2012 Cadillac Srx Premium Collection on 2040-cars

Auto blog

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

Car subscription services: A slow, expensive start — but the potential is huge

Americans are used to paying for subscriptions — to magazines and cable television, for instance — but experience shows they'll cancel when the price of admission gets too high, or there are more tempting alternatives. Cord cutters ditched nearly 1.5 million pay-TV subscriptions in 2017, according to a survey by Leichtman Research Group. Cable TV started out cheap with basic offerings, and then got expensive. The auto industry's subscription offerings are new, but they're starting out costly, and not price-competitive with traditional leasing. The upside is that they take the hassle out of car ownership for busy people by letting the service take care of maintenance, insurance, licensing and taxes. And they give consumers choice, often allowing relatively painless switches between different cars in the automakers' lineup. Subscription services also point the way toward an ownership-free auto experience, and offer an easy transition to a potential world where ride- and car-sharing will be dominant. Subscriptions are here to stay, but consumers may take a while to "get" them. Lincoln's subscription service for lightly used 2015 to 2017 models, offered through the Ford-owned Canvas beginning this year, got off to a slow start. Many early subscribers canceled. Last month, Cadillac announced it would " temporarily pause" its $1,800-per-month Book subscription service for "adjustments" as of December 1. According to the Wall Street Journal, "Snags with the back-end technology used to support the service made some customer-service functions tedious and time-consuming, adding costs for the company." The challenge for automakers is to come up with a strategy that offers consumers a compelling, affordable option to regular ownership, and one that can also make a profit. I think they'll find that sweet spot, but they're not there yet. Jack Nerad, former executive editorial director at Kelley Blue Book and author of " The Complete Idiot's Guide to Buying or Leasing a Car," points out that "A lot of people expected that subscriptions would be very valuable for people who wanted inexpensive transportation, but the reality is quite the opposite. Subscriptions are offering more choices for the wealthy.

Seinfeld and Don Rickles stretch out in classic Caddy for latest CiCGC

It's no surprise that for the newest episode of Jerry Seinfeld's Comedians in Cars Getting Coffee, airing for the first time on the 4th of July, that a couple of American classics are involved. You'll Never Play the Copa unites Seinfeld with legendary curmudgeon Don Rickles, driving around in a stunner of a 1958 Cadillac Eldorado Seville in Gleneagles Green (upholstery wrapped in Grandma-spec plastic, of course).
Mr. Rickles really steals the show in this one - maybe our favorite CiCGC to date - though the Eldorado plays a strong-jawed costarring role, for sure. Stories about Ronald Regan, Frank Sinatra, Billy Graham and, of course, Herkie Styles are more than worth the price of admission. Check it out below.