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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 Civic Type R on track to smash 'Ring record, eclipse NSX

Honda has made some serious performance machinery over the course of its history, but few products have been as hotly anticipated as the upcoming new Civic Type R. Following a deep and proud history of Type R Hondas, the latest Japanese hot hatch is continuing its long striptease at the Paris Motor Show this week. But before it does, Honda has released this video clip featuring project leader Suehiro Hasshi - and he has some bold claims to make.
For one, he says it'll be the best Type R yet - and that's quite a statement considering some of its predecessors, including the almighty NSX Type R. Hasshi-san also reiterates Honda's aim of snatching the front-drive lap record at the Nürburgring away from the likes of Renault and Seat, and reports that the Honda team is on track to chew every bit it's biting off. In short, the new Civic Type R ought to be sensational.

NSX Concept-GT is the world's hottest way to boil water

The Honda NSX Concept-GT is one sexy machine, and it looks to be a very effective tool on a race circuit. But Honda's latest web spot leads us to believe that it also can be used to make tea.
In the video, the racecar is hooked up to an apparatus that uses tubing to harness the energy from the car's 500-horsepower hybrid drive system, using it to boil water. The novel tea-making technique reminds us a bit of a couple other inventive Honda commercials, namely Hands and Cog.
Watch the NSX ad below, and be sure to turn the sound up to hear that glorious engine note.