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GM seeks national mandate for zero-emissions cars

DETROIT — General Motors says it will ask the federal government for one national gas mileage standard, including a requirement that a percentage of auto companies' sales be zero-emissions vehicles. Mark Reuss, GM's executive vice president of product development, said the company will propose that a certain percentage of nationwide sales be made up of vehicles that run on electricity or hydrogen fuel cells. GM says a nationwide program modeled on such a requirement in California could result in 7 million electric vehicles, or EVs, on U.S. roads by 2030. California wants 15.4 percent of vehicle sales by 2025 to be EVs or other zero emission vehicles. Nine other states, including Maryland, Massachusetts, New Jersey and New York, have adopted those requirements. In January, California Governor Jerry Brown set a target of 5 million zero-emission vehicles in California by 2030. The Trump administration criticizes California's ZEV mandate, saying it requires automakers to spend tens of billions of dollars developing vehicles that most consumers do not want, only to sell them at a loss. Reuss told reporters that governments and industries in Asia and Europe "are working together to enact policies now to hasten the shift to an all-electric future. It's very simple: America has the opportunity to lead in the technologies of the future." A national mandate also would create jobs and reduce fuel consumption, CO2 emissions and "make EVs more affordable," Reuss added. GM, the nation's largest automaker, will spell out the request Friday in written comments on a Trump administration proposal to roll back Obama-era fuel economy and emissions standards, freezing them at 2020 levels instead of gradually making them tougher. Under a regulation finalized by the Environmental Protection Agency at the end of the Obama administration, the fleet of new automobiles would have to get 36 miles per gallon by 2025, 10 mpg higher than the current requirement. But the Trump administration's preferred plan is to freeze the standards starting in 2021. Administration officials say waiving the tougher fuel efficiency requirements would make vehicles more affordable, which would get safer cars into consumer hands more quickly. GM on Thursday said it doesn't support the freeze, but wants flexibility to deal with consumers' shift from cars to less-efficient SUVs and trucks.

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

2020 Lincoln Corsair vs 2020 Cadillac XT4 | How they compare on paper

The 2020 Lincoln Corsair compact crossover was introduced this year to replace the aging MKC. Our first impressions are that it's a thoroughly competent luxury machine, but where it fits in the market is interesting. Given its size and price tag, the Corsair basically slots in-between compact segments, with vehicles like the Audi Q3 below and Audi Q5 above. It's a distinctive position to be in, but not a unique one, as there's another comparably sized and priced SUV -- and an American rival, no less. The Cadillac XT4 was launched just last year to be its company's smallest crossover, boasting compelling design and ample technology features.  So which is better? To give you some idea, let's take a look at each vehicle's horsepower, torque, fuel economy, space, pricing and some slightly more subjective aspects about their luxuriousness and feature sets. You'll find all the nitty gritty numbers below, followed by more detailed analysis. And if you'd like to compare other luxury crossovers, be sure to check out our comparison tool. Engines, drivetrains and driving impressions Both the Corsair and XT4 come standard with turbocharged 2.0-liter four-cylinder engines, but the Corsair's is more potent with 250 horsepower and 275 pound-feet compared with the 237 horsepower and 258 pound-feet of the Cadillac. And to seal the deal, the Corsair has an optional turbo 2.3-liter engine with 280 horsepower and 310 pound-feet of torque. That's not only vastly better than the Cadillac, but one of the most powerful outputs in the compact luxury SUV segment. Both vehicles have standard front-wheel drive with optional all-wheel drive on the base engines. The 2.3-liter Corsair has all-wheel drive standard. The Cadillac does boast an extra cog in its transmission over the Corsair's eight-speed automatic, but there's not necessarily an advantage or disadvantage to be gleaned from that. When it coes to fuel economy, the Cadillac is victorious with a 26 mpg combined rating for the front-drive model, with the front-drive 2.0-liter Corsair coming just behind with 25 mpg combined. It's a three-way tie for third with the all-wheel-drive XT4, all-wheel-drive 2.0-liter Corsair and 2.3-liter Corsair all returning 24 mpg combined. Of course, the all-wheel-drive Corsairs have a small advantage here in that it delivers more power and torque than the Cadillac with the same fuel economy.