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GM patent reveals new two-stage turbocharger

Modern turbochargers may be some of the best ever made, but performance is something that engineers are always trying to improve. According to GM Inside News, General Motors (GM) is hoping to alleviate some of the negative aspects of a two-stage turbocharger setup with a newly-patented design. The patent, that was filed on May 19, 2016, reveals a clever bypass system that allows the engine, a four-cylinder unit, to optimize both the low-pressure and high-pressure inlets for its respective functions. According to the filing, a conventional two-stage turbocharger setup is engineered to allow both turbines to operate simultaneously at low and mid engine speeds. At high engine speeds, only the low-pressure turbine works. The setup can't isolate either the low or high pressure side, which can impair low-end performance. GM's new two-stage turbocharger setup looks to eliminate this by linking the high-pressure turbo to the exhaust manifold through the high-pressure inlet duct. The low-pressure turbo is attached to the high-pressure turbo by a low-pressure inlet duct, which is linked to a connecting channel. A single actuator that is housed in the exhaust manifold creates a bypass that can opens the high-pressure inlet or close the connecting channel. Depending on what the engine load and speed is, the ECU guides the actuator—a single rotating spindle with discs corresponding to flanges on the high and low pressure sides—to isolate one of the two turbos. Isolating the turbos allow the respective inlets to be engineered for the best possible fluid dynamic performance. The setup should increase performance and decrease lag. There's no word on what car this setup will make an appearance on, but it will most likely be used in premium vehicles before trickling down to the rest of GM's vehicles. Related Video: News Source: GM Inside News, AutoGuide via GM Authority Cadillac Chevrolet GM Technology Sedan turbo patent engine turbocharging

These are 2014's best-selling cars and trucks

Now that 2014 is no more than a set of numbers on spreadsheets, at last, the grist mill gets its first real load to chew on. The number one selling vehicle in America last year was the Ford F-Series, a fact that should surprise you only if your family name is Van Winkle and your naps tend to last 38 years, which is how long the Ford pickup has ruled our buying landscape. Even though series sales were down 1.3 percent, it still racked up 753,851 units. That's 2,065.3 sales per day, every day, all year. The Chevrolet Silverado, up 10.3 percent for the year, was still a daylight second at 529,755 units. The cab-and-bed love continued into third place with the Ram 1500-3500 trucks, gaining 23.6-percent year-on-year to clock 439,789 units. The robust turnout at The Bighorn and Jeep helped Fiat-Chrysler increase its sales by 16 percent, past the two-million mark. Our number one car? The Toyota Camry, staying in first place with a 4.9-percent sales boost to 428,606 sales, trailed again by the Honda Accord at number five with 388,374 sales. Accord sales rose six percent, and if it's any consolation to Honda for coming in second - not that it needs one - it is the only manufacturer to have three vehicles in the top ten. The rest of the list: the Nissan Altima with 335,644 sales (+4.7%), the Honda CR-V with 355,019 (+10.2%), the Toyota Corolla/Matrix combo with 339,498 (+5.9%), the Honda Civic with 325,981 (-3.1%), and the Ford Fusion with 306,860 sales (+2.9%). Total sales for the year were up six percent to 16.5 million vehicles, a volume not seen since 2006, aided by a strong December that was up by 11 percent year-on-year. Ford was the top selling brand overall but sales didn't really budge from 2013, while Subaru rocketed up 21 percent to finish with 513,693 sales. At the precious end, BMW, Audi, Porsche and Land Rover all had record years, and Kelley Blue Book thinks we could be looking at 17 million sales for the next two or three years. Looks like it's time to start making hay again... Featured Gallery Best-selling vehicles of 2014 View 10 Photos News Source: Detroit News, Associated Press Auto News Chevrolet Ford Honda Nissan RAM Toyota Car Buying Truck Sedan sales

Ford Police Interceptors dominate Michigan State Police testing

Once again, Ford Motor Company builds the fastest police vehicles. The Blue Oval touted the news in an official release following Michigan State Police and Los Angeles County Sheriff's Department testing. Ford did very well. Except for one acceleration metric – zero to 10 miles per hour – the Blue Oval's Taurus and Explorer-based cop cars were the quickest, with particular praise coming for the EcoBoost-powered models, which bested Chevrolet and Dodge's V8-powered variants. Dearborn's products also posted the fastest average times around MSP's vehicle dynamics course. But it wasn't all positive for Ford. The only four-cylinder in the contest, the 2.0-liter, EcoBoost Ford SSP Sedan, had both the lowest top speed, 120 mph, and the slowest acceleration figures. It was also the slowest in track testing. Ford's products also failed to match the braking and top speeds of its rivals from Detroit and Auburn Hills – the rear-drive Charger Pursuit posted the best braking stats of the entire test, while the V8-powered Chevrolet Caprice hit the highest top speed, at 155 mph. Ford did score a top speed award, among SUVs, but at 132 mph, the naturally aspirated Police Interceptor Utility had to share its award with the equally fast, rear-drive Chevrolet Tahoe. The LA County Sheriff's timing isn't publicly available, but according to Ford, the EcoBoost-powered police cars put on a similarly impressive show for cops on the West Coast. We've assembled a spreadsheet on Google Docs that offers an easy to browse comparison of the different stats assembled by the Michigan State Police, and divided the vehicles between standard V6-powered sedans, high-performance sedans (EcoBoost and V8 models), and SUVs. You can check it out here. Related Video: