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The Technology and Benefits of Skip-Firing for Large Reciprocating Engines

[+] Author Affiliations
Jacob Klimstra

Wärtsilä Netherland B.V., Zwolle, The Netherlands

Christer Hattar, Ingemar Nylund, Hannu Sillanpää

Wärtsilä Finland Oy, Vaasa, Finland

Paper No. ICES2005-1073, pp. 55-60; 6 pages
  • ASME 2005 Internal Combustion Engine Division Spring Technical Conference
  • ASME 2005 Internal Combustion Engine Division Spring Technical Conference
  • Chicago, Illinois, USA, April 5–7, 2005
  • Conference Sponsors: Internal Combustion Engine Division
  • ISBN: 0-7918-4184-7 | eISBN: 0-7918-3753-X
  • Copyright © 2005 by ASME


Reciprocating engines equipped with electromagnetic gas admission valves per cylinder have the advantages of an excellent response to load steps, opportunities for per-cylinder process optimization and the absence of ignitable mixture in the intake receiver. The absence of a throttle valve reduces the pumping losses and simplifies the control strategy. If such engines have to be operated at loads below 30% of their rated power, the fuel supply to part of the cylinders can be cut off to improve the fuel consumption and decrease the hydrocarbon emissions. In this paper, the benefits of this so-called skipfiring methodology have been predicted and the results could be confirmed with tests on a 5.5 MW four-stroke gas engine.

Copyright © 2005 by ASME



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