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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

Surprise! McLaren and Honda finally call it quits

It's been coming for a long while, so it should surprise no one to learn that McLaren and Honda have finally called it quits. Sources confirmed to Motorsport.com and Sky Sports that the two companies have finally settled on a deal that will end a partnership that has been nothing but heartache and tears. McLaren has reportedly inked a three-year deal to use Renault engines, ending in 2020 along with the current engine regulations. This also means McLaren driver Fernando Alonso is likely to extend his contract beyond the end of this season. When Honda first announced it was returning to F1 with McLaren, fans had visions of Fernando Alonso and Jenson Button reliving the glory days of Ayrton Senna and Alain Prost in the late 1980s. The truth couldn't be further removed. At points, McLaren has struggled to make it the full race distance, much less win races and fight for championships. Frankly, it's been embarrassing for both Honda and McLaren. No one comes out a winner here. Honda has sullied any reputation it had in F1, while Alonso's talent and McLaren's engineering expertise were both wasted the past few seasons. According to Motorsport.com, McLaren will get the same engine parity as the factory Renault Sport team as well as Red Bull Racing. Assuming that McLaren can provide a competitive chassis, that should vault it at least into the middle of the pack. Team principal Zak Brown hasn't been quiet about his frustrations. After both McLaren drivers failed to finish in Italy, Brown told Sky Sports, "We need to get more competitive. This weekend showed we're not making any significant progress." Meanwhile, Toro Rosso will switch from Renault to Honda power, with Toro Rosso driver Carlos Sainz Jr. making the move to Renault. What that means for Red Bull's junior team is unclear. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

Honda asked for Takata inflator change without telling Feds

Honda and Takata could be in legal hot water after the automaker requested a design change to the supplier's airbag inflators in 2009 without notifying the government. According to internal documents obtained by Reuters, the updated parts had extra vents to reduce the force directed occupants if a rupture occurs. Automakers generally need to tell the National Highway Traffic Safety Administration about any safety-related changes to their vehicles, but Honda argues to Reuters that the disclosure wasn't necessary in this case. The company wanted the changes to the parts to "protect against the possibility of future manufacturing errors – it was not an acknowledgement of a larger design flaw in the inflators," Honda spokesperson Chris Martin told Reuters. The revised components started going into some Honda models in 2011. However, a jury might not agree with Honda's position, and a lawyer could argue the company had a responsibility to report the alterations. There's already a pending class action lawsuit against automakers and Takata for violations of the Racketeer Influenced and Corrupt Organizations (RICO) Act, and there are many more from individuals. Among those is the case of a pregnant woman in Malaysia who died from a rupturing airbag. An investigation by the Independent Testing Coalition found three factors for the inflators'' rupturing. The use of ammonium nitrate is part of the problem, but the inflator's assembly doesn't keep moisture from reaching the chemical. If a vehicle is in a high humidity area, the danger is even worse. When they combine, these issues make the explosions more likely. Takata allegedly knew about the problem as far back as 2000 but hid the failures. Emails even reportedly showed workers joking about changing the data. Related Video: