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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

2015 Chevy Colorado takes Motor Trend Truck of the Year calipers [w/videos]

The final winner of Motor Trend's prestigious Golden Calipers has been named, with the 2015 Chevrolet Colorado taking the title of 2015 Truck of the Year, likely shocking those who thought Ford's all-aluminum, next-generation F-150 would take the crown. But win the Colorado did, beating not only the new Ford, but two other brutish Blue Ovals in the F-450 and Transit. The midsize pickup also bested its brethren from General Motors, beating the heavy-duty Chevy Silverado 3500, GMC Sierra Denali 2500 and the GMC Canyon, the Colorado's fraternal twin. After an unprecedented two-year stint with the Golden Calipers, Ram sat this year's awards out. Most impressive about the Colorado's victory isn't that it simply beat the US market's other trucks, it did so with a unanimous vote. Praise from MT's editors focused on the trucklet's price, spacious interior, fit and finish and performance. Former Autoblog staffer Jonny Lieberman called the Colorado's steering the best he'd "ever experienced on any truck, full stop," in MT's awards article. "After days of testing, hundreds of miles on the road, and our most rigorous truck testing program to date, our editors unanimously selected the Chevy Colorado as our 2015 Truck of the Year," said MT boss Edward Loh. "Colorado is a smart, capable, and refreshingly honest truck that makes a strong value and efficiency statement. It's perfectly sized and suited for the needs of many of today's truck users." The Colorado joins the 2015 Volkswagen Golf and 2015 Honda CR-V among Motor Trend 2015 award winners. Scroll down for video commentary from General Motors CEO Mary Barra, Loh and a clip of the Golden Calipers being handed over. Also, check out GM's full press release on its big win. The video meant to be presented here is no longer available. Sorry for the inconvenience. The video meant to be presented here is no longer available. Sorry for the inconvenience. The video meant to be presented here is no longer available. Sorry for the inconvenience. MOTOR TREND Names Chevrolet Colorado 2015 Truck of the Year Midsize pickup outclasses competition in design, engineering, efficiency, safety and more 2014-12-03 EL SEGUNDO, Calif. – After its most comprehensive truck evaluation program in history, MOTOR TREND has selected the Chevy Colorado as its 2015 Truck of the Year®. MOTOR TREND's Truck of the Year program is only open to all-new or significantly updated trucks and vans for the upcoming model year.

Toyota tops Kelley Blue Book's Resale Value Awards

Kelley Blue Book announced its annual Best Resale Value Award winners, and we weren't too surprised to see the list dominated by Japanese automakers - mainly Toyota and Honda. KBB hands out the awards based on the projected residual value of mostly all 2013 model year vehicles, and Toyota skated home with a number of awards including 10 of the 22 overall categories and having five of its products in the top 10 for models with best resale value. KBB's Best Resale Value Awards were announced in the same week as the ALG Residual Value Awards, and there were many similarities between both lists, especially when it came to Toyota.
To come up with its winners, KBB measures depreciation over the first five years of ownership, and looks for the cars it expects to hold its value the best after this time; on average, the report says the 2013 model year vehicles will lose 61.8 percent of its value in five years. Of the 22 categories, 15 slots were filled by Toyota, Honda and Nissan products, while the Camaro and Porsche (Cayenne and Panamera) each took home a pair of awards. If Toyota has anything to be upset about in this list of cars, it's that categories for Hybrid/Alternative Energy Car and Electric Vehicle went to the Ford Fusion and Chevrolet Volt, respectively.
The overall top 10 models for the best resale value in 2013 are, in alphabetical order: