CN216969628U - Device for acquiring hydraulic and liquid demand data of automobile brake system - Google Patents
Device for acquiring hydraulic and liquid demand data of automobile brake system Download PDFInfo
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- CN216969628U CN216969628U CN202122407759.XU CN202122407759U CN216969628U CN 216969628 U CN216969628 U CN 216969628U CN 202122407759 U CN202122407759 U CN 202122407759U CN 216969628 U CN216969628 U CN 216969628U
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- solenoid valve
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- normally closed
- push rod
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Abstract
The utility model relates to a device for acquiring hydraulic pressure and liquid demand data of an automobile braking system, belonging to a data acquisition device of the automobile braking system. 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 the threaded connection in normally closed solenoid valve bottom, piston and the inside sliding connection of body, the top and the linear solenoid valve oil-out of normally closed of piston align, stop nut fixed connection is originally internal, motor drive rack push rod rear end portion, rack push rod middle part is passed stop nut, front end and piston rear end top connect, displacement measurement device is fixed on the body. The hydraulic pressure measuring device has the advantages that the structure is novel, the hydraulic pressure and the liquid volume needed are accurately measured by the displacement measuring device and the hydraulic sensor, the hydraulic sensor detects that the pressure is stable and the normally open valve is closed, the displacement measuring device measures the movement displacement, accurate data can be provided for automobile brake control, and therefore the brake performance and the brake comfort are improved.
Description
Technical Field
The utility model 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 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 utility model provides a device for acquiring hydraulic pressure and liquid demand data of an automobile braking system.
The technical scheme adopted by the utility model is as follows: the front end fixed connection oil pipe joint of body, the linear solenoid valve of normal close, a hydraulic sensor, the normally closed solenoid valve respectively with body fixed connection, and all communicate with oil pipe joint through the pipeline, exhaust screw and the bottom threaded connection of normally closed solenoid valve, piston and the inside sliding connection of body, the top and the linear solenoid valve oil-out of normally closed of piston align, stop nut fixed connection is originally internal, motor drive rack push rod rear end portion, stop nut is passed at rack push rod middle part, front end and piston rear end top joint, 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 a 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 propping manner.
The outside of the piston is sleeved with a leather cup.
The utility model has the advantages of novel structure, accurate measurement of the hydraulic pressure and the volume of the required liquid volume by utilizing the displacement measuring device and the hydraulic sensor, stable pressure detection and normally open valve closing of the hydraulic sensor, slow opening of the normally closed linear solenoid valve, outward movement of the piston pushed by the brake liquid, and measurement of the movement displacement by the displacement measuring device, and can provide accurate data for automobile brake control, thereby improving the brake performance and the brake comfort.
Drawings
FIG. 1 is a schematic diagram of a Hall displacement sensor used in the displacement measuring device of the present invention;
FIG. 2 is a schematic diagram of a displacement measuring device of the present invention employing a grating micrometer sensor;
FIG. 3 is a 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 amount needed 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 remove gas and liquid in a brake pipeline, then the normally closed electromagnetic valve 10 is closed, and the operation is repeated until the gas is exhausted completely; the second part is 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 the 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 following two cases are divided according to the displacement measuring device 4;
(1) when the displacement measuring device 4 employs a hall displacement sensor and a magnet:
the magnet 402 is fixed with the piston 7, the normally closed linear solenoid valve 8 is close to the bottom, 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 pit-shaped 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 piston 7 is pushed to the bottommost end by the push rod 1, 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 and stops, the 8-normally closed linear solenoid valve must be used in the pressure relief process, 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 liquid measurement is improved.
The brake pedal 21 is stepped on by a person, the electronic booster 20 or the vacuum booster is used for driving the brake master cylinder to amplify hydraulic pressure, the normally open valve 19 is used for locking the pressure, the brake fluid flows into the electronic stabilizing system ESC18, the brake oil pipe 17 and the brake calipers 15 to generate pressure, and the calipers clamp the brake disc; detect brake caliper hydraulic pressure through hydraulic sensor 9, the pressure release is opened to normally closed valve 8, 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 with piston cooperation area and measured displacement in the body 14 and needs liquid measure volume and hydraulic pressure relation.
Claims (6)
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 normal close, a hydraulic sensor, the normally closed solenoid valve respectively with body fixed connection, and all communicate with oil pipe joint through the pipeline, exhaust screw and the bottom threaded connection of normally closed solenoid valve, piston and the inside sliding connection of body, the top and the linear solenoid valve oil-out of normally closed of piston align, stop nut fixed connection is originally internal, motor drive rack push rod rear end portion, stop nut is passed at rack push rod middle part, front end and piston rear end top joint, displacement measurement device is fixed on the body.
2. The device for acquiring the hydraulic and fluid demand data of the automobile brake system according to claim 1, wherein the device comprises: 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 and fluid demand data of the automobile brake system according to claim 2, 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 and fluid demand data of the automobile brake system according to claim 1, wherein the device comprises: the displacement measuring device adopts a grating micrometer sensor, and a 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 propping manner.
6. The device for acquiring the hydraulic and fluid demand data of the automobile brake system according to claim 1, wherein the device comprises: the outside of the piston is sleeved with a leather cup.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122407759.XU CN216969628U (en) | 2021-09-30 | 2021-09-30 | Device for acquiring hydraulic and liquid demand data of automobile brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122407759.XU CN216969628U (en) | 2021-09-30 | 2021-09-30 | Device for acquiring hydraulic and liquid demand data of automobile brake system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216969628U true CN216969628U (en) | 2022-07-15 |
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ID=82343758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122407759.XU Active CN216969628U (en) | 2021-09-30 | 2021-09-30 | Device for acquiring hydraulic and liquid demand data of automobile brake system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216969628U (en) |
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2021
- 2021-09-30 CN CN202122407759.XU patent/CN216969628U/en active Active
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