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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

Most of the US won't get 2016 Chevy Volt

Every major plug-in vehicle launch in the US has been a patchwork operation, with automakers focusing their initial efforts on targeted locations like California where they expect to sell the most units. Today, we learned that even five years into the plug-in car project, the game remains the same. According to GM, the second-gen Chevy Volt is going to be rolled out in the same manner. In fact, GM is limiting availability of the 2016 model year Volt so much that most of the US will not have access to the car at all. For 39 states, the second-gen Volt will first be available as a 2017 model year vehicle at some point in the spring of 2016. When GM announced the buying process for the new Volt, it made it clear that dealers in California would be the first to place their orders. Hybrid Cars now reports that the first deliveries will be also limited to California and 10 other states that follow the California Air Resourced Board (CARB) rules: Connecticut, Massachusetts, Maryland , Maine, New Hampshire, New Jersey, New York, Oregon, Rhode Island, and Vermont. GM spokesman Kevin Kelly told AutoblogGreen that this is all according to plan. "Chevrolet has a shortened model year for the 2016 Chevy Volt that will have a limited distribution network," he said. "The 2016 Volt will be sold in our strongest EREV markets. The 2017 Chevrolet Volt will begin production early this spring and will be available throughout the country." It appears that non-CARB state Volt customers will be able to order their Volts starting October 1, according to documents posted on Hybrid Cars, where we also learn that 2016 Volt production for California started in August, will begin in late October for the other 10 CARB states, and in early 2016 for the rest of the US. Unsurprisingly, dealers outside of the 11 CARB states have been complaining that they can't order the much-anticipated new Volt for their customers just yet. Related Video:

Chevy Volt 'Drive My Way' test cuts out the dealership

Last month, the 2016 Chevrolet Volt won the 2016 Green Car of the Year Award at the Los Angeles Auto Show. Awards are nice, but General Motors is now offering to make some folks' familiarity with the second-generation Volt a little more personal. Chevy is enacting what it calls the "Drive My Way" program, where the automaker brings a 2016 Volt directly to some prospective buyers for a 30-minute test drive with no dealer required, according to Hybrid Cars. Kind of like Tesla, only different. RedCap Valet is administering the program and is helping to track drivers' behind-the-wheel behavior, including keeping records on speed, acceleration, and braking habits. General Motors representatives didn't respond to a our request for further details about how many people will be chosen for the program or how these folks were picked to participate in "Drive My Way." Through November, the Volt's sales were down 23 percent from a year earlier to about 13,000 units, so any momentum for the 2016 version is a good thing. If you're just looking for numerical improvements, the new version has got you covered. It can go as far as 53 miles on electricity alone (about 15 miles further than the previous generation model) and it's got better miles per gallon and MPGe ratings as well. Of course, numbers alone aren't usually enough sell a car. Experience counts. So we ask, dear readers, if having a 2016 Volt brought to you for a half-hour test drive might make it more likely that you'll buy one of these extended-range plug-in vehicles. While you're waiting for a new Volt to arrive at your house, you can take a look here for our First Drive review. Related Video: Featured Gallery 2016 Chevrolet Volt: First Drive View 24 Photos News Source: Hybrid Cars Green Chevrolet GM test drive volt extended-range plug-in