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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 Goldwing airbag recall spreads Takata mess to motorcycles

Recall, after recall, after recall, one thing has remained constant in the Takata airbag quagmire: The disaster has been confined to the four-wheeled realm. Not any longer. The Honda Goldwing, the first and so far the only motorcycle equipped with an airbag from the factory, has been recalled. A total of 2,701 motorcycles are involved in this recall, spanning the 2006 through 2010 model years, and only in certain regions. It's sort of confusing, so we suggest perusing the official notice below for all the details. But the gist is the same as ever – Takata's airbag inflators can rupture, potentially propelling shards of metal shrapnel at the vehicle's occupants. Or in this case, the motorcycle riders. Only Goldwings sold or operated in areas with high humidity or frequent temperature cycling are being recalled at this time. No schedule for repairs and replacements has yet been announced, but owners are invited to call Honda at 1-866-784-1870 for more information. As always, you can check the recall status of your vehicle with NHTSA's lookup tool using your car or bike's VIN. Related Video: RECALL Subject : Air Bag Inflator May Rupture , 1 INVESTIGATION(S) Report Receipt Date: MAY 24, 2016 NHTSA Campaign Number: 16V347000 Component(s): AIR BAGS Potential Number of Units Affected: 2,701 Manufacturer: Honda (American Honda Motor Co.) SUMMARY: Honda (American Honda Motor, Inc.) is recalling certain model year 2006-2010 Honda GL1800 (Gold Wing) motorcycles manufactured February 8, 2006, to May 14, 2009 originally sold, or ever registered, in Alabama, California, Florida, Georgia, Hawaii, Louisiana, Mississippi, South Carolina, Texas, Puerto Rico, American Samoa, Guam, the Northern Mariana Islands (Saipan), and the U.S. Virgin Islands, or "Zone A." Additionally, unless included in "Zone A" above, Honda is recalling certain model year 2006-2008 Honda GL 1800 (Gold Wing) motorcycles manufactured May 10, 2007, to May 14, 2009 originally sold, or ever registered, in Arizona, Arkansas, Delaware, District of Columbia, Illinois, Indiana, Kansas, Kentucky, Maryland, Missouri, Nebraska, Nevada, New Jersey, New Mexico, North Carolina, Ohio, Oklahoma, Pennsylvania, Tennessee, Virginia, and West Virginia, or "Zone B." Motorcycles not originally sold or ever registered in either Zones A or B are not subject to this safety recall.

New Honda ads: Fix your airbags

As we've heard on many different occasions, one of the biggest problem with recalls is getting people to actually report to the dealership to have repairs done. This is particularly important in cases where the recalled part can cause some very serious harm. To combat this tendency – you might even call it neglectfulness – on the part of owners, Honda is turning to advertising. The company is launching a multi-million-dollar ad campaign targeting owners of vehicles affected by the Takata airbag recall and asking them to report in to have a replacement inflator installed. "Honda hopes that this new consumer information campaign will bolster our existing and continuing efforts to reach our customers and maximize the vehicle repair completion rates associated with recalls to replace Takata airbag inflators," Honda's John Mendel said in the attached statement. "These ads are a strong call to action from our company designed to break through the clutter, grab the attention of customers driving affected vehicles, and urge that they get required repairs as soon as possible." The campaign will kick off March 16 with full-page color ads in over 120 newspapers and 30-second radio spots in 110 markets. Because it's 2015, the company will also use sponsored Facebook posts "that mention the specific vehicle owned by each identified user." Yep, here's the future. Honda's ads will largely be focused in the 11 high-humidity states and territories (Alabama, California, Florida, Georgia, Hawaii, Louisiana, Mississippi, South Carolina, Texas, Puerto Rico and the US Virgin Islands) most affected by the Takata recall. Several of the states were part of the initial National Highway Traffic Safety Administration investigation, like Florida, Hawaii, the USVI and Puerto Rico. "The goals of this campaign is to save lives and prevent injuries," Mendel added. This campaign will be worth watching, not only because they deliver an important message, but they could set a precedent for the handling of future major recalls. Check out Honda's full press release, available below. New Honda Advertising Campaign Urges Owners to Take Immediate Action to Check for Open Recalls to Replace Takata Airbag Inflators Mar 12, 2015 - TORRANCE, CA.