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Infiniti replaces Americas chief

The Nissan-Renault alliance has been something of a revolving door for high-level executives of late, and the latest shakeup comes at its luxury unit, Infiniti, where Michael Bartsch (shown above) has been replaced as vice president of its Americas division by Randy Parker. Bartsch had a short tenure – he only took the helm in September 2013. In a press release, Infiniti said he was leaving to "pursue other interests." Bartsch, a veteran of more than 30 years in the auto industry, came to Infiniti from Porsche. Parker comes from within the Nissan empire, formerly heading up the company's sprawling west region, including its marketing, distribution and dealer network. Before that, he served stints at GMAC and General Motors. Bartsch isn't alone in leaving Renault-Nissan recently. Ex-Renault COO Carlos Tavares took the top spot at Peugeot, Infiniti boss Johan de Nysschen left for Cadillac and Nissan executive vice president Andy Palmer took over at Aston Martin. Scroll down for the full press release from Infiniti. Feb. 17, 2015 Infiniti Motor Company announces leadership change at Infiniti Americas NASHVILLE - Infiniti Motor Company, Ltd. today announced a leadership change at Infiniti Americas aimed at growing the brand's presence in the U.S. Randy Parker is appointed Vice President, Infiniti Americas, effective immediately. He succeeds Michael Bartsch who will leave the company to pursue other interests. Most recently, Parker, 48, was Vice President, Nissan West Region, Nissan North America, Inc. "Randy has been a key contributor to the growth of Nissan in the United States," said Jose Munoz, chairman, Management Committee, Nissan North America and executive vice president, Nissan Motor Co., Ltd. "He has overseen strong growth for the Nissan brand in our western region, and we look forward to the skills that he will bring to Infiniti." "It is our pleasure to welcome Randy Parker to Infiniti," said Roland Krueger, president of Infiniti Motor Co., Ltd. "Randy will be responsible for accelerating Infiniti's progress in our largest worldwide market and driving our brand transformation as we execute an expanded product portfolio of premium luxury products." Most recently, Parker was responsible for regional marketing, distribution, dealer network development and financial controls for Nissan's largest U.S. regional operation.

Recharge Wrap-up: Mercedes-Benz B-Class Electric Drive goes on sale in Europe, Spain gets Nissan Leaf taxis

The new Mercedes-Benz B-Class Electric Drive goes on sale in Europe on November 3, with deliveries starting before the end of the year. Developed with the help of Tesla, the new electric B-Class offers more than 132 kilowatts (177 horsepower) and 250 pound-feet of torque. It features Economy Plus, Economy and Sport driving modes. An optional radar support system uses the collision prevention assist sensors to help make smarter decisions about when and how to use the regenerative braking. The B-Class Electric Drive also offers an optional Range Plus button, which can unlock more battery capacity when charging for the occasional longer drive. Learn more in the press release below. Racing returns to the streets of Miami for the first time in more than a decade for the Formula E Miami ePrix on March 14, 2015. Formula E has revealed the track layout, which takes the race around the Miami Heat's home court, American Airlines Arena, along the Biscayne Bay. "This event will help to make Miami more of a sports city," says Mayor Thomas Regalado. "In addition, we will show the younger generations that you may have motor racing without noise or pollution." Read more about the event at the Formula E website and see the track layout in detail here. Hyundai has delivered the first ix35 Fuel Cell vehicles to customers in the UK, including clean energy company ITM Power. ITM is responsible for three of the hydrogen refueling stations being built around the EU as part of the Hydrogen For Innovative Vehicles project - the same project that helped bring the Hyundai ix35 (also known as the Tucson) Fuel Cell to Europe. ITM's 700-bar hydrogen stations will be built in London by Spring 2015, each with its own electrolyzer system on site. In the meantime, ITM will use the ix35 for commutes between London and Sheffield, refueling at a site that uses wind-generated electricity from an on-site turbine to power the electrolyzer to make the hydrogen. Learn more in the press release below. Demand for aluminum is expected to climb as China builds more electric cars. Aluminum supplier Novelis says demand will likely increase 30 percent annually for the next 10 years in China, Japan and Korea, and possibly more depending on how China's plan to increase EV use and decrease air pollution shakes out. Read more at Bloomberg. Barcelona and Madrid have received their first all-electric taxis in the form of Nissan Leaf EVs.

Infiniti's new VC-T changes the rules of small turbocharged engines

The upcoming Infiniti QX50 crossover does not get our pulse racing, no matter how shapely the QX Sport Inspiration concept that previews it may be. No midsize SUV does, to be fair. But it has something special under the hood – the world's first production variable-compression-ratio engine. That means the QX50's 2.0-liter turbo four, which makes 268 horsepower and 288 pound-feet of torque, will have up to 27 percent better fuel economy. Here's how it works. The trend of moving to smaller, turbocharged engines carries with it one big falsehood. Under low load when the turbo isn't needed, these engines are less efficient than an equivalent engine without a turbo because of the low compression ratio the turbo requires. That is, if you never need the extra power, you're wasting fuel. Turbocharged (and supercharged) engines use a lower compression ratio to prevent detonation. When you force extra air in a cylinder and mix it with fuel, it's more likely to prematurely go boom. Lowering the compression ratio prevents this problem, but it's less efficient. Infiniti's VC-T promises the best of both worlds, with a compression ratio that ranges from 8.0:1 for high-power turbo needs to a 14.0:1 ratio for fuel-sipping efficiency. At its heart the VC-T engine is a simple idea, but it's complicated to explain. Consider yourself warned. The photo below from Infiniti serves as a good visual overview. For the truly nerdy, this patent application covers the mechanical concept. Instead of having the pistons connected to the crankshaft, Infiniti's engine has a pivot arm with a connection on each end. One end connects to the piston, the other connects to a second lower shaft, which is controlled by an actuator arm. At any given time the engine's pistons move up and down according to the lobes on the crankshaft. But the actuator arm can change the angle of the pivot arm up and down. That is, the pistons still move in the same motion with the same stroke, but phase the entire stroke up or down. Move the pivot up and there's less room at the top, which means a higher compression ratio. Move the pivot down and the compression ratio goes down, too. As an added bonus, the lower shaft eliminates the need for counter-rotating balance shafts. Infiniti says this system works constantly and can vary the compression ratio to any number between 8:1 and 14:1. It also uses electronic variable valve timing on the intake valves to switch into Atkinson-cycle combustion for greater efficiency.