CN112277914A - Control method and device of hydraulic power-assisted brake system - Google Patents

Control method and device of hydraulic power-assisted brake system Download PDF

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Publication number
CN112277914A
CN112277914A CN202011059040.5A CN202011059040A CN112277914A CN 112277914 A CN112277914 A CN 112277914A CN 202011059040 A CN202011059040 A CN 202011059040A CN 112277914 A CN112277914 A CN 112277914A
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China
Prior art keywords
vehicle
preset
hydraulic pump
rotating speed
electric hydraulic
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Granted
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CN202011059040.5A
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Chinese (zh)
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CN112277914B (en
Inventor
薛洪康
姜松林
卢彦温
赵雪松
何常清
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Beiqi Foton Motor Co Ltd
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Beiqi Foton Motor Co Ltd
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Priority to CN202011059040.5A priority Critical patent/CN112277914B/en
Publication of CN112277914A publication Critical patent/CN112277914A/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
    • 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
    • B60T13/16—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 pumps directly, i.e. without interposition of accumulators or reservoirs
    • B60T13/20—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 pumps directly, i.e. without interposition of accumulators or reservoirs with control of pump driving means
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/18009—Propelling the vehicle related to particular drive situations
    • B60W30/18109—Braking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2300/00—Indexing codes relating to the type of vehicle
    • B60W2300/12—Trucks; Load vehicles
    • B60W2300/123—Light trucks

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Regulating Braking Force (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

The application discloses a control method and device of a hydraulic power-assisted brake system, and relates to the technical field of vehicle control. The method comprises the following steps: when the brake pedal signal and the starting signal of the vehicle are acquired and the vehicle is changed from the parking gear state to the parking gear state, detecting that a first duration of operation at a first predetermined speed is greater than or equal to a first predetermined duration, the electric hydraulic pump is controlled to operate at a second preset rotation speed, which is less than the first preset rotation speed, in the present application, if a first duration for which an electric hydraulic pump in a vehicle is operated at a higher first preset rotational speed in a park position state is greater than or equal to a first preset duration, it indicates that the vehicle has not moved for a longer period of time, at which point the electric hydraulic pump may be controlled to operate at a second, lower preset speed, therefore, the energy consumption of the electric hydraulic pump is reduced, the cruising performance of the electric vehicle is improved, the noise generated by the electric hydraulic pump is reduced, and the use experience of a user in the vehicle is improved.

Description

Control method and device of hydraulic power-assisted brake system
Technical Field
The application belongs to the technical field of vehicle control, and particularly relates to a control method and device of a hydraulic power-assisted brake system.
Background
In recent years, with the increasing severity of energy crisis and environmental pollution, the technology of electric vehicles has been developed rapidly, and most of the current braking systems for light trucks adopt hydraulic transmission braking systems.
The hydraulic transmission braking system of the existing light truck vehicle mostly adopts a fixed frequency control method, under the condition that the electric vehicle is started, a power supply such as a vehicle-mounted battery supplies power to a motor controller, so that the motor controller can control a motor to work at a constant rotating speed according to a control instruction, and drive an electric hydraulic pump mechanically connected with the motor to continuously work at the constant rotating speed, so that the electric hydraulic pump can control the flow of liquid in a liquid storage tank under the working state of higher constant rotating speed, thereby rapidly providing higher oil pressure for a hydraulic booster, further rapidly realizing the braking of the automobile, and simultaneously, in order to ensure that the hydraulic booster can rapidly realize the braking of the automobile under the state of higher-speed driving, the motor is required to drive the electric hydraulic pump to work at higher rotating speed, thereby rapidly providing higher oil pressure for the hydraulic booster in a short time, and realizing emergency braking.
However, in the current scheme, the electric hydraulic pump continuously working at a high rotation speed consumes a large amount of energy, which affects the cruising performance of the electric vehicle, and generates a large noise, which affects the user experience.
Disclosure of Invention
The embodiment of the application provides a control method and a control device of a hydraulic power-assisted braking system, which are used for solving the problems that when an electric hydraulic pump of a vehicle continuously works at a high rotating speed in the prior art, the electric hydraulic pump consumes large energy, the cruising performance of the vehicle is influenced, and large noise is generated.
In order to solve the technical problem, an embodiment of the present application discloses a control method for a hydraulic power-assisted brake system, including:
under the condition of acquiring a brake pedal signal and a starting signal of a vehicle, acquiring gear information of the vehicle;
under the condition that the gear information is changed from a parking gear state to a parking gear state, controlling an electric hydraulic pump of the vehicle to work at a first preset rotating speed;
and controlling the electric hydraulic pump of the vehicle to work at a second preset rotating speed under the condition that a first duration time for which the electric hydraulic pump works at the first preset rotating speed in the parking gear state is detected to be longer than or equal to a first preset time, wherein the second preset rotating speed is less than the first preset rotating speed.
In order to solve the above technical problem, an embodiment of the present application further discloses a control device of a hydraulic power-assisted brake system, the device including:
the system comprises an acquisition module, a starting module and a control module, wherein the acquisition module is used for acquiring gear information of a vehicle under the condition of acquiring a brake pedal signal and a starting signal of the vehicle;
the first control module is used for controlling an electric hydraulic pump of the vehicle to work at a first preset rotating speed under the condition that the gear information is changed from a parking gear state to a parking gear state;
and the second control module is used for controlling the electric hydraulic pump of the vehicle to work at a second preset rotating speed under the condition that the first duration of the work of the electric hydraulic pump at the first preset rotating speed in the parking gear state is detected and is greater than or equal to the first preset duration, and the second preset rotating speed is less than the first preset rotating speed.
In order to solve the technical problem, the embodiment of the application further discloses a vehicle, and the vehicle comprises the control device of the hydraulic power-assisted braking system.
In the embodiment of the application, under the condition that a brake pedal signal and a starting signal of a vehicle are obtained, gear information of the vehicle is obtained; under the condition that the gear information is changed from a parking gear state to a parking gear state, controlling an electric hydraulic pump of the vehicle to work at a first preset rotating speed; in the application, under the condition that a first duration time that the electric hydraulic pump works at a first preset rotating speed in a parking gear state is detected to be greater than or equal to a first preset time, the electric hydraulic pump of a vehicle is controlled to work at a second preset rotating speed which is less than the first preset rotating speed, the vehicle is started from a flameout state under the condition that a brake pedal signal and a starting signal of the vehicle are obtained and gear information is changed from the parking gear state to the parking gear state, at the moment, the electric hydraulic pump for braking can be controlled to work at a higher first preset rotating speed, if the first duration time that the electric hydraulic pump works at the first preset rotating speed in the parking gear state in the vehicle is greater than or equal to the first preset time, the vehicle is not moved in a longer time period and still stays in the parking state, and the possibility of braking by the electric hydraulic pump is lower at the moment, therefore, the electric hydraulic pump for braking can be controlled to work at a lower second preset rotating speed, so that the energy consumption of the electric hydraulic pump is reduced, the cruising performance of the vehicle is improved, the noise generated by the electric hydraulic pump is reduced, and the use experience of a user in the vehicle is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a hydraulic power-assisted brake system of a vehicle according to an embodiment of the present disclosure;
FIG. 2 is a flowchart illustrating steps of a method for controlling a hydraulic assist brake system according to an embodiment of the present disclosure;
FIG. 3 is a flowchart illustrating steps of a method for controlling a hydraulic assist brake system according to an embodiment of the present disclosure;
fig. 4 is a block diagram of a control device of a hydraulic power-assisted brake system according to an embodiment of the present application.
Detailed Description
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, but not all, embodiments of the present 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.
The following describes in detail a control method of a hydraulic power-assisted brake system according to an embodiment of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a hydraulic power-assisted braking system of a vehicle according to an embodiment of the present invention, and as shown in fig. 1, the hydraulic power-assisted braking system includes a battery 10, a motor controller 20, a motor 30, an electric hydraulic pump 40, a hydraulic booster 50, and a reservoir 60.
The battery 10 supplies power to the motor controller 20, the motor controller 20 is in communication connection with the motor 30, the motor 30 is in mechanical connection with the electric hydraulic pump 40, the motor controller 20 can be in communication with a vehicle to acquire various state parameters of the vehicle, so that the motor 30 is controlled to enable the electric hydraulic pump 40 to work according to a certain preset rotating speed when the vehicle is in different states, and the electric hydraulic pump 40 can provide hydraulic pressure for the hydraulic booster 50 through the liquid storage tank 60 under the condition that the electric hydraulic pump 40 works according to the preset rotating speed, so that the hydraulic braking process of the vehicle is realized.
Fig. 2 is a flowchart illustrating steps of a method for controlling a hydraulic power-assisted brake system according to an embodiment of the present disclosure, where as shown in fig. 2, the method may include:
step 101, acquiring gear information of a vehicle under the condition that a brake pedal signal and a starting signal of the vehicle are acquired.
In this step, the motor controller of the vehicle may acquire the gear information of the vehicle in the case where the brake pedal signal and the power-on start signal of the vehicle are acquired.
Specifically, referring to fig. 1, the motor controller 20 of the vehicle may acquire a brake pedal signal and gear information of the vehicle through a high data line (CAN _ L) and a low data line (CAN _ H) in the vehicle, and acquire a start-up signal of the vehicle through an ignition enable line in the vehicle.
In the embodiment of the application, if a brake pedal signal and a start signal of a vehicle are obtained, it can be said that the brake pedal of the vehicle is pressed down at the moment, and a key of the vehicle is turned to a start position, at the moment, information related to the start of the vehicle can be displayed in an instrument panel of the vehicle, it is said that the vehicle is in a start state, and in order to determine whether the vehicle may need hydraulic braking at the moment, gear information of the vehicle can be further obtained.
And 102, controlling an electric hydraulic pump of the vehicle to work at a first preset rotating speed under the condition that the gear information is changed from a parking gear state to a parking gear state.
In this step, when the vehicle is in the starting state and it is detected that the gear information of the vehicle is changed from the parking position state to the parking position state, it indicates that the electric hydraulic pump of the vehicle needs to be in the working state at this time, so that when the electric hydraulic pump is needed to realize hydraulic braking, the electric hydraulic pump can quickly provide hydraulic pressure, thereby realizing hydraulic braking of the vehicle.
In the embodiment of the application, the power-on state of the vehicle can also be obtained through the startup signal, and in the power-on state of the entire vehicle, if it is detected that the gear information of the vehicle is changed from the parking gear state to the parking gear state, it can be stated that the electric hydraulic pump of the vehicle needs to be in a working state at the moment, so that the electric hydraulic pump needs to be in a working state when hydraulic braking is realized.
Specifically, be in the starting condition at the vehicle, and detect the gear information of vehicle and change to the parking position from the parking position state when, can control the electronic hydraulic pump of vehicle is with higher first preset rotational speed work for when needing electronic hydraulic pump to realize hydraulic braking, electronic hydraulic pump can be quick provide great hydraulic pressure, thereby quick realization vehicle's hydraulic braking.
In the embodiment of the present application, the first preset rotation speed may be a larger rotation speed value preset, for example, 1200 rpm.
103, controlling the electric hydraulic pump of the vehicle to work at a second preset rotating speed under the condition that a first duration of the electric hydraulic pump working at the first preset rotating speed in the parking gear state is detected to be greater than or equal to a first preset duration, wherein the second preset rotating speed is less than the first preset rotating speed.
In this step, a first duration of the electric hydraulic pump operating at the first preset rotational speed in the parking position state may be continuously monitored while the electric hydraulic pump is operating at the first preset rotational speed, and the electric hydraulic pump of the vehicle may be controlled to operate at a second preset rotational speed that is less than the first preset rotational speed when the first duration is greater than or equal to the first preset duration.
Specifically, if the first duration of the operation of the electric hydraulic pump at the first preset rotation speed in the parking gear state is longer than or equal to the first preset duration, it may be stated that the vehicle does not move within a longer period of time after being started, and is still in the parking state, which indicates that the user does not have a driving requirement, and at this time, the possibility of braking by using the electric hydraulic pump is low, and therefore, the electric hydraulic pump for braking may be controlled to operate at a lower second preset rotation speed.
In the embodiment of the present application, the second preset rotation speed may be a preset rotation speed value smaller than the first preset rotation speed, for example, when the first preset rotation speed is 1200 rpm, the second preset rotation speed may be set to 600 rpm.
In the embodiment of the present application, the first preset time period may be a fixed time value set in advance, for example, 5 seconds, 10 seconds, and the like.
In summary, the control method of the hydraulic power-assisted brake system provided in the embodiment of the present application includes: under the condition of obtaining a brake pedal signal and a starting signal of a vehicle, gear information of the vehicle is obtained; under the condition that the gear information is changed from a parking gear state to a parking gear state, controlling an electric hydraulic pump of the vehicle to work at a first preset rotating speed; in the application, under the condition that a first duration time that the electric hydraulic pump works at a first preset rotating speed in a parking gear state is detected to be greater than or equal to a first preset time, the electric hydraulic pump of a vehicle is controlled to work at a second preset rotating speed which is less than the first preset rotating speed, the vehicle is started from a flameout state under the condition that a brake pedal signal and a starting signal of the vehicle are obtained and gear information is changed from the parking gear state to the parking gear state, at the moment, the electric hydraulic pump for braking can be controlled to work at a higher first preset rotating speed, if the first duration time that the electric hydraulic pump works at the first preset rotating speed in the parking gear state in the vehicle is greater than or equal to the first preset time, the vehicle is not moved in a longer time period and still stays in the parking state, and the possibility of braking by the electric hydraulic pump is lower at the moment, therefore, the electric hydraulic pump for braking can be controlled to work at a lower second preset rotating speed, so that the energy consumption of the electric hydraulic pump is reduced, the cruising performance of the electric vehicle is improved, the noise generated by the electric hydraulic pump is reduced, and the use experience of a user in the vehicle is improved.
Fig. 3 is a flowchart illustrating steps of another method for controlling a hydraulic power-assisted brake system according to an embodiment of the present disclosure, where as shown in fig. 3, the method may include:
step 201, under the condition that a brake pedal signal and a starting signal of a vehicle are obtained, gear information of the vehicle is obtained.
The implementation of this step is similar to the implementation of step 101 described above, and is not described here again.
And 202, controlling an electric hydraulic pump of the vehicle to work at a first preset rotating speed under the condition that the gear information is changed from a parking gear state to a parking gear state.
The implementation of this step is similar to the implementation of step 102, and is not described here again.
And 203, controlling the electric hydraulic pump of the vehicle to work at a second preset rotating speed under the condition that a first duration of the electric hydraulic pump working at the first preset rotating speed in the parking gear state is detected to be greater than or equal to a first preset duration.
The implementation of this step is similar to the implementation process of step 103, and is not described here again.
And 204, detecting a second duration of the electric hydraulic pump working at the second preset rotating speed in the parking gear state.
In this step, a second duration in which the electric hydraulic pump is operated at a second preset rotation speed in the parking position state may be continuously detected while the electric hydraulic pump is operated at the second preset rotation speed.
And step 205, in the range of the first duration or the second duration, if the gear information is detected to be changed from the parking gear state to the forward gear state, controlling an electric hydraulic pump of the vehicle to work at the second preset rotating speed.
In the above-mentioned processes of steps 202 to 204, that is, in the range of the first duration or the second duration, if it is detected that the gear information is changed from the parking position state to the forward position state, it indicates that the vehicle is changed from the parking position state to the forward position state at a certain vehicle speed, and at this time, the electric hydraulic pump of the vehicle may be controlled to continue to operate at the second preset rotation speed.
Specifically, although the second preset rotating speed is less than the first preset rotating speed, the second preset rotating speed is greater than a third preset rotating speed of the electric hydraulic pump under the condition that the second duration is greater than or equal to the second preset duration, so that the electric hydraulic pump at the second preset rotating speed in the forward gear state can still provide enough hydraulic pressure to realize hydraulic braking of the vehicle without adjusting the rotating speed of the electric hydraulic pump.
And step 206, when the speed of the vehicle is less than or equal to a first preset speed value, controlling the electric hydraulic pump of the vehicle to continuously work at the second preset rotating speed.
The method includes the steps that in the process that the electric hydraulic pump of the vehicle works at the second preset rotating speed in the forward gear state, the speed of the vehicle can be continuously detected, and if the speed of the vehicle is smaller than or equal to the first preset speed value, the electric hydraulic pump of the vehicle can be controlled to continuously work at the second preset rotating speed.
Specifically, when the vehicle speed of the vehicle is less than or equal to the first preset speed value, the vehicle speed is relatively low, the braking distance of the vehicle is small, the braking strength is low, and the flow rate of the electric hydraulic pump can be correspondingly reduced, that is, the electric hydraulic pump can realize the hydraulic braking of the vehicle as long as the electric hydraulic pump generates relatively low hydraulic pressure, and therefore, the electric hydraulic pump of the vehicle can be controlled to continuously work at the second preset rotation speed.
Referring to fig. 1, the motor controller 20 of the vehicle may acquire vehicle speed information of the vehicle through a high data line (CAN _ L) and a low data line (CAN _ H) in the vehicle.
In this embodiment of the application, the first preset speed value may be a preset fixed speed value, for example: 30 km/h.
And step 207, controlling the electric hydraulic pump of the vehicle to work at a fourth preset rotating speed under the condition that the vehicle speed is greater than the first preset speed value and the angle change value of the accelerator pedal of the vehicle is greater than the preset angle change value.
In the process that the electric hydraulic pump of the vehicle works at the second preset rotating speed in the forward gear state, if the speed of the vehicle is greater than a first preset speed value, an angle change value of an accelerator pedal of the vehicle can be further detected.
Specifically, when the vehicle speed of the vehicle is greater than a first preset speed value, the working condition of the vehicle is complex, and therefore the electric hydraulic pump is required to provide a large flow rate and generate a large hydraulic pressure for emergency braking, and therefore the electric hydraulic pump of the vehicle can be controlled to operate at a rotating speed greater than a second preset rotating speed.
Further, a specific value of the operating rotational speed of the electric hydraulic pump may be determined by detecting an angle variation value of an accelerator pedal of the vehicle, and if the angle variation value of the accelerator pedal of the vehicle is greater than a preset angle variation value, it indicates that the accelerator pedal of the vehicle is pressed down and the vehicle is in an acceleration state at this time.
The fourth preset rotation speed is greater than the second preset rotation speed and less than the first preset rotation speed, for example, if the first preset rotation speed is 1200 rpm and the second preset rotation speed is 600 rpm, the fourth preset rotation speed may be set to 800 rpm.
In this embodiment of the present application, the preset angle variation value may be a preset fixed angle value, for example: 2 degrees.
Referring to fig. 1, the motor controller 20 of the vehicle may acquire an accelerator pedal of the vehicle through a high data line (CAN _ L) and a low data line (CAN _ H) in the vehicle.
And 208, controlling the electric hydraulic pump of the vehicle to work at a fifth preset rotating speed under the condition that the vehicle speed is greater than the first preset speed value and the angle change value of the accelerator pedal is less than or equal to the preset angle change value.
In this step, when the speed of the vehicle is greater than the first preset speed value, the operating condition of the vehicle is complex, and thus the electric hydraulic pump is required to provide a larger flow rate and generate a larger hydraulic pressure for emergency braking, so that the electric hydraulic pump of the vehicle can be controlled to operate at a rotation speed greater than the second preset rotation speed.
Furthermore, a specific value of the working rotating speed of the electric hydraulic pump can be determined by detecting an angle change value of an accelerator pedal of the vehicle, and if the angle change value of the accelerator pedal of the vehicle is smaller than or equal to a preset angle change value, it indicates that the accelerator pedal of the vehicle is not stepped on, the vehicle is in a non-acceleration state at the moment, and the possibility of braking the vehicle is high at the moment.
The fifth preset rotation speed is greater than the fourth preset rotation speed and less than the first preset rotation speed, for example, if the first preset rotation speed is 1200 rpm and the fourth preset rotation speed is 800 rpm, the fifth preset rotation speed may be set to 1100 rpm.
And 209, in the range of the first duration or the second duration, if the gear information is detected to be changed from the parking gear state to the reverse gear state, controlling an electric hydraulic pump of the vehicle to work at a fourth preset rotating speed.
In the above-mentioned processes of steps 202 to 204, that is, in the range of the first duration or the second duration, if it is detected that the shift information is changed from the parking position state to the reverse position state, it indicates that the vehicle is changed from the parking position state to the reverse position state where the vehicle is backed up at a certain vehicle speed, and at this time, the electric hydraulic pump of the vehicle may be controlled to operate at a fourth preset rotation speed greater than the second preset rotation speed.
And step 210, controlling the electric hydraulic pump of the vehicle to work at a third preset rotating speed under the condition that the second duration is greater than or equal to a second preset duration.
After step 204, if it is detected that the second duration of the operation of the electric hydraulic pump at the second preset rotation speed in the parking position state is greater than or equal to a second preset duration, the electric hydraulic pump of the vehicle may be controlled to operate at a third preset rotation speed, where the third preset rotation speed is less than the second preset rotation speed.
Specifically, if the second duration of the operation of the electric hydraulic pump at the second preset rotation speed in the parking gear state is greater than or equal to the second preset duration, it may be indicated that the electric hydraulic pump operates at the second preset rotation speed for the second preset duration after the vehicle is started, and does not move within the time period of the second preset duration, and is still in the parking state, which indicates that the user does not have a driving requirement, and at this time, the possibility of braking by using the electric hydraulic pump is lower, therefore, the electric hydraulic pump for braking may be controlled to operate at the third preset rotation speed, so as to reduce the energy consumption of the electric hydraulic pump, improve the cruising performance of the electric vehicle, reduce the noise generated by the electric hydraulic pump, and improve the user experience of the vehicle.
In this embodiment, the third preset rotation speed may be a preset rotation speed value smaller than the second preset rotation speed, for example, when the first preset rotation speed is 1200 rpm and the second preset rotation speed is 600 rpm, the third preset rotation speed may be set to 0 rpm.
In this embodiment of the application, the second preset duration may be a preset fixed time value, and the second preset duration may be equal to the first preset duration or may be unequal to the first preset duration, for example, the first preset duration and the second preset duration may be both set to be 5 seconds.
In this step, the electric hydraulic pump of the vehicle is operated at the third preset rotation speed in the parking range state, and during this process, the shift position information of the vehicle may be continuously monitored, and step 211 may be executed when the shift position information is changed from the parking range state to the forward range state, and step 213 may be executed when the shift position information is changed from the parking range state to the reverse range state.
And step 211, if it is detected that the gear information is changed from the parking gear state to the forward gear state, controlling an electric hydraulic pump of the vehicle to work at the first preset rotating speed.
In this step, during the process that the second duration is greater than or equal to the second preset duration, the electric hydraulic pump of the vehicle is controlled to operate at the third preset rotation speed, the gear information of the vehicle may be continuously detected, and if it is detected that the gear information is changed from the parking gear state to the forward gear state, the electric hydraulic pump of the vehicle may be controlled to operate at the higher first preset rotation speed.
And 212, controlling the electric hydraulic pump of the vehicle to work at the second preset rotating speed under the condition that the third duration of the electric hydraulic pump of the vehicle working at the first preset rotating speed in the forward gear state is greater than or equal to the third preset duration.
In this step, a third duration for which the electric hydraulic pump operates at the first preset rotational speed in the forward range state is continuously detected, and if the third duration is greater than or equal to a third preset duration, the electric hydraulic pump of the vehicle may be controlled to operate at a second lower preset rotational speed.
Specifically, if the third duration of the operation of the electric hydraulic pump at the first preset rotation speed in the forward gear state is longer than or equal to the third preset duration, it can be stated that the emergency braking does not occur in a longer time period in the forward gear state of the vehicle, and therefore, the possibility of performing the emergency braking by using the electric hydraulic pump is lower, so that the electric hydraulic pump for braking can be controlled to operate at the lower second preset rotation speed.
In this embodiment of the application, the third preset time period may be a preset fixed time value, and the third preset time period may be equal to the first preset time period and the second preset time period, or may be unequal to the first preset time period and the second preset time period, for example, the first preset time period and the second preset time period may both be 5 seconds, and the third preset time period is 3 seconds.
And step 213, if the gear information is detected to be changed from the parking gear state to the reverse gear state, controlling an electric hydraulic pump of the vehicle to work at the first preset rotating speed.
In this step, when the second duration is greater than or equal to a second preset duration, the gear information of the vehicle may be continuously detected while the electric hydraulic pump of the vehicle is controlled to operate at a third preset rotational speed, and if it is detected that the gear information is changed from the parking gear state to the reverse gear state, the electric hydraulic pump of the vehicle may be controlled to operate at a higher first preset rotational speed.
And 214, controlling the electric hydraulic pump of the vehicle to work at a fourth preset rotating speed under the condition that the fourth duration of the electric hydraulic pump of the vehicle working at the first preset rotating speed in the reverse gear state is greater than or equal to a fourth preset duration.
In this step, a fourth duration for which the electric hydraulic pump operates at the first preset rotational speed in the reverse gear state is continuously detected, and if the fourth duration is greater than or equal to the fourth preset duration, the electric hydraulic pump of the vehicle may be controlled to operate at a fourth lower preset rotational speed.
Specifically, if the fourth duration of the operation of the electric hydraulic pump at the first preset rotation speed in the reverse gear state is longer than or equal to the fourth preset duration, it can be stated that the emergency braking does not occur in a longer time period in the process of reversing the vehicle, and therefore, the possibility of performing the emergency braking by using the electric hydraulic pump is lower, so that the electric hydraulic pump for braking can be controlled to operate at the lower fourth preset rotation speed.
In this embodiment of the application, the fourth preset duration may be a preset fixed time value, and the fourth preset duration may be equal to the first preset duration, the second preset duration, and the third preset duration, or may be unequal to the first preset duration, the second preset duration, and the third preset duration, for example, the first preset duration and the second preset duration may be set to be 5 seconds, and the third preset duration and the fourth preset duration may be set to be 3 seconds.
It should be noted that, during the operation of the electric hydraulic pump of the vehicle at the fourth preset rotation speed in the reverse gear state, the gear information of the vehicle may be continuously monitored, so that when it is detected that the vehicle changes from the reverse gear state to the forward gear state, step 206 may be executed to monitor the vehicle speed of the vehicle and the angle change value of the accelerator pedal, and determine the rotation speed of the electric hydraulic pump according to the vehicle speed of the vehicle and the angle change value of the accelerator pedal.
And 215, controlling the electric hydraulic pump of the vehicle to continuously work at the second preset rotating speed under the condition that the vehicle speed of the vehicle is reduced to zero and the gear information of the vehicle is changed from the forward gear state to the parking gear state.
After step 212, if it is detected that the vehicle speed of the vehicle is reduced to zero and the gear information of the vehicle is changed from the forward gear state to the parking gear state, the electric hydraulic pump of the vehicle may be controlled to continue to operate at a second preset rotation speed.
And 216, turning off the electric hydraulic pump of the vehicle under the condition that the fifth duration time for which the electric hydraulic pump continues to work at the second preset rotating speed is greater than or equal to a fifth preset time.
In this step, if it is detected that a fifth duration of the electric hydraulic pump of the vehicle continuously operating at the second preset rotation speed is greater than or equal to a fifth preset duration, it may be determined that the vehicle is changed from a forward state to a parking state, and the parking state is maintained for a certain time, it may be considered that the driver ends the driving behavior at this time, that is, the electric hydraulic pump is no longer required to provide hydraulic pressure to implement hydraulic power-assisted braking, and thus the electric hydraulic pump may be turned off.
In this embodiment of the application, the fifth preset time period may be a preset fixed time value, and the fifth preset time period may be equal to the first preset time period, the second preset time period, the third preset time period, and the fourth preset time period, or may be unequal to the first preset time period, the second preset time period, the third preset time period, and the fourth preset time period, for example, the first preset time period and the second preset time period may be set to be 5 seconds, and the third preset time period, the fourth preset time period, and the fifth preset time period are set to be 3 seconds.
And 217, controlling the electric hydraulic pump of the vehicle to work at the second preset rotating speed under the condition that the vehicle speed of the vehicle is reduced to zero and the gear information of the vehicle is changed from the reverse gear state to the parking gear state.
After step 214, if it is detected that the vehicle speed of the vehicle is reduced to zero and the gear information of the vehicle is changed from the reverse gear state to the parking gear state, the electric hydraulic pump of the vehicle may be controlled to operate at a second preset rotation speed that is smaller.
And step 218, turning off the electric hydraulic pump of the vehicle under the condition that the sixth duration time for which the electric hydraulic pump continues to work at the second preset rotating speed is greater than or equal to the sixth preset time.
In this step, if it is detected that a sixth duration of time that the electric hydraulic pump of the vehicle continues to operate at the second preset rotation speed is greater than or equal to a sixth preset duration of time, it may be interpreted that the vehicle is changed from the reverse state to the parking state, and the parking state is maintained for a certain time, it may be considered that the driver ends the driving behavior at this time, that is, the electric hydraulic pump is no longer required to provide hydraulic pressure to implement hydraulic power-assisted braking, and thus the electric hydraulic pump may be turned off,
in this embodiment of the application, the sixth preset time period may be a preset fixed time value, and the sixth preset time period may be equal to the first preset time period, the second preset time period, the third preset time period, the fourth preset time period and the fifth preset time period, or may be unequal to the first preset time period, the second preset time period, the third preset time period, the fourth preset time period and the fifth preset time period, for example, the first preset time period and the second preset time period may be set to be 5 seconds, and the third preset time period, the fourth preset time period, the fifth preset time period and the sixth preset time period may be 3 seconds.
In the embodiment of the present application, in the control process of the hydraulic power-assisted brake system, if the vehicle speed or the start-up signal of the vehicle fails to be obtained, the following steps are executed:
(1) and under the condition that the vehicle speed or the starting signal of the vehicle fails to be acquired, controlling an electric hydraulic pump of the vehicle to work at the fifth preset rotating speed.
In this step, in the control process of the hydraulic power-assisted braking system, if the speed of the vehicle is obtained or the start-up signal fails to be obtained, the electric hydraulic pump of the vehicle is controlled to operate at a fifth preset rotating speed, so that the electric hydraulic pump can generate a large hydraulic pressure, and emergency braking can be rapidly realized.
In the embodiment of the application, in the control process of the hydraulic power-assisted brake system, if the gear information or the accelerator pedal information fails to be acquired, the following steps are executed:
(1) and under the condition that the gear information or the accelerator pedal information is failed to be acquired, if the speed of the vehicle is less than or equal to a second preset speed value, controlling an electric hydraulic pump of the vehicle to work at the second preset rotating speed.
In this step, in the control of the hydraulic power-assisted brake system, if the gear information or the accelerator pedal information is not obtained, the vehicle speed of the vehicle may be detected, and the rotation speed of the electric hydraulic pump may be determined according to the vehicle speed.
Specifically, if the gear information or the accelerator pedal information is failed to be acquired, and the vehicle speed of the vehicle is less than or equal to the second preset speed value, at this time, the vehicle speed is relatively small, the braking distance of the vehicle is small, the braking strength is low, and the flow rate of the electric hydraulic pump can be correspondingly reduced, that is, the electric hydraulic pump can realize the hydraulic braking of the vehicle as long as the electric hydraulic pump generates relatively small hydraulic pressure, so that the electric hydraulic pump of the vehicle can be controlled to work at the relatively small second preset rotating speed.
In this embodiment of the application, the second preset speed value may be a preset fixed speed value, and the second preset speed value may be equal to the first preset speed value, or may be unequal to the first preset speed value, for example: both the first preset speed value and the second preset speed value may be set to 30 km/h.
(2) And under the condition that the gear information or the accelerator pedal information is failed to be acquired, if the speed of the vehicle is greater than the second preset speed value, controlling an electric hydraulic pump of the vehicle to work at a fifth preset rotating speed.
In this step, if the gear information or the accelerator pedal information is failed to be acquired, and the vehicle speed of the vehicle is greater than the second preset speed value, the working condition of the vehicle is complicated, so that the electric hydraulic pump is required to provide a larger flow rate and generate a larger hydraulic pressure for emergency braking, and therefore, the electric hydraulic pump of the vehicle can be controlled to work at a second preset rotating speed which is smaller.
In summary, the control method of the hydraulic power-assisted brake system provided in the embodiment of the present application includes: under the condition of obtaining a brake pedal signal and a starting signal of a vehicle, gear information of the vehicle is obtained; under the condition that the gear information is changed from a parking gear state to a parking gear state, controlling an electric hydraulic pump of the vehicle to work at a first preset rotating speed; in the application, under the condition that a first duration time that the electric hydraulic pump works at a first preset rotating speed in a parking gear state is detected to be greater than or equal to a first preset time, the electric hydraulic pump of a vehicle is controlled to work at a second preset rotating speed which is less than the first preset rotating speed, the vehicle is started from a flameout state under the condition that a brake pedal signal and a starting signal of the vehicle are obtained and gear information is changed from the parking gear state to the parking gear state, at the moment, the electric hydraulic pump for braking can be controlled to work at a higher first preset rotating speed, if the first duration time that the electric hydraulic pump works at the first preset rotating speed in the parking gear state in the vehicle is greater than or equal to the first preset time, the vehicle is not moved in a longer time period and still stays in the parking state, and the possibility of braking by the electric hydraulic pump is lower at the moment, therefore, the electric hydraulic pump for braking can be controlled to work at a lower second preset rotating speed, so that the energy consumption of the electric hydraulic pump is reduced, the cruising performance of the electric vehicle is improved, the noise generated by the electric hydraulic pump is reduced, and the use experience of a user in the vehicle is improved.
In the control method of the hydraulic power-assisted brake system provided in the embodiment of the present application, the execution subject may be a control device of the hydraulic power-assisted brake system, or a control module in the control device of the hydraulic power-assisted brake system for executing the control method of the hydraulic power-assisted brake system. In the embodiments of the present application, a control device of a hydraulic power-assisted brake system according to the embodiments of the present application will be described by taking, as an example, a method for a control device of a hydraulic power-assisted brake system to execute a control of the hydraulic power-assisted brake system.
Fig. 4 is a block diagram of a control apparatus of a hydraulic power-assisted brake system according to an embodiment of the present application, and as shown in fig. 4, the apparatus 300 includes:
the acquiring module 301 is configured to acquire gear information of a vehicle when a brake pedal signal and a start-up signal of the vehicle are acquired;
the first control module 302 is used for controlling an electric hydraulic pump of the vehicle to work at a first preset rotating speed under the condition that the gear information is changed from a parking gear state to a parking gear state;
the second control module 303 is configured to control the electric hydraulic pump of the vehicle to operate at a second preset rotation speed when detecting that the electric hydraulic pump operates at the parking position for a first duration time that is greater than or equal to a first preset duration time, where the second preset rotation speed is less than the first preset rotation speed.
Optionally, the apparatus 300 further includes:
the detection module is used for detecting a second duration of the electric hydraulic pump working at the second preset rotating speed in the parking gear state;
and the third control module is used for controlling the electric hydraulic pump of the vehicle to work at a third preset rotating speed under the condition that the second duration is greater than or equal to a second preset duration, wherein the third preset rotating speed is less than the second preset rotating speed.
Optionally, the apparatus 300 further includes:
the fourth control module is used for controlling an electric hydraulic pump of the vehicle to work at the second preset rotating speed if the gear information is detected to be changed from the parking gear state to the forward gear state in the range of the first duration or the second duration;
the fifth control module is used for controlling the electric hydraulic pump of the vehicle to continuously work at the second preset rotating speed when the vehicle speed of the vehicle is less than or equal to the first preset speed value;
the sixth control module is used for controlling an electric hydraulic pump of the vehicle to work at a fourth preset rotating speed under the condition that the vehicle speed is greater than the first preset speed value and the angle change value of an accelerator pedal of the vehicle is greater than the preset angle change value, wherein the fourth preset rotating speed is greater than the second preset rotating speed and is less than the first preset rotating speed;
and the seventh control module is used for controlling the electric hydraulic pump of the vehicle to work at a fifth preset rotating speed under the condition that the vehicle speed is greater than the first preset speed value and the angle change value of the accelerator pedal is less than or equal to the preset angle change value, wherein the fifth preset rotating speed is greater than the fourth preset rotating speed and is less than the first preset rotating speed.
Optionally, the apparatus 300 further includes:
and the eighth control module is used for controlling the electric hydraulic pump of the vehicle to work at a fourth preset rotating speed if the gear information is detected to be changed from the parking gear state to the reverse gear state in the range of the first duration time or the second duration time.
Optionally, the apparatus 300 further includes:
the ninth control module is used for controlling an electric hydraulic pump of the vehicle to work at the first preset rotating speed if the gear information is detected to be changed from the parking gear state to the forward gear state;
and the tenth control module is used for controlling the electric hydraulic pump of the vehicle to work at the second preset rotating speed under the condition that the third duration of the electric hydraulic pump of the vehicle working at the first preset rotating speed in the forward gear state is greater than or equal to the third preset duration.
Optionally, the apparatus 300 further includes:
the eleventh control module is used for controlling an electric hydraulic pump of the vehicle to work at the first preset rotating speed if the gear information is detected to be changed from the parking gear state to the reverse gear state;
and the twelfth control module is used for controlling the electric hydraulic pump of the vehicle to work at a fourth preset rotating speed under the condition that the fourth duration of the electric hydraulic pump of the vehicle working at the first preset rotating speed in the reverse gear state is greater than or equal to a fourth preset duration.
Optionally, the apparatus 300 further includes:
the thirteenth control module is used for controlling the electric hydraulic pump of the vehicle to continuously work at the second preset rotating speed under the condition that the speed of the vehicle is reduced to zero and the gear information of the vehicle is changed from the forward gear state to the parking gear state;
and the closing module is used for closing the electric hydraulic pump of the vehicle under the condition that the fifth duration time of the electric hydraulic pump continuously working at the second preset rotating speed is longer than or equal to the fifth preset time.
Optionally, the apparatus 300 further includes:
and the fourteenth control module is used for controlling the electric hydraulic pump of the vehicle to work at the fifth preset rotating speed under the condition that the vehicle speed of the vehicle or the starting signal fails to be acquired.
Optionally, the apparatus 300 further includes:
the fifteenth control module is used for controlling an electric hydraulic pump of the vehicle to work at a second preset rotating speed if the speed of the vehicle is less than or equal to the second preset speed value under the condition that the gear information or the accelerator pedal information is failed to be acquired;
and the sixteenth control module is used for controlling the electric hydraulic pump of the vehicle to work at a fifth preset rotating speed if the speed of the vehicle is greater than the second preset speed value under the condition that the gear information or the accelerator pedal information is failed to be acquired.
In summary, the control device of a hydraulic power-assisted brake system provided in the embodiments of the present application includes: under the condition of obtaining a brake pedal signal and a starting signal of a vehicle, gear information of the vehicle is obtained; under the condition that the gear information is changed from a parking gear state to a parking gear state, controlling an electric hydraulic pump of the vehicle to work at a first preset rotating speed; in the application, under the condition that a first duration time that the electric hydraulic pump works at a first preset rotating speed in a parking gear state is detected to be greater than or equal to a first preset time, the electric hydraulic pump of a vehicle is controlled to work at a second preset rotating speed which is less than the first preset rotating speed, the vehicle is started from a flameout state under the condition that a brake pedal signal and a starting signal of the vehicle are obtained and gear information is changed from the parking gear state to the parking gear state, at the moment, the electric hydraulic pump for braking can be controlled to work at a higher first preset rotating speed, if the first duration time that the electric hydraulic pump works at the first preset rotating speed in the parking gear state in the vehicle is greater than or equal to the first preset time, the vehicle is not moved in a longer time period and still stays in the parking state, and the possibility of braking by the electric hydraulic pump is lower at the moment, therefore, the electric hydraulic pump for braking can be controlled to work at a lower second preset rotating speed, so that the energy consumption of the electric hydraulic pump is reduced, the cruising performance of the electric vehicle is improved, the noise generated by the electric hydraulic pump is reduced, and the use experience of a user in the vehicle is improved.
The embodiment of the application also provides a vehicle which comprises the control device of the hydraulic power-assisted braking system, so that the control method of the hydraulic power-assisted braking system can be realized.
It should also be noted that, in this document, 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, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present application. Moreover, relational terms such as "first" and "second" are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions or should not be construed as indicating or implying relative importance. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or terminal equipment comprising the element.
The technical solutions provided by the present application are described in detail above, and the principles and embodiments of the present application are described herein by using specific examples, which are only used to help understanding the present application, and the content of the present description should not be construed as limiting the present application. While various modifications of the illustrative embodiments and applications will be apparent to those skilled in the art based upon this disclosure, it is not necessary or necessary to exhaustively enumerate all embodiments, and all obvious variations and modifications can be resorted to, falling within the scope of the disclosure.

Claims (10)

1. A method of controlling a hydraulic power assisted brake system, the method comprising:
under the condition of acquiring a brake pedal signal and a starting signal of a vehicle, acquiring gear information of the vehicle;
under the condition that the gear information is changed from a parking gear state to a parking gear state, controlling an electric hydraulic pump of the vehicle to work at a first preset rotating speed;
and controlling the electric hydraulic pump of the vehicle to work at a second preset rotating speed under the condition that a first duration time for which the electric hydraulic pump works at the first preset rotating speed in the parking gear state is detected to be longer than or equal to a first preset time, wherein the second preset rotating speed is less than the first preset rotating speed.
2. The method of claim 1, wherein after the step of controlling an electrically-driven hydraulic pump of the vehicle to operate at a second preset rotational speed, the method further comprises:
detecting a second duration of time that the electric hydraulic pump works at the second preset rotating speed in the parking gear state;
and under the condition that the second duration is greater than or equal to a second preset duration, controlling the electric hydraulic pump of the vehicle to work at a third preset rotating speed, wherein the third preset rotating speed is less than the second preset rotating speed.
3. The method of claim 2, further comprising:
within the range of the first duration or the second duration, if the gear information is detected to be changed from the parking gear state to the forward gear state, controlling an electric hydraulic pump of the vehicle to work at the second preset rotating speed;
when the speed of the vehicle is less than or equal to a first preset speed value, controlling an electric hydraulic pump of the vehicle to continuously work at a second preset rotating speed;
controlling an electric hydraulic pump of the vehicle to work at a fourth preset rotating speed under the condition that the vehicle speed is greater than the first preset speed value and the angle change value of an accelerator pedal of the vehicle is greater than the preset angle change value, wherein the fourth preset rotating speed is greater than the second preset rotating speed and is less than the first preset rotating speed;
and under the condition that the vehicle speed is greater than the first preset speed value and the angle change value of the accelerator pedal is less than or equal to the preset angle change value, controlling the electric hydraulic pump of the vehicle to work at a fifth preset rotating speed, wherein the fifth preset rotating speed is greater than the fourth preset rotating speed and is less than the first preset rotating speed.
4. The method of claim 2, further comprising:
and in the range of the first duration or the second duration, if the gear information is detected to be changed from the parking gear state to the reverse gear state, controlling an electric hydraulic pump of the vehicle to work at a fourth preset rotating speed.
5. The method of claim 2, wherein after the step of controlling the electrically-driven hydraulic pump of the vehicle to operate at a third preset rotational speed, the method further comprises:
if the gear information is detected to be changed from the parking gear state to the forward gear state, controlling an electric hydraulic pump of the vehicle to work at the first preset rotating speed;
and under the condition that a third duration of the electric hydraulic pump of the vehicle working at the first preset rotating speed in the forward gear state is longer than or equal to a third preset duration, controlling the electric hydraulic pump of the vehicle to work at the second preset rotating speed.
6. The method of claim 2, wherein after the step of controlling the electrically-driven hydraulic pump of the vehicle to operate at a third preset rotational speed, the method further comprises:
if the gear information is detected to be changed from the parking gear state to the reverse gear state, controlling an electric hydraulic pump of the vehicle to work at the first preset rotating speed;
and under the condition that a fourth duration of the electric hydraulic pump of the vehicle working at the first preset rotating speed in the reverse gear state is longer than or equal to a fourth preset duration, controlling the electric hydraulic pump of the vehicle to work at the fourth preset rotating speed.
7. The method according to claim 3, characterized in that, after the step of controlling an electrically-driven hydraulic pump of the vehicle to operate at the second preset rotation speed if a change of the gear information from the parking position state to a forward position state is detected within the range of the first duration or the second duration, the method further comprises:
under the condition that the speed of the vehicle is reduced to zero and the gear information of the vehicle is changed from the forward gear state to the parking gear state, controlling an electric hydraulic pump of the vehicle to continuously work at the second preset rotating speed;
and under the condition that the fifth duration time for which the electric hydraulic pump of the vehicle continues to work at the second preset rotating speed is greater than or equal to a fifth preset time, closing the electric hydraulic pump.
8. The method of claim 1, further comprising:
under the condition that the gear information or the accelerator pedal information is failed to be acquired, if the speed of the vehicle is less than or equal to a second preset speed value, controlling an electric hydraulic pump of the vehicle to work at a second preset rotating speed;
and under the condition that the gear information or the accelerator pedal information is failed to be acquired, if the speed of the vehicle is greater than the second preset speed value, controlling an electric hydraulic pump of the vehicle to work at a fifth preset rotating speed.
9. A control apparatus for a hydraulic power assisted brake system, the apparatus comprising:
the system comprises an acquisition module, a starting module and a control module, wherein the acquisition module is used for acquiring gear information of a vehicle under the condition of acquiring a brake pedal signal and a starting signal of the vehicle;
the first control module is used for controlling an electric hydraulic pump of the vehicle to work at a first preset rotating speed under the condition that the gear information is changed from a parking gear state to a parking gear state;
and the second control module is used for controlling the electric hydraulic pump of the vehicle to work at a second preset rotating speed under the condition that the first duration of the work of the electric hydraulic pump at the first preset rotating speed in the parking gear state is detected and is greater than or equal to the first preset duration, and the second preset rotating speed is less than the first preset rotating speed.
10. A vehicle characterized by comprising the control device of the hydraulic power-assisted brake system according to claim 9.
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