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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 recalling 118K Colorado, Canyon pickups over missing hood latches

General Motors has announced a recall of 118,800 Chevrolet Colorado and GMC Canyon pickup trucks due to the possibility of secondary hood latches not being installed at the time of manufacture. The affected vehicles are from the 2010, 2011 and 2012 model years, all of which were built between November 9, 2009 and August 28, 2012.
According to the official National Highway Traffic Safety Administration report, these trucks fail to "comply with the requirements of Federal Motor Vehicle Safety Standard No. 113, 'Hood Latch System.' The hood may be missing the secondary hood latch." In other words, owners of these trucks could find their vehicles' hoods opening unexpectedly while driving.
The official recall campaign is expected to begin on January 17, 2013. Dealers will inspect the affected pickups and if a secondary hood latch is not present, one will be installed free of charge. Scroll down to read the official NHTSA report.

Autoblog's Editors' Picks: Our complete list of the best new vehicles

It's not easy to earn an “EditorsÂ’ Picks” at Autoblog as part of the rating and review process that every new vehicle goes through. Our editors have been at it a long time, which means weÂ’ve driven and reviewed virtually every new car you can go buy on the dealer lot. There are disagreements, of course, and all vehicles have their strengths and weaknesses, but this list features what we think are the best new vehicles chosen by Autoblog editors. We started this formal review process back in 2018, so there's quite of few of them now. So what does it mean to be an EditorsÂ’ Pick? In short, it means itÂ’s a car that we can highly recommend purchasing. There may be one, multiple, or even zero vehicles in any given segment that we give the green light to. What really matters is that itÂ’s a vehicle that weÂ’d tell a friend or family member to go buy if theyÂ’re considering it, because itÂ’s a very good car. The best way to use this list is is with the navigation links below. Click on a segment, and you'll quickly arrive at the top rated pickup truck or SUV, for example. Use the back button to return to these links and search in another segment, like sedans. If youÂ’ve been keeping up with our monthly series of the latest vehicles to earn EditorsÂ’ Pick status, youÂ’re likely going to be familiar with this list already. If not, welcome to the complete list that weÂ’ll be keeping updated as vehicles enter (and others perhaps exit) the good graces of our editorial team. We rate a new car — giving it a numerical score out of 10 — every time thereÂ’s a significant refresh or if it happens to be an all-new model. Any given vehicle may be impressive on a first drive, but we wait until itÂ’s in the hands of our editors to put it through the same type of testing as every other vehicle that rolls through our test fleet before giving it the EditorsÂ’ Pick badge. This ensures consistency and allows more voices to be heard on each individual model. And just so you donÂ’t think weÂ’ve skipped trims or variants of a model, we hand out the EditorsÂ’ Pick based on the overarching model to keep things consistent. So, when you read that the 3 Series is an EditorsÂ’ Pick, yes, that includes the 330i to the M3 and all the variants in between. If thereÂ’s a particular version of that car we vehemently disagree with, we make sure to call that out.