Foreword
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ABS Chinese is translated as anti-lock brake system or anti-lock brake system. It is an automobile safety control system with the advantages of anti-slip, anti-locking, etc., and is widely used in modern automobiles. Because the control method and working process in the braking process are different from the ordinary braking system in the past, Xiaobian collected data to compile an article about the use points and misuse of the anti-lock braking system for your reference.
ABS is an improved technology based on conventional brakes and can be divided into mechanical and electronic.
The mechanical ABS has a simple structure, mainly a mechanical valve, which uses the feedback of a rubber airbag in the valve body to continuously relax and brake the brake pressure, thereby achieving the result that the tire is not locked. At present, some domestic pickup trucks and low-end passenger cars are mostly taken. This device.
The electronic ABS is composed of a wheel speed sensor, a wire harness, a computer, an ABS hydraulic pump, an indicator light, etc., and can signal the computer system of the car according to the frictional force, the rotational speed, the turning angle and the inclination of the vehicle body. The brake force frequency is distributed by the computer, the torque output of the engine is controlled, and different braking forces are applied to each wheel, thereby achieving the effect of scientifically and rationally distributing the braking force, effectively overcoming the phenomenon of vehicle deviation, side slip and tailing during emergency braking, and preventing The situation that the body is out of control, etc.
Knowing the working principle of ABS, motorists should pay attention to the use of anti-lock braking system from the following aspects:
1. Keep enough braking distance. When driving on a good road, at least three seconds of braking time from the vehicle in front should be guaranteed, and it should be left longer for braking when driving on a bad road.
2. Because the wheels are not locked when the ABS is in emergency braking, the front wheels still have a guiding effect. The driver can use the steering wheel to perform emergency hedging while braking.
3. Never step on the brake pedal repeatedly. Many drivers of old-fashioned hydraulic brake systems are used to repeatedly pressing the brake pedal when braking. It is extremely undesirable when driving an ABS car. Repeatedly stepping on the brake pedal will cause the ABS to turn on and off, resulting in reduced braking performance and system. The moving distance increases. In fact, ABS itself automatically increases and decreases braking force at a higher rate and provides effective steering wheel controllability.
4. When ABS brakes, the high-speed retracting action of the brake cylinder will cause the high-pressure brake fluid to be squeezed frequently, producing a certain sound, and the brake pedal will also have jitter and top foot. Don't be bothered by this phenomenon at this time. Don't hesitate to force the brakes to the bottom and not relax.
5. ABS wheel sensor and ring gear are installed on each wheel, so keep the sensor probe and ring gear clean to prevent mud, oil, especially magnetous substances from adhering to the surface, resulting in sensor failure or loss. A signal error to the computer affects the normal operation of the ABS system.
6. Pay attention to the ABS warning light on the instrument panel during driving. If it is found to be flashing or long, it indicates that the ABS system has stopped working. At this point, the brake system has returned to the normal brake working state, the car can continue to drive, but has no ABS function, should go to the repair shop for repair as soon as possible.
7. The ABS system has very high requirements for brake fluid. Therefore, adding or replacing brake fluid should strictly follow the requirements in the vehicle's instruction manual. Do not mix different types of brake fluid.
Mistake analysis of the brake system
In fact, because many people lack a correct understanding of ABS, it is inevitable that some misconceptions will arise when using it, until the cause of the disaster is not known. Experts said that the use of ABS, need to avoid heavy weight, eliminate some misuse of the concept of use, give full play to its security role.
Misunderstanding 1: The car with ABS will have a much shorter braking distance than a car without ABS.
The reason for this erroneous statement is that ABS tends to function under more urgent braking action, so it gives the impression that the braking distance is shortened after ABS is activated. In fact, the length of the braking distance has a more direct relationship with the friction coefficient of the road surface and the tire. In some cases, the braking distance of the ABS is shorter than that of the ABS, but under other different conditions, the situation will be reversed. Because under normal conditions, the rolling friction coefficient is smaller than the sliding friction coefficient.
Myth 2: There is no side slip phenomenon in the car with ABS.
In fact, the role of ABS only occurs when the brake wheel is locked, and it is essentially different from the role of the electronic driving stability system.
Misunderstanding 3: The braking stability of the car with ABS is improved, and driving can be more daring.
ABS is only an auxiliary system for braking. It can help the driver to control the state of the vehicle during braking and prevent the vehicle from losing steering ability during braking. However, the main control is still the driver, so speeding can still cause an accident.
Conclusion
With the development of the domestic and international automotive industry, the safety of the ABS anti-lock brake system has been greatly improved, but the advanced ABS also has its safety limit range, so motorists should understand the use points of the anti-lock brake system and Use the wrong zone to take the correct driving attitude in the future driving process.
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