Cummins Inc received certification from the Environmental Protection Agency (EPA) for its 2010 Heavy-Duty big-bore ISX15 and MidRange ISB6.7, ISC8.3, and ISL9 engines. Certification of these engines means the Cummins engine lineup for on-highway applications meets the near-zero emissions levels required for all engines manufactured in 2010.
The new EPA regulations, which took effect Jan 1, 2010, set nitrogen oxides (NOx) and particulate matter (PM) emissions levels of 0.2 grams and 0.01 grams per brake-horsepower-hour, respectively.
Cummins will utilize Selective Catalytic Reduction (SCR) technology to meet the EPA near-zero emissions standards.
“Our decision to use SCR technology has given us the ability to provide customers with the most fuel efficient engines for on-highway applications. We expect to see at least 5% fuel economy improvement for the ISX15 and up to 3% improvement for the MidRange products,” said Jim Kelly, president of the firm’s Engine Business.
Cummins EPA 2010 engines will include an enhanced cooled EGR system and a single VGT turbocharger. The ISX15, ISL9, and ISC8.3 feature the Cummins XPI fuel system, and the ISB6.7 features an improved High Pressure Common Rail (HPCR) fuel system. The new SCR catalyst is included along with the Cummins particulate filter, first introduced in 2007, in the Cummins aftertreatment system. Incorporating SCR technology will also require the use of Diesel Exhaust Fluid (DEF) at an average rate of 2% of diesel fuel consumption.
To best serve the vocational and less-than-truckload markets, the Cummins ISX11.9 will be introduced later in 2010. The ISX11.9 is on target for limited production in mid-2010 with full production commencing in late summer 2010. Cummins will submit necessary documentation for EPA 2010 certification for the ISX11.9 later this year, prior to introduction to the marketplace.