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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

Top 11 Lego Technic cars to buy on Amazon in 2024

Autoblog may receive a share from purchases made via links on this page. Pricing and availability are subject to change. I recently got a birthday wish list from my 11-year-old nephew, and I couldn't help but smile when I saw “Lego Technic Cars” at the top. Lego isnÂ’t a phase, itÂ’s a lifestyle. Once a Lego fan, always a Lego fan. In fact, IÂ’d be willing to bet that many of you reading this right now have some kind of Lego vehicle in a box somewhere, or better yet, on display in your home. While theyÂ’re not necessarily cheap, getting into building Lego Technic vehicles doesnÂ’t have to bankrupt you, either, unless you go for the $400 Lamborghini right off the bat. Here are 11 of our favorite Lego Technic vehicles on Amazon, right now, ranging from an affordable $35 all the way up to $450. LEGO Technic Ford Mustang Shelby GT500 Ages 9+ (544 Pieces) - $39.99 (20% off) One of my first and favorite model cars growing up was a first-gen Ford Mustang GT350, so this GT500 for under $40 is right up my alley. At 544 pieces and made for ages 9 and up, the GT500 is a considerable step up from Grave Digger but a great starter to a Technic collection nonetheless. It isnÂ’t the most accurate-looking vehicle in this list, but the AR app and the fact that it can drive make it a worthwhile purchase. $39.99 at Amazon LEGO Technic Formula E Porsche 99X Electric Ages 9+ (422 Pieces) - $49.99 Not a Ford fan? Not a problem. This Formula E Porsche 99X is the same price and better looking than the GT500. Even though there are 122 fewer pieces in this Porsche set, it has a level of detail seen in much more expensive Technic sets including numerous decals and a pull back motor.  $49.99 at Amazon LEGO Technic Jeep Wrangler Ages 9+ (665 Pieces) - $54.99 This is the set I ended up going with for my nephew, not because I think it is the coolest, but because for the price, I think you get the most bang for your buck. 665 pieces is over 50% more than the comparatively priced Porsche 99X and it also scratches the nostalgia itch for me: The first-ever model vehicle I built was a yellow Jeep Wrangler Sahara. This Wrangler Rubicon has definitely had some aftermarket mods like the front winch, which makes it one of the coolest Technic sets under $60.  $54.99 at Amazon LEGO Technic Monster Jam Grave Digger Ages 7+ (212 Pieces) - $34.16 If ever there was a gateway Lego Technic, this Grave Digger is it.

Car and Driver reveals spy shots of mid-engine 2017 Corvette

Some news in the car world is perennial, and some is perennially wrong. Typically news about some upcoming mid-engined Chevy Corvette has fallen into the latter category, with rumors never yet generating a road car. This time could very well be different. Car and Driver has some exclusive photographs of what would appear to be a Corvette test mule with a mid-mounted engine. The car in question might look like a Holden SSV ute that's undergone some indelicate modification, but C/D editor Don Sherman assures that the bones of a C8 'Vette live within that crude bodywork. Sherman points to the closeness of the cabin to the front axle as clue number one of this car's mid-engine attitude, as well as the powertrain-sized space between the back of the seats and the rear axle. The roof and glasshouse are all clearly plucked from the current C7, and the gas tank filler positioned on the B-pillar is another huge clue. The buff book estimates that the mule points to a timeline for sale, even. Testing on this level could mean a mid-engined C8 ready for sale in as few as 20 months, or for the 2017 model year. Click over to Car and Driver to have a close look at this important set of spy photographs, as well as a rendering of what a finished C8 might ultimately look like