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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 Ridgeline sorta takes class victory on Baja race debut

The Ridgeline Baja Race Truck was unveiled at SEMA earlier this month to serve not only as Honda's new off-road racing platform, but also as a preview for the upcoming second-generation pickup. Technically, it scored a class victory on its race debut in the SCORE Baja 1000. To be fair, it was also the only vehicle in that class. Though clearly a purpose-built racer, not a modified from showroom stock truck, the Baja truck features bodywork patterned after the forthcoming production model – especially at the front end. It also uses the same block, cylinder heads, and crankshaft as the 3.5-liter V6 that powers the current Ridgeline and will power the upcoming one. In race trim, it's been twin-turbocharged up to 550 horsepower. Honda Performance Development and Proctor Racing Group entered the custom-built Ridgeline in Class 2 (for forced-induction engines up to 3.6 liters) at the Baja 1000 this past weekend. Driving duties were shared by Honda spokesman Sage Marie and experienced off-road racers Jeff Proctor and Jason LaFortune. They completed the 821-mile loop to and from Ensenada, Mexico, in 25 hours, 9 minutes, and 47 seconds. That's about ten hours behind the Ford F-150 trophy truck and the Honda CRF450X that won outright, but that's beside the point. It's impressive enough that the truck finished on its debut in such a grueling race under such punishing conditions, even if it didn't have any competition. Honda Ridgeline Baja Race Truck Conquers Baja 1000 Nov 22, 2015 - ENSENADA, Mexico - Off-road racing truck debuts with Class 2 victory - Completes desert endurance event in first attempt - Racing machine previews second-generation Honda Ridgeline Developed by Honda as a preview to the introduction of the new, second-generation Honda Ridgeline, the driving trio of Jeff Proctor, Sage Marie and Jason LaFortune piloted their Ridgeline Baja Race Truck to the Class 2 victory in this weekend's 48th running of the SCORE Baja 1000. Built jointly by Honda Performance Development, the North American motorsports arm of American Honda, and the Proctor Racing Group, the tube-frame Unlimited Class 2 off-road Ridgeline Baja Race Truck made its competition debut at the brutal Baja event, which this year consisted of an 821-mile loop that started and finished in Ensenada, Mexico.

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.