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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 profit declines on semiconductor crunch and raw material costs

TOKYO — HondaÂ’s fiscal first quarter profit fell 33% from last year as a global computer chip shortage, a pandemic-related lockdown in China and the rising costs of raw materials hurt the Japanese automaker. Tokyo-based Honda Motor Co. reported Wednesday that its profit totaled 149.2 billion yen ($1.1 billion) in the April-June quarter, down from 222.5 billion yen ($1.7 billion) a year earlier. Quarterly sales slipped 7% to 3.8 trillion yen ($28 billion). Honda kept its profit forecast for the full fiscal year through March 2023 unchanged at 710 billion yen ($5.3 billion). The semiconductor shortage has hurt all the worldÂ’s automakers, including Honda, despite strong demand, and the manufacturers have been scrambling to secure alternative suppliers. Honda, which makes the Accord sedan, Odyssey minivan and Civic compact, sold about 815,000 vehicles last quarter, down from 998,000 vehicles the same period a year earlier. Auto sales dropped in almost all regions around the world, including Japan, the U.S. and Europe. “I ask for the understanding from all those who are still waiting for their vehicles and vow that our whole company is doing its utmost to make the deliveries even a day sooner,” Chief Financial Officer Kohei Takeuchi said. Takeuchi said the semiconductor shortage curtailed motorcycle production as well as car production, adding to uncertainty about future prospects. Honda said the recent lockdown in Shanghai was among the causes of the shortage in computer chips supply but declined to give specifics. Although U.S. sales are potentially facing a dent from recession worries and other economic hardships, Takeuchi acknowledged he was more worried about the shortage problem and producing the cars customers were waiting for. Takeuchi noted that motorcycle sales for the quarter, which grew to 4.25 million motorcycles from 3.88 million a year earlier, were going strong, especially in India. The cheaper yen and cost cuts helped maintain profitability overall, he added. The yen has been at a two-decade low against the U.S. dollar. A cheap yen has historically worked as a boon for exporters like Honda by boosting the value of their overseas earnings when converted into yen. But it also increases costs for imported components and materials. JapanÂ’s top automaker Toyota Motor Corp. reported recently that its fiscal first quarter profit fell nearly 18%. Nissan Motor Co. saw its quarterly profit plunge to less than half of what it was a year earlier.

Top 10 small cars with the longest total driving range

Editor's Note: Since this article was originally posted in the spring of 2015, much has changed in the automotive landscape, especially among those shopping for small car economy. With thanks to Volkswagen for their blatant cheating – and subsequent cover-up – on diesel emissions, the largest player in the diesel passenger car segment isn't playing – they're paying; billions are going for both car buybacks and federally-imposed penalties. And for a few VW execs there exists the very real possibility of jail. With the absence of a big player and the abrupt entrance – via Chevy's new Bolt – of an affordable EV with 200+ miles of range, we've limited the diesel listings to Jaguar's new XE. And for those wanting an updated look at efficiency and range, Autoblog has it – or the EPA has it. Long before electric vehicles were part of the mainstream conversation, car lovers and skinflints alike would boast about the total range of their vehicles. There's something about getting farther down the road on one tank of gas that inflames the competitive spirit, almost as much as horsepower output or top speed. Of course, the vehicles with the very best range on today's market are almost all big trucks and SUVs; virtually all have the ability to carry massive reserves of fuel. Top up a standard Chevy Suburban and you can expect to travel almost 700 miles (you'll need to stop before the Suburban stops...), while a diesel-fed Jeep Grand Cherokee manages almost as many. But what about vehicles that are smaller? The EPA has, essentially, three classifications for 'small' vehicles: Minicompact, Subcompact and Compact. All three are measured based on interior volume, meaning that some cars with rather large exterior dimensions and engines slot in next to traditional small cars. But even though impressive GT coupes from Porsche, Bentley and Mercedes-Benz may have much larger gas tanks to feed their powerful engines, that capacity is offset by higher rates of consumption... in most cases. We used the EPA's Fuel Economy Guide for model year 2017 cars as a start, calculating the official highway miles per gallon rating with each vehicle's tank capacity. The resulting numbers aren't necessarily real world, but they do offer a spectrum for total theoretical range. The eventual top ten surprised me on a few occasions, and comprised quite a varied list of vehicles. 10.