1952 Cadillac Fleetwood 60 Special on 2040-cars

Auto blog

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 prepares to top its own 'Ring record with upcoming new CTS-V

It was a big deal back in 2008 when the original Cadillac CTS-V clocked a lap time of 7:59 at the Nürburgring, making it the fastest sedan ever to lap the Nordschleife to that date. Not many four-doors have bested that time since - the list consisting pretty much only of the Porsche Panamera Turbo - but now hot hatches are lapping faster than that, so you can bet that the new one will manage an even better time.
Now we've spotted the upcoming new CTS-based performance sedan several times before undergoing testing in locations around the world, but this is the first time we've seen it at the Nürburgring, apparently using the Goodyear Dunlop test facility as its base of operations (and still wearing Michigan manufacturer plates, incidentally). Considering how well the outgoing CTS-V performed and how much further you can bet Cadillac will push the envelop this time around, a new sedan lap record is almost a certainty - and we can only hope for an all-out war between Europe's performance sedan power houses to ensue.

Cadillac ad boss is happy controversial Poolside TV ad created debate

Remember Cadillac's controversial commercial for it ELR plug-in hybrid? Did you find it provocative? If so, that's a good thing according to the brand's advertising director, Craig Bierley. First aired during NBC's coverage of the Olympic opening ceremony, the minute-long spot returned to the tele again this weekend, bookending the Academy Awards on ABC. Titled Poolside, the bit was meant as "brand provocation" and whether you enjoyed it or not – sentiment is said to run 3:1 on the pro side – we can probably all agree it fulfilled its role as such. If you were one of those who felt the ad erred on the side of nationalistic consumerism (or what have you), your anger might be somewhat assuaged after reading this article from Advertising Age in which Bierley addresses most of what he believes are misconceptions about the message. For one, the spot isn't aimed at the One Percent, just those who make $200,000 a year. Or, as Craig Bierley, Cadillac's advertising director, calls them, "people who haven't been given anything." Bierley told Advertising Age that the spot doesn't celebrate workaholicsm, instead, "We're not making a statement saying, 'We want people to work hard.' What we're saying is that hard work has its payoffs.'" While our commentors seemed mostly to enjoy discussing the value proposition that is (or is not, depending on your point of view) the Cadillac ELR, the majority appeared to enjoy the commercial. If you were one of those offended, however, let us know if your opinion has changed upon reading Cadillac's defense. If you don't remember what all the fuss was about, scroll below to take another dip in Poolside.