CN110271525B - Integrated electromagnetic power-assisted brake and braking method thereof - Google Patents
Integrated electromagnetic power-assisted brake and braking method thereof Download PDFInfo
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- CN110271525B CN110271525B CN201910684633.1A CN201910684633A CN110271525B CN 110271525 B CN110271525 B CN 110271525B CN 201910684633 A CN201910684633 A CN 201910684633A CN 110271525 B CN110271525 B CN 110271525B
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- valve body
- input rod
- tubular
- control unit
- electronic control
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000006073 displacement reaction Methods 0.000 claims abstract description 45
- 238000007789 sealing Methods 0.000 claims description 4
- 230000000994 depressogenic effect Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 210000004954 endothelial membrane Anatomy 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/745—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
Abstract
The invention provides an integrated electromagnetic booster brake and a braking method thereof, comprising a pedal connecting piece, an input rod, a booster valve body, a tubular electromagnet, a displacement sensor, an electronic control unit and a brake master cylinder; the pedal connecting piece is coupled with the input rod; the displacement sensor, the electronic control unit and the tubular electromagnet are all positioned in the booster valve body, and the left end of the input rod extends into a push rod of the tubular electromagnet in the booster valve body; the displacement sensor is fixedly arranged in the booster valve body, and the input rod is arranged on the measuring rod of the displacement sensor; the displacement sensor is connected with the electronic control unit, the electronic control unit is connected with the power supply, the electronic control unit can control the input current of the tubular electromagnet, and the magnetic field force generated by the tubular electromagnet can drive the input rod to move towards the valve body of the booster; the input lever may transmit a braking force to the master cylinder. The invention can assist the braking by the magnetic field force generated by the electromagnet, and has good assisting efficiency and stability.
Description
Technical Field
The invention belongs to the technical field of vehicle brakes, and particularly relates to an integrated electromagnetic power-assisted brake and a braking method thereof.
Background
In many conventional brake boosters for vehicles, a vacuum booster is used, which is a member that increases the force applied to a pedal by a driver using vacuum (negative pressure), and is generally installed between a brake pedal and a brake master cylinder. The vacuum booster relies on the intake manifold behind the throttle of the engine or a vane vacuum pump driven by a cam shaft to obtain vacuum-assisted negative pressure. This device has the following two problems: 1. the vacuum pump and the air intake manifold behind the engine throttle valve provide limited negative pressure, only three to four braking assistance can be provided, and the more the braking times are, the smaller the assistance is, the repeated work of the vacuum pump is required, and meanwhile, the increase of the vacuum pump brings no small pressure to the crowded engine room. 2. The pipeline connected between the vacuum pump and the vacuum booster is easy to leak air, so that potential safety hazards are brought to daily use. 3. The strength of the endothelial membrane supporting plate of the vacuum booster is insufficient, deformation can be generated during working, the endothelial membrane supporting plate cannot return normally, and vehicle running retardation can be caused under extreme conditions, so that the vehicle cannot run normally. Therefore, the existing brake booster device cannot be well utilized by people, the market is limited, and the practicability is poor.
Disclosure of Invention
The invention aims to provide an integrated electromagnetic booster brake and a braking method thereof, which replace a vacuum brake booster and boost braking by magnetic field force generated by an electromagnet so as to improve boosting efficiency and stability.
The invention provides the following technical scheme:
An integrated electromagnetic booster brake comprises a pedal connecting piece, an input rod, a booster valve body, a tubular electromagnet, a displacement sensor, an electronic control unit and a brake master cylinder; the brake pedal is connected with a pedal connecting piece through a pin shaft, and the pedal connecting piece is coupled and connected with the right end of the input rod; the displacement sensor, the electronic control unit and the tubular electromagnet are all positioned in the booster valve body, and the left end of the input rod extends into the booster valve body and is fixedly connected with the push rod of the tubular electromagnet; the displacement sensor is fixedly arranged in the booster valve body, and the input rod is arranged on the measuring rod of the displacement sensor; the displacement sensor is connected with the input end of the electronic control unit, the output end of the electronic control unit is connected with the power supply, the electronic control unit can control the input current of the tubular electromagnet, and the magnetic field force generated by the tubular electromagnet can drive the input rod to move towards the valve body of the booster; the booster valve body is connected with the brake master cylinder, and the input rod can transmit braking force to the brake master cylinder.
Preferably, the left end of the tubular electromagnet is provided with a tubular column, the tubular column is fixed on the left side wall of the booster valve body, the tubular column is provided with a return spring, and the return spring is compressed and then abuts against the end part of the tubular electromagnet.
Preferably, a cable plug-in port is arranged on the booster valve body, and cables respectively connected with the tubular electromagnet, the displacement sensor and the electronic control unit are arranged inside the booster valve body.
Preferably, a rubber sheath is arranged at the joint of the right end of the booster valve body and the input rod, and the rubber sheath is in sealing connection with the left side of the booster valve body and the input rod.
Preferably, the rubber sheath is a collapsible, telescoping sheath.
The braking method of the integrated electromagnetic booster brake comprises the following steps of:
(1) The driver presses the brake pedal to electrify the coil of the tubular electromagnet, and meanwhile, the displacement sensor collects the stroke of the input rod, converts a displacement stroke signal into a displacement electric signal and sends the displacement electric signal to the electronic control unit;
(2) The electronic control unit controls the input current of the tubular electromagnet according to the received displacement electric signal, so as to control the electromagnetic force generated by the tubular electromagnet;
(3) The electromagnetic force generated by the tubular electromagnet applies a pulling force to the input rod, so that the input rod moves towards the direction of the booster valve body;
(4) The electromagnetic force generated by the tubular electromagnet and the pushing pressure of the input rod are simultaneously and jointly converted into braking hydraulic pressure in the braking master cylinder, so that braking is realized.
Preferably, a tubular column is arranged at the left end of the tubular electromagnet, and a return spring is arranged on the tubular column; when the braking is finished, the driver releases the brake pedal, the tubular electromagnet coil is immediately powered off, the electromagnetic force disappears, and the input rod is restored to the initial position under the action of the return spring.
Preferably, in step (1), when the brake pedal is depressed by the driver in the event of a power failure or when the electronic control unit fails, a mechanical force is applied to the brake pedal, and an input rod coupled to the brake pedal transmits the mechanical force to the master cylinder, which is converted into a brake hydraulic pressure, thereby performing braking.
The beneficial effects of the invention are as follows:
When the brake pedal is stepped on, the tubular electromagnet is electrified to generate electromagnetic force, the displacement sensor acquires the stroke of the brake pedal and sends the stroke to the electronic control unit, the electronic control unit calculates the current intensity required by the tubular electromagnet to generate magnetic field force according to the displacement of the brake pedal, the electrified tubular electromagnet generates a magnetic field with a certain intensity, an input rod coupled to the brake pedal receives the magnetic field force in the direction of a booster valve body in the magnetic field and moves in the direction of the booster valve body, and the electromagnetic force generated by the tubular electromagnet and the input pressure of the input rod are jointly converted into brake hydraulic pressure in the brake master cylinder, so that braking is realized, and the braking efficiency and the stability are good. The invention can replace a vacuum booster to carry out braking assistance, greatly reduces the working time of generating negative pressure by using a vacuum pump to exhaust air, optimizes the mechanical structure of a braking assistance mechanism, obviously reduces the number of hardware and reasonably utilizes the space of an engine compartment occupied by the braking assistance mechanism.
The invention can quickly respond to the braking intention of a driver, provides the assistance selection of different driving modes and shorter braking distance, is suitable for auxiliary driving modes such as self-adaptive cruising, automatic emergency braking and the like, and meets the future use requirements. Under the condition of power failure, the invention can directly provide non-boosting braking and is safe and flexible to use.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of the structure of the present invention;
Marked in the figure as: 1. a pedal connection; 2. an input lever; 3. a booster valve body; 4. a tubular electromagnet; 5. a displacement sensor; 6. an electronic control unit; 7. a brake master cylinder; 8. a pin shaft; 9. a torsion spring; 10. a push rod; 11. a tubular column; 12. a return spring; 13. a limit ring; 14. a cable plug port; 15. and a rubber sheath.
Detailed Description
As shown in fig. 1, an integrated electromagnetic booster brake includes a pedal connector 1, an input rod 2, a booster valve body 3, a tubular electromagnet 4, a displacement sensor 5, an electronic control unit 6, and a master cylinder 7. The brake pedal is connected with the pedal connecting piece 1 through a rotatable pin shaft 8 and a torsion spring 9, wherein the torsion spring 9 is arranged on the pin shaft 8, and the torsion spring 9 can reset the braking rotation angle of the brake pedal. The pedal connecting piece 1 is coupled with the right end of the input rod 2, the nut fastening torque between the pedal connecting piece 1 and the input rod is 15.7-21.6N.m, the input rod 2 is coupled with the pedal connecting piece 1, road feel can be well transferred, and the pedal connecting piece can be timely perceived by a driver when a braking system is declined. The displacement sensor 5, the electronic control unit 6 and the tubular electromagnet 4 are all positioned in the booster valve body 3, the tubular electromagnet 4 is a push rod type electromagnet, in a free state, the push rod 10 is not contacted with a fixed iron core in the tubular electromagnet, and the tubular electromagnet is not electrified. The left end of the input rod 2 stretches into a push rod 10 fixedly connected with the tubular electromagnet in the booster valve body, and when a brake pedal is stepped on, the push rod 10 contacts the fixed iron core to enable the tubular electromagnet 4 to be electrified so as to generate magnetic field force. The displacement sensor 5 is fixedly arranged in the booster valve body 3, the input rod 2 is movably arranged on a measuring rod of the displacement sensor 5, the displacement sensor 5 is connected with the input end of the electronic control unit 6, the displacement sensor 5 collects the stroke of the brake pedal through the input rod 2 and sends the stroke to the electronic control unit 6, the output end of the electronic control unit 6 is connected with a power supply, the input current of the tubular electromagnet 4 is controlled, the electronic control unit 6 calculates the current intensity required by the tubular electromagnet 4 to generate magnetic field force according to the displacement of the brake pedal, the magnetic field force of the tubular electromagnet is further changed, if the displacement is large, the input current intensity is reduced, and if the displacement is small, the input current intensity is increased. The input rod 2 receives a magnetic force in the direction of the booster valve body 3 and moves in the direction of the booster valve body 3, the booster valve body 3 is connected to the master cylinder 7, and the input rod 2 can transmit a braking force to the master cylinder 7. The electromagnetic force generated by the tubular electromagnet 4 and the braking force of the input rod 2 are jointly converted into braking hydraulic pressure in the braking master cylinder 7, so that braking is realized.
The left end welded fastening of tubular electro-magnet 4 has tubular column 11, and tubular column 11 fixed mounting is on the left side wall of booster valve body 3, installs reset spring 12 on the tubular column 11, and reset spring 12's left end is spacing by spacing collar 13 on tubular column 11, and reset spring 12 is compressed and the left end of butt pipe formula electro-magnet 4 during the braking. When the braking is finished, the driver releases the brake pedal, the tubular electromagnet 4 is immediately de-energized, the electromagnetic force disappears, and the input rod 2 is restored to the original position under the action of the return spring 12.
The booster valve body 3 is provided with a cable plug-in port 14, cables respectively connected with the tubular electromagnet 4, the displacement sensor 5 and the electronic control unit 6 are arranged inside the booster valve body 3, the end parts of the cables are integrated on the cable plug-in port 14, and the cables and the cable plug-in port 14 are connected with an external power supply wire.
A rubber sheath 15 is arranged at the joint of the right end of the booster valve body 3 and the input rod 2, and the rubber sheath 15 is in sealing connection with the left side of the booster valve body 3 and the input rod 2. The rubber sheath 15 is a collapsible, retractable sheath. The rubber sheath 15 can stretch and retract along with the horizontal movement of the input rod 2, so that the sealing connection between the input rod 2 and the booster valve body 3 is ensured, and the input rod 2 is buffered and crashproof.
The braking method of the invention is as follows:
1. Under the normal state, a booster braking mode is adopted:
(1) The driver presses the brake pedal to electrify the coil of the tubular electromagnet 4, and meanwhile, the displacement sensor 5 collects the stroke of the input rod 2, converts a displacement stroke signal into a displacement electric signal and sends the displacement electric signal to the electronic control unit 6;
(2) The electronic control unit 6 controls the input current of the tubular electromagnet 4 according to the received displacement electric signal, and further controls the electromagnetic force generated by the tubular electromagnet 4;
(3) The electromagnetic force generated by the tubular electromagnet 4 applies a pulling force to the input rod 2, so that the input rod 2 moves towards the booster valve body 3;
(4) The electromagnetic force generated by the tubular electromagnet 4 and the thrust of the motion of the input rod 2 are simultaneously and jointly converted into braking hydraulic pressure in the braking master cylinder 7, so that braking is realized.
(5) When the brake is finished, the driver releases the brake pedal, the coil in the tubular electromagnet 4 is immediately powered off, the electromagnetic force disappears, and the input rod 2 is restored to the initial position under the action of the return spring 12.
2. Under the condition of power failure or when the electronic control unit fails, the following non-boosting braking modes are automatically switched:
The driver depresses the brake pedal, applies a mechanical force to the brake pedal, and an input rod 2 coupled to the brake pedal transmits the mechanical force to a master cylinder 7, and converts the mechanical force into a brake fluid pressure to brake. After the braking is finished, the return spring 12 returns the input rod 2.
The two working modes are automatically switched and do not conflict with each other.
The foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. An integrated electromagnetic booster brake is characterized by comprising a pedal connecting piece, an input rod, a booster valve body, a tubular electromagnet, a displacement sensor, an electronic control unit and a brake master cylinder; the brake pedal is connected with the pedal connecting piece through a pin shaft and a torsion spring, and the pedal connecting piece is coupled and connected with the right end of the input rod; the displacement sensor, the electronic control unit and the tubular electromagnet are all positioned in the booster valve body, and the left end of the input rod extends into the booster valve body and is fixedly connected with a push rod of the tubular electromagnet; the displacement sensor is fixedly arranged in the booster valve body, and the input rod is movably arranged on a measuring rod of the displacement sensor; the displacement sensor is connected with the input end of the electronic control unit, the output end of the electronic control unit is connected with a power supply, the electronic control unit can control the input current of the tubular electromagnet, and the magnetic field force generated by the tubular electromagnet can drive the input rod to move towards the direction of the booster valve body; the booster valve body is connected with the brake master cylinder, and the input rod can transmit braking force to the brake master cylinder;
A tubular column is arranged at the left end of the tubular electromagnet, the tubular column is fixed on the side wall of the booster valve body, a return spring is arranged on the tubular column, and the return spring is pressed and then abuts against the end part of the tubular electromagnet;
the booster valve body is provided with a cable plug-in port, and the inside of the booster valve body is provided with a cable respectively connected with the tubular electromagnet, the displacement sensor and the electronic control unit;
A rubber sheath is arranged at the joint of the right end of the booster valve body and the input rod, and the rubber sheath is in sealing connection with the left side of the booster valve body and the input rod;
The rubber sheath is a folding telescopic sheath.
2. A braking method of an integrated electromagnetic booster brake as defined in claim 1, comprising the steps of:
(1) The driver presses a brake pedal to electrify a coil of the tubular electromagnet, and meanwhile, the displacement sensor collects the stroke of the input rod, converts a displacement stroke signal into a displacement electric signal and sends the displacement electric signal to the electronic control unit;
(2) The electronic control unit controls the input current of the tubular electromagnet according to the received displacement electric signal, so as to control the electromagnetic force generated by the tubular electromagnet;
(3) The electromagnetic force generated by the tubular electromagnet applies a pulling force to the input rod, so that the input rod moves towards the booster valve body;
(4) The electromagnetic force generated by the tubular electromagnet and the thrust of the motion of the input rod are simultaneously and jointly converted into braking hydraulic pressure in the braking master cylinder, so that braking is realized.
3. The braking method of the integrated electromagnetic booster brake according to claim 2, wherein a pipe column is installed at the left end of the tubular electromagnet, and a return spring is installed on the pipe column; when the braking is finished, the driver releases the brake pedal, the coil of the tubular electromagnet is immediately powered off, the electromagnetic force disappears, and the input rod is restored to the initial position under the action of the return spring.
4. A braking method of an integrated electromagnetic assist brake as set forth in claim 3, wherein in the step (1), when the brake pedal is depressed by a driver in the event of a power failure or when the electronic control unit fails, a mechanical force is applied to the brake pedal, and the input rod coupled to the brake pedal transmits the mechanical force to the master cylinder, and is converted into a brake fluid pressure, thereby performing braking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910684633.1A CN110271525B (en) | 2019-07-26 | 2019-07-26 | Integrated electromagnetic power-assisted brake and braking method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910684633.1A CN110271525B (en) | 2019-07-26 | 2019-07-26 | Integrated electromagnetic power-assisted brake and braking method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN110271525A CN110271525A (en) | 2019-09-24 |
| CN110271525B true CN110271525B (en) | 2024-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910684633.1A Active CN110271525B (en) | 2019-07-26 | 2019-07-26 | Integrated electromagnetic power-assisted brake and braking method thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61115764A (en) * | 1984-11-10 | 1986-06-03 | Mazda Motor Corp | Electromagnetic servo brake system for automobile |
| CN102923117A (en) * | 2012-11-23 | 2013-02-13 | 武汉理工大学 | Electromagnetic brake power-assisting system of electric automobile |
| CN203958112U (en) * | 2014-06-10 | 2014-11-26 | 重庆示展科技发展中心 | Arm-type autoamtic boosting pedal |
| CN203958111U (en) * | 2014-06-10 | 2014-11-26 | 重庆示展科技发展中心 | Arm-type helping pedal |
| CN203996176U (en) * | 2014-06-10 | 2014-12-10 | 徐刚 | Automatic power booster pedal |
| CN204605541U (en) * | 2015-03-27 | 2015-09-02 | 吉林大学 | There is the electric booster braking system of friction braking and the full decoupled function of regenerative brake |
| CN210502648U (en) * | 2019-07-26 | 2020-05-12 | 国唐汽车有限公司 | Integrated electromagnetic power-assisted brake |
-
2019
- 2019-07-26 CN CN201910684633.1A patent/CN110271525B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61115764A (en) * | 1984-11-10 | 1986-06-03 | Mazda Motor Corp | Electromagnetic servo brake system for automobile |
| CN102923117A (en) * | 2012-11-23 | 2013-02-13 | 武汉理工大学 | Electromagnetic brake power-assisting system of electric automobile |
| CN203958112U (en) * | 2014-06-10 | 2014-11-26 | 重庆示展科技发展中心 | Arm-type autoamtic boosting pedal |
| CN203958111U (en) * | 2014-06-10 | 2014-11-26 | 重庆示展科技发展中心 | Arm-type helping pedal |
| CN203996176U (en) * | 2014-06-10 | 2014-12-10 | 徐刚 | Automatic power booster pedal |
| CN204605541U (en) * | 2015-03-27 | 2015-09-02 | 吉林大学 | There is the electric booster braking system of friction braking and the full decoupled function of regenerative brake |
| CN210502648U (en) * | 2019-07-26 | 2020-05-12 | 国唐汽车有限公司 | Integrated electromagnetic power-assisted brake |
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| CN110271525A (en) | 2019-09-24 |
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