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DAF XF NOX SENSOR EURO 6 AFTER CAT 2139930

Part No. 2139930

DAF XF NOX SENSOR EURO 6 AFTER CAT

LENGTH: MM

OEM Reference Number

DAF – 2139930   DAF – 1862931   DAF – 1953530   DAF – 1928760  CONTINENTAL – 5WK96752  CUMMINS – 4326476  CUMMINS – 4326868  –  2872779  –  2897311

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The term DAF 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 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 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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