Volkswagen ACT - Active cylinder management
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- čas přidán 29. 06. 2012
- The valves are closed using a complex set of actuators: on both the intake camshaft and the exhaust camshaft, there are two adjustable sleeves known as cam pieces that are placed on special tooth systems.
- Auta a dopravní prostředky
So guys it has been almost 10 years since this video is posted. Let's hear from people if they saved on gas or just had trouble with the engines.
I have been using it for 5 years, no issues with this engine. over 100K km with the car (1.4 tsi act). Act really helps with the fuel consumption.
Also 5 years, almost 6, no problems, but only about 30.000 miles (46.000 km) - 1.4 TSI.
1.4 tfsi audi a3 (same engine) absolutely no issues, great fuel consumption. Amazing engine that can handle good load of boost
I am sure you'll find very soon cylinder 1 and 4 rebuild Kits sold everywhere!
Haha lol
Will you though?
The switching is perceptible to the driver. Especially when the engine is cold.
This is good news! Germany cars forever and the good thing is it can stay on for 130 km/h
Combustion chamber 1 and 4 work under higher loads does that mean extra wear for most city drivers
One of the conditions for deactivation is that the LOAD is less than 100 Nm. When the load is big enough, all 4 cylinders will work. It will only deactivate 2 cylinders when the load is really low, for ex. when you are barely touching the acceleration pedal.
czcams.com/video/DJ4eLGVLXXw/video.html - much more details about this technology.
Open oil cap and check the wear of the contact between the ACT driver and the camshaft.😅
Won't the deactivated cylinders become dead weight on the driveshaft and increase the load on the other two active cylinders? Just curious.
Acts as an air spring almost
Inlet valves are getting a lot of carbon deposits require regular cleaning
Won't this cause a vacuüm on cilinder 2&3? And compression will still occur on cil 2&3 when they are shut down?
Project Funcar there will be no pressure on 2&3 cuz the values will be always opened n the computer will cut the fuel
@@zakigharbi5338
1:57
The valves stay closed, dumb ass!
Two of the four cylinders bear a larger amount of wear due to the fact that those cylinders are always working while the remaining two cylinders are deactivated for a certain period of time. The deactivated cylinders are cold and, when activated (requiring more torque), have increased wear. So the total wear of this engine is greater than one that does not have this system. The problem, however, is what to do with the oil that enters the deactivated cylinders (the piston rings act as an oil pump). The oil inlet is also augmented by the fact that after a few seconds, the air inside the cylinder due to its leakage from the piston rings will cease to act as a spring, as in the cylinder will be vacuum during piston descent. How are these problems handled by Volkswagen, or they are not so important that they do not significantly affect the operation and lifespan?
what do you think of this system ? i hate VW for not letting the driver deacitivate this option
Such a satisfying driving experience with the VWs I have had. My brain accepts that Toyota nails every process difficulty quickly due to their management style geared to reliability but they are sooooooo boooooriiinnnng.
I strip away the old debris
That hides a shining car
A brilliant Red Barchetta
From a better vanished time
We'll fire up the willing engine
Responding with a roar
Tires spitting gravel
I commit my weekly crime...
Firstly, cylinders 2 and 3 are still reciprocating at exactly the same rate as 1 and 4, the only difference is they're not producing combustion so they still "wear" at the same rate. Heat transfer from cylinders 1 and 4 and also water and oil circulation will still keep cylinders 2 and 3 at almost identical temperatures to 1 and 4. The heat loss from deactivation is so small its imperceptible. Secondly, pistons have an oil control ring to prevent cylinder lubrication oil leaking into the combustion chamber. The deactivated cylinders still require lubrication.
@@djfld2394 very good explanation 👍
@@djfld2394 and also even when deactivated the exhaust valves for deactivatedcylinders is still open making it to inlet exhaust gases in to the cylinder and exhausting it again keeping the cylinder walls and head warm
what if they put that technology on sportscar and supercar...power and efficiency..
topirok then it won't be a sport car
@@zakigharbi5338 cylinder technology car 🤣
ACT works just fine in our 2019 Golf. All in all Golf is still the best car in its class. If it doesn't satisfy you, just buy an Audi. That simple.
Piston still has to work,still wear and tear..wat about the vacuum created in the deactivated cylinders???for saving few drops of fuel,the maintenance cost will be higher than the fuel saved cost!!!
czcams.com/video/DJ4eLGVLXXw/video.html
Such a complicated thing just to safe 0.4l of gasoline... That money will hardly be returned ti the customer. And it's quite doubtful it will be returned to nature as well because cars will get scraped sooner.
Always junk
Over engineering at best