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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

Cadillac back on track with 600-hp ATS-V.R racer in FIA GT3 spec [w/video]

There was already a rumor brewing that Cadillac might eschew the CTS as its racecar next season in favor of the ATS Coupe. It turns out that is absolutely the case, and now we know just what this 600-horsepower, future racer looks like. The coupe might not be limited to competing in just the US, though, because it's built to FIA GT3-specifications, meaning that this Caddy is also eligible to race in over 30 series worldwide against the likes of Bentley, McLaren, Audi and other premium brands.
The heart of this massively winged Cadillac is an engine dubbed the LF4.R. It's based around the unit in the production ATS-V and CTS Vsport but with larger turbos, bigger intercoolers, side exhausts and other tricks. Cadillac claims it makes a monstrous 600 hp and 520 pound-feet of torque in unrestricted form.
As the photo above shows, the ATS-V.R also wears an aggressive aero kit with a carbon fiber front splitter, and a wing at the back that could probably double as a picnic table in a pinch. The dry weight of the whole package is quoted at about 2,900 pounds, which is around 700 pounds less than the street version.

Ford C-Max Commercial Brings Cadillac 'Poolside' Ad Down To Earth

If we had tried to predict the first video response to the controversial Poolside video for the Cadillac ELR, we would not have thought it would center on compost. But, hey, it's always nice to be reminded that the real world is sometimes better than fiction. Instead of the chic swagger of 'Poolside,' 'Anything Is Possible' is all about getting dirty. The new short in question is called Upside: Anything Is Possible and it promotes two things: Detroit Dirt and the Ford C-Max Energi. As in the ELR ad, Ford's plug-in C-Max only makes an appearance at the tail end of the spot, but instead of the chic swagger of Poolside, Anything Is Possible is all about getting dirty. The ad stars Pashon Murray, co-founder of Detroit Dirt, which takes natural waste from around Detroit, composts it into soil and then spreads that around "forgotten parcels" of Detroit to create urban farms. Detroit Dirt gets its bio-waste from a lot of sources, including the Detroit Zoological Society (all that herbivore manure has to go somewhere), Ford and General Motors, but this particular ad was the idea of Ford's PR agency, Team Detroit. It was a frenetic shoot, filmed with an LA-based director right after a big winter storm blew through Detroit, and Murray couldn't be happier with the result. "This was Ford Motor Company pushing my story, letting me tell the story that I believe in," Murray tells AutoblogGreen. "I get to help push this car and I get to tell my story." She says that the Team Detroit and Ford had to agree on the message, "from my understanding, [YouTube] is where they wanted to start, not where they wanted to finish." The ad is already getting a positive response on Twitter, so we won't be surprised if it shows up in more places soon. "It's not saying Ford is better than GM. It's telling the story of a black woman who's working hard in Detroit." As Detroit Dirt has off-screen support from both GM and Ford, it's unsurprising to hear Murray say that the video "is not a rivalry thing." She notes that the ad agency Team Detroit came to her and offered to tell the Detroit Dirt story using the framework of the GM ad. "It's a parody on this commercial, but it's not saying Ford is better than GM," she said. "It's telling the story of a black woman who's working hard in Detroit." What is that story? It's about urban farming, recovery and recycling. Murray tells us that for the last seven or eight years, she's been dedicated to sustainability.