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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.

Chevy Malibu Hybrid wins 2016 Connected Green Car of the Year

From the Washington Auto Show today, Green Car Journal's Ron Cogan announced three different fuel-efficient vehicle awards. They were: 2016 Connected Green Car of the Year: Chevy Malibu Hybrid 2016 Luxury Green Car of the Year: Volvo XC90 T8 2016 Green SUV of the Year: Honda HR-V The Volvo was nominated in two categories, but it did not win the Connected Green Car of the Year. Speaking of non-winners, the other green SUV finalists were the BMW X1 XDrive28i, Hyundai Tucson, Mazda CX-3, and Toyota RAV4 Hybrid. The other Luxury Green Car finalists included the BMW x5 xDrive40e, Lexus RX 450h, Porsche Cayenne S E-Hybrid, and the Mercedes-Benz C350e. Finally, the Audi A3 e-tron, BMW 330e, Toyota Prius, and Volvo XC90 T8 were the runners up for Connected Green Car. 2016 Connected Green Car of the Year, Green SUV of the Year, Luxury Green Car of the Year Winners Announced WASHINGTON, Jan. 21, 2016 /PRNewswire/ -- Green Car Journal has announced the winners of its prestigious 2016 Green Car Awards at a press conference held today during the Washington Auto Show's Public Policy Day in Washington DC. Distinguished as 2016 Luxury Green Car of the Year™ is Volvo's new XC90 T8. The Chevrolet Malibu Hybrid tops the field as 2016 Connected Green Car of the Year™ and Honda's HR-V earns Green Car Journal's 2016 Green SUV of the Year™. "These are stand-out vehicles in an increasingly sophisticated and appealing field of 'green' cars," said Ron Cogan, editor and publisher of Green Car Journal and CarsOfChange.com. "To make the cut as a finalist is a real achievement in itself considering the considerable competition in the market today. Rising to the top as award winners means these three exceptional vehicles set a benchmark in the auto industry's effort to create vehicles that are desirable and efficient, while also achieving environmental milestones so important for our driving future." The Green Car Awards are a key feature of The Washington Auto Show, the "public policy show" on the auto show circuit and one that puts a priority on safety and sustainability. "We are extremely proud of our partnership with Ron Cogan, whose eagerly anticipated suite of awards help shape the national conversation on the innovations that will drive our industry and country forward," said Geoff Pohanka, chairman of The Washington Auto Show.