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GM will recall more than 3.3 million vehicles in China for suspension defect

BEIJING (Reuters) - General Motors' joint venture in China, Shanghai GM, will recall more than 3.3 million Buick, Chevrolet and Cadillac vehicles stating Oct. 20 because of a defect with the suspension system, China's market regulator said on Saturday. GM Shanghai said in a text message to Reuters that the suspension arm may be deformed under extreme operating conditions, but there are no known casualties related to the issue. The recall includes cars produced between 2013 and 2018, the State Administration for Market Regulation said in a statement. GM will contact those affected and repair the vehicles free of charge, it said. (Reporting by Josephine Mason and Hallie Gu; additional reporting by Yilei Sun; Editing by Shri Navaratnam and Michael Perry)Related Video: Image Credit: Qilai Shen/Bloomberg via Getty Recalls Buick Cadillac Chevrolet Safety

Chinese-made Cadillac CT6 Plug-In starts US sales

General Motors has started US sales of the Cadillac CT6 Plug-In after taking its first domestic deliveries of the China-produced sedan last month. The model is GM's first new plug-in hybrid in the US since the automaker discontinued sales of the ELR extended-range plug-in last year. The arrival and sales, first reported by InsideEVs, were confirmed by Cadillac spokesman Andrew Lipman. Not surprisingly, the sedan isn't cheap, as the CT6 Plug-In is priced at $75,095, or almost $12,000 more than the gas-powered variant, though that figure doesn't include federal and state tax credits for electric vehicles. For that tab, buyers get a 335-horsepower luxury car that can go 31 miles on electricity alone, and 0-60 miles per hour in a little over 5 seconds. The model gives GM three plug-in vehicles to sell to the American public, or the same number US competitor Ford offers. InsideEVs estimates that about 100 of the sedans have been delivered to US dealers, so the car remains a relatively low-volume affair. By comparison, GM's Chevrolet division has sold 5,563 Volt extended-range plug-ins and 3,092 Bolt electric vehicles through March. Cadillac sold 534 units of the ELR in 2016 after moving 1,024 the previous year. GM opted to produce the plug-in hybrid in China because of that country's receptiveness to new models that feature alternative and environmentally friendlier powertrains. Additionally, such production shortens the distance to the CT6's battery maker LG Chem, which is producing the car's battery packs in South Korea. On that note, GM has previously estimated that the Cadillac CT6 Plug-In will move more units in China than in the US. Related Video:

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