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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

This 93-car Iowa auction is like a Big 3 classic muscle museum

Bill "Coyote" Johnson has been buying cars since high school and has amassed a collection totaling 113 vehicles, according to NBC 6 News. But time has changed his motivations and priorities, and he's decided to auction 93 of those cars, many of which are classic muscle from Ford, Chevrolet, Dodge, Plymouth and Pontiac. The megasale will take place Sept. 14, 2019, in Red Oak, Iowa, at the Montgomery County Fairgrounds. A 1969 Plymouth Road Runner infected Coyote with a love for Detroit muscle when he was just a teenager, and his desire quickly turned into an obsession. He's spent the past 40 years finding, buying and working on a variety of makes and models. Unlike some collectors, Coyote didn't discriminate against certain brands and has rides from each of the Big 3 automakers. Included in the auction are Camaros, Satellites, Super Bees, Chargers, Challengers, Barracudas, Coronets, GTOs, Mustangs, Cutlasses and others. Possibly the most intriguing aspect of the auction is that all of these cars will be sold as-is with no reserve. Many of them will need work, depending on quality standards, but this seems like a golden opportunity to find a classic car without leaving a bank account in shambles.  The auctions are open for bidding online now, and the full auction will take place on September 14. Check out the full listings and bid at VanDerBrink Auctions.

Reuss says GM diesel plans are still on pace

General Motors is not going to let Volkswagen's diesel emissions scandal ruin its plans for a new line of efficient, torquey oil-burners, the company's Executive Vice President Mark Reuss said at a recent press event. "No way," Reuss responded when asked about cancelling the upcoming diesel-powered Chevrolet Cruze and other vehicles. "The Cruze Diesel is too good not to do it." Slated for 2017, the compact is just the latest member of a diesel offensive that initially kicked off with the first Cruze Diesel and most recently saw the introduction of the oil-burning Chevy Colorado and GMC Canyon. Reuss also reassured those in attendance that there was "no delay" in development of Cadillac's diesel lineup. Cadillac is working on a line of four- and six-cylinder turbodiesels for Europe. They'd make their way into the US market, too, eventually. "It's a question of timing," Reuss said, according to Car and Driver. Volkswagen's diesel emissions scandal has caused automakers across the globe to at least reanalyze their diesel strategy. Jaguar Land Rover, which is preparing several diesel-powered models for the US market, went on record late last month to reaffirm its commitment to diesel. Related Video: Featured Gallery 2014 Chevrolet Cruze Turbo Diesel: Quick Spin View 14 Photos News Source: Car and DriverImage Credit: Copyright 2015 Seyth Miersma / AOL Green Cadillac Chevrolet GM Diesel Vehicles