There may be a lot of people in the process of buying a car to hear the introduction of which car has an ESP system, but hearing the word ESP will feel very strange, or do you know that this stuff is a cognac? Is it useless? So today Xiao Bian has come to popular science. What is the role of ESP in the end?
ESP is the abbreviation of Electronic Stability Program, which means body electronic stability system. The ESP system is actually a traction control system. Compared with other traction control systems, the ESP not only controls the driving wheels but also controls the driven wheels. If rear-wheel drive vehicles often experience excessive steering, then the rear wheels will lose control and flick their tails, ESP will brake the outer front wheel to stabilize the car; when the steering is too little, the ESP will brake to correct the tracking direction. Slow the rear wheel to correct the direction of travel.
The ESP system is an important system in the car and usually supports the functions of ABS and ASR. It analyzes the driving state information transmitted from each sensor, and then sends correction instructions to ABS and ASR to help the vehicle maintain dynamic balance. ESP can maintain the best stability of the vehicle under various conditions, and the effect is more obvious in the case of oversteering or understeering. ESP generally needs to install a steering sensor, a wheel sensor, a side slip sensor, a lateral acceleration sensor, and the like.
The ESP system includes ABS (Antilock Braking System) and ASR (Actuating Non-Slip System), which is an extension of the functions of these two systems. Therefore, the ESP is arguably the most advanced form of automotive anti-skid devices. ESP system consists of control unit and steering sensor (steering angle of steering wheel), wheel sensor (monitoring the speed rotation of each wheel), side slip sensor (monitoring the state of body rotating around vertical axis), lateral acceleration sensor (monitoring car cornering The centrifugal force etc. is composed. The control unit judges the operating state of the vehicle through the signals of these sensors and then issues a control command. With ESP and ABS and ASR-only cars, the difference between them is that ABS and ASR can only react passively, and ESP can detect and analyze vehicle conditions and correct driving mistakes before they occur.
ESP is particularly sensitive to oversteer or understeer. For example, if a car is oversteered on the slippery road (turning too quickly), it will flick to the right. The sensor will feel a slip and it will quickly brake the right front wheel to restore it. Focus on producing a reverse torque and keep the car in its original lane. Of course, everything has a degree range. If a driver blindly drives an express train, any safety device cannot be maintained. In fact, the popular point of ESP is to help the driver to step on the brakes. Unlike ESP-less cars, the ESP-equipped vehicle's braking system has a pressure-accumulation function. Simply put, pressure accumulation means that if the driver does not step on the brakes, the computer can pressurize the brake hose of a certain wheel so that the wheel can generate braking force. In addition, ESP can control the power output of the engine. He can insert any one of the related equipment.
When the speed of the left turn of the vehicle is too fast, the ESP sensor will transmit the information to the computer. The left rear wheel brake will be controlled by the computer to generate a pulling force and torque to change the understeer to the right. When the rear wheel is insufficiently gripped. Or when the rear-wheel-throttle accelerator is oversteered, the ESP will control the right front-wheel brake while reducing the engine's output power and correcting the wrong steering attitude. In the snow, or in the road freezing weather, often during the driving process or the brakes will slip, the body will sometimes be biased to the strong side of the grip, then the ESP will control the stronger wheel reduction system Power to let the car follow the driver's intended driving route.
Having said this, now everyone should have some understanding of ESP? The implementation of the ESP system in many cars has become a standard for many domestic cars. The ESP system still has a certain role in driving safety.
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