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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

Former NHTSA chief may lead automaker-backed Takata investigation

An automaker-led effort may see the former head of the National Highway Traffic Safety Administration take on the probe into the Takata airbag inflator disaster. A coalition of at least ten automakers is in talks with former NHTSA administrator David Kelly, with unnamed sources familiar with the discussions telling The Wall Street Journal he is "among those we are considering to coordinate" the investigation.The Detroit News, meanwhile, is reporting he could be hired "in the coming days." Takata, the Japanese seatbelt and airbag manufacturer, has been the center of a defect scandal since last year. Takata is under fire for air bag inflators that can explode, shooting out metal and plastic pieces. At least five deaths and dozens of injuries have been linked to the problem worldwide. Earlier this year, Honda Motor Co., the automaker with the biggest exposure to the defective Takata air bags, was fined $70 million in the U.S. for not reporting to regulators some 1,729 complaints that its vehicles caused deaths and injuries, and for not reporting warranty claims. It was the largest civil penalty levied against an automaker. Should he take the role, Kelly would be at the fore of an investigation being assembled by an alliance of ten automakers, which includes the Detroit Three and Honda. Toyota first suggested a joint investigation back in December, The Journal reports. Kelly's goals, meanwhile, will be many. The Detroit News reports that questions abound regarding not only the recalled airbag inflators and the conditions that cause them to fail, but the whether the replacement units will have similar problems in the future. The automaker committee is far from the only one analyzing the airbag issue. Takata has assembled its own panel, led by former Secretary of Transportation Samuel Skinner, while NHTSA's deputy administrator, David Friedman, has brought in an outside engineering firm to investigate the inflators, The Detroit News reports. Separately, on Friday Takata Corp., the Japanese seatbelt and air-bag maker at the center of a defect scandal, is expecting more red ink for the fiscal year through March. It is projecting a 31 billion yen ($264 million) loss, worse than the previous forecast for a 25 billion yen ($214 million) loss, despite higher sales expected for the fiscal year. Ten automakers have recalled about 12 million vehicles in the U.S. and about 19 million globally for problems with the air bags.

2016 Honda Civic will debut on September 16

The press days for the Frankfurt Motor Show are September 15 and 16. On that second day when all the German hubbub has died down, on other side of the Atlantic, Honda will be unveiling the US-spec production Civic in Detroit and Los Angeles. We'll only get to see the interior and exterior of the standard sedan that day; the coupe, five-door hatchback, the Si, and the Type R won't say hello until later. While there could be information on the Civic's new platform, Honda doesn't plan to offer any details on the new engines and powertrains. The sedan will come with a 1.5-liter VTEC turbocharged four-cylinder mated to either a six-speed manual or a CVT. Speedier versions like the Type R will get the 2.0-liter turbocharged four-cylinder. Honda is aiming for a fuel economy rating of at least 40 miles per gallon with the base model. As for what's coming beyond that, we have an idea of what the body will look like from the leaked patent images and the concept shown off in New York earlier this year. Spy shots have shown a new console layout within today's basic instrument panel structure, there'll be a better touchscreen and new infotainment system, driver assistance features like Honda LaneWatch and Honda Sensing, and heated rear seats, while the exterior bodywork has some Accord and Acura ILX influences and available LED headlights. Vowing not to make the mistake of the 2012 Civic, Honda says we'll get "sporty driving dynamics, more daring styling, and significantly improved fit and finish." Related Video: