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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

Bisimoto's 911 and Honda Odyssey each pack 1,000 hp

There aren't a lot of vehicles on the road that pack a thousand horsepower. The Bugatti Veyron and McLaren P1 are in rare company, but there have been a handful of aftermarket tuners that have managed to extract that much power out of lesser vehicles. Bisimoto is responsible for more than its fair share, so Matt Farah and the team at Drive stopped by the workshop in Southern California to check out the craftsmanship for the latest episode of Tuned. What they found is two vehicles with that astronomical four-figure output that otherwise couldn't be more different from each other. First up is the vintage, stripped-out 911 that company founder Bisi Ezerioha built for himself. It's based on a 1976 Porsche 911 Carrera with a widebody kit and a pair of turbochargers hanging off the back. The result is that thousand-horsepower output and, as Farah found out, one of the scariest, hairiest, and squirliest automobiles ever devised. As if that weren't enough, there's a thousand-horsepower minivan on the docket, too. This one is based on a Honda Odyssey, rebuilt on an air suspension and a six-speed manual gearbox conversion out of an Acura TL. And of course the engine's been tuned to deliver that headline output figure. Honda and Bisimoto showcased the vehicle at the SEMA show a couple of years ago, where Farah says he didn't think it could possibly hold together. But as he discovered in the video above, it actually does, and accelerates with tenacity... and plenty of room for the kids.

2024 Land Cruiser-palooza and 2023 Mercedes-AMG C 43 | Autoblog Podcast #792

In this episode of the Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Associate Editor Byron Hurd for a news-packed discussion that starts with the story of the week: the official return of the Toyota Land Cruiser for 2024. That's not the only big news item to cover since our last installment, however. Seven major automakers have announced a joint venture to create an "open" American EV charging network as an alternative to Tesla's Supercharger network. Also, Mini showed off a new digital dashboard. After news, Byron talks about his time with the sporty 2023 Mercedes-AMG C 43 and Greg closes the book on the 2023 Honda Accord Hybrid. After that, they spend your money. This week, it's a European sedan showdown with a modern twist.  Send us your questions for the Mailbag and Spend My Money at: Podcast@Autoblog.com. Autoblog Podcast #792 Get The Podcast Apple Podcasts – Subscribe to the Autoblog Podcast in iTunes Spotify – Subscribe to the Autoblog Podcast on Spotify RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown What we're driving 2023 Mercedes-AMG C 43 2023 Honda Accord Hybrid News 2024 Toyota Land Cruiser debuts with retro looks, mid-$50,000 price 7 major automakers to build open EV charging network 2025 Mini Cooper reveals its OLED screen, retro gauges and dog assistant Spend My Money Feedback Email – Podcast@Autoblog.com Review the show on Apple Podcasts Autoblog is now live on your smart speakers and voice assistants with the audio Autoblog Daily Digest. Say “Hey Google, play the news from Autoblog” or "Alexa, open Autoblog" to get your favorite car website in audio form every day. A narrator will take you through the biggest stories or break down one of our comprehensive test drives. Related video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.