Quattro / 4 Motion
A3, tt (siiani k?ik), golf 4 - 5, bora, cupra, fabia kasutavad haldex sidurit ja nurk reduktroit. Juhitakse 6 osallist sidurite plokki läbi absi andurite elektrilise õlipumba ja aju abil. Alates 98a kasutusel.
Haldex All Wheel Drive System
Haldex Generation I, 1998-
Haldex Generation II, 2002-
Haldex Generation III, 2004-
Haldex Generation IV, 2008-
Haldex XWD, 2007-
Haldexist üks klipp aga kahjuks keel mulle arusaamatu.
http://www.youtube.com/watch?v=CGfn-OqjgyY&feature
http://www.awd.ee/haldex.html
Tavaolukorras esivedune kui ei esine läbilibisemist. Reaktsiooni aeg 20" ratta pööret. Ehk siis jutt käib milli sekunditest sõidu ajal. Ja reaktsiooni aja määrab abs rõnga vahede pikkus
.Syncro / 4motion
Passat 81-88 pikimootor keskdifri ja tagadifri lukustamis võimalusega. Mõlemad difrid avatud normaal olukorras.
Passat 89-96 visko sidur silikooni baasil. Mehaaniline juhtimine, nurk reduktor. Ristimootor
Passat 96-05 Audidel kasutatav torsen. Pikimootor elektroonilised difri lukud (EDL)
Passat 05- haldex ja nurk reduktor. Ristimootor.
Torsen keskdiffer suudab veoj?udu jagada m?lema silla suunas v?idetavalt 25/75 . Haldex ainult suunata lisa j?udu tagasilla suuunas 95/5% kuni 50/50%.
Lisa materjali mida olen netist leidnud mis osaliselt haakub teemaga.
http://www.vwklubi.org/forum/viewthread" onclick="window.open(this.href);return false; ... #pid250423
wicki jutt asjast, v?lja toodud ka audi torseni erinevad generatsioonid.:
http://en.wikipedia.org/wiki/Quattro_" onclick="window.open(this.href);return false;%2 ... _system%29
Leidisn ühe teema netist kus räägitakse asjalikult. Kas seal ka vigu esineb ei tea.
[email]http://www.ultimatesubaru.org/forum/sho ... p?p=848161[/email]
2) Viscous-Coupling differential
Viscous Coupling center LSD is commonly used in many simple 4WD systems. One of the earliest examples was Volkswagen's Syncro system.
Inside a viscous coupler as shown in the right hand side picture, there are many circular plates positioning very close to each other. Both drive shafts connect to roughly half of the plates in an alternating sequence as shown. The sealed differential housing is fully contain of a high viscosity liquid, which has a strong tendency to "visco" those plates together.
In normal condition, front and rear axles run at roughly the same speed so the plates and viscous liquid are relatively stable to each other. When tyre slip occurs in one of the axle, that means the alternating plates run at different speed, viscous liquid will try to visco them together. As a result, torque is transferred from the faster driveshaft through the liquid to the slower driveshaft. The greater the speed difference, the larger the torque transfer. As a result, limited slip function is implemented.
Characteristic of Viscous Coupling center differential
Note that Viscous-Coupling LSD is a speed-sensing device: under no-slip condition, no torque will be sent to another axle. Whenever slip occurs, theoretically up to 100% torque can be sent to any axle, depending on the traction difference between front and rear axle. Therefore it is a part-time 4WD.Being a part-time 4WD, it does not have the neutral steering of a permanent 4WD can obtain. For cars based on rear-wheel drive models, such as Porsche 911 Carrera 4, this is not a real problem - as normally the car runs like a RWD car thus is capable to deliver the desirable throttle oversteer . However, for other front-wheel drive-based cars like VW Golf Syncro and Volvo 850 AWD, the part-time 4WD can do nothing to correct their understeering manner. This is the first disadvantage.
The next problem is the delay before the 4WD get into effective. Since viscous liquid is not a fixed medium (unlike gear), it takes time and speed difference to be effective. The function between speed difference and torque transfer is an exponential function - that means in the early stage of slip, torque transfer remains near zero.
To cure this problem, most manufacturer varies the final drive ratio such that introduce a slightly speed difference even in normal condition. As a result, the car actually runs with 95:5 torque split between front and rear. This shorten the delay time. However, it is still impossible to match the pure mechanical Torsen LSD.
It might be less effective than Torsen system, but it is certainly the cheapest, so we can find it in many mass production 4WD cars.
Advantage: Cheap and compact Disadvantage: Part-time 4WD only. Normally feels like 2WD. Who use it ? VW Syncro, Lamborghini Diablo VT, Porsche 993/996 Carrera 4 and Turbo, Volvo 850 AWD etc.
3) Viscous Coupling Differential Lock
While Torsen 4WD is too expensive, Viscous-Coupling LSD is part-time only, most 4WD cars, including the rally ace Celica GT4, Subaru Impreza, Mitsubishi Lancer and Ford Escort RS Cosworth adopted another kind of center differential - basically it has a regular center differential which distribute torque to front and rear under normal condition, an additional Viscous Coupling Differential Lock provides anti-slip function when needed.Characteristic of this system
The Viscous-Coupling Differential Lock is virtually the same as what we have learned earlier, therefore it also has slight delay and non-linear characteristic. However, in reality this might not be as serious as we thought, otherwise it would have been impossible that all the top rally cars use it. Moreover, Viscous-Coupling Differential Lock system is lighter and cheaper than Torsen system, while having superior effectiveness over the part-time Viscous-Coupling LSD system.
Advantage: Good balance between price and effectiveness Disadvantage: No special flaw Who use it ?
Lancia Delta Integrale (with Torsen in rear axle)
Ford Escort RS Cosworth (with Viscous-Coupling LSD in rear axle)
Mitsubishi Lancer GSR, 3000 GT VR4. (with Viscous-Coupling LSD in rear axle)
Subaru Impreza and Legacy manual versions (with Viscous-Coupling LSD in rear axle)
Toyota Celica GT4 (with Torsen in rear axle)
Bugatti EB110 (set to 70% rear bias)
. Helista äkki pühap saab kokku. Mul on haldex tagadiffer olemas kuhu peaks proovima siis audi esi difrit kui need sobivad siis läheb sinna ka audi v8 tagadiffer.
). Lihtsalt kuidas räägitakse, et Haldex pole nelivedu. Seega ainus õige nelivedu oleks 3-e Torseniga või analoogiga.
:lol::lol: