Cummins QSK95 and Komatsu: the heart of a giant
Cummins compared engines in order to highlight the best solution for mining, and Komatsu as well. QSK 95 shows excellent performances
Komatsu also appreciates the features of the Cummins QSK95, one of the most agile and versatile engines, despite its size. Just consider the 4375 kVa it is capable of delivering in stand-by mode or the 3132 kW and 24136 Nm it can unleash at sea. Finally, the MRS common rail, which provides quick response and load pickup with lower noise and vibration, along with four compact turbochargers, plus the two-stage aftercooling, that enables a compact radiator setup In mining, the Cummins QSK 95 feels right at home.
What QSK95 better fits Komatsu?
Cummins has put a spotlight on the comparative performance differences between products within its engine range, to assess where and when miners might make the jump up in size. To test when a larger engine can create value within mining, Cummins conducted a detailed, controlled simulation study. The analysis compared the Cummins QSK95 with the smaller, 3,500-horsepower QSK78 in both 320-ton and 400-ton trucks across eight real mine haul routes.
Most of the sites simulated were located more than 3,100 meters above sea level and the study was based on single equipment condition. The goal was to evaluate cycle time, fuel efficiency, performance, productivity and total cost of ownership.
Producing up to 4,400-horsepower, the QSK95 is Cummins’ most powerful engine. It is also the most powerful available in the ultra-class haul truck category. Engineered as a clean sheet design with mining requirements in mind, the QSK95 delivers performance, reliability, and durability in ways that directly impacts total cost of ownership and mining productivity.
And the winner is…
The results from the extensive Cummins simulation study showed that a 400-ton haul truck powered by the QSK95 was 11 percent more productive than the same truck with a 3,500-horsepower engine. Compared to a 320-ton truck with a 3,500-horsepower engine, the QSK95-powered 400-ton truck delivered a 24 percent boost in productivity. Compared to a 3,500-horsepower engine, the QSK95 is expected to deliver up to 29 per cent longer life to overhaul.
