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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 426,000 sedans over faulty transmission shift cable

General Motors is recalling some 426,240 sedans that may have a faulty transmission shift cable, according to a National Highway Traffic Safety Administration report this morning. The recall concerns a fault within four-speed automatic transmissions equipped on 2007-2010 Saturn Aura models, and 2008-2010 Chevrolet Malibu and Pontiac G6 models.
The report specifies that tabs on the transmission shift cable may fracture and separate. Such a fault could cause a discrepancy between the actual position of the transmission and the apparent position of the shift lever.
GM is currently working to notify owners of the vehicles in question, and dealers will check and replace shift cables free of charge. Scroll down to read the complete NHTSA report.

Evatran, Bosch will sell wireless home charger for as low as $1,998*

At the Consumer Electronics Show in Las Vegas today, the big news for plug in vehicles is that they can now start to ditch the plug. As expected, the system costs around $3,000 and is available for both the Nissan Leaf and the Chevrolet Volt. For the first 250 customers, though, Evatran is offering $1,000 off the standard price, a 30 percent discount. Deliveries start next month and Evatran says it expects the discounted units to all be snatched up in the first half of the year. The wireless charger charges as quickly as conventional corded systems. Called the Plugless Wireless EV charger, the 240-volt station will be installed by Bosch and needs a specific adapter to be used with the Volt or the Leaf (the Leaf version costs $100 more). So, any two-EV families out there will need to pony up double if there's a Chevy and a Nissan in the garage. Of course, since the Plugless system only works with older Leafs (2010-2012 model years - but with any Volt), any late adopters will not be able to take advantage of the new technology, for now. Evatran says the wireless charger "charges the Volt and Leaf as quickly as conventional corded systems and all vehicle features, such as charge-timers and phone applications, can be used seamlessly with the Plugless system." After the first 250 units, standard prices for the wireless chargers take effect again: $2,998 (Volt) and $3,098 (Leaf). Evatran says it will announce wireless chargers for additional vehicles and model years later this year. Evatran and Bosch offer Promotional Pricing as low as $1,998 to first 250 PLUGLESS™ Wireless EV Charging Customers LAS VEGAS, Jan. 6, 2014 /PRNewswire/ -- Evatran Group, Inc. ("Evatran"), in partnership with Bosch Automotive Service Solutions, announced today at the 2014 Consumer Electronics Show that it is offering reduced promotional pricing to the first 250 customers who opt to Go PLUGLESS with their electric vehicle ("EV") experience. The PLUGLESS system offers a convenient, wireless charging alternative to the repetitive process of unplugging and plugging-in electric vehicles. The reduced pricing includes all charging hardware and is as much as a 30% discount off the system's standard MSRP. The discount is available only to the first 250 customers. Initial shipments of the PLUGLESS system, the first wireless EV charging product in the world available to individual EV drivers, will begin in February 2014.