4 automatic
The core technology of Mercedes-Benz 4MATIC four-wheel drive is 4ETS differential limiting technology. 4ETS is to use the braking force automatic distribution function of ABS to realize differential limit. When one wheel of this full-time four-wheel drive vehicle slips, the on-board computer brakes the slipping vehicle through ABS to limit its idling. So that the differential can transfer the power transmitted to the skidding wheel to other non-skidding wheels. The newly developed drive system uses planetary gear type inter-axle differential. On all kinds of roads, the full-time fixed power distribution (45/55) of front and rear wheels ensures self-confidence and completely predictable handling. When the wheel slips, the integral multi-disc clutch can ensure extra traction and the best directional stability. It is not difficult to see that with the help of ESP- (electronically controlled vehicle stable driving system), ASR (accelerated slip adjustment) and 4ETS (four-wheel drive electronic traction system) electronic driving safety system, 4MATIC can provide dynamic, comfortable and safe traffic solutions even in poor road conditions.
operating characteristic
4MATIC all-wheel drive system is compact and lightweight, and it also has the best performance in friction. Compared with other all-wheel drive systems, it has obvious advantages: weight, fuel economy, comfort and safety in passive state. Depending on the engine model, the latest product of this all-wheel drive technology is only 66 to 70 kilograms heavier than the ordinary rear-wheel drive system.
Today, Mercedes-Benz has 48 four-wheel drive models including seven vehicle series. Such a rich variety of four-wheel drive models brings extraordinary diversity: starting from C-class and E-class, including new S-class and R-class large sports wagons. In addition, Mercedes-Benz also offers four-wheel drive models of GL-class and M-class off-road vehicles, and as a classic of off-road vehicles, the G-class launched by 1979 adds another choice to this product line. Among all models, C-Class and E-Class offer sedan and station wagon versions equipped with 4MATIC, while the new S-Class and R-Class offer two body shapes.
XDrive intelligent all-wheel drive system BMW's patent xDrive sets a new standard in the sensitivity of all-wheel drive. Its job is to quickly change the torque distribution of the front and rear axles to provide real driving stability, driving pleasure and safety performance. XDrive can be completely adjusted and changed infinitely. It will calculate the situation of understeer or oversteer when turning, and provide the most suitable torque for the required axle at any time.
"iDrive" is the abbreviation of intelligent driving control system. It is a brand-new, simple, safe and convenient future driving concept, which belongs to the category of automatic information driving system. Some luxury cars and concept cars are equipped with this latest technology. Let's take BMW's latest 7 Series as an example.
Because BMW's new 7 Series can provide about 700 functions, it is not only dazzling, but also almost impossible to arrange various switches and function keys in the traditional way. BMW classifies these 700 functions into three categories: 1, and various operations closely related to driving, including gear shifting, are reasonably distributed around the steering wheel. The design of the steering wheel is largely based on the steering wheel of F 1 racing car. Manual or automatic gear driving can be realized through the buttons on the steering wheel, and the conversion between them can be completed. Of course, the traditional gear handle has been sold out; 2. Other commonly used basic functions are kept on the dashboard and operated by traditional switches and buttons, including car phone, air conditioning routine control, audio system routine control, etc. 3. A large number of other functions, including communication, remote network service and some important and very useful comfort functions, are set in a highly integrated central control center. Among them, the functional characteristics of Category 2 and Category 3 can be adjusted according to customers' needs to meet personalized requirements. They are started by the controller installed in the central bracket and can be manipulated at will. The controller is connected to the control display.
The external display devices of the system are the knob controller located in the traditional automobile gear lever position and the LCD screen located in the middle of the instrument panel. This knob functions like a computer mouse. By pushing, pulling, rotating and pressing, it can control multi-level menus on the display screen and select and control hundreds of functions under eight main menus.
For example, the traditional "handbrake" of BMW's new 7 Series has been replaced by the parking button. The driver only needs to press the stop button on the dashboard to make the vehicle "stop and start" smoothly on the inclined road. The stop button also provides the driver with some magical functions in other situations. If deceleration control can be carried out during driving, this button function can be used for reasonable power distribution and driving state control in the stop-and-go state of climbing or traffic jam.
The use of iDrive, an intelligent driving control system, saves a lot of space for setting up traditional control devices, allowing designers to give full play to their talents and creatively design the interior of automobiles, making it more ergonomic and convenient to operate. At the same time, the dashboard is more concise, and the interior space is filled with noble and comfortable atmosphere.
Idrive is very easy to use The eight main courses are climate inside the car, communication (car phone, etc. ), entertainment (CD/ TV and so on. ), navigation, information, BMW service support, function settings and help menu. Among them, the first four main menus that are frequently used can be accessed by pushing and pulling the controller up, down, left and right with the circular knob. Taking climate control as an example, three simple operations can adjust the temperature and airflow distribution in different parts of the car. For example, the heating of a certain seat can be set from the waist position (of course, this is also due to the comfortable seat of BMW), and the airflow is blown out in the set direction at a certain flow rate.
IDrive has a memory function, the driver can store some settings, and the information is automatically stored in the "key" of the car. The car keys of BMW 7 Series are smart cards. After entering the car, put it in the socket, and then just press the "Start/Stop" button to start/stop the engine. In addition, the electronic key can also automatically store the information and data of the car maintenance service, so that customers can get more convenient service.
However, when BMW introduced the iDrive system on the new 7 Series, it caused great controversy because of its relatively complicated operation. Please read the detailed instructions before driving. Some people disagree with this function. On the new 5 Series introduced later, BMW's iDrive system has been greatly simplified, and the advantages of iDrive system have also been fully utilized.
The core of Quattro full-time four-wheel drive is Torsen central differential, which can adjust the distribution of front force and rear axle force faster than any electronic control technology. EDL [1] (electronic differential system) is necessary.
When driving, extra power is transmitted to the wheels to enhance the grip. When the wheels are idling or not touching the ground, these wasted driving forces are transferred to the wheels that may be stressed. Once the speed difference between the front and rear axles caused by external conditions occurs, Torsen will automatically transfer most of the energy to the drive axle that can work without loss, and automatically optimize the power distribution of the four wheels. Because of the balanced distribution of axle load, drivers can better grasp the accuracy and flexibility of steering without torque steering assistance. Twenty-five years ago, Audi engineers set a milestone in the field of drive technology with quattro full-time four-wheel drive.
condition
Today, 1/4 Audi customers trust quattro full-time four-wheel drive to provide better driving pleasure, passability and safety under various driving conditions. Learn more about the performance and technology of this excellent drive concept. The principle is not complicated: four brakes ensure better braking effect, and four driving wheels also achieve better acceleration and higher cornering stability. Audi quattro full-time four-wheel drive is a systematic application of this basic physical principle. However, this is not all: quattro full-time four-wheel drive technology also continuously distributes the driving force between the front axle and the rear axle according to the driving state and road conditions. Especially on wet roads, this means better traction and safe driving, even if both driving wheels lose grip.
Other information
Quattro
Safety active safety
origin
From 65438 to 0977, three young Audi engineers started the research and development of the full-time four-wheel drive project numbered 262, and applied this brand-new drive system to the Volkswagen Iltis military off-road vehicle developed by Audi. As a pioneer of four-wheel drive technology, Audi uses quattro? The coupe set a benchmark at 1980. Many victories in rally races around the world have proved the effectiveness of this driving concept.
condition
Audi has 75 models, and more than 2 million vehicles are equipped with quattro &；; Reg full-time four-wheel drive technology, including
Quattro Cup Tournament
RS4, S8, Allroad Quattro and other models have won many honors for Audi.
With Audi Q7, there is a way.
Audi's unique innovative driving technology, Quattro full-time four-wheel drive, reasonably distributes the driving force to the front and rear axles according to the changes of road surface and environment, so that the car can obtain the best traction and lateral stability regardless of road driving or off-road state, and at the same time reduce the traction effect caused by automatic vehicle righting, providing necessary conditions for high-speed cornering and handling stability. Audi Q7 will give you perfect driving performance. Quattro not only means full-time four-wheel drive, but also represents extraordinary power and fast and safe driving experience.
Italian: the meaning of the number "4"