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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.

2014 Nissan Leaf price climbs $180 to $28,980*, Ghosn predicts sales doubling

A year ago, Nissan changed the fortunes of its all-electric Leaf in the US market by lopping a serious $6,400 off of the price. The entry-level 2012 Leaf started at $35,200, and the 2013 Leaf S instantly became a much better deal since it started at $28,800. For 2014, the trend is in the opposite direction, but only just. The 2014 Leaf S will start at $28,980. The other two trim levels will start at $32,000 for the SV and $35,020 for the SL. Oh well, we can't get a $6k drop every year, can we? What do you get for your extra $180? Well, as described in July, the 2014 model has the rear camera as standard and there is an available voice command navigation system and text message reader. We've got the full specification breakdown and pricing press release below. We doubt the small extra cost will do much to dent the Leaf's current sales upswing. December 2013 was the EV's best sales month ever, and a grand total of 22,610 units in 2013. That's more EVs than Nissan sold in 2011 and 2012 put together. Nissan CEO Carlos Ghosn said earlier today that he thinks US Leaf sales will double, but didn't say when. "We are now on a trend of 3,000 cars a month in the US, which is about 36,000 cars" a year, Ghosn told Automotive News. "The next step is moving up to 4,000 a month, which is going to be approximately 50,000." The prices listed above do not include Nissan's $850 destination fee, but all Leaf EVs can qualify for the $7,500 federal income tax credit, as well as state and local incentives in some areas. NISSAN ANNOUNCES U.S. PRICING FOR 2014 LEAF™ NASHVILLE, Tenn. (January 8, 2014) – Nissan today announced U.S. pricing for the 2014 Nissan LEAF™, which is on sale now at Nissan dealers nationwide. The 100 percent electric LEAF continues to offer outstanding value, with prices comparable to similar gasoline-powered vehicles after applicable tax credits. Sales of the zero emission LEAF in the U.S. and around the world set all-time records in 2013. The 2014 Nissan LEAF is available in three trim levels: LEAF S, SV and SL, along with option packages offering advanced systems such as Around View® Monitor and 7-speaker Bose® audio. Enhancements for 2014 include the addition of the RearView Monitor as standard equipment on all models (previously part of the Charge Package) and one new exterior color – Gun Metallic (seven total available colors).

Recharge Wrap-up: Tesla owner's garage makeover, Lucid signs deal with LG Chem

A Tesla owner has remodeled his garage to resemble a Tesla showroom. The Model S owner, who also runs Teslainventory.com, painted one wall a very specific shade of red, mounted a Tesla logo on it, and even bought the same table and stools used in some showrooms. He also documented the transformation, and gives tips on how other fans can give their own garage a makeover. Check it out in the video above, and read more at Electrek. Lucid Motors will source lithium-ion batteries from LG Chem. Lucid's batteries will use proprietary cell chemistry developed in partnership with LG. Lucid also has a battery supply deal with Samsung SDI for its first vehicle, but says it could use batteries for other companies through its own supply business, or for specific performance variants of its electric sedan. "The differing performance attributes available from the two cell suppliers provide Lucid with maximum flexibility to select the best cell for each application," Lucid says. Read more in the press release, or at Green Car Congress. Nissan, Renault, and Mitsubishi will share an electric vehicle platform. As other automakers are building their own mass market EVs, these three are teaming up in order to be able to offer their own models at prices competitive to their gasoline powered counterparts. According to the Nikkei, EVs from the three companies will all use the same platform as the upcoming 2018 Nissan Leaf, and will share motors, inverters, and batteries. Read more from Reuters, or at Green Car Reports. Related Gallery Lucid Motors EV Prototype News Source: Electrek, YouTube: DAErik, Lucid, Green Car Congress, Reuters, Green Car Reports Green Automakers Mitsubishi Nissan Tesla Renault Green Automakers Green Culture Electric Videos recharge wrapup