2002 Cadillac Eldorado Etc Coupe 2-door 4.6l Convertible Coach Bilders 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

GM announces net 220 job increase as Trump visits Michigan

GM announced today that about 900 jobs would be added (or, importantly, retained) ahead of President Trump's arrival in Michigan, where he is expected to discuss his plan to roll back fuel economy standards. The timing of the announcement is almost certainly not coincidental, as appending it to a Trump visit gives it a higher profile and dovetails with the President's jobs agenda. It's less likely the decision itself was made for those reasons, but the free PR boost is a nice bonus. As for those 900 jobs themselves, they aren't all new jobs. The only net gain is approximately 220 jobs at the Romulus Powertrain Plant, which produces the 10-speed automatic transmission that's proliferating through the company's lineup. The 180 jobs at Flint Assembly and 500 jobs at Lansing Delta Township are retained jobs – that is to say, spots the company found for workers who would otherwise have been laid off. By the way, the Flint jobs will help with production of heavy-duty pickups, and the Lansing jobs are to produce the Chevrolet Traverse and Buick Enclave. Finding jobs for manufacturing workers in the auto sector, whether new or retained, is admirable. No matter how GM couches it, the company has created or retained a total of 7,000 jobs this year, and its total reinvestment in US production is around $1 billion. But these decisions are business ones, not political ones – timing the announcements to make them seem inspired by economic policy, or the political situation, is simply smart PR. Related Video: Image Credit: Bill Pugliano/Getty Images Celebrities Government/Legal Buick Cadillac Chevrolet GMC

Cadillac XT5 platform to underpin three-row crossover

Cadillac just launched the XT5 crossover to replace the SRX. But that's only the start. Speaking with Automotive News, Caddy president Johan de Nysschen confirmed that a new three-row crossover is also on the way. The seven-seater is based on a stretched version of the flexible platform underpinning the XT5, which we just drove recently. Taking that approach will give the luxury brand a larger crossover to pit against the likes of the Infiniti QX60, Audi Q7, and Volvo XC90 without having to develop one from scratch. It will also give buyers a more car-like alternative to the larger, truck-based Escalade. "It's one of the benefits of having this very flexible architecture. We can expand it, make it longer and wider. That gives us the ability to develop the car very quickly, as opposed to starting from scratch," de Nysschen told AN. "It's not running yet. It is a program request that we initiated with the engineers only last year. They are working at remarkable, record-breaking speed to get us the car." The new model would likely be called the XT7 and offer similar levels of equipment to the existing, smaller XT5. The existing mid-size model packs a 3.6-liter V6 mated to an eight-speed automatic transmission and comes in four trim levels. Related Video: