2009 Honda Element Sc Sport Utility 4-door 2.4l on 2040-cars

Auto blog

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 S2000, Acura RSX recalled over brake boosters

Honda has announced a recall that affects two of our favorite, dearly departed cars from the brand's portfolio: the S2000 roadster and Acura RSX coupe. A total of 5,239 S2000 models from the 2006 and 2007 model years are affected by this problem, as are 13,113 2006 Acura RSX models.
"A production error may have allowed brake booster components to be produced outside of the original specifications, potentially causing decreased brake assistance over time, which could increase the risk of a crash," American Honda said in a press release. Thus, dealerships will inspect and, if necessary, replace the brake booster setups in these vehicles, free of charge.
No crashes or injuries have been reported in relation to this brake problem. Honda says the problem was discovered during warranty claim analysis.

Japan could consolidate to three automakers by 2020

Sergio Marchionne might see his dream of big mergers in the auto industry become a reality, and an analyst thinks Japan is a likely place for consolidation to happen. Takaki Nakanishi from Jefferies Group LLC tells Bloomberg the country's car market could combine to just three or fewer major players by 2020, from seven today. "To have one or two carmakers in a country is not only natural, but also helpful to their competitiveness," Nakanishi told Bloomberg. "Japan has just too many and the resources have been too spread out. It's a natural trend to consolidate and reduce some of the wasted resources." Nakanishi's argument echoes Marchionne's reasons to push for a merger between FCA and General Motors. Automakers spend billions on research and development, but their competitors also invest money to create the same solutions. Consolidating could conceivably put that R&D money into new avenues. "In today's global marketplace, it is increasingly difficult for automakers to compete in lower volume segments like sports cars, hydrogen fuel cells, or electrified vehicles on their own," Ed Kim, vice president of Industry Analysis at AutoPacific, told Autoblog. Even without mergers, these are the areas where Japanese automakers already have partners for development. Kim cited examples like Toyota and Subaru's work on the BRZ and FR-S and its collaboration with BMW on a forthcoming sports car. Honda and GM have also reportedly deepened their cooperation on green car tech. After Toyota's recent buyout of previous partner Daihatsu, Nakanishi agrees with rumors that the automotive giant could next pursue Suzuki. He sees them like a courting couple. "For Suzuki, it's like they're just starting to exchange diaries and have yet to hold hands. When Toyota's starts to hold 5 percent of Suzuki's shares, this will be like finally touching fingertips," Nakanishi told Bloomberg. "I absolutely do believe that we are not finished seeing consolidation in Japan," Kim told Autoblog. Rising development costs to meet tougher emissions regulations make it hard for minor players in the market to remain competitive. "The smaller automakers like Suzuki, Mazda, and Mitsubishi are challenged to make it on their own in the global marketplace. Consolidation for them may be inevitable." Related Video: