CN114475536A - Pedal man-machine height adjusting device and method suitable for brake-by-wire system - Google Patents
Pedal man-machine height adjusting device and method suitable for brake-by-wire system Download PDFInfo
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- CN114475536A CN114475536A CN202210166984.5A CN202210166984A CN114475536A CN 114475536 A CN114475536 A CN 114475536A CN 202210166984 A CN202210166984 A CN 202210166984A CN 114475536 A CN114475536 A CN 114475536A
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- 239000012530 fluid Substances 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 15
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 2
- 230000036544 posture Effects 0.000 description 7
- 238000013461 design Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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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
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
- B60T7/06—Disposition of pedal
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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
- B60T13/10—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 fluid assistance, drive, or release
- B60T13/12—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 fluid assistance, drive, or release the fluid being liquid
- B60T13/14—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 fluid assistance, drive, or release the fluid being liquid using accumulators or reservoirs fed by pumps
- B60T13/142—Systems with master cylinder
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
Abstract
A man-machine pedal height adjusting device and method applicable to a brake-by-wire system relate to the field of vehicle pedals. The pedal man-machine height adjusting device suitable for the line control brake system comprises a brake master cylinder, a brake pedal, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and a first energy accumulator, wherein a first piston, a second piston and a third piston which are sequentially and elastically connected are arranged in the brake master cylinder to obtain a first cavity, a second cavity and a third cavity in a separated mode, the first cavity and the second cavity are respectively connected with a brake device used for controlling braking of wheels through the first electromagnetic valve and the second electromagnetic valve, and two ends of the third electromagnetic valve are respectively connected with the brake master cylinder and the first energy accumulator. According to the pedal man-machine height adjusting device and method applicable to the brake-by-wire system, the hydraulic structure of the existing brake-by-wire system is adjusted, and the man-machine height of the brake pedal can be set according to the driving posture and habit of a driver on the basis of no obvious cost rise.
Description
Technical Field
The application relates to the field of vehicle pedals, in particular to a pedal man-machine height adjusting device and method suitable for a brake-by-wire system.
Background
In the design and development of the vehicle brake pedal, the fatigue degree of a driver can be effectively reduced through reasonable man-machine arrangement, and the driver can feel good operation. The brake pedal is generally based on a general driver model during design and development, and is reasonably arranged through ergonomic analysis. However, in actual driving, the posture of the driver is often different from the posture of design check, and meanwhile, the operation postures of the driving pedal preferred by different drivers are also different, so that the driver can adjust the height of the brake pedal according to the requirement of the driver, which is an important research and application direction of the vehicle.
At present, the man-machine height of the pedal is generally adjusted by operating a mechanical adjusting device through motor driving or manual force application, but the man-machine height is limited by factors such as mechanical structure complexity, cost and NVH (noise vibration and harshness).
Disclosure of Invention
The application aims to provide a pedal man-machine height adjusting device and method suitable for a brake-by-wire system, which can realize that the man-machine height of a brake pedal can be set according to the driving posture and habit of a driver on the basis of no obvious cost rise, and improve the comfort and the convenience of the operation of the driver.
The embodiment of the application is realized as follows:
the embodiment of the application provides a pedal man-machine height adjusting device suitable for a brake-by-wire system, which comprises the brake-by-wire system used for controlling wheel braking, wherein the brake-by-wire system comprises a brake master cylinder, a brake pedal, a first electromagnetic valve and a second electromagnetic valve, the brake master cylinder is internally provided with a first piston and a second piston in a sliding manner, the brake pedal pushes the first piston to move through an input rod, a first spring is connected between the first piston and the second piston, a closed first cavity is formed by enclosing the first piston, the second piston and the brake master cylinder, a closed second cavity is formed by enclosing the second piston and the brake master cylinder, one ends of the first electromagnetic valve and the second electromagnetic valve are respectively communicated with the first cavity and the second cavity, the other ends of the first electromagnetic valve and the second electromagnetic valve are respectively connected with a braking device used for controlling wheel braking, the pedal man-machine height adjusting device further comprises a third piston, a third electromagnetic valve and a first energy accumulator, the third electromagnetic valve is arranged in the second cavity in a sliding manner, a fourth piston is arranged in a sliding manner, a second spring is connected between the third piston and the second piston, the third piston and the end portion of the brake master cylinder are enclosed to form a closed third cavity, the third cavity is connected with one end of a third electromagnetic valve, the other end of the third electromagnetic valve is connected with one end of a first energy accumulator, and a third spring is connected between the fourth piston and one end of the first energy accumulator.
In some optional embodiments, the piston assembly further comprises a second accumulator, a fifth piston is arranged in the second accumulator in a sliding mode, the first cavity is further communicated with one end of the second accumulator through a fourth control valve, and a fourth spring is connected to one end of the fifth piston and one end of the second accumulator.
In some optional embodiments, the device further comprises a pressure sensor for detecting the pressure in the first cavity.
In some optional embodiments, the fluid storage tank further comprises a fluid storage tank and an electric cylinder, the fluid storage tank is communicated with the first cavity and the second cavity respectively through a pipeline provided with a second check valve and a third check valve, one end of the electric cylinder is communicated with one end, far away from the first cavity, of the fluid storage tank and one end, far away from the first cavity, of the first electromagnetic valve respectively through a pipeline, a fourth check valve is arranged on the pipeline between the electric cylinder and the fluid storage tank, the second check valve and the third check valve respectively control the fluid to flow in one direction to the first cavity and the second cavity, and the fourth check valve controls the fluid to flow in one direction to the electric cylinder.
In some optional embodiments, a fifth electromagnetic valve is arranged on a pipeline between one end of the first electromagnetic valve, which is far away from the first cavity, and the electric cylinder.
In some alternative embodiments, a displacement sensor for detecting the displacement of the brake pedal is connected to the brake pedal.
In some optional embodiments, the liquid storage tank is respectively communicated with the first cavity and the second cavity through pipelines provided with a seventh electromagnetic valve and an eighth electromagnetic valve.
The application also provides a pedal man-machine height adjusting method suitable for the brake-by-wire system, which is carried out by using the pedal man-machine height adjusting device suitable for the brake-by-wire system, and comprises the following steps:
and controlling the first electromagnetic valve and the second electromagnetic valve to be cut off, controlling the third electromagnetic valve to be communicated, treading the brake pedal to the target height, keeping the state of treading the brake pedal, controlling the third electromagnetic valve to be closed, then loosening the brake pedal, controlling the first electromagnetic valve and the second electromagnetic valve to be communicated, and finishing the height adjustment of the pedal.
In some optional embodiments, when the man-machine height of the pedal is adjusted, the brake master cylinder and the liquid storage tank are cut off; after the man-machine height of the pedal is adjusted, the brake master cylinder is communicated with the liquid storage tank.
In some alternative embodiments, after the brake pedal is released and the pressure sensor detects that the brake fluid pressure in the first cavity is zero, the first solenoid valve and the second solenoid valve are controlled to be communicated.
The beneficial effect of this application is: the application provides a pedal man-machine height adjusting device suitable for a brake-by-wire system, which comprises the brake-by-wire system used for controlling wheel braking, wherein the brake-by-wire system comprises a brake master cylinder, a brake pedal, a first electromagnetic valve and a second electromagnetic valve, the brake master cylinder is internally provided with a first piston and a second piston in a sliding manner, the brake pedal pushes the first piston to move through an input rod, a first spring is connected between the first piston and the second piston, a first closed cavity is formed by the first piston, the second piston and the brake master cylinder in a surrounding manner, a second closed cavity is formed by the second piston and the brake master cylinder in a surrounding manner, one end of each of the first electromagnetic valve and the second electromagnetic valve is respectively communicated with the first cavity and the second cavity, the other end of each of the first electromagnetic valve and the second electromagnetic valve is respectively connected with a braking device used for controlling wheel braking, the pedal man-machine height adjusting device further comprises a third piston, a third electromagnetic valve and a first energy accumulator, the third electromagnetic valve are arranged in the second cavity in a sliding manner, a fourth piston is arranged in a sliding manner, a second spring is connected between the third piston and the second piston, the third piston and the end portion of the brake master cylinder are enclosed to form a closed third cavity, the third cavity is connected with one end of a third electromagnetic valve, the other end of the third electromagnetic valve is connected with one end of a first energy accumulator, and a third spring is connected between the fourth piston and one end of the first energy accumulator. The pedal man-machine height adjusting device and method suitable for the brake-by-wire system provided by the application adjust the hydraulic structure of the existing brake-by-wire system, the electromagnetic valve and the energy accumulator used for adjusting the pedal man-machine height are added, the man-machine height of the brake pedal can be set according to the driving posture and habit of a driver on the basis of no obvious cost rise, and the comfort and the convenience of the operation of the driver are improved.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a first use state of a pedal man-machine height adjusting device suitable for a brake-by-wire system according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a second usage state of the pedal human-machine height adjusting device suitable for the brake-by-wire system according to the embodiment of the present application;
fig. 3 is a schematic flowchart of a pedal height adjustment method for a brake-by-wire system according to an embodiment of the present disclosure.
In the figure: 100. a brake master cylinder; 110. a first piston; 120. a second piston; 130. a brake pedal; 140. a first solenoid valve; 150. a second solenoid valve; 160. a first spring; 170. a first cavity; 180. a second cavity; 190. a third piston; 200. a third electromagnetic valve; 210. a first accumulator; 220. a fourth piston; 230. a second spring; 240. a third cavity; 250. a third spring; 260. a second accumulator; 270. a fifth piston; 280. a fourth control valve; 290. a fourth spring; 300. a first check valve; 310. a first pressure sensor; 320. a second pressure sensor; 330. a liquid storage tank; 340. an electric cylinder; 350. a second one-way valve; 360. a third check valve; 370. a fourth check valve; 380. a fifth solenoid valve; 390. a displacement sensor; 400. a sixth electromagnetic valve; 410. a seventh electromagnetic valve; 420. an eighth solenoid valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when in use, and are used only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The features and properties of the pedal height adjustment device and method for a brake-by-wire system according to the present application will be described in further detail with reference to the following embodiments.
As shown in fig. 1 and 2, the present embodiment provides a pedal height adjustment device for a brake-by-wire system, which includes a brake master cylinder 100 having a first piston 110, a second piston 120, and a third piston 190 slidably disposed therein, a brake pedal 130 connected to the first piston 110 via an input rod, a first electromagnetic valve 140, a second electromagnetic valve 150, a third electromagnetic valve 200, and a first accumulator 210 having a fourth piston 220 slidably disposed therein, a first spring 160 connected between the first piston 110 and the second piston 120, a second spring 230 connected between the second piston 120 and the third piston 190, a first cavity 170 enclosed between the first piston 110, the second piston 120, and an inner wall of the brake master cylinder 100, a second cavity 180 enclosed between the second piston 120, the third piston 190, and an inner wall of the brake master cylinder 100, a third cavity 240 enclosed between the third piston 190 and an end of the brake master cylinder 100, one end of the first solenoid valve 140 and one end of the second solenoid valve 150 are respectively communicated with the first cavity 170 and the second cavity 180, the other ends are respectively connected with a braking device for controlling the braking of the wheel, the third cavity 240 is connected with one end of the third solenoid valve 200, the other end of the third solenoid valve 200 is connected with one end of the first accumulator 210, and the fourth piston 220 and one end of the first accumulator 210 are connected with the third spring 250; a displacement sensor 390 for detecting the displacement thereof is connected to the brake pedal 130.
The pedal man-machine height adjusting device suitable for the brake-by-wire system further comprises a second energy accumulator 260 with a fifth piston 270 arranged inside in a sliding mode, the first cavity 170 is further communicated with one end of the second energy accumulator 260 through a fourth control valve 280, one ends of the fifth piston 270 and the second energy accumulator 260 are connected with a fourth spring 290, one end of the second energy accumulator 260, which is connected with the fourth control valve 280, is communicated with the first cavity 170 through a pipeline with a first one-way valve 300, and the first one-way valve 300 is used for controlling fluid to flow to the first cavity 170 in a one-way mode; the first cavity 170 is connected to a first pressure sensor 310 for detecting the internal pressure thereof, and the second solenoid valve 150 is connected to a second pressure sensor 320 for detecting the pressure at an end thereof away from the second cavity 180. The pedal man-machine height adjusting device suitable for the wire-controlled brake system further comprises a liquid storage tank 330 and an electric cylinder 340, wherein the liquid storage tank 330 is respectively communicated with the first cavity 170 and the second cavity 180 through a pipeline provided with a second one-way valve 350 and a third one-way valve 360, the liquid storage tank 330 is respectively communicated with the first cavity 170 and the second cavity 180 through a pipeline provided with a seventh solenoid valve 410 and an eighth solenoid valve 420, one end of the electric cylinder 340 is respectively communicated with the liquid storage tank 330 and one end of the first solenoid valve 140 far away from the first cavity 170 through a pipeline, a fourth one-way valve 370 is arranged on the pipeline between the electric cylinder 340 and the liquid storage tank 330, the second one-way valve 350 and the third one-way valve 360 respectively control fluid to flow in one direction to the first cavity 170 and the second cavity 180, the fourth one-way valve 370 control fluid to flow in one direction to the electric cylinder 340, a fifth solenoid valve 380 is arranged on the pipeline between one end of the first solenoid valve 140 far away from the first cavity 170 and the electric cylinder 340, a sixth solenoid valve 400 is arranged on a pipeline between one end of the second solenoid valve 150 far away from the second cavity 180 and the second pressure sensor 320.
As shown in fig. 3, the present application further provides a pedal man-machine height adjusting method suitable for a brake-by-wire system, which is performed by using the pedal man-machine height adjusting device suitable for a brake-by-wire system, and after the pedal man-machine height adjusting device suitable for a brake-by-wire system is mounted on a vehicle, when the pedal man-machine height needs to be adjusted, the method is performed by the following steps:
s0: after the vehicle is started, a pedal man-machine height adjusting device suitable for the brake-by-wire system is ready;
s1: when the driver needs to adjust the height of the brake pedal 130, the vehicle needs to be controlled to stop, and the pedal man-machine height adjusting device suitable for the brake-by-wire system is only effectively operated in the static state of the vehicle. When the vehicle is stationary and a brake pedal height adjustment request is obtained, the third electromagnetic valve 200 is controlled to be communicated, so that the third cavity 240 of the master cylinder 100 is communicated with the first energy accumulator 210, and the first electromagnetic valve 140, the second electromagnetic valve 150 and the fourth control valve 280 are controlled to be closed, so that the first cavity 170 and the second cavity 180 of the master cylinder 100 are ensured to be sealed, and the first cavity 170 and the second cavity 180 of the master cylinder 100 are disconnected from a brake device for controlling wheel braking;
s2: a driver steps on the brake pedal 130 according to the self-operated posture of the brake pedal 130 and the driving habit requirement to set the man-machine height of the brake pedal 130, when the brake pedal 130 is stepped on, the first piston 110 in the brake master cylinder 100 is pushed to move, so that the first piston 110 pushes the second piston 120 and the third piston 190 through brake fluid to sequentially move along the brake master cylinder 100, the brake fluid in the third cavity 240 of the brake master cylinder 100 is discharged and enters the first energy accumulator 210 through the third electromagnetic valve 200, and the fourth piston 220 in the first energy accumulator 210 is pushed to move and compress the third spring 250;
s3: the driver holds the target position after stepping on the brake pedal 130 to the target position, the driver confirms the height setting of the brake pedal 130, and the process proceeds to S4, otherwise, the process proceeds to S2;
s4: if the pedal stepping stroke exceeds the preset pedal man-machine height range, prompting the driver that the pedal man-machine height range exceeds the range, resetting the pedal man-machine height range, and switching to S3; if the pedal stepping stroke does not exceed the preset pedal man-machine height range, the third electromagnetic valve 200 is controlled to be closed, and the brake fluid pressure in the first accumulator 210 is maintained. The driver releases the brake pedal 130, the first piston 110, the second piston 120 and the third piston 190 in the brake master cylinder 100 keep the current position, the brake pedal 130 keeps the man-machine height position set by the driver, the pedal stroke corresponding to the set man-machine height of the pedal is set to be zero, the pedal stroke is measured by taking the position as a reference position, and the pedal feeling curve is matched.
After the brake pedal 130 is released, the first pressure sensor 310 detects the brake fluid pressure of the first cavity 170 in the master cylinder 100, and when the brake fluid pressure of the first cavity 170 in the master cylinder 100 is reduced to zero, the brake pedal 130 is completely released, so that the man-machine height adjustment of the pedal is completed, and the first electromagnetic valve 140 is controlled to be communicated with the second electromagnetic valve 150; when the pedal man-machine height adjustment is completed, the stroke of the brake pedal 130 is detected by the displacement sensor 390 and the stroke of the position is set to zero.
S5: after the pedal man-machine height adjustment of the brake pedal 130 is completed, the process returns to S1 to wait for the next pedal man-machine height adjustment.
According to the pedal man-machine height adjusting device and method suitable for the brake-by-wire system, the third electromagnetic valve 200 and the first energy accumulator 210 with the fourth piston 220 arranged inside in a sliding mode are additionally arranged on the basis of the existing brake-by-wire system braking device, and the positions of the first piston 110, the second piston 120 and the third piston 190 in the brake master cylinder 100 are controlled and adjusted by controlling and adjusting the volume of brake fluid in the third cavity 240 of the brake master cylinder 100 entering the first energy accumulator 210, so that the man-machine height adjustment of the brake pedal 130 is realized.
In addition, the first cavity 170 and the second cavity 180 of the master cylinder 100 are respectively connected with a liquid storage tank 330 through a pipeline provided with a second check valve 350 and a third check valve 360, when the driver steps on the brake pedal 130 to adjust the height of the brake pedal 130, the third electromagnetic valve 200 is communicated, the first electromagnetic valve 140, the second electromagnetic valve 150 and the fourth control valve 280 are closed, when the height adjustment of the brake pedal 130 is completed and the driver does not step on the brake pedal 130, the third electromagnetic valve 200 is closed, the first electromagnetic valve 140, the second electromagnetic valve 150 and the fourth control valve 280 are communicated, when the pedal 130 is needed to be adjusted to be stepped on by man-machine height, the seventh electromagnetic valve 410 and the eighth electromagnetic valve 420 are controlled to be electrified and closed to be cut off, and the brake fluid of the master cylinder 100 cannot return to the liquid storage tank 330. After the man-machine height of the pedal is adjusted, the seventh electromagnetic valve 410 and the eighth electromagnetic valve 420 are controlled to be in a power-off communication state, the brake master cylinder 100 is communicated with the liquid storage tank 330, brake liquid can return to the liquid storage tank 330, and residual pressure cannot be generated in the system.
The pedal man-machine height adjusting device suitable for the brake-by-wire system provided by the embodiment of the application only adapts and adjusts hardware and realizes man-machine height adjustment of the brake pedal 130 through a control strategy on the basis of the existing integrated brake-by-wire system, and on the basis of no obvious cost rise, the man-machine height of the brake pedal 130 can be set according to the driving posture and habit of a driver, so that the comfort and the convenience of operation of the driver are improved.
The second accumulator 260 in the embodiment of the present application is what is known in the industry as a pedal simulator.
The embodiments described above are some, but not all embodiments of the present application. The detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Claims (10)
1. The pedal man-machine height adjusting device is characterized by further comprising a third piston, a first electromagnetic valve and a second electromagnetic valve which are slidably arranged in the second cavity, wherein the brake pedal, the first electromagnetic valve and the second electromagnetic valve push the first piston to move through an input rod, a first spring is connected between the first piston and the second piston, a closed first cavity is formed by the first piston, the second piston and the brake master cylinder in a surrounding mode, a closed second cavity is formed by the second piston and the brake master cylinder in a surrounding mode, one end of each of the first electromagnetic valve and the second electromagnetic valve is communicated with the first cavity and the second cavity respectively, and the other end of each of the first electromagnetic valve and the second electromagnetic valve is connected with a brake device for controlling wheel braking The brake master cylinder is characterized by comprising a third electromagnetic valve and a first energy accumulator, a fourth piston is arranged in the third electromagnetic valve in a sliding mode, a second spring is connected between the third piston and the second piston, the third piston and the end portion of the brake master cylinder are enclosed to form a closed third cavity, the third cavity is connected with one end of the third electromagnetic valve, the other end of the third electromagnetic valve is connected with one end of the first energy accumulator, and the fourth piston and one end of the first energy accumulator are connected with the third spring.
2. The pedal height adjustment device for a brake-by-wire system according to claim 1, further comprising a second accumulator having a fifth piston slidably disposed therein, wherein the first chamber is further communicated with one end of the second accumulator through a fourth control valve, and a fourth spring is connected between the fifth piston and one end of the second accumulator.
3. The pedal height adjustment mechanism for a brake-by-wire system of claim 1, further comprising a pressure sensor for detecting pressure in the first chamber.
4. The pedal height adjusting device for a linear control brake system according to claim 1, further comprising a fluid reservoir and an electric cylinder, wherein the fluid reservoir is respectively communicated with the first cavity and the second cavity through a pipeline provided with a second check valve and a third check valve, one end of the electric cylinder is respectively communicated with the fluid reservoir and one end of the first electromagnetic valve far away from the first cavity through a pipeline, a fourth check valve is arranged on the pipeline between the electric cylinder and the fluid reservoir, the second check valve and the third check valve respectively control the one-way flow of fluid to the first cavity and the second cavity, and the fourth check valve controls the one-way flow of fluid to the electric cylinder.
5. The pedal height adjusting device for a brake-by-wire system according to claim 4, wherein a fifth solenoid valve is disposed on a pipeline between one end of the first solenoid valve, which is far away from the first cavity, and the electric cylinder.
6. The pedal height adjustment device according to claim 1, wherein a displacement sensor for detecting the displacement of the brake pedal is connected to the brake pedal.
7. The pedal height adjustment device for a brake-by-wire system according to claim 4, wherein the fluid reservoir is in communication with the first chamber and the second chamber through a conduit provided with a seventh solenoid valve and an eighth solenoid valve, respectively.
8. A pedal man-machine height adjusting method for a brake-by-wire system, which is performed using the pedal man-machine height adjusting apparatus for a brake-by-wire system according to claim 1, comprising the steps of:
and controlling the first electromagnetic valve and the second electromagnetic valve to be cut off, controlling the third electromagnetic valve to be communicated, treading the brake pedal to a target height, keeping the state of treading the brake pedal, controlling the third electromagnetic valve to be closed, then loosening the brake pedal, controlling the first electromagnetic valve and the second electromagnetic valve to be communicated, and finishing pedal height adjustment.
9. The pedal man-machine height adjustment method suitable for a brake-by-wire system according to claim 8, wherein the brake master cylinder and the reservoir tank are cut off when the pedal man-machine height is adjusted; after the man-machine height of the pedal is adjusted, the brake master cylinder is communicated with the liquid storage tank.
10. The pedal man-machine height adjustment method suitable for the brake-by-wire system according to claim 8, wherein after the brake pedal is released, the first solenoid valve and the second solenoid valve are controlled to be communicated after a pressure sensor detects that the brake fluid pressure of the first cavity is zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210166984.5A CN114475536B (en) | 2022-02-23 | 2022-02-23 | Pedal man-machine height adjusting device and method suitable for brake-by-wire system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210166984.5A CN114475536B (en) | 2022-02-23 | 2022-02-23 | Pedal man-machine height adjusting device and method suitable for brake-by-wire system |
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| CN114475536A true CN114475536A (en) | 2022-05-13 |
| CN114475536B CN114475536B (en) | 2023-03-14 |
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| DE102016217439A1 (en) * | 2016-09-13 | 2018-03-15 | Audi Ag | Method and device for setting a zero position of a brake pedal |
| US10747257B1 (en) * | 2019-01-14 | 2020-08-18 | Ryan Frazier | Adjustable pedal system |
| CN112918441A (en) * | 2021-03-19 | 2021-06-08 | 江苏理工学院 | Active adjusting type control mechanism for brake feeling and pedal position of electric automobile |
| CN112918442A (en) * | 2021-03-19 | 2021-06-08 | 江苏理工学院 | Pedal mechanism with active adjustment of brake feeling and pedal position of new energy vehicle |
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2022
- 2022-02-23 CN CN202210166984.5A patent/CN114475536B/en active Active
Patent Citations (5)
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|---|---|---|---|---|
| DE102016217439A1 (en) * | 2016-09-13 | 2018-03-15 | Audi Ag | Method and device for setting a zero position of a brake pedal |
| CN107685630A (en) * | 2017-08-29 | 2018-02-13 | 辽宁工程技术大学 | A kind of adjustable Labor-saving kart pedal gear in position |
| US10747257B1 (en) * | 2019-01-14 | 2020-08-18 | Ryan Frazier | Adjustable pedal system |
| CN112918441A (en) * | 2021-03-19 | 2021-06-08 | 江苏理工学院 | Active adjusting type control mechanism for brake feeling and pedal position of electric automobile |
| CN112918442A (en) * | 2021-03-19 | 2021-06-08 | 江苏理工学院 | Pedal mechanism with active adjustment of brake feeling and pedal position of new energy vehicle |
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