Posted on 09/25/2015 8:08:56 AM PDT by SeekAndFind
Volkswagen is confronted with a monumental challenge.
The company has admitted that 11 million of its cars used illegal software to cheat emissions standards.
Now, many owners are demanding that the offending cars be fixed.
That's easier said than done, and Volkswagen has already tried — and failed — twice.
Here's the issue, according to the US Environmental Protection Agency: Cars with Volkswagen's 2-liter TDI turbo-diesel four-cylinder engines include software that detects when the car is undergoing emissions testing and turns on a suite of pollution-control systems.
But as soon as the test ends, the controls switch off, leaving the engine free to emit up to 40 times the legal limit of nitrogen oxide, a highly polluting gas. According to the California Air Resources Board, Volkswagen admitted to using a defeat device during a September 3 meeting with the agency and the EPA.
The problem for Volkswagen is that getting the engine's emissions in line with pollution standards probably means sacrificing something else.
"Building an engine involves balancing four factors — performance, emissions, durability, and fuel economy," explained Jake Fisher, Consumer Reports' director of automotive testing.
Right now, VW has sacrificed emissions to create a TDI engine that offers great performance, incredible fuel economy, and solid reliability.
"Whatever the fix is, it will likely sacrifice fuel economy and probably durability as well," Fisher said.
(Excerpt) Read more at businessinsider.com ...
That is correct.
They are primary components of photochemical smog, as well as tending to form nitric and nitrous acids when combined with moisture in the air.
There is a lot of interaction, it is part of a SYSTEM. Do not look at things in isolation. Do not believe there is only ONE centralized solution to a problem.
Most rural Floridians don't have safety sticker inspections to pass! (After FL "bureaucracy run-amok" got it changed).
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