Scania expands IMO Tier III engine range

8 May 2023

Scania announced it has added seven new IMO Tier III compliant marine engines to its existing portfolio.

The new DI13 units of 257 kW, 280 kW, 284 kW, 331 kW, 368 kW, 405 kW, and 441 kW at the rated speed of 2100 rpm widen the range of Tier III propulsion engines with reduced NOx emissions. The new marine engines—available in the heat exchanger or keel cooling systems—received type approval by the main classification societies and are ready for delivery to customers in 2023, Scania said.

These marine propulsion engines are designed for prolonged operation in different applications, including passenger and road ferries, supply vessels, crew transfer vessels, pilot boats, as well as sea rescue and patrol boats.

The main change in the new engines is the addition of a selective catalytic reduction (SCR) system for NOx control. In addition to the SCR aftertreatment, the Tier III engines seem to have a higher compression ratio compared to the Tier II versions. The new engines continue to use unit injectors.

The Scania SCR system contains an exhaust routing valve that enables to by-pass the SCR system in order to meet the class requirements for marine installations.

Source: Scania