction in NOdx emissions. The maximum efficiency is 41.2%, which is slightly lower than for the original diesel engine.},
  author       = {Olsson, Jan-Ola and Tunestål, Per and Haraldsson, Göran and Johansson, Bengt},
  booktitle    = {SAE Special Publications},
  issn         = {0099-5908},
  keyword      = {HCCI,High Load Operation,Engine,Turbocharged},
  language     = {eng},
  month        = {05},
  number       = {1627},
  pages        = {13},
  publisher    = {Society of Automotive Engineers},
  title        = {A Turbocharged Dual-Fuel HCCI Engine},
  url          = {http://dx.doi.org/10.4271/2001-01-1896},
  volume       = {2001},
  year         = {2001},
}