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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.

Infiniti Q50 BTCC ready to race

A few months ago, Infiniti announced it would field its Q50 sedan (or a racing derivative thereof) in the British Touring Car Championship, and now the Japanese automaker has revealed the tin-top racer in its final form as it prepares to roll onto the grid. Like the rest of the BTCC field, the Q50 racer is based on the series Next Generation Touring Car (NGTC) regulations. That means it's based on the production model, and not on a control chassis (like the one you'd find in NASCAR) done up to look like the showroom version. It also means a 2.0-liter turbocharged engine driving upwards of 300 horsepower through an Xtrac six-speed sequential gearbox with AP Racing clutch, throttle by wire and the manufacturer's choice of front- or rear-wheel drive, the latter of which we assume Infiniti has chosen for its touring car. Two examples of the Q50 BTCC will be fielded by Infiniti Support Our Paras Racing, a non-profit venture with proceeds (assuming there are any) going towards the British paratroopers' charity. The team is being run by Derek Palmer Sr, whose son Derek Jr will drive one, with the other piloted by Richard Hawken, and injured paratroopers filling out the pit crew and support staff. The Infiniti Q50 BTCC will be showcased on the Dunlop stand at the Autosport International show in Birmingham this weekend. NEW Q50 BTCC LIVERY AT AUTOSPORT INTERNATIONAL SHOW Wednesday, 7 January 2015 The recently announced 'Infiniti Support Our Paras Racing' team, which will contest the Dunlop British Touring Car Championship this season, will unveil a new livery for its two NGTC Infiniti Q50 race cars at the Autosport International Show in Birmingham later this week. The new livery on the Q50, being displayed on the Dunlop stand, has been designed by Infiniti's own design team in Paddington London, further enhancing the ongoing partnership of Infiniti with the Mallory Park-based team, which will employ injured ex-Paratroopers to prepare both race cars. Simon Cox, Infiniti Design Director from Infiniti Design London, said "The new Q50 race car livery was developed to contrast against the traditional branding schemes normally associated with the BTCC grid. However, it still retains a high level of visibility, reflecting both the dynamic qualities of the Infiniti Brand along with the performance and striking contours of the Q50 road car.

Nissan built a Skyline that you can almost live in

The Infiniti Q50 is pretty long in the tooth, but parent company Nissan is still trying to keep things interesting. In Japan it's sold as the Nissan Skyline, and a new concept based on the luxury sedan converts it into a space you could actually live in.  The cumbersomely named Nissan Skyline Contemporary Lifestyle Vehicle Concept adds a slew of convenience features that you should never use while driving. When parked, however, they turn your car into a little living room. For example, there's a little smartphone holder that folds out from the steering wheel so you can prop your screen up and watch a movie. If that's too small a viewing surface for you, the center infotainment touchscreen can be removed from its dashboard perch and used as a tablet. And if that's still too small for you, there's a screen mounted in the headliner above the rear seats. How do you watch a screen in that location? Glad you asked. The front seats, headrests, rear bench and passthrough to the trunk all lay flat in one uniform surface sleeping area. When lying down, the screen will be right above your head. And should you get cold, the driver's door panel pops open to reveal a blanket while the cupholder has a heating element to keep a beverage warm. On the flip side, should you get hot, a button on the inside B-pillar activates the air conditioning so you don't even have to sit up to access the climate control. While awake, you can avail yourself of multiple table surfaces located around the cabin. One folds out from the center console like on a business class airplane seat. A detachable sun visor also turns into a table. Then get a little work done by plugging in to either the 100-volt outlet in the passenger side mirror or an on-board portable battery. Obviously you wouldn't want to get your nice jacket wrinkled as you lounge in the car, so the grab handle above the door expands into a hanger wide enough to keep your coat uncreased. Other clever storage options include an umbrella compartment in the door sill, a bin located in the headrest, and a hands-free kick-activated locker below the rear bumper where a diffuser would reside. Perhaps most superfluous of all is a trash receptacle located in the driver's side mirror. You'd still have to empty it when full, but at least smelly garbage would be outside the car. Oh yeah, there's one final viewing surface, the largest of them all.