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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

How Cadillac improved power output in 2016 ELR by 25 percent

Earlier this year, Cadillac announced that the 2016 ELR would come with a big price drop and a powertrain that packs 25 percent more power output. That's a lot more oomph, but it didn't sound like the Caddy engineers made any major changes to the engine or motors. So, what happened? Let's refresh our memories with the numeric details. The 2016 car is 1.5 seconds quicker to 60 miles per hour than the 2014 model (there was no 2015), down to 6.4 seconds. The 2014 put out 295 pound-feet of torque. For 2016, it will be 373 lb-ft. The specific breakdown of the various components in the powertrain has not been disclosed, but from what we can tell, the two electric motors and the 1.4-liter inline-four engine in the new ELR are not that much different than those in the old one. Sam Abuelsamid, senior research analyst at Navigant Research (and former writer here at Autoblog) said that any of the unspecified upgrades would be difficult to tell on a part-by-part basis, but the overall effect will be noticeable. "The changes to the ELR as I understand them are analogous to getting more performance out of a 1965 Mustang with the entry version of the 289 cubic-inch V8. You can replace the carburetor with a larger version that enables more air and fuel to flow into the engine, thus producing more power. The basic engine hasn't changed, but power capability is being unleashed by feeding it more." "Cadillac has changed components in the power electronics to enable more current flow into the motor and thus produce more torque. When you do this in the Mustang, you probably need to replace the rear axle gears and use a beefier clutch to transmit the power to the wheels. Similarly, the ELR probably has some upgraded clutches, bearings, and gears to withstand the increased total output." Cadillac spokesperson David Caldwell told AutoblogGreen in an email that the new ELR does indeed have more than just new lines of code. "One could not 'reflash' a previous ELR to get the performance of a 2016," Caldwell said. "If one only changed software you would not get the performance upgrade fully, as the 2016 creates higher current, more power. So these have been upgraded physically – hardware.

More than 100 pink Cadillacs assemble for Aretha Franklin’s funeral today

Aretha Franklin's funeral service is under way today in Detroit, and plans call for a service of at least five hours featuring performances by stars including Stevie Wonder, Ariana Grande and Chaka Khan, speakers including former President Bill Clinton and the Rev. Al Sharpton, and at least 130 pink Cadillacs lining the road in front of the church. The gesture is a nod to Franklin's Grammy award-winning 1985 hit "Freeway of Love" and its lyrics about driving in a pink Cadillac. Crisette Ellis, the wife of Bishop Charles Ellis III of Detroit's Greater Grace Temple, said they were inspired by how police line up their cars during funerals for fallen officers. "My husband said, 'Wouldn't it be awesome if we could have a sea of pink Cadillacs parked on Seven Mile Road to greet Ms. Aretha Franklin as she arrives?'" she told NPR. Only in #Detroit. 130 pink Cadillacs drive in front of Greater Grace Temple ahead of #ArethaFranklin funeral. pic.twitter.com/qTTJtDXNvS— ROOP RAJ (@rooprajfox2) August 31, 2018 Ellis is an independent national sales director for Mary Kay Cosmetics, which famously rewards top sellers with pink Cadillacs, so she had a built-in base of people to call on for the favor. "They're coming from everywhere," she said. "They are coming from as far as Texas; Omaha, Nebraska; Florida; North Carolina; Maryland." The funeral, which officially kicked off at 10 a.m. EST at Greater Grace, caps a weeklong celebration of Franklin's life and songs, including a two-day visitation at the Charles H. Wright Museum of African American History and concerts. Performers also include Faith Hill, Jennifer Hudson and the Clark Sisters, while Tyler Perry and the Rev. Jesse Jackson are also scheduled to speak. HLN and the Word Network, plus several local Detroit television affiliates, plan to broadcast the funeral, and outlets including The Associated Press and USA Today plan to livestream it. Having sung at the inaugurations of three presidents — Jimmy Carter, Bill Clinton and Barack Obama — Franklin was an American institution. She was awarded the Presidential Medal of Freedom by then President George W. Bush in 2005. Clinton entered the church with his wife, Hillary, to loud applause and stood quietly by Franklin's open casket before the service started. Franklin's body was dressed in a golden sequined outfit. The funeral was closed to the public, but crowds of fans gathered outside, many dressed in their church best.