2014 Chevrolet Silverado 1500 Lt on 2040-cars

Auto blog

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

Even if GM does close all 5 of those plants, it'll still have too many

DETROIT — General Motors' monumental announcement on Monday that it will close three car assembly plants and two powertrain plants in North America and slash its workforce will only partially close the gap between capacity and demand for the automaker's sedans, according to a Reuters analysis of industry production and capacity data. Sales of traditional passenger cars in North America have been declining for the past six years and are still withering. After GM ends production next year at factories in Michigan, Ohio and Ontario, it will still have four U.S. passenger-car plants — all operating at less than 50 percent of rated capacity, according to figures supplied by LMC Automotive. In comparison, Detroit-based rivals Ford and Fiat Chrysler Automobiles will have one car plant each in North America after 2019. The Detroit Three are facing rapidly dwindling demand for traditional passenger cars from U.S. consumers, many of whom have shifted to crossovers and trucks. Passenger cars accounted for 48 percent of retail light-vehicle sales in the United States in 2014, according to market researchers at J.D. Power and Associates. This year, sedans will account for less than a third of light vehicle sales. That shift in turn has left most North American car plants operating far below their rated capacities, while many SUV and truck plants are running on overtime. The collapse in passenger-car demand is a challenge for nearly all automakers in the United States, including Japan's Toyota and Honda, which have the top-selling models in the compact and midsize car segments. Toyota executives said last month they are evaluating the company's U.S. model lineup. But Toyota also plans to build compact Corolla sedans at a new $1.6 billion factory it is building in Alabama with partner Mazda. The obstacles facing GM in its plans to close more auto factories became apparent on Tuesday as U.S. President Donald Trump threatened to block payment of government electric vehicle subsidies to GM. While it is not certain that Trump unilaterally has the power to do that, he made it clear he intends to use his office to pressure the company to keep open a small car plant in Ohio that GM says will stop building vehicles in March.

See all seven colors available on 2016 Chevy Volt

General Motors has been happy to promote the 2016 Chevy Volt in the shiny blue color. On the company's website for the car, though, we can find all seven exterior colors, thanks to the magic of digital technology. We went through the site and played around with the option picker and put together a gallery of all the colors the new Volt will be available in as well as the five interior options. For the record, the exterior colors are: Kinetic Blue Metallic, Iridescent Pearl Tricoat, Summit White, Silver Ice Metallic, Mosaic Black Metallic, Siren Red Tintcoat, Heather Grey Metallic. You'll be forgiven if you can't quite tell the difference between the Pearl and the White in these images, but both colors have been available on the 2015 model year Volt. GM spokesperson Michelle Malcho told AutoblogGreen that buyers do have a preference, with Pearl accounting for 10 percent of the sales and Summit White accounted for 17 percent. The Pearl color is a tri-coat and thus has a $995 price premium, which was likely a factor as well. The interior of the new Volt will have two cloth options (Dark Ash and Jet Black) and three leather choices (Dark Ash, Jet Black, and Jet Black/Brandy). That last one will only be available in the LTZ trim level. You can play around with the color adjuster yourself here. Kathy Sirvio, the color and design manager of the Volt design team, told AutoblogGreen that, "Kinetic Blue is a marketing name. At Design we call it 'Blew Me Away'. That is it in a nutshell. The blue color is vibrant, rich and eye catching. It may not sell at the highest volume, as we know from history whites, blacks and silvers are the dominant color sales. However, it will tell everyone who sees it on the street that here comes a new vehicle and it is expressive in all the right ways." The next-gen Volt arrives later this year with a starting price of $33,995. The powertrain upgrades will push the all-electric range to 50 miles and the gas-only fuel economy to 41 miles per gallon. Related Video: