VW US Diesel emissions debacle

[kevm14]

Right. I guess I am just impressed that GM still largely does their own.

[kevm14]

His comment about speedometers being inaccurate is also funny. Plenty of American OEMs ship accurate speedos.

[kevm14]

They detect the driving cycle and switch which emissions model they use in the S/W which ends up under injecting urea, hence increased emissions.

I just got to that part (at the end). Clearly, this was done to game the system.

[kevm14]

What I don't understand is what the advantage is. How does injecting less urea really help VW sell a more appealing product? Does urea injection also reduce fuel economy and power? I didn't think so. But perhaps conversion efficiency requires certain engine parameters (like a catalytic converter in a gas engine requires a stoichiometric AFR). And perhaps those parameters (like in a gas engine) preclude ideal power or fuel efficiency.

What's particularly damning is that in the alternative low urea mode, the emissions reduction efficiency checks are disabled! In other words, emissions system efficiency falls so far that the car should set a check engine light on itself, but it doesn't.

[kevm14]

They had to cut the Q/A???

[Adam]

What I don't understand is what the advantage is. How does injecting less urea really help VW sell a more appealing product? Does urea injection also reduce fuel economy and power? I didn't think so. But perhaps conversion efficiency requires certain engine parameters (like a catalytic converter in a gas engine requires a stoichiometric AFR). And perhaps those parameters (like in a gas engine) preclude ideal power or fuel efficiency.

What's particularly damning is that in the alternative low urea mode, the emissions reduction efficiency checks are disabled! In other words, emissions system efficiency falls so far that the car should set a check engine light on itself, but it doesn't.

Slightly lower operating costs with reduced urea consumption?

[Adam]

They had to cut the Q/A???

The CCC runs a very tight ship (schedule-wise). I will poke around to see if they recorded it an uploaded it separately. Don't hold your breath.

[Adam]

The talk page (with links to stuff, like the slides)

https://events.ccc.de/congress/2015/Fah ... /7331.html

[Adam]

The talk page (with links to stuff, like the slides)

https://events.ccc.de/congress/2015/Fah ... /7331.html

The slides include the speakers' email addresses for Q&A.

[kevm14]

This was predictable from the talk:
http://autoweek.com/article/vw-diesel-s ... dailydrive

Less risk/culture of everyone suing everyone, so no real need for a goodwill package in the EU.

Although the EU industry commissioner claims it's more than that...

"The issue of compensation goes beyond the difference in the legal set-up between the U.S. and the EU and plays a fundamental role in viewing VW as a responsible and trustworthy company," Bienkowska also stated in the letter addressed to Mueller