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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

Texas cops pull armed suspect from burning car

A high-speed chase through Fort Worth, Texas ended in dramatic fashion earlier this month when FWPD pulled armed burglary suspects from the burning wreckage of their escape vehicle. According to NBC DFW, Fort Worth police were dispatched to Avington Way on the evening of July 16 to investigate reports of a burglary. The burglary victim told police he had arrived home to find three individuals hauling his property out of his house. When he approached them, one of the suspects pointed a handgun at him and told him to stay back. Then all three suspects climbed into a silver Dodge Avenger and sped away. FWPD officers spotted the Avenger a short time later on Sycamore School Road and, after the car refused to pull over, the chase was on. Police chased the burglary suspects through the city at speeds approaching 100 mph until the Avenger blew a red light and was t-boned by an oncoming pickup at the intersection of California Parkway and James Avenue. As the pursuing officers closed in on the disabled car, it suddenly caught fire. One suspect bailed out and ran for it, but the remaining two were trapped inside with the flames quickly mounting. Despite the spreading fire and the threat of armed suspects in the vehicle, police officers rushed to pull the men from the wreck. The driver was removed easily, but the passenger was unconscious and trapped behind a crushed passenger door. The scene was caught on the officers' body cameras as they pried the door open with their bare hands. Eventually the officers got the semi-conscious man out of the passenger seat just as the car was completely engulfed in flames. "It was pretty dramatic. We recruit people that can think on the fly, think quickly, and perform under pressure," FWPD Sergeant Marc Povero told WFAA. All three suspects are facing charges for burglary, and the driver was charged with evading arrest. News Source: WFAA, NBC DFW Auto News Chevrolet Dodge Driving Safety Truck Police/Emergency Sedan fire car fire burglary

Buick takes top spot in 2022 J.D. Power Initial Quality Study

People, economies, and supply chains weren't the only things continuing to get sick over the past year. The 2022 J.D. Power Initial Quality Study (IQS) is out, showing the average rate of problems per 100 vehicles (PP100) during the first 90 days of ownership increased overall. The average figure for the 32 ranked manufacturers in 2020 was about 166 problems per 100 vehicles. In the 2021 IQS, that dropped to an average of 162. This year, the average jumps to 180 problems. J.D. Power says that figure is a record high over the 36-year history of the study. Buick leapt to the top of the rankings this year with the fewest issues, at 139 problems per 100 vehicles in the first 100 days of ownership. After Dodge became the first American automaker to lead the IQS in 2020, followed by Ram in 2021, this year marks a three-peat for U.S. carmakers. Dodge took second this year at 143 PP100, Chevrolet third with 147 PP100, Genesis the first luxury maker on the chart in fourth with 156 PP100. Between February and May, this year's study gathered responses to 223 questions from more than 84,000 new 2022-model-year car owners and lessees. The questions are designed to zero in on real-world problems new owners encounter with nine categories of vehicle features: Infotainment; features, controls and displays; exterior; driving assistance; interior; powertrain; seats; driving experience; and climate. As has been the case in the past few year, infotainment has proved to be the most problematic bugbear making scores worse. Considering features individually, six of 10 of the worst problem areas dealt with infotainment, causing infotainment's score of 45 PP100 to be 19.5 PP100 worse than the second-placed feature. Consumers ranked getting Android Auto and Apple CarPlay to connect reliably as the most troublesome.  GM didn't just score with Buick, which was one of only nine of the 33 ranked brands to show improvement this year. The conglomerate earned first place with the fewest PP100 among all the automaker groups, and scored the most model-level awards with nine, ahead of BMW with eight and Hyundai Group with three.  This year's study again showed a gap between luxury and mass-market makers, thought to be down to the amount of tech in luxury vehicles that consumers aren't properly informed about or that doesn't act as expected — that latter issue exacerbated by the chip shortage.