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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

2017 Cadillac CTS-V Drivers' Notes | V is for velocity

The 2017 Cadillac CTS-V is as close to a four-door Corvette Z06 as you're ever likely to get. Underneath the carbon-fiber hood rests one hell of an engine, a 640-horsepower supercharged V8. It's only slightly less powerful than what you'll find in the Corvette. Thanks to GM's chassis wizards, the car's handling is an equal match for the powerful engine. This particular car packs in a number of options, including Recaro seats and the performance data recorder that allows owners to measure lap times and record video. The most expensive option is the $6,950 Carbon Black Package. This nets you a carbon fiber hood vent, front splitter, spoiler and rear diffuser. This car isn't cheap, but it does undercut the less powerful Audi RS7 and Mercedes-AMG E63 S. Associate Editor Joel Stocksdale: This is a seriously fun, if also flawed, car. And the biggest contributor to the fun is the big lump of V8 under the hood. The supercharged 6.2-liter makes 640 horsepower, but Cadillac could've left the number off and just called it "effortless." The gentlest pressure on the gas pedal will result in you picking up an extra 10 mph without ever noticing. And when you stomp on it, you get this huge and immediate surge of acceleration. It's truly giggle-inducing. Although the CTS-V is big and heavy, it handles the power well. It gives you enough info on what's happening so you feel in control, and the chassis is impressively composed. The only real weak points I can find on the CTS-V (besides the low gas mileage) are the interior controls. They are abysmal. The infotainment screen is pretty poor, with a clutter of information at the main screen, and difficult-to-find commands for getting to other menus. But worse than that are the climate and volume buttons. They're all touch-sensitive spots on the center stack. They're not very responsive, and the vibratory feedback it provides isn't noticeable while driving. It doesn't help that the feedback feels pretty inconsistent, too. For me, I think I could learn to live with the infotainment, simply because I love the way the rest of the car feels and drives. But, Cadillac, you need to get to updating this ASAP. Associate Editor Reese Counts: OK, Cadillac's infotainment system sucks. Let's get that out of the way. Touch capacitive interfaces don't work well in cars. This does have the old version of CUE, so I'm hoping the next-gen system will fix some of the interface issues. Like Joel, this wouldn't turn me off from buying the car.

Seventies super-salesman challenges new car-sales record

Some of the fondest memories from my youth were the Sunday afternoons spent walking between rows of new and used cars. This preceded the advent of widely available internet, so the cars didn't sell themselves online: A tentative buyer had to come see the cars in the metal, with old-school salesmen taking well-earned smoke breaks after putting someone behind the wheel of a new Saab 900. All-inclusive subscription services were unheard of. If you open a Guinness records book and look up car salesmen, you'll find Joe Girard. The definitely old-school Detroit salesman regularly sold over 1,000 new cars per year, with a particular high point of 1,425 cars in 1973 guaranteeing him a mention in the Guinness book. To reach that kind of sales figure, you had to be a pretty special salesman, and Girard was. He didn't take breaks unless absolutely necessary, and even his lunch hours were dedicated to selling more cars instead of shooting the breeze with other sales persons. By 1977 he was worn through, having sold over 13,000 cars in his career, and his physique couldn't take it anymore. He's been a motivational speaker since. Now, 44 years later, a Dearborn, Mich., Cadillac and Chevrolet salesman named Ali Reda has reportedly broken Girard's record. The books at Les Stanford Chevrolet Cadillac say Reda sold 1,530 new cars and 52 used cars in 2017, averaging 130 vehicles per month. But after Girard, 89, heard of the sales record, he called his attorney, not letting his record be broken without a fight — or at least an audit. The Dearborn dealer isn't too concerned about Girard's doubts, at least according to Gary Stanford, whose father founded the dealership. "It's very official, trust me," said Stanford to the Detroit Free Press. "Ali is the hardest worker I've ever seen. And if someone doesn't believe the data, well, they're more than welcome to consult with GM. It's all there in black and white." What Girard doesn't get is that Reda was honoring him with the accomplishment. "I read his book, 'How to Sell Anything to Anybody,' and it said it would teach you how to become the best," said Reda, who at age 44 was a newborn when Girard hit his peak. "He's an absolute legend in the industry. Your whole career, you're chasing his name.