WO2017026472A1 - Système de frein électrique - Google Patents

Système de frein électrique Download PDF

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Publication number
WO2017026472A1
WO2017026472A1 PCT/JP2016/073396 JP2016073396W WO2017026472A1 WO 2017026472 A1 WO2017026472 A1 WO 2017026472A1 JP 2016073396 W JP2016073396 W JP 2016073396W WO 2017026472 A1 WO2017026472 A1 WO 2017026472A1
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WO
WIPO (PCT)
Prior art keywords
brake
power supply
electric
parking
parking brake
Prior art date
Application number
PCT/JP2016/073396
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English (en)
Japanese (ja)
Inventor
唯 増田
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Ntn株式会社
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Filing date
Publication date
Application filed by Ntn株式会社 filed Critical Ntn株式会社
Publication of WO2017026472A1 publication Critical patent/WO2017026472A1/fr

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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
    • B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes

Definitions

  • This invention relates to an electric brake system having a parking brake function.
  • An electric brake device that controls braking force with an electric motor (Patent Document 1).
  • a disc brake that detects friction pad pressing force (Patent Document 2).
  • a ball screw type electric brake device using a member having a low thermal conductivity for the ball screw ball (Patent Document 3).
  • a parking brake mechanism using a solenoid (Patent Document 4).
  • Patent Documents 3 and 4 propose a mechanism that maintains braking force without consuming electric power by engaging each brake component that generates braking force.
  • the engaging portion must be separated once for changing the braking force. For this reason, it takes time to change the braking force, the change cannot be made quickly, and the brake feeling may deteriorate.
  • An object of the present invention is to perform a necessary brake operation with the assistance of electric power from an auxiliary power source even when the power supply state of the power supply device is reduced, and to perform a brake operation while appropriately using a parking brake mechanism. Electricity that can reduce power consumption, is particularly effective in extending the brake operation time when using an auxiliary power supply, and can minimize the impact on the brake performance and feeling of using the parking brake mechanism. Is to provide a braking system.
  • the electric brake system includes an electric brake device 1 and a power supply device 19 that supplies electric power to the electric brake device 1.
  • the electric brake device 1 includes a brake rotor 6, a friction material 7, friction material operation means 8 for bringing the friction material 7 into contact with the brake rotor 6, an electric motor 9 for driving the friction material operation means 8, and the electric motor
  • An electric brake actuator 2 having a parking brake mechanism 5 that retains a predetermined braking force by mechanical engagement in a drive transmission portion 8b from 9 to the friction material 7 and a brake by controlling the electric motor 9
  • An electric brake system having a main brake control means 21 for controlling the force to follow a target value, and a brake control device 3 having a parking brake control means 22 for controlling the parking brake mechanism 5,
  • Auxiliary power supply 25 different from the power supply device 19 a power supply control device 24 capable of changing a ratio used between the power of the power supply device 19 and the power of the auxiliary power supply 25, and power supply by the power supply device 19
  • the parking brake mechanism 5 has a function of operating the parking brake mechanism 5 based on a predetermined determination without the operation of the operator of the vehicle on which the electric brake device 1 is mounted. That.
  • predetermined determination is determined by design as appropriate for the detected value, calculated value, target value, or physical quantity of the control target to be used, and what state to determine. It ’s fine.
  • the power supply state falls below a predetermined state includes, for example, that the power supply amount falls below (or below) a predetermined threshold value. The threshold is determined from simulation results, experimental results, actual measurement results, and the like (hereinafter the same).
  • the auxiliary power source 25 different from the main power source device 19 (hereinafter sometimes referred to as “main power source device 19”) and the auxiliary power source 25 when the power supply state falls below a predetermined state. Since the power supply control device 24 is used to supplement the power of the power supply 25 and used to drive the electric motor 9, even if the output voltage of the main power supply device 19 decreases due to a decrease in the amount of stored power, the power of the auxiliary power supply 25 Is added to the output of the main power supply device 19, and the normal braking operation can be performed properly. Since the auxiliary power supply 25 is arranged in parallel with the main power supply device 19, if the power capacity is large, an excessive configuration results in an increase in cost and weight, and thus the power capacity needs to be suppressed.
  • the parking brake mechanism 5 is configured to hold the braking force by mechanical engagement in the drive transmission portion, it is possible to hold the braking force with almost no power consumption, and the parking brake.
  • the control means 22 operates the parking brake mechanism 5 in a situation where the auxiliary power supply 25 is used, based on a predetermined determination, without the operation of the driver of the vehicle equipped with the electric brake device 1. Therefore, power consumption can be reduced without any particular attention from the driver.
  • the brake operation is performed while using the parking brake mechanism 5 as appropriate, thereby reducing the power consumption, and in particular, extending the grace time until the brake failure due to the power depletion of the auxiliary power supply 25 when the auxiliary power supply 25 is used.
  • redundancy can be improved. For this reason, even if the output voltage decreases due to a decrease in the amount of power stored in the main power supply device 19 or the like, the vehicle can be driven to a place where repair or maintenance is possible, and the main power supply device 19 can be We can expect charge.
  • the use of the parking brake mechanism 5 during traveling reduces power consumption, the feeling of braking operation is reduced.
  • the parking brake mechanism 5 is used in a situation where the auxiliary power source 25 is used. Based on a predetermined judgment.
  • the parking brake mechanism 5 since the conditions which use the parking brake mechanism 5 are limited to the limited conditions, the fall of the feeling of brake operation is suppressed compared with the case where the parking brake mechanism 5 is used frequently.
  • the parking brake mechanism 5 can be used only when the braking is important and the operation feeling is not questioned depending on the setting contents of the predetermined judgment.
  • the predetermined determination is made based on at least one of a target brake force, a change amount of the target brake force, an estimated brake force, and a change amount of the estimated brake force.
  • the brake control unit 22 performs the parking in the operation time of the electric brake device 1. You may make it increase the time for which the brake mechanism 5 is functioned.
  • any one of the target braking force and the estimated braking force can be used.
  • the increase in the braking force may be either the target braking force or the estimated braking force.
  • the frequency change condition for example, the amount of change in the target brake force or the estimated brake force can be used. The smaller the amount of change, the less the need to change the braking force, and the smaller the amount of change, the smaller the effect on the braking performance when using a parking brake. Conceivable.
  • the parking brake control means 22 makes the predetermined determination based on the remaining power of the auxiliary power supply 25, and when the remaining power of the auxiliary power supply 25 decreases, the operation time of the electric brake device 1 is reduced.
  • the ratio of the time for executing the parking brake mechanism 5 may be increased.
  • the remaining power of the auxiliary power source 25 decreases, it is necessary to extend the brake operation possible time even at the expense of brake feeling. Therefore, it is preferable to perform a process in which the frequency of parking braking increases as the remaining power decreases. Conceivable.
  • the frequency of applying the parking brake mechanism 5 stepwise in accordance with the remaining power of the auxiliary power supply 25 By adjusting the frequency of applying the parking brake mechanism 5 stepwise in accordance with the remaining power of the auxiliary power supply 25, the grace time until brake failure due to power depletion of the auxiliary power supply 25 is maintained while maintaining the brake feeling as much as possible. And the redundancy can be improved.
  • the parking brake control means 22 includes a vehicle speed estimation means 29 of a vehicle on which the electric brake device 1 is mounted, and makes the predetermined determination based on the vehicle speed of the vehicle on which the electric brake device 1 is mounted.
  • the ratio of the time during which the parking brake mechanism 5 functions in the operation time of the electric brake device 1 may be increased.
  • the vehicle speed is approximately zero, that is, when the vehicle is stopped, it is not necessary to change the braking force. Therefore, it is considered preferable to perform parking braking with a sufficient braking force to stop the vehicle. At that time, for example, when the driving force of the vehicle is lost, it is not necessary to release the parking brake, so it is only necessary to keep the parking brake.
  • the parking brake control means 22 selects and executes one of the predetermined judgments and the processes based on the judgment results for the processes based on the predetermined judgments and the judgment results. Alternatively, two or more may be executed in appropriate combination.
  • the parking brake control means 22 follows the operation of the brake operation means 31 by the driver when the parking brake mechanism 5 is caused to function regardless of the operation of the operator based on the predetermined determination.
  • the percentage of time that the parking brake mechanism 5 to function reduce power consumption
  • the ratio between the degree and the control that places importance on the feeling of operation can be easily changed.
  • the driving force monitoring means 32 for estimating the state of the driving force of the vehicle on which the electric brake device 1 is mounted is provided, and the parking brake control means 22
  • the parking brake control means 22 When it is determined that the vehicle is equipped with the electric brake device 1 and is substantially stopped, it is determined that the parking brake mechanism 5 remains functioning and the vehicle stopped state is maintained. It may be continued.
  • the driving force of the vehicle is lost, the vehicle does not travel again after the vehicle has been stopped by the brake. Therefore, the parking brake mechanism 5 is kept functioning so that the vehicle can be safely stopped.
  • the parking brake mechanism 5 engages with each other out of the parts constituting the drive transmission portion 8b from the electric motor 9 to the friction material 7 and the stationary parts, thereby moving the friction member in the loosening direction. Between the parts that prevent movement, the engaging part that engages both parts and the matched part are engaged, and the pressing force of the friction material 7 is maintained regardless of the power of the electric motor 9. May be.
  • the parking brake mechanism 5 is configured to prevent the movement by engaging the parts, so that the braking force can be maintained with almost no power consumption.
  • FIG. 1 is a block diagram showing a conceptual configuration of an electric brake system according to an embodiment of the present invention. It is explanatory drawing of schematic structure of the electric brake device in the same electric brake system. It is explanatory drawing of the parking brake mechanism in the same electric brake device. It is a flowchart of the control action of the parking brake control means of the electric brake system.
  • the electric brake system includes an electric brake device 1 and a power supply device 19 that supplies electric power to the electric brake device 1, and is operated by a braking command or the like from the host ECU 20.
  • the electric brake device 1 includes an electric brake actuator 2 that is a mechanical part, and a brake control device 3 that controls the electric brake actuator 2.
  • the electric brake actuator 2 has a parking brake mechanism 5 that causes the main brake part 4 to function as a parking brake in addition to the main brake part 4 capable of controlling the braking force. Further, the electric brake actuator 2 is provided with a sensor 14 for detecting the state with a predetermined characteristic value such as a rotor angle of an electric motor 9 described later and a degree of distortion in the brake housing.
  • the brake control device 3 controls the electric motor 9 of the electric brake actuator 2 so as to control the brake force (for example, service brake force) following the target value.
  • brake force for example, service brake force
  • parking brake control means 22 for controlling the parking brake mechanism 5.
  • an auxiliary power source 25 is provided separately from the power source device 19, and the power control that can change the ratio used between the power of the power source device 19 and the power of the auxiliary power source 25.
  • the power supply control device 24 is powered by the power of the auxiliary power supply 25.
  • a power supply monitoring control means 23 configured to supply the power supply device 19 by compensating for the shortage of the power supply.
  • the parking brake control means 22 is equipped with the electric brake device 1 on the basis of a predetermined judgment in a situation where the power supply control device 24 compensates for the shortage of the supplied power using the auxiliary power supply 25. A function of operating the parking brake mechanism 5 without the operation of the driver.
  • the “predetermined determination” is determined by design as appropriate for the detected value, calculated value, target value, or physical quantity of the control target to be used, and what state to determine. It ’s fine. “The power supply state falls below a predetermined state” includes, for example, that the power supply amount falls below (or below) a predetermined threshold value. Moreover, this figure shows only the structure for implement
  • FIG. 2 shows an example of the electric brake actuator 2.
  • a rake rotor 6 that rotates integrally with a wheel (not shown) of a vehicle such as an automobile, a friction material 7, and the friction material 7 are brought into contact with the brake rotor 6 (for example, the friction material 7
  • the main brake portion 4 is composed of a friction material operating means 8 that moves the friction material operating means 8 in a direction in contact with the brake rotor 6 and an electric motor 9 that drives the friction material operating means 8.
  • the friction material operating means 8 comprises a feed screw mechanism or the like, and drives the linear motion mechanism 8a by decelerating and transmitting the rotation of the electric motor 9 and the linear motion mechanism 8a that can move in the direction of the arrow in the figure.
  • a reduction gear 8b In the illustrated example, the speed reducer 8 b includes a gear train, and includes a primary gear 12, an intermediate (secondary) gear 13, and a tertiary gear 11.
  • the speed reduction mechanism 8b is a tertiary gear fixed to the rotation shaft 8aa of the linear motion mechanism 8a via the intermediate gear 13 by rotating the primary gear 12 attached to the rotor shaft 9a of the electric motor 9. 11 can be transmitted.
  • the parking brake mechanism 5 is a drive transmission portion between the electric motor 9 and the friction material 7, for example, a reduction gear 8b, which is a part of the friction material operating means 8, and a brake housing (not shown).
  • a mechanism for holding a predetermined braking force (described later) by mechanical engagement is provided.
  • the parts that constitute the drive transmission unit from the electric motor 9 to the friction material 7 and the stationary parts the parts that prevent the friction member 7 from moving in the loosening direction by engaging each other, The engaging part that engages both parts and the engaged part are engaged, and the pressing force of the friction material 7 is maintained regardless of the power of the electric motor 9.
  • FIG. 3 is a diagram showing an outline of the parking brake mechanism 5 in a side view.
  • a plurality (six in this example) of locking holes 17 that are engaged portions are formed at regular intervals in the circumferential direction.
  • Each locking hole 17 is formed in a long hole shape extending along the circumferential direction.
  • an advancing / retracting lock member 15 which is an engaging portion, is configured to be locked.
  • the lock member 15 is driven back and forth by an engagement / disengagement drive source 16 (FIG. 2).
  • a solenoid is applied to the engagement / disengagement drive source 16.
  • the locking member 15 is advanced by the engagement / disengagement drive source 16 and is fitted into the bottomed cylindrical hole 17a of the locking hole 17 formed in the intermediate gear 13, thereby being locked to the bottomed cylindrical hole 17a.
  • a predetermined braking force that is, the braking force at this time is maintained. That is, a drive transmission part (intermediate gear 13 or the like) including the speed reducer 8b is engaged with a brake housing (not shown) in which the engagement / disengagement drive source 16 is installed.
  • the parking lock state is realized. By retracting part or all of the lock member 15 and detaching it from the locking hole 17 (FIG. 3), the rotation of the intermediate gear 13 is allowed and the unlocked state is established.
  • the engagement / disengagement drive source 16 of the parking brake mechanism 5 uses a solenoid in this example, but may be constituted by an electric motor such as a DC motor and a linear motion mechanism, for example. It is considered that the parking brake mechanism 5 is inexpensive and suitable when a mechanism that engages the torque transmission unit such as the drive transmission unit 8b (reduction gear 8b) with the housing using the solenoid or the DC motor is used.
  • the linear motion mechanism 8a can use a mechanism that converts a rotational motion such as a ramp mechanism into a straight motion.
  • the reduction gear 8b is considered to be inexpensive and suitable if a parallel gear as in the example of FIG. 3 is used, but a planetary gear, a worm gear, or the like can also be used, and the reduction gear 8b may not be used depending on the required thrust. .
  • the sensor 14 includes, for example, an angle sensor that detects the angle of the electric motor 9, a brake force sensor, and the like because highly accurate control can be realized.
  • the power supply device 19 is a low-voltage power supply in an automobile, for example, it can be realized at a low cost and is considered preferable.
  • the auxiliary power source 25 for example, a power storage device such as a battery or a capacitor can be used.
  • the auxiliary power supply 25, the power supply control device 24, and the power supply monitoring control means 23, which will be described in detail later, are installed in the electric brake actuator 1 of the electric brake device 1 instead of being installed in the electric brake device 1.
  • the electric brake actuator 2 may be provided at a location different from that of the electric brake actuator 2.
  • the brake control device 3 is mounted with a small capacitor and a control circuit around the brake control device 3 as shown in FIG. It can be expected that it is suitable.
  • the host ECU (also referred to as “VCU”) 20 is operated according to the operation of the brake operation means 31 operated by a driver such as a brake pedal, or the stability such as automatic driving, collision control, attitude control, ABS control,
  • the electronic control unit has a function of giving a braking command to the electric brake device 1 in accordance with a braking command generated by a control means (not shown) for ensuring safety.
  • the host ECU 20 may be, for example, a main electronic control unit that performs overall cooperative control and overall control in an automobile. In this case, the integrated ECU (see FIG. (Not shown) may be provided separately from the main ECU.
  • the brake control device 3 includes an arithmetic unit 26, and further includes a motor driver 27, a parking brake mechanism drive device 28, and the power supply control device 24.
  • the calculator 26 is provided with the main brake control means 21, the parking brake control means 22, and the power supply monitoring control means 23.
  • the computing unit 26 may be implemented by, for example, a microcomputer, FPGA, ASIC, DSP, etc., and it is considered preferable because it can easily implement complicated control functions.
  • the motor driver 27 is a circuit that causes a motor current to flow to the electric motor 9 in accordance with the motor drive command output by the main brake control means 21.
  • the parking brake mechanism driving device 28 is means for supplying driving power for the parking brake mechanism 5 in accordance with the output of the parking brake control means 22.
  • the driving source of the parking brake mechanism 5 in the electric brake actuator 2 is a solenoid. If there is a switch or the like, and an electric motor such as a DC motor is mounted by a half bridge circuit or the like, it is considered inexpensive and suitable.
  • the power supply control device 24 has a function of supplying the power supplied from the power supply device 19 and the auxiliary power supply 25 to the entire brake control device 3 and the electric brake actuator 2. Each current control circuit may be provided, or a switch that simply switches the outputs of the two may be used.
  • the power supply control device 24 may be provided with a circuit that charges the auxiliary power supply 25 with the power supply device 19.
  • the calculator 26 is provided with the main brake control means 21, the parking brake control means 22, and the power supply monitoring control means 23 as described above.
  • the main brake control means 21 determines the drive power of the electric motor 9 for causing the brake force to follow the target value by feedforward control or feedback control according to the target value of the brake force given from the host ECU 20 or the like.
  • the motor driver 27 outputs drive power to the electric motor 9 according to the determined drive power.
  • the parking brake control means 22 uses the above-described engagement method for maintaining the braking force as the parking brake, and controls the brake of the main brake unit 4 so as to maintain the braking force of the service brake at the target braking force.
  • the parking brake mechanism 5 is operated in conjunction.
  • the parking brake control means 22 performs the process specifically shown by the flowchart of FIG.
  • the power supply monitoring control means 23 monitors the power supply status of the power supply device 19 and the auxiliary power supply 25, and uses the auxiliary power supply 25 to reduce the power supply when the power supply from the power supply device 19 drops below a predetermined threshold, for example.
  • the power supply control device 24 changes the ratio of using the power of the auxiliary power supply 25 so as to supplement the power.
  • the power supply monitoring control unit 23 performs a process of appropriately charging the auxiliary power supply 25 with the power of the power supply device 19 using the power supply control device 24 when the power supply from the power supply device 19 is, for example, a threshold value or more. Do.
  • FIG. 4 shows an example of processing performed by the parking brake control means 22 (FIG. 1) in the electric brake system having the above configuration.
  • step f1 it is determined whether or not the braking mode of the electric brake system is a normal braking mode in which the braking force is controlled to follow the target value.
  • the counter value C bs for calculating the duration of the normal braking mode is added by a certain value (for example, 1) (step f2), and the counter value C bs is calculated from the threshold value (threshold) C ths . Is also larger (step f3). If it is equal to or less than the threshold value, the braking mode of the electric brake device 1 is maintained in the normal braking mode (step f4), the process is terminated, and the process of FIG.
  • the braking force of the parking braking force is set to the current braking force F r (k) (step f5), and the braking mode is set to the parking braking mode. (Step f6). Thereafter, the counter value C bs is reset to zero (step f7), the process is terminated, and the process of FIG.
  • a counter value Cps for measuring the duration of parking braking is added by a certain value (for example, 1) (step f8), and the counter value Cps is a threshold value (threshold). It is determined whether it is greater than C thp (step f9).
  • the processing is terminated while the braking mode is set to the parking braking mode (step f10), and the processing of FIG.
  • a deviation ⁇ F between the target brake force F r (k) and the estimated brake force F b (k) is obtained (step f11).
  • the estimated brake force F b (k) is determined from the measured value of the sensor 14 (FIG. 1) included in the electric brake actuator 2.
  • the absolute value of the deviation ⁇ F is compared with a threshold value (threshold) Fth for changing the braking force (step f12). If the absolute value of the deviation ⁇ F is the threshold F th below the process ends while maintaining the braking mode to the parking brake (step f10), it performs the processing of FIG from the first step f1. Is determined in step f12, the absolute value of the deviation ⁇ F exceeds the threshold value F th, sets the braking mode to the normal braking mode (step f13), reset to zero the counter value C ps (step f14), the processing Exit. Such processing is always repeated.
  • a threshold value (threshold) Fth for changing the braking force
  • the threshold C ths of each counter by adjusting the value of C thp, it is possible to change the frequency of entering the parking brake mode. For example, when the frequency is increased, power consumption can be suppressed, and when the frequency is decreased, the brake control accuracy is improved. Therefore, for example, when the above-described processing for increasing the parking braking frequency is performed at the time of redundant control in which power consumption must be suppressed, it is considered preferable that the power of the auxiliary power supply 25 can be used for a long time.
  • either target braking force or estimated braking force can be used.
  • the processing in which the frequency of parking braking increases as the braking force increases since the power consumption tends to increase as the braking force increases, it is considered preferable to set the processing in which the frequency of parking braking increases as the braking force increases.
  • the amount of change in the target braking force or the estimated braking force can be used as the condition for changing the parking braking frequency.
  • the parking brake control means 22 is used in a situation where the auxiliary power supply 25 is used under the control of the power supply control device 24 in order to compensate for the shortage of the supplied power.
  • the parking brake mechanism 5 is operated based on the determination.
  • the predetermined determination is at least one of the target brake force, the target brake force change amount, the estimated brake force, and the estimated brake force change amount.
  • the parking brake control means 22 increases the target brake force or the estimated brake force, or the amount of change in either the target brake force or the estimated brake force is greater than the threshold value. Is also decreased, the time for the parking brake mechanism 5 to function during the operation time of the electric brake device 1 is increased. And it may be.
  • the remaining power of the auxiliary power supply 25 shown in FIG. 1 can be used as the condition for changing the parking braking frequency.
  • the parking brake control means 22 makes a predetermined determination as to whether or not to operate the parking brake mechanism 5 based on the remaining power of the auxiliary power source 25, and the remaining power of the auxiliary power source 25 decreases.
  • the ratio of the time for executing the parking brake mechanism 5 in the operation time of the electric brake device 1 may be increased.
  • the remaining power of the auxiliary power source 25 decreases, it is necessary to extend the brake operation possible time even at the expense of brake feeling. Therefore, it is preferable to perform a process in which the frequency of parking braking increases as the remaining power decreases. Conceivable.
  • the vehicle speed of a vehicle equipped with an electric brake system can be used.
  • the parking brake control means 22 makes a predetermined determination as to whether or not to operate the parking brake mechanism 5 based on the vehicle speed of the vehicle on which the electric brake device 1 is mounted, and when the vehicle speed decreases, You may make it raise the ratio of the time which makes the said parking brake mechanism 5 function in the operation time of the electric brake device 1.
  • FIG. 1 the vehicle speed estimation means 29 for estimating the vehicle speed is used, and the vehicle speed estimation means 29 is, for example, a means for detecting rotation of a driven wheel and converting it to a vehicle speed.
  • the process of increasing the parking braking frequency as the vehicle speed decreases is considered preferable.
  • the vehicle speed is approximately zero, that is, when the vehicle is stopped, it is not necessary to change the braking force. Therefore, it is considered preferable to perform parking braking with a sufficient braking force to stop the vehicle. At that time, for example, when the driving force of the vehicle is lost, it is not necessary to release the parking brake, so it is only necessary to keep the parking brake.
  • the parking brake control means 22 performs normal braking following the operation of the brake operation means 31 by the driver when the parking brake mechanism 5 is made to function regardless of the operation of the operator based on the predetermined determination.
  • C thp step f9 in FIG. 4
  • the ratio of the time during which the parking brake mechanism 5 functions can be adjusted by changing the normal braking time upper limit value and the parking braking time lower limit value. Also good.
  • the electric brake system includes a driving force monitoring unit 32 that estimates a driving force state of a vehicle on which the electric braking device 1 is mounted, and the parking brake control unit 22
  • the driving force monitoring means 32 determines that the driving force of the vehicle is below a predetermined value and it is determined that the vehicle on which the electric brake device 1 is mounted is substantially stopped
  • the parking brake mechanism 5 is functioned. You may make it continue maintaining a vehicle stop state with letting it be left.
  • the driving force monitoring means 32 is provided in the calculator 26 of the brake control device 3, for example. When the driving force of the vehicle is lost, the vehicle does not travel again after the vehicle has been stopped by the brake. Therefore, the parking brake mechanism 5 is kept functioning so that the vehicle can be safely stopped.
  • the frequency of parking braking can be changed by appropriately processing one or more of the above processes. Several processes may be executed in parallel, and any one process may be selected.
  • the main brake control means 21, the parking brake control means 22, the power supply monitoring control means 23, the current control circuit in the power supply control device 24, and the driving force monitoring means 32 described above are specifically software or hardware.
  • LUT Look Up Table
  • the software library Library
  • equivalent hardware etc.
  • comparison functions and four arithmetic operations functions It is composed of a hardware circuit or a software function on a processor (not shown) that can perform an operation and output a result using equivalent hardware or the like.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulating Braking Force (AREA)
  • Braking Systems And Boosters (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Braking Arrangements (AREA)

Abstract

L'invention concerne un frein, pouvant être actionné tout en utilisant de manière appropriée un mécanisme de frein de stationnement, réduisant la consommation de puissance, prolongeant une durée de fonctionnement du frein de manière efficace, notamment lorsqu'une alimentation en puissance auxiliaire est utilisée et réduisant au maximum les effets sur les performances et la sensation du frein pendant l'utilisation du frein de stationnement. Le système de frein électrique comprend un mécanisme (5) de frein de stationnement qui maintient la force de freinage par mise en prise mécanique. Le système de frein électrique comprend une alimentation en puissance auxiliaire (25) en plus d'un dispositif d'alimentation en puissance principal (19), ainsi qu'un dispositif de commande d'alimentation en puissance (24) qui commute pour décider d'utiliser l'alimentation en puissance auxiliaire (25). Un moyen de commande de surveillance de puissance (23) est prévu, qui surveille l'état d'alimentation en puissance et assiste le maintien de l'alimentation en puissance par le biais de l'alimentation en puissance auxiliaire (25) lorsqu'il est déterminé que l'état d'alimentation en puissance est inférieur à un état prédéfini. Le mécanisme (5) de frein de stationnement est conçu pour être actionné sans manipulation d'un conducteur pendant que l'alimentation en puissance auxiliaire (25) est utilisée.
PCT/JP2016/073396 2015-08-11 2016-08-09 Système de frein électrique WO2017026472A1 (fr)

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CN109435875A (zh) * 2018-11-12 2019-03-08 天津清智科技有限公司 一种无人驾驶汽车底盘供电系统备份方法
CN109466524A (zh) * 2018-12-28 2019-03-15 上汽通用五菱汽车股份有限公司 汽车多级制动方法、汽车和存储介质
WO2020193420A1 (fr) * 2019-03-25 2020-10-01 Haldex Vie (Shanghai) Electromechanical Brake System Co., Ltd. Procédé de commande d'un actionneur, actionneur et système de frein électromécanique
WO2023040368A1 (fr) * 2021-09-17 2023-03-23 精进电动科技股份有限公司 Système d'alimentation électrique de secours pour dispositif de commande de stationnement

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JP6819524B2 (ja) * 2017-09-20 2021-01-27 トヨタ自動車株式会社 電動ブレーキ装置
JP2019064470A (ja) * 2017-10-02 2019-04-25 日立オートモティブシステムズ株式会社 自動車のブレーキシステム
JP7308070B2 (ja) 2019-04-26 2023-07-13 ナブテスコ株式会社 ブレーキ装置およびブレーキ制御システム

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JPH11171006A (ja) * 1997-12-11 1999-06-29 Toyota Motor Corp 電動式ブレーキ装置
JP2008298016A (ja) * 2007-06-01 2008-12-11 Toyota Motor Corp 車両制御システム
JP2012087889A (ja) * 2010-10-20 2012-05-10 Ntn Corp 電動式直動アクチュエータおよび電動式ディスクブレーキ装置

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JPH11171006A (ja) * 1997-12-11 1999-06-29 Toyota Motor Corp 電動式ブレーキ装置
JP2008298016A (ja) * 2007-06-01 2008-12-11 Toyota Motor Corp 車両制御システム
JP2012087889A (ja) * 2010-10-20 2012-05-10 Ntn Corp 電動式直動アクチュエータおよび電動式ディスクブレーキ装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109435875A (zh) * 2018-11-12 2019-03-08 天津清智科技有限公司 一种无人驾驶汽车底盘供电系统备份方法
CN109466524A (zh) * 2018-12-28 2019-03-15 上汽通用五菱汽车股份有限公司 汽车多级制动方法、汽车和存储介质
WO2020193420A1 (fr) * 2019-03-25 2020-10-01 Haldex Vie (Shanghai) Electromechanical Brake System Co., Ltd. Procédé de commande d'un actionneur, actionneur et système de frein électromécanique
WO2023040368A1 (fr) * 2021-09-17 2023-03-23 精进电动科技股份有限公司 Système d'alimentation électrique de secours pour dispositif de commande de stationnement

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