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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

Automakers donating money, vehicles and supplies to Oklahoma tornado relief effort

Judging by the destruction the Oklahoma City area experienced earlier this week, residents are going to need a lot of help in coming months. Fortunately, a number of automakers - including General Motors, Ford, Chrysler, Volkswagen, Honda and Toyota - have stepped up to donate money, supplies and vehicles to aid in the recovery and rebuilding processes.
Here's a quick rundown of which automakers have pitched in and what each contributed so far:
Ford Motor Company has donating $250,000 and a Transit Connect to the American Red Cross, and it will match all other donations made to the Red Cross (up to $250,000) using a special URL tied to the latter's website (link here). Additionally, its local Oklahoma dealers have thrown in an extra $150,000 for the United Way and the automaker will be offering an extra $500 toward the purchase of a new Ford vehicle.

Honda Expands Takata Airbag Recall To 5.4M Units In The US

While Honda already announced plans to take its front driver's side Takata airbag inflator recall nationwide, the automaker has now officially reported on the number of affected vehicles and the specific models in need of repair. The expanded campaign covers an estimated 5.4 million units across the US, including those already being fixed under the previous regional actions. That number is an expansion of the five million units initially reported by NHTSA. The affected models under the nationwide recall are the 2001-2007 Accord with a four-cylinder engine, 2001-2002 Accord V6, 2001-2005 Civic, 2002-2006 CR-V, 2003-2011 Element, 2002-2004 Odyssey, 2003-2007 Pilot, 2006 Ridegline, 2003-2006 Acura MDX, 2002-2003 TL and 2002 CL. For customers who expressed concern about their vehicle's safety, Honda had already been replacing the inflators nationwide. It's possible for the inflators in these vehicles to rupture when inflating the airbag, spraying metal fragments at occupants. This problem has been blamed for at least five deaths worldwide and at least 139 reported injuries. In its statement, Honda said that it worked with Takata to test the recalled inflators in the original high-humidity recall regions, and there were no abnormal deployments in these evaluations. Honda will begin notifying owners by "over time," according to its statement. Priority will be put on the geographic areas with the highest risk of ruptures. Those in the original recall region were contacted in September. Earlier in December, Honda partnered with Autoliv to supply the automaker with replacement inflators for this campaign. Autoliv predicted it would take six months for deliveries to start. Takata also increased its production of substitute components. Scroll down to read the company's announcement of this nationwide expansion. Statement by American Honda Regarding National Safety Improvement Campaign: Driver's Front Airbag Inflator Supplied by Takata Dec 8, 2014 - TORRANCE, Calif. Honda will voluntarily expand a regional Safety Improvement Campaign initiated in June 2014 (NHTSA No. 14V-351) into a national Safety Improvement Campaign affecting certain 2001 through 2011 Honda and Acura vehicles in the United States to replace the driver frontal airbag inflator, free of charge. Honda is expanding this Safety Improvement Campaign to address concerns raised by its customers whose vehicles were not included in the regional campaign.