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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, Daimler execs take swipes at Tesla

Despite the financial ties between Daimler and Tesla Motors, at least one Mercedes exec thinks the electric automaker doesn't have a bright future. And over at Cadillac, the message is that Tesla doesn't pose a threat but offers the luxury arm of General Motors more of classroom experience. The Mercedes story runs like this. Mercedes-Benz USA president and CEO, Steve Cannon, said at the New York Auto Show last week that Tesla has "no network" and only offers "little shops that don't have service capacity." He also said: "Folks are buying a Tesla now because they're kind of cool, but if you're a Tesla buyer, you have to have multiple cars. With Mercedes, you have a whole network. You've got no worries. ... Tesla is great, but you've got plenty of well-established brands that mean luxury, like Porsche or Mercedes-Benz, and how long do you think we're going to wait and let Tesla be out there alone [selling premium electric cars]?" "Treehuggers do not buy new luxury cars" – Uwe Ellinghaus For Cadillac's global chief marketing officer, Uwe Ellinghaus, Tesla's EV success represents little other than "a great opportunity and a learning exercise for all of us, and will help us traditional manufacturers to think twice about electric mobility." He added that, "I am not afraid of Tesla. ... There is no willingness to really sacrifice on the traditional qualities of a luxury car. These are not cars for treehuggers, as treehuggers do not buy new luxury cars." Ellinghaus made the comments during a panel discussion at the 2014 Automotive Forum. Perhaps the lesson of Tesla's offer of free Supercharging to Model S owners is what led to Cadillac to recently announce a deal with Chargepoint that gives ELR drivers access to that company's 16,500 charging stations. Read more details on that below. Cadillac and ChargePoint Bring EV Customer Luxury Driving Experience World's largest, most open electric vehicle charging network available to ELR drivers 2014-04-16 NEW YORK – Cadillac today announced a partnership with ChargePoint, the largest and most open electric vehicle-charging network in the world. The collaboration brings Cadillac ELR drivers immediate access to more than 16,500 charging locations on the ChargePoint network. The ELR electrified luxury coupe went on sale at the end of 2013. It embodies Cadillac's Art & Science design philosophy, combining provocative design with progressive technology.

Combative de Nysschen defends Cadillac move, naming change

Johan de Nysschen isn't afraid of taking quick, decisive actions, even if they are criticized. Since taking the wheel at Cadillac, he instigated moving the luxury division's base of operations to Manhattan's SoHo neighborhood and introduced a new naming scheme for the future of the brand, like he did at Infiniti. The polarizing boss recently explained his feelings about the future of Cadillac in more depth on his Facebook page, but unfortunately only his friends could read it. Thankfully, Daily Kanban posted much of the strongly worded missive for the whole world to see.
Much of the message examines the decision to move some employees to New York. De Nysschen claims that it's all about giving Cadillac distance from Detroit to reshape itself. It allows for, "No distractions. No side shows. No cross-brand corporate considerations. No homogenized lowest common denominator approach. Just pure, unadulterated, CLASS."