New Engine Platform for Cummins

September 16, 2013

Cummins has announced a new global heavy-duty engine platform, the G Series, an in-line six cylinder engine that will be available in 10.5- and 11.8-liter displacements to meet on-highway and off-highway global market requirements and emissions standards.

The initial engines are designed to run on diesel.

"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 VP and Group VP-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."

The G Series minimizes engineering requirements for vehicle and equipment manufacturers with a common, compact installation envelope. A key design focus for the G Series has been to achieve significant weight savings in order to increase the power-to-weight ratio, Cummins says. A sculptured block retains high rigidity while removing unnecessary mass. The use of composite material for the oil pan and valve cover provides further weight savings. With this approach, the G Series achieves a low engine weight of 1,900 pounds.

The G Series incorporates Cummins Xtra-High Pressure Injection (XPI) fuel system, derived from the larger X Series engine. With multiple injection events driven by Cummins electronic controls, the XPI fuel system contributes to a peak torque for the G Series of 1,700 lb.-ft., together with a torque rise as high as 60 percent.

For on-highway markets, the G Series Heavy-Duty engine platform will be introduced as the Cummins ISG11 and Cummins ISG12. These engines offer a power range from 290 horsepower to 512 horsepower 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 U.S. Environmental Protection Agency (EPA) are also in development.

One engine from the new G Series platform was initially unveiled at Bauma in April 2013 under the name QSM12, but will now be renamed QSG12 as part of this family of engines. The QSG12 is purpose-designed to meet U.S. EPA Tier 4 Final and European Union (EU) Stage IV emissions regulations. High-efficiency air handling and advanced combustion enable the QSG12 to achieve near-zero emissions without the need for a cooled EGR system, according to the company. Ratings range from 335 horsepower to 512 horsepower, aimed at a wide variety of applications, including tractors, combines, wheel loaders, excavators, cranes and material handling, road building equipment, compressors, and screening and crushing machines.

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