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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.

10 automakers sued over keyless ignitions

Keyless ignition has rapidly proliferated throughout the auto industry to become a fairly normal feature on new cars. It's supposed to offer the convenience of keeping the fob in your pocket and just pressing a button to drive away. However, ten major automakers are now being sued in US District Court over claims that the system is dangerous, Reuters reports. The suit alleges that people are forgetting to shut off the engine, and the lack of an idle timer is the cause for 13 deaths by carbon monoxide poisoning and multiple injuries. The suit currently includes 28 plaintiffs, according to Reuters, but the lawyers are asking for class-action status to potentially add many more. The case goes after a major swath of the industry, including BMW, Daimler, FCA, Ford, General Motors, Honda, Hyundai, Nissan, Toyota, and Volkswagen, plus their related brands like Acura, Infiniti, Mini, and Lexus. In all, over five million vehicles are affected. The assertion here is that people walk away from their vehicle without shutting it off because they believe the engine shuts off automatically. If parked in a garage, carbon monoxide can build up, leading to poisoning. The lawyers claim automakers know this is a problem and also cite 27 complaints to the National Highway Traffic Safety Administration about the issue, according to Reuters. The plaintiffs are asking for an automatic shut-off and damages from the companies. These concerns have come up before, though. Toyota previously faced a lawsuit over a carbon monoxide death after a woman accidentally left her Lexus running. Also earlier this year, GM recalled 64,186 examples of the 2011-2013 Chevrolet Volt because owners weren't shutting them off. The problem resulted in two injuries, and the company released a software update to limit the idling time.