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VW engine will be the first 4-cylinder in the industry to use cylinder deactivation tech

With more stringent fuel economy standards looming in the U.S. and elsewhere, auto manufacturers are looking to pull out all the stops to improve economy as much as possible. Carmakers are turning to technology like direct injection and automatic start/stop. Several automakers are also using cylinder deactivation on their larger engines.

Cylinder deactivation is something that some carmakers in the U.S. and abroad have used for years. Chrysler has used the technology in its Hemi engines, Honda uses it on some of its V6 models, and Audi will use cylinder deactivation in its new line of “S” performance models.

VW is set to make a first in the automotive market by offering cylinder deactivation on its 4-cylinder models.

The VW tech will turn off two engine cylinders under certain conditions. The engine is called the 1.4L TSI and VW promises that it will offer a fuel savings of 0.4-liters/100km and when combined with start/stop technology the vehicle would save 0.6-liters of fuel. For those more familiar with U.S. mpg ratings, that works out to an improvement of in the range of 
3 to 4.5 mpg on average. 

The engine would turn off two of the cylinders under low to medium loads, and VW says that the tech will meet the future European EU6 emissions standards. The cylinders will be deactivated when the engine is operating between 1,400 and 4,000 rpm and the engine torque is in the range of 25 to 75Nm.

VW claims that operating range applies to about 70 percent of the driving distance in the EU fuel economy driving cycle. VW also points out that as soon as the driver presses the pedal the cylinders will reactivate without the driver being able to tell it happened. The cylinders also would not turn off if the vehicle were being driven in a sporty manner apparently. 

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RE: Really!?
By MonkeyPaw on 9/6/2011 6:33:34 PM , Rating: 2
My concern is reliability. I know some folks who own VWs, and they have issues already. Granted, it's the notorious Beetle, but....

RE: Really!?
By Spuke on 9/7/2011 12:10:45 AM , Rating: 2
My concern is reliability. I know some folks who own VWs, and they have issues already. Granted, it's the notorious Beetle, but....
The only marque lower than VW is Kia on JD Powers long term reliability. Is JD 100%? Who knows. But I doubt they would be that much higher.

RE: Really!?
By lagomorpha on 9/8/2011 8:45:23 AM , Rating: 2

You forgot about Chrysler/Dodge/Jeep, Land Rover and Mini.

The JD Power survey only took the number of problems per 100 vehicles. It could be a burnt out window motor or a blown engine and it was counted the same. German cars, especially VW, do have the reputation of having electrical components that will break constantly but engines and transmissions that will be working for decades. Then there's the issue that Beetles were made in Mexico and showed much less reliability than VWs made in Wolfsburg or Pennsylvania.

RE: Really!?
By YashBudini on 9/8/2011 9:24:32 PM , Rating: 2
Looking at the graphs, which don't expand shame on you JDP, we see BMW and Mini made by BMW far down the list. For what they charge there's simply no excuse.

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