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EPA discovers defeat device in more VW TDI engines

In a sternly worded letter, the United States Environmental Protection Agency has issued a new set of allegations against Volkswagen claiming that so-called emissions defeat software has been found in the company's 3.0-liter TDI V6 diesel engines. This is a completely different engine than the 2.0 TDI that has already been identified as an emissions cheater. In addition to VW, the EPA has included Audi and Porsche in this notification, as the non-compliant engine has been used in vehicles from all three manufacturers from model years 2014 through 2016. The EPA claims that cars equipped with the 3.0 TDI engine know when they are being tested for emissions, and their on-board computers switch into a mode designed to pass the stringent requirements in the United States for diesel exhaust. Vehicles sold in the United States with this engine include the 2014 VW Touareg, 2015 Porsche Cayenne, and 2016 Audi A6, A7, A8L and Q5. The EPA says there are 10,000 vehicles currently on the road with this second defeat device, along with an unknown number of 2016 models either on dealer lots or in the driveways of consumers. According to the EPA, VW's 3.0-liter TDI, like the 2.0 TDI that was found to circumvent US regulations, has code in its computer specifically written to intentionally put the vehicle's engine into a mode that allows it to meet exhaust requirements. When the vehicle is unhooked from testing equipment, it will go back into a mode that emits nine-times higher nitrogen oxide emissions than is allowable under US law. "VW has once again failed its obligation to comply with the law that protects clean air for all Americans," said Cynthia Giles, Assistant Administrator for the Office for EPA's Enforcement and Compliance Assurance. "All companies should be playing by the same rules. EPA, with our state, and federal partners, will continue to investigate these serious matters, to secure the benefits of the Clean Air Act, ensure a level playing field for responsible businesses, and to ensure consumers get the environmental performance they expect." Richard Corey, Executive Officer of the California Air Resources Board, said in a statement, "Today we are requiring VW Group to address these issues. This is a very serious public health matter. ARB and EPA will continue to conduct a rigorous investigation that includes testing more vehicles until all of the facts are out in the open." This story will be updated as new information becomes available.

Is the skill of rev matching being lost to computers?

If the ability to drive a vehicle equipped with a manual gearbox is becoming a lost art, then the skill of being able to match revs on downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. The usefulness of rev matching in street driving is limited most of the time – aside from sounding cool and impressing your friends. But out on a race track or the occasional fast, windy road, its benefits are abundantly clear. While in motion, the engine speed and wheel speed of a vehicle with a manual transmission are kept in sync when the clutch is engaged (i.e. when the clutch pedal is not being pressed down). However, when changing gear, that mechanical link is severed briefly, and the synchronization between the motor and wheels is broken. When upshifting during acceleration, this isn't much of an issue, as there's typically not a huge disparity between engine speed and wheel speed as a car accelerates. Rev-matching downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. But when slowing down and downshifting – as you might do when approaching a corner at a high rate of speed – that gap of time caused by the disengagement of the clutch from the engine causes the revs to drop. Without bringing up the revs somehow to help the engine speed match the wheel speed in the gear you're about to use, you'll typically get a sudden jolt when re-engaging the clutch as physics brings everything back into sync. That jolt can be a big problem when you're moving along swiftly, causing instability or even a loss of traction, particularly in rear-wheel-drive cars. So the point of rev matching is to blip the throttle simultaneously as you downshift gears in order to bring the engine speed to a closer match with the wheel speed before you re-engage the clutch in that lower gear, in turn providing a much smoother downshift. When braking is thrown in, you get heel-toe downshifting, which involves some dexterity to use all three pedals at the same time with just two feet – clutch in, slow the car while revving, clutch out. However, even if you're aware of heel-toe technique and the basic elements of how to perform a rev match, perfecting it to the point of making it useful can be difficult.

$76,400 Porsche S E-Hybrid will debut in Paris

The 2015 Porsche Cayenne S E Hybrid will be an all-new model, one that adds a plug – and the required associated technological bits – to the currently available Cayenne S Hybrid. The most important of those bits is a 10.8-kWh lithium-ion battery, but Porsche's Calvin Kim told AutoblogGreen that the SUV's electric-only range is still pending certification, but Hybrid Cars says that Porsche is estimating it'll be somewhere between 11 and 22 miles, "depending on the style of driving and route topography." Other than the new battery, the electric motor has been upgraded to a 95 horsepower/70 kW unit (up from the 47-hp/34 kW motor in the Cayenne hybrid without a plug). The overall powertrain now puts out a total of 416 hp and can go from 0 to 60 miles per hour in 5.4 seconds. Alongside the electric parts, there's a 3.0-liter supercharged V6 engine and an 8-speed automatic transmission. You can find all of the E-Hybrid's available specs here and stay tuned for more information on the new plug-in SUV when it makes its debut at the Paris Motor Show in early October. The SUV will go on sale in the US on November 1, 2014 with a starting MSRP of $76,400, plus a destination charge of $995. In a new press release (available below), Porsche is also proudly saying, once again, that it will be the world's only automaker offering three plug-in hybrid models, once the Cayenne S E-Hybrid hits the market. The others are the Panamera S E-Hybrid and the 918 Spyder. How long will this reign at the top last? World premiere of the Porsche Cayenne S E-Hybrid in Paris Leading the industry: Porsche offers three plug-in hybrid models Stuttgart/Atlanta. The new Porsche Cayenne S E-Hybrid celebrates its world premiere at the Paris Motor Show. It is the world's first luxury SUV to offer a plug-in hybrid drive, setting new standards in its segment. The Cayenne S E-Hybrid also makes Porsche the leading manufacturer of plug-in hybrid vehicles: Complementing the Panamera S E-Hybrid and the 918 Spyder, Porsche is the only manufacturer worldwide to offer three plug-in hybrids. In addition to the Cayenne S E-Hybrid, Porsche is presenting the other models that comprise the new generation of Cayenne including the Cayenne S, Cayenne Turbo, and Cayenne Diesel. Increased efficiency and performance, even more precise handling, a sharper design and a broadened array of standard equipment are its defining features.