Marine Diesel Engine Passes Acceptance Test

New Wärtsilä X35 low-speed engine successfully passes factory acceptance test

The Wärtsilä X35 is a completely new Wärtsilä engine that, together with the Wärtsilä X40, will cover the small-bore end of the market. The engines will be used for smaller bulk carriers, product tankers and container feeder vessels. It is a segment where Wärtsilä has not been present for a number of years.

This new electronically controlled low speed engine, the Wärtsilä X35, has successfully passed its Factory Acceptance Tests (FAT). The tests of the two engines took place at both the 3.MAJ Engines & Cranes company facilities in Croatia, and the Yuchai Marine Power Co., Ltd. (YCMP) factory in China. The FAT procedures were attended by representatives from the Classification Society, the shipyard, and the owner of the vessels into which the engines will be installed.

The 6-cylinder Wärtsilä X35 has undergone a series of tests as part of a comprehensive testing and validation programme. The engine performance of the first two engines fully met all expectations and predictions. All the measured results were in keeping with the calculated values, and well within accepted limits. The measured parameters included stresses, strains, temperatures and vibrations in the engine structure, running gears and combustion chamber components, together with pressures and temperatures in the engine processes, as well as fuel consumption, exhaust gas emissions and smoke. The tests furthermore confirmed the predicted brake specific fuel consumption (BSFC) of 176g/kWh, within the usual 5 per cent margin under IMO Tier II conditions.