2008 Infiniti G37 Journey 3.7l V6 Rwd Coupe Repairable Rebuilder Easy Fix 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.

Recharge Wrap-up: Q50 Hybrid video, Iran's biodiesel weed

A new video from Infiniti showcases the Q50 Hybrid's kinetic energy recovery technology, borrowed from Formula One. The video details what is going on inside both the Q50 Hybrid and the racecar when it gathers energy to store for later use, offering better performance than an internal combustion engine alone. In the Q50 Hybrid, that electric energy helps the car accelerate from 0-60 in 4.9 seconds. The video also serves to highlight the relationship between racing innovation and performance and efficiency improvements in production vehicles. See the video above. The 2015 Toyota Prius C has been named a Top Safety Pick by the Insurance Institute for Highway Safety (IIHS). The compact hybrid, updated for the 2015 model year, has been upgraded from a "poor" to "acceptable" rating in the small overlap crash test, placing it on the Top Safety Pick list. Beginning in the 2016 model year, cars will have to score a "good" rating on the test to make the list, which means further improvements will be necessary if Toyota wants the Prius C to maintain its safety status with the IIHS. Read more at Green Car Reports. A couple in Tennessee have been found guilty of scamming the state in a fake biodiesel scheme. John and Lisa Brichetto's Northington Energy LLC received a state loan to produce biodiesel in 2011, but the facility never started production and was later foreclosed upon. In addition to the $142,215 the Brichettos defrauded from Tennessee, the state also invested in utilities and roads, while the US Department of Agriculture also paid for site improvements. Read more from the Times Free Press. Researchers in Iran have developed a way to make biodiesel from a weed. Scientists at the Islamic Azad University have created two liters of biomass for biofuel from flixweed. Flixweed, also called herb-Sophia and tansy mustard, is a non-edible weed that grows in various climates with little to no effort. It was found to contain 22 percent oil and fatty acids, and the biomass contains oxygenated chemical components. "This issue is important because the atomic oxygen in the fuel of a car directly cuts exhaust and the dangerous carbon monoxide and cancerous particles suspended in air," says Mehdi Alami, a chemistry graduate working on the project. Read more at Press TV.

Infiniti showcases Vision Gran Turismo concept in the metal

Automakers have been clamoring to convey their ethos to a new generation and cast their brand in a positive light through the Vision Gran Turismo series. But while these concepts are designed for the virtual reality of Gran Turismo 6, some automakers have gone a step further by pulling their creations out of cyberspace and rendering them in the metal. And that's just what Infiniti has done with its design. Infiniti revealed its Concept Vision Gran Turismo back in December, striking a a sleek, low-slung form that looks more polished than a racing car but more track-focused than most concepts. It's powered (at least hypothetically) by a 4.5-liter V8 hybrid powertrain, with center-lock carbon-fiber wheels and rearward-biased 45/55 weight distribution. It's the kind of beast we'd love to drive, but while that may only be possible on Playstation, at least we know it does exist in physical reality – even if only as a full-scale model. Infiniti showcased it alongside the Q80 Inspiration and Q60 Concept at an exclusive event during the Shanghai Motor Show last week, but just revealed the photos now, so you can scope them out in the slideshow above. Related Video: Show full PR text INFINITI VISION GT DISPLAYED OUTSIDE ITS ONLINE WORLD FOR THE FIRST TIME SHANGHAI, China – Last week at the 2015 Shanghai auto show, Infiniti held its inaugural Infiniti Design Night ahead of Auto Shanghai 2015. The evening occasion took place at the Shanghai Himalayas Art Museum. Under the theme of "Aesthetics of Contrast," Infiniti Design Night showcased three design concepts showing an exciting path to Infiniti's future: the Q80 Inspiration (first shown in Paris, October 2014), Q60 Concept (Detroit, January 2015), and the Vision Gran Turismo designed especially for the latest Gran Turismo® 6™ video game. This was the first time the Vision GT was displayed as a real "flesh and bones" concept car, having only been seen and experienced digitally in GT6 prior to this event. The dramatic Infiniti Concept Vision Gran Turismo The Infiniti Concept Vision Gran Turismo is a vision of what a high performance Infiniti could look like in the future. Available for download in GT6 exclusively on the PlayStation®3 system, it was created through close collaboration with the creators of Gran Turismo®, the racing game franchise developed by Polyphony Digital Inc. that has sold more than 72 million copies worldwide.