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Mitsubishi and Nissan teaming up on electric kei car

Nissan and Mitsubishi have announced plans to build an electric kei car together. The yet-unnamed car would mark a major step towards electrification of Japan's popular supercompact segment. The car will be powered by a 20 kWh battery and will be engineered to cover daily driving duties in a Japanese driving cycle. The car can also double as a mobile power source or power a home in emergency situations. Nissan says the car will measure 134 inches long, 58 inches wide, and 65 inches tall, in order to comply with laws limiting kei car size. The companies state that the car will be developed by NMKV Co., Ltd., a joint-venture that stands for Nissan Mitsubishi Kei Vehicle. Each carmaker owns a 50 percent stake, and already jointly builds models such as the feline favorite Nissan Dayz, which Mitsubishi sells as the eK. In reality, that likely means Mitsubishi will be developing the car and Nissan will simply slap a badge on it. Nissan has not traditionally built kei cars, choosing instead to rebadge those made by Suzuki or Mitsubishi. In fact, Mitsubishi built the first electric kei car, the i-Miev, way back in 2009, and it was actually sold in the U.S. until 2017. The jellybean-shaped EV was a pioneer in the field, but its 62-mile range from a 16 kWh lithium-ion battery showed the limitations of the technology at the time. Mitsubishi moved about 32,000 of them before they pulled the plug, with a pre-tax-credit price ranging from $23,000 to $31,000. The new Nissan-Mitsubishi kei car will land at around 2 million yen, or $18,200. The price, while slightly more expensive than a gasoline counterpart, bucks predictions from analysts that said prices would skyrocket by 66 to 120 percent if kei cars were forced to electrify. A petrol-powered Nissan Dayz starts at around $15,200. Size-wise, the two share a similar footprint as they are governed by kei car size limits. The special class of cars get unique license plates and other registration cost benefits due to their compact dimensions. A BMW i3 would exceed those boundaries due to its 158-inch length and 70-inch width. However, the larger EV comes equipped with a substantially bigger 42.2 kWh battery good for 152 miles of range. Though no photos have been released, we predict it will look like the iMk concept (pictured above). The car will go on sale in spring 2022. Related Video This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

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.

This map reveals the cleanest vehicles based on location

Naysayers love to point out how dirty the electricity grid mix is when it comes to charging electric vehicles. Curmudgeons are eager to jump into any conversation about EVs to enlighten the lucky listeners about how plug-in cars contribute to pollution, sometimes even throwing in a dash of climate-change denial for good measure. (Thanks, buddy. Pray, tell me more about the plight of oppressed SUV owners.) Unless someone buys an EV just because they think they're cool (which, yeah, they often are), they probably have at least a passable understanding of their environmental pros and cons. As many EV owners are already aware, location has a lot to do with any particular plug-in car's carbon footprint. Still, there's always more to know, and knowledge is not a bad thing, especially if one uses it to do the right thing. That's why this handy-dandy map from Carnegie Mellon University is so interesting. CMU researchers have compiled information about the lifecycle greenhouse gas emissions of various EVs based on where they're charged, as compared to gasoline-powered vehicles. The researchers looked at the Nissan Leaf, Chevrolet Volt, and Prius Plug-In Hybrid versus the gasoline-dependent Toyota Prius hybrid and the stop-start-equipped Mazda3 with i-ELOOP and compared grams of CO2 emitted per mile. CMU takes into account the grid mix, ambient temperature, and driving patterns. CMU takes into account the grid mix based on county, as well as ambient temperature and driving patterns in terms of miles traveled on the highway or in the city. For instance, if you drive a Nissan Leaf in urban areas of California, Texas, or Florida, your carbon footprint is lower than it would be if you were driving a standard Toyota Prius. However, if you charge your Leaf in the Midwest or the South, for the most part, you've got a larger carbon footprint than the Prius. If you live in the rural Midwest, you'd probably even be better off driving a Mazda3. Throughout the country, the Chevrolet Volt has a larger carbon footprint than the Toyota Prius, but a smaller one than the Mazda3 in a lot of urban counties in the US. The Prius and Prius Plug-In are relatively equal across the US. Having trouble keeping it straight? That's not surprising. The comparisons between plug-in and gasoline vehicles are much more nuanced than the loudest voices usually let on.