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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

Why Cadillac thinks it needs to succeed in Europe to sell cars elsewhere

Ward's Auto has taken an interesting look at the renewed focus General Motors is showing towards Cadillac in Europe. Susan Docherty, president and managing director of Chevrolet and Cadillac in Europe (pictured), says in order for the luxury brand to thrive in China, it first needs to succeed in the old country. The reason? Chinese buyers look to Europe for cues as to what's deemed worthy of the term "luxury." There are hurdles to the plan, however. In addition to the fact that the EU is flooded with high-end nameplates, GM doesn't necessarily have the distribution network in place to put buyers behind the wheel.
Combine that with persistent economic woes and Cadillac's checkered past marred by a lack of diesel engine options and a bankrupt distributor, and the road ahead for the brand looks like less of an uphill climb and more like a straight-up cliff face. But Docherty is optimistic and says she has a plan for the brand. We recommend heading over to Ward's for a closer look at the full read.

Expensive Cadillac ELR at least comes with free Level 2 home charger

"But wait, there's more!" Anyone who's watched late-night television is familiar with the telltale phrase of a spokesman looking to reel in a potential customer who may otherwise be disinterested in what's being advertised. Now, General Motors, faced with selling the first Cadillac extended-range plug-in vehicle to a public that may find it rather expensive, is throwing in a bonus. In this case, GM will give away a 240-volt home fast charger to "early" buyers of the Cadillac ELR, including professional installation. How early? Well, we're not finding that information in the press release below, so it may be a moving target. Earlier this month, GM said it would offer the ELR for a 39-month lease for $699 a month for qualified lessees. The deal requires $5,999 down and GM originally said it would only be good until the end of the month (though we assume that could change). It's also an "ultra-low-mileage" lease that allows for only 10,000 miles of driving each year, before per-mile surcharges of 25 cents kick in. Last fall, GM set the base price for the ELR at $75,000, before government incentives get factored in. Like its Chevy Volt sibling, the ELR can go about 340 miles using both the electricity in the battery and the gas-powered on-board generator. Check out our ELR First Drive here. Cadillac Enhances ELR Buying Experience Early adopters to receive complimentary home charger and installation DETROIT – Cadillac is offering a complimentary 240-volt home charging station and installation to early buyers of the all-new 2014 ELR electrified luxury coupe. "The ELR's blend of leading technology with provocative design and fun-to-drive performance is set to bring new buyers to Cadillac and to electrification itself," said Uwe Ellinghaus, chief marketing officer, Global Cadillac. "Professional installation of the fastest home-charging unit is a natural way to mark the introduction of ELR to the luxury market." Cadillac is offering the ELR on an ultra-low-mileage, 39-month lease for qualified lessees at $699 per month with $5,999 due at signing after all offers. The Cadillac ELR offers a convergence of luxury, electrification and sporty driving in a premium coupe with dynamic design and an award-winning range-extended electric powertrain capable of 340 miles of total range.