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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

GM earnings rise 1% as buyers pay more for popular pickups

DETROIT — General Motors said Thursday that higher prices for popular pickup trucks and SUVs helped overcome slowing global sales and profit rose by 1% in the second quarter. The Detroit automaker said it made $2.42 billion, or $1.66 per share, from April through June. Adjusting for restructuring costs, GM made $1.64 per share, blowing by analyst estimates of $1.44. Quarterly revenue fell 2% to $36.06 billion, but still beat estimates. Analysts polled by FactSet expected $35.97 billion. Global sales fell 6% to 1.94 million vehicles led by declines in North America and Asia Pacific, Middle East and Africa. The company says sales in China were weak, and it expects that to continue through the year. In the United States, customers paid an average of $41,461 for a GM vehicle during the quarter, an increase of 2.2%, as buyers went for loaded-out pickups and SUVs, according to the Edmunds.com auto pricing site. The U.S. is GM's most profitable market. Chief Financial Officer Dhivya Suryadevara said she expects the strong pricing to continue, especially as GM rolls out a diesel pickup and new heavy-duty trucks in the second half of the year. "We think the fundamentals do remain strong, especially in the truck market," she said, adding that strength in the overall economy and aging trucks now on the road should help keep the trend going. Light trucks accounted for 83.1% of GM's sales in the quarter, and pickup truck sales rose 8.5% as GM transitioned to new models of the Chevrolet Silverado and GMC Sierra, according to Edmunds, which provides content to The Associated Press. As usual, GM made most of its money in North America, reporting $3 billion in pretax earnings. International operations including China broke even, while the company spent $300 million on its GM Cruise automated vehicle unit. Its financial arm made $500 million in pretax income. Suryadevara said GM saw $700 million in savings during the quarter from restructuring actions announced late last year that included cutting about 8,000 white-collar workers through layoffs, buyouts and early retirements. The company also announced plans to close five North American factories, shedding another 6,000 jobs. About 3,000 factory workers in the U.S. whose jobs were eliminated at four plants will be placed at other factories, but they could have to relocate. GM expects the restructuring to generate $2 billion to $2.5 billion in annual cost savings by the end of this year.

Cadillac issues stop sale on ATS to recall 82k units

Cadillac is issuing a recall on 82,620 examples of the 2013-2016 ATS worldwide to fix a compliance issue with the sunroof controls. Until a service bulletin goes out to take care of things, there's also a stop sale on the luxury compact in the United States, The Detroit News reports. Of the affected models, 63,665 are in the US, according to a statement sent to Autoblog, and 7,922 of them are in Canada. The problem is actually the same issue as a recall on nearly 59,000 examples of the 2013-2015 ATS in the US in February. In them, the controls for the tilt and slide of the roof aren't recessed enough to meet government standards for the force necessary to operate the buttons. The Feds believe that someone could accidentally activate the auto-close and potentially be at risk. At the time, Cadillac dealers installed a new trim plate to add the needed clearance. In the latest update, the company is adding the 2016 model year, and according to The Detroit News, 70 percent of the cars from the original campaign also need another new trim plate. Unsurprisingly for such a minor defect, there are no known crashes, injuries, fatalities, or customer complaints related to this issue, according to the announcement by General Motors. Cadillac ATS Statement: General Motors is recalling 63,665 Cadillac ATS sedans in the United States from the 2013-2016 model years because the power-operated roof panel systems on these vehicles will auto-close when the non-recessed portion of the "Slide" or "Tilt" switches are pressed and the roof panel is open. Because these switches are not fully recessed, they can be actuated with less force than required to comply with applicable federal standards. GM knows of no crashes, injuries or fatalities related to this issue and has received no customer complaints. The total population of the recall including Canada, Mexico and exports is 82,620. Transport Canada Recall # 2015322 Recall Date 2015/07/21 Notification Type Compliance Mfr System Electrical Manufacturer Recall Number 15568 Units Affected The number of vehicles or components affected by the recall. 7,922 Category Car Recall Details Certain vehicles equipped with power-operated sunroof system may fail to conform to Canada Motor Vehicle Safety Standard (CMVSS) 118 - Power-Operated Window, Partition and Roof Panel Systems.