Wärtsilä Vaasa

Wärtsilä is the second largest diesel engine company in the world. Wärtsilä released the Vasa engine series in 1977 and remained in production until 2010. These popular medium speed diesels were produced in Vasa, Finland; hence their name, Vasa. The series comprises three models, the Vasa 22, 32, and 46, with the number denoting the bore size of the engine. Vasa 32 engines are the most popular of the series and can still be found throughout the marine and power generation industries.

Wärtsilä discontinued production of the series in 2010 to make way for new technology. The Vasa series acted as a precursor to the newer 32 D & E series and RTFLEX engines, which are more efficient and have a higher power output.

Wärtsilä produced the engine with versatility in mind. They were designed for both shipboard and power plant applications. The engine could be ordered with a 220, 320, and 460 mm bore in both V and inline configurations. The inline style was available with up to 9 cylinders and V could support up to 18. The most popular was the inline 320 mm bore. Due to the popularity of the VASA32LN engine it was redesigned with a longer stroke to increase horsepower and now for sale as the 32 D and E series.

Vasa engines are turbocharged, non-reversible, and utilize a direct fuel injection system. They were designed to continuously run on HFO (heavy fuel oil), provided that the fuel is pre-heated and at the correct viscosity at the time of injection.

This is the power rating table generated for the Vasa 32LN engine. Engine power ratings are determined by how the engine is being used. The Vasa engines offer 375 kW/cyl and 410 kW/cyl. As the number of cylinders are increased the power is increased. This also applies with the size of the bore, the 220 mm bore engine will provide less hp and kw than that of the 320 mm bore. In short, the size of the engine needed depends on the application it is being used for.

Vasa engines utilize a circulating oil system for lubrication, complete with a main, pre-lubricating pump, and an oil cooler. Smaller Vasa engines use gear type pumps for lubrication where the larger engines use wheel type pumps.

Air is utilized to start the engines. Each cylinder head is equipped with a start air valve that delivers high-pressure air to the cylinder upon startup. This provides the engine the initial rotation force needed to achieve combustion.

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