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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:

IndyCars parade across Golden Gate Bridge for Justin Wilson [w/video]

Seeing IndyCars driving on public roads is a rare treat, especially on an iconic landmark like the Golden Gate Bridge. Unfortunately, the exciting sight came on a very somber occasion. On August 27, a parade of five racecars sped across the famous span in large part to memorialize fellow driver Justin Wilson. In an incredibly touching scene, teammate Marco Andretti led the pack, and he was behind the wheel of Wilson's number 25 Andretti Autosport Honda. "It was an honor to drive Justin's car. It was emotional for sure," Andretti said to the IndyCar Series. Behind him were Graham Rahal, Will Power, and Josef Newgarden. James Hinchcliffe was in a two-seater IndyCar to deliver the Aston Cup to the season finale at Sonoma Raceway. Two safety vehicles were also part of the procession, and they were flying Justin Wilson flags. Wilson passed away earlier this week after being struck in the head by a carbon-fiber nosecone from a crash ahead of him during the ABC Supply 500 at Pocono Raceway. Since then there has been an outpouring of support from the motorsport world for the 37-year-old racer's family. You can watch a clip of the driver's crossing the Bridge, below. News Source: NBC Bay Area, IndyCarImage Credit: Eric Risberg / AP Photo Motorsports Honda Racing Vehicles Videos IndyCar andretti autosport james hinchcliffe sonoma raceway golden gate bridge josef newgarden