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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

'84 MotorWeek Cherokee, Bronco and Blazer comparison indulges your SUV nostalgia

These days, truck-based, full-frame SUVs are somewhat of a rarity on the auto landscape due to the rapid rise in popularity of easier-driving, car-based crossovers. Although, without the gradually building popularity of these chunky, high-riding vehicles decades ago, it's unlikely that America's roads would be filled with so many CUVs today. In its latest dig into the archives, MotorWeek has found a 1984 comparison test of a trio of these early Sport Utility Wagons, as long-time host John Davis called them, that helped get acceptance of this segment going. This is a red, white and blue test of the SUVs from American automakers at the time and pits the Chevrolet Blazer, Ford Bronco and Jeep Cherokee (specifically in Wagoneer guise) against each other. Driving manners and interior usability are considered in the evaluation, but Motorweek actually takes these vehicles off road, too. Among the bigger revelations is the improvement in on-road ability in the past 30 years. While specific 0-60 times aren't given, all three models take around 10 seconds just to get to around 50 miles per hour in the 500-feet on-ramp acceleration test. Check out this clip to see just how far this segment has progressed in the past three decades or just get a blast of nostalgia from these now vintage models. News Source: MotorWeek via YouTube Chevrolet Ford Jeep SUV Off-Road Vehicles Classics Videos Ford Bronco chevy blazer

Recharge Wrap-up: Indianapolis to switch 425 fleet vehicles to EVs, Chevy Corvette provides bat habitats

Indianapolis will deploy 425 battery electric and plug-in hybrid vehicles as part of its municipal fleet by 2016. The fleet will include such cars as the Nissan Leaf, Chevrolet Volt and Ford Fusion Energi. The city will also reduce its overall fleet by 100 vehicles. In all, the revised group - called the "Freedom Fleet" - will save $8.7 million and 2.2 million gallons of gasoline over 10 years. Read more at Hybrid Cars. EVs with longer range would make vehicle-to-home and vehicle-to-grid energy management systems more practical for the US. The idea of using EVs as energy storage for emergencies or times of high grid demand is currently being tested in Japan with Nissan's Leaf-to-Home system. The US is also interested in such capabilities, but the higher average energy use of American households would make larger batteries in EVs ideal for grid storage applications. Read more at Green Car Reports. LG Chem has broken ground on its EV battery plant in Nanjing, China. The factory, when constructed, will have a capacity of producing batteries for 100,000 cars per year according to the Korean company. The plant will supply batteries for Chinese automakers such as SAIC and Qoros. Construction is expected to be finished by the end of 2015 and LG Chem expects revenue of more than $933 million by 2020. Read more in the press release below. General Motors is using adhesive used in the Chevrolet Corvette Stingray to create habitat for threatened bat species. Artificial bat caves could help alleviate white-nose fungus that leads to diminished bat populations. Leftover adhesive is used to create stalactites in the artificial caves, allowing them more structure to hang from. GM has also provided Volt battery covers to create nesting habitats for bats, which eat harmful insects and help pollinate plants. See the videos and read more in the press release below. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. LG Chem officially breaks ground for China EV battery plant Seoul, Korea - Oct 30, 2014 – LG Chem, Korea's leading manufacturer of advanced batteries, held a ground breaking ceremony for the construction of electric-car battery plant in Nanjing, China, to meet growing demand in the world's biggest car market.