WASHINGTON – The EPA dismissed Navistar’s bold claim that its rivals’ SCR engine systems are routinely ‘tricked’ and circumvent the 2010 emissions regulation, but the agency did propose tougher ...

Looking back on writing about truck technology for many years, there have been just a few standout engine introductions. The introduction of the Cummins Signature 600/ISX, with dual overhead camshafts ...

2010-model diesels are running well and turning in better fuel economy than their EPA-'07-spec predecessors, according to reports we've heard at industry meetings and in conversations with fleet ...

The move from Tier 3 to Tier 4 Final diesel engines above 74 horsepower brought with it a whole grab bag of new components and systems – diesel particulate filters (DPFs), diesel oxidation catalysts ...

PACCAR has patented a method to evaluate Diesel Exhaust Fluid (DEF) quality in emissions aftertreatment systems. By analyzing NOx conversion efficiency in SCR units, the system adjusts DEF dosing to ...

If the vehicle displays an E22 warning, it indicates a DEF dosing malfunction, which, if not addressed, could eventually lead to engine shutdown. This warning may occur due to a low DEF tank or issues ...

Mack Trucks offers a calculator on its website to compare the costs of the latest selective catalytic reduction (SCR) technology. Fill in six pieces of information – diesel price per gallon, DEF price ...

With 15 months of experience since the EPA 2010 emission standard took effect, diesel exhaust fluid supplier Air1 sees the market for its product developing as expected. In the first year after the ...

Single Module aftertreatment system combines the Diesel Oxidation Catalyst (DOC), Diesel Particulate Filter (DPF) and Selective Catalytic Reduction (SCR) systems into a single canister. The Cummins ...