Saturated movement along the loaded tracks in itself is very unsafe and, in which case the account goes for seconds. Specifically, these seconds determine the final of someone's life. While driving on the track, the driver must be measured and attentive, besides, under no circumstances are not distracted by the little things. The chauffeur can always think and distract from the road, and this is the inevitable clash, the Pre-Safe system is designed to prevent or minimize harm from the likely collision.
When this system was tested on autostimulants, then 70 ordinary invited German drivers were offered to accelerate to 80 km on an ordinary suburban road and just go. After the chauffeur is more or less adapted to such a driving manner, to distract him from the road to him showed that on the road from the side of his car there was a disaster: cars with police officers, a certain number of people on the side of the road - all this distracted the attention of the majority. The test drivers are so distracted that they did not respond to any signs that the machine was equipped with a clean system pre-Safe, ultimately worked critical brakingwhich reduces the speed by 10 km, but still, with all this, the power of a probable collision is miniaturized by 40%.
This system uses radar technologies, in order to recognize the danger on the road and notify the driver about it. Specifically, these radar technologies have passed unparalleled tests (cars, equipped with Pre-Safe, about 1 million km on ordinary roads, before entering serial creation). The same system was also tested on autoimitators and test polygons. It's not a secret to anyone that the prevention of accidents is one of the priority tasks for at least a self-respecting auto-giant manufacturer, so Mercedes-benz is far from 1st in this case.
The system with pre-Safe is designed to save the life of the driver and not only to him, it was developed by Mercedes-benz. The car, equipped with such a system, gives the driver of visually and on rumor about the critical convergence with another car and the possibility of the appearance of a collision, if the driver does not react to this, then the car itself is in automatic mode Includes partial braking (in the amount of 40% the vehicle brake power is activated in 2.6 seconds to the intended collision).
This system scans all the movement in the car's radius, it gives the driver a few chances to correctly respond and change the situation to turn around. With all this, the driver and the passenger, which comes near, stretch the belts, and in multidisciplinary seats are inflated airbags, the position of the body of passengers and the driver is fixed, everything is fixed so that the body and passenger body accepted the most disgraced position that minimizes damage During the likely accident.
In total, more than 1 second before the collision, the car, equipped with such a system, starts to slow down with a machine, with all this vehicle speed, which moves to a collision is not very significant, but still decreases, and this in turn minimizes the blow strength.
In case the driver responded to the remarks of the car, the latter with the help of a certain system helps it to slow down, with all this the braking force increases. It should be noted that the car Mercedes-Benz before the introduction of this system in mass order was equipped with other security systems, which, with pre-Safe, enhance the safety of the car itself.
The pre-Safe system in combination with other systems from Mercedes-benz significantly minimizes the damage during the accident or helps to warn it. Usually 70% of drivers respond to those signs that the car is equipped with a pre-Safe system, but the other 30% does not respond and the collision still becomes inevitable.
General description of the system
PRE-SAFE system (Passenger's preventive security system) includes the following functions:
* Reversing seat belt tensioner for driver and front passenger
* Setting the front passenger seat position
* Automatic closing of the lifting / slide hatch (SHD).
The Pre-SAFE system is activated in critical road situations (forward), in a situation that can potentially end the accident. Functions that are actually activated before an accident (see the list of functions at the top), should create optimal conditions before the expected collision.
The following control units and elements are active participants in the functioning of the system:
* ARCADE AIRBAG (N2 / 11) Passenger Retention Conduction Unit
* ESP control unit (N30 / 4)
* Driver's reversible belt tensioner (A76)
* Reversing front passenger seat belt tensioner (A76 / 1)
System functioning
Conditions for system operation
* Terminal 15 "incl
* Car speed V\u003e 30 km / h and moving the car forward
Critical conditions for the movement of the car, in which the Pre-Safe system works:
* Emergency braking at which the brake assistant is triggered (BAS)
* Excessive turning (Querdynamik) is determined by: the angle of rotation of the steering wheel, the corner of the drift, transverse acceleration, the rotational speed of the wheels
* Insufficient turning (Querdynamik) is determined by: the angle of rotation of the steering wheel, the corner of the drift, transverse acceleration, the rotational speed of the wheels
Note:
* The critical condition of the car movement is taken into account when moving forward and reverse.
* Information " Reverse gear ON "is sent by the electronic email selection module EWM (N15 / 5).
The PRE-SAFE system trigger logic is integrated into both reversing seat belt tensioner (A76, A76 / 1), that is, both reversing belt tensioner receive and transmit the same signals over the CAN-C data bus that are necessary for the triggering and implementation of the functions of the PRE- system Safe. Depending on which situation is recognized by the Pre-Safe system, emergency braking (QUERDYNAMIK) or car drift (querdynamik), the mode of operation of reversing front-left / front right safety belt tensioners (A76, A76 / 1) differs.
Emergency braking (longitudinal dynamics)
The data transmitted by the ESP control unit (N30 / 4) give the command to the reversing tensioners of safety belts to the front left / front right (A76, A76 / 1), perform the corresponding functions of the Pre-Safe system:
1. Safety belt tension
Prerequisites:
* Both driver safety belt / front passenger fastened
* Front passenger seat is recognized as a busy (signal via a CAN-C data bus from Arcade Airbag (N2 / 11) control unit).
2. Preparation of the front passenger seat for possible movements
The following seats settings must be corrosive:
Longitudinal installation and level setting
Tilt seat backrest
Reversing safety belts front left / right (A76, A76 / 1) cyclically send readiness information on the CAN-C data bus to the central interface of ZGW (N93), and from it on the CAN-B data bus on the front seat control unit Passenger with Memory Function (N32 / 2)
Only if the front passenger seat is not in the optimal position (from the point of view of the collision) and is recognized as the busy (signal over the CAN-C data bus from the Airbag Arcade control unit (N2 / 11)), the seat is set to optimal Position in accordance with the pre-Safe situation.
This automatic installation of the front passenger seat can be interrupted at any time by pressing the seat position adjustment keys.
The return of the seat to the initial position after the completion of the situation associated with the operation of the Pre-Safe system is not performed.
When the Pre-Safe system is triggered, the following settings occur in the seat position:
If the passengers are fastened (the security belt lock is fastened):
* If the angle of inclination of the seat back is greater than 28 ° from the front extreme position, then the seat back is moving into a vertical position. If the angle of inclination is less than 28 °, then no installations are made.
* The angle of inclination of the seat cushion in the front part is installed in the middle position. If the front of the pillow is raised high, then no changes are made.
* If the seat is shifted strongly, it moves 100 mm back from the extreme front position. If on the contrary, it is very shifted back, then moves forward by 50 mm from the extreme rear position.
If the passengers are not fastened (the seat belt lock is not fastened):
* If the angle of inclination of the seat is greater than 20 ° from the front extreme position, then the seat back is moving to a vertical position. If the angle of inclination is less than 20 °, then no installations are made.
* The seat cushion in the front rises up to the extreme position.
* The seat is lowered at the lowest position.
* If the seat is pulled out very far back, then it is pushing forward 100 mm from the extreme rear position. Note:
* Any installation and movement of the headrest of the front passenger associated with the operation of the Pre-Safe system are not provided.
* Functioning of the Pre-Safe system, namely, its impact on the front passenger seat, you can turn off using Star-Diagnose in the settings of the front passenger seat control unit (N32 / 2).
* For the driver's seat, any installation and displacement associated with the work of the Pre-Safe system are not provided.
Cross acceleration of the car (Querdynamik)
1. Safety belt tension: (see emergency braking)
2. Preparation of the front passenger seat for possible movements: (see emergency braking)
3. Closing the lifting and sliding hatch (SHD): Signals from the ESP control unit (N30 / 4) and the steering column module (N80) causes the operation of the Pre-Safe system, namely: reversing safety belt tensioners (front left / front right (A76 , A76 / 1), lifting and sliding hatch (SHD) closes
The DBE (N70) ceiling control panel automatically closes the lifting hatch (SHD) after receiving the "command" from the Pre-Safe system over the CAN-B data bus through the ZGW central interface (N93). This feature at any moment can be canceled by influencing the switch-sliding hatch control switch (N70S1). If the DBE control unit (N70) continues to receive information about the operation of the Pre-Safe system, the hatch closing process is renewed again. Return of the lifting hatch to the initial position after the completion of the situation associated with the operation of the Pre-Safe system is not performed.
Note:
When closing the hatch running protection from pinching. When recognizing the obstacle, the hatch drive switches to reversible traffic. For optionally installed sliding glass roof (on the W251 type), the Pre-Safe system is not offered.
End of action of the Pre-Safe system
Reversible safety belts front left / front right (A76, A76 / 1) Install the control signal over the CAN-C data bus per passive level if the situation associated with the PRE-SAFE system is no longer recognized.
Accordingly, if the adjustment of the front passenger seat position is interrupted by the passenger seat control unit (N32 / 2), with memory, although the optimal position for the Pre-Safe system has not yet been reached. If the acceleration of the car reaches the value less than 0.3 g (negative acceleration), then reversing safety belt tensioners front left / front right (A76, A76 / 1) Weaken the additionally stretched driver and front passenger seat belts. If the first stage of loosening belts was not completed successfully, then the second attempt to loosen seat belts is initialized. Automatic closing of the lifting and sliding hatch (SHD) at the end of the operation of the Pre-Safe system is not interrupted.
The return of the front passenger seat and the lifting hatch (SHD) in the initial position after completing the situation associated with the operation of the Pre-Safe system, is not performed.
The pre-Safe system proposed by the German Concern daimlerchrysler was one of the latest innovations in the field of security. How it is clear from the title, it works on a collision control.
Today, it is equipped with brand cars and. Machines are equipped with three remote sensors working on the principle of radar. Two of them, with a frequency of 24 GHz, are placed in the front bumper and serve the zone up to 30 m with an angular scan to 80 °. Another, operating at a frequency of 77 GHz-in the radiator grille. He "drill" space in front of a car for a distance of 150 m with a scan of 9 °.
Sensor readings are enrolled in the system control unit. When the distance to the obstacle - for example, the next car is next to you - it is reduced to a dangerous magnitude, dashboard A red warning signal lights up. If the car in front of you is sharply starting to reduce the speed, then the beep sounds additionally. At the same time, Pre-Safe calculates the pressure in brake systemnecessary to prevent collision. When you press the brake pedal, another electronic helper is included in the process - Brake Assist Plus (Bas Plus). However, as practice shows, the drivers do not immediately respond to warning light and sound signalsEven repeatedly repeated. For a particularly inattentive system, the autonomous braking of the car with a slowdown coefficient is provided to 0.4 d. 2.6 ° C. to the estimated time of the collision determined by the control unit, light and sound alarm is triggered, which resembles possible. If the driver still does not react, after a second Pre-Safe takes the situation under its control and already seriously interfere with the car management. Made partial braking. The system gives the driver for a second to aware of the situation. If it does not slow down sharply, Pre-Safe will take measures to reduce the level of possible consequences of the collision.
The system also includes elements passive security For Mercedes-Benz cars. After warning signals, the front seats automatically accept the position optimal for airbag. Open side windows and a hatch in the roof are closed so that the passengers do not fall out of the car with lateral slide or tipping, as well as for more efficient work of the side security side curtains. Pre-Safe works in the speed range from 30 to 180 km / h per highway, where sensors are able to distinguish between individual machines, or up to 70 km / h in a dense city transport.
Yellow warning is burning signal lamp . Electric parking brake faulty.Turn off the ignition.
Click on the handle of the electric parking brake and keep it pressed at least ten seconds. Turn on the first gear. Switch the gearbox to the position. Contact a specialized workshop with qualified personnel. Yellow Warning Signal Lamp and Red control lamp burn. Electric parking brake is faulty.
Release the electric parking brake manually. Or: Release the electric parking brake automatically.
If the electric parking brake continue to move the movement.
Contact a specialized workshop with qualified personnel. The red control lamp flashes and yellow warning warning lights lit. Electric parking brake is faulty.
Turn on the ignition again.
Release the electric parking brake manually.
Turn on the ignition again.
Creating an electric parking brake manually.
If the red control lamp continues to continue the movement.
Put the car from rolling back. Cars S. mechanical box Gears: Turn on the first gear. Cars S. automatic box Gears: Switch the gearbox to the position. Rotate the front wheels to the sidewalk border stone. Contact a specialized workshop with qualified personnel. A yellow warning warning lamp is burning. The red control lamp flashes around ten seconds after the use or release of the electric parking brake. After that, the lamp goes out or continues to burn. Electric parking brake is faulty.
Turn on the ignition again.
Engage electric parking brake.
If the electric parking brake Cars with manual gear: Turn on the first gear.
Cars with automatic transmission: Switch the gearbox to the position. Contact a specialized workshop with qualified personnel.If the electric parking brake contact a specialized workshop with qualified personnel.
A yellow warning warning lamp is burning. When the electric parking brake is engaged or released manually, a red control lamp flashes. Electric parking brake is faulty. Electric parking brake is not delayed manually.
Cars with manual gear: Turn off the ignition.
Intensive movement along the loaded tracks in itself is very dangerous and, in which case the account goes for seconds. It is these seconds that determine the outcome of someone's life. While driving on the track, the driver must be calm and attentive, besides, in no case are not distracted by the little things. The driver can always think and distract from the road, and this will fall into an inevitable collision, the Pre-Safe system is designed to prevent or minimize the damage from a possible collision.
When this system was tested on autostimulants, then 70 ordinary invited German drivers were offered to accelerate to 80 km on a regular country road and just go. After the driver is more or less adapted to such a driving manner, to distract him from the road to him showed that an accident occurred on the road from his car: cars with policemen, some people on the side of the road - all this distracted the attention of the majority. Tested drivers are so distracted that they did not respond to any signs that the machine was supplied, equipped with the Pre-Safe system, eventually worked emergency brakingwhich reduces the speed of 10 km, but nevertheless, the power of a possible collision decreases by 40%.
This system uses radar technologies in order to recognize the threat on the road and notify the driver about it. It is these radar technologies that have passed unprecedented tests (cars equipped with the PRE-SAFE system, about 1 million kilometers on ordinary roads, before entering mass production). The same system was also tested on autoimitators and test polygons. It's no secret that the prevention of accidents is one of the priority task for any self-respecting auto-giant, so Mercedes-Benz is far from the first in this case.
The system at Pre-Safe is designed to save the life of the driver and not only to him, it is designed by Mercedes-Benz. The car equipped with such a system gives you to know the driver visually and on the rumor about the critical convergence with another car and the possibility of a collision, if the driver does not react to this, then the car itself automatically includes partial braking (in the amount of 40% the car brake force is activated 2.6 seconds before the intended collision).
This system scans all the movement in the car's radius, it gives the driver a few chances, in order to respond correctly and change the situation in turning on time. At the same time, the driver and a passenger who sits nearby, the seat belts are tensioning, and airbags are inflated in multidisciplinary seats, while the position of the body of passengers and the driver is recorded, everything is done so that the body and passenger's body takes the safest position that minimizes damage to Time of a possible accident.
In just a little more than 1 second before a collision, a car, equipped with such a system, begins to automatically slow down, while the speed of the car, which moves to the collision is not very much, but still declining, and this in turn minimizes the blow strength.
In the event that the driver responded to the remarks of the car, the latter with the help of a certain system helps it to slow down, while the braking force increases. It is worth noting that mercedes-Benz cars Prior to the introduction of this system in mass order was equipped with other security systems, which, when interacting with Pre-Safe, increased the safety of the car itself.
The pre-Safe system in combination with other Mercedes-Benz systems significantly minimizes the damage during the accident or helps to prevent it. Usually 70% of drivers react to those signs that the car equipped with the PRE-SAFE system, but the remaining 30% does not react and the collision is still inevitable.
