luni, 10 septembrie 2012

Ce inseamna controlul tractiunii ? (bmw e46 320d)

 Pentru motoarele utilizate de regulă cu cuplu motor ridicat, sistemul de control al tracţiunii oferă un confort şi o siguranţă suplimentară, în special pe un carosabil cu aderenţă diferită la roţi sau alunecos.
Sistemul de control al tracţiunii permite pornirea şi accelerarea armonioasă fără răsucirea în gol a roţilor sau apariţia unui decalajul lateral, indiferent de viteză. Sistemul de control al tracţiunii funcţionează numai împreună cu acceleraţia controlată electronic şi valorifică senzorii de turaţie a roţilor corespunzători sistemelor anti-blocare (ABS). În cazul în care se constată o creştere bruscă a turaţiei la nivelul unei roţi motoare (alunecare), sistemul acţionează asupra managementului motorului, reduce puterea propulsorului şi evită apariţia acestui efect. Sistemul de control al tracţiunii asigură tracţiunea şi stabilitatea de rulare pe parcursul etapei de accelerare la orice viteză şi susţine în acest mod siguranţa activă. În mod suplimentar permite reducerea gradului de uzură a anvelopelor. Activarea sistemului de control al tracţiunii este indicată prin intermediul unui led care luminează intermitent la nivelul instrumentuluide bord, include sistemul de blocare electronică a diferenţialului (EDS) şi face parte din sistemul electronic de control al traiectoriei (ESP). Dezactivarea sistemului de control al tracţiunii este posibilă prin intermediul comutatorului ESP OFF.

ASC - automatic stability control - din cate stiu eu functioneaza in cazul in care aderenta rotilor spate se rupe, accelerari si franari, actionand ca un diferential blocabil pentru roata ce rupe aderenta, de asemenea actionanad si asupra motorului nelivrand cuplu rotilor

ABS
Sistemul de antiblocare al rotilor – Cu ajutorul senzorilor inductivi, calculatorul ABS, înregistrează viteza de rotaţie al roţilor, dacă o roată tinde să se blocheze forta de frânare va fi scazuta până când alunecarea este anihilată.

ASR
Sistemul de reglarea a fortei de tractiune – reduce momentul de rotaţie al motorului în cazul in care, la demaraj, roţile tind sa patineze, astfel asigurand o aderenţă mai bună pe drumurile cu aderenta scazuta, nisip-zapada-gheata. Dacă o roata începe să patineze, calculatorul motorului reduce sistematic cantitatea de combustibil injectat, lucru prin care puterea motorului, si cu aceasta forţa de tractiune care trebuie transmisă, se reduce.

EBV
Distribuţia electronică a forţei de frânare. La autovehiculele cu tractiune faţă, partea din faţa este mai grea decât partea din spate, astfel încât în cazul acţionării frânelor, centrul de greutate al autovehiculului se deplasează spre faţă. Prin aceasta aderenta la rotile spate scade simtitor si rotile tind sa se blocheze. Prin distributia forţei de frânare, franarea automobilului se realizeaza mai eficient, iar fenomenul de blocare al rotilor este inlaturat.

EDS
Blocarea electronică a diferenţialului. Dacă o roată motoare pierde aderenta, in conditii grele de deplasare, inpiedicand deplasarea autovehiculului, printr-o forta de frânare definită, roata fara aderenta este frânată, astfel forta de tractiune asupra roţii se deviază catre roata cu aderenţă mai bună, permitand deplasarea .

ESP
Program electronic de asigurare a stabilităţii. Cu ajutorul ESP-ului se poate creşte capacitatea de control asupra autovehiculului în situaţiile limită ale dinamicii de deplasare. De exemplu, în cazul curbelor luate prea rapid. ESP-ul extinde funcţia ABS si reduce pericolul de derapare, în orice condiţii ale carosabilului. Prin intervenţia punctuală asupra managementului motorului şi asupra frânelor, ESP-ul împiedică o posibilă derapare a autovehiculului. ESP-ul actioneaza în întreg domeniul de viteze şi se cuplează automat la fiecare pornire a motorului. Acest sistem poate fi cuplat şi decuplat în caz de necesitate, prin apăsarea tastei ESP. Dacă ESP-ul este decuplat, lampa de control este aprinsă în permanenţă. Acest lucru este însă recomandat numai în cazul rularii cu lanţuri de zăpadă şi în cazul suprafeţelor de rulare afanate, necompacte de exemplu zăpadă , nisip, pietris.

MSR
Reglarea momentului de rotatie al motorului. Acesta funcţie este integrata în sistemul Traction Control (TCS). Dacă pe o suprafaţă carosabilă cu polei sau gheaţă se decelereaza brusc sau se trece într-o treapta de viteză inferioară, are loc o alunecare a roţilor motoare. MSR-ul înregistrează acest lucru prin senzorii sistemului antiblocare şi stabilizeaza, printr-o ridicare dirijată a turatiei motorului, starea autovehiculului.

Definitii luate dupa bmw.com sunt mai jos:

Automatic Stability Control (ASC).
On uneven or slippery road surfaces the Automatic Stability Control (ASC) system ensures you can accelerate out of each bend safely and with maximum traction.

Automatic Stability Control (ASC) is an element of the Dynamic Stability Control (DSC) system. It prevents loss of traction on the drive wheels when setting off, when accelerating out of curves and in other critical moments. When one wheel has good traction but the other is on a slippery patch of road, the wheel with less traction is braked until it is again able to gain a grip on the road surface.
If both wheels lose traction, the engine management system also intervenes and reduces the power output, which significantly reduces the danger of the rear of the vehicle skidding out. The entire process takes place in milliseconds.
Thus ASC quickly brings the vehicle back to stability and restores traction. Drivers wishing to attain a degree of wheel slip, for example when aiming to have a certain amount of "drift", can disengage ASC if desired.

Dynamic Stability Control (DSC) adds to safety by facilitating vehicle control even in adverse driving conditions or on tough surfaces.

Dynamic Stability Control (DSC) is the nucleus of the chassis control systems in BMW vehicles. It ensures the highest possible levels of stability when driving, and it maximizes traction of all wheels when setting off or accelerating. It is able to detect the first signs of oversteering or understeering and helps keep the vehicle safely on course, even if the tyres have varying levels of grip.
Sophisticated sensors permanently check how the vehicle is driving. Information comes a range of sensors monitoring wheel rotation, steering angle, lateral forces, pressure and yaw (degree of rotation around the vertical axis). A simulation model stored in the DSC control unit to ensure stability ("one-/two-track model") and can be compared information coming from the steering wheel and accelerator: if there is too great a difference between the model and how the vehicle is currently travelling, DSC acts to increase stability or traction.
The engine and brake management systems are targeted specifically; xDrive is also included in all-wheel drive vehicles. Reducing or increasing the engine torque or braking individual wheels can improve stability and traction. Active Steering’s integrated yaw regulation system can even help significantly reduce steering effort and the extent of DSC’s contribution to stability.

Dynamic Traction Control (DTC) allows for sports-style driving dynamics even when DSC is controlling stability and when wheel traction is higher.

Dynamic Traction Control (DTC) is a sub-function of the Dynamic Stability Control (DSC) system that can be turned on and off. DTC has two major uses: to regulate traction and to enable sports-style driving while providing active stability control.
If the front wheels are stuck in snow and cannot spin properly, this leads to slip on the rear wheels (when they spin faster than the front wheels, generally a sign that performance has been exceeded) and DSC acts to change engine output: the power needed for forward movement is reduced. Switching to DTC has a positive effect on this situation, as traction is improved without a loss of power.
When DTC is on, it helps the driver alleviate the situation enough for DSC's measures to become effective. The driver retains complete control over the vehicle.

The BMW all-wheel drive system, xDrive, ensures your BMW has the best possible traction at all times, enhancing agility and keeping you safely on track, even on fast bends.

xDrive is the permanent all-wheel drive system from BMW: under normal circumstances, it distributes driver power between the front and rear axles in a 40:60 ratio, and changes this figure variably when the road surface or overall driving conditions change.
Acting virtually instantaneously and a manner so subtle as to be go virtually unnoticed by the vehicle's occupants, xDrive can direct up to 100% of drive forces to one axle. Enabling the driver to start up effortlessly even on slippery surfaces or steep hills, xDrive routes all power to the axles with the greatest traction. When parking, the system reacts to the need for high manoeuvrability at low speed by opening the clutch completely so the powertrain functions optimally.
At the first sign of understeering, drive power to the front axle is reduced. If oversteering is detected, xDrive directs more power to the front axle. Thanks to this dynamic redistribution of power, vehicle stability returns to normal even before the driver notices anything amiss.
Driving on a winding road or taking a fast bend in dynamic style is particularly enjoyable with xDrive: you feel as if your BMW is being guided along the curve. xDrive ensures that none of drive power is wasted on a loss of traction: every kilowatt of power is effectively brought to bear on the road.
xDrive is regulated by Dynamic Stability Control (DSC) and uses information from the latter system’s sensors to monitor road conditions. In addition, brake force courtesy of DSC is used when there is traction difference between the two sides of the vehicle and wheel spin is likely. 

5 comentarii:

  1. ce rol are dsc am un bmw e46 320d astept un raspuns va rog

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  2. ce rol are dsc la bmw e46

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  3. Dynamic Stability Control (DSC) adica permite sa conduci sport oferind stabilitate.

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  4. Dynamic Stability Control (DSC).
    Dynamic Stability Control (DSC) not only optimises driving stability when starting or accelerating, it also improves traction. In addition, the system recognises unstable driving conditions such as under - or oversteering and helps to maintain a safe course for the vehicle.
    Advanced sensory technology monitors the wheel rotation speed, lateral acceleration and the yaw rate (rotation around the vertical axis). This data is processed to obtain information about the automobile as it is currently moving, and is compared with data about how it should be currently moving, as supplied by the accelerator and the angle of the steering wheel.
    If these two lists of data do not match and the automobile s stability is threatened, DSC is activated and influences the brake system or the engine management. This action helps prevent dangerous situations such as skidding.

    Dynamic Traction Control (DTC).
    Compared to Dynamic Stability Control (DSC), Dynamic Traction Control (DTC) provides rear wheel vehicles with greater propulsion. This increased strength serves different purposes depending on the type of automobile. In the 5 Series and 7 Series, for example, it is ideal for straight stretches of road, and for maximum power when driving in snow or sleet.
    In the 3 Series and Z4 Roadster, DTC also plays a role when on bends - it enhances the car's propulsion and its sports-style qualities. The driver is in full control of their vehicle within a predetermined parameter: the regulatory functions are inactive. DSC optimises directional stability within certain boundaries.

    Active Steering
    Active Steering gives drivers more precise handling and tracking: this ensures that their automobiles are more mobile and agile even on twisting roads. A planetary gear is integrated with the steering column; depending on the situation, the feature varies the angle of steering determined by the user at the wheel (superimposed steering).
    It increases the steering angle at lower and mid-range speeds; by contrast, at higher speeds (e.g. on motorways), the steering angle is reduced. When parking, the active steering feature makes it easier to manoeuvre by amplifying the movements of the steering wheel.

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  5. aveti idee unde se afla modulul asta am codul de eroare 5e38 stiu piesa dar nu o gasesc nu stiu unde este in masina . masina este un e46 2004 320d fl

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