CN212332628U - Parking brake linear control system with high safety performance - Google Patents
Parking brake linear control system with high safety performance Download PDFInfo
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- CN212332628U CN212332628U CN202020928122.8U CN202020928122U CN212332628U CN 212332628 U CN212332628 U CN 212332628U CN 202020928122 U CN202020928122 U CN 202020928122U CN 212332628 U CN212332628 U CN 212332628U
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Abstract
The utility model provides a parking brake linear control system of high security performance, including the control valve, one end of control valve is linked together through pipeline and helping hand power supply, the other end of control valve is linked together through pipeline and stopper, the helping hand power supply with the one end that the control valve leaves is linked together through pipeline and oilcan, this braking system provides the linear control hydraulic braking control system of hydraulic power unit and replaces traditional vacuum booster and parking brake, realizes that the vehicle brakes under the state of driving and parking; the brake system only comprises a brake, a hydraulic power unit, a hydraulic control system and an electric control system, and is simple in structure, low in cost and small in occupied space.
Description
Technical Field
The utility model relates to a vehicle braking field especially relates to a parking brake linear control system of high security performance.
Background
The parking brake system of the motor vehicle is mainly characterized in that a mechanical parking brake handle is connected with a parking brake through a lever and an inhaul cable to lock a transmission shaft or a rear wheel to brake. At present, more and more automobiles start to adopt an electronic control parking system, temporary braking in the driving process and long-term braking after parking are integrated, and parking braking is realized in an electronic control mode. Vehicles used in certain special fields cannot use parking brakes in the form of cable and electromechanical calipers due to vehicle space or other factors.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the not enough of above-mentioned prior art, provide a parking brake linear control system of high security performance, can make unable installation and the vehicle that uses conventional parking brake realize long-time parking brake to it is with low costs than current braking system, occupation space is little.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a parking brake linear control system of high security performance, including the control valve, the one end of control valve is linked together through pipeline and helping hand power supply, the other end of control valve is linked together through pipeline and stopper, the helping hand power supply with the one end that the control valve leaves mutually is linked together through pipeline and oilcan.
Furthermore, the control valve comprises a brake switching hydraulic valve, a first pilot electromagnetic valve is arranged on a pipeline between a P port of the brake switching hydraulic valve and an Xa port of the brake switching hydraulic valve, and a second pilot electromagnetic valve is arranged on a pipeline between the Xa port of the brake switching hydraulic valve and the oilcan.
Furthermore, a first proportional solenoid valve is arranged on a pipeline between the port B of the brake switching hydraulic valve and the oil port of the brake, and a second proportional solenoid valve is arranged on a pipeline between the oil port of the brake and the oil can.
Furthermore, the boosting power source comprises a plunger pump and a high-pressure energy accumulator which are connected in series, wherein one end, away from the high-pressure energy accumulator, of the plunger pump is communicated with the oil can through a pipeline, and one end, away from the plunger pump, of the high-pressure energy accumulator is communicated with the brake switching hydraulic valve through a pipeline.
Furthermore, a first pressure sensor is arranged on a pipeline between an oil outlet of the high-pressure energy accumulator and an oil inlet of the brake switching hydraulic valve.
Further, a second pressure sensor is arranged between an oil outlet of the first proportional solenoid valve and an oil inlet of the brake.
Furthermore, an electromagnetic valve is arranged on a pipeline between the port A of the brake switching hydraulic valve and the oil inlet of the brake.
Furthermore, a spring is arranged on one side, away from the first pilot electromagnetic valve, of the valve core of the brake switching hydraulic valve.
The utility model has the advantages that: the brake system provides a line control hydraulic brake control system of the hydraulic power unit to replace a traditional vacuum booster and a parking brake, so that the vehicle is braked in the running and parking states; the brake system only comprises a brake, a hydraulic power unit, a hydraulic control system and an electric control system, and is simple in structure, low in cost and small in occupied space.
The brake system drives the valve core of the brake switching hydraulic valve to act by controlling a pilot electromagnetic valve in the hydraulic control system, so that the brake system is switched to a parking brake state. In the parking braking state, high-pressure brake fluid in the energy accumulator reaches a brake through a brake switching hydraulic valve, so that the vehicle can implement parking braking for a long time.
After the brake system control electromagnetic valve drives the brake switching hydraulic valve to switch the system to a service braking state, when the vehicle controller sends a required deceleration instruction to an electric control system of the brake system, the electric control system operates the proportional electromagnetic valve to release high-pressure brake fluid stored in a high-pressure accumulator of the power unit to the brake, then the electric control system of the brake system instructs the proportional electromagnetic valve on the hydraulic control unit to adjust the brake pressure provided by the high-pressure accumulator to hydraulic brake assistance with correct magnitude, and the brake pressure provided by the brake implements the specified brake deceleration on the vehicle until the vehicle reaches the deceleration required by the vehicle controller.
Drawings
FIG. 1 is a schematic structural view of a parking brake linear control system with high safety performance;
FIG. 2 is a schematic structural diagram of a driving state switched to a parking brake;
FIG. 3 is a schematic structural view of a parking brake hold;
FIG. 4 is a schematic structural diagram of the parking brake switched to the driving state;
FIG. 5 is a schematic structural diagram of the maintenance of the driving state;
FIG. 6 is a schematic structural view of brake boosting under a driving state;
FIG. 7 is a schematic structural view of a brake hold in a driving state;
FIG. 8 is a schematic diagram of a brake pressure reduction in a driving state.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
As shown in fig. 1, the parking brake linear control system with high safety performance comprises a control valve, wherein one end of the control valve is communicated with a power-assisted power source through a pipeline, the other end of the control valve is communicated with a brake 7 through a pipeline, and one end, away from the control valve, of the power-assisted power source is communicated with an oil can 6 through a pipeline.
The control valve comprises a brake switching hydraulic valve 5, a first pilot electromagnetic valve 101 is arranged on a pipeline between a P port of the brake switching hydraulic valve 5 and an Xa port of the brake switching hydraulic valve 5, and a second pilot electromagnetic valve 102 is arranged on a pipeline between the Xa port of the brake switching hydraulic valve 5 and the oilcan 6.
A first proportional solenoid valve 201 is arranged on a pipeline between the port B of the brake switching hydraulic valve 5 and the oil port of the brake 7, and a second proportional solenoid valve 202 is arranged on a pipeline between the oil port of the brake 7 and the oil can 6.
The boosting power source comprises a plunger pump 1 and a high-pressure energy accumulator 2 which are connected in series, wherein one end, away from the high-pressure energy accumulator 2, of the plunger pump 1 is communicated with the oil can 6 through a pipeline, and one end, away from the plunger pump 1, of the high-pressure energy accumulator 2 is communicated with the brake switching hydraulic valve 5 through a pipeline.
And a first pressure sensor 3 is arranged on a pipeline between an oil outlet of the high-pressure energy accumulator 2 and an oil inlet of the brake switching hydraulic valve 5.
A second pressure sensor 4 is arranged between an oil outlet of the first proportional solenoid valve 201 and an oil inlet of the brake 7.
And an electromagnetic valve 10 is arranged on a pipeline between the port A of the brake switching hydraulic valve 5 and the oil inlet of the brake 7.
Wherein, plunger pump 1: the brake fluid is pumped from the oil can 6, is boosted and is stored in the high-pressure energy storage device 2;
high-voltage energy storage 2: the high-pressure brake fluid is used for storing high-pressure brake fluid required by braking;
first pressure sensor 3: the pressure sensor is used for measuring the pressure of brake fluid in the high-pressure energy storage 2, and the electric control system controls the starting and stopping of the plunger pump 1 through the pressure value collected by the first pressure sensor 3;
the second pressure sensor 4: for measuring the operating pressure of the brake 7, the electrical control system controls the braking deceleration of the vehicle (i.e. the required braking pressure) by means of the pressure value picked up by the second pressure sensor 4;
brake switching hydraulic valve 5: the hydraulic control system is used for switching and controlling the driving and parking braking states of the hydraulic control system;
an oil can 6: storing the brake fluid in the system;
the brake 7: the braking force for driving and parking the vehicle is provided;
the electromagnetic valve 10: the brake switching hydraulic valve works during driving and braking and is used for protecting the working stability of the brake switching hydraulic valve 5;
first pilot solenoid valve 101: the brake switching hydraulic valve is used for controlling the switching of the running and parking brake states of the brake switching hydraulic valve 5;
second pilot solenoid valve 102: the brake switching hydraulic valve is used for controlling the switching of the running and parking brake states of the brake switching hydraulic valve 5;
first proportional solenoid valve 201: when the brake works during service braking, the electric control system adjusts the rising speed of the internal pressure of the brake by controlling the opening degree of a valve port of the first proportional solenoid valve 201;
second proportional solenoid valve 202: when the brake works in service braking, the electric control system adjusts the pressure reduction speed in the brake by controlling the valve port opening of the second proportional solenoid valve 202.
And a spring is arranged on one side of the valve core of the brake switching hydraulic valve, which is away from the first pilot electromagnetic valve.
The spring 501 can keep the brake switching hydraulic valve 5 at the position PB, and can reduce the number of pilot electromagnetic valves, so that the system has a simple structure and occupies a small space.
The brake is internally provided with a brake piston and is used for providing the braking force for driving and parking for the vehicle;
the hydraulic power unit comprises a plunger pump driven by a motor and a high-pressure energy accumulator and is used for providing and storing high-pressure brake fluid for the brake system;
the hydraulic control system comprises a pressure sensor for acquiring the pressure of a system pipeline, a switching hydraulic valve for driving and parking braking, a pilot control valve and an electromagnetic valve for controlling the driving braking, can control the hydraulic control system to switch back and forth between a driving state and a parking braking state, and enables the braking system to brake in the driving state and the parking state respectively;
the electric control system controls the start and stop of the work of the hydraulic power unit through the collected pressure sensor signal; the solenoid valve is controlled to open or close, thereby implementing parking braking and service braking.
Referring to fig. 2, the driving state is switched to the parking brake:
the first pilot electromagnetic valve 101 is electrically operated to increase the pressure of the Xa port of the brake switching hydraulic valve 5, and the hydraulic pressure of the first pilot electromagnetic valve causes the valve core of the brake switching hydraulic valve 5 to overcome the pre-pressure of the spring 501, so that the brake switching hydraulic valve 5 is switched to the PA position communication state, and the high-pressure brake fluid in the high-pressure energy accumulator 2 sequentially flows through the P port of the brake switching hydraulic valve 5 and the a port of the brake switching hydraulic valve 5, flows into the electromagnetic valve 10 through a pipeline, and finally reaches the brake 7.
Referring to FIG. 3, park brake hold
After the switching action is finished, the first pilot electromagnetic valve 101 is de-energized, the pressure of the Xa port of the brake switching hydraulic valve 5 is kept with a pipeline (with throttling control) communicated with the A port of the brake switching hydraulic valve 5, so that the brake hydraulic valve 5 can continuously keep the PA position communicated state, and the parking brake is kept.
Referring to FIG. 4, the parking brake is switched to the driving state
The second pilot electromagnetic valve 102 is electrically operated to reduce the pressure at the Xa port of the brake switching hydraulic valve 5, and the brake switching hydraulic valve 5 is switched to a PB communication state under the action of the pre-pressure force of the spring 501 on the spool of the brake switching hydraulic valve 5, so that the high-pressure brake fluid in the high-pressure accumulator 2 sequentially flows through the P port of the brake switching hydraulic valve 5 and the B port of the brake switching hydraulic valve 5 and then reaches the inlet of the first proportional electromagnetic valve 201 through a pipeline.
Referring to FIG. 5, the driving state is maintained
After the switching action is finished, the second pilot electromagnetic valve 102 is de-energized, the low pressure of the Xa port of the brake switching hydraulic valve 5 is continuously maintained, and the brake switching hydraulic valve 5 can continuously maintain the PB bit under the action of the pre-pressure of the spring 501 of the valve core of the brake switching hydraulic valve 5, so that the driving state is maintained.
Referring to FIG. 6, the brake boosting is performed in the driving state
In a service braking state, the first proportional solenoid valve 201 is electrified, high-pressure brake fluid finally enters the brake 7 to brake the whole vehicle through the first proportional solenoid valve 201, at the moment, the second pressure sensor 4 sends the collected brake pressure value to the electric control system to control the valve port opening of the first proportional solenoid valve 201, the solenoid valve 10 is electrified, the communication between the brake 7 and the Xa port of the brake switching hydraulic valve 5 is cut off, and the misoperation of the brake switching hydraulic valve 5 is prevented.
Referring to FIG. 7, brake hold is applied in a driving state
In the service braking state, the electromagnetic valve 10 is electrified, the communication between the brake 7 and the Xa oil port of the brake switching hydraulic valve 5 is cut off, the brake switching hydraulic valve 5 is prevented from misoperation, and meanwhile, the brake fluid in the brake 7 is sealed by the electromagnetic valve 10, the first proportional electromagnetic valve 201 and the second proportional electromagnetic valve 202, so that the pressure in the brake 7 is kept.
Referring to FIG. 8, braking step-down is performed in a driving state
In the service braking state, the second proportional solenoid valve 202 is energized, and the high-pressure brake fluid in the brake 7 flows back to the mailbox through the second proportional solenoid valve 202, so that the pressure in the brake is reduced.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (8)
1. The utility model provides a parking brake line accuse system of high security performance which characterized in that: the hydraulic brake system comprises a control valve, wherein one end of the control valve is communicated with a power-assisted power source through a pipeline, the other end of the control valve is communicated with a brake (7) through a pipeline, and the end, away from the control valve, of the power-assisted power source is communicated with an oil can (6) through a pipeline.
2. The high-safety parking brake line control system according to claim 1, characterized in that: the control valve comprises a brake switching hydraulic valve (5), a first pilot electromagnetic valve (101) is arranged on a pipeline between a P port of the brake switching hydraulic valve (5) and an Xa port of the brake switching hydraulic valve (5), and a second pilot electromagnetic valve (102) is arranged on a pipeline between the Xa port of the brake switching hydraulic valve (5) and the oilcan (6).
3. The high-safety parking brake line control system according to claim 2, characterized in that: a first proportional solenoid valve (201) is arranged on a pipeline between an opening B of the brake switching hydraulic valve (5) and an oil opening of the brake (7), and a second proportional solenoid valve (202) is arranged on a pipeline between the oil opening of the brake (7) and the oil can (6).
4. The high-safety parking brake line control system according to claim 3, characterized in that: the boosting power source comprises a plunger pump (1) and a high-pressure energy storage device (2) which are connected in series, wherein the plunger pump (1) and one end, away from the high-pressure energy storage device (2), of the plunger pump are communicated with the oil can (6) through a pipeline, and the high-pressure energy storage device (2) and one end, away from the plunger pump (1), of the plunger pump are communicated with the brake switching hydraulic valve (5) through a pipeline.
5. The high-safety parking brake line control system according to claim 4, characterized in that: and a first pressure sensor (3) is arranged on a pipeline between an oil outlet of the high-pressure energy accumulator (2) and an oil inlet of the brake switching hydraulic valve (5).
6. The high-safety parking brake line control system according to claim 5, characterized in that: and a second pressure sensor (4) is arranged between an oil outlet of the first proportional solenoid valve (201) and an oil inlet of the brake (7).
7. The high-safety parking brake line control system according to claim 6, characterized in that: and an electromagnetic valve (10) is arranged on a pipeline between the port A of the brake switching hydraulic valve (5) and the oil inlet of the brake (7).
8. The high-safety parking brake line control system according to claim 2, characterized in that: and a spring (501) is arranged on one side, away from the first pilot electromagnetic valve (101), of the valve core of the brake switching hydraulic valve (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020928122.8U CN212332628U (en) | 2020-05-28 | 2020-05-28 | Parking brake linear control system with high safety performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020928122.8U CN212332628U (en) | 2020-05-28 | 2020-05-28 | Parking brake linear control system with high safety performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212332628U true CN212332628U (en) | 2021-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020928122.8U Active CN212332628U (en) | 2020-05-28 | 2020-05-28 | Parking brake linear control system with high safety performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212332628U (en) |
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2020
- 2020-05-28 CN CN202020928122.8U patent/CN212332628U/en active Active
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