CN213619710U - Active pressure regulating system of brake master cylinder - Google Patents
Active pressure regulating system of brake master cylinder Download PDFInfo
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- CN213619710U CN213619710U CN202022717704.4U CN202022717704U CN213619710U CN 213619710 U CN213619710 U CN 213619710U CN 202022717704 U CN202022717704 U CN 202022717704U CN 213619710 U CN213619710 U CN 213619710U
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- brake
- master cylinder
- piston
- control center
- cylinder
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Abstract
The utility model discloses an active pressure regulating system of a brake master cylinder, which is characterized by comprising a control center; the CAN information acquisition unit is used for acquiring vehicle state signals and transmitting the vehicle state signals to the control center; the brake pedal input unit is used for acquiring signals of a brake pedal input rod and transmitting the signals to the control center so as to reflect the braking intention of a driver; the brake unit comprises a liquid storage chamber, a brake master cylinder, a piston and a brake wheel cylinder, wherein the liquid storage chamber provides brake fluid for the brake master cylinder, and the piston in the brake master cylinder moves to press the brake fluid into the brake wheel cylinder to generate brake pressure required by the brake wheel cylinder; the brake wheel cylinder hydraulic pressure adjusting unit is used for pumping the brake fluid in the brake wheel cylinder back to the brake master cylinder; the driving mechanism is in transmission connection with the piston, the control center controls the driving piston to move to adjust the pressure of the brake main cylinder, the brake piston can be retracted when the pressure of the brake main cylinder is overlarge, so that the pressure of the brake main cylinder cannot be overlarge, and the brake piston can quickly react to build the pressure quickly when the pressure of the brake main cylinder is low.
Description
Technical Field
The utility model relates to a vehicle arresting gear, in particular to braking master cylinder initiative pressure regulating system.
Background
In the field of passenger automobiles, vehicle braking mainly relies on braking by hydraulically pushing caliper pistons on hubs, and braking hydraulic pressure is derived from a brake master cylinder. The main function of the brake master cylinder is to convert the mechanical force generated by the brake pedal into hydraulic pressure, and then the generated hydraulic pressure pushes the caliper piston on the hub to brake. When the brake locking phenomenon occurs on the automobile, the ABS can work to actively pump the brake fluid in the brake wheel cylinder to the brake master cylinder in a reverse mode.
Braking in conventional fuel vehicles is currently driven mainly by vacuum boosters, but in new energy vehicles and vehicles involving autonomous driving, vacuum boosters have not been able to meet the requirements of regenerative braking and active braking of the vehicle. The Intelligent Brake Booster (IBB) through electric braking can well meet the requirements of regenerative braking and active braking of the vehicle. However, the servo braking force of the Intelligent Brake Booster (IBB) of the electric brake is large, and when the ABS is activated, the pressure in the brake master cylinder is easily too high due to the brake fluid in the brake wheel cylinder entering the brake master cylinder.
SUMMERY OF THE UTILITY MODEL
In view of the technical problem who exists among the background art, the utility model aims at providing a brake master cylinder initiative pressure regulating system, can prevent the too high problem of brake master cylinder pressure.
In order to solve the technical problem, the utility model discloses a following technical scheme: a brake master cylinder active pressure regulating system is characterized by comprising
A control center;
the CAN information acquisition unit is used for acquiring vehicle state signals and transmitting the vehicle state signals to the control center;
the brake pedal input unit is used for acquiring signals of a brake pedal input rod and transmitting the signals to the control center so as to reflect the braking intention of a driver;
the brake unit comprises a liquid storage chamber, a brake master cylinder, a piston and a brake wheel cylinder, wherein the liquid storage chamber provides brake fluid for the brake master cylinder, and the piston in the brake master cylinder moves to press the brake fluid into the brake wheel cylinder to generate brake pressure required by the brake wheel cylinder;
the brake wheel cylinder hydraulic pressure adjusting unit is used for pumping the brake fluid in the brake wheel cylinder back to the brake master cylinder;
and the driving mechanism is in transmission connection with the piston and controls the driving piston to move by the control center so as to regulate the pressure of the brake master cylinder.
And the hydraulic adjusting unit of the brake wheel cylinder adopts ABS.
The CAN information acquisition unit comprises a vehicle CAN bus and a CAN transceiver, and the CAN transceiver converts CAN signals in the vehicle CAN bus into digital signals and sends the digital signals to the control center.
The CAN transceiver collects vehicle signals such as the pressure of a brake master cylinder, the pressure of a brake wheel cylinder, the activation state of the ABS and the like, and transmits the vehicle signals to the control center through a vehicle CAN bus.
The brake pedal input unit comprises a brake pedal input rod, a stroke sensor and a magnet, the brake pedal is pushed to enable the brake pedal input rod to move, the brake pedal input rod moves to enable the stroke sensor and the magnet to generate relative displacement, and the stroke sensor sends signals to the control center.
The driving mechanism comprises a motor and a push rod, the push rod is connected with the piston, and the motor rotates to drive the push rod to move.
The utility model has the advantages that: the control center can integrate and analyze the acquired vehicle state information and the driver braking intention information, and then control the driving mechanism to drive the piston to move to adjust the pressure of the brake master cylinder, so that the brake piston can retract when the pressure of the brake master cylinder is overlarge, the pressure of the brake master cylinder cannot be overlarge, and the brake piston can quickly react to build the pressure quickly when the pressure of the brake master cylinder is low.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
Referring to the drawings, the active pressure regulating system of the brake master cylinder comprises a control center 10, a CAN information acquisition unit 20, a brake pedal input unit 30, a brake unit 40, a driving mechanism 50 and a brake cylinder hydraulic pressure regulating unit 60, wherein the control center 10 CAN acquire vehicle state information and driver braking intention information for integrated analysis, and the control center 10 CAN adopt a single chip microcomputer. The CAN information acquisition unit 20 is used for acquiring vehicle state information, and the CAN information acquisition unit comprises a vehicle CAN bus and a CAN transceiver, wherein the CAN transceiver converts CAN signals in the vehicle CAN bus into digital signals and sends the digital signals to a control center, and the control center analyzes the received digital signals sent by the CAN transceiver and performs preliminary rationality judgment on the part of data. The CAN transceiver acquires vehicle states such as brake master cylinder pressure, brake wheel cylinder pressure, ABS activation state and the like, and sends signals to the control center through a vehicle CAN bus.
The brake pedal input unit 30 is used for acquiring a signal of a brake pedal input rod and transmitting the signal to the control center so as to reflect the braking intention of a driver, the brake pedal input unit 30 comprises a brake pedal input rod 31, a stroke sensor 32 and a magnet 33, the brake pedal 34 is pushed to enable the brake pedal input rod 31 to move, the brake pedal input rod 31 moves to enable the stroke sensor 32 and the magnet 33 to generate relative displacement, and the stroke sensor transmits the signal to the control center. In the embodiment, the travel sensor adopts a non-contact Hall sensor, so that the measurement is accurate and the brake pedal is not interfered.
The brake unit 40 includes a liquid storage chamber 41, a master cylinder 42, a piston 44 and a wheel cylinder 45, the liquid storage chamber 41 provides brake fluid for the master cylinder 42, the piston 44 in the master cylinder 42 moves to press the brake fluid into the wheel cylinder 45 to generate a brake pressure required by the wheel cylinder, a wheel cylinder hydraulic pressure adjusting unit 60 is used for pumping the brake fluid in the wheel cylinder back into the master cylinder, and the wheel cylinder hydraulic pressure adjusting unit 60 may adopt ABS or ESC. When the brake is not performed, the liquid storage chamber, the brake master cylinder, the brake wheel cylinder hydraulic pressure adjusting unit and the four brake wheel cylinders are in a communicated state; during braking, the piston is pushed forwards, the liquid storage chamber is isolated from the brake master cylinder, and the brake master cylinder, the brake wheel cylinder hydraulic pressure adjusting unit and the four brake wheel cylinders form a closed environment. The pressure required by the brake wheel cylinder for braking is generated by the piston compression space.
When the wheels are locked, the brake wheel cylinder hydraulic pressure adjusting unit starts to work, the brake fluid in the brake wheel cylinder is pumped back to the brake master cylinder, and the brake master cylinder generates high hydraulic pressure due to the increase of the brake fluid.
In order to prevent the pressure in the brake master cylinder from being too high or too low, the position of the piston needs to be adjusted, the piston 44 is in transmission connection with a driving mechanism 50, the driving mechanism 50 controls the driving piston 44 to move by the control center 10 to adjust the pressure of the brake master cylinder, in this embodiment, the driving mechanism 50 comprises a motor and a push rod 51, the push rod 51 is connected with the piston 44, and the motor rotates to drive the piston to move back and forth through the push rod.
The working principle is as follows: the CAN transceiver collects vehicle states such as brake master cylinder pressure, brake wheel cylinder pressure, ABS activation state and the like, and sends signals to the control center through a vehicle CAN bus; when the automobile is braked, a driver treads a brake pedal to drive a brake pedal input rod to move so that a magnet and a stroke sensor generate relative displacement, signals are transmitted to a control center, the control center calculates and analyzes information acquired by a CAN information acquisition unit and the brake pedal input unit and then controls a driving mechanism to drive a piston to move for braking, when the automobile is braked, ABS CAN work to actively pump brake fluid in a brake wheel cylinder back to a brake main cylinder, when the control center acquires a signal that the pressure of the brake main cylinder is too high, the control center drives a motor to drive the piston to move back so that the pressure of the brake main cylinder cannot be too high, and when the control center acquires a signal that the pressure of the brake main cylinder is low, the control center CAN quickly respond that the driving motor rotates to drive the piston to build pressure quickly.
Claims (6)
1. A brake master cylinder active pressure regulating system is characterized by comprising
A control center;
the CAN information acquisition unit is used for acquiring vehicle state signals and transmitting the vehicle state signals to the control center;
the brake pedal input unit is used for acquiring signals of a brake pedal input rod and transmitting the signals to the control center so as to reflect the braking intention of a driver;
the brake unit comprises a liquid storage chamber, a brake master cylinder, a piston and a brake wheel cylinder, wherein the liquid storage chamber provides brake fluid for the brake master cylinder, and the piston in the brake master cylinder moves to press the brake fluid into the brake wheel cylinder to generate brake pressure required by the brake wheel cylinder;
the brake wheel cylinder hydraulic pressure adjusting unit is used for pumping the brake fluid in the brake wheel cylinder back to the brake master cylinder;
and the driving mechanism is in transmission connection with the piston and controls the driving piston to move by the control center so as to regulate the pressure of the brake master cylinder.
2. The active pressure regulating system of a brake master cylinder according to claim 1, characterized in that the brake cylinder hydraulic pressure regulating unit employs ABS.
3. The active pressure regulating system of the brake master cylinder according to claim 2, wherein the CAN information acquisition unit comprises a vehicle CAN bus and a CAN transceiver, and the CAN transceiver converts CAN signals in the vehicle CAN bus into digital signals and sends the digital signals to the control center.
4. The active pressure regulating system of claim 3, wherein the CAN transceiver collects vehicle signals such as the pressure of the master cylinder, the pressure of the wheel cylinders and the activation state of the ABS, and transmits the vehicle signals to the control center through a vehicle CAN bus.
5. The active pressure regulating system of a brake master cylinder according to claim 1, wherein the brake pedal input unit comprises a brake pedal input rod, a stroke sensor and a magnet, the brake pedal input rod is moved by pushing the brake pedal, the relative displacement is generated between the stroke sensor and the magnet by moving the brake pedal input rod, and the stroke sensor sends a signal to the control center.
6. The active pressure regulating system of a brake master cylinder as claimed in claim 1, wherein the driving mechanism comprises a motor and a push rod, the push rod is connected with the piston, and the motor rotates to drive the push rod to move.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022717704.4U CN213619710U (en) | 2020-11-23 | 2020-11-23 | Active pressure regulating system of brake master cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022717704.4U CN213619710U (en) | 2020-11-23 | 2020-11-23 | Active pressure regulating system of brake master cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213619710U true CN213619710U (en) | 2021-07-06 |
Family
ID=76635674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022717704.4U Active CN213619710U (en) | 2020-11-23 | 2020-11-23 | Active pressure regulating system of brake master cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213619710U (en) |
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2020
- 2020-11-23 CN CN202022717704.4U patent/CN213619710U/en active Active
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