At Bauma, Cummins also unveiled its new QSX11.9 engine for Tier 4 interim/Stage 3b emissions for 2011. The engine is available in ratings from 300 to 500 hp, with peak torque of 1600 lb.ft.
the substrate not including the canning. The canning adds about an inch in diameter and a few inches in length.” Cummins will also offer a combined catalyst-and-muffler unit, “to make installations easier,” said Calas. “Rather than have to mount the Cummins Compact Catalyst and an additional muffler, there can be one assembly step for the OEM.” The Cummins Compact Catalyst will also be used on the Cummins QSB6.7 L engine on ratings below 174 hp. On the other end of the Tier 4 spec- trum, Cummins also presented its new QSX11.9 and QSX15 heavy-duty engines at Bauma. Designed to meet the 2011 Tier 4 interim standards, the QSX15 engine is available in ratings from 400 to 600 hp with a peak torque rating of 2050 lb.ft. The QSX11.9 engine is rated 300 to 500 hp, with peak torque of 1600 lb.ft. The engines share a number of fea- tures, including Cummins XPI Xtra high pressure common rail fuel sys- tem, cooled EGR, variable geometry turbochargers from Cummins Turbo Technologies, a Cummins Direct Flow air cleaner from Cummins Filtration and a Cummins Particulate Filter from Cummins Emission Solutions. “The QSX engines are the culmina- tion of a heavy-duty engine develop- ment program with an investment by Cummins of almost $100 million,” said Hugh Foden, executive director, Cummins Off-Highway Business. “With the on-highway ISX versions of the engine already on the road in North America, this means that the QSX engines will enter the off-high- way market with proven performance. “Equipped with next-generation systems such as XPI fuel injection and VGT turbochargers, the QSX engines are ready to move forward to meet Tier 4 final near-zero emissions in 2014 with minimal change.” dp
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