What do EBD, DSC, TSC, EBA and VIS on the bus mean?
The answer of the variable intake manifold system (VIS) supplements the DSC body dynamic control system.
The DSC control system independently developed by BMW integrates ASC automatic stability control system and traction control system, which can control the slipping state of the driving wheels by selectively braking the driving wheels with slipping tendency, thus stabilizing the vehicle accordingly. On the ice and snow road, desert or gravel road, the driver can put the vehicle into DTC mode only by pressing a button, thus enhancing the traction of the vehicle on the above roads. At the same time, because the intervention response limit of DSC dynamic stability control system is slightly extended, the traction and driving force of the vehicle are also increased, and drivers can enjoy extraordinary sports driving experience. Another function of DSC dynamic stability control system is CBC curve braking control system, which can eliminate the tendency of oversteer when the vehicle turns slightly through asymmetric braking force control. What is EBA?
EBA emergency brake assist device (electronic brake assist).
In general, most drivers only apply a small force when they start braking, and then increase or adjust the braking force applied to the brake pedal according to the situation. If a much larger braking force must be applied suddenly, or the driver's reaction is too slow, this method will prevent them from applying the maximum braking force in time.
Many drivers are not ready to apply a relatively large braking force, or they react too late. EBA understands the braking behavior of the driver by the speed at which he presses the brake pedal. If it senses that the brake pressure on the brake pedal is increasing in a panic, EBA will start all the braking force in a few milliseconds, which is much faster than the speed at which most drivers move their feet. EBA can significantly shorten the emergency braking distance and help prevent rear-end collisions in stop-and-go traffic.
EBA system * time base monitors the movement of brake pedal. Once it detects that the speed of stepping on the brake pedal increases sharply, and the driver continues to step on the brake pedal vigorously, it will release the stored hydraulic pressure of 180 bar and exert the maximum braking force. Once the driver releases the brake pedal, the EBA system will switch to standby mode. Because the maximum braking force is applied earlier, the emergency braking assistance device can significantly shorten the braking distance. What is EBD?
Electronic braking force display.
When braking, if four tires are attached to the ground under different conditions, such as the left wheel is attached to the wet road surface and the right wheel is attached to the dry road surface, the friction between the four wheels and the ground is different, and when braking (the braking force of the four wheels is the same), it is easy to cause sideslip and rollover. The function of EBD is to calculate the friction value of four tires at high speed due to different adhesion at the moment of braking, and then adjust the braking device to make it adjust at high speed in motion according to the set program, so as to achieve the matching of braking force and friction (traction) and ensure the stability and safety of the vehicle. TCS Traction Control System, also known as tracking control system.
Its function is to detect the tire touchdown limit, and automatically reduce or cut off the power transmitted to the wheel at the moment when the tire is about to slip, so as to keep tracking. When a car brakes on a smooth road, the wheels will slip and even the direction will be out of control. Similarly, when auto start or sudden acceleration occurs, the driving wheels may slip, and there will be a danger that the direction will be out of control on smooth roads such as ice and snow. TCS is designed to solve this problem. When the TCS electronic sensor detects that the speed of the driven wheel is lower than that of the driving wheel (which is the characteristic of slipping), it will send a signal to adjust the ignition time, reduce the valve opening, reduce the throttle, downshift or brake the wheel, so that the wheel will not slip any more. TCS can improve driving stability, acceleration and climbing ability. Originally, TCS was only installed in luxury cars, but now many ordinary cars are also installed. If TCS and ABS are used together, the safety performance of the car will be further improved. TCS and ABS can * * * use the wheel speed sensor on the axle and connect with the driving computer to continuously monitor the speed of each wheel. When the wheel slips at low speed, TCS will immediately "inform" ABS to take action to reduce wheel slip. If slippage is found when driving at high speed, TCS will immediately send an instruction to the driving computer to command the engine to slow down or the transmission to downshift, so that the skidded wheels will not slip again and the vehicle will be prevented from losing control and swinging its tail. Variable intake manifold system
It controls the opening and closing of the valve in the air chamber and adjusts the length of the air inlet pipeline. The valve keeps opening and closing. When the valve is opened, the engine sucks in air. When the valve suddenly closes, the gas will continue to hit the valve due to inertia, then bounce back and oscillate back and forth between the throttle and the valve until the next valve opens and enters the combustion chamber. If the gas just rushes to the valve when the valve is open, the next intake will have a slight supercharging effect, and at this time, the intake efficiency will reach the maximum, and the engine can explode more torque. Whether this situation can be achieved depends on the length of the intake manifold, but at different speeds, the interval between valve opening and closing is different, so the length of the intake manifold to achieve this situation is also different, which is the reason why the variable length intake manifold appears, which can make the engine obtain greater charging efficiency and achieve ideal torque performance at different speed intervals.