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DAF CF XF NOX SENSOR AFTER CAT – 2011648

Part No. 2011648

DAF CF XF NOX SENSOR AFTER CAT

LENGTH: 833MM

OEM Reference Number

DAF – 2011648   DAF – 1793378   DAF – 1836059   DAF – 1744683   CONTINENTAL – 5WK96626C  CONTINENTAL – 5WK96619D

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The term DAF CF XF NOX represents several forms of nitrogen oxides such as NO (nitric oxide), NO2 (nitrogen dioxide) and N2O (nitrous oxide, also known as laughing gas). In a gasoline engine, NOX is the most common form of NOX at around 93%, while NO2 is around 5% and the rest is N2O. There are other forms of NOX such as N2O4 (the dimer of NO2), which only exists at lower temperatures, and N2O5, for example. However, owing to much higher combustion temperatures due to high cylinder compression and turbo or supercharging, diesel engines produce much higher engine-out NOX emissions than spark-ignition gasoline engines. The recent availability of Selective catalytic reduction (SCR) allows the properly equipped diesel engine to emit similar values of NOX at the tailpipe compared to a typical gasoline engine with a 3-way catalyst. In addition, the diesel oxidation catalyst significantly increases the fraction of NO2 in “NOX” by oxidizing over 50% of NO using the excess oxygen in the diesel exhaust gases.

The drive to develop a NOX sensor comes from environmental factors. DAF CF XF NOX gases can cause various problems such as smog and acid rain. Many governments around the world have passed laws to limit their emissions (along with other combustion gases such as SOx (oxides of sulfur), CO (carbon monoxide) and CO2 (carbon dioxide) and hydrocarbons). Companies have realized that one way of minimizing DAF CF XF NOX emissions is to first detect them and then employ some sort of feedback loop in the combustion process, minimizing NOX production by, for example, combustion optimization or regeneration of NOX traps.

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