2008 Infiniti G35 X Sedan 4-door 3.5l, Leather Seats, Navigation, Back Up Camera on 2040-cars

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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.

Race Recap: 2015 Hungarian Grand Prix is Magyar for 'What a race!'

Every driver on the Formula 1 grid dreams of taking home the silverware, but only one driver each year can do it. Barring disaster in 2015 it looks like it's going to be Lewis Hamilton. The Brit has been so dominating at the front of the grid on Saturday, we can't see how he'll miss out on winning the second annual FIA Pole Position Trophy. That's the accolade introduced last season in another manufactured attempt to give drivers something to work for on Saturday, since the FIA felt leading into the first corner didn't have the pull it used to. Hamilton took his ninth pole of the season in Hungary for Mercedes-AMG Petronas with a crushing lap that put him almost six tenths ahead of his teammate Nico Rosberg in second. All Hamilton needs is one more spot at the top of the grid this season, and he's the Pole Position trophy winner. Thrilling stuff. Behind Rosberg the gaps stayed smaller, Sebastian Vettel in the Ferrari a little more than a tenth behind Rosberg, Daniel Ricciardo in the Infiniti Red Bull Racing less than four one-hundredths behind Vettel. We feel almost as vexed watching Kimi Raikkonen as he feels driving – he's finally got a good Ferrari, now he can't get a good weekend. The front wing broke on his car in Free Practice 1, then a water leak in Free Practice 3 robbed him of setup time on the soft tire. He lines up in fifth about two tenths behind Ricciardo. The slow, tight Hungaroring didn't agree with the Williams chassis, Valtteri Bottas the first of the Grove team drivers in sixth, his teammate Felipe Massa two places back. Between them is Daniil Kvyat in the second Red Bull in seventh. Teenager Max Verstappen put in a good showing in the Toro Rosso to grab ninth, while Romain Grosjean in a wriggling, squishy, sliding Lotus classified his appearance in Q3 at all as "a miracle." As for the race that followed, we don't expect to see another like it for a long time – it was the real thrilling stuff, one shock after another. The drama began after the first parade lap, when Felipe Massa lined up out of position and the start was aborted. The drivers did another parade lap, then lined up with everyone in place. Mercedes got swamped as soon as the lights went out. Vettel ran around both of them and led the race into the first turn, Raikkonen had come from fifth to third by Turn 1, then got the inside line on Rosberg through Turn 2 to take second place.

2014 Infiniti Q50's novel drive-by-wire steering system recalled

The gradual replacement of mechanical components in automobiles with electronic systems brings with it definite advantages, but also poses certain potential dangers. Just think of the inevitable problems you've encountered with the computer on which you're reading these words and you'll know what we mean. But a computer crashing isn't as problematic as your car going on the fritz when its electronic systems fail.
That's what Infiniti is being reminded of with its new drive-by-wire electronic steering system. The Japanese automaker developed and installed the Direct Adaptive Steering System in its new Q50 sedan, but a small number of those cars on the road are now being recalled due to that system.
According to the National Highway Traffic Safety Administration, on a small number of examples, the Q50's optional by-wire system may fail if the temperature in the engine compartment drops below freezing. There's a backup mechanical setup in place should the electronic system fail, but NHTSA says that the backup system may also fail to engage in time to avoid a crash.