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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

NACTOY announces top nine finalists for Car, Truck and Utility of the Year

Finalists for the 2024 North American Car, Truck and Utility Vehicle of the Year (NACTOY) Awards were announced at this year’s L.A. Auto Show. This whittles the field down to nine vehicles in total, with the winners scheduled to be announced on January 4, 2024. The finalists in their respective categories: Car category: Honda Accord, Hyundai Ioniq 6, Toyota Prius Truck category: Chevrolet Colorado, Chevrolet Silverado EV, Ford Super Duty Utility category: Genesis Electrified GV70, Kia EV9, Volvo EX30 These nine cars were chosen from a list of 25, which was previously narrowed down from a list of 52 eligible vehicles. Notable misses include the Chevrolet Corvette E-Ray, Toyota GR Corolla, GMC Canyon, Ford Ranger, Chevrolet Blazer EV, Chevrolet Equinox EV, Mazda CX-90 and Toyota Grand Highlander, among others. Jurors will now evaluate the final nine through the end of the year to determine the four winners. Autoblog Editor-in-Chief Greg Migliore is among the jurors. Green LA Auto Show Chevrolet Ford Genesis GM Honda Hyundai Kia Toyota Volvo Truck Crossover Hatchback SUV Electric Hybrid Luxury Off-Road Vehicles Performance Sedan

Honda ending CR-Z, Insight sales in Europe

Death by diesel? That may be the epitaph of the Honda Insight and CR-Z in Europe, where the Japanese automaker will discontinue sales of the two hybrid models before to the 2015 model-year. A Honda spokesman confirmed the discontinuation to Automotive News, and information on those models has been taken off of Honda's official websites in Germany, Spain and Italy. The European embrace of all things diesel and fuel efficient as well as competition from Toyota are the primary culprits. The cancellation is not a surprise. Insight sales in Europe fell a whopping 62 percent last year while CR-Z sales there plunged 66 percent. Combined, both models sold less than 2,000 units in Europe last year, Automotive News says, citing JATO Dynamics. Honda is having trouble moving the Jazz Hybrid (also known as the Fit) in Europe as well. European sales declined about 40 percent last year to around 4,500 units. Those numbers compare rather unfavorably to a 43 percent surge in Toyota's hybrid sales in Europe to about 153,000 units. The Insight may face the same fate in the US. Last year, US Insight sales fell 18 percent to 4,802 units, a small, small challenge to the more than 234,000 Toyota Prius variants sold in the US in 2013. Honda has not made an official statement on the Insight's fate here, but the sales are speaking for themselves. Featured Gallery 2014 Honda CR-Z Hybrid View 14 Photos News Source: Automotive News - sub. req. Green Honda Hybrid hybrid sales