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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

New Chevy Malibu helps parents monitor teen driver's performance

For teens, a driver's license can represent freedom. For parents, it can represent fear. Now there's a way parents can alleviate some of their worries and monitor their teen drivers. The 2016 Chevy Malibu, which debuted Wednesday at the New York Auto Show, contains a new feature that tracks driving performance and helps inexperienced drivers rein in some of their more dangerous habits. Accessed through a password in the car's infotainment system, parents can learn how far their child has driven, how fast they've gone and how many times they've braked hard, among other features. "It's an in-vehicle report card that gives parents information," says Mary Ann Beebe, one of the lead engineers who designed the system. "It's meant to be used as a teaching tool. Parents can sit down and talk with their teen about, 'Here are some areas where you're doing well, and here's some where you can use improvement.'" Car accidents are the leading cause of death for teens ages 16 to 19, and only last week, AAA released a study that found their driving behavior can leave them particularly susceptible to crashes. General Motors had sought ways to help educate and train younger drivers. In an era where data can be harvested from cars, monitoring performance is one way to provide information. Parents access the Teen Driver system in the car through a PIN-number entered into the Malibu's infotainment system. The report card can only be seen in the car – so far, it's not available via a smartphone app, like some other types of on-board diagnostic information. The system is activated by the use of a specially programmed key fob that lets the system know who is driving the car. Once the vehicle recognizes the key fob, it takes preventive measures to ensure safer conduct behind the wheel: Until the driver and front passenger buckle their seat belts, the radio is muted. Safety systems such as forward-collision assist and electronic stability control are automatically turned on. Parents can preset preferred speed limits, and drivers will hear a warning if that sound is exceeded. "We have these great technologies, and we want to make sure we turn them on for the teen," Beebe said. There are no geo-location aspects of the program, and data is stored on the car, not uploaded to the Cloud or even seen by General Motors, she said.

Editors' Picks August 2021 | Honda Civic, Mercedes S-Class and more

This month of Editors' Picks saw us award the honor to a couple of redesigned stalwarts like the Honda Civic and Mercedes-Benz S-Class. Plus, a new crossover that splits the difference between the compact and subcompact class takes home the prize. On top of this, we'll introduce you to a new term: midcompact. We'll be using this to describe those in-between crossovers that are a tad too small to be considered compact, but too large to neatly fit into the subcompact class. For a few examples of these "midcompact" cars, we'll point you to the Ford Bronco Sport, Kia Seltos and VW Seltos. In case you missed our previous Editors' Picks posts, here’s a quick refresher on whatÂ’s going on here. We rate all the new cars we drive with a 1-10 score. Cars that are exemplary in their respective segments get EditorsÂ’ Pick status. Those are the ones weÂ’d recommend to our friends, family and anybody whoÂ’s curious and asks the question. The list that youÂ’ll find below consists of every car we rated in August that earned an EditorsÂ’ Pick. 2021 Genesis G70 2022 Genesis G70 View 26 Photos Quick take: Genesis hits all the right buttons with its G70. It's attractive, fun to drive and can be had for a fair price. Enthusiasts should give it a shot before taking home one of its German competitors. Score: 8 What it competes with: Alfa Romeo Giulia, Lexus IS, Acura TLX, Infiniti Q50, Audi A4, BMW 3 Series, Mercedes-Benz C-Class, Cadillac CT4, Volvo S60 Pros: Sharp handler, stunning exterior looks, strong engines Cons: Average interior, loses manual option, small backseat and trunk From the editors: News Editor Joel Stocksdale — "I was already a big fan of the Genesis G70. It has brilliant handling, and the twin-turbo V6 is a beast. It's even a bargain against the competition. And Genesis just made it look a lot better. I wish they'd done a bit more to update the interior, but it's still not a bad cabin. Besides, you won't think too much about it when you're hustling down a fun back road." Features Editor James Riswick — "Yes, it is small, but in a sport sedan segment where "sport" means increasingly less, the G70 still delivers (in part because of that smallness).