Wartsila 50SG is a four-stroke, spark-ignition, lean-burn Otto cycle gas engine with a pre-chamber.
It was designed on the basis of a proven technology, which is applied in a smaller engine – 34SG.
An important feature of the new gas engine in the Wartsila product range is an exceptionally high efficiency of the power plant – over 50% in the combined cycle.
Modern gas engines must run only with a lean mixture to achieve low emissions without the need for additional exhaust emission suppression systems. In case of lean mixture, there is much more air in the cylinder than necessary for the complete combustion of the gas.