Read more about GM Patents New Two-Stage Turbo at AutoGuide.com. General Motors has filed a patent application for a new two-stage turbo system.
The filing, published by the USPTO on May 19, 2016
, details a two-stage turbocharger where the low pressure turbine and the high pressure turbine are arranged in a series. The brilliance of the new proposal is a bypass system that allows GM to optimize both the high-pressure and the low-pressure inlets for their respective tasks.
According to the filing, typical two-stage turbochargers are configured to operate both turbines simultaneously at low/mid engine speeds, while at high engine speeds, only the low-pressure turbine operates. The issue with this design is it can never completely isolate either the low or high pressure side, forcing inlet design compromises, which in turn can impair low end performance and result in higher pumping loses. GM’s new system proposes to eliminate the compromise.
The high-pressure turbo is linked to the exhaust
manifold through the high-pressure inlet duct; the low pressure turbo is connected to the high pressure turbo through a low pressure inlet duct, which links to a connecting channel.-
Bypass is created through a single actuator that lives in the exhaust manifold, it either opens the high-pressure inlet and closes the connecting channel or vice versa.
The system is actually pretty brilliant in its simplicity. The actuator takes direction from the ECU based on engine speed and load, the actuator is a single rotating spindle with discs corresponding to flanges
on the high and low pressure sides. The spindle rotates 90 degrees isolating the respective sides of the two-stage turbos.
Isolation allows the respective inlets to be designed for the best possible fluid dynamic performance. This way the maximum available enthalpy is given to the low pressure side in full power operation, likewise to the high pressure side in maximum torque operation.
Want to bet we see it in a Cadillac first?
Cadillac has picked up BMW’s old gameplan and is making fun-to-drive cars in almost all segments. The ATS is a great car for those looking for a premium driving experience, especially at its $34,210 price point, but an upgraded model with the new 3.6-liter V6 engine ups the ante. The Cadillac ATS is a prime example of how the American automaker is looking to the past for inspiration.
Cadillac’s sport sedan
is a reminder of a time when luxury cars could be fun and nimble rather than large and gadget-laden. It’s a throwback of sorts, specifically to the impressive BMW 3 Series from late ‘90s to early 2000s. Why would Cadillac look back to a 15-year-old BMW for inspiration? Because that generation of BMW helped give the brand legs. A loyal following of owners lived with their E46 3 Series sedans and then moved up into other, larger BMW vehicles
after becoming so smitten with the driving dynamics of the entry-level luxury vehicle.
Read more about the 2016 Cadillac ATS 3.6L Review at AutoGuide.com.
You never know which cars are going to be classics; the vehicles that turn up at car shows usually have a mix of sentiment and rarity.
Here are 10 future collector cars we think have potential to gather crowds at car shows of the future. The best part is that they aren’t terribly expensive right now.
Acura NSX (1st-gen)
It was known as “the Japanese Ferrari” — a phrase that still makes us throw up in our mouths a little — but the truth is that these cars really could go toe-to-toe with the best from Europe, and their baked-in Honda reliability gave them an distinct advantage. Drive a first-generation Acura NSX today and you’ll be amazed at how well this quarter-century-old design stacks up, even by modern day standards. The coming of the new NSX has stirred interest in the first-generation cars, but prices are still reasonable: Plenty are still trading in the mid-20s to low-40s, which is a bargain, considering what these cars can do.
Find an Acura NSX for sale here.
The CTS-V will be remembered as car that turned the phrase “performance-oriented Cadillac” from a bad joke into a serious threat. The first-generation (2004-2007) had naturally aspirated V8 engines from the Corvette Z06 (5.7 then 6.0 liters, both 400 hp) and came exclusively with a six-speed stick. These BMW-beating road warriors are the best bargains, with some nice ones changing hands under $15k and a few under $10K. 2009-2015 cars gained a supercharger and 556 horsepower, with drop-dead gorgeous coupes and wagons joining the lineup. These cars are quite a bit more expensive, but you can still nab a sedan for around $30k and coupes and wagons under $40k — not bad considering the all-new 2016 version sells for $83,995.
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Your car says a lot about you—but wheels that flash cost lots of cash. Or do they?
Buy smart, and you can find some serious baller cars at a serious discount. Here are ten used cars that we think are the bomb… at a price that won’t blow up your bank account.
10. Land Rover Range Rover
Drive through the Hollywood hills, and you’ll see Range Rover after Range Rover after Range Rover. This is the go-anywhere SUV that the “haves” simply have to have. Range Rovers can be troublesome as they age, so you’ll want to keep money set aside for repairs—but their reputation for being trouble-prone has driven prices into the basement.
You’ll find examples selling for one-quarter the cost of a new one, and high-mileage examples going for even less. Case in point: This twelve-year-old one-owner Range Rover HSE, with just under 100,000 miles on it. Asking price is $12,970—a mere 15% of the price of a new Range Rover.
Find more Range Rovers for sale here.
9. Chrysler 300C SRT8
The 300 as we know it made its debut in 2005, with a bold new design that quickly made it the car in which to be seen. Chrysler has restyled the 300 a few times since the first generation, but they have yet to duplicate the hardcore look of the original 2005-2007 cars.
V8-powered 300C models are easy to find under fifteen grand, but if you really want to do things right, go for the SRT8 version, which comes with the 425 hp 6.1 liter HEMI V8. We found this 2006 model being sold by a dealer in Louisiana. The car has a small rock chip in the windshield, but it’s also a two-owner car... [Read More]