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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

2016 Chevy Malibu undercuts rivals with $22,500 starting price

Customers eager to get their hands on the new 2016 Malibu may be pleasantly surprised to find that Chevy has actually reduced the price on the base model. In fact the Malibu now undercuts much of the competition. Order up a new Malibu in entry-level L trim and you'll shell out only $22,500. That includes the $875 destination charge (which is $50 more than what Chevy used to charge for delivery). The Malibu L of course won't come with all the bells and whistles of the higher trim levels, but still comes with 10 airbags, cruise control, and push-button ignition. Compare that to the competition and you'll find the base Malibu less expensive than most, but not all. It undercuts the Ford Fusion, Honda Accord, Toyota Camry, and Nissan Altima – although the Hyundai Sonata and Mazda6, for example, are still marginally less expensive in base trim. Those looking for a little bit more can upgrade to the Malibu LS ($23,995), LT ($25,895), or Premier ($31,795). The L, LS and LT come with a 1.5-liter inline-four, but the Premier packs a 2.0-liter turbo that can also be had in LT spec for $29,495. Pricing for the Malibu Hybrid is slated to be announced at a later date, as will EPA fuel economy figures for the rest of the range. Next-Gen Chevrolet Malibu Starts at $22,500 Lower than Camry, Accord, Fusion and Altima 2015-09-10 DETROIT – The 2016 Chevrolet Malibu, the most fuel-efficient, connected and technologically advanced version in the nameplate's history – will be available with a starting suggested retail price of $22,500 for the L model. "We've continued our focus on delivering on the highest levels of quality, as evidenced by recent recognitions from J.D. Power on initial quality and long-term dependability," said Steve Majoros, director of Chevrolet cars and crossovers. "The 2016 Malibu is engineered and priced to give customers impressive value and technology that's hard to compete with." For 2016, Malibu will be offered in five models, L, LS, LT, Hybrid and Premier. Standard equipment includes 10 airbags, cruise control, push-button start with passive entry and fuel-saving stop/start technology on the base 1.5L 4-cylinder engine. The LS model, starting at $23,995, includes standard Chevrolet MyLink Radio with 7-inch diagonal color touch screen, available compatibility with Apple CarPlay and Android Auto and a rear vision camera. CarPlay and Android Auto are subject to Apple and Google privacy statements and require compatible smartphone and data plans.

Where the 2023 GMC Sierra AT4X fits into the hierarchy of off-road trucks

The world of off-road pickups sure seems like it's getting crowded, but the reality is that half-ton trucks were always pretty capable, even with what seemed like fairly basic 4x4 packages. It wasn't until recently that manufacturers really started to carve out different off-road niches for their mainstream pickup offerings. With the introduction of the 2022 GMC Sierra 1500 AT4X (alongside its mechanical twin, the Chevy Silverado ZR2), the crowd has grown even thicker. Even we have trouble keeping up with the increased segmentation of off-road pickup trucks, so we threw together this handy guide to help you understand just where these various packages fit into the broader pickup hierarchy. Let's dive in.  Your basics If we say "Z71" or "FX4" to you, both will probably ring a bell. That's because they've been around a few days short of forever and their respective customers have grown so used to these package codes that OEMs got into the habit of just plastering them on the side of so-equipped truck beds. Anybody who sells a pickup truck offers some sort of basic off-road prep package like this one. Z71 is found on GM vehicles; FX4 is Ford's. Ram just calls it "Off Road Group," but no matter what you call them, they're all pretty similar.  Typical upgrades for this category include some additional ground clearance, a basic all-terrain tire, heavy-duty suspension upgrades and likely either a limited-slip or locking rear differential. These are pretty handy for anything beyond a rutted dirt road. On newer trucks — especially on higher trim levels — you'll probably also get some dedicated off-road drive modes.  Mid-range This is where things start to get interesting. To qualify for this category, a locking rear differential is a must. Most of the names in this segment are well-established too, though some (Nissan Titan Pro-4X, anyone?) may not necessarily be on your radar. The Toyota Tundra TRD Pro checks in here, as does the Ram Rebel, Chevy Silverado Trail Boss and GMC Sierra AT4 (no X!).  Realistically, if there's somewhere you need to go and one of these trucks won't do it, you might want to consider a helicopter. But it's 2021, and our thirst for capability is strong, so of course, there's a way to spend more of your money on this type of thing. Onward! Entry-hardcore Here we are, the home of the new 2022 GMC Sierra AT4X and Chevrolet Silverado ZR2. This is a tiny niche, otherwise occupied only by the Ford F-150 Tremor.