LOUISVILLE, Ky. - Improved fuel economy, performance and reliability over today's engines were all promised by Cummins when it unveiled its 2010 engine line-up in advance of the Mid-America Trucking S...
LOUISVILLE, Ky. – Improved fuel economy, performance and reliability over today’s engines were all promised by Cummins when it unveiled its 2010 engine line-up in advance of the Mid-America Trucking Show.
The 2010 engines – including a new ISX15 and ISX11.9 – will all use selective catalytic reduction (SCR) in 2010. They’ll also use Cummins XPI fuel system, an enhanced cooled EGR system and a single variable geometry turbocharger, in addition to the SCR system. Cummins will use a copper zeolite material within the SCR catalyst, which it says offers a greater NOx efficiency rate than the more commonly-used iron zeolite alternative.
Cummins officials said the ISX15 will be up to 5% more fuel efficient than today’s engines and up to 9% better than the in-cylinder solution the company was initially pursuing. It reversed paths last August upon discovering that further fuel efficiency gains could be achieved using the recently-discovered copper zeolite, the company explained.
The ISX15 will be available with 400-600 hp and torque output of 1,450-2,050 lb.-ft. When Cummins made the switch to SCR, it scrapped plans to develop a 16-litre ISX because it found it could achieve the same performance with a lower displacement engine, Steve Charlton, vice-president of heavy-duty engineering, explained.
The ISX11.9 will share many common parts with its bigger brother, such as the EGR system, variable geometry turbo and XPI fuel system. Cummins said it’s a lightweight medium-bore engine ideal for vocational trucks, day cabs and emergency vehicles. It will come with 310-425 hp and 1,150-1,650 lb.-ft. of torque.
“Customers can count on our engines to be even better in 2010 in every regard,” vowed Charlton. “Our heavy-duty engines for 2010 have a large ‘sweet spot’ due to the low-temperature NOx conversion capability of the copper zeolite catalyst, which means that these engines are extraordinarily driver-friendly. Fuel economy gains can be realized with even the most inexperienced driver and, at the same time, the engines deliver performance that the driver will love.”
Cummins also unveiled its 2010 mid-range engine line, which doesn’t vary much from current designs except for the addition of the SCR system. Mid-range offerings include: The ISB6.7 with 200-325 hp and 520-750 lb.-ft. of torque; the ISC8.3 with 260-350 hp and 660-1,000 lb.-ft. of torque; and the ISL9 with 345-380 hp and 1,150-1,300 lb.-ft. of torque.
“With the use of SCR, we’re able to tune the combustion recipe in the engine to dramatically reduce diesel particulate filter regeneration,” explained Jim Cramer, 2010 ISB technical program leader. “That means less fuel and greater simplicity in operations for our customers.”
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