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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 returning to F1 as McLaren partner

Honda must really love Formula One racing, as evidenced by today's announcement that the Japanese automaker is returning to the world's most popular motorsport for the fifth time in its history. Honda has entered into a team partnership with McLaren to develop and manufacture power systems - the engine and energy recovery system - for the 2015 F1 season. McLaren will be in charge of chassis development and running the day-to-day operations of this newly formed team, which will be called McLaren Honda.
Honda says its decision to reenter F1 racing had to do with new regulations for the 2014 season that require cars to be powered by a 1.6-liter direct-injection turbocharged V6 engine paired with an energy recovery system. Apparently the chance to develop this particular powertrain for F1 racing was too enticing for Honda to pass up, which suggests it has bigger plans for the knowledge learned while developing these systems beyond just winning races.
As mentioned, this is Honda's fifth foray into F1 racing, the first being back in 1964 when it participated as its own team through 1968. Its longest stint came from 1983-1992 as an engine supplier, during which time it partnered with many teams, including McLaren, and won six Constructor Championships. Honda then returned from 2000-2005 as an engine supplier for British American Racing (BAR) before buying that team outright and running it as Honda Racing from 2006-2008. Then the global economic crisis hit. Honda's return to the sport will surely be welcomed by fans as its partnership with McLaren should produce a formidable team. It's a strong signal that the company has returned to health after a few tumultuous years, and hopefully its rediscovered motorsports mojo will help yield more passionately engineered street cars.

F1 champ Fernando Alonso geared up for rookie run at Indy

NEW YORK - Twice Formula One world champion Fernando Alonso surprised himself with his qualifying success for Sunday's Indianapolis 500, but the Spaniard knows his biggest challenge will come on race day. Alonso, racing on an oval for the first time, averaged more than 230 miles per hour (370 kph) to qualify fifth fastest for a place in the second row in the 33-car field at Indianapolis Motor Speedway. "I was a bit surprised," Alonso, 35, told Reuters on Tuesday. "When we announced to come here one month ago, we did it without knowing how competitive we could be, if I was able to adapt to oval racing, to these cars." "I still lack experience in important moments of the race. I will try to compensate with the speed, with motivation and we will see what happens." A lack of experience may cost him on the biggest day of US racing when a champion will be crowned after 200 laps of the massive 2.5-mile oval, but Alonso is geared up for the chance. "You respect the place, respect the speed. You respect your colleagues out there, but at the end of the day, when you are in your car and close the visor, you would like to have one mile per hour more. It's never enough," he said. While Alonso passed the entrance exam with flying colors in qualifying, he knows the hardest test is to come. "The biggest challenge I will face is in the race when you are running in traffic, those groups of cars that form in the race. It changes completely the behavior of the car. "You feel the car very loose... we've been practicing that with the team, trying to create our own groups because we are six cars," Alonso said. "I still lack experience in important moments of the race. I will try to compensate with the speed, with motivation and we will see what happens." GUESSING GAMES Alonso said timing his moves may be a guessing game. "Taking the opportunity to overtake and to pass will be a difficult decision to make," he said. "There are many factors you need to address while you are driving 230 miles per hour. "You have to stay calm, be ready for the last one-third of the race. That is where it comes." Alonso said the race demands a balance between pushing the limit and not crossing the line into recklessness. "With no experience, for me you're not sure sometimes where you are with that line - if you are over the limits of the car, or over the limits of running with the traffic.