CN115257663B - Parking braking method and system and vehicle - Google Patents
Parking braking method and system and vehicle Download PDFInfo
- Publication number
- CN115257663B CN115257663B CN202110475387.6A CN202110475387A CN115257663B CN 115257663 B CN115257663 B CN 115257663B CN 202110475387 A CN202110475387 A CN 202110475387A CN 115257663 B CN115257663 B CN 115257663B
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- parking brake
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 230000002860 competitive effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 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
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/08—Brake-action initiating means for personal initiation hand actuated
- B60T7/085—Brake-action initiating means for personal initiation hand actuated by electrical means, e.g. travel, force sensors
-
- 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
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
Abstract
The invention discloses a parking braking method, a parking braking system and a vehicle, comprising the following steps: when any one of A to G is met, the EPB caliper mechanism clamps the wheel and performs P-gear locking; when H is met, the EPB caliper mechanism clamps the wheel in a step mode; when I or J is met, the EPB caliper mechanism clamps the wheel; a, switching the whole vehicle from power-on to power-off; B. pressing a P-gear key; the EPB virtual switch sends out a clamping signal; D. charging/discharging gun access; E. opening the door under the non-P gear; F. requesting parking braking after intelligent driving is finished; after the ESP pressure maintaining exceeds the maximum time limit, requesting parking braking; H. the P gear key is pressed down, and the speed of the vehicle is larger than a second preset speed threshold; I. pressing a brake pedal and sending a clamping signal by the EPB virtual switch; J. requesting a parking brake when intelligent driving is suspended or temporarily stopped; the conditions A to E and I need to meet that the vehicle speed is smaller than a first preset vehicle speed threshold. The invention reduces the cost and realizes the redundant control of the parking brake.
Description
Technical Field
The invention belongs to the technical field of parking braking of electric automobiles, and particularly relates to a parking braking method and system and a vehicle.
Background
Under the background that the safety requirements of users on the whole vehicle are stricter, a plurality of vehicle enterprises are equipped with a P (i.e. a parking gear) gear locking mechanism and an EPB (i.e. an electronic parking brake system) parking mechanism, so that double redundancy braking is realized, and the whole vehicle can still realize parking braking under the condition that one set of parking mechanism fails, thereby meeting the requirements of regulations. In the current competitive market situation, many vehicle enterprises face the two-choice decision of reducing cost and improving configuration.
Therefore, there is a need to develop a new parking brake method, system and vehicle.
Disclosure of Invention
The invention aims to provide a parking braking method, a parking braking system and a vehicle, which can realize the linkage control of a P gear and an EPB caliper mechanism and the independent control of the EPB on the premise of reducing the cost.
The invention relates to a parking braking method, which comprises the following steps:
when any one of the conditions A to G is met, parking braking of linkage control of the P-gear locking mechanism and the EPB caliper mechanism is carried out, specifically: the EPB caliper mechanism is controlled to clamp the wheels, and the P-gear locking mechanism is controlled to lock the P-gear;
when the condition H is met, the parking brake which is independently controlled by the EPB caliper mechanism is carried out, specifically: the EPB caliper mechanism is controlled to clamp the wheels in a stepped manner, so that the dynamic speed reduction of the whole vehicle is realized;
when the condition I or the condition J is met, the parking brake independently controlled by the EPB caliper mechanism is carried out, specifically: controlling the EPB caliper mechanism to clamp the wheels;
the method comprises the steps of A, detecting that the whole vehicle is switched from a power-on state to a power-off state and the vehicle speed is smaller than a first preset vehicle speed threshold value;
detecting that a P gear key is pressed and the vehicle speed is smaller than a first preset vehicle speed threshold value;
detecting a clamping signal sent by the EPB virtual switch, wherein the speed of the clamping signal is smaller than a first preset speed threshold;
detecting that the charging/discharging gun is connected and the vehicle speed is smaller than a first preset vehicle speed threshold value;
detecting that the vehicle door is opened under the condition of non-P gear and the vehicle speed is smaller than a first preset vehicle speed threshold value;
the intelligent driving is finished, and then the whole vehicle is requested to carry out parking braking;
after the condition G.ESP pressure maintaining exceeds the maximum time limit, requesting the whole vehicle to carry out parking braking
The condition H.P is that the gear button is pressed and the vehicle speed is greater than a second preset vehicle speed threshold;
detecting a clamping signal sent by an EPB virtual switch when a brake pedal is stepped down, wherein the speed of the vehicle is smaller than a first preset speed threshold;
and (J) requesting the whole vehicle to carry out parking braking when intelligent driving is suspended or temporary parking is carried out.
Optionally, the P-gear key is a self-resetting switch key, and has two operation modes of short press and long press;
in the condition B, the P-gear key is pressed down for a short time;
in the condition H, the P-gear key is pressed for a long time.
Optionally, in the parking brake controlled by the P-gear locking mechanism and the EPB caliper mechanism in a linkage manner, the P-gear locking mechanism performs the parking brake control after the EPB feeds back the clamped state or performs timeout.
Optionally, after parking braking controlled by the P-gear locking mechanism and the EPB caliper mechanism in a linkage manner, after detecting a release state fed back by the P-gear locking mechanism or overtime of EPB execution, the EPB caliper mechanism is controlled to release wheels.
Alternatively, after the parking brake independently controlled by the EPB caliper mechanism, the EPB caliper mechanism is controlled to release the wheels after detecting a release signal sent by the EPB virtual switch.
Optionally, the EPB virtual switch is disposed in the vehicle screen, and the EPB virtual switch includes an EPB clamping button and/or an EPB release button, and when the EPB clamping button is clicked, the EPB virtual switch sends out a clamping signal, and when the EPB release button is clicked, the EPB virtual switch sends out a release signal; and when the EPB is in a down-line detection parking force and the whole vehicle is in a static state, the EPB virtual switch can be set to be in an operable state, and other scenes can not be operated.
In a second aspect, the invention provides a parking brake system, which comprises an EPB switch, a P gear button, an EPB caliper mechanism, a P gear locking mechanism, a first controller, a second controller and a third controller; the first controller is respectively connected with the P-gear key and the P-gear locking mechanism; the second controller is respectively connected with the EPB switch and the EPB caliper mechanism; the first controller is connected with the second controller, and the third controller is connected with the second controller;
the EPB switch is an EPB virtual switch and is arranged on a vehicle screen;
the first controller, the second controller and the third controller are configured to perform the steps of the parking brake method according to the present invention.
Optionally, the second controller and the third controller are independent controllers or integrated controllers respectively.
Optionally, the first controller is a vehicle controller; the second controller is an EPB controller; the third controller is an ESP controller.
In a third aspect, the invention provides a vehicle employing a park brake system according to the invention.
In a fourth aspect, the present invention provides a storage medium having a computer readable program stored therein, the computer readable program when invoked being capable of performing the steps of the parking brake method according to the present invention.
The invention has the following advantages: the invention can realize the working conditions of the linkage of the P-gear locking mechanism and the EPB caliper mechanism in the scenes of the whole vehicle power-down, charging, the non-P-gear driver opening the vehicle door to leave the vehicle and the like, and can also meet the working conditions of the independent clamping of the EPB caliper in the scenes of the whole vehicle high-speed emergency parking scene, temporary parking and the like. Under the normal use condition of the whole vehicle, a driver only operates the P gear button to realize all parking brakes; when the EPB is used for detecting the parking force or the P-gear key fails, a driver can meet the requirements of safe parking under the conditions of parking force test and failure of the P-gear key by operating the EPB virtual switch.
Drawings
FIG. 1 is a system block diagram of the present embodiment;
FIG. 2 is a flow chart of the parking brake for P-gear and EPB coordinated control in the present embodiment;
FIG. 3 is a flow chart of the EPB individually controlled parking brake in the present embodiment;
in the figure: 1. the device comprises a P-gear key, 2, an EPB virtual switch, 3, a whole vehicle controller, 4, an EPB controller, 5, a P-gear locking mechanism, 6, an EPB caliper mechanism, 7 and a vehicle screen; an esp controller.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, a parking brake system includes an EPB switch, a P-gear button 1, an EPB caliper mechanism 6, a P-gear locking mechanism 5, a first controller, a second controller, and a third controller. The first controller is respectively connected with the P-gear key 1 and the P-gear locking mechanism 5. The second controller is connected to the EPB switch and EPB caliper mechanism 6, respectively. The first controller is connected with the second controller, and the second controller is connected with the third controller.
In this embodiment, the second controller and the third controller are independent controllers respectively, or may be integrated controllers.
In this embodiment, the first controller is the whole vehicle controller 3; the second controller is an EPB controller 4; the third controller is an ESP controller 8.
In this embodiment, the EPB switch is an EPB virtual switch 2, which is disposed in the vehicle screen 7, where the EPB virtual switch 2 includes an EPB clamping button and/or an EPB release button, and when the EPB clamping button is clicked, the EPB virtual switch 2 sends out a clamping signal, and when the EPB release button is clicked, the EPB virtual switch sends out a release signal; and when the EPB is in a down-line detection parking force and the whole vehicle is in a static state, the EPB virtual switch can be set to be in an operable state, and other scenes can not be operated.
After the driver operates the P-gear button 1, the whole vehicle controller 3 collects the state of the P-gear button 1, executes parking braking or emergency braking according to the vehicle speed judgment, sends an electronic hand brake request or the state of the P-gear button 1 to the EPB controller 4, and the EPB controller 4 controls the EPB caliper mechanism 6 to execute parking braking or emergency braking according to the electronic hand brake request or the state of the P-gear button 1, and after the EPB caliper mechanism 6 is clamped and the clamping state is fed back, the P-gear locking mechanism 5 locks wheels.
After the driver operates the EPB virtual switch 2 on the car screen 7 in the operable state, the car screen 7 transmits the state of the EPB virtual switch 2 to the EPB controller 4, and the EPB controller 4 controls the EPB caliper to execute the parking brake according to the state of the EPB virtual switch 2.
In this embodiment, a parking brake method includes the following steps:
when any one of the conditions a to G is satisfied, the parking brake for the P-stage lock mechanism 5 and EPB caliper mechanism 6 to be controlled in linkage is specifically: the EPB caliper mechanism 6 is controlled to clamp the wheels, and the P-gear locking mechanism 5 is controlled to lock the P gear, so that redundant parking braking is realized.
When the condition H is satisfied, the EPB caliper mechanism 6 alone controls the parking brake, specifically: the EPB caliper mechanism 6 is controlled to clamp the wheels in a stepped mode, and the whole vehicle is dynamically decelerated, so that emergency braking is achieved.
When the condition I or the condition J is satisfied, the parking brake individually controlled by the EPB caliper mechanism 6 is performed, specifically: the EPB caliper mechanism 6 is controlled to clamp the wheels, thereby realizing the parking brake.
Wherein:
the method comprises the steps of A, detecting that the whole vehicle is switched from a power-on state to a power-off state and the vehicle speed is smaller than a first preset vehicle speed threshold value;
detecting that the P gear key 1 is pressed and the vehicle speed is smaller than a first preset vehicle speed threshold value;
detecting a clamping signal sent by the EPB virtual switch 2, wherein the speed of the vehicle is smaller than a first preset speed threshold;
detecting that the charging/discharging gun is connected and the vehicle speed is smaller than a first preset vehicle speed threshold value;
detecting that the vehicle door is opened under the condition of non-P gear and the vehicle speed is smaller than a first preset vehicle speed threshold value;
the intelligent driving is finished, and then the whole vehicle is requested to enter the parking brake;
requesting the whole vehicle to carry out parking braking after the ESP pressure maintaining exceeds the maximum time limit;
the condition H.P is that the gear button 1 is pressed and the vehicle speed is greater than a second preset vehicle speed threshold;
detecting that a brake pedal is depressed, and the speed of the vehicle is smaller than a first preset speed threshold value, wherein the clamping signal is sent by the EPB virtual switch 2;
and (J) requesting the whole vehicle to carry out parking braking when intelligent driving is suspended or temporary parking is carried out.
As shown in fig. 2, in this embodiment, the specific method of parking brake controlled by the P-gear locking mechanism 5 and EPB caliper mechanism 6 in linkage is as follows:
when any one of the conditions a to F is satisfied, the following description will be given by taking the driver's insertion of the charge/discharge gun as an example:
when a driver inserts a charging gun/discharging gun, the whole vehicle controller 3 detects that the charging gun/discharging gun is connected, and judges that the vehicle speed is smaller than a first preset vehicle speed threshold (for example, 3 km/h), an electronic hand brake request is sent to be clamped, the EPB controller 4 receives the clamping request and then controls the EPB caliper mechanism 6 to clamp wheels for parking, after the EPB caliper mechanism 6 clamps, the EPB controller 4 feeds back the EPB state to be clamped, and after the whole vehicle controller 3 receives the EPB clamping state, the P-gear locking mechanism 5 is controlled to lock the wheels, so that redundant parking braking is realized.
In the present embodiment, in the parking brake controlled by the P-stage lock mechanism 5 and the EPB caliper mechanism 6 in conjunction, the P-stage lock mechanism 5 executes the parking brake control after the EPB feedback clamping state or execution time-out.
In this embodiment, after the redundant parking brake, when the release state fed back by the P-gear locking mechanism 5 is detected, that is, when the driver switches from "P" to "non-P" in power-on gear shift, the P-gear locking mechanism 5 should be controlled to release the lock, and after confirming that the P-gear locking mechanism 5 releases the lock, the whole vehicle controller 3 sends a request for releasing the electronic hand brake, and after receiving the request for releasing the electronic hand brake, the EPB controller 4 controls the EPB caliper mechanism 6 to release the wheels.
In this embodiment, after the redundant parking brake, the EPB caliper mechanism 6 is controlled to release after detecting that the EPB execution times out.
As shown in fig. 3, in the present embodiment, when the condition H is satisfied, the parking brake individually controlled by the EPB caliper mechanism 6 is performed, specifically:
in the driving process, if an emergency situation occurs, after the driver presses the P-gear button 1, the whole vehicle controller 3 detects that the P-gear button 1 is pressed and judges that the vehicle speed is greater than a second preset vehicle speed threshold (for example, 10 km/h), the state of the P-gear button 1 is pressed, and after the EPB controller 4 receives that the state of the P-gear button 1 is pressed, the EPB controller controls the EPB stepped clamping wheels to force the vehicle to decelerate and realize emergency braking.
When the condition I or the condition J is satisfied, the parking brake individually controlled by the EPB caliper mechanism 6 is performed, specifically:
when the driver depresses the brake pedal and the vehicle speed is less than 3km/h, the vehicle machine sets the EPB virtual switch 2 to an operable state. In an operable state, after detecting that the driver operates the EPB virtual switch 2 to clamp, sending that the state of the EPB virtual switch 2 is clamped, and after receiving a clamping request, the EPB controller 4 controls the EPB caliper mechanism 6 to clamp wheels for parking, so that parking braking is realized.
In this embodiment, after the parking brake independently controlled by the EPB caliper mechanism 6, after detecting that the driver operates the EPB virtual switch 2 to release, the EPB virtual switch 2 is sent to release, and after receiving the release request, the EPB controller 4 controls the EPB caliper mechanism 6 to release the wheels.
In this embodiment, a vehicle employs the parking brake system as described in this embodiment.
Claims (8)
1. A method of parking brake comprising the steps of:
when any one of the conditions A to G is satisfied, the parking brake for the linkage control of the P-gear locking mechanism (5) and the EPB caliper mechanism (6) is performed, specifically: the EPB caliper mechanism (6) is controlled to clamp the wheels, and the P-gear locking mechanism (5) is controlled to perform P-gear locking;
when the condition H is satisfied, the parking brake independently controlled by the EPB caliper mechanism (6) is performed, specifically: the EPB caliper mechanism (6) is controlled to clamp the wheels in a stepped mode, and dynamic speed reduction of the whole vehicle is achieved;
when the condition I or the condition J is met, the parking brake independently controlled by the EPB caliper mechanism (6) is carried out, specifically: controlling the EPB caliper mechanism (6) to clamp the wheels;
the method comprises the steps of A, detecting that the whole vehicle is switched from a power-on state to a power-off state and the vehicle speed is smaller than a first preset vehicle speed threshold value;
detecting that the P gear key (1) is pressed and the vehicle speed is smaller than a first preset vehicle speed threshold value;
detecting a clamping signal sent by the EPB virtual switch, wherein the speed of the clamping signal is smaller than a first preset speed threshold;
detecting that the charging/discharging gun is connected and the vehicle speed is smaller than a first preset vehicle speed threshold value;
detecting that the vehicle door is opened under the condition of non-P gear and the vehicle speed is smaller than a first preset vehicle speed threshold value;
the intelligent driving is finished, and then the whole vehicle is requested to carry out parking braking;
requesting the whole vehicle to carry out parking braking after the ESP pressure maintaining exceeds the maximum time limit;
the condition H.P is that the gear button (1) is pressed and the vehicle speed is greater than a second preset vehicle speed threshold;
detecting a clamping signal sent by an EPB virtual switch when a brake pedal is stepped down, wherein the speed of the vehicle is smaller than a first preset speed threshold;
the condition J is that the intelligent driving is stopped or the vehicle is temporarily stopped, and the vehicle is requested to carry out parking braking;
the P-gear key (1) is a self-resetting switch key and has two operation modes of short press and long press;
in the condition B, the P-gear key (1) is pressed down for a short time;
in the condition H, the P-gear key (1) is pressed down for a long time;
in the parking brake controlled by the P-gear locking mechanism (5) and the EPB caliper mechanism (6), the P-gear locking mechanism (5) executes the parking brake control after the EPB feeds back the clamping state or the execution time-out.
2. A parking brake method as defined in claim 1, wherein: after parking braking controlled by the P-gear locking mechanism (5) and the EPB caliper mechanism (6) in a linkage mode, the EPB caliper mechanism (6) is controlled to release wheels after detecting the release state fed back by the P-gear locking mechanism (5) or the EPB execution overtime.
3. A parking brake method as defined in claim 2, wherein: after the parking brake independently controlled by the EPB caliper mechanism (6), the EPB caliper mechanism (6) is controlled to release the wheels after the release signal sent by the EPB virtual switch is detected.
4. A method of parking brake according to any one of claims 1 to 3, wherein: the EPB virtual switch (2) is arranged in the vehicle screen (7), the EPB virtual switch (2) comprises an EPB clamping button and/or an EPB release button, when the EPB clamping button is clicked, the EPB virtual switch (2) sends out a clamping signal, and when the EPB release button is clicked, the EPB virtual switch sends out a release signal; and when the EPB is in a down-line detection parking force and the whole vehicle is in a static state, the EPB virtual switch (2) can be set to be in an operable state, and other scenes can not be operated.
5. A parking brake system comprises an EPB switch, a P gear button (1), an EPB caliper mechanism (6), a P gear locking mechanism (5), a first controller, a second controller and a third controller; the first controller is respectively connected with the P-gear key (1) and the P-gear locking mechanism (5); the second controller is respectively connected with the EPB switch and the EPB caliper mechanism (6); the first controller is connected with the second controller; the third controller is connected with the second controller, and is characterized in that:
the EPB switch is an EPB virtual switch (2) and is arranged on a vehicle screen (7);
the first, second and third controllers are configured to be able to perform the steps of the parking brake method as claimed in any one of claims 1 to 4.
6. The parking brake system as set forth in claim 5, wherein: the second controller and the third controller are respectively independent controllers or integrated controllers.
7. The parking brake system as set forth in claim 5, wherein: the first controller is a whole vehicle controller (3); the second controller is an EPB controller (4); the third controller is an ESP controller.
8. A vehicle, characterized in that: use of a parking brake system according to claim 6 or 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110475387.6A CN115257663B (en) | 2021-04-29 | 2021-04-29 | Parking braking method and system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110475387.6A CN115257663B (en) | 2021-04-29 | 2021-04-29 | Parking braking method and system and vehicle |
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| Publication Number | Publication Date |
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| CN115257663A CN115257663A (en) | 2022-11-01 |
| CN115257663B true CN115257663B (en) | 2024-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110475387.6A Active CN115257663B (en) | 2021-04-29 | 2021-04-29 | Parking braking method and system and vehicle |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116394908B (en) * | 2023-06-06 | 2023-09-15 | 北京易控智驾科技有限公司 | Unmanned vehicle control method, system, electronic device and storage medium |
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| CN115257663A (en) | 2022-11-01 |
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