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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.

Fisker stock trades halted as talks with Nissan collapse

Fisker's talks with a large automaker for a potential deal have collapsed, it said on Monday amid growing uncertainty for the cash-strapped startup that last week paused electric-vehicle production.  Trading in the shares of the company, which did not name the automaker with which it was in talks, has been halted pending an announcement.  Fisker also said it will not be able to meet a closing condition related to its attempt to raise up to $150 million in funding by selling convertible notes after missing an interest payment.  Separately, Fisker said it would ask investors to vote on a proposal for a reverse stock split at a shareholder meeting on April 24, as it looks to maintain compliance with the Nasdaq's listing norms.  Reuters had reported earlier this month that Nissan was in advanced talks to invest in the company, however, earlier in the day, the Japanese automaker held an event in which it announced a long-term business plan, including its EV strategy, and said it was looking for partners in the United States.  Raising funds has been hard for loss-making electric vehicle startups, which have little in way of revenue as they struggle to ramp up production and deliver to customers, as the companies battle stiff competition and a tough economy.  The EV startup's shares have cratered this year, losing more than 90% of their value, after it flagged going concern risk in February and paused investments in future projects until it secured a partnership with an automaker.  Fisker pivoted to a dealer-partner model earlier this year, after it delivered less than half of the vehicles it made in 2023 due to logistics issues.    Earnings/Financials Fisker Nissan

Hot Wheels' 2022 Green Speed cars bring EVs to small scale

With more and more EVs hitting the market, it was only a matter of time before the new breed of cars would find representation in diecast form. For 2022, Hot Wheels is coming out with a new Green Speed series that puts the spotlight on a diverse lineup of electric cars. The five-car series features a fun mix of EVs from different manufacturers and in a wide range of styles. Some are completely bone stock. For a traditional luxury sedan, there's a Lucid Air in silver, complete with glass (or in this case, clear plastic) canopy. For fans of Teutonic 4-door "coupes" there's the Audi RS e-Tron GT in Daytona Gray. Ticking the truck box is a Hummer EV in a yellow that can only be described as a throwback to the H3. But because this is Hot Wheels, there are "hot-rodded" variants in the lineup as well. Rather than just a regular Nissan Leaf, they've elected to cast the carbon fiber-bodied NISMO RC 2.0 race car. Likewise with Ford, instead of the standard Mustang Mach-E, they've gone with the Mustang Mach-E 1400 drift car. This isn't the first time Hot Wheels has put out a Green Speed series. The line debuted in 2016 but reflected the limited EV choices in the real car market at the time. The only non-fantasy cars in the series were a first-gen Tesla Roadster, a Tesla Model S, and Chevy Volt. Hot Wheels revisited the line again in 2019, this time adding a Tesla Model 3 and a Porsche Panamera Turbo S E-Hybrid Sport Turismo. Hot Wheels also makes other mini EVs that don't fall into this specific line of models. If you want to collect 'em all, there's the second-generation Tesla Roadster concept, Cybertruck, Jaguar I-Pace, Pininfarina Battista, Porsche Taycan, and a Volkswagen ID R. Similarly, Matchbox has released a version of the Tesla Roadster with sustainable packaging to boot. If you must have an old school gasoline burner, Hot Wheels has plenty of options for you too, like, say, this snazzy FJ60 Toyota Land Cruiser. The 2022 Hot Wheels Green Speed series should be on shelves at your local retailers now. Related Video: