In an important step for mining engines, 2019 Stage V is the first European emissions step which impacts engines above 560 kW (750 hp). At Bauma, Cummins will debut the QSK60 Stage V engine which is part of its 560-2,611 kW (750-3,500 hp) mining line up. The QSK60 is available from 1,398-2,125 kW (1,875-2,850 hp) for mining excavator and dump truck use with a proven durability of close to 4.2 million litres (1.1 million US gallons to overhaul). Cummins Stage V products come with more power and torque, are less complex and easier to install, and require less servicing.
A redesigned power cylinder, optimised wastegate turbocharging and improved crankcase breather system work to keep particulate matter (PM) below the Stage V levels. Cummins’ modular SCR system is used to reduce NOx to the required level and features an integrated decomposition chamber and Cummins’ airless dosing system designed to last the life of the engine. The use of SCR reduces engine backpressure, for increased fuel economy and optimised temperature management minimises Adblue/DEF consumption.
The two-stage QSK60 engine features a simplified air handling configuration using Cummins turbochargers with intercoolers to achieve an altitude capability of over 3,500 m with easy access to the top end for servicing. The latest NanoNet® filtration technology captures and retains more harmful particles than traditional media, for longer fuel pump and injector life with better reliability. “Cummins Tier 4 Final combustion and emission technology solution for North America has positioned us to meet Stage V with minimal OEM impact. Using proven SCR technology with the renowned reliability and durability of the QSK range means customer can select Cummins with no concerns,” says Alexei Ustinov, Vice President Off-Highway Engine Business at Cummins.