To meet stricter US and international regulatory emissions, engine manufacturer Cummins has released its proven high-speed QSK60 diesel engine with a newly developed selective catalytic reduction (SCR) aftertreatment system
Cummins unveiled the US EPA Tier 4/IMO Tier III-compliant four-stroke engine with its aftertreatment solution during an online Cummins Marine Virtual Showcase on 14 April. Designed with a modular common rail fuel system, the high-speed V-16-cylinder is turbocharged and after-cooled, with an output range of 1,491 to 2,013 kW at 1,600 to 1,900 rpm in variable speed propulsion applications and 2,000 kW at 1,800 rpm in fixed-speed auxiliary and diesel-electric applications. Fuel consumption in variable speed applications ranges from about 349.4 to 494.8 litres per hour.
During the showcase, Cummins product manager Carlos Ortega said first and foremost, the QSK60 equipped with SCR “would be extremely beneficial in the commercial transport sector among tugboats and inland waterway vessels. Our Tier 4 solution will be able to bring these vessels up to the future of the emissions standards in the US.” He noted the four-stroke engine would be suitable for offshore supply vessels, crew boats and windfarm support vessels where “historically it has proven reliability, availability and durability.”
If used in passenger and ferry applications, for instance, Mr Ortega said, the QSK60 EPA Tier 4/IMO Tier III engine would be suitable for use with “a wide range of transmissions, high-speed propellers, and includes a dedicated feature for optimising the operation when waterjets are used.”
As it is IMO Tier III-compliant, he noted, the engine will allow owners the flexibility to operate their vessels in international waters.
“For a lot of customers in the marine market, uptime is their biggest concern,” said Cummins Marine market segment leader Eddie Brown. “How much they can get done and when they can get it done — makes or breaks their success. We are providing a solution for our high-horsepower marine market that will help customers comply with emissions regulations without increasing their total cost of ownership. Our new QSK60 EPA Tier 4/IMO III solution addresses this need.”
The relatively compact aftertreatment has four exhaust configuration options, allowing naval architects and shipyards design and installation flexibility in a compact engineroom, said Mr Ortega.
At the showcase, Cummins launched the high-speed, inline, four-cylinder B4.5 engine, extending the range of lower horsepower offerings for marine applications and PrevenTech Marine, a remote engine monitoring technology aimed at reducing maintenance and increasing vessel uptime.
Cummins said the QSK60 EPA Tier 4/IMO III product is available for limited production starting in April.
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