2012 Cadillac Cts Base 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

Spy photos show Trump's new Cadillac-badged rolling fortress

Development on the new presidential limo, oh-so appropriately nicknamed The Beast, is moving along at a GM proving ground. We got a brief glimpse of the Cadillac-badged rolling testament to safety and security late in February thanks to some clever drone work. We now have a new batch of ground-level photos that show the limo cruising around, presumably being put through the vehicle equivalent of boot camp. Currently, President Trump is making do with the first-generation Beast. While still likely safer than anything else on the road, it's starting to be a bit dated. In addition to the updated styling that makes it look like a comically oversized Cadillac CT6, The Beast v2.0 is likely packing a whole new suite of technology and safety equipment. That's just an assumption, as there's no press release with a full list of features. We can't imagine that the government would want everyone knowing what's beneath The Beast's skin. Expect Trump's ride to have reinforced doors, extra-thick glass, and even a filtration system that would protect against a biological attack. There's speculation that it's equipped with tear-gas cannons, similar to one of James Bond's rides. Even the relatively normal-looking tires are likely to be strengthened in some way, allowing them to still roll if punctured. Add up all of the extra reinforcement, and the truck-based ride is likely to have a mass that's equivalent to a small moon. All that tech doesn't come cheap. Expect The Beast to cost taxpayers somewhere around $1.5 million. Hey, it's still less than the new Bugatti Chiron. Related Video: Featured Gallery The Beast 2.0 spy shots View 10 Photos Image Credit: KGP Photography Spy Photos Cadillac GM Trump limousine limo president

GM recalling Cadillac ATS, XTS, Chevy Impala over faulty brake lamps

General Motors has issued a recall covering 1,627 sedans over faulty brake lamps. Both the 2013 Cadillac ATS and XTS are affected by this problem, as is the 2014 Chevrolet Impala.
According to an official National Highway Traffic Safety Administration report, "the brake lamps may intermittently flash without the brakes being applied and the cruise control may disengage" on these vehicles. The report does not state that the brakes themselves are faulty, but rather that "if the brake lamps flash when the vehicle is not slowing, a following driver may not adjust vehicle speed when the vehicle is in fact braking."
This marks the first recall for the 2013 Cadillac ATS, as well as the recently introduced 2014 Chevy Impala. In late 2012, over 12,000 Cadillac XTS models were recalled due to a head restraint issue.