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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

May 2016: FCA wins, Ford and GM stumble on weak car volumes

The May 2016 sales numbers are in, and it looks as though FCA is getting some vindication for boldly cancelling two slow-selling car models. Meanwhile, Ford saw overall sales dip and GM's May volume took a big dive versus the same month in 2015. While Marchionne's decision to axe the Chrysler 200 and Dodge Dart has drawn criticism as being short-sighted, it's working for FCA so far. Although the Dart and 200 aren't out of production yet and no capacity has been shifted to crossover or trucks, May's numbers show that the emphasis on Jeep and Ram models makes sense right now. FCA's US sales rose 1 percent last month compared to May 2015, putting the year-to-date total at 955,186 vehicles, an increase of 6 percent compared to the same period last year. Standouts included the Jeep Renegade, Compass, and Patriot, and the Fiat 500X. Ram pickup sales were down 3 percent. And your fun fact is that Alfa Romeo sales were up precisely 10 percent, for a total of 44 4Cs sold versus 40 in the same month last year. At FoMoCo, the Ford brand took a hit to the tune of 6.4 percent from May 2015 to 2016, registering 226,190 sales last month. Lincoln showed improvement on its modest numbers, going from 9,174 to 9,807, a 6.9 percent increase. Overall, Ford was down 5.9 percent for the month to 235,997; despite the slump, year-to-date total Ford sales are up 4.2 percent to 1,112,939. Strong sellers included Escape, Expedition, F-Series, and Transit - big stuff. Most small and/or efficient models (Fiesta, Focus, Fusion, C-Max) saw sales slides. Fusion sales were also down, likely due to effects of model changeover to the freshened 2017 model. Ford has promised four new crossovers and SUVs by 2020 and if things keep trending this way the company will be able to sell them, but things could change in the next four years. GM saw the worst of it for domestic brands. Retail and fleet sales were down for each of the four divisions, with the May 2016 total dropping 18 percent to 240,450 vehicles. GM's year-to-date sales are down 5.0 percent in 2016 to 1,183,705. Both the Sierra and Silverado were down significantly, and the majority of Chevy, Buick, GMC, and Cadillac nameplates saw sales decreases, with both small cars and larger utilities included. Not even big stuff could help GM this month, it seems. We'll have more on the rest of the industry's May sales as those figures trickle in.

GM's Oshawa plant may close after Camaro production moves

Most of the time, when vehicle production is moved from one assembly plant to another, it spells bad news for the former. While General Motors won't go so far as to say its Oshawa, Ontario factory, which is losing the Chevrolet Camaro to the Lansing Grand River plant, is in trouble, analysts seem to think the factory's days are numbered. Forecasts for the facility are far from positive. The loss of the Camaro this year, combined with GM's targeted shutdown of a single-shift assembly line responsible for the fleet-only Chevy Impala Limited and the Equinox crossover is a bad enough omen. But with AutoForecast Solutions CEO Joe McCabe telling The Detroit News that the plant's other two products, the Cadillac XTS and Buick Regal, aren't likely to stick around beyond 2017, things look decidedly grim at Oshawa. "There is a fairly strong chance that the plant could close," Jeff Schuster, senior VP of forecasting for LMC Automotive, told The Detroit News. That doesn't mean that Unifor, Canada's auto union, and the Canadian government are going to let the factory die without a fight. And with the latter chipping in $10 billion as part of GM's 2009 bailout, you might think it has a degree of leverage in the situation. A meeting between the government and the Detroit Three at the 2015 North American International Auto Show revealed that Oshawa is already a topic of conversation. "We made it very clear that we would like to see an indication on the future of Oshawa sooner, in particular because the timing is very challenging for our supply chain to be able to adjust to potentially future orders or changes, but also to know that there are going to be future opportunities at Oshawa," Ontario's Minister of Economic, Development, Employment and Infrastructure Brad Duguid told The Detroit News. "Bottom line: It's time they made a longer-term commitment here," Unifor President Jerry Dias said, echoing Duguid's statements. It's unclear if this sort of strong talk will be enough to save 3,300-plus employees, although based on the analysts' forecasts, we doubt it.