Volkswagen’s rigging of emissions tests for diesel cars comes after nearly 20 years of the technology being incentivized in Europe in the knowledge that its adoption would reduce global warming emissions but lead to thousands of extra deaths from increased levels of toxic gases. The European commission was lobbied strongly by big German car makers BMW, Volkswagen and Daimler, to incentivise diesel. A switch to diesel was said by the industry to be a cheap and fast way to reduce the carbon emissions that drive climate change. Read details article
http://www.theguardian.com/environme...alth-pollution
The VW fiasco has proven beyond doubt that oil burners pollutes . The tag line of CleanDiesel cars is now proving to be nothing but a deceitfully programmed Engine management system to fool the testing system. I am surprised why VW management never took corrective steps to curb such practice. I believe this is going to take the wind out of the VW group, as we can now expect multiple class action law suits, market capital loss, loss arising due to remediation action of potentially millions of car, damaged reputation etc.. More over the potentially weakened VW group may now may be a candidate for takeover by rivals like Toyota or others.
Another good article on Volkswagen's appalling clean diesel scandal, explained..
Since 2009, we now know, Volkswagen had been inserting intricate code in its vehicle software that tracked steering and pedal movements. When those movements suggested that the car was being tested for nitrogen-oxide emissions in a lab, the car automatically turned its pollution controls on. The rest of the time, the pollution controls switched off.
Regulators didn't notice this ruse for years. The problem was only uncovered by an independent group, the International Council on Clean Transportation, which wanted to investigate why there was such a discrepancy between laboratory tests and real-road performance for several of VW's diesel cars in Europe. So they worked with researchers at West Virginia University, who stuck a probe up the exhaust pipe of VW's clean diesel cars and drove them from San Diego to Seattle.
What the researchers found was shocking. On the road, VW's Jetta was emitting 15 to 35 times as much nitrogen oxide as the allowable limit. The VW Passat was emitting 5 to 20 times as much. These cars were emitting much more pollution than they had in the labs.
In May 2014, both California's air-pollution regulator and the EPA ordered Volkswagen to investigate and fix the problem, and the company claimed that it had done so. Once again, the cars performed well in testing, but real-world performance still didn't match up. At that point, EPA regulators really started grilling Volkswagen about the discrepancy, even threatening not to approve the company's 2016 line of clean diesel cars. VW finally cracked and admitted the existence of these defeat devices, which had been carefully hidden in the software code. Scandal ensued.
Volkswagen hasn't explained exactly why it cheated, but outside analysts have a good guess. The NOx emission controls likely degraded the cars' performance when they were switched on — the engines ran hotter, wore out more quickly, and got poorer mileage. Some experts have suggested that the emission controls may have affected the cars' torque and acceleration, making them less fun to drive. (Indeed, some individual car owners have been known to disable their cars' emission controls to boost performance, though this is against the law.)
In other words, Volkswagen wasn't able to produce diesel cars that had the ideal mix of performance, fuel economy, and low pollution. (Or, at least, they couldn't do this profitably.) So they "solved" this trade-off by sacrificing cleanliness and loosening the pollution controls. And they accomplished this via software designed to deceive regulators. This was wildly illegal, and they got caught.
Read full article on
http://www.vox.com/2015/9/21/9365667...passenger-cars