This problem sound familiar? It involves a common parts manufacturer outside of the Hyundai and Kia organizations: BoschGlobal.
. They touted this as a way to remove nitrogen oxides emissions from their diesel engines without using a Diesel Exhaust Fluid system that injects a reductant fluid, usually urea-based, into a catalyst to convert NOx into diatomic nitrogen , and water. All ICE produce NOx, it's just that diesels have a particularly harder time with it due to the higher combustion chamber pressure and temperatures these engines need to operate at to create combustion.
The appeal of the"lean NOx trap" was that Volkswagen claimed that it could clean up diesel NOx emissions by just using catalytic converters and not require the use of the bulky and pricier DEF injection system, such as. Unfortunately, the reality was that VW's system wasn't reducing emissions at all, but it made it seem like it was using coding in the engine control unit to determine when a diesel-equipped VW was being emissions tested.
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