New heavy-duty engine platform from Cummins

Cummins G Series to set new global benchmark for heavy-duty engines in on- and off-highway applications

CUMMINS Inc. have announced the introduction of a new global heavy-duty engine platform to complement their existing global product offering. The G-Series platform is an in-line six-cylinder engine and will be available in 10.5- and 11.8-litre displacements to meet a broad variety of on- and off-highway global market requirements and emissions standards, with initial engines designed to run on diesel fuel.

‘The G-Series global design approach is a vivid demonstration of how Cummins is transforming from a multinational to a truly global company,’ said Steve Chapman, Cummins vice-president and group vice-president – China and Russia. ‘This engine platform has been designed for diverse and global markets by utilizing the expertise and local knowledge of our engineers from around the world.’

With a common, compact installation envelope, the G Series minimizes engineering requirements for vehicle and equipment manufacturers. A key design focus for the G Series has been to achieve significant weight savings in order to increase the power-to-weight ratio. Through this approach, the G Series achieves a low engine weight of just 862kg while retaining all the structural strength and durability expected of a Cummins heavy-duty engine.

The G Series incorporates the Cummins Xtra-High Pressure Injection (XPI) fuel system, derived from the larger and more powerful X Series engine. With multiple injection events driven by high-precision electronic controls, the XPI fuel system contributes to a peak torque of 2,305 Nm, together with a torque rise as high as 60%, allowing the G Series to deliver exceptionally fast response to increasing load factors from low engine rev/min.

The G Series offers fuel efficiency through parasitic reducing technology without variable-flow pumps. A single cam in head (SCIH) design with roller valve train and high-efficiency intake ports continues the design theme of minimum complexity and maximum efficiency. The resulting low-weight design allows more payload to be delivered while requiring less energy to manufacture than competitive designs.

For on-highway markets, the G Series heavy-duty engine platform will be introduced as the Cummins ISG11 and Cummins ISG12, offering a power range from 290hp to 512hp (216–382kW) in a compact and lightweight package. Engines will be available to meet global variations in emissions requirements. At launch in 2014, engines will meet Euro III, Euro IV and China NS4 emissions requirements. Engines for Euro V, Euro VI and US Environmental Protection Agency (EPA) are also in development.

One engine from the new G-Series platform was initially unveiled at bauma 2013 under the name QSM12, and will now be renamed QSG12 as part of this family of engines. The QSG12 (pictured) is purpose-designed to meet US EPA Tier 4 Final and EU Stage IV emissions regulations with a more compact envelope and a more than 30% higher power-to-weight ratio than the class average for engines with a similar power range.

High-efficiency air handling and advanced combustion allow the QSG12 to achieve near-zero emissions without the need for a cooled exhaust gas recirculation (EGR) system. With ratings covering 335hp to 512hp (250–382kW), the QSG12 offers an effective power solution for a wide variety of applications, including wheel loaders, excavators, screens and crushers.

The new G Series will initially be manufactured at the Beijing Foton Cummins Engine Co., serving customers on a global basis, with production scheduled to start during the first half of 2014.