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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

Ford tumbles to second worst in Consumer Reports reliability survey, list dominated by Japanese [w/video]

It's no secret that MyFord Touch has had its share of problems since being introduced, but the most recent reliability survey from Consumer Reports shows just how much this infotainment system has affected Ford. Just two years ago, the automaker was in the top 10 for the institute's reliability rankings, but since then, it has tumbled to the second-lowest rung just above dead-last Jaguar. In addition to MyFord Touch, CR also attributes a handful of new products that have had issues right out of the gate.
Compiled from 1.2 million subscriber surveys, this year's auto reliability survey heavily favors Japanese automakers, with eight of the 10 spots hailing from Japan. Toyota brands grabbed the top three spots (Scion, Toyota and Lexus - in that order) with Mazda, Subaru, Honda and Acura filling the next four spots. The only non-Asian automaker cracking the top 10 was Audi at number eight.
Audi climbed a total of 18 spots from last year, and Cadillac and GMC round out this year's top gainers breaking into the top 15. Helping Cadillac's upward movement, the CTS Coupe was named the most reliable domestic car. Lincoln, Volvo and Chrysler join Ford on this year's biggest loser list.

Texas teen is 10th Takata airbag victim

A 17-year-old high school senior from Richmond, Texas, died in a 2002 Honda Civic on March 31 after the Takata-supplied airbag inflator ruptured. This is the 10th fatality linked to the faulty parts in the US. Honda and US regulators confirmed that the airbag exploded, according to Reuters. The fatal incident occurred when the Civic's driver rear-ended a Honda CR-V. The teen was wearing a seatbelt and wasn't speeding. "Everybody should have walked away from this," Fort Bend County Sheriff's Deputy Danny Beckwith told Reuters. However, a piece of shrapnel from the inflator cut the driver's carotid artery, and the person died. With this latest fatality, there have been 10 deaths and over 100 injuries in the US from exploding airbag inflators. Nine of the deaths have happened in Honda vehicles. The other was in a Ford Ranger pickup. Investigators at the Independent Testing Coalition placed the cause of the explosions on a combination of the inflator's chemical, design, and the weather. The ammonium nitrate propellant can explode with additional force when exposed to moisture, like in high humidity areas. The part's construction is also part of the problem because it allows this humidity to access the chemical. Takata has recalled roughly 24 million airbags in 19 million vehicles in the US. The latest tally from the National Highway Traffic Safety Administration showed that as of March 11, 2016, about 7.5 million inflators have been replaced. All the parts with ammonium nitrate inflators may need replacing someday, which could affect 100 million vehicles. Related Video: Statement from Honda Concerning Confirmed Texas Rupture Statement from American Honda Motor Co., Inc. Re: Confirmed Rupture of Takata Airbag Inflator in Fort Bend County, Texas Statement date: April 6, 2016 During an inspection today, accompanied by representatives of the National Highway Traffic Safety Administration (NHTSA), the Sherriff's Department of Fort Bend County, Texas, and Takata, American Honda confirmed that the Takata driver's airbag inflator ruptured in the crash of a 2002 Honda Civic on March 31, 2016, in Fort Bend County, Texas, resulting in the tragic death of the driver. Our thoughts and deepest sympathies are with the family of the driver during this difficult time. Honda has shared all available vehicle history information collected to date with NHTSA and will continue to cooperate with NHTSA throughout the process of investigating this crash.