The Wärtsilä 31 is available in 8 to 16 cylinder configurations and has a power output ranging from 4.7 to 9.8 MW, at 720 and 750 rpm. The launch of the Wärtsilä 31 introduces a 4-stroke engine having the best fuel economy of any engine in its class. At the same time, it maintains outstanding performance across the complete operating range. Its modular design enables a significant reduction in maintenance time and costs, thereby improving power availability and reducing the need for spare parts.
Wärtsilä 31 is recognised by Guinness World Records as the world's most efficient 4-stroke diesel engine.
The Wärtsilä 31 retains its high efficiency and environmental values throughout the entire lifecycle of the vessel.
The Wärtsilä 31 is designed to be suitable for a broad range of ship types and applications, both as a main propulsion engine and in diesel electric configurations, or as an auxiliary engine. It can be optimised for running either at constant speed or along a propeller curve. In the Offshore sector, the Wärtsilä 31 is a perfect solution for OSV´s and drilling or semi-submersible vessels, where operational flexibility, high power density, long intervals between overhauls, and high levels of safety are of paramount importance.
A new 158 metre long car and passenger ferry being built for Danish operator Mols-Linien, will be powered by two 8-cylinder Wärtsilä 31 main engines.“The selection of this particular engine was based on the unique efficiency for the required output, and also the favourable maintenance intervals it allows.” Mols-Linien A/S - Technical Director Flemming Kristensen
The fishing vessel will be powered by the Wärtsilä 31 engine and a complete propulsion system from Wärtsilä. “... a new vessel that will represent the future of the fishing fleet. Wärtsilä’s propulsion solution provides the efficiency and environmental sustainability we needed for the ship,” Audhild Hepsø, General Manager, Peter Hepsø Rederi AS.
The vessel will feature the Wärtsilä 31 engine and propulsion machinery. “We wanted to build a new vessel that represents the future. For this reason we have emphasised high efficiency and environmental sustainability, and Wärtsilä was the obvious choice to meet these aims.” Strand Havfiske AS – Managing Director Janne-Grethe Strand Aasnæs.
“We are convinced that Wärtsilä, with its long and good reputation as an engine builder, is able to build a reliable and efficient engine. Another feature in favour of the Wärtsilä 31 was the connection to the CBM (Condition-Based Maintenance) system. It is an advantage to us that Wärtsilä can monitor the engine operation online and, if necessary, provide us with instant advice.” FSUE Atomflot, Head of diesel-electric icebreakers, Alexander Degterev