1991 Honda Prelude 2.0l Si, Manual, Red, 208k Miles (b20a5 Engine) on 2040-cars

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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 S660 Kei car makes you want to jump in and drive

We want the Honda S660. In fact, after seeing the freshly debuted production model, it's fair to say the kei roadster has already leapt to the very tip-top of our forbidden fruit list. Considering our newfound love for the tiny two-seater, you, dear reader, are going to have to put up with a lot of S660 content in the coming weeks. First up, we have what's called nori-setsu, or "riding instructions." Honda recruited a pair of gymnasts, who use their talents to slide, creatively, into a mockup of the S660. While the acrobats make it look easy, we imagine the amount of space in the S660 makes slotting into the driver's seat off a pommel horse is somewhat dangerous, hence the padding and mocked-up roadster. Fortunately, when an actual S660 is brought out to play, the gymnast finds a more conventional means of getting behind the wheel. Check out the video.

Honda recalls 25k Fits over grab handle, airbag issue

Honda has issued another recall for the Fit. Only this time, it comes down to a very specific issue arising in a limited cross-section of production. The recall affects over 25,000 units in the United States alone. This problem results from the bracket affixing the rear grab handle, which was apparently manufactured incorrectly. As a result, the bracket may puncture the side curtain airbag as it deploys. That's bad news, so Honda is recalling the affected vehicles to have that bracket replaced. According to the manufacturer, the issue was discovered during its own internal testing procedures, and not because of any reported incidents. The problem only affects Fit hatchbacks from the 2015 and 2016 model years, manufactured between April 11, 2014, and July 2, 2015. Even within those confines, however, the recall is limited only to those in LX trim level and not equipped with a sunroof. That amounts to an estimated 25,367 units in the US - less than a third of the 84,000+ units American Honda sold in the same fifteen-month period. This is the third recall that has affected the Fit in as many months. Last month saw 143,000 units of the Fit and Civic recalled over a transmission issue. In September, the Japanese automaker called in another 18k Fits over a problem with their ignition coils. RECALL Subject : Improper Rear Grab Rail Bracket/FMVSS 214/226 Report Receipt Date: OCT 23, 2015 NHTSA Campaign Number: 15V697000 Component(s): AIR BAGS , STRUCTURE Potential Number of Units Affected: 25,367 Manufacturer: Honda (American Honda Motor Co.) SUMMARY: Honda (American Honda Motor Co.) is recalling certain model year 2015-2016 Fit LX-trim vehicles manufactured April 11, 2014, to July 02, 2015 and not equipped with a sunroof. In the affected vehicles, the rear grab handle brackets were not manufactured properly, and as a result, the brackets may puncture the side curtain air bags upon their deployment. As such, these vehicles fail to comply with Federal Motor Vehicle Safety Standard (FMVSS) number 214, "Side Impact Protection" and number 226, "Ejection Mitigation". CONSEQUENCE: If the side curtain air bags are punctured upon deployment, the outboard seat occupants may be at a higher risk of injury during a crash. REMEDY: Honda will notify owners, and dealers will replace the rear grab handle bracket, free of charge. The recall is expected to begin December 4, 2015. Owners may contact Honda customer service at 1-888-234-2138. Honda's number for this recall is JV8.