阅读说明：本技术 一种采集汽车制动系统液压与需液量数据的装置 (Device for acquiring hydraulic and liquid demand data of automobile brake system ) 是由 侯聪闻 柳恩芬 单国志 王维 宋巍 杨毅 刘振利 姜旭 石强 汤颖伟 高建军 于 2021-09-30 设计创作，主要内容包括：本发明涉及一种采集汽车制动系统液压与需液量数据的装置,属于汽车制动系统数据采集装置。本体的前端固定连接油管接头,常闭线性电磁阀、液压传感器、常闭电磁阀分别与本体固定连接,排气螺钉与常闭电磁阀底部螺纹连接,活塞与本体内部滑动连接,活塞的顶部与常闭线性电磁阀出油口对齐,限位螺母固定连接在本体内,电机驱动齿条推杆后端部,齿条推杆中部穿过限位螺母、前端与活塞后端顶接,位移测量装置固定本体上。优点是结构新颖,利用位移测量装置和液压传感器精确测量液压力与需液量体积,液压传感器检测到有压力平稳、常开阀关闭,位移测量装置测量移动位移,能给汽车制动控制提供准确的数据,从而提高制动性能和制动舒适性。(The invention relates to a device for acquiring hydraulic and liquid demand data of an automobile braking system, belonging to an automobile braking system data acquisition device. The front end fixed connection oil pipe joint of body, the linear solenoid valve of normally closed, hydraulic sensor, normally closed solenoid valve respectively with body fixed connection, exhaust screw and normally closed solenoid valve bottom threaded connection, piston and the inside sliding connection of body, the top of piston aligns with the linear solenoid valve oil-out of normally closed, stop nut fixed connection is in this internally, motor drive rack push rod rear end portion, rack push rod middle part is passed stop nut, front end and piston rear end top and is connect, displacement measurement device is fixed on the body. The advantage is novel structure, utilizes displacement measurement device and hydraulic pressure sensor precision measurement hydraulic pressure force and liquid demand volume, and hydraulic pressure sensor detects that pressure is steady, the normally open valve is closed, and displacement measurement device measures the displacement of removing, can provide accurate data for car brake control to improve brake performance and braking travelling comfort.)

1. The utility model provides a gather device of car braking system hydraulic pressure and liquid demand volume data which characterized in that: the front end fixed connection oil pipe joint of body, the linear solenoid valve of normally closed, hydraulic sensor, normally closed solenoid valve respectively with body fixed connection, and all connect the intercommunication through pipeline and oil pipe, exhaust screw and normally closed solenoid valve bottom threaded connection, piston and the inside sliding connection of body, the top of piston aligns with the linear solenoid valve oil-out of normally closed, stop nut fixed connection is originally internal, motor drive rack push rod rear end, stop nut is passed at rack push rod middle part, front end and piston rear end top connect, displacement measurement device is fixed on the body.

2. The device for acquiring the hydraulic pressure and liquid demand data of the automobile brake system according to claim 1, is characterized in that: the Hall displacement sensor of the displacement measuring device is fixedly connected to the body, and the magnet is sleeved on the piston and fixed with the piston.

3. The device for acquiring the hydraulic pressure and liquid demand data of the automobile brake system according to claim 2, is characterized in that: one end of the push rod is hemispherical.

4. The device for acquiring the hydraulic pressure and liquid demand data of the automobile brake system according to claim 3, wherein: the rear end of the piston is in a ball socket shape.

5. The device for acquiring the hydraulic pressure and liquid demand data of the automobile brake system according to claim 1, is characterized in that: the displacement measuring device adopts a grating micrometer sensor, and the hemispherical head of a push rod of the grating micrometer sensor is connected with the ball socket-shaped rear end of the piston in a jacking way.

6. The device for acquiring the hydraulic pressure and liquid demand data of the automobile brake system according to claim 1, is characterized in that: and a leather cup is sleeved outside the piston.

Technical Field

The invention belongs to a data acquisition device of an automobile brake system, which is applied to the measurement of hydraulic pressure and liquid volume of the automobile brake system.

Background

With the development of automobile technology and science and technology, people continuously improve the performance and the braking comfort of an automobile braking system, and in order to meet the development requirements, the accurate control of the braking system must be improved, the accurate control of pressure is realized, and the braking performance and the comfort are improved; meanwhile, brake pressure data are provided for functions such as ESP, unmanned driving, ACC and energy recovery, and accurate pressure control is achieved; and also provides oil amount calculation design data for the vacuum booster, the brake master cylinder and the brake system because a device capable of collecting hydraulic pressure and liquid amount data of the automobile brake system needs to be researched.

Disclosure of Invention

The invention provides a device for acquiring hydraulic and liquid demand data of an automobile braking system.

The technical scheme adopted by the invention is as follows: the front end fixed connection oil pipe joint of body, the linear solenoid valve of normally closed, hydraulic sensor, normally closed solenoid valve respectively with body fixed connection, and all connect the intercommunication through pipeline and oil pipe, exhaust screw and normally closed solenoid valve bottom threaded connection, piston and the inside sliding connection of body, the top of piston aligns with the linear solenoid valve oil-out of normally closed, stop nut fixed connection is originally internal, motor drive rack push rod rear end, stop nut is passed at rack push rod middle part, front end and piston rear end top connect, displacement measurement device is fixed on the body.

The Hall displacement sensor of the displacement measuring device is fixedly connected to the body, and the magnet is sleeved on the piston and fixed with the piston.

One end of the push rod is hemispherical.

The rear end of the piston is in a ball socket shape.

The displacement measuring device adopts a grating micrometer sensor, and the hemispherical head of a push rod of the grating micrometer sensor is connected with the ball socket-shaped rear end of the piston in a jacking way.

And a leather cup is sleeved outside the piston.

The invention has the advantages of novel structure, accurate measurement of hydraulic pressure and liquid volume demand by utilizing the displacement measuring device and the hydraulic sensor, stable pressure detection by the hydraulic sensor, closing of a normally open valve, slow opening of a normally closed linear electromagnetic valve, outward movement of a piston pushed by brake fluid, and measurement of movement displacement by the displacement measuring device, and can provide accurate data for automobile brake control, thereby improving brake performance and brake comfort.

Drawings

FIG. 1 is a schematic structural diagram of a displacement measuring device of the present invention using a Hall displacement sensor;

FIG. 2 is a schematic diagram of a displacement measuring device of the present invention employing a grating micrometer sensor;

FIG. 3 is a cross-sectional view A-A of FIG. 1;

fig. 4 is an application state diagram of the present invention.

Detailed Description

Front end fixed connection oil pipe joint 11 of body 14, normally closed linear solenoid valve 8, hydraulic sensor 9, normally closed solenoid valve 10 respectively with body 14 fixed connection, and all communicate with oil pipe joint 11 through pipeline 5, exhaust screw 13 and normally closed solenoid valve 10 bottom threaded connection, piston 7 and the inside sliding connection of body 14, the top of piston 7 aligns with the linear solenoid valve oil-out of normally closed, 3 fixed connection of stop nut is in body 14, 1 rear end of motor 2 drive push rod, stop nut 3 is passed at 1 middle part of push rod, front end and 7 rear end apical grafting of piston, displacement measurement device 4 is fixed on body 14.

The hall displacement sensor 401 of the displacement measuring device 4 is fixedly connected to the body 14, and the magnet 402 is sleeved on the piston 7 and fixed with the piston.

One end of the rack push rod 1 is hemispherical;

the rear end of the piston 7 is in a ball socket shape, so that eccentric wear caused by different shafts is prevented;

the displacement measuring device 4 adopts a grating micrometer sensor, and the hemispherical head of a push rod of the grating micrometer sensor is abutted with the spherical socket-shaped rear end of the piston 7 so as to prevent eccentric wear caused by non-coaxial;

the outer part of the piston 7 is sleeved with a leather cup 6.

The working principle is as follows:

referring to fig. 2, the present invention is connected with the air bleeding screw 16 of the brake 15 through the oil pipe joint 11 by the oil pipe 12, and the brake 15 is connected with the electronic stabilizing system ESC18, the normally open valve 19, the electronic booster 20 and the brake pedal 21 through the brake oil pipe 17.

Before PV relation measurement of hydraulic pressure (P) and volume (V) of liquid demand is carried out, the whole measuring device and a brake system must be exhausted, otherwise, the measurement is inaccurate, the exhaust is divided into two parts, the first part is the exhaust of the brake system before a normally closed linear electromagnetic valve 8, after a brake pedal 21 is stepped on, the normally closed electromagnetic valve 10 is opened, an exhaust screw 13 is opened to exhaust gas and liquid in a brake pipeline, then the normally closed electromagnetic valve 10 is closed, and the above operation is repeated until the gas is exhausted; the second part is a piston exhaust 7, after a brake pedal 21 is stepped on, a normally closed linear electromagnetic valve 8 is opened, brake fluid pushes the piston 7 to move outwards and move to a limit nut 3, then a push rod 1 is operated to push the piston 7 to move to the bottom towards the normally closed linear electromagnetic valve 8, meanwhile, the normally closed electromagnetic valve 10 and an exhaust screw 13 are opened to exhaust a gas-liquid mixture, the above operation is repeated until the gas is exhausted completely, and a leather cup 6 is used for keeping liquid tightness. The entire system must be kept free of gas prior to measurement.

And (3) displacement measurement: the displacement measuring device 4 is divided into the following two cases;

(1) when the displacement measuring device 4 employs a hall displacement sensor and a magnet:

the magnet 402 and the piston 7 are fixed together, the bottom of the magnet is close to the normally closed linear solenoid valve 8, the Hall displacement sensor 401 is arranged in the middle of the magnet and fixed on the body 14 at the initial position, the distance between the Hall displacement sensor and the magnet is 2.5mm, the length of the magnet is 4cm, the magnetic field intensity is 70-100mT, and the magnet is sleeved on the piston and fixed with the piston;

(2) when the displacement measuring device 4 adopts a grating micrometer sensor:

at the initial position, the push rod 1 is pushed, so that the bottom 7 of the piston is close to an oil outlet of the normally closed linear solenoid valve 8, and the damping of the push rod 1 and the body 14 is small; the hemispherical head of the push rod of the grating micrometer sensor is connected with the spherical rear end of the piston 7 in a propping manner;

the piston 7 is partially designed, the cylinder diameter of the piston is 1.2cm-1.6cm, and the stroke is 15 cm; a 6-leather cup is added on the 7-piston for sealing brake fluid, the whole 7-piston is very smooth in the process of moving left and right, and the damping is small; in order to improve the measurement accuracy, the top of the piston must be aligned with an oil outlet of the normally closed linear solenoid valve 8, during measurement, the push rod 1 pushes the piston 7 to the bottommost end, redundant brake fluid is discharged through the normally closed linear solenoid valve 8, the normally closed solenoid valve 10 and the exhaust screw 13, then the motor 2 rotates reversely, the push rod moves outwards to the position of the limiting nut 3 to stop, the 8-normally closed linear solenoid valve must be used during pressure relief, the hydraulic pressure is prevented from being too large, the piston of a main cylinder is abraded or clamped during pressure relief, and meanwhile the accuracy of the measured fluid is improved.

The brake pedal 21 is stepped by a person, the electronic booster 20 or the vacuum booster drives the brake master cylinder to amplify hydraulic pressure, the normally open valve 19 is used for locking the pressure, brake fluid flows into the electronic stabilizing system ESC18, the brake oil pipe 17 and the brake caliper 15 to generate pressure, and the caliper tightly clamps the brake disc; detect brake caliper hydraulic pressure through hydraulic sensor 9, normally closed valve 8 opens the pressure release, and brake fluid flows to piston 7 through linear solenoid valve, and piston 7 outwards moves, measures the displacement through hall displacement sensor or grating micrometer sensor, calculates liquid volume and hydraulic pressure relation that needs through the displacement of fitting up the square sum with the piston in the body 14 and measuring.