Anti-Lag süsteem

[Ragnar]

Huvitab mind siis see mida endast täpselt kujutab anti-lag süsteem ? Olen ma õigesti aru saanud, et väljalaske kollektorisse aetakse mingi valemiga bensu ja siis temperatuuri tagajärjel plahvatad kollektoris ja aitab turbo spoolimisele kaasa ? Kuidas süsteem täpselt töötab ?

[Miq]

***
edit:
kaks järjestikust, nagu ma nad leidsin..

ALS is an interesting system.

Basically it takes the exaust valve of the engine and retards it, dumping raw fuel into teh exaust manifold, as it hits the hot manifold around the turbo, the fuel ignites, basically turning your exaust manifold into a combustion chamber to keep the turbo spooled and creating boost when the driver lifts. Or to creat boost when the car is at idle. WRC cars make around 6psi of boost at idle. So thats what ALS is in a nut shell.

The draw backs of it are EXTREME heat. The manifold usually needs to be heat treated, and ceramic coated. And your turbo should have a ceramic impeller, and ball bearings. If you dont have all of these, and ALS system will MELT your manifold, and your impeller. Not good.

Its preaty much usless for street use. And for dragracing its completely useless, becuase the time it takes to engage and disengage the system isnt worth it. Right off the line it would work well, but after that it would be preaty damn pointless, and may actually make the engine lag when it adjusts the cams phase.

Unless you have about 10 grand to dump into a complete exaust, and turbo kit...stick with a plain ole turbo kits and leave it at that. Unless your runing stage II turbo or higher, its not worth it.

Unless you know alot about turbo setups, you shouldent even consider it.

I think its more along the lines of this:

- when you lift off the throttle from acceleration, the ecu retards the timing by a large amount. During this, extra fuel is dumped in the chamber causing backfire moreless. This backfire is what keeps the turbo spooled up and not leaving it to spool down. Hence the system name "anti-lag" . It is not necessarly hard on the manifolds, but it is hard on the turbo lifespan because of the constant high temperatures that the anti-lag produces.
Anti-lag system does not involved adjusting cam-timing, just ignition timing. And it I don't think it makes any boost at idle(unless you are revving it) But I think you are confusing it with launch control system.

[Siim]

Kas keegi Eestis bang-bangi kasutab ka? (Tänavaautol)

Või kas keegi äkki lausa valmistab?

[Ar21]

Ma olen kusagilt lugenud, et n.n. tänavasummuti peksaks anti-lag süsteem ~50 km sõiduga laiali. Siis peab ka sellele vastava tugevusega summuti olema. Turbo elueale ei mõju see samuti pikendavalt, kuna turbo pöörded ei tõuse sujuvalt nagu tavaliselt vaid lausa plahvatuslikult ühe hetkega.

[xjan]

täpsustuseks lisaksin, et ALS vajab lisaks süüte kruttimisele ja kütuse lisamisele ka õhku. Tatechi puhul näiteks aktiveeritakse ALS rakendumisel lisaklapp (2 tühikäigumootorit sobib ka selleks n.), mis antud õhu siis ka lisab.

[Raceboy]

Piisavalt suurest tühikäigumootorist piisab täiesti, aga see peab olema PWM-tüüpi. Enamikul ajudel kasutatakse selle käitamiseks vabalt programmeeritavat (FET või IGBT, st. suurt võimsust taluvat) väljundit ning seda saab kasutada nii anti-lagi, launch control'i kui cruise controlina.