Cummins Launches New QSB Engine at ConExpo

Cummins has launched their next-generation QSB engines which feature enhancements for superior performance, durability and reduced noise. These engines not only meet the Environmental Protection Agency (EPA) Tier 3 emissions requirements, but are fully capable of moving forward to the future Tier 4 requirements.

Cummins QSB engines feature advanced electronics, new sculpted blocks, rear gear trains, and High-Pressure Common-Rail fuel systems. The QSB will be available in both a four- and six-cylinder platform. The engines are rated from 110-275 hp (82-205 kW) and are specifically designed to meet the durability, reliability and power density requirements of premium applications such as excavators, materials handling equipment and cranes where high performance is essential at every site.


"We've enhanced the QSB with some evolutionary durability and reliability updates which move the engines significantly ahead of the competition. Cummins in-cylinder emissions solution has enabled increased performance while meeting regulations without the use of complex turbocharger arrangements or external hardware such as exhaust gas recirculation," said Dave Crompton, Cummins Vice President - MidRange Engine Sales. "These upgrades ensure long-term platform stability for the OEM beyond 2011 with the addition of aftertreatment. Cummins is focused on providing engine platforms, customer support and technology to the construction market that are second to none in the industry every time," he added.

Engine sociability is becoming important not only in North America, but in some areas of the world noise levels are being legislated. To meet these new and impending requirements, Cummins has incorporated many enhancements that significantly reduce the noise level of the engines by as much as 9 dBA. The new QSB utilizes a rear gear train, an enclosed valve tappet cavity, and a sculpted block to reduce the noise level such that the Tier 3 engine is as quiet at full load as its predecessor was without load. This is a benefit not only for meeting global requirements, but also enhances the operator's experience and reduces the potential for fatigue and distraction due to high noise levels.

Cummins stated that the QSB engine is backed by Cummins industry-leading QuickServe Guarantee program. Cummins QuickServe offers factory-certified technicians the most sophisticated diagnostic and repair tools in the industry and the largest international parts and service network of any engine manufacturer.