Electronic Stability Program (ESP) is actually a comprehensive strategy for vehicle body stability control. It includes anti-lock brake system (ABS) and drive wheel anti-skid system (ASR). It can be said that it is A functional extension based on other active and passive security systems, not as a standalone configuration.
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The matching ESP system on these two models includes nine detailed functions: ABS (anti-dead brake system), EBD (electronic brake force distribution system), ESBS (extended electronic stability brake system), HVV (post Bridge full deceleration), ASR (traction control system), EDL (electronic differential lock), MASR (engine drag torque control), HBA (hydraulic auxiliary brake) and LDE (low power ESP).
So, nowadays, the ESP system equipped on many models has a mystery between them. Next, we will analyze it for you in detail. Below, let's take a look at the above functions, what will play a role in daily driving. (Note: The ESP system on both models is not provided by BOSH, Magotan is supplied by TRW, and Sagitar is supplied by Continental Teves. )
EBD (Electronic Brake Force Distribution System)
EBD, also known as EBFD, translated into Chinese as "Electronic Brake Force Distribution System", which can dynamically distribute the braking force of the electronic active safety system to four wheels according to the vehicle condition, road condition and braking state. This system is actually ABS. An auxiliary function.
The working principle of the EBD system: the driver steps on the brake pedal, and the EBD starts working; the vehicle quality sensor calculates the vehicle quality and submits it to the ECU; the wheel sensor transmits the current four-wheel speed, friction and other information. To the ECU; after receiving the data, the ECU calculates how much brake pressure should be allocated for each wheel through the arithmetic module; the brake force distributor starts to notify the ABS to stand by; the ABS system is started when necessary; the braking starts.
ABS (anti-dead lock brake system)
ABS, which is often mentioned in Chinese, is translated into Chinese as "anti-dead lock brake system". The ABS anti-lock brake system is divided into mechanical and electronic type. The mechanical ABS has a simple structure. It mainly uses its own internal structure to achieve the effect of simply adjusting the braking force. There is no sensor to feedback the road friction and wheel speed signals. The set data works, so it works the same way in any road conditions. At present, only some low-end pickup trucks in China still use mechanical ABS. Once the wheel is about to be locked, the electronic controller will issue a command to the electromagnetic regulator, which controls the hydraulic pressure distribution valve to adjust the brake cylinder of each wheel to control the brakes in the form of “one release and one chargeâ€. The friction plate releases the locking phenomenon of the wheel.
The electronic ABS consists of hydraulic brake system, wheel speed sensor, electronic controller and electromagnetic regulator. The working principle is that the wheel speed sensor monitors the rotation speed of the wheel, and the monitoring signal is collected and analyzed in the electronic controller. The system can continuously brake 60 to 120 times in one second when the wheel is about to lock up in the case of car braking, which is similar to the mechanical "point brake". In this way, the direction of the emergency brake can be effectively prevented from being out of control or the wheel is slipped. At the same time, since the wheel is not locked when the brake is applied, the tire does not rub against the ground at one point, thereby increasing the friction and making the braking efficiency reach 90%. the above.
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When the car is braked, if the conditions of the four tires attached to the ground are different, such as the left wheel attached to the slippery road surface and the right wheel attached to the dry road surface, the friction between the four wheels and the ground is different, when braking (The four wheels have the same braking force), which is prone to slip, tilt and rollover. The EBD system adjusts the brake pressure of each tire in time to ensure efficient and smooth deceleration.
ASR (drive anti-skid system)
The ASR system is actually an upgraded version of ABS. It is equipped with an expandable hydraulic device, a booster pump, a hydraulic pressure cylinder, a fourth wheel speed sensor, a complex electronic system and a controller with its own controller. Electronic acceleration system. I believe that some friends who are interested in vehicles are not unfamiliar when they come to ASR. It is called "Antriebs-Schlupf-Regelung". The Chinese name is the driving anti-skid system, which belongs to the active safety device, also known as the traction control system.
When the driving wheel slips, the ASR compares the wheel speeds, and the electronic system determines whether the driving wheel is slipping, and immediately reduces the throttle intake air amount, reduces the engine speed to reduce the power output, and brakes the slipping driving wheel. This will reduce the slippage and maintain the most suitable power output between the tire and the ground grip. No matter how oil is supplied, the drive wheel will not slip under the intervention of ASR. It can effectively prevent the phenomenon of slippage when the driving wheel of the car accelerates, especially on special roads with less friction such as rain, snow, hail and road freezing.
HVV (full rear axle reduction)
The full name of the HVV is "Hinterachs-Voll-Verzgerung" and the rear axle is fully decelerated. The system will increase the brake oil pressure of the rear wheel when the front wheel of the vehicle enters the ABS state, but the rear wheel does not start to move, so that the rear wheel also enters the ABS state, thereby providing rapid braking performance and effectively shortening. Braking distance.
ESBS (Extended Electronic Stabilized Brake System)
ESBS's English name is “Erweitertes-Stabilitts-Brems-Systemâ€, which is “Extended Electronic Stabilization Brake Systemâ€. This system is also another auxiliary function of ABS, which can increase the stability of the vehicle while reducing the risk of slipping. Effectively avoid serious accidents by stabilizing the vehicle in an emergency and preventing slipping.
EDL (Electronic Differential Lock)
EDL English is spelled "Elektronische-Differential-Sperre" or electronic differential lock. It is also an extension of ABS that is used to identify whether the wheel loses friction with the ground and thus controls the car's acceleration slip. When the electronic control unit determines that one side of the driving wheel is slipping, the system performs appropriate strength braking on the wheel through the hydraulic control unit, thereby improving the adhesion utilization rate of the other side driving wheel to improve the passing ability of the vehicle.
MASR (Engine Resistance Torque Control)
MASR is the driving anti-skid system. The function of this electronic safety system is very similar to that of TCS (Traction Control System). It is mainly used in Volkswagen's models, and it is also the function expansion of ABS. The function is to identify the slip ratio by means of the ABS sensor, and automatically reduce the engine resistance torque by means of the vehicle data bus, thereby achieving the purpose of reducing the slip ratio and ensuring the running stability of the vehicle. In addition, when the vehicle starts or accelerates on a road with poor adhesion conditions, the MASR system can automatically reduce the engine torque to prevent the driving wheel from slipping and the vehicle starts smoothly.
Summary: Compared with all the models currently sold in the domestic market, not all of them are equipped with the latest version of the ESP system. Therefore, we should not only pay attention to whether the car is equipped with an ESP system, but also more. Learn more about whether the ESP system it matches is powerful enough. Different versions of ESP systems, the main difference between them is that the efficiency is more optimized (complete), the stability is stronger, and the safety of the vehicle is more comprehensive. However, due to cost constraints, the price is relatively high. .
In addition, the higher version of the ESP system is also faster (CPU from 8K-16K-48K or even higher 128K), the brake frequency is also automatically braked from several times, ten times, twenty times, or even Now up to 150 times per second. In terms of efficacy, these functions can be divided into three categories: ABS, EBV, and ESBS are mainly used to prevent wheel lock; MASR, EDL, and ASR are mainly used to drive anti-skid; and HVV, EDL, In a sense, LDEs are called the “luxury configuration†of ESP, because in the current electronic stability system on most models, the existence of these three functions is still very rare.
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