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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 recalls Colorado, Canyon, and Malibu for airbag problem

The Basics: General Motors will recall and issue a stop sale on 1,740 total examples of the 2016 Chevrolet Colorado, Malibu, and GMC Canyon. This includes 1,579 units in the US and 161 in Canada. The Problem: The second stage of the driver front airbag inflator might not be present. If this happens, the airbag won't fill as quickly as it should in a high-speed crash, which could increase the risk of injury, according to Reuters. This is not related in any way to Takata's inflator problems, and these parts come from a different supplier. Injuries/Deaths: None reported. The Fix: GM will replace the vehicles' airbag assemblies. If You Own One: GM spokesperson Tom Wilkinson told Autoblog he wasn't specifically sure when recall repairs would begin but said it would be "shortly." He expects the fixes to happen "quickly" because of the small number of affected vehicles, and many of them are either in transport or already in dealer stock. More Information: GM recalled the 2015 Canyon and Colorado in 2014 for a completely separate airbag issue. In that case, a manufacturing error improperly wired the connectors. Related Video: GM Statement GM is recalling 1,579 MY 2016 Chevrolet Colorado, GMC Canyon and Chevrolet Malibu vehicles in the United States and 161 in Canada to replace driver-side front airbags. The second stage of the airbag may not deploy properly in certain high-speed crashes. During a routine quality inspection, it was determined that a component required for a second-stage/high-output deployment was not loaded during the inflator build. Dealers will replace the driver-side front airbag assembly. There have been no reports of crashes or injuries related to this issue. This issue is unrelated to the ongoing Takata recalls.

Opel's version of the Chevy Bolt will confuse people at Paris Motor Show

Two things are now official. First, Opel will reveal the Ampera-e, or the European version of the Chevrolet Bolt, at the Paris Motor Show in October. Second, General Motors has outdone itself in brand confusion, topping the Bolt/Volt ridiculousness. Opel isn't giving a single-charge range for the Ampera-e but the company is promising a "significantly longer range" than other electric vehicles. The Bolt is estimated to have a 200-mile range on the EPA scale, so whatever the Opel achieves on the European cycle will be done with the same batteries and motor as the Chevy. Opel is also looking to appeal to the auto enthusiasts with other factoids, which are basically just Bolt stats translated into metric. For instance, the Ampera-e will be able to go 0 to 50 kilometers per hour (which is 31 miles per hour to us Americans, but we're talking Europe here) in just 3.2 seconds. And for those looking to stay connected, as many as seven mobile devices can attached to the car's wireless hot spot. GM said in February that the European of the Bolt would be available across the pond next year, so the most recent bit of news isn't shocking. Still, General Motors continues to create confusion between all-electric Bolt and the extended-range plug-in Volt. It's already been reported that the Korean symbol and pronunciation of what is "B" in English is identical to the English "V," meaning that there is no difference between "Bolt" and "Volt" in that country (though there are no plans to sell the Bolt in South Korea as of yet). Now, in Europe, they're taking the name they used to use for the European of the Volt — Ampera — and merely adding an "-e" at the end of it. For those looking to be less confused, take a look at Opel's press release here. Related Video: Featured Gallery 2017 Opel Ampera-e: Paris 2016 View 11 Photos News Source: Opel via Hybrid CarsImage Credit: Live photos copyright 2016 Drew Phillips / Autoblog Green Paris Motor Show Chevrolet GM Opel Electric Chevy Bolt volt ampera opel ampera-e ampera-e