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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 I Like Sports ad will have you reaching for your pom-poms

Autoblog editor Greg Migliore recently wrote a great piece looking at the burgeoning re-emergence of Honda as the performance brand. Now, the company is showing some reasons why that really might be the case, with a short ad from Japan titled I Like Sports. The commercial acts as a showcase for Honda's performance prowess on the street and around the track from the recent past, present, and the near future. The spot gives the company's models a chance to show why they are worth getting excited about. There are glimpses of vehicles like the Japan-only S660, upcoming Civic Type R, S2000, the preceding and forthcoming NSX, the MotoGP bike, and Formula 1 car. Despite being just a minute long, the ad does a great job at hinting at a brand that can appeal to people who want a little excitement during a drive.

Honda Civic coupe concept gets Type R render

In presenting the Civic coupe concept at the New York Auto Show earlier this month, Honda confirmed that the Type R will eventually be coming to North America. Honda just didn't say when, and in what form. But given the announcement's coincidence with the coupe concept's unveiling, it stands to reason the Type R could look less like the current hatchback and more like the two-door that was unveiled. And if it is, it'd probably look something like this. At least, we hope. Created by Wild-Speed.com and posted on the enthusiast forums at CivicX.com, these renderings envision what a Type R version of the Civic concept would look like – with two doors and all the go-fast bits. It may not be bright green anymore, but it sure looks mean – from the aggressive aero kit to the performance rolling stock. It's even got quad exhaust tips like the Euro-market hot hatch, but mounted in the center like the concept's. So what do you think, is this the version Honda should be sending to its American dealers? Sound off in the Comments. Related Video: