汽车液压、液力与气压传动 典型汽车液压系统结构原理分析（Analysis of the structure and principle of automobile hydraulic system for automobile hydraulic, hydraulic and pneumatic transmission）.docVIP

汽车液压、液力与气压传动 典型汽车液压系统结构原理分析（Analysis of the structure and principle of automobile hydraulic system for automobile hydraulic, hydraulic and pneumatic transmission） Examples of automotive hydraulic systems are given I. anti lock braking system (ABS) Composition of 1.ABS system The ABS system is mainly composed of ABS controller (including electronic control unit, hydraulic unit, hydraulic pump, etc.), four wheel speed sensors, ABS fault warning lights, brake warning lights and so on. The composition of the hydraulic system is shown in Figure 1 Figure 1.ABS hydraulic system composition 1- reservoir; 2- safety valve; 3- solenoid valve; 4- brake wheel cylinder; 5- accumulator; 6- pressure alarm switch; 7- brake master cylinder; 8- electric pump Advantages of 2.ABS systems ABS has the following advantages over conventional brake systems: (1) improve braking efficiency. This is because in an emergency braking situation, ABS system could slip rate at around 20%, making full use of the lateral longitudinal peak attachment coefficient and big friction coefficient, the wheel and the ground between the ground maximum braking force, shorten braking distance. (2) to improve the direction stability of automobile braking. When braking, if the wheel lock, lateral adhesion coefficient is very small, the car is easy to slip. ABS controls the slip ratio between 8%~25%, and the lateral adhesion coefficient is large enough to resist lateral perturbations. (3) improve the wheel wear. The car wheel lock pull local cup will cause the tire wear, tire wear will be uneven, the tire wear consumption increased. After the test, the car in emergency braking, the cumulative wear fee caused by tire wheel lock, has more than a set of anti lock braking system cost, shorten the service life of the tire, the ABS system can prevent the occurrence of such a situation. (4) reduce the drivers labor intensity, reduce the drivers nervous tension, and improve the riding comfort and safety of passengers. (5) it