Nismo Lifted Coil-over Shocks Total Chaos A-arms Axel Lock All-terrain Tires on 2040-cars

Auto blog

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.

Recharge Wrap-up: Nissan UK battery plant, Hyundai EV/FCEV station

Hyundai has opened a joint hydrogen fueling/EV charging station in South Korea. Called a "Fusion" station, it allows customers to take advantage of both types of alternative energy Hyundai uses for its vehicles. The station in Gwangju began as a hydrogen station, and EV charging capability was added recently. While users will have in common the use of green energy to power their vehicles, it will be interesting to see if spontaneous debates erupt between drivers over the merits of the two alternative powertrains. Hyundai will now use the hydrogen fueling part of the station to study fuel usage. Read more at Inside EVs. EV charging company EverCharge is teaming up with Schneider Electric to provide charging infrastructure to multi-tenant buildings. Because of the limited electricity for buildings like apartments, condominiums and offices – as well as the fact that multiple occupants often share power – installing charging at such locations has been challenging. EverCharge's SmartPower technology senses excess or limited power supply, and uses it to charge multiple vehicles accordingly. The groups will use this technology along with Schneider Electric's EVlink Home EV Charger to provide charging services at these otherwise difficult locations. Read more at Green Car Congress, or at the EverCharge blog. Nissan will build fourth-generation lithium-ion batteries for the Leaf at its plant in Sunderland, England. The announcement comes amidst rumors of the automaker outsourcing battery production. The decision means that Nissan's $37.5 million investment will preserve 300 jobs at the plant. The factory currently manufactures second-generation, 24-kW Leaf and e-NV200 batteries, and imports the third-generation, 30-kW Leaf battery from Nissan's plant in Smyrna, Tennessee. "Today's announcement reflects Nissan's intention to remain EV leaders for many years to come, with our European operations at the heart of our future innovations," says Nissan Europe Chairman Paul Willcox. Read more at Automotive News Europe, and in the press release below.

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.