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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

Half of Chinese car buyers won't shop Japanese over hard feelings

The hard feelings between China and Japan is no real secret. Besides modern-day disputes, the two countries have had a long-running enmity that dates back to well before the atrocities of World War II. All things considered, then, it shouldn't be a shock that half of Chinese car buyers wouldn't consider a Japanese car. This survey, conducted by Bernstein Research, found that 51 percent of 40,000 Chinese consumers wouldn't even consider a Japanese car – which, again, isn't really surprising, when you consider stories like this. According to Bernstein, the most troubling thing is the location of these sentiments – smaller, growing cities where the population is going to need sets of wheels. We imagine it wouldn't be as big of an issue in traffic-clogged Shanghai or Beijing, but these small cities are going to become a major focus for automakers. "Nationalistic feelings are an impediment. [Japanese] premium brands will struggle," analyst Max Warburton wrote in a research note, according to The Wall Street Journal. Things will improve for Japanese makes, although China will remain a challenge, with Warburton writing, "the one thing that comes out most clearly is that most Chinese really want a German car. While we expect Japanese brands to continue to recover market share this year, ultimately the market will belong to the Germans." There are a few other insights from the study. According to WSJ, Japanese brands are viewed better than Korean brands, and they're seen as more comfortable than the offerings from Germany or the US, despite the fact that everyone in China apparently wants a German car. This is a tough position for the Japanese makes to be in, as there's really not a lot they can do to win favor with Chinese buyers. It will be interesting to see how this plays out, particularly as the importance of the PRC continues to increase year after year. News Source: The Wall Street Journal - sub. req.Image Credit: Kazuhiro Nogi / AFP / Getty Images Honda Mazda Nissan Toyota Car Buying

2019 Volkswagen Jetta GLI vs. sport compact sedans: How they compare on paper

Hot hatchbacks may be stealing the headlines, but they're not the only way to get cheap speed. There are actually a number of small sporty sedans on the market, too, in case you want that more formal roofline. The recently revealed 2019 Volkswagen Jetta GLI highlighted these vehicles, so we figured we'd take a look at the specifications and see how they compare to each other. Our contenders are the aforementioned VW, along with the 2019 Honda Civic Si, 2019 Subaru WRX and 2019 Hyundai Elantra Sport. All four start under $30,000 and offer more than 200 horsepower. And of course, they all have trunks. In our comparison, we'll look at each car's powertrain comparing horsepower and torque. We'll also look at practicalities such as interior space, fuel economy and pricing. You can see the raw numbers in the chart below, followed by additional analysis and links to reviews. If you'd like to compare any of these cars with a different group, be sure to check out our car comparison tool. Engines and drivetrains Performance, and particularly power, is likely a priority for a sporty sedan buyer, and there's a clear leader: the Subaru WRX. At 268 horsepower, it's 40 ponies ahead of the next most potent car, the 228-horsepower Jetta GLI. It also ties the GLI for torque at 258 pound-feet. Both cars also support the old adage that "there's no replacement for displacement," since each have 2.0-liter engines while the Hyundai has a 1.6-liter unit and the Honda engine only displaces 1.5 liters. The Hyundai and Honda are nearly tied for power and torque, too, at roughly 200 horsepower and 195 pound-feet of torque. Another bonus for the Subaru is its standard all-wheel-drive system, which is handy for power delivery, lateral grip and for inclement weather. While the Jetta GLI and Civic Si are front-drive only, they do feature mechanical limited-slip differentials to enhance traction under power. The Elantra Sport makes do with electronic aids and an open differential. We're pleased that all four of these cars offer manual transmissions, too. But if you do want or need an automatic transmission, the VW, Subaru and Hyundai have you covered. The VW and Hyundai rely on seven-speed dual-clutch transmissions, and the Subaru uses a CVT with eight preset ratios for manual mode shifting. The Civic Si, though, is manual only (and it's an excellent manual at that).