Biglorryblog learns through my excellent daily news alert from Commercial Carrier Journal/e-trucker Cummins will not be using selective catalytic reduction in its ‘heavy-duty’ truck diesel engines to meet the forthcoming Environmental Protection Agency’s exhaust emission 2010 standards---although its medium-duty (smaller displacement) engines will have SCR exhaust aftertreatment, not least as they already use it over here.
According to the CCJ/e-trucker news report: “The decision to meet 2010 standards without SCR in heavy-duty engines stands in contrast with announcements from Detroit Diesel and Volvo/Mack that their 2010 truck engine solutions will employ SCR technology in order to bring NOx levels within EPA’s mandated maximum levels.”
It seems that Cummins’ heavy-duty engines will instead meet EPA 2010 through a combination of the XPI high-pressure common rail (HPCR) fuel system technology it has jointly developed with Scania (and which is being used by the Swedish truck maker on its latest 13-litre Euro-5 EGR engine---see previous blogs), plus improved cooled exhaust gas recirculation, advanced electronic controls, variable geometry turbochargers and the Cummins diesel particulate filter. Indeed, the Cummins Particulate Filter, designed and built by Cummins Emission Solutions and introduced in 2007, will be the only aftertreatment required for the 2010 solution.
Meanwhile, CCJ reports the company as saying that all its 2010 diesels will “…share a common architecture that includes the XPI HPCR.” But more interestingly Cummins also says its 2010 US truck engines will include 11.9-litre and 16-litre diesel engines to complement its 15-litre Signature/ISX product range. But what's all this about an 11.9 and 16-litre engine?…that’s certainly news to BLB!
Leave a comment