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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

2021 Cadillac Escalade Onyx package adds monochrome logos

The 2016 Cadillac Escala concept showed off a number of features never seen on a Cadillac, one of them being a redesigned, entirely silver, untextured logo. Cadillac had been putting all-silver versions of its crest on the fenders of some of its vehicles, but those bore patterned silver inserts where the yellow, black, red, and blue would have appeared on the standard mark. The Escala logo, on top of being squatter and wider, displayed silver blanks where the colors went. Cadillac Society has found out a similar treatment is on the way for the 2021 Escalade as part of a new Onyx package. This time, instead of being brightwork, a Cadillac spokesperson told CS the logos are "more grey versus [the] silver/chrome [on the fenders]." And for the first time on a Cadillac on the showroom floor, these monochrome badges will appear on the grille and tailgate. Buyers can add a Sport Edition package to the current Escalade, dressing almost all the brightwork grille in gloss black and bolting on a set of 22-inch Midnight Silver wheels. The Cadillac logos, however, stay in color, and the Escalade lettering stays in chrome. That changes with the Onyx package, those gray monochrome crests joined by Escalade lettering in gloss black, plus 22-inch, 12-spoke wheels in high gloss black, and a similar blackout of all the other brightwork as found on the Sport Edition package. The Sport Edition is only available on three of the eight possible colors; a limited color selection could hold true for the Onyx package as well. Branding could get even more interesting when the crest's animated illumination shows up on the Lyriq electric crossover.  The 2021 Escalade will move to the new forked trim strategy, Premium Luxury on one side, Sport on the other, the Onyx package only available on the Sport side. For shoppers who want to go the other way, we're sure the new Escalade will offer something equivalent to the current Radiant Package that makes any Escalade even more impossible to miss on a sunny day. Related Video:    

Ward's reveals annual 10 Best Engines list for 2013

Ward's Auto has released its annual 10 Best Engines award winners. The 2013 list covers the full width and breadth of the internal combustion spectrum, from a spate of efficient four-cylinders to the most powerful production V8 on the planet. As always, the entries must be available in a production vehicle in the first quarter of 2013 with an MSRP of less than $55,000. The supercharged 3.0-liter V6 from the Audi S5 held on for the fourth consecutive year, and BMW earned two spots on the list with its turbo 2.0-liter four-cylinder and turbo 3.0-liter inline-six.
Ford pulled in two awards for its 2.0-liter EcoBoost four-cylinder and and the supercharged 5.8-liter V8 from the Shelby GT500. Honda matched BMW and Ford with two wins of its own. Wards awarded the 2.4-liter four-cylinder from the Honda Accord Sport as well as the 3.5-liter V6 from the Honda Accord. Chrysler, General Motors and Subaru each garnered a spot on the list as well for the 3.6-liter V6 in the Ram 1500, the turbo 2.0-liter four-cylinder in the Cadillac ATS and the 2.0-liter four-cylinder the Subaru BRZ, respectively. You can read the full press release below for more information.