Volvo Penta has unveiled a new line of environmentally friendly marine engines, with variants complying with International Maritime Organisation (IMO) standards – from Tier II through to Tier IV.
Available in both a five-litre and eight-litre capacities, known as the D5-series and D8-series, respectively, the engines were developed in co-operation with other divisions within the Volvo Group, particularly Volvo Trucks and Volvo Buses.
Following extensive field tests across a range of different industries, the commercial marine-optimised units are nearing release for market and feature a re-designed platform, with advanced fuel injection and after-treatment systems. According to Volvo Penta, the Tier II and Tier III configured engine units are brand new models to the group's marine division.
"These robust D5 and D8 engines share the same base engine design as their D11, D13 and D16 counterparts, as well as a common electronics platform that allows them to communicate using the same protocol, regardless of emissions level," commented the company.
The engines' inline four- and six-cylinder design features a common design footprint, with components like the turbocharger located in the same place on all models. Displacement in the D5 and D8 is increased compared to previous versions, offering improved engine block stiffness, as well as higher torque at low speed. But despite the larger displacement, fuel consumption is also reduced by up to 2.5 per cent.
Additionally, both the Tier II and Tier III configured engines do not require an incorporated exhaust gas recirculation system, whilst the Tier IV system utilises only selective catalytic reduction for reduced maintenance and upkeep costs, concluded Volvo Penta.