Volvo Penta chooses SCR for Tier III concept

The company is initially launching its IMO Tier III solution for its 13-litre models. used for a wide variety of marine applications. It will be available for inboard engines and the Volvo Penta Inboard Performance System (IPS) package (with a power output of 294-588kW), auxiliary engines (ranging from 294-441 kW), and gensets (ranging from 300-400 kW).

“We’ve opted for the use of SCR because it keeps the engine working efficiently with optimized fuel consumption and keeps the power up to the right level,” said Thomas Lantz, product planning manager, marine commercial, Volvo Penta.

The solution exceeds stipulated emissions limits, reducing NOx by up to 75%. Exhaust gases are mixed with urea or diesel exhaust fluid (DEF) in the SCR unit. There is a separate urea injector pipe, while two alternative exhaust outlets enable different configurations for ease of installation. The DEF tank is designed to hold enough urea for 3,200 liters of fuel, and there are sensors to check the urea levels and quality. A dosage pump and control unit are also included

Twin six-inch outlets enable flexible and easy installation, and piping has also been increased to six inches. The engine will have the same footprint as current models, and the exhaust aftertreatment system works with both Volvo Penta’s Electronic Vessel Control (EVC) and Marine Commercial Control (MCC) systems.

The concept will have undergone 20,000 hours of field-testing when it is launched in 2018, Volvo Penta said.