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Improving Efficiency, Extending the Maximum Load Limit and Characterizing the Control-related Problems Associated with Higher Loads in a 6-Cylinder Heavy-duty Natural gas Engine

Kaiadi, Mehrzad LU ; Tunestål, Per LU and Johansson, Bengt LU (2010) Fall Technical Conference of the ASME Internal Combustion Engine Division, 2010 In Proceedings of the ASME 2010 Internal Combustion Engine Division Fall Technical Conference p.885-892
Abstract
High EGR rates combined with turbocharging has been identified as a promising way to increase the maximum load and efficiency of heavy duty spark ignition Natural Gas engines. With stoichiometric conditions a three way catalyst can be used which means that regulated emissions can be kept at very low levels. Most of the heavy duty NG engines are diesel engines which are converted for SI operation. These engine's components are in common with the diesel-engine which put limits on higher exhaust gas temperature. The engines have lower maximum load level than the corresponding diesel engines. This is mainly due to the lower density of NG, lower compression ratio and limits on knocking and also high exhaust gas temperature. They also have lower... (More)
High EGR rates combined with turbocharging has been identified as a promising way to increase the maximum load and efficiency of heavy duty spark ignition Natural Gas engines. With stoichiometric conditions a three way catalyst can be used which means that regulated emissions can be kept at very low levels. Most of the heavy duty NG engines are diesel engines which are converted for SI operation. These engine's components are in common with the diesel-engine which put limits on higher exhaust gas temperature. The engines have lower maximum load level than the corresponding diesel engines. This is mainly due to the lower density of NG, lower compression ratio and limits on knocking and also high exhaust gas temperature. They also have lower efficiency due to mainly the lower compression ratio and the throttling losses. However performing some modifications on the engines such as redesigning the engine's piston in a way to achieve higher compression ratio and more turbulence, modifying EGR system and optimizing the turbocharging system will result in improving the overall efficiency and the maximum load limit of the engine. This paper presents the detailed information about the engine modifications which result in improving the overall efficiency and extending the maximum load of the engine. Control-related problems associated with the higher loads are also identified and appropriate solutions are suggested. (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 Engine, Efficiency, Load Limit, Control
in
Proceedings of the ASME 2010 Internal Combustion Engine Division Fall Technical Conference
pages
8 pages
publisher
American Society Of Mechanical Engineers (ASME)
conference name
Fall Technical Conference of the ASME Internal Combustion Engine Division, 2010
external identifiers
  • WOS:000290505600084
  • Scopus:80054782771
ISBN
978-0-7918-4944-6
DOI
10.1115/ICEF2010-35012
language
English
LU publication?
yes
id
2974cae4-c54c-40f8-a01e-e16d1abcb56c (old id 1984612)
date added to LUP
2011-07-08 16:18:16
date last changed
2016-10-13 04:37:39
@misc{2974cae4-c54c-40f8-a01e-e16d1abcb56c,
  abstract     = {High EGR rates combined with turbocharging has been identified as a promising way to increase the maximum load and efficiency of heavy duty spark ignition Natural Gas engines. With stoichiometric conditions a three way catalyst can be used which means that regulated emissions can be kept at very low levels. Most of the heavy duty NG engines are diesel engines which are converted for SI operation. These engine's components are in common with the diesel-engine which put limits on higher exhaust gas temperature. The engines have lower maximum load level than the corresponding diesel engines. This is mainly due to the lower density of NG, lower compression ratio and limits on knocking and also high exhaust gas temperature. They also have lower efficiency due to mainly the lower compression ratio and the throttling losses. However performing some modifications on the engines such as redesigning the engine's piston in a way to achieve higher compression ratio and more turbulence, modifying EGR system and optimizing the turbocharging system will result in improving the overall efficiency and the maximum load limit of the engine. This paper presents the detailed information about the engine modifications which result in improving the overall efficiency and extending the maximum load of the engine. Control-related problems associated with the higher loads are also identified and appropriate solutions are suggested.},
  author       = {Kaiadi, Mehrzad and Tunestål, Per and Johansson, Bengt},
  isbn         = {978-0-7918-4944-6},
  keyword      = {Internal Combustion Engine,Efficiency,Load Limit,Control},
  language     = {eng},
  pages        = {885--892},
  publisher    = {ARRAY(0xaa5f578)},
  series       = {Proceedings of the ASME 2010 Internal Combustion Engine Division Fall Technical Conference},
  title        = {Improving Efficiency, Extending the Maximum Load Limit and Characterizing the Control-related Problems Associated with Higher Loads in a 6-Cylinder Heavy-duty Natural gas Engine},
  url          = {http://dx.doi.org/10.1115/ICEF2010-35012},
  year         = {2010},
}