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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

McLaren and Honda rekindle a winning combination

With the 2014 Formula One World Championship now drawn to a close, all eyes are fixed on next season. And for both McLaren and Honda, that means the dawn of a new era – or hopefully, the return to one bygone. After twenty years running Mercedes engines, McLaren is switching back to Honda next season, rekindling the most successful partnership the once-dominant team has ever had. Immediately after swapping to Honda power in 1988 – and with Ayrton Senna and Alain Prost behind the wheel – McLaren entered its winningest era, racking up four consecutive world championships. In the two decades it's spent under Mercedes power since, it won three drivers' titles and one constructors', leaving the relatively brief Honda era as its most successful. It was also the most successful for Honda, which had enjoyed success with Williams and some with Lotus, but far more with McLaren – the likes of which it was never able to recreate. The Japanese automaker that was the first to break into the Euro-centric series left grand prix racing when it left McLaren, and despite returning to fund its own team for the better part of a decade, claimed but one checkered flag before calling it quits again. Whether the new collaboration will return both outfits to the winner's circle remains to be seen, but we're looking forward to finding out. In the meantime, after releasing a couple of images from the video shoot last week, McLaren has put out this minute-and-a-half video clip showing the MP4-29H running a few laps around Silverstone, marking the official start of what could be the second reign of the McLaren-Honda dynasty. News Source: McLaren Motorsports Honda McLaren Racing Vehicles Videos F1 mclaren-honda

One man's love of vintage Honda motorcycles spawns new museum

In 1977, David Silver got a Honda SS50 moped - it was the last year of unrestricted mopeds for riders just 16 years of age in the UK. That two-wheeler made him a fan, and starting his Honda parts business in 1986 made him a part of the Honda family. He started collecting, with the idea that he'd eventually open a museum. During a visit to another amateur collector's trove in Pennsylvania, the Brit got the chance to purchase the 125 bikes the American had gathered, and his museum aspirations hit the fast-forward button. He's in the process of building a proper home for the bikes in Suffolk, it should open later this year. There will be everything from the first Cub F engine that people could attach to bicycles in 1952, to two examples of the CB92 Benly Super Sport that showed how fast and how good a 125cc bike could be, to the first Fireblade that dropped in 1992 - our CBR 900RR, to the original Honda Dream. Honda says it could be one of the finest collections outside the company's museum in Japan. You can watch Silver tell his story in the video above, and there's more on what's he'll have in an article in Honda's Dream magazine. News Source: Honda Video, Dream magazine via YouTube Honda Motorcycle Classics Videos honda cub