on 2040-cars

Auto blog

VW Jetta TDI dyno shows HP loss trying to recreate cheat mode

Volkswagen is working on a fix for diesel-engined vehicles that are out of compliance with emissions regulations in the US and other countries. We're told that engineers will be presenting a solution internally sometime this month, but that doesn't mean we'll actually see it in the wild this month. One big question we have about the coming fix is, will it affect the car's performance? That question relates to another we have about the engine as it is: How much performance would the 2.0-liter diesel lose right now if it were turned down to pass US emissions? The Fast Lane Car tried to sketch some answers by going to a shop in Denver, Colorado to run a 2011 Jetta TDI with a six-speed DSG transmission on an all-wheel-drive dyno. The thinking was that if you ran all four wheels the car would think it was on the road, whereas if you ran only two the car might think it's being tested. We'll get straight to the numbers: the stock sedan is quoted at 140 horsepower and 236 pound-feet of torque. When run with all four wheels turning it produced an uncorrected 114 hp and 214 lb-ft at the wheels. When run with just two wheels in motion the Jetta got 113 hp and 188 lb-ft at the wheels. Reading the graph, we're told that power differences between the two runs were as much as 15 hp and 32 lb-ft. You'll need to take some salt with these numbers, though, because the dyno and test protocol in the video are nothing like those used by the EPA. The shop attempts to trick the Jetta into 'emissions testing mode' by using the front wheels only for the two-wheel-drive run, but we have a feeling the software code at issue is far more sophisticated than that, since the ICCT, UVA, the EPA, and CARB investigated the situation for more than a year and couldn't figure out. Also, the technician adjusts for being a mile above sea level with a correction factor of 1.2 applied to horsepower and torque, which inflates the disparity in the final power differences over the two runs. Go to YouTube and read the lengthy comments on the video left by Andrew Price for a more thorough dissection of what could explain TFL's disparities. You can watch the video above, and feel free to try and dissect the results yourselves in the comments below. Related Video:

Recharge Wrap-up: Volkswagen adopts CCS Combo plug, Tesla adds Trip Energy Prediction

Volkswagen plans to use CCS Combo plugs as standard for all future plug-in vehicles. The CCS fast-charging allows cars to charge to 80-percent capacity in as little as 15 minutes for cars like the Cross Coupe GTE. This could be a boon to prospective customers, as studies have found plug-in hybrid drivers plug in more frequently than originally expected. Plug-in drivers seem to want to perform as much driving as possible using electricity alone, and VW's plan to adopt the CCS Combo plug could help drivers achieve that. Read more at Green Car Reports. Tesla's 6.1 Firmware update for the Model S includes a Trip Energy Prediction feature. The new feature takes into account things like elevation, speed and predicted driving behavior to estimate the amount of energy used and how much range will be left in the battery after a route is programmed into the navigation system. It can let the driver know if a round trip can be made, and if the driver will need to charge before heading out. The feature updates itself in realtime throughout the drive as well, responding to how much energy is actually being used. Read a rundown of Trip Energy Prediction at Teslarati. The dates for National Drive Electric Week have been set for Saturday, September 12 through Sunday, September 20, 2015. The grassroots celebration of EVs is organized by Plug In America, The Electric Auto Association and the Sierra Club. "We're revved up for National Drive Electric Week 2015, which will offer the public, the media, and policymakers a great opportunity to come check out many of the 20-plus plug-in vehicles on the market," says Sierra Club EV Initiative Director Gina Coplon-Newfield. Last year, more than 90,000 people participated in 152 cities worldwide. Read more in the press release below. National Drive Electric Week 2015-DATES ARE SET SAN FRANCISCO, Calif., Jan., 20, 2015-Dates have been set for the fifth annual National Drive Electric Week: Sat., Sept. 12 through Sun., Sept. 20, 2015. Events will encompass two weekends to give planners maximum flexibility and consumers plenty of opportunity to attend. "This promises to be an exciting year for plug-in vehicles," said Tom Saxton, Plug In America's chief science officer. "The BMW i3 will be on the road for the first full year, we expect deliveries of the Tesla Model X, an updated Chevy Volt, and greater overall sales growth than we saw last year.

2015 Volkswagen Golf SportWagen First Drive [w/video]

Volkswagen currently offers five Golf models in the US, and in just a few weeks it will add the 2015 SportWagen to the lineup. The previous version sold as the Jetta SportWagen, although it was technically a Golf. For the new model, VW product planners decided to align all the hatchbacks under the same name. The SportWagen employs the same engines as the Golf, but significantly stretches its new MQB architecture. The result is greater practicality in the form of cargo room. With the seats up the SportWagen holds 30.4 cubic feet, almost 8 more than the Golf. The gap widens to nearly 14 cu ft with the seats folded; a max capacity of 66.5 cu ft puts the SportWagen into compact crossover territory. That added functionality leads VW to think it can sway buyers shopping the likes of the Honda CR-V and Toyota RAV4. And with the high-mpg diesel variant – 31 mpg city, up to 43 highway – VW hopes to lure those considering fuel-sipping MPVs like the Toyota Prius V and Ford C-MAX. What separates this Golf from those other two segments is the driving prowess we've come to expect from Wolfsburg's best-selling nameplate. While the silhouette is similar to the outgoing Jetta wagon, designers honed the character lines to give the Golf SportWagen a more modern, angular aesthetic. The LED headlights look sharp, the hood now scoops down at a steeper angle into the front fenders, and the general proportions – in line with other Golf models – have changed. The new SportWagen is lower, longer, and wider and than the Jetta SportWagen it replaces. Specifically, it is 1.1 inches longer, 0.7 inches wider, and despite being about an inch lower, actually boasts more headroom. Inside, things look pretty familiar to the current Golf family. There are small, premium touches such as a sporty, flat-ish-bottom wheel, piano-black trim, and an optional one-touch panoramic sunroof that makes the cabin a bright, airy, and pleasant place to be. Otherwise, it's your standard Golf fare, but with a whole lot more room out back. The same two engines that power the standard Golf – the 1.8-liter turbocharged inline-four TSI, and 2.0-liter turbocharged TDI diesel – are also found under the hood of the SportWagen. Gasoline-powered models come with a five-speed manual or a traditional six-speed auto, while the TDI gets six-speed transmissions across the board – either as a row-your-own manual, or a dual-clutch DSG auto with steering wheel-mounted paddles.