VW and CAE

In case you’re wondering what Volkswagen has come up with to address the emissions issues with its 1.6-liter EA 189 diesel engines, at least for non-U.S. markets (this has been presented to the German Federal Motor Transport Authority, which has ratified the approach), here is the physical part of the fix: That’s a “flow straightener” or “flow transformer.” It is positioned directly in front of the air mass sensor.

In case you’re wondering what Volkswagen has come up with to address the emissions issues with its 1.6-liter EA 189 diesel engines, at least for non-U.S. markets (this has been presented to the German Federal Motor Transport Authority, which has ratified the approach), here is the physical part of the fix:

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That’s a “flow straightener” or “flow transformer.”

It is positioned directly in front of the air mass sensor. The mesh of the device reduces the swirled air flow in front of the sensor so that the sensor can make more accurate readings for purposes of optimizing the combustion process.

What you can’t see is a software update to supplement the performance of the system.

For the 2.0-liter engines that are on the dirty side, there is a software update.

It’s worth noting that computer-aided engineering (CAE) tools (presumably like computational fluid dynamics software) have been called out by Volkswagen as being instrumental in this quickly (comparatively speaking) countermeasure.

As the company states in a release about the fix:

“Thanks to advances in engine development and improved simulation of currents inside complex air intake systems, in combination with software optimization geared towards this, it has been possible to produce a relatively simple and customer-friendly measure.”

Presumably the “customer friendly” part is that the company anticipates that once customers get their dirty diesels (a bit harsh, but realize that VW has been long touting them as “clean diesels”) to the dealers for repairs, the fix for the 1.6-liters will require less than an hour and the update for the 2.0 liters about 30 minutes.