Expansion of the hottest ESC electronic stability

  • Detail

Expansion of ESC electronic stability control system

since the first Mercedes A-class car successfully won the "Elk test" (a sharp turn test to quickly avoid a crash) in the late 1990s, ESC (electronic stability control system) has changed from an emergency method to the basic device of new vehicles. Research from suppliers shows that if the purchase price of the system does not exceed $600, 61% of car buyers show strong purchase interest. However, in the 2007 version of passenger cars, less than 25% of cars will provide such technology. The reason is very simple. Most new car buyers can't imagine that they will need ESC

"it is really difficult to try to sell safety systems such as ESC to consumers," said Scott Dahl, marketing director of chassis system management department of Bosch. "They recognize the value of entertainment systems, but it is difficult to accept the cost of such safety systems.". Perhaps, it is necessary to introduce CSV (an emergency taxi speed control system) to buyers, which can control the lateral speed of the car when it bumps (hitting the curb, taxiing into soft protrusions, etc.), so as to reduce the probability of rollover. For cars, this kind of coasting speed must be controlled at 11 to 18 miles per hour. The acceptance range for light trucks and SUVs is 9 to 13 miles per hour. Of course, it takes more work to make cars, because cars need more effective rut distance. This is the main reason why cars and light trucks have different overturning probabilities in real life, and naturally becomes the reason why many vehicle suppliers installed ESC function on their SUV production lines in the late 1990s

automotive suppliers are constantly committed to expanding the performance of ESC (electronic stability control system), so as to improve the safety of the whole vehicle, and use the powerful function of this system to obtain high surface hardness and large residual tightening stress through high-frequency quenching, which can attract car buyers

in real life, when the surrounding environment will cause the car to overturn, there is no external support or safety space to save you. Due to the hot sales of light trucks and a series of data showing its ability to reduce accidents, ESC will continue to show strong market capabilities with the strengthening of its software functions such as power supply, ground wire noise, electromagnetic interference and so on

another way to attract vehicle manufacturers and consumers to accept this kind of system is to expand the ability of its system by solving the value-added function of special needs. In this way, the market positioning of such systems will no longer be safety systems under extreme circumstances, but daily functions that are needed every day. This is mainly reflected in the additional functions of the brake components in the system, while others are reflected in the addition of more software functions in the hardware. World famous auto parts companies Bosch, continental and Delphi have all added special functions related to ESC to their product structure


hydraulic brake booster system, launched by Robert Bosch Corp., mainly observes the utilization rate of the braking system, compares it with a set of deceleration parameters, and increases the braking pressure as needed. This component also activates the ABS system (anti lock braking system). The hydraulic attenuation compensation system can increase the braking pressure when attenuation is found. The system observes the pressure in the main brake cylinder and compares it with the corresponding action of the wheel, and then uses the ESC pressure pump to raise the pressure to the level of starting the ABS system. The system developed by Bosch has special advantages when vehicles are towing trailers and heavy goods in mountains. The rear wheel hydraulic propulsion system can be used to increase the rear wheel brake pressure when the front axle is in the ABS system mode. By pushing the brake pressure of the rear wheel to reach the ABS level, the rear wheel brake can have stronger functions, such as reducing the parking distance, especially in the case of high load. The rollover control system uses ESC sensor to judge whether the car will rollover under extreme lateral force, and starts the front wheel braking system accordingly. It is said that the reaction time of the system is faster than that of the system relying on the overturning angle sensor. The trailer sway control system works in conjunction with ESC, using the tractor's braking system to prevent the trailer from swinging left and right


active rollover protection system, launched by continental Teves (seamless steel pipe al Teves with continuous greater than 4.8mm), suppresses the excessive inclination of the vehicle body by applying instant braking pressure to the corresponding wheels, and keeps the wheels on the ground. ESC II system combines electronic brake pressure distribution system, ABS system, side slip control system and traction system, supplemented by steering system, to increase or reduce steering action when necessary, so as to keep the car always driving on the right route. Apia system (active passive integration scheme) integrates various current subsystems, which can avoid accidents and reduce injuries. When an accident cannot be avoided, the "dangerous emergency control mode" of the system will start step by step: close the openable roof, adjust the front seat to the best position, raise the window, close the door lock and pre start the braking system, pre tighten the safety belt, and prepare to deploy the airbag. For cars already equipped with ESC and ACC (adaptive speed control system), pretending to have a complete Apia system only costs about $300 extra. Electronic parking aid system may not prevent accidents, but it can help you fully expand the functions of the basic system. He added a side position sensor to the mk.60 electronic braking system produced by continental, which can be used to measure parking clearance and relative body position when driving past parked vehicles. He will calculate the best parallel parking route and help the driver focus on how to accurately maintain the set route through the controlled steering system action on the basis of national standards. Like Bosch's products, Continental also has a trailer sway control system


the four-wheel drive system with enhanced operating functions, launched by Delphi Corp., shows the contribution of subtle synchronous steering (1.0o to 1.5o) of the rear axle to vehicle stability, which is particularly outstanding on large SUVs. The system adds a new generation of software to the ordinary four-wheel drive system, which can greatly enhance the mobility of the vehicle without additional hardware and sensors. The enhanced ESC system improves the software of the brake controller, which can better detect the excessive side slip and overturn of the vehicle, and avoid unwanted actions in advance during the driving process through separate braking actions. (end)

Copyright © 2011 JIN SHI