2011 G37s Infinity Hard Top Convertible 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.

2021 Infiniti Q50 gains more safety equipment and sporty-looking Sensory trim

Details for the 2021 Infiniti Q50 are out, and while it’s largely the same sedan as it was last year, Infiniti made some notable improvements. For starters, Infiniti made its suite of driver assistance equipment standard. This includes blind-spot warning, adaptive cruise control, lane departure warning, 360-degree camera with moving object detection, parking sensors, backup collision assist and auto high-beams. ItÂ’s a fairly comprehensive package that many luxury brands would make you pay a pretty penny for. Additionally, Infiniti is adding a Sensory trim level for 2021. ItÂ’s equipped with the 300-horsepower version of the 3.0-liter twin-turbo V6 engine. Infiniti also equips it with sport design front and rear fascias, leather sport seats, black open pore wood interior trim, black headliner and pillars and a 16-speaker Bose audio system. Both the Sensory and Red Sport 400 gain power-folding, auto-dimming outside mirrors in the new year, too. Appearance changes for the Red Sport 400 include a new matte black carbon fiber interior trim package and more black exterior trim highlights. You can see the carÂ’s slightly more menacing look in the photos at the top of this post. The rest of the Q50 lineup gains two new color options: Slate Gray and Grand Blue. Pricing for the base Q50 hasnÂ’t budged in the new year. Rear-wheel-drive models will still start at $37,625 and all-wheel-drive versions will begin at $39,625. The 2021 Infiniti Q50 is arriving in dealerships now. Related Video:

Infiniti's Detroit concept to be 'very, very, very, very close' to new Q60

Add one more vehicle to the tally of reveals slated for the 2015 Detroit Auto Show. Alfonso Albaisa, executive design director at Infiniti, has confirmed that the marque will be showing a new concept on January 13, the second media day. More importantly, though, this concept won't be another flight of fancy like many of Infiniti's past show cars. Instead, it will foreshadow the arrival of a replacement for one of its oldest vehicles, the Q60, a model better known as the G37 Coupe. "On January 13, you're going to see a concept car that's very, very, very, very close to the next Q60," Albaisa told Motor Trend. There isn't much to go on beyond that, sadly, although we are free to speculate. Infiniti's past would indicate that the Q60 would carry on its role as a two-door version of the Q50 sedan, with styling influenced by its four-door sibling. While that makes sense, there's also an argument to be made for departing from the Q50's styling in favor of a more expressive look that could allow the two-door model to stand out. Whichever avenue Infiniti chooses, we'll have an even better idea in just a few short months.