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Honda patents engine with different cylinder displacements

A basic rule of engine design states that the displacement of a cylinder is equal to the engine's total displacement divided by its cylinder count. Honda, according to a recently surfaced Japanese patent, is looking to break that rule with an engine containing cylinders of different sizes. We've done our best to translate it from patent-ese. The idea is that different-sized combustion chambers give more flexibility when any combination of cylinders are deactivated, or rested. Because the different numbers can be combined in various ways, it provides more and smaller increments than would an engine with equal-displacement cylinders. Take a 2.0-liter four-cylinder, for example. Following the golden displacement rule, each of the four cylinders has a volume of 500 cc, giving displacement increments of 500 cc when any cylinder is deactivated. But suppose instead that the four cylinders displace 300, 425, 600, and 675 cc, respectively. This would give the engine 15 available displacements instead of just four, and the spacing between each option would be far less than 500cc. As a result, those different virtual displacements would provide more adjustment between power and efficiency than a cylinder-deactivation system can on a conventional engine. Honda's patent describes cylinders with equal bore size, with the displacement from cylinder to cylinder varying based on the crank throw radius – the longer the throw, the longer the stroke and the larger the displacement of that particular combustion chamber. The patent describes how the cylinder sizes would need to be arranged to spread the load on the crankshaft and presumably limit vibration that would be introduced by the different pulse magnitudes. If we're interpreting things correctly, the largest cylinder (the one with the longest crank throw radius) sits in the middle of the bank with the smaller ones alternating on either side as they decrease in displacement. This concept is described for multi-cylinder inline and V-type engines of various sizes. The patent was filed in March of 2014 and published in January of this year. Whether or not this arrangement will reach production is of course unknown, but the advantages in terms of both efficiency and power seem promising. Related Video: News Source: Japan Patent Office via Auto Guide Green Honda Fuel Efficiency Technology patent

Compact SUV Comparison: Specs, pics and reviews of every brand's crossover

Honda CR-V vs Toyota RAV4. Chevy Equinox vs Ford Escape. Mazda CX-5 vs Subaru Forester. Whichever combinations of compact crossover SUV you're considering, there's probably a comparison test or chart out there to read. Heck, you can even create a three-car comparison yourself here at Autoblog. However, if you want a bunch of that information all in one convenient place, well, here it is. Our mega comparison of specs, features and photos of compact SUV entries from every mainstream manufacturer that sells them. That includes the 2018 Chevrolet Equinox, 2018 Ford Escape, 2018 GMC Terrain, 2018 Honda CR-V, 2018 Hyundai Tucson, 2019 Jeep Cherokee (it's already on sale with notable changes from 2018), 2018 Jeep Compass, 2018 Kia Sportage, 2018 Mazda CX-5, 2018 Mitsubishi Eclipse Cross (none of Mitsu's SUVs are perfect fits for this segment, so we deemed the MEC the most competitive fit), 2018 Nissan Rogue, 2018 Subaru Forester, 2018 Toyota RAV4 and 2018 Volkswagen Tiguan. We can update this comparison as more information about 2019 models is released, most notably the Forester and RAV4. Now, there are certainly some models that are smaller (Nissan Rogue Sport) or larger (Kia Sorento) that could also be considered, but we figured it was wise to stick with those in this sweet spot of comparable size and price. We also included links to Autoblog reviews, buying guides and smaller comparisons. Engines and Transmissions With rare exception, this segment features four-cylinder power. Sometimes it's turbocharged, often its not, but standard engine outputs are generally in the same ballpark. Therefore, we'd recommend focusing on torque output, as it's what will make a difference around town or when passing, and weighing that versus fuel economy (the Chevy Equinox, GMC Terrain, Honda CR-V and Mazda CX-5 make particularly strong cases in this regard). Many drivers aren't too fond of continuously variable transmissions (CVT), either, so that's another thing to consider and note during a test drive. As you can see, several models are available with performance upgrades. Besides the Jeep Cherokee's available V6, all are more powerful turbocharged four-cylinder engines. The exception to this would be the Honda CR-V and Ford Escape, as their 1.5-liter turbo engines don't prioritize performance. Instead, they serve as overall upgrades to the base naturally aspirated engines standard on only their base trim levels (CR-V LX and Escape S).

Japanese automakers kick in $800k for new charging-station company

Cynics may say that gathering $800,000 (total) from four of Japan's largest automakers is merely a rounding error. Still, Toyota, Nissan, Honda and Mitsubishi, along with the Development Bank of Japan, are putting those funds to good use. So, that's something. Last week, those five entities officially founded Nippon Charge Service LLC. The company was established to promote plug-in vehicle charging installations across Japan and the automakers seeded it with 80 million yen, or about $786,000 US. Those funds will be used to help business owners deploy charging stations at convenience stores, highway-side locales and other locations that will make it easier for plug-in vehicle drivers (of Toyotas, Hondas, Mitsubishis and Nissans, obviously) to get their juice. The automakers first announced they'd collaborate last year, when they said they'd work with the Japanese government to more than triple the country's publicly accessible chargers to about 17,000 units. No targets were disclosed as far as how many charging stations would be deployed this time out, but, in a move similar to the EZ Charge system in the US, Nippon Charge Service will also have universally-accepted charging cards available by the end of the year to drivers all of those brands' plug-in vehicles to make the charging process a little more seamless. Check out Honda's press release below. Japan Automakers Advance Electric Charging Infrastructure with New Company, Nippon Charge Service -Established to help build charging infrastructure for electric-powered vehicles (PHVs, PHEVs and EVs)- Toyota Motor Corporation Nissan Motor Co., Ltd. Honda Motor Co., Ltd. Mitsubishi Motors Corporation Development Bank of Japan Inc. TOKYO, Japan, May 30, 2014 - Toyota Motor Corporation, Nissan Motor Co., Ltd., Honda Motor Co., Ltd., and Mitsubishi Motors Corporation jointly established a new company, Nippon Charge Service, LLC, on May 26 to promote the installation of chargers for electric-powered vehicles (PHVs, PHEVs, EVs). The goal is to help build a charging network that offers more convenience to drivers in Japan. The new company will promote the installation of chargers, for the good of society and to expand the use of electric-powered vehicles. Related industries are also expected to benefit. Development Bank of Japan Inc.