The Wärtsilä 46 Performance upgrade – TPL 73-A4X + short overlap Miller combines the latest turbocharger technology with Miller inlet valve timing to improve turbocharger efficiency, reducing specific fuel oil consumption (SFOC) and therefore emissions and OPEX.
The upgrade involves replacing the performance-related parts of the engine’s TPL 73-A turbocharger and adjusting the inlet valve timing. The camshaft pieces that operate the inlet and exhaust valves are also replaced to allow the engine to take full advantage of the increased charging pressure provided by the upgraded turbocharger.
The upgrade reduces operating costs due to reduced SFOC and by extending the maintenance interval for the turbocharger’s rotating parts from 50,000 to 75,000 (SIKO) running hours and resetting the lifetime of the camshaft. CO2 emissions are also reduced as a result of the lower SFOC, helping ship owners and operators to comply with increasingly strict environmental regulations.
The Wärtsilä 46 Performance upgrade is EIAPP certified.