JOURNAL OF THE MARINE ENGINEERING SOCIETY IN JAPAN
Online ISSN : 1884-4758
Print ISSN : 0388-3051
ISSN-L : 0388-3051
“New Generation of Medium-Speed Engines”
Robert Herrmann
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1995 Volume 30 Issue 12 Pages 877-883

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Abstract

In the middle of the 80's, when the fuel cost was reaching very high values, all means to reduce the specific fuel consumption were looked for. Therefore, S.E.M.T. Pielstick launched the long stroke PC20 and PC40 in-line engines series running at lower speeds and increased peak combustion pressures.
To-day the fuel cost has dropped to quite lower values and, to fit to the market demand, following engine features are getting to relatively increased importance:
- Low specific cost (or Price/kW) .
- High reliability and low maintenance costs.
- Reduced nitrogen oxides emissions.
Therefore, S.E.M.T. Pielstick decided to develop a new generation of PC2 and PC4 engines, the <<B>>-types, which main features are:
* Stroke increase within limits to allow to keep the same engine bulk of V-type engines, to minimize the cost increase and to uprate the power at unchanged running speed.
* Peak combustion pressure increase, to keep the fuel consumption at satisfactory levels, making use of the reinforced components developed for the PC20 and PC40 engines.

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