Navistar considers new emissions reduction technologies

Christopher Goodfellow - 16 March 2011

Navistar International is looking at some "exciting technologies" to reduce NOx emissions in its heavy-duty diesels, but aftertreatment using Diesel Exhaust Fluid (DEF) is not one of them, according to its Senior Vice President for North American Sales Operations

According to Truckinginfo, Jim Hebe told a press conference at the Work Truck Show in Indianapolis: "We always said we would stay with in-cylinder [NOx reduction] unless we found something better, fortunately, there are some exciting technologies out there that we never had before -- one of them ours."

At the moment Navistar meets EPA 2010 emissions regulations using Exhaust Gas Recirculation (EGR) and emissions credits earned by meeting emissions standards ahead of schedule in earlier-year models. When its emissions credits run out it will have to meet the EPA's 0.2 gram per horsepower-hour NOx rule using technology alone.

In 2009, Navistar acquired a stake in clean tech firm Amminex, which has developed an ammonia storage and delivery system. This system uses cartridges know as AdAmmine to store ammonia, which is then used to breakdown NOx gasses in the exhaust stream as in a similar manner as  conventional SCR. It is possible Hebe is referring to this technology.

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