Mexican Media Brands
VW Doubles Up on SCR
If one SCR system is good, two are. . .
.jpg;width=70;height=70;mode=crop)
Share
(Images: Volkswagen)
Although you might think that after the exceedingly expensive diesel contretemps Volkswagen would be done with compression-ignition engines, that’s not at all the case, at least in Europe. But this time they’re really going after the nitrogen oxides in the exhaust gas: They are fitting the 2.0 TDI Evo engine that is currently used in the Euro Passat and which will be used in the next-gen Golf with two selective catalytic reduction (SCR) systems.
There is one SCR catalyst that is located between the turbocharger, diesel oxidation catalytic converter and connector to the silencer pipe. Then there is a second, located in the underbody of the system.
This allows two doses of AdBlue, the fluid that is injected into the exhaust gas ahead of an SCR catalytic converter to address the nitrogen oxides that are produced by combustion. The fluid is evaporated and becomes ammonia (NH3), which, on the inside of the converter, reacts with the coating and transforms the nitrogen oxides into water and plain, old nitrogen.
In the new setup, they get two cracks at this.
According to Volkswagen, the dual system reduces NOx levels by about 80 percent compared to the previous generation of SCR exhaust gas treatment systems.
RELATED CONTENT
-
Robotic Exoskeleton Amplifies Human Strength
The Sarcos Guardian XO Max full-body, all-electric exoskeleton features strength amplification of up to 20 to 1, making 200 pounds—the suit’s upper limit—feel like 10 pounds for the user.
-
Increasing Use of Structural Adhesives in Automotive
Can you glue a car together? Frank Billotto of DuPont Transportation & Industrial discusses the major role structural adhesives can play in vehicle assembly.
-
Choosing the Right Fasteners for Automotive
PennEngineering makes hundreds of different fasteners for the automotive industry with standard and custom products as well as automated assembly solutions. Discover how they’re used and how to select the right one. (Sponsored Content)
