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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

Honda's new hybrid will cut use of rare-earth metals

Honda will start selling a hybrid vehicle later this year that will reduce the use of rare-earth metals in the hybrid-electric motor's magnets. The Japanese automaker worked with Japanese metal supplier Daido Steel Co. to develop a process that eliminates the use of rare-earth elements such as terbium or dysprosium. The first vehicle to feature this process will be the Honda Freed subcompact minivan, which is based on the platform of the Fit and will go on sale in Japan later this year. The new technology will help free Honda from its dependence on China, which produces about 90 percent of the world's rare-earth metals. The new process uses what's called the "hot deformation method" to eliminate the need for the heavier metals and likely reduce hybrid-engine costs. Honda's new hybrid motors use a lighter rare-earth material called neodymium. With both electric and hybrid vehicle production forecast to grow within the next few years, rare-earth metal demand is forecast to rise by 14 percent a year to more than $9 billion by 2019, Automotive News says, citing an estimate from technology-research company Technavio Research. Honda estimates that the new process cuts the cost of making the motors' magnets by about 10 percent while reducing their weight by about eight percent, Reuters says. Additionally, neodymium is found in Australia and North America, as well as China. Honda has been selling a gas-powered version of the Freed in Japan since 2008. Three years later, Honda started selling a hybrid version of the minivan, which was rated to get 51 miles per gallon on the Japanese driving cycle. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. Daido Steel and Honda Adopt World's First Hybrid Vehicle Motor Magnet Free of Heavy Rare Earth Elements – Honda Freed, on sale this fall, will be the first hybrid vehicle to adopt new magnet – Daido Steel Honda TOKYO, Japan, July 12, 2016 - Daido Steel Co., Ltd. and Honda Motor Co., Ltd. became the world's first companies to achieve practical application of a hot deformed neodymium magnet containing no heavy rare earth*1 and yet with high heat resistance properties and high magnetic performance required for the use in the driving motor of a hybrid vehicle. This heavy rare earth-free hot deformed neodymium magnet will be applied first to the all-new Honda FREED, scheduled to go on sale this fall.

Ever wonder how to really pronounce Japanese automaker names?

People tend to get very set in their ways when it comes to the pronunciation of words. Just look at the endless debates over whether or not to say the final 'e' in Porsche (which you should in terms of correct German enunciation). Or the argument about whether to follow the British convention and give the 'u' in Jaguar a special delivery or to say the 'ua' diphthong as more of a 'w' sound, as usually happens in the US.
This short video doesn't answer either of those automotive questions, but it does allow a native Japanese speaker to demonstrate the accepted pronunciations for several, major automakers from the country. One benefit is that it clears up the occasional debate over whether Nissan should be said with a long or short 'i' sound. Also, listen closely to how the female host says Mazda as Matsuda, the way it's actually said in the language. Even if this doesn't change the way you enunciate these brands, at least now you know the accurate way in Japanese.