Sisteme AWD, care e cel mai bun? |
This topic is about Sisteme AWD, care e cel mai bun?, the author, , wrote about: ... To read more just scroll down
Sisteme AWD, care e cel mai bun? |
Jun 4 2005, 02:14 PM
Post
#1
|
|
specialist Group: Membri Posts: 4.583 Joined: 30-May 04 From: Honda World Member No.: 26.577 |
In 1980, Audi introduced the world to full-time all-wheel drive to volume-produced passenger cars. It was called quattro. Now in its fourth generation, Audi's quattro® permanent all-wheel drive directs power where and when it's needed. Under ideal conditions power is split 50/50 front to rear. But in extreme cases up to 67% of the engine's power can be directed to a single wheel. The benefits to the driver are safety, performance, power, and control in copious amounts. When cornering, all four wheels of a car must cover varying distances. The task of the center differential is to compensate for the differences between front and rear axles, and to distribute engine power between front and rear wheels. The center differential is the heart of Audi's permanent all-wheel driveline. Depending on the driving situation and road conditions, the system automatically regulates the distribution of power within milliseconds. This takes place by means of either (depending on model) the Torsen; differential, Haldex™ clutch, or hydraulic multi-plate clutch. Influencing parameters in the control process include engine speed and torque, wheel spreads, and longitudinal and lateral acceleration. The division of propulsive power between all four wheels is the basis of the excellent handling and safety of Audi models with quattro. The potential of this drive concept is further optimized by a series of control systems for brake and engine management: The Anti-lock Brake System (ABS) Electronic Brake-force Distribution (EBD) Electronic Differential Lock (EDL) Anti-Slip Regulation (ASR) All of the above assist in increasing traction when accelerating or braking. Furthermore, when cornering, the standard Electronic Stabilization Program (ESP) increases directional stability by comparing target and actual physical driving forces. The locking function of the center differential and the Electronic Differential Lock make sure that an Audi with quattro; all-wheel drive can still pull away with only one wheel able to transfer engine power to the road. Here's how it works: If one of the wheels on an axle loses grip and starts spinning, propulsive power has to be diverted to the other wheel by the axle's differential. Previously, a mechanical differential lock enabled this to take place. Now, the Electronic Differential Lock has replaced the mechanical lock, effectively transferring the excess power of the spinning wheel to the other wheels with better traction. On an Audi with quattro, if both wheels on an axle start spinning, the continuously controlled locking of the center differential ensures that most of the torque is transmitted to the other axle. In this way, propulsion is guaranteed in almost all situations. On an Audi with quattro, if both wheels on an axle start spinning, the continuously controlled locking of the center differential ensures that most ( adica 67%) of the torque is transmitted to the other axle. In this way, propulsion is guaranteed in almost all situations. dupa audiusa.com --------------------------------------------- cineva spunea ca diferenta intre 4motion si quattro este Haldex vs. Torsen. Se pare ca e inexact. Torsen este folosit pentru transmisia de la motoare dispuse longitudinal in timp ce Haldex este folosit pt. motoare dispuse transversal. -------------------- Civic Si 2007 2.0l DOHC iVTEC
Acura TL 2006 3.2l SOHC VTEC |
|
|
Jul 1 2005, 05:05 AM
Post
#2
|
|
specialist Group: Membri Posts: 4.583 Joined: 30-May 04 From: Honda World Member No.: 26.577 |
sa reluam discutia cu o chestie asupra careia mi-a atras atentia George ( multzam fain):
ATTESA-ETS, sistemul AWD al Nissan care e original prin faptul ca variaza cuplul transmis fata:spate de la 0:100 pana la 50:50. spre deosebire xi al BMW transmite pe spate maxim 62%, 4matic al Mercedes 60% iar quattro numai 50% din cuplu. asta inseamna RWD pe vreme buna si AWD pe zloata, deic cel mai bun compromis intre utilitate si sportivitate pentru un AWD. singurul minus fata de RWD este greutatea mai mare care rapeste ceva din zvacnirea initiala. ca eficienta mecanica: consumul este numai cu 1mpg mai mare fata de RWD pur in cazul G35. pt. cine nu stie de G35 trebuie sa adaug ca este nemesis-ul lui serie 3 precedenta (E46 in lingo-ul BMW) in cateva teste comparative in reviste americane de prestigiu ( Car&Driver, Motor Trend, Road&Track). http://www.nissannews.com/infiniti/2004veh...5/awdtech.shtml Nissan Skyline/ Infiniti G35x vin cu acest sistem. Bonus este faptul ca Nissan pune prin el pe asfalt 280 de ponei produsi de super-motorul sau 3.5l V6 ( de care am povestit pe motorhead exclusive area)... -------------------- Civic Si 2007 2.0l DOHC iVTEC
Acura TL 2006 3.2l SOHC VTEC |
|
|
Lo-Fi Version | Time is now: 8th May 2024 - 07:04 AM |