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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

GM says over 40% of new China launches in next five years will be EVs

SHANGHAI — General Motors is planning an electric car offensive in China with more than 40% of its new launches in the country over the next five years set to be electric vehicles (EVs), the U.S. carmaker said on Wednesday. GM's electric vehicles, many of which will be all-electric battery cars, will be manufactured in China with almost all parts coming from local suppliers, the company said in a statement released at its Tech Day event in Shanghai. Reuters reported earlier on Wednesday that GM was planning to overhaul its Chinese line-up to stem a slide of sales after more than two decades of growth in a country that contributes nearly a fifth of its profit. GM's new China boss Julian Blissett told Reuters that new technologies, such as EVs and cars with near hands-free driving for highways, would play a key role in GM's China initiatives, which are part of a push to get annual sales in the country back to the 4 million peak it hit in 2017. GM did not say in its statement how many new or significantly redesigned models it was planning to launch in China over the next five years. "China will play a crucial role in making our vision a reality," GM CEO Mary Barra said in the statement, referring to its initiative to create what it describes as a future of "zero crashes, zero emissions and zero congestion" through electrification and smart-driving technologies. GM has said it plans to invest more than $20 billion in electric and automated vehicles globally by 2025. It was not clear how much of that investment will be spent in China. (Reporting by Norihiko Shirouzu in Shanghai; Editing by David Clarke) Related Video: Green Buick Cadillac Chevrolet GM Electric China

Sunday Drive: Performance comes in many shapes and sizes

The Chevrolet Corvette has always stood out as a bastion of reasonably priced performance, and the latest 'Vette has that in spades. And while its expected starting price of around $120,000 certainly isn't cheap, it's an undeniable deal in the supercar world – remember, this thing'll do 210 miles per hour thanks to its 755-horsepower supercharged V8 engine. And did you get a load of that massive rear wing? Team Corvette's longtime foe, the Porsche 911, is similarly hellbent on ultimate performance. And as a reminder of how long the Corvette/911 rivalry has been melting tires we present the 1990 Porsche 911 as reimagined by Singer you see below. It's beautiful, it's green, and it's packing 500 air-cooled horsepower. You don't have to burn gasoline to go fast, as proven by the second-generation Tesla Roadster, which was revealed as a surprise late last week. Elon Musk says it'll be the quickest car in the world with a 0-60 time of just 1.9 seconds. And while you may not think of a semi truck when you think speed, the Tesla Semi can do 0-60 in 5 seconds flat unloaded, or in 20 seconds with a load of 80,000 pounds. Compared to today's crop of diesel semis, that's amazing. Continuing the truck theme, we present an artists rendering of what the next-generation Ram 1500 pickup may look like. Spoiler alert: Ram's mini-semi look is giving way to something much more modern. There may even be a first-of-its-kind split tailgate at the rear. And if you don't think the Ram 1500 has anything to do with performance, we should remind you that it's one of the cheapest ways to get a tire-shredding Hemi V8 engine in America. 2019 Chevy Corvette ZR1: All hail the 755-horsepower C7 king This is the first Porsche 911 to get Singer and Williams' 500-horsepower engine Tesla Roadster surprise reveal | 'Quickest car in the world' Tesla Semi Truck revealed: Here are the key details This could be the next-generation 2019 Ram 1500 2019 Ram 1500 spotted with split tailgate