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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 Ridgeline spy shots show more truck-like lines

Honda is preparing to roll out its all-new, second-generation Ridgeline. And while we've seen several hints at what it will look like, this is our best look yet. This prototype has dropped all the heavy body cladding and shows its overall shape. As you can see from these latest spy shots, the new Honda Ridgeline will adopt a more conventional form than the model it replaces. So while it still has a bit of a flying buttress behind the C-pillar and above the front of the pickup bed, it looks nowhere near as deep and enveloping one on the outgoing model. The bed also appears to incorporate lighting into its liner. The new Ridgeline still appears to optimize the quad-cab to short-bed ratio proportions. However it looks set to compete more actively in the resurgent midsize pickup market than its segment-defying predecessor. In that regard, Honda aims to more directly take on the likes of the Toyota Tacoma, Nissan Frontier, and Chevy Colorado and GMC Canyon. What we can't see from these spy shots are details like the lights and grille treatment. However the Baja show truck revealed at SEMA mere weeks ago provided glimpses at those elements. Combine that with the still-camouflaged prototype pictured here, and we're starting to get a pretty solid idea of what the four-door pickup will look like once it reaches production. Related Video:

Honda to reveal production Civic Type R in Geneva

Honda has been working on its new Civic Type R for some time now. We drove a prototype over a year ago, and have since seen the Japanese hot hatch as a pre-production concept twice now – once in Geneva last year, and again in Paris. But at this year's Geneva Motor Show in March, the Japanese automaker will finally present the production version. Previewed in the teaser video above, the new Civic Type R promises to be among the kings of the hot hatchdom, packing a new 2.0-liter turbocharged VTEC engine and extreme styling. Unfortunately this version won't be coming to the US, but according to recent reports, another version will. Alongside the production pocket rocket, Honda will mark the European debuts of the NSX, Jazz (known to us as the Fit) and the new HR-V subcompact crossover at the Swiss expo, where it will also showcase its new McLaren-Honda F1 racer and the FCV concept. 28.01.2015 Civic Type R and NSX Supercar Lead Host of Premieres From Honda at 2015 Geneva Motor Show - Honda to unveil flagship performance models with world premiere of production Civic Type R and European premiere of NSX - Production models of all-new Jazz and HR-V to be unveiled, as well as first showing in Europe of FCV Concept fuel cell vehicle - 2015 McLaren-Honda F1 racer showcased ahead of season opener Signalling a new era for the Honda brand in Europe, every model in the range will be new or refreshed in 2015, with many being unveiled in production guise for the first time at the Geneva Motor Show in March. Performance cars for road and track, family cars and a fuel cell concept will all feature on the Honda stand. The return of two performance legends Geneva will see the global premiere of the Honda Civic Type R production car. The 'race car for the road' will be the most extreme Type R ever built, with blistering performance and thrilling dynamics that set new standards in the segment. A world-first application of Honda's new 2.0 litre VTEC Turbo engine, aggressive function-led styling and pioneering new chassis technologies combine to deliver one of the most immersive and rewarding driving experiences available in any sector. For fans keenly anticipating the launch of Honda's latest hot hatch icon, a dedicated Type R microsite goes live on 28 January.