技术领域technical field
本发明涉及汽车测试技术领域，具体涉及一种汽车制动系统的制动液需液量测试装置及其应用。The invention relates to the technical field of automobile testing, in particular to a brake fluid requirement testing device for an automobile braking system and an application thereof.
背景技术Background technique
汽车的良好的制动系统是行车安全的一个重要保障，当汽车在行驶过程中发生突发事件时，稳定而迅速的制动能很大程度的减小驾驶员以及车外其他人员所受安全威胁。A good braking system of a car is an important guarantee for driving safety. When an emergency occurs while the car is running, stable and rapid braking can greatly reduce the safety of the driver and other people outside the car. threaten.
制动系统结构型式主要有机械式、气动式、液压式、气液混合式。它们的工作原理基本都一样，都是利用制动装置，用工作时产生的摩擦热来逐渐消耗车辆所具有的动能，以达到车辆制动减速，直至停车的目的。The structural types of the braking system mainly include mechanical type, pneumatic type, hydraulic type, and gas-hydraulic hybrid type. Their working principles are basically the same. They all use the braking device to gradually consume the kinetic energy of the vehicle with the frictional heat generated during work, so as to achieve the purpose of braking and decelerating the vehicle until it stops.
汽车液压制动系统是运用最广泛的，其构造很简单，由制动主缸和制动轮缸组成，制动主缸的压力通过管道分向四个制动轮缸上(制动轮缸在四个车轮制动器上)，用脚踩压制动踏板，制动踏板力通过杠杆传递到制动主缸的活塞上，就是给制动主缸加压，制动液通过管道传到四个制动轮缸。制动轮缸实际上是液压执行机构，一般由油缸、活塞等组成。制动主缸压力传过来后迫使两个活塞向外推动，使制动蹄片抵紧制动鼓或夹紧制动盘，通过摩擦使车轮减速，从而起到制动停车的作用。The automobile hydraulic braking system is the most widely used. Its structure is very simple. It consists of a brake master cylinder and a brake wheel cylinder. The pressure of the brake master cylinder is divided into four brake wheel cylinders (brake wheel cylinder On the four wheel brakes), step on the brake pedal with your feet, the brake pedal force is transmitted to the piston of the brake master cylinder through the lever, which is to pressurize the brake master cylinder, and the brake fluid is transmitted to the four brakes through the pipeline. Wheel cylinder. The brake wheel cylinder is actually a hydraulic actuator, generally composed of an oil cylinder, a piston, etc. After the pressure from the brake master cylinder is transmitted, the two pistons are forced to push outward, so that the brake shoe is pressed against the brake drum or the brake disc is clamped, and the wheel is decelerated through friction, thereby playing the role of braking and parking.
对制动管路制动液需液量测试对优化汽车制动系统设计具有重要作用，如压力-液体体积特性。汽车液压制动系统在不制动时，管路中制动液不流动，但在制动过程中，制动液流量小,且管路压力大,特别是装备的电子控制系统主动增压制动时管路压力可达25MPa。现在用以液体流量测量主要基于流量传感器，主要适用于连续、低压流量的测量。流量传感器很难实现汽车制动系统需液量小量程(通常在10ml以内)、高压力(25MPa以上)环境下的测量。The test of the brake fluid demand in the brake line plays an important role in optimizing the design of the automotive brake system, such as the pressure-fluid volume characteristic. When the automobile hydraulic braking system is not braking, the brake fluid in the pipeline does not flow, but during the braking process, the brake fluid flow is small and the pipeline pressure is high, especially the electronic control system equipped with active pressurization The pipeline pressure can reach 25MPa during operation. Now the liquid flow measurement is mainly based on the flow sensor, which is mainly suitable for the measurement of continuous and low pressure flow. It is difficult for the flow sensor to realize the measurement in the environment of the small range (usually within 10ml) and high pressure (above 25MPa) of the fluid required by the automobile brake system.
汽车液压制动系统工作时，由制动主缸流出的制动液与进入制动轮缸的制动液体积不同，而只有进入制动轮缸的制动液才能直接产生制动力。人力踩踏制动踏板，可以作用于制动主缸内的制动液，使其流出。由此可见，试验能直接控制的是制动主缸内的制动液的流出量，只能间接控制制动轮缸的制动液流入量，从而为了控制制动力的大小，研究两者的关系不可或缺。When the automobile hydraulic braking system is working, the brake fluid flowing out from the brake master cylinder is different from the brake fluid entering the brake wheel cylinder, and only the brake fluid entering the brake wheel cylinder can directly generate braking force. Manpower stepping on the brake pedal can act on the brake fluid in the brake master cylinder to make it flow out. It can be seen that the test can directly control the outflow of brake fluid in the brake master cylinder, and can only indirectly control the inflow of brake fluid in the brake wheel cylinder. Therefore, in order to control the magnitude of the braking force, the relationship between the two is studied. Relationships are essential.
发明内容Contents of the invention
本发明为克服现有技术的不足之处，提供了一种原理简单、可操作性强、精确度高的汽车制动系统的制动液需液量测试装置及其应用，以期能精确测量汽车液压制动时的需液量，从而能够研究从制动主缸流出的制动液与进入制动轮缸的制动液的拟合关系，以及通过试验确定制动踏板的最佳行程。In order to overcome the deficiencies of the prior art, the present invention provides a brake fluid demand test device and its application of a simple principle, strong operability and high precision of the automobile braking system, in order to accurately measure the The liquid demand during hydraulic braking can study the fitting relationship between the brake fluid flowing out of the brake master cylinder and the brake fluid entering the brake wheel cylinder, and determine the optimal stroke of the brake pedal through experiments.
本发明为解决技术问题所采用如下技术方案：The present invention adopts following technical scheme for solving technical problems:
本发明一种汽车制动系统的制动液需液量测试装置，所述汽车制动系统包括：制动油液槽、制动主缸、制动踏板、制动硬管、制动软管、制动轮缸和制动器；所述制动踏板与制动主缸相连；所述制动油液槽通过管道与制动主缸相连，所述制动主缸通过所述制动硬管和制动软管与四个制动轮缸相连；所述制动轮缸与制动器相连；其特点是，The invention relates to a brake fluid requirement testing device for an automobile braking system, the automobile braking system comprising: a brake oil tank, a brake master cylinder, a brake pedal, a brake hard pipe, and a brake hose , brake wheel cylinders and brakes; the brake pedal is connected to the brake master cylinder; the brake oil tank is connected to the brake master cylinder through a pipeline, and the brake master cylinder is connected to the brake master cylinder through the brake hard pipe and Brake hoses are connected to four brake wheel cylinders; said brake wheel cylinders are connected to brakes; it is characterized by,
在所述制动软管与制动轮缸的接口处设置有第一需液量测试装置；A first liquid demand testing device is provided at the interface between the brake hose and the brake wheel cylinder;
所述第一需液量测试装置包括：空腔圆管、直线位移传感器、金属杆和工字型活塞；The first liquid demand test device includes: a hollow tube, a linear displacement sensor, a metal rod and an I-shaped piston;
所述空腔圆管分别与所述制动软管与制动轮缸的接口螺纹连接；The hollow tubes are threadedly connected to the interface between the brake hose and the brake wheel cylinder;
在所述空腔圆管内设置有所述工字型活塞；所述工字型活塞与所述空腔圆管过渡配合；在所述工字型活塞的连接杆上垂直设置有所述金属杆；在所述金属杆的顶端设置有所述直线位移传感器；所述直线位移传感器与所述空腔圆管内壁固定连接；The I-shaped piston is arranged in the hollow tube; the I-shaped piston is transitionally fitted with the cavity tube; the metal rod is vertically arranged on the connecting rod of the I-shaped piston ; the top end of the metal rod is provided with the linear displacement sensor; the linear displacement sensor is fixedly connected to the inner wall of the hollow tube;
所述第一需液量测试装置是利用所述制动踏板推动所述制动主缸的制动液经过所述制动硬管流入所述空腔圆管内，从而推动所述工字型活塞运动，将所述制动软管内的制动液压入所述制动轮缸中，并使得所述金属杆能带动所述直线位移传感器上的滑块在所述直线位移传感器上产生位移量；从而获得所述制动轮缸的第一需液量。The first fluid demand test device uses the brake pedal to push the brake fluid of the brake master cylinder through the brake hard tube into the hollow tube, thereby pushing the I-shaped piston The brake hydraulic pressure in the brake hose is injected into the brake wheel cylinder, and the metal rod can drive the slider on the linear displacement sensor to generate displacement on the linear displacement sensor ; Thereby obtaining the first fluid demand of the brake wheel cylinder.
本发明所述的制动液需液量测试装置的特点也在于，The characteristics of the brake fluid demand test device of the present invention are also:
所述第一需液量V是利用式(1)计算获得：The first fluid demand V is calculated using formula (1):
V＝S×L(1)V=S×L(1)
式(1)中，S表示所述工字型活塞的横截面积；L表示所述直线位移传感器的位移量。In formula (1), S represents the cross-sectional area of the I-shaped piston; L represents the displacement of the linear displacement sensor.
本发明一种汽车制动系统的制动液需液量测试装置的应用的特点是，在所述制动硬管与所述制动软管之间再设置第二需液量测试装置；The application of the brake fluid requirement testing device of an automobile braking system in the present invention is characterized in that a second fluid requirement testing device is provided between the brake hard pipe and the brake hose;
对所述第一需液量测试装置所获得的第一需液量与第二需液量测试装置所获得的第二需液量进行比较，从而获得拟合关系。The first liquid demand obtained by the first liquid demand test device is compared with the second liquid demand obtained by the second liquid demand test device, so as to obtain a fitting relationship.
本发明一种汽车制动系统的制动液需液量测试装置的特点也在于，The characteristics of the brake fluid demand test device of a kind of automobile braking system of the present invention are also that,
根据所述制动踏板的行程不同来测试所述第一需液量测试装置所产生的第一需液量；从而确定所述制动踏板的最佳行程；以所述最佳行程产生最优制动力。According to the different strokes of the brake pedal, test the first fluid requirement produced by the first fluid requirement testing device; thereby determine the optimal stroke of the brake pedal; use the optimal stroke to generate the optimal Braking force.
在第一需液量测试装置所在的制动硬管上设置一压力传感器，由第一需液量测试装置和压力传感器构成制动轮缸的P-V特性测试装置；A pressure sensor is arranged on the brake hard pipe where the first liquid demand test device is located, and the P-V characteristic test device of the brake wheel cylinder is formed by the first liquid demand test device and the pressure sensor;
由所述第一需液量测试装置所获得的第一需液量与压力传感器所获得的制动硬管的压强，从而获得所述制动轮缸的P-V特性。The P-V characteristic of the brake wheel cylinder is obtained from the first liquid demand obtained by the first liquid demand test device and the pressure of the brake hard pipe obtained by the pressure sensor.
与现有技术相比，本发明的有益效果体现在：Compared with the prior art, the beneficial effects of the present invention are reflected in:
1、本发明适用于汽车液压制动系统性能测试试验；通过使用体积公式V＝S×L，能方便快捷地计算出体积大小，避免了直接测量制动液流量的不便；而汽车液压制动系统工作时，制动管路压力大且制动液流量流速小，直接测量很难实现，且精度低。1. The present invention is applicable to performance test of automobile hydraulic brake system; by using the volume formula V=S×L, the volume can be calculated conveniently and quickly, avoiding the inconvenience of directly measuring the brake fluid flow; When the system is working, the pressure of the brake pipeline is high and the flow rate of the brake fluid is small, so direct measurement is difficult and the accuracy is low.
2、本发明采用直线位移传感器输出位移信息表征制动液流量，提高了测量结果的精确度。直线位移传感器的功能在于把直线机械位移量转换成电信号。直线位移传感器实践上是一个滑动变阻器，它里面集成了一个信息处理芯片，将滑动变阻器两端电压的变化量转化为位移量。电信号灵敏度高，测量出的位移量精确度高。2. The present invention uses the output displacement information of the linear displacement sensor to represent the brake fluid flow, which improves the accuracy of the measurement results. The function of the linear displacement sensor is to convert the linear mechanical displacement into an electrical signal. The linear displacement sensor is actually a sliding rheostat, which integrates an information processing chip to convert the change in voltage across the sliding rheostat into displacement. The electrical signal has high sensitivity and the measured displacement has high precision.
3、本发明结构简单，易于制作安装。直线位移传感器内部集成了电路，使用方便；直线位移传感器体积小，容易安装。3. The present invention has a simple structure and is easy to manufacture and install. The linear displacement sensor integrates a circuit inside, which is convenient to use; the linear displacement sensor is small in size and easy to install.
4、本发明可以用以研究从制动主缸流出的制动液体积与最终进入制动轮缸的制动液体积之间的关系。在制动硬管与制动软管的连接处安装一个需液量测试装置，再在制动软管与制动轮缸之间设置一个需液量测试装置，分别测量两个需液量测试装置的需液量，进行多次实验，找出两者之间的拟合关系。4. The present invention can be used to study the relationship between the volume of brake fluid flowing out from the brake master cylinder and the volume of brake fluid that finally enters the brake wheel cylinder. Install a liquid demand test device at the connection between the brake hard pipe and the brake hose, and then set a liquid demand test device between the brake hose and the brake wheel cylinder to measure the two liquid demand tests respectively. For the liquid demand of the device, several experiments were carried out to find out the fitting relationship between the two.
5、本发明可以通过试验获取制动踏板的最佳行程；通过制动踏板的不同行程，获取其需液量，随着制动踏板的行程不断增加，其需液量也随之变大，到达一个临界点后，即使增加制动踏板的行程，其需液量保持不变，通过制动踏板行程和制动需液量关系确定制制动踏板的最佳行程。5. The present invention can obtain the optimal stroke of the brake pedal through tests; through the different strokes of the brake pedal, the fluid demand can be obtained, and as the stroke of the brake pedal increases, the fluid demand also becomes larger. After reaching a critical point, even if the stroke of the brake pedal is increased, the amount of liquid required remains unchanged. The optimal stroke of the brake pedal is determined by the relationship between the stroke of the brake pedal and the amount of brake fluid required.
6、本发明可以用以制动轮缸的P-V特性测试试验，找出制动轮缸的制动液体积与制动轮缸压力的拟合关系，可以为压力调节装置的设计与改进提供指导。在制动硬管上设置一压力传感器，因为制动硬管内液压与所连接的制动轮缸内液压相同，可以获得制动轮缸压强。需液量测试装置安装在制动软管与制动轮缸之间，测量进入制动轮缸的制动液流量。由此，可以进行制动轮缸的P-V特性测试试验，经由多次试验，找出制动轮缸的制动液体积与制动轮缸压力的拟合关系。以此为理论基础，可通过控制进入制动轮缸的制动液体积来精确调节制动轮缸压力，以达到最佳制动效果，用以设计与改进压力调节装置。6. The present invention can be used to test the P-V characteristics of the brake wheel cylinder to find out the fitting relationship between the brake fluid volume of the brake wheel cylinder and the pressure of the brake wheel cylinder, which can provide guidance for the design and improvement of the pressure regulating device . A pressure sensor is arranged on the brake hard pipe, because the hydraulic pressure in the brake hard pipe is the same as the hydraulic pressure in the connected brake wheel cylinder, and the pressure of the brake wheel cylinder can be obtained. The liquid demand test device is installed between the brake hose and the brake wheel cylinder to measure the flow of brake fluid entering the brake wheel cylinder. Thus, the P-V characteristic test of the brake wheel cylinder can be carried out, and the fitting relationship between the brake fluid volume of the brake wheel cylinder and the pressure of the brake wheel cylinder can be found out through multiple tests. Based on this theory, the pressure of the brake wheel cylinder can be precisely adjusted by controlling the volume of brake fluid entering the brake wheel cylinder to achieve the best braking effect, which is used to design and improve the pressure adjustment device.
附图说明Description of drawings
图1为一种装有本发明的汽车制动系统的结构示意图；Fig. 1 is a kind of structural representation that the automobile braking system of the present invention is housed;
图2为本发明一种汽车制动系统的制动液需液量测试装置结构示意图；Fig. 2 is a structural schematic diagram of a brake fluid demand testing device of an automobile braking system according to the present invention;
图3为本发明一种汽车制动系统的制动液需液量测试装置的应用示意图；Fig. 3 is the application schematic diagram of the brake fluid requirement testing device of a kind of automobile brake system of the present invention;
图4为本发明一种汽车制动系统的制动液需液量测试装置的第二种应用示意图；Fig. 4 is the second application schematic diagram of the brake fluid requirement testing device of a kind of automobile brake system of the present invention;
图中标号：1制动油液槽；2制动主缸；3制动踏板；4a制动硬管；4b制动软管；5第一需液量测试装置；5a空腔圆管；5b直线位移传感器；5c金属杆；5d工字型活塞；6制动轮缸；7制动器；8第二需液量测试装置；9压力传感器。Labels in the figure: 1 Brake oil tank; 2 Brake master cylinder; 3 Brake pedal; 4a Brake hard pipe; 4b Brake hose; 5 First liquid demand test device; Linear displacement sensor; 5c metal rod; 5d I-shaped piston; 6 brake wheel cylinder; 7 brake; 8 second liquid demand test device; 9 pressure sensor.
具体实施方式detailed description
实施例1：如图1所示，一种汽车制动系统的制动液需液量测试装置中的汽车液压制动系统包括：制动油液槽1、制动主缸2、制动踏板3、制动硬管4a、制动软管4b、制动轮缸6和制动器7；所述制动踏板3与制动主缸2相连；所述制动油液槽1通过管道与制动主缸2相连，制动主缸2通过所述制动硬管4a和制动软管4b与四个制动轮缸6相连；所述制动轮缸6与制动器7相连。Embodiment 1: As shown in Figure 1, a kind of automobile hydraulic brake system in the brake fluid requirement testing device of automobile brake system comprises: brake fluid tank 1, brake master cylinder 2, brake pedal 3. Brake hard pipe 4a, brake hose 4b, brake wheel cylinder 6 and brake 7; the brake pedal 3 is connected with the brake master cylinder 2; The master cylinder 2 is connected, and the brake master cylinder 2 is connected with four brake wheel cylinders 6 through the brake hard pipe 4a and the brake hose 4b; the brake wheel cylinders 6 are connected with the brake 7 .
在制动软管4b与制动轮缸6的接口处设置有第一需液量测试装置5；A first liquid demand testing device 5 is provided at the interface between the brake hose 4b and the brake wheel cylinder 6;
如图2所示，第一需液量测试装置5包括：空腔圆管5a、直线位移传感器5b、金属杆5c和工字型活塞5d。As shown in FIG. 2 , the first liquid demand test device 5 includes: a hollow tube 5a, a linear displacement sensor 5b, a metal rod 5c and an I-shaped piston 5d.
空腔圆管5a分别与制动软管4b与制动轮缸6的接口螺纹连接，空腔圆管5a的两个底面分别设置有进液口与出液口，制动液从进液口进入，出液口流出。The hollow round pipe 5a is threadedly connected with the interface of the brake hose 4b and the brake wheel cylinder 6 respectively, and the two bottom surfaces of the hollow round pipe 5a are respectively provided with a liquid inlet and a liquid outlet, and the brake fluid flows from the liquid inlet In, the liquid outlet flows out.
在空腔圆管5a内设置有工字型活塞5d，工字型活塞5d与空腔圆管5a过渡配合。工字型活塞5d为一两个活塞面通过一金属连接杆固定在一起的液压活塞，工字型活塞5d上有两个密封胶圈，分别套在两个活塞面上。密封胶圈有一定的弹性，既可以起到密封作用，防止液体流入工字型活塞5d两个活塞面之间的空间，也可以在液压作用上，促进工字型活塞5d移动。An I-shaped piston 5d is arranged inside the hollow tube 5a, and the I-shaped piston 5d transitionally fits with the cavity tube 5a. The I-shaped piston 5d is a hydraulic piston with two piston surfaces fixed together by a metal connecting rod. There are two sealing rubber rings on the I-shaped piston 5d, which are respectively sleeved on the two piston surfaces. The sealing rubber ring has a certain elasticity, which can not only play a sealing role, prevent liquid from flowing into the space between the two piston faces of the I-shaped piston 5d, but also promote the movement of the I-shaped piston 5d in terms of hydraulic pressure.
在工字型活塞5d的连接杆上垂直设置有金属杆5c，在金属杆5c的顶端设置有直线位移传感器5c；具体的说，直线位移传感器5b的滑块与金属杆5c的顶端固定，通过滑块在直线位移传感器5b移动改变电路中电信号，从而获取位移量。On the connecting rod of the I-shaped piston 5d, a metal rod 5c is vertically arranged, and a linear displacement sensor 5c is arranged on the top of the metal rod 5c; specifically, the slide block of the linear displacement sensor 5b is fixed with the top of the metal rod 5c. The movement of the slider on the linear displacement sensor 5b changes the electric signal in the circuit, thereby obtaining the displacement.
直线位移传感器5b，具体采用KTF直线位移传感器。其测量长度为75-3000mm，两端均有4mm缓冲行程，线性精度0.05％～0.04％FS，最大移动速度10m/s，正常工作温度60℃-150℃之间。The linear displacement sensor 5b is specifically a KTF linear displacement sensor. Its measuring length is 75-3000mm, both ends have a 4mm buffer stroke, the linear accuracy is 0.05%～0.04%FS, the maximum moving speed is 10m/s, and the normal working temperature is between 60°C and 150°C.
直线位移传感器5b与空腔圆管5a内壁固定连接。The linear displacement sensor 5b is fixedly connected with the inner wall of the hollow tube 5a.
在试验开始前，使空腔圆管5a内除工字型活塞5d两活塞面之间的空间外的空间充满制动液。当需液量测试装置工作时，人力脚踏制动踏板3，提供动力，推动制动主缸2的制动液流淌；先经过制动硬管4a，随后流过制动软管4b，紧接着通过空腔圆管5a的进液口流入空腔圆管5a内，从而在工字型活塞5d的活塞面上产生液压，推动工字型活塞5d运动，进而带动焊接在工字型活塞5d连接杆上的金属杆5c移动。由于直线位移传感器5b的滑块与金属杆5c的顶端固定在一起，带动直线位移传感器5b的滑块在直线位移传感器5b上产生位移量，从而获得制动轮缸6的第一需液量。Before the test starts, the space outside the space between the two piston faces of the I-shaped piston 5d in the hollow tube 5a is filled with brake fluid. When the liquid demand test device is working, the manpower pedals the brake pedal 3 to provide power, and the brake fluid in the brake master cylinder 2 is pushed to flow; it first passes through the brake hard pipe 4a, then flows through the brake hose 4b, and then tightens Then it flows into the hollow tube 5a through the liquid inlet of the cavity tube 5a, thereby generating hydraulic pressure on the piston surface of the I-shaped piston 5d, pushing the I-shaped piston 5d to move, and then driving the welding on the I-shaped piston 5d The metal rod 5c on the connecting rod moves. Since the slider of the linear displacement sensor 5b is fixed to the top of the metal rod 5c, the slider of the linear displacement sensor 5b is driven to generate a displacement on the linear displacement sensor 5b, thereby obtaining the first liquid demand of the brake wheel cylinder 6.
其中需液量V是利用式(1)计算获得：Among them, the liquid demand V is calculated by formula (1):
V＝S×L (1)V=S×L (1)
式(1)中，S表示工字型活塞5d的横截面积；L表示直线位移传感器5b的位移量。In formula (1), S represents the cross-sectional area of the I-shaped piston 5d; L represents the displacement of the linear displacement sensor 5b.
同时将空腔圆管5a内的制动液通过空腔圆管5a的出液口流入制动轮缸6中。通过液压组成动力，促使制动器7工作，利用物体间的摩擦作用，达到制动停车的目的。At the same time, the brake fluid in the hollow tube 5a flows into the brake wheel cylinder 6 through the liquid outlet of the cavity tube 5a. Composing power through hydraulic pressure, prompting the brake 7 to work, and using the friction between objects to achieve the purpose of braking and parking.
实施例2：如图3所示，一种汽车制动系统制动液需液量测试装置的应用，在制动硬管4a与制动软管4b之间再设置第二需液量测试装置8；Embodiment 2: As shown in Fig. 3, the application of a brake fluid requirement testing device for an automobile braking system, a second fluid requirement testing device is installed between the brake hard pipe 4a and the brake hose 4b 8;
通过实施例1的工作流程进行试验，获得第一需液量测试装置的第一需液量与第二需液量测试装置的第二需液量。Experiments were carried out through the working process of Example 1, and the first liquid demand of the first liquid demand test device and the second liquid demand of the second liquid demand test device were obtained.
对第一需液量测试装置所获得的第一需液量与第二需液量测试装置所获得的第二需液量进行比较，探究它们之间的拟合关系。The first liquid demand obtained by the first liquid demand test device is compared with the second liquid demand obtained by the second liquid demand test device, and the fitting relationship between them is explored.
由于制动软管4b是橡胶材料的，有一定的伸缩性。当制动液流经制动软管4b时，高温的制动液使得制动软管4b扩张，制动软管4b半径增大，从而制动软管4b管内容积增加，能够容纳更多的制动液，导致流入制动轮缸6的制动液减少，进行多次试验，进行数据分析，找出两者间的拟合关系。Since the brake hose 4b is made of rubber material, it has certain flexibility. When the brake fluid flows through the brake hose 4b, the high-temperature brake fluid causes the brake hose 4b to expand, and the radius of the brake hose 4b increases, so that the inner volume of the brake hose 4b increases and can accommodate more brake fluid. The brake fluid causes the brake fluid flowing into the brake wheel cylinder 6 to decrease. Multiple tests and data analysis are carried out to find out the fitting relationship between the two.
实施例3：如图4所示，第二种汽车制动系统制动液需液量测试装置的应用，是在需液量测试装置所在的制动硬管4a上设置一压力传感器9，由第一需液量测试装置5和压力传感器9构成制动轮缸6的P-V特性测试装置。Embodiment 3: as shown in Figure 4, the application of the second kind of automobile braking system brake fluid demand test device is to set a pressure sensor 9 on the brake hard pipe 4a where the liquid demand test device is located, by The first liquid demand testing device 5 and the pressure sensor 9 constitute a P-V characteristic testing device of the brake wheel cylinder 6 .
在试验开始前，使空腔圆管5a内除工字型活塞5d两活塞面之间的空间外的空间充满制动液。当需液量测试装置工作时，人力脚踏制动踏板3，提供动力，推动制动主缸2的制动液流淌。制动液先经过制动硬管4a，随后流经压力传感器9，此时压力传感器9获得制动硬管4a内的压强值P，由于管道是互通的，故制动轮缸6内的压强也是P。然后流经制动软管4b进入需要量测试装置5。制动液通过空腔圆管5a的进液口流入空腔圆管5a内，从而在工字型活塞5d的活塞面上产生液压，推动工字型活塞5d运动，进而带动焊接在工字型活塞5d连接杆上的金属杆5c移动。由于直线位移传感器5b的滑块与金属杆5c的顶端固定在一起，带动直线位移传感器5b的滑块在直线位移传感器5b上产生位移量，从而获得制动轮缸6的需液量；Before the test starts, the space outside the space between the two piston faces of the I-shaped piston 5d in the hollow tube 5a is filled with brake fluid. When the liquid demand testing device works, the manpower pedals the brake pedal 3 to provide power to promote the brake fluid of the brake master cylinder 2 to flow. The brake fluid first passes through the brake hard pipe 4a, and then flows through the pressure sensor 9. At this time, the pressure sensor 9 obtains the pressure value P in the brake hard pipe 4a. Since the pipes are interconnected, the pressure in the brake wheel cylinder 6 Also P. Then it flows through the brake hose 4b and enters the demand testing device 5 . The brake fluid flows into the hollow tube 5a through the liquid inlet of the cavity tube 5a, thereby generating hydraulic pressure on the piston surface of the I-shaped piston 5d, pushing the I-shaped piston 5d to move, and then driving the welding on the I-shaped piston. The metal rod 5c on the connecting rod of the piston 5d moves. Since the slider of the linear displacement sensor 5b is fixed to the top of the metal rod 5c, the slider of the linear displacement sensor 5b is driven to generate a displacement on the linear displacement sensor 5b, thereby obtaining the liquid demand of the brake wheel cylinder 6;
同时将空腔圆管5a内的制动液通过空腔圆管5a的出液口流入制动轮缸6中，通过液压作为动力，促使制动器7工作，利用物体间的摩擦作用，达到制动的目的。通过多次试验，获取大量数据，经过解析分析，从而获得制动轮缸的P-V特性。At the same time, the brake fluid in the hollow tube 5a flows into the brake wheel cylinder 6 through the liquid outlet of the cavity tube 5a, and the hydraulic pressure is used as power to make the brake 7 work, and the friction between objects is used to achieve braking. the goal of. Through multiple tests, a large amount of data is obtained, and after analytical analysis, the P-V characteristics of the brake wheel cylinder are obtained.
实施例4：第三种汽车制动系统制动液需液量测试装置的应用，根据制动踏板3的行程不同来测试第一需液量测试装置所产生的第一需液量；通过实施例的工作流程进行多次试验，制动踏板3的行程由小到大不断增加，记录下第一需液量测试装置所产生的第一需液量，等到一个临界点时，即使增加制动踏板3的行程，第一需液量测试装置所产生的第一需液量也不会变化。此时作用在制动踏板3上的力的效率最大，从而确定制动踏板3的最佳行程；以最佳行程产生最优制动力。Embodiment 4: the application of the third kind of automobile braking system brake fluid demand test device, test the first liquid demand produced by the first liquid demand test device according to the different strokes of the brake pedal 3; by implementing The working process of the example is tested many times, the stroke of the brake pedal 3 is continuously increased from small to large, and the first liquid demand generated by the first liquid demand test device is recorded. When a critical point is reached, even if the brake pedal is increased The stroke of the pedal 3 and the first liquid demand generated by the first liquid demand testing device will not change either. At this time, the efficiency of the force acting on the brake pedal 3 is the largest, thereby determining the optimal stroke of the brake pedal 3; the optimal braking force is generated with the optimal stroke.
以上公开的仅仅是发明的实施例，但并非用来限制其本身，任何熟悉本领域的技术人员，能根据其本质思想进行相关的设计、改进等，在不违背本发明精神的情况下，都应该落在本发明的保护范围内。What is disclosed above is only the embodiment of the invention, but it is not used to limit itself. Any person skilled in the art can carry out relevant design, improvement, etc. according to the essential idea, without violating the spirit of the present invention. Should fall within the protection scope of the present invention.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610054781.1ACN105547713B (en) | 2016-01-25 | 2016-01-25 | A kind of brake fluid of brake system of car needs liquid measure test device and its application |
| Application Number | Priority Date | Filing Date | Title |
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| CN201610054781.1ACN105547713B (en) | 2016-01-25 | 2016-01-25 | A kind of brake fluid of brake system of car needs liquid measure test device and its application |
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| CN105547713A CN105547713A (en) | 2016-05-04 |
| CN105547713Btrue CN105547713B (en) | 2017-11-10 |
| Application Number | Title | Priority Date | Filing Date |
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| CN201610054781.1AActiveCN105547713B (en) | 2016-01-25 | 2016-01-25 | A kind of brake fluid of brake system of car needs liquid measure test device and its application |
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