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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

New Toyota Tacoma, Ranger, Colorado/Canyon fight for midsize truck dominance

Sam Wedll has been driving his Toyota Tacoma pickup on the rugged roads of Northern California for seven trouble-free years, racking up almost 100,000 miles, so he’s interested in the redesigned version of the truck coming later this year. He paid $34,000 for his truck in 2016, loading it with plenty of options. HeÂ’s eyeing the new gas-electric hybrid Toyota Motor Corp. is going to offer, but Wedll, who does his own repairs, isnÂ’t interested in paying luxury prices. “The hybrid is pretty interesting to me because I like the idea of the fuel efficiency,” says Wedll, 47, a casino operations manager in Blue Lake, California. “IÂ’m just trying to save some costs wherever possible.” The Tacoma, known as the Taco to its legions of loyalists, is the leader of the pack in midsize pickups, one of the fastest-growing auto markets of the past decade. With outdoorsy weekend warriors and do-it-yourselfers looking for a truck that could fit in their garage, sales of midsize pickups more than doubled from 2010 to 2020. General Motors Co. and Ford Motor Co., which abandoned the market segment when sales slowed early this century, returned with new trucks to take on the Tacoma, which has dominated the medium truck market for almost two decades. Although it's easy to predict that the most lushly appointed versions of the new Taco could approach $50,000 (prices wonÂ’t be announced until later this year), Toyota insists it isnÂ’t backing away from budget buyers even as it rolls out fancier trucks. The current Tacoma starts at $28,030, and the company says affordability is critical to its success. In fact, Toyota will continue to offer the Taco with an old-school stick shift. The Tacoma controls 42% of the midsize truck market and outsells FordÂ’s offering 4 to 1. ThatÂ’s a role reversal from the full-size pickup market, where FordÂ’s F-Series has ruled the road for 46 years. Tacoma sales in the U.S. surpassed 237,000 last year, more than twice the number of GMÂ’s No. 2-ranked Chevrolet Colorado, according to consultant LMC Automotive. But as growth in the overall segment slows, the midsize market is developing into more of a turf war, with manufacturers vying for the sweetest highest-margin spots. “This segment is likely past its prime growth spurt,” says Jeff Schuster, president of the Americas for LMC Automotive.

GM says safety is a reason it's dropping Apple CarPlay, Android Auto

Update: GM sent us a statement as a follow-up to its original comments seen in this post: "We wanted to reach out to clarify that comments about GM's position on phone projection were misrepresented in previous articles and to reinforce our valued partnerships with Apple and Google and each company’s commitment to driver safety. GM's embedded infotainment strategy is driven by the benefits of having a system that allows for greater integration with the larger GM ecosystem and vehicles." The original story can be read in its entirety below.   General Motors announced its intention to remove Apple CarPlay and Android Auto functionality from its upcoming EVs earlier this year, and internet comments sections haven't been kind since. As the first of many EVs to follow – the 2024 Chevrolet Blazer EV – hits the market, GM is expanding on its initial explanations for dropping the tech. Motor Trend spoke with Tim Babbit, GMÂ’s head of product for infotainment, to learn more. Attributed to Babbit, from the story: “They have stability issues that manifest themselves as bad connections, poor rendering, slow responses, and dropped connections. And when CarPlay and Android Auto have issues, drivers pick up their phones again, taking their eyes off the road and totally defeating the purpose of these phone-mirroring programs. Solving those issues can sometimes be beyond the control of the automaker.” Babbit suggests that a world without Apple CarPlay or Android Auto will be a safer one, as folks wonÂ’t be looking to control their infotainment systems via their phones. However, Babbit also tells MT that this theory hasnÂ’t been tested in either the lab or the real world yet. Instead of using a navigation or music-playing app powered through your phone, upcoming GM EVs will use a Google-based infotainment system called “Ultifi” that runs a ton of integrated Google apps. Google Maps will be the native navigation app in the system; youÂ’ll be able to log in to Spotify or other apps to load your music up, and so on. The idea here is that youÂ’ll have all the same apps that were on your phone available but integrated within the infotainment system instead, and you'll be able to use voice controls to control every last bit of it with no need to reach for a phone. That sounds amenable in theory, but how consumers react to the removal of a feature that they know and love now is a risky gamble.