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Honda Jazz Prototype is brand's latest production-ready 'concept'

Another auto show, another Honda "prototype." The brand has made something of a habit of showing very thinly veiled production models at the world's auto shows, ranging from the Accord, to the Civic and Civic Type-R, as well as the CR-V. And yes, this is far from the first time we've railed against this particular trend (it's not even the first time at this auto show). Now, it's time to preview the production-ready Jazz, known to American consumers as the recently released Fit.
As we covered in our original post on the Jazz Prototype, this car is pretty much a twin to the Fit, aside from its 1.3-liter engine. Sitting in place of the US-market 1.5-liter four-cylinder, the Earth Dreams 1.3 is probably a bit more suited to the tighter urban environments of the European Union. While the engine might be different, the six-speed manual and continuously variable transmission will be plenty familiar to US consumers.
We have a full live gallery of the new Jazz Prototype at the top of the page. Take a look at that, and then scroll down for Honda's press release and official images.

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 poised to get new Earth Dreams engines

When Honda executed its emergency refresh of the Civic for 2013, it didn't do any massive powertrain reworking. But that doesn't mean new things aren't already in the works for Honda's compact. According to Automotive News, Honda has confirmed that it will offer the Civic with a new Earth Dreams powerplant sometime in the future, though details on timing and exactly what sort of engine are unclear as of this writing.
The confirmation comes from Honda's executive vice president and regional director for North America, Tetsuo Iwamura, who says that the Earth Dreams engine will come when the Civic is re-engineered or redesigned, not during a refresh. There is also no mention of whether these changes will apply to just the standard Civic, or if the Si and Hybrid models will receive some Dreamy new tech, as well.
The entire Earth Dreams group of technologies encompasses more than just naturally aspirated engines with direct injection. A turbo-diesel engine is also part of this suite, as are new continuously variable transmissions and new gasoline-electric hybrid powerplants. Honda launched its 2.4-liter and 3.5-liter Earth Dreams engines in the redesigned 2013 Accord.