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Maritime Propulsion

March 19, 2024

Accelleron Turbocharger Achieves High Efficiency on New Two-Stroke Engine

Source: Accelleron

Accelleron has been chosen to supply turbochargers for Japanese engine builder Makita’s first small-bore two-stroke marine engine featuring exhaust gas recirculation (EGR). The step follows a successful matching test in which Accelleron’s A255-L turbocharger demonstrated high efficiency, supporting both low NOx emissions and overall fuel consumption on the Makita-built MAN B&W 6G45ME-C9.7-EGRBP engine.

The Makita engine, 6G45ME-C9.7-EGRBP, will be the first of its type worldwide to feature EGR bypass, which allows the engine to match EGR operation to engine load to deliver the required NOx emissions reduction. The EGR bypass relies on good turbocharger efficiency, and the A255-L enabled the engine to reach Tier III NOx emissions limits with a relatively low power demand, contributing to better fuel consumption and therefore lower greenhouse gas emissions.

The first Makita MAN-MITSUI-B&W 6G45ME-C9.7-EGRBP engine with Accelleron’s A255-L turbocharger will be deployed on a 40,000 DWT bulk carrier for Japanese shipyard.

The first A255-L was introduced in 2019 as an extension to the A200-L series, which now has more than 220 units delivered on two-stroke engines. The unit features a turbocharger efficiency of up to 75%.