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Cummins starts field testing heavy truck engine in Australia


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Prime Mover / May 18, 2015

Field testing of Cummins’ new 11.8-liter Euro-5 global heavy truck engine, the ISG12, has begun in Australia.

Produced by Beijing Foton-Cummins Engine Company in China, the ISG12 is being tested in Australia with peak outputs of 500hp and 1700lb/ft of torque. Four of the 12-litre engines will eventually be running with fleets in various truck manufacturers’ chassis.

Release of the ISG12 in Australia and New Zealand is likely in late 2016 - following field test and pre-production validation.

The ISG reportedly achieves an engine weight of 860kg in a compact package, and uses selective catalytic reduction (SCR) technology to dose AdBlue/DEF (Diesel Exhaust Fluid) into the exhaust stream.

The ISG12 also incorporates Cummins’ XPI (Xtra-High Pressure Injection) common-rail fuel system, derived from the 15-litre ISXe5. With multiple injection events driven by Cummins electronic controls, the XPI fuel system contributes to the peak torque of 1700 lb/ft and torque rise as high as 60 per cent.

Generating injection pressures in excess of 30,000 psi, XPI also reportedly improves combustion and fuel economy while helping lower noise.

Note: The Foton-Cummins produced 10.5 and 11.8 ISG engines are decontented and simplified versions of the 11.9-liter ISX12. Both engines are loosely based on the 13-liter ISZ “Dakota” engine platform developed in the late 1990s. The 13-liter ISZ was intended to fill the gap between the 10.8-liter ISM and the 15-liter ISX. The ISZ was originally offered exclusively to Navistar in early 2001 for the first two years. Navistar declined, and instead entered into long-term engine supply agreement discussions with Volvo. By the end of 2001, no agreement had been reached between the two companies and the talks ended. The ISZ finally came to rest in China at Dongfeng-Cummins Engine Company.



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