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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

Recharge Wrap-up: BYD unveils 60-ft electric bus, Honda sticking with hybrids in Europe

BYD has debuted a 60-foot electric bus at the American Public Transportation Association Expo in Houston, TX. The Lancaster bus, as it is called, has a 120-passenger capacity and can drive over 170 miles on a single charge. The articulated bus features low floors and no steps, thanks to in-wheel hub motors. BYD also displayed a 40-foot electric bus that drove the 1,500 miles to the show under its own power (recharging along the way, of course). Read more in the press release below. Honda says it will continue to sell hybrids in Europe, despite the fact that it has stopped selling the CR-Z and Insight due to slow sales. "Our focus at the moment is on our 1.6-liter diesel but we haven't forgotten about hybrid technology," says Honda Europe's Philip Ross. Honda will sell the next-generation Fit (badged as the Jazz) in Europe when it launches next summer, and will sell the next-gen hybrid version beginning in 2016. Honda sold 4,500 of the Jazz hybrid in Europe last year. Read more at Automotive News. XL Hybrids is selling its XL3 Hybrid Electric Drive System in California. The news comes after the California Air Resources Board issued an executive order allowing the aftermarket hybrid conversion for 2012-2014 Chevrolet Express and GMC Savana vans. The XL3 Hybrid regenerative braking conversion increases real-world mpg by about 25 percent. Read more in the press release below. NRG eVgo has finished installing 60 charging stations at the Sony Pictures Entertainment studio lot and offices in Culver City, California. The Level 2 chargers, which will be managed by NRG eVgo, allow employees to charge their EVs during the workday. An average of 90 EVs and PHEVs park at the studio headquarters every day, thanks in part to Sony Pictures' Alternative Vehicles Incentive program for its employees. Learn more in the press release below. Pennsylvania's Public Utility Commission will allow operators of EV charging stations to set prices based on kilowatt hour usage. This change ensures that drivers pay for the actual energy they use, rather than the time they spend charging, since different cars can charge at different speeds. Car Charging Group has already begun using the per-kWh fee structure at its charging stations throughout the state. Other states that allow kWh pricing are California, Colorado, Florida, Hawaii, Illinois, Maryland, Minnesota, New York, Oregon, Virginia and Washington. Read more in the press release below.

Recharge Wrap-up: Toyota FCV Rally Car To Compete, Barra bullish on Chevy Volt

The Toyota FCV will compete in the last stage of the 2014 Japanese Rally Championship. The sport-tuned hydrogen-powered car will tackle the 177-mile Shinshiro Rally on November 1 and 2, emitting no greenhouse gases in the process. The rally course will help prove the safety of the vehicle before it goes on sale in Japan in the next several months. The Toyota FCV, rumored to be called "Mirai" in Japan, will begin sales there before April, according to Toyota, and in the summer in the US and Europe. Read more in the press release below. Carsharing is becoming more popular, and more visible, throughout the world, including the US. According to WardsAuto columnist John McElroy, 18 percent of US drivers have used some sort of carsharing service. Additionally, he says 60 percent of Americans are familiar with Zipcar and Uber. Mercedes' Harald Kroeger says promotions like free parking for carshares in Stuttgart are encouraging growth for Daimler's carsharing service, Car2go. Read more at WardsAuto. Ethanol is being help up by rail transport, according to ethanol producer Green Plains. More and more stations are carrying E15 blend gasoline, but grain producers have complained that crude oil is given higher priority by the rail lines shipping it, which rail companies deny. Union Pacific and BNSF Railway say they are stepping up service to make sure that ethanol can be shipped reliably to customers. Read more at Omaha World-Herald. General Motors "has placed a significant bet [on] the electrification of the automobile," says CEO Mary Barra. In a speech to the Detroit Economic Club this week, she spoke about the Chevrolet Volt, and its importance to GM's future. While Barra admits the Volt's success has been "not everything we wanted," it has provided experience, and shows that EVs have "an important role in the future of GM." The new Volt is more refined, stores more energy, has longer range, uses less fuel and is a big investment for Michigan. She announced that the new Volt's electric drive system will be built in Warren, and that all of its major components will be made in Michigan. "Silicon Valley doesn't have a corner on the market for innovation, creativity and drive," says Barra. "These qualities exist here – in this region – as well." See the speech's highlight video and read more in the transcript below. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.