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VW decides against active-cooling system for e-Golf lithium battery

When the 2015 VW e-Golf was introduced at the LA Auto Show last year, VW said it would come with a water-cooled battery. During the Detroit Auto Show, when the car was trotted out again, VW released a new press release that stripped out the "water-cooled" language, but this change went unnoticed. During a recent VW event in Germany, a friend from Green Car Reports realized that the battery on display did not seem to have any water-cooling mechanisms. That set us off on a bit of a sleuthing and we have now learned that VW is not going to include any active cooling in the upcoming e-Golf. In fact, the company is entirely confident that this car - because of what it's designed to do - doesn't need it. "The need for a cooling system wasn't there" - VW's Darryll Harrison VW has been working on an electrified Golf for ages now, and so changes to the plan are to be expected. But battery cooling is vitally important not just to keep the car operating properly but because when things get too hot, there can be serious public relations problems. Nissan began testing a new battery chemistry for the Leaf in 2013 after an uproar from warm-weather EV drivers in Arizona who were experiencing worse-than-expected battery performance. The Leaf has always used an air-cooled battery, which is another way to say that there is no active cooling system (more details here). Tesla CEO Elon Musk once said this approach is "primitive." So, why is VW following the same path? We asked Darryll Harrison, VW US's manager of brand public relations west, for more information, and he told AutoblogGreen that VW engineers discovered through a lot of testing of the Golf Mk6 EV prototypes, that battery performance was not impacted by temperatures when using the right battery chemistry. That chemistry, it turns out, is lithium nickel manganese cobalt oxide (NMC) in cells from Panasonic. These cells had "the lowest self-warming tendency and the lowest memory effect of all cells tested," Harrison said. He added that VW engineers tested the NMC cells in places like Death Valley and Arizona and found they didn't warm very quickly either through operation, charging (including during fast charging) or through high ambient temps. "The need for a cooling system wasn't there," Harrison said.

Volkswagen Golf GTE Sport Concept debuts at Worthersee

Do you like hot Volkswagens? So do we. And that's why the annual Worthersee festival in Austria is a treat. It's where the Volkswagen Group shows off some performance-minded concept cars, like the GTI Clubsport or the 600-horsepower Audi TT. But VW wants to show that it's possible to increase performance while still maintaining some eco-friendly dignity. And that's where this striking Golf GTE Sport Concept comes in. The concept is powered by a three-motor plug-in hybrid system. There's a 1.6-liter turbocharged inline-four up front, with electric motors mounted at each axle. Total output is said to be 396 horsepower, which is enough to move the all-wheel-drive hatch to 62 miles per hour in 4.3 seconds, on its way to a top speed of 174 mph. It can drive under full electric power, act as a traditional hybrid, or go into full "GTE" mode, where the engine and both motors are on full assault. Its styling is definitely forward-thinking, with angles and creases abound. But it still retains that signature Golf C-pillar design, with a two-tier adaptation first seen on the outrageous GTI W12-650 concept from 2007. The body is largely constructed from carbon fiber and has doors that swing forward and up (think BMW i8). Volkswagen says the Golf GTE Sport Concept "bridges the gap between road cars and racing sport cars." That's evident inside the car, too. There's a rakish dashboard with a three-tier instrument display setup, and a very aggressive cockpit design for the two-seat cabin. Five-point seatbelts on each chair and a racing-inspired steering wheel really drive home the performance mindset of this concept. There's a lot more to learn in the detailed press release below. Check it out, but not before scrolling through the image gallery above. This one's certainly a looker. World premiere of the Golf GTE Sport: Plug-in hybrid sports car catapults the GT idea to the future - Lightweight and high-strength body of the Golf GTE Sport is made of carbon - Concept car with a top speed of 280 km/h is a zero emission vehicle and a race car in one Five key facts about the Golf GTE Sport: 1. Golf GTE Sport is powered by a 295 kW / 400 PS plug-in hybrid system 2. Progressive Golf GTE Sport bridges the gap between road cars and racing sport cars 3. Avant-garde exterior design of the Golf GTE Sport perfects the idea of C-pillars with two-level construction 4. Golf GTE Sport debuts with digital instruments arranged on three levels and tailored to motor racing 5.

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: