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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.

This week in EVs: Electric Jeeps, Chevy Equinox, reborn VW bus

There's going to be tons of car news next week as the Detroit Auto Show makes its return after 48 years. OK, so the pandemic and the show's shifting calendar only made it feel like 48 years, but January 2019 was still a long time ago. As we await that wave of headlines, let's look back at the substantial week that already was, specifically in terms of the electric car news that broke. Electric Jeep Recon and Wagoneer S blaze trail to brand's EV future Jeep declared Thursday to be 4xe Day as it revealed loads of previously unknown information about its future electrification efforts. The biggest surprise was the extremely cool and 100% electric Jeep Recon. Although it looks like a Wrangler, it's absolutely not a Wrangler replacement, and is indeed quite different for reasons besides its powertrain (independent front and rear suspension, fully enclosed fenders, fixed roof). As the photos attest, though, you'll be able to remove the doors and rear-quarter windows just like a Wrangler. And again, it's electric. Expect the Recon to be one of the most eagerly anticipated new vehicles over the next couple of years. Yes, years, plural. Production will start in 2024 with reservations accepted starting early next year. Jeep Recon View 5 Photos   There was then the Wagoneer S. Despite the name, it isn't a sportier Wagoneer variant or even an electric Wagoneer. In fact, the name is temporary according to chief designer Ralph Gilles. This sleek SUV, which sure looks like Jeep's attempt at a Range Rover Vilar (not a bad thing), will apparently have a 600-horsepower electric powertrain. It too will be produced in North America starting in 2024 with reservations starting early next year. Jeep Wagoneer S View 4 Photos   There actually WILL be an electrified Wagoneer, however: the Grand Wagoneer 4xe PHEV. That's good since the Grand Wagoneer gets pretty atrocious fuel economy. Details were light regarding specs, but we did get a half-decent photo. Finally, the first of these electrified Jeeps to launch will be the Avenger. Yes, Chrysler/Stellantis is dusting off an old Dodge name for a Jeep. That Dodge in question wasn't sold in Europe, though (good for them), which is important since the Jeep Avenger will only be sold on the other side of the pond. It's mechanically based on the same platform as several French Stellantis EV SUVs, and only goes 249 miles on the far more generous European WLTP test cycle.