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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 again delays plant that will build the Silverado EV

  General Motors Co. will again push back the planned opening of an electric pickup truck plant in suburban Detroit and has delayed a Buick plug-in amid uncertain growth in battery-powered car sales. Mary Barra, the company’s chief executive officer, told analysts Tuesday on an earnings conference call the automaker is postponing until mid-2026 the opening of its Orion Assembly factory, which will make the Chevrolet Silverado EV. This is the second delay for the plant, which was originally slated to start production in late 2024. Shares of the automaker fell 4.1% to $47.52 as of 9:39 a.m. in New York. The stock is up about 32% so far this year. The delay is a main reason why GM wonÂ’t be able to meet its previous goal of having production in place to make 1 million EVs by the end of next year. The company said they will add production as buyers show more interest in electric vehicles. “We continue to make sure we continue to scale the business to customers and where they are at,” GM Chief Financial Officer Paul Jacobson said on a call with reporters. GM reported on Tuesday a 60% jump in second quarter profit compared with a year ago, topping Wall StreetÂ’s expectations on strong demand for its traditional gas-powered trucks in the US market.

2023 Chevy Equinox price goes up a few hundred bucks

Chevrolet and GMC have uploaded the configurators for sibling crossovers the 2023 Chevy Equinox and 2023 GMC Terrain. Both get a few changes to improve performance, and new paints. GM jettisoned the turbocharged 1.5-liter gas engine making 170 horsepower and 203 pound-feet of torque in both vehicles. Replacing it is a different turbocharged 1.5-liter gas engine making 175 hp and 203 lb-ft. The Equinox sends its power through a six-speed transmission, the Terrain fits a nine-speed transmission. On the Equinox, fuel economy in standard front-wheel drive trims holds steady, but the AWD trims lose one mile per gallon in their city and combined EPA ratings. On the Terrain, FWD trims lose one mile per gallon across the board, the AWD trims lose one mile per gallon in the city only. Both models also upgrade to an electro-hydraulic brake system, leaving vacuum-assisted braking behind. The Equinox color palette drops Cherry Red Tintcoat, Seaglass Blue Metallic and Silver Ice Metallic for replaces with Harvest Bronze Metallic, Radiant Red Tintcoat, and Sterling Gray Metallic. Buyers who want the razzle dazzle of the Equinox's optional Blackout and Redline Edition Packages are out of luck at the moment, both appearance flourishes unavailable to order. The Terrain's paint menu drops Cayenne Red Tintcoat, Hunter Metallic, and Quicksilver Metallic for Deep Bronze Metallic, Sterling Metallic, and Volcanic Red Tintcoat. All-wheel drive can be added to any Equinox and Terrain trim for $1,600, save for the Terrain AT4 and Denali that come standard with AWD. Prices for the 2023 Chevy Equinox after the $1,395 destination charge, and their differences from 2022, are: Equinox LS: $27,995 ($300) Equinox LT: $29,095 ($300) Equinox RS: $32,095 ($100) Equinox Premier: $33,195 ($300) New pricing for the 2023 GMC Terrain can only be seen when you visit the configurator's Summary page. The initial Build & Price page shows MSRP before the $1,500 premium on every trim to that pays for the mandatory OnStar with Connected Services plan. After the $1,395 destination charge, the new prices are: Terrain SLE: $31,295 Terrain SLT: $35,295 Terrain AT4: $37,395 Terrain Denali: $39,995