WO2022205133A1 - 液压制动装置及车辆 - Google Patents

液压制动装置及车辆 Download PDF

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Publication number
WO2022205133A1
WO2022205133A1 PCT/CN2021/084573 CN2021084573W WO2022205133A1 WO 2022205133 A1 WO2022205133 A1 WO 2022205133A1 CN 2021084573 W CN2021084573 W CN 2021084573W WO 2022205133 A1 WO2022205133 A1 WO 2022205133A1
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WO
WIPO (PCT)
Prior art keywords
piston
braking device
hydraulic
permanent magnet
stroke sensor
Prior art date
Application number
PCT/CN2021/084573
Other languages
English (en)
French (fr)
Inventor
贾光欣
卢宇灏
张永生
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP21933801.9A priority Critical patent/EP4292892A4/en
Priority to PCT/CN2021/084573 priority patent/WO2022205133A1/zh
Priority to CN202180000670.1A priority patent/CN113226876B/zh
Publication of WO2022205133A1 publication Critical patent/WO2022205133A1/zh
Priority to US18/474,745 priority patent/US20240017708A1/en

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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
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/16—Master control, e.g. master cylinders
    • B60T11/165—Single master cylinders for pressurised systems
    • 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
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/662—Electrical control in fluid-pressure brake systems characterised by specified functions of the control system components
    • 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
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/16—Master control, e.g. master cylinders
    • 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
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
    • B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
    • 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
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • 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
    • B60T7/042—Brake-action initiating means for personal initiation foot actuated by electrical means, e.g. using travel or 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
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/321—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration deceleration
    • B60T8/3255—Systems in which the braking action is dependent on brake pedal data
    • B60T8/326—Hydraulic systems
    • 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
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/321—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration deceleration
    • B60T8/3255—Systems in which the braking action is dependent on brake pedal data
    • B60T8/3275—Systems with a braking assistant function, i.e. automatic full braking initiation in dependence of brake pedal velocity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1457—Piston rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
    • F15B7/06—Details
    • F15B7/08—Input units; Master units
    • 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
    • B60T2220/00—Monitoring, detecting driver behaviour; Signalling thereof; Counteracting thereof
    • B60T2220/04—Pedal travel sensor, stroke sensor; Sensing brake request
    • 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
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/40—Failsafe aspects of brake control systems
    • B60T2270/402—Back-up
    • 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
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/40—Failsafe aspects of brake control systems
    • B60T2270/404—Brake-by-wire or X-by-wire failsafe
    • 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
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/82—Brake-by-Wire, EHB
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2861—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using magnetic means

Definitions

  • the present application relates to the field of vehicles, and more particularly, to a hydraulic braking device and a vehicle.
  • the braking system of a vehicle is a system that applies a certain braking force to the wheels of the vehicle, thereby performing a certain degree of forced braking.
  • the function of the braking system is to force the moving vehicle to decelerate or even stop according to the requirements of the driver or the controller, or to stabilize the parked vehicle under various road conditions (for example, on a slope), or to make the vehicle stop.
  • the speed of the vehicle traveling downhill remains stable.
  • Electro-hydraulic brake as a popular brake system, usually includes a hydraulic brake device.
  • the hydraulic braking device usually includes a master cylinder, a stroke sensor and a permanent magnet.
  • the master cylinder is used to convert the input force of the push rod into hydraulic pressure, and the permanent magnet and the push rod follow, so that the magnetic field at the stroke sensor changes, and the stroke sensor senses this change and outputs an electrical signal.
  • the distance (air gap) between the permanent magnet and the travel sensor has a greater impact on the magnetic field strength at the travel sensor. The larger the air gap, the less conducive to ensuring the accuracy of the sensor signal.
  • the present application provides a hydraulic braking device and a vehicle, which can ensure the signal accuracy of the stroke sensor.
  • a hydraulic braking device in a first aspect, includes: a first hydraulic block 10 ; a master cylinder part 110 , which is arranged on the first hydraulic block 10 , and the master cylinder part 110 includes a push rod 111 and a piston 112 , the main cup 113 of the piston 112 and the sub cup 114 of the piston 112, the piston 112 is connected with the push rod 111; the permanent magnet 120 is arranged inside the piston 112; the stroke sensor 130 is arranged in the main cup 113 and the sub cup 114 In between, the movement of the permanent magnet 120 is detected to determine the movement amount of the piston 112 .
  • the permanent magnet is disposed inside the piston 112, and the stroke sensor is disposed between the main cup and the sub cup of the piston.
  • the distance (air gap) between the stroke sensor and the permanent magnet is small, so that the accuracy of the sensor signal can be guaranteed.
  • the first hydraulic block 10 is provided with a blind hole 11 between the main cup 113 and the sub cup 114 , and the stroke sensor 130 is provided in the blind hole 11 .
  • the braking device further includes: a sheath 160 disposed outside the piston 112 and fixed to the first hydraulic block 10 for limiting the piston 112 .
  • a sheath may also be provided on the outer side of the piston to limit the position of the piston.
  • the permanent magnet 130 is fixed in the piston 112; the braking device further includes: an anti-rotation mechanism 170 for fixing the piston 112 to the sheath 160 to prevent the piston Rotation of 112 about its own axis results in a change in the magnetic field caused by rotation of permanent magnet 120 about its own axis.
  • the piston may be provided with an anti-rotation mechanism, and the anti-rotation mechanism is used to fix the piston to the sheath. Since the sheath is fixed on the first hydraulic block, the permanent magnet is fixed in the piston. Therefore, the change of the magnetic field caused by the rotation of the permanent magnet along its own axis can be prevented, and the signal accuracy can be ensured.
  • the anti-rotation mechanism 170 includes: an anti-rotation member 171 fixed to the end of the piston 112 on the side close to the push rod 111; On the rotating member 171 ; the anti-rotation ribs 173 are arranged on the sheath 160 , and the anti-rotation ribs 173 are protrusions on the sheath 160 ; wherein, the anti-rotation grooves 172 match with the anti-rotation ribs 173 .
  • the braking device further includes: a solenoid valve 140, and the distance between the solenoid valve 140 and the stroke sensor 130 is greater than or equal to a target threshold.
  • the target threshold is such that the magnetic flux leaking from the solenoid valve 140 does not have an effect on the magnetic field at the stroke sensor.
  • the distance between the solenoid valve and the stroke sensor is greater than or equal to the target threshold, so that the magnetic flux leaked by the solenoid valve does not affect the magnetic field at the stroke sensor, thereby ensuring the signal stability of the sensor.
  • the braking device further includes: a second hydraulic block 20 , and the solenoid valve 140 is disposed on the second hydraulic block 20 .
  • the solenoid valve is disposed on the second hydraulic block to be away from the stroke sensor.
  • the magnetic flux leaked by the solenoid valve will not affect the magnetic field at the stroke sensor, thereby ensuring the signal stability of the sensor.
  • the stroke sensor 130 includes a sensor chip 131 and a sensor substrate 132; the braking device further includes: a control substrate 150, the control substrate 150 is respectively connected to the solenoid valve 140 and the sensor substrate 132 is electrically connected.
  • a wire-controlled electronic hydraulic system including the hydraulic braking device in the first aspect or any possible implementation manner of the first aspect.
  • a vehicle including the hydraulic braking device in the first aspect or any possible implementation manner of the first aspect.
  • FIG. 1 is an example partial cross-sectional view of a hydraulic braking device provided in an embodiment of the present application
  • FIG. 2 is an example diagram of a three-dimensional structure of a hydraulic braking device provided by an embodiment of the present application
  • FIG. 3 is an exemplary diagram of a sheath position structure provided by an embodiment of the present application.
  • FIG. 4 is an example diagram of a three-dimensional structure of an anti-rotation mechanism provided by an embodiment of the present application.
  • the permanent magnet is arranged inside the piston (that is, the piston connected with the push rod), and the stroke sensor is arranged inside the control unit housing of the hydraulic brake device.
  • the distance between the permanent magnet and the stroke sensor is the thickness of the piston wall, the height of the leather cup, the wall thickness of the master cylinder shell, the structural parts of the sensor itself, etc., so that the distance (air gap) between the permanent magnet and the stroke sensor is large, so that the The sensor signal accuracy has an impact.
  • the present application provides a hydraulic braking device, in which a permanent magnet is arranged inside a piston connected to a push rod, and a stroke sensor is arranged between the main cup and the auxiliary cup of the piston , so that the distance between the permanent magnet and the stroke sensor can be reduced, and the signal accuracy of the stroke sensor can be further ensured.
  • FIG. 1 is an exemplary partial cross-sectional view of a hydraulic braking device provided in an embodiment of the present application. It should be understood that FIG. 1 may be a partial cross-sectional view of FIG. 2 .
  • the hydraulic brake device 100 includes a first hydraulic block 10 , a master cylinder portion 110 , a permanent magnet 120 , and a stroke sensor 130 .
  • the master cylinder part 110 is arranged on the first hydraulic block 10, and the master cylinder part 110 includes a push rod 111 (not shown in FIG. 1, see FIG. 2), a piston 112, a main cup 113 of the piston 112 and a pair of pistons Leather bowl 114.
  • the piston 112 is connected with the push rod 111, therefore, the piston 112 may also be called a main piston or a push rod piston. It should also be understood that the pistons described below are all pistons 112 .
  • the permanent magnet 120 is disposed inside the piston 112 .
  • the stroke sensor 130 is disposed between the main cup 113 and the sub cup 114 for detecting the movement of the permanent magnet 120 to determine the movement amount of the piston 112 .
  • the first hydraulic block 10 is provided with a blind hole 11 between the main cup 113 and the auxiliary cup 114 , and the stroke sensor 130 is provided in the blind hole 11 , as shown in FIG. 1 . That is, the stroke sensor 130 can be enclosed in the first hydraulic block 10 . At the same time, since the stroke sensor 130 in the present application is located in the blind hole on the first hydraulic block 10 alone. Therefore, in actual operation, the travel sensor 130 also needs to be protected.
  • the travel sensor 130 may be a Hall sensor, or may be other sensors, which are not limited in this application.
  • the permanent magnet 120 will follow the push rod 111, so that the magnetic field at the stroke sensor 130 changes, and the stroke sensor 130 senses the change and outputs an electrical signal.
  • the permanent magnet is arranged inside the piston (the piston is the piston 112 ), and the stroke sensor is arranged between the main cup and the auxiliary cup of the piston.
  • the distance (air gap) between the stroke sensor and the permanent magnet is small, so that the accuracy of the sensor signal can be guaranteed.
  • the hydraulic braking device usually needs to integrate a solenoid valve and other devices that will generate large magnetic flux leakage, but when the solenoid valve is close to the stroke sensor, the magnetic flux leaked by the solenoid valve will have an impact on the magnetic field at the stroke sensor. This in turn affects the signal stability of the travel sensor.
  • the braking device 100 may further include: a solenoid valve 140 (see FIG. 2 ), and the distance between the solenoid valve 140 and the stroke sensor 130 is greater than or equal to a target threshold.
  • the target threshold is such that the magnetic flux leaking from the solenoid valve 140 does not have an effect on the magnetic field at the stroke sensor.
  • the solenoid valve 140 can be arranged on the first hydraulic block 10 or other hydraulic blocks, as long as the distance between the solenoid valve 140 and the stroke sensor 130 can be ensured to be greater than or equal to the target threshold, so that the magnetic flux leaked by the solenoid valve can be ensured. It is sufficient that the magnetic field at the stroke sensor is not affected.
  • the solenoid valve 140 is provided on other hydraulic blocks, for example, the second hydraulic block 20 (see FIG. 2 ) as an example for description.
  • the stroke sensor 130 includes a sensor chip 131 and a sensor substrate 132 .
  • the braking device 100 may further include: a control substrate 150 (see FIG. 2 ), and the control substrate 150 is electrically connected to the solenoid valve 140 and the sensor substrate 132 respectively.
  • FIG. 2 is only used as an example, and does not constitute a limitation to the present application.
  • FIG. 2 is an example diagram of a three-dimensional structure of a hydraulic braking device provided by an embodiment of the present application.
  • the hydraulic braking device 200 includes: a first hydraulic block 10 , a second hydraulic block 20 , a master cylinder 110 , a permanent magnet 120 , a stroke sensor 130 , a solenoid valve 140 , and a control substrate 150 .
  • the master cylinder part 110 is disposed on the first hydraulic block 10 , and the master cylinder part 110 includes a push rod 111 , a piston 112 , a main cup 113 of the piston 112 and a sub cup 114 of the piston 112 , and the piston 112 is connected to the push rod 111 .
  • the permanent magnet 120 is disposed inside the piston 112 .
  • the stroke sensor 130 is disposed between the main cup 113 and the sub cup 114 for detecting the movement of the permanent magnet 120 to determine the movement amount of the piston 112 .
  • the solenoid valve 140 is disposed on the second hydraulic block 20 to be away from the stroke sensor 130 .
  • the control substrate 150 is electrically connected to the solenoid valve 140 and the stroke sensor 130 respectively.
  • control substrate 150 and the stroke sensor 130 are electrically connected actually means that the control substrate 150 is electrically connected to the sensor substrate 132 of the stroke sensor 130 .
  • the permanent magnet is arranged inside the piston
  • the stroke sensor is arranged between the main cup and the auxiliary cup of the piston
  • the solenoid valve is arranged on the second hydraulic block and away from the stroke sensor.
  • the distance (air gap) between the stroke sensor and the permanent magnet is reduced, so that the signal accuracy of the sensor can be ensured; Ensure the signal stability of the sensor.
  • the outer side of the piston 112 in the hydraulic braking devices 100 and 200 provided by the present application may also be provided with a sheath 160 , as shown in FIG. 3 .
  • the sheath 160 is used to limit the piston 112 .
  • the sheath 160 is fixed on the first hydraulic block 10 .
  • the permanent magnets 120 in the hydraulic braking devices 100 and 200 provided by the present application need to be fixed in the piston 112 to prevent relative movement between the permanent magnets 120 and the piston 112 . It should be understood that the present application does not limit the fixing manner in which the permanent magnet 120 is fixed in the piston 112 .
  • the piston 112 in the hydraulic brake devices 100 and 200 provided by the present application may also be provided with an anti-rotation mechanism 170 (see FIG. 4 ), and the anti-rotation mechanism 170 may generally be provided on a sheath on the outer side of the piston 112 department.
  • the anti-rotation mechanism 170 is used to fix the piston 112 to the sheath 160, so as to prevent the change of the magnetic field caused by the rotation of the permanent magnet 120 along its axis caused by the rotation of the piston 112 along its own axis.
  • the structural design of the anti-rotation mechanism 170 will be introduced below with reference to FIG. 4 .
  • FIG. 4 is an example diagram of a three-dimensional structure of an anti-rotation mechanism provided by an embodiment of the present application.
  • the anti-rotation mechanism 170 includes: an anti-rotation member 171 , an anti-rotation groove 172 and an anti-rotation rib 173 .
  • the anti-rotation member 171 is fixed with the fixed piston 112, and is arranged at the end of the piston 112 close to the push rod 111.
  • the anti-rotation member 171 is provided with an anti-rotation groove 172, as shown in FIG. 4(b) .
  • the anti-rotation ribs 173 are provided on the sheath 160, as shown in (a) of FIG. 4 .
  • the anti-rotation groove 172 is matched with the anti-rotation rib 173 .
  • the anti-rotation ribs 173 are just the protrusions of the sheath 160 . Then the anti-rotation groove 172 is matched with the anti-rotation rib 173, that is to say, the anti-rotation rib 173 can be stuck in the anti-rotation groove 172, and the two can no longer perform relative rotational movement after they cooperate with each other.
  • the sheath 160 needs to be fixed on the first hydraulic block 10 .
  • the anti-rotation member is fixed to the piston (meaning that the anti-rotation mechanism is fixed to the piston), while the anti-rotation mechanism is provided on the sheath portion on the outer side of the piston (meaning that the anti-rotation mechanism is also fixed to the piston) Sheath), and the sheath is fixed on the first hydraulic block, so that the piston does not rotate along its own axis; moreover, the permanent magnet is fixed in the piston, so that the permanent magnet does not rotate along its own axis. Therefore, the change of the magnetic field caused by the rotation of the permanent magnet along its own axis can be prevented, and the signal accuracy can be ensured.
  • An embodiment of the present application provides a wire-controlled electronic hydraulic braking system, where the electronic hydraulic braking system includes the above hydraulic braking device.
  • the hydraulic braking device is connected with the brake operating member in the wire-controlled electronic hydraulic braking system, and is used for generating brake hydraulic pressure according to the movement amount of the brake operating member.
  • the above wire-controlled electronic hydraulic braking system may be applied to a vehicle, and the above-mentioned brake operating member may be a foot pedal of the vehicle, which is not limited in this application.
  • the hydraulic braking device When applied in a vehicle, the hydraulic braking device is connected with a foot pedal of the vehicle and used for generating brake hydraulic pressure according to the action amount of the foot pedal to control the stable running of the vehicle.
  • Embodiments of the present application further provide a vehicle, including the above hydraulic brake device or the above wire-controlled electronic hydraulic brake system.
  • the vehicle may be an electric vehicle, for example, a pure electric vehicle, an extended-range electric vehicle, a hybrid electric vehicle, a fuel cell vehicle, a new energy vehicle, etc., which is not specifically limited in this application.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulating Braking Force (AREA)
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Abstract

提供一种液压制动装置及车辆，该液压制动装置可以应用在智能汽车、新能源汽车、网联汽车、智能驾驶汽车等车辆上。该液压制动装置包括第一液压块（10）；主缸部（110），设置于第一液压块（10），主缸部（110）包括推杆（111）、活塞（112）、活塞（112）的主皮碗（113）和活塞（112）的副皮碗（114），活塞（112）与推杆（111）连接；永磁体（120），设置于活塞（112）内部；行程传感器（130），设置于主皮碗（113）与副皮碗（114）之间，用于检测永磁体（120）的移动以确定活塞（112）的移动量。能够使得行程传感器与永磁体之间的距离较小，从而能够保证行程传感器的信号精度。

Description

液压制动装置及车辆 技术领域
本申请涉及车辆领域，并且更具体地，涉及一种液压制动装置及车辆。
背景技术
车辆的制动系统是通过对车辆的车轮施加一定的制动力，从而对其进行一定程度的强制制动的系统。制动系统作用是使行驶中的车辆按照驾驶员或者控制器的要求进行强制减速甚至停车，或者使已停驶的车辆在各种道路条件下(例如，在坡道上)稳定驻车，或者使下坡行驶的车辆速度保持稳定。
电子液压制动系统(electro-hydraulic brake，EHB)作为流行的制动系统通常包含液压制动装置。液压制动装置通常包括主缸部、行程传感器和永磁体等。其中，主缸部用于将推杆的输入力转化为液压，永磁体与推杆随动，使得行程传感器处的磁场发生变化，行程传感器感应此变化，输出电信号。但应注意的是，永磁体与行程传感器之间的距离(气隙)对行程传感器处的磁场强度影响较大，气隙越大时，越不利于保证传感器信号精度。
因此，如何设置永磁体与行程传感器所处的位置以保证传感器信号精度是亟需解决的问题。
发明内容
本申请提供一种液压制动装置及车辆，能够保证行程传感器的信号精度。
第一方面，提供了一种液压制动装置，该液压制动装置包括：第一液压块10；主缸部110，设置于第一液压块10，主缸部110包括推杆111、活塞112、活塞112的主皮碗113和活塞112的副皮碗114，活塞112与推杆111连接；永磁体120，设置于活塞112内部；行程传感器130，设置于主皮碗113与副皮碗114之间，用于检测永磁体120的移动以确定活塞112的移动量。
在本申请实施例所提供的液压制动装置中，永磁体设置于活塞112的内部，行程传感器设置于该活塞的主皮碗与副皮碗之间。使得行程传感器与永磁体之间的距离(气隙)较小，从而能够保证传感器信号精度。
结合第一方面，在第一方面的某些实现方式中，第一液压块10在主皮碗113与副皮碗114之间设置有盲孔11，行程传感器130设置于盲孔11中。
结合第一方面，在第一方面的某些实现方式中，该制动装置还包括：护套160，设置于活塞112外侧，固定于第一液压块10，用于对活塞112进行限位。
在本申请实施例所提供的液压制动装置中，活塞外侧还可以带有护套，用于对该活塞进行限位。
结合第一方面，在第一方面的某些实现方式中，永磁体130固定于活塞112中；制动装置还包括：防转机构170，用于将活塞112固定于护套160，以防止活塞112沿自身轴 线旋转导致永磁体120沿自身轴线旋转引起的磁场变化。
在本申请实施例所提供的液压制动装置中，活塞可以带有防转机构，该防转机构用于将活塞固定于护套。又由于护套固定于第一液压块上，永磁体固定在活塞中。从而能够防止因永磁体沿自身轴线旋转引起的磁场变化，保证信号精度。
结合第一方面，在第一方面的某些实现方式中，防转机构170包括：防转件171，固定于活塞112靠近推杆111一侧的端部；防转凹槽172，设置于防转件171上；防转筋173，设置于护套160，防转筋173为护套160上的凸起部；其中，防转凹槽172与防转筋173匹配。
结合第一方面，在第一方面的某些实现方式中，该制动装置还包括：电磁阀140，电磁阀140与行程传感器130的距离大于或等于目标阈值。
应理解，该目标阈值能够使得电磁阀140泄漏的磁通量不会对行程传感器处的磁场产生影响。
在本申请实施例中，电磁阀与行程传感器的距离大于或等于目标阈值，使得电磁阀泄漏的磁通量不会对行程传感器处的磁场产生影响，从而能够保证传感器的信号稳定性。
结合第一方面，在第一方面的某些实现方式中，该制动装置还包括：第二液压块20，电磁阀140设置于第二液压块20。
在本申请实施例中，电磁阀设置于第二液压块上以远离行程传感器。使得电磁阀泄漏的磁通量不会对行程传感器处的磁场产生影响，从而能够保证传感器的信号稳定性。
结合第一方面，在第一方面的某些实现方式中，行程传感器130包括传感器芯片131和传感器基板132；该制动装置还包括：控制基板150，控制基板150分别与电磁阀140以及传感器基板132呈电性连接。
第二方面，提供了一种线控电子液压系统，包括如第一方面或者第一方面任一可能的实现方式中的液压制动装置。
第三方面，提供了一种车辆，包括如第一方面或者第一方面任一可能的实现方式中的液压制动装置。
附图说明
图1是本申请实施例提供的一种液压制动装置的局部剖面示例图；
图2是本申请实施例提供的一种液压制动装置的立体结构示例图；
图3是本申请实施例提供的一种护套位置结构示例图；
图4是本申请实施例提供的一种防转机构的立体结构示例图。
具体实施方式
在现有的液压制动装置中，永磁体设置在活塞(即与推杆连接的活塞)内部，行程传感器设置在液压制动装置的控制单元壳体内部。其中，永磁体与行程传感器之间间隔活塞壁厚、皮碗高度、主缸壳体壁厚、传感器自身结构件等，使得永磁体与行程传感器之间的距离(气隙)较大，从而对传感器信号精度造成了影响。
基于此，本申请提供了一种液压制动装置，在该液压制动装置中，永磁体设置于与推杆连接的活塞的内部，行程传感器设置于该活塞主皮碗与副皮碗之间，从而能够减小永磁 体与行程传感器之间的距离，进一步能够保证行程传感器的信号精度。
下面将结合附图，对本申请中的技术方案进行描述。
图1是本申请实施例提供的一种液压制动装置的局部剖面示例图。应理解，图1可以为图2的局部剖面图。如图1所示，液压制动装置100包括第一液压块10、主缸部110、永磁体120、行程传感器130。
其中，主缸部110设置于第一液压块10，主缸部110包括推杆111(图1中未示出，可参见图2)、活塞112、活塞112的主皮碗113和活塞的副皮碗114。该活塞112与推杆111连接，因此，该活塞112也可以称为主活塞或推杆活塞。还应理解，下文所述的活塞均为活塞112。
其中，永磁体120设置于活塞112内部。
其中，行程传感器130设置于主皮碗113与副皮碗114之间，用于检测永磁体120的移动以确定活塞112的移动量。
可选地，第一液压块10在主皮碗113与副皮碗114之间设置有盲孔11，行程传感器130则设置于盲孔11中，如图1所示。也就意味着，行程传感器130可以被封闭在第一液压块10中。同时，由于本申请中的行程传感器130单独位于第一液压块10上的盲孔中。因此，在实际操作中，还需要对该行程传感器130进行防护。
可选地，行程传感器130可以为霍尔传感器，也可以为其他传感器，本申请对此不做限定。
应理解，在液压制动装置工作过程中，永磁体120会与推杆111随动，使得行程传感器130处的磁场发生变化，行程传感器130感应此变化，输出电信号。
在本申请实施例所提供的液压制动装置中，永磁体设置于活塞(该活塞为活塞112)的内部，行程传感器设置于活塞的主皮碗与副皮碗之间。使得行程传感器与永磁体之间的距离(气隙)较小，从而能够保证传感器信号精度。
应理解，液压制动装置通常还需要集成电磁阀等会产生大的磁通量泄漏的装置，但当电磁阀与行程传感器距离较近时，电磁阀泄漏的磁通量会对行程传感器处的磁场产生影响，进而影响行程传感器的信号稳定性。
因此，可选地，制动装置100还可以包括：电磁阀140(参见图2)，电磁阀140与行程传感器130的距离大于或等于目标阈值。
应理解，该目标阈值能够使得电磁阀140泄漏的磁通量不会对行程传感器处的磁场产生影响。
应理解，电磁阀140可以设置于第一液压块10上，也可以设置在其他液压块上，只要能保证电磁阀140与行程传感器130的距离大于或等于目标阈值，进而使得电磁阀泄漏的磁通量不会对行程传感器处的磁场产生影响即可。为便于描述，在下文中，以将电磁阀140设置在其他液压块，例如第二液压块20(参见图2)为例进行描述。
可选地，行程传感器130包括传感器芯片131和传感器基板132。
制动装置100还可以包括：控制基板150(参见图2)，控制基板150分别与电磁阀140以及传感器基板132呈电性连接。
基于以上描述，下面将以图2为例对本申请所提供的液压制动装置的结构进行详细介绍。应理解，图2仅仅作为示例，不构成对本申请的限定。
图2是本申请实施例提供的一种液压制动装置的立体结构示例图。如图2所示，该液压制动装置200包括：第一液压块10、第二液压块20、主缸部110、永磁体120、行程传感器130、电磁阀140、控制基板150。
其中，主缸部110设置于第一液压块10，主缸部110包括推杆111、活塞112、活塞112的主皮碗113和活塞112的副皮碗114，该活塞112与推杆111连接。永磁体120设置于活塞112内部。行程传感器130设置于主皮碗113与副皮碗114之间，用于检测永磁体120的移动以确定活塞112的移动量。电磁阀140设置于第二液压块20，以远离行程传感器130。控制基板150分别与电磁阀140以及行程传感器130呈电性连接。
应理解，控制基板150与行程传感器130呈电性连接实际是指控制基板150与行程传感器130中的传感器基板132呈电性连接。
在图2所提供的液压制动装置中，永磁体设置于活塞的内部，行程传感器设置于活塞的主皮碗与副皮碗之间，电磁阀设置于第二液压块且远离行程传感器。一方面，使得行程传感器与永磁体之间的距离(气隙)减少，从而能够保证传感器的信号精度；另一方面，使得电磁阀泄漏的磁通量不会对行程传感器处的磁场产生影响，从而能够保证传感器的信号稳定性。
可选地，本申请所提供的液压制动装置100和200中活塞112外侧还可以带有护套160，如图3所示。该护套160用于对活塞112进行限位。该护套160固定于第一液压块10上。
应理解，本申请所提供的液压制动装置100和200中的永磁体120需要固定在活塞112中，以防止永磁体120与活塞112之间的相对运动。应理解，本申请不限定永磁体120固定在活塞112中的固定方式。
可选地，本申请所提供的液压制动装置100和200中的活塞112还可以带有防转机构170(参见图4)，该防转机构170通常可以设置在活塞112外侧上的护套部。该防转机构170用于将活塞112固定于护套160，以防止活塞112沿自身轴线旋转导致永磁体120沿自身轴线旋转引起的磁场变化。
下面结合图4对该防转机构170的结构设计进行介绍。
图4是本申请实施例提供的一种防转机构的立体结构示例图。如图4中的(a)所示，防转机构170包括：防转件171、防转凹槽172和防转筋173。其中，防转件171与固定活塞112固定，并设置于活塞112靠近推杆111一侧的端部，防转件171上设置有防转凹槽172，如图4中的(b)所示。防转筋173设置在护套160上，如图4中的(a)所示。其中，防转凹槽172与防转筋173相匹配。
应理解，如图4中的(a)所示，防转筋173即就是护套160的凸起部。那么防转凹槽172与防转筋173相匹配，即就是说，防转筋173可以卡在防转凹槽172内，二者相互配合后无法再进行相对旋转运动。
还应理解的是，实际操作中，护套160需要固定于第一液压块10上。
在本申请所提供的防转机构中，防转件固定于活塞(意味着防转机构固定于活塞)，同时防转机构设置于活塞外侧上的护套部(意味着防转机构也固定于护套)，且该护套固定于第一液压块上，使得活塞不会沿自身轴线旋转；而且，永磁体固定在活塞中，使得永磁体不会沿自身轴线旋转。从而能够防止因永磁体沿自身轴线旋转引起的磁场变化，保证 信号精度。
本申请实施例提供了一种线控电子液压制动系统，该电子液压制动系统包括上述液压制动装置。该液压制动装置与线控电子液压制动系统中的制动操作件连接，用于根据制动操作件的动作量产生制动液压。
应理解，上述线控电子液压制动系统可以应用在车辆中，上述制动操作件可以为车辆的脚踏板，本申请对此不做限定。在车辆中应用时，液压制动装置与车辆的与车的脚踏板连接，用于根据脚踏板的动作量产生制动液压以控制车辆稳定行驶。
本申请实施例还提供了一种车辆，包括上述液压制动装置或包括上述线控电子液压制动系统。应理解，车辆可以是电动车辆，例如，纯电动车辆、增程式电动车辆、混合动力电动车辆、燃料电池车辆、新能源车辆等，本申请对此不做具体限定。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (10)

  1. 一种液压制动装置，其特征在于，包括：
    第一液压块(10)；
    主缸部(110)，设置于所述第一液压块(10)，所述主缸部(110)包括推杆(111)、活塞(112)、所述活塞(112)的主皮碗(113)和所述活塞(112)的副皮碗(114)，所述活塞(112)与所述推杆(111)连接；
    永磁体(120)，设置于所述活塞(112)内部；
    行程传感器(130)，设置于所述主皮碗(113)与所述副皮碗(114)之间，用于检测所述永磁体(120)的移动以确定所述活塞(112)的移动量。
  2. 如权利要求1所述的制动装置，其特征在于，所述第一液压块(10)在所述主皮碗(113)与所述副皮碗(114)之间设置有盲孔(11)，所述行程传感器(130)设置于所述盲孔(11)中。
  3. 如权利要求1或2所述的制动装置，其特征在于，所述制动装置还包括：
    护套(160)，设置于所述活塞(112)外侧，固定于所述第一液压块(10)，用于对所述活塞(112)进行限位。
  4. 如权利要求3所述的制动装置，其特征在于，所述永磁体(130)固定于所述活塞(112)中；所述制动装置还包括：
    防转机构(170)，用于将所述活塞(112)固定于所述护套(160)，以防止所述活塞(112)沿自身轴线旋转导致所述永磁体(120)沿自身轴线旋转引起的磁场变化。
  5. 如权利要求4所述的制动装置，其特征在于，所述防转机构(170)包括：
    防转件(171)，固定于所述活塞(112)靠近推杆(111)一侧的端部；
    防转凹槽(172)，设置于所述防转件(171)上；
    防转筋(173)，设置于所述护套(160)，所述防转筋(173)为所述护套(160)上的凸起部；
    其中，所述防转凹槽(172)与所述防转筋(173)匹配。
  6. 如权利要求1至5中任一项所述的制动装置，其特征在于，所述制动装置还包括：
    电磁阀(140)，所述电磁阀(140)与所述行程传感器(130)的距离大于或等于目标阈值。
  7. 如权利要求6所述的制动装置，其特征在于，所述制动装置还包括：
    第二液压块(20)，所述电磁阀(140)设置于所述第二液压块(20)。
  8. 如权利要求6或7所述的制动装置，其特征在于，所述行程传感器(130)包括传感器芯片(131)和传感器基板(132)；所述制动装置还包括：
    控制基板(150)，所述控制基板(150)分别与所述电磁阀(140)以及所述传感器基板(132)呈电性连接。
  9. 一种线控电子液压系统，其特征在于，包括如权利要求1至8中任一项所述的液压制动装置。
  10. 一种车辆，其特征在于，包括如权利要求1至8中任一项所述的液压制动装置。
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WO2023015472A1 (zh) * 2021-08-11 2023-02-16 华为技术有限公司 液压制动装置、行程传感器及车辆
KR20240091070A (ko) * 2021-10-30 2024-06-21 후아웨이 테크놀러지 컴퍼니 리미티드 제동 장치, 제동 시스템 및 차량
CN118043245A (zh) * 2022-03-02 2024-05-14 华为技术有限公司 一种制动装置及制动系统

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