US-based marine diesel engine manufacturer Cummins has unveiled two new marine engines, QSK19 and QSK60, which are Tier 3 certified by the US Environmental Protection Agency (EPA).
Compared to Tier 2 standards, a Tier 3 engine will emit 50% less particulate matter and 20% fewer nitrogen oxides by using advanced combustion technology without the need for after-treatment of engine exhaust gas emissions.
Cummins marine sales manager for North America Scott Rath said: "With minimal changes to engine architecture, integrating the Tier 3 products into existing vessel designs is not difficult. Customers will continue to see world-class reliability, durability and performance from the next generation Quantum Series engines."
Both engines feature the same premium base engine hardware and footprint as the existing MCRS product.
The lubrication, cooling, air handling, fuel and exhaust systems are the same design as the current product to ensure there is minimum disruption for series-built vessels or replacement engines.
EPA’s Tier 3 marine emissions regulation came into effect on 1 January 2012 for Cummins engines ranging between 3.5 litres and seven litres per cylinder and will continue through to 2014, Cummins said.
The company said the QSK60 is the only engine in its marine portfolio that required EPA Tier 3 certification in 2012, while the QSK19 will need to meet the new requirements from 1 January 2013.
Cummins’ QSK19 and QSK60 engines, which have Tier 3 ratings from 660 to 750hp and 2000 to 2700hp respectively, are suitable for applications such as offshore support, towing, cargo and passenger transport, as well as ship’s service power and diesel electric applications.
Designed for light load operation, the Cummins Quantum Series MCRS auxiliary engines will also be capable of providing full power to meet the variable power demands of diesel electric applications.