CN114454855B - Brake caliper dragging control method, device, equipment and storage medium - Google Patents
Brake caliper dragging control method, device, equipment and storage medium Download PDFInfo
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- CN114454855B CN114454855B CN202210175811.XA CN202210175811A CN114454855B CN 114454855 B CN114454855 B CN 114454855B CN 202210175811 A CN202210175811 A CN 202210175811A CN 114454855 B CN114454855 B CN 114454855B
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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
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
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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
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/171—Detecting parameters used in the regulation; Measuring values used in the regulation
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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
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
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Abstract
The invention relates to the technical field of vehicle control, and discloses a method, a device, equipment and a storage medium for controlling brake caliper dragging, wherein the method comprises the following steps: acquiring a current pedal travel sensing signal of a target vehicle; determining whether an actuating signal exists in a target control unit or not according to the current pedal travel sensing signal; when an actuating signal exists in the target control unit, pressure is built on the target brake system according to a preset calibration rate; controlling dragging of the brake calipers according to the target pedal travel sensing signal and a preset pedal braking threshold value; according to the brake caliper dragging control method, the actuating signal exists in the target control unit, the hydraulic pressure of the brake system is controlled through the target pedal stroke sensing signal and the preset pedal brake threshold value, so that the dragging control of the brake caliper is realized, the dragging accuracy of the brake caliper can be effectively improved, and the pedal feel of the whole vehicle is guaranteed while the dragging torque of the brake caliper is reduced.
Description
Technical Field
The invention relates to the technical field of vehicle control, in particular to a brake caliper dragging control method, a brake caliper dragging control device, brake caliper dragging control equipment and a storage medium.
Background
Along with the popularization of modern automobile electronic products, the safety performance of an electronic parking system is high, so that the electronic parking system is widely applied to automobile manufacturers, the technology that the electronic parking system is used without opening a brake caliper is adopted, the maximum technical problem is how to reduce the dragging force of the brake caliper, the dragging force of the brake caliper is caused by incomplete separation of a friction plate and a brake disc, the dragging torque of the brake caliper is generally in a large value level due to the pedal feeling and the mechanical structure limitation of the whole automobile, the excessive dragging torque can not only cause the problems of brake shaking, abnormal sound and the like, and simultaneously can cause great influence on the oil consumption of the whole automobile.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a brake caliper dragging control method, a brake caliper dragging control device, brake caliper dragging equipment and a storage medium, and aims to solve the technical problems that the brake caliper dragging control accuracy is low, the brake caliper dragging torque cannot be reduced, and the pedal feeling of a whole vehicle cannot be guaranteed in the prior art.
In order to achieve the aim, the invention provides a control method for brake caliper dragging, which comprises the following steps:
acquiring a current pedal travel sensing signal of a target vehicle;
determining whether an actuating signal exists in a target control unit according to the current pedal travel sensing signal;
when an actuating signal exists in the target control unit, building pressure on a target brake system according to a preset calibration rate to obtain a target pedal stroke sensing signal;
and controlling the dragging of the brake caliper according to the target pedal travel sensing signal and a preset pedal braking threshold value.
Optionally, after determining whether the target control unit has an actuation signal according to the current pedal stroke sensing signal, the method further includes:
when the target control unit does not have an actuating signal, calculating the current pedal stepping rate according to the current pedal stroke sensing signal;
determining a driving intention of a user according to the current pedal stepping rate;
and when the driving intention is a braking intention, building pressure on a target braking system within target time according to a target set speed to obtain a target pedal travel sensing signal.
Optionally, the calculating a current pedal stepping rate according to the current pedal stroke sensing signal when the target control unit does not have an actuation signal includes:
when the target control unit does not have an actuating signal, obtaining a corresponding pedal stepping period and a corresponding pedal stroke variable quantity according to the current pedal stroke sensing signal;
and calculating the pedal stepping period and the pedal stroke variable quantity to obtain the current pedal stepping rate.
Optionally, the target set rate includes a first set rate and a second set rate, and the target time includes a first time and a second time;
when the target control unit has an actuating signal, the target brake system is pressurized according to a preset calibration rate to obtain a target pedal travel sensing signal, and the method comprises the following steps:
when the driving intention is a braking intention, carrying out pressure build-up on a target braking system in a first time according to a first set speed;
building pressure on the target brake system within a second time according to a second set speed;
and obtaining a target pedal stroke sensing signal through the pressurized target brake system.
Optionally, the controlling the brake caliper dragging according to the target pedal travel sensing signal and a preset pedal braking threshold includes:
obtaining the current pedal braking travel according to the target pedal travel sensing signal;
and when the current pedal braking stroke is greater than or equal to a preset pedal braking threshold value, performing hydraulic braking on the hydraulic pressure of the braking system according to a preset hydraulic pressure-stroke characteristic, and controlling the dragging of the brake caliper by controlling the hydraulic pressure of the braking system.
Optionally, after obtaining the current pedal braking stroke according to the target pedal stroke sensing signal, the method further includes:
when the current pedal braking travel is smaller than a preset pedal braking threshold value, acquiring the current pressure of a target braking system;
and reducing the current pressure of the target brake system according to a preset pressure relief strategy so as to reduce the dragging torque of the brake caliper.
Optionally, after controlling the brake caliper dragging according to the target pedal travel sensing signal and a preset pedal braking threshold, the method further includes:
acquiring the current dragging torque, vehicle deceleration and fuel consumption of dragging of the brake caliper;
when the current dragging torque is smaller than the historical dragging torque, the vehicle deceleration is smaller than the historical deceleration, and the fuel consumption is smaller than the historical fuel consumption, a control strategy for dragging the brake calipers is generated;
and controlling the dragging of the brake calipers of the target model through the control strategy.
In order to achieve the above object, the present invention also provides a brake caliper drag control device, including:
the acquisition module is used for acquiring a current pedal travel sensing signal of a target vehicle;
the determining module is used for determining whether an actuating signal exists in the target control unit according to the current pedal travel sensing signal;
the pressure building module is used for building pressure on a target brake system according to a preset calibration rate when an actuating signal exists in the target control unit to obtain a target pedal travel sensing signal;
and the control module is used for controlling the dragging of the brake calipers according to the target pedal travel sensing signal and a preset pedal braking threshold value.
Furthermore, to achieve the above object, the present invention also proposes a brake caliper dragging control apparatus including: the brake caliper dragging control method comprises the steps of storing a brake caliper dragging control program, storing a brake caliper dragging control program on a memory and running on a processor, and realizing the brake caliper dragging control method.
In addition, in order to achieve the above object, the present invention further provides a storage medium, wherein the storage medium stores a brake caliper dragging control program, and the brake caliper dragging control program is executed by a processor to realize the brake caliper dragging control method.
The invention provides a control method for dragging of brake calipers, which comprises the steps of obtaining a current pedal travel sensing signal of a target vehicle; determining whether an actuating signal exists in a target control unit or not according to the current pedal travel sensing signal; when an actuating signal exists in the target control unit, building pressure on a target brake system according to a preset calibration rate to obtain a target pedal stroke sensing signal; controlling dragging of the brake calipers according to the target pedal travel sensing signal and a preset pedal braking threshold value; according to the brake caliper dragging control method, the actuating signal exists in the target control unit, the hydraulic pressure of the brake system is controlled through the target pedal stroke sensing signal and the preset pedal brake threshold value, so that the dragging control of the brake caliper is realized, the accuracy of controlling the dragging of the brake caliper can be effectively improved, and the pedal feel of the whole vehicle is guaranteed while the dragging torque of the brake caliper is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a brake caliper dragging control device in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a first embodiment of a method for controlling brake caliper dragging in accordance with the present invention;
FIG. 3 is a schematic diagram of the brake caliper dragging torque according to an embodiment of the control method for brake caliper dragging of the present invention;
FIG. 4 is a schematic diagram illustrating a pedal feel of the whole vehicle according to an embodiment of the method for controlling dragging of the brake caliper;
FIG. 5 is a schematic diagram of fuel consumption according to an embodiment of the present invention;
FIG. 6 is a schematic power consumption diagram of an embodiment of a method for controlling brake caliper dragging according to the present invention;
FIG. 7 is a schematic flow chart illustrating a second embodiment of a method for controlling brake caliper dragging in accordance with the present invention;
FIG. 8 is a schematic flow chart illustrating a third embodiment of a method for controlling brake caliper dragging in accordance with the present invention;
FIG. 9 is a functional block diagram of the first embodiment of the brake caliper dragging control device of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a brake caliper dragging control device in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the brake caliper dragging control apparatus may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to implement connection communication among these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a Wireless interface (e.g., a Wireless-Fidelity (Wi-Fi) interface). The Memory 1005 may be a Random Access Memory (RAM) Memory, or may be a Non-Volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration shown in FIG. 1 does not constitute a limitation of the brake caliper dragging control device and may include more or fewer components than shown, or some components in combination, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a kind of storage medium, may include therein an operating system, a network communication module, a user interface module, and a brake caliper dragging control program.
In the brake caliper dragging control device shown in fig. 1, the network interface 1004 is mainly used for data communication with a network integration platform workstation; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the control device for brake caliper dragging according to the present invention may be provided in the control device for brake caliper dragging, which calls the control program for brake caliper dragging stored in the memory 1005 through the processor 1001 and executes the control method for brake caliper dragging provided by the embodiment of the present invention.
Based on the hardware structure, the embodiment of the control method for brake caliper dragging is provided.
Referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of a brake caliper dragging control method according to the present invention.
In a first embodiment, the control method of brake caliper dragging comprises the steps of:
and step S10, acquiring a current pedal stroke sensing signal of the target vehicle.
It should be noted that, the execution subject of the embodiment is a control device for dragging a brake caliper, and may also be other devices that can achieve the same or similar functions, such as an electronic booster control module or a vehicle dynamic control module.
It should be understood that the current pedal stroke sensing signal refers to a sensing signal when a user steps on a brake pedal, the current pedal stroke sensing signal is acquired by a pedal stroke sensor, the pedal stroke sensor transmits the current pedal stroke sensing signal to an electronic booster control module or a vehicle dynamic control module in real time after acquiring the current pedal stroke sensing signal, and a low-drag caliper is set through a disc gap before acquiring the current pedal stroke sensing signal of a target vehicle.
It is understood that when the actuator is an electronic booster control module, the electronic booster control module is selected based on parameters such as emergency brake hydraulic response time, piston area, caliper fluid flow, motor speed, and rack speed.
And step S20, determining whether an actuating signal exists in the target control unit according to the current pedal stroke sensing signal.
It can be understood that the target control unit includes an Advanced Driving Assistance control unit (ADAS) and a braking energy control unit (CRBS), and after the current pedal stroke sensing signal is obtained, the electronic booster control module may determine whether the ADAS unit and the CRBS unit are activated, specifically, determine whether the activation signals of the ADAS unit and the CRBS unit are received, and if the activation signals of the ADAS unit and the CRBS unit are received, it indicates that the ADAS unit and the CRBS unit are activated, otherwise, it indicates that the ADAS unit and the CRBS unit are not activated.
And S30, when the target control unit has an actuating signal, building pressure on a target brake system according to a preset calibration rate to obtain a target pedal travel sensing signal.
It should be understood that the target pedal stroke sensing signal refers to a sensing signal obtained after a target brake system is pressurized, the preset calibration rate refers to a rate calibrated during pressurization, the preset calibration rate may be β 0, specifically, the target brake system is pressurized to 2-3bar by the preset calibration rate, and then the pedal stroke sensor continues to collect the sensing signal obtained when the brake pedal is stepped, so as to obtain the target pedal stroke sensing signal.
And S40, controlling the dragging of the brake caliper according to the target pedal travel sensing signal and a preset pedal braking threshold value.
The brake caliper dragging control method includes the steps that a preset pedal brake threshold value refers to the minimum brake value for controlling dragging of the brake caliper, specifically, the current pedal brake stroke corresponding to a target pedal stroke sensing signal is compared with the preset pedal brake threshold value, the dragging mode of the brake caliper is determined according to the comparison result, and then the dragging of the brake caliper is controlled through the determined control mode, so that the dragging torque of the brake caliper is reduced, and meanwhile pedal feeling of a whole vehicle can be guaranteed.
Further, after step S40, the method further includes: acquiring the current dragging torque dragged by the brake calipers, the vehicle deceleration and the fuel consumption; when the current dragging torque is smaller than the historical dragging torque, the vehicle deceleration is smaller than the historical deceleration, and the fuel consumption is smaller than the historical fuel consumption, a control strategy for dragging the brake calipers is generated; and controlling the dragging of the brake calipers of the target model through the control strategy.
It should be understood that the present drag torque refers to a torque at which the brake caliper drags when friction is generated between the brake pads and the brake disc, the vehicle deceleration refers to a speed at which the vehicle decelerates during traveling, and the fuel consumption refers to fuel consumed by the vehicle while traveling the target course, which includes fuel and electric energy for a hybrid vehicle.
It can be understood that the control strategy refers to a strategy for controlling drag of the same type of brake calipers, after the current drag torque, the vehicle deceleration and the fuel consumption of the drag of the brake calipers are obtained, the current drag torque, the vehicle deceleration and the fuel consumption are respectively compared with the historical drag torque, the historical deceleration and the historical fuel consumption, when the comparison result shows that the current drag torque is smaller than the historical drag torque, the vehicle deceleration is smaller than the historical deceleration and the fuel consumption is smaller than the historical fuel consumption, the control method for drag of the brake calipers of the present embodiment is packaged into a corresponding control strategy, and drag of the same type of brake calipers in the present embodiment is controlled through the control strategy.
It should be understood that the historical drag torque, the historical deceleration, and the historical fuel consumption are performance parameters of brake caliper drag by setting the disc clearance of the brake disc pads to be in the range of 0.1-0.15mm, and referring to fig. 3, fig. 3 is a brake caliper drag torque diagram, specifically: curve 1 is the brake caliper dragging moment after setting for the clearance, and curve 2 is the moment that drags the hysteresis through this embodiment control brake caliper, and when hydraulic pressure was 7Mpa, can know through the dragging moment of comparison curve 1 and curve 2, can effectively reduce brake caliper dragging moment through the control method of this embodiment, realizes "zero ization" basically, will brake caliper dragging moment reduce to about 1.5Nm, refer to FIG. 4, and FIG. 4 is whole car pedal feel schematic diagram, specifically is: curve 3 is the whole car pedal feel after setting up the clearance, curve 4 is the whole car pedal feel of dragging laggard through this embodiment control brake caliper, can reflect the real car result of whole car pedal feel through deceleration, when the pedal stroke is 30mm, can know through comparing curve 3 and curve 4, curve 4's deceleration is obviously higher than curve 3's deceleration, that is to say this embodiment whole car pedal feel is better when control brake caliper drags laggard, make when reducing brake caliper dragging moment, can guarantee the pedal feel of whole car, refer to fig. 5, fig. 5 is the oil consumption schematic diagram, specifically do: rectangle 1 and rectangle 3 are the oil consumption after setting for the clearance, and rectangle 2 and rectangle 4 are the oil consumption of controlling the brake caliper after dragging through this embodiment, and it can be known through comparing rectangle 1 and rectangle 2, rectangle 3 and rectangle 4 that this embodiment controls the oil consumption of brake caliper after dragging and obviously reduces by a wide margin compared with the oil consumption after setting for the clearance, refer to fig. 6, and fig. 6 is the power consumption schematic diagram, specifically is: the rectangles 5, 7 and 9 are the power consumption after the gap is set, the rectangles 6, 8 and 10 are the power consumption after the brake caliper drag delay is controlled by the embodiment, and the comparison of the rectangles 5 and 6, the rectangles 7 and 8 and the rectangles 9 and 10 shows that the power consumption after the brake caliper drag delay is controlled by the embodiment is obviously greatly reduced compared with the power consumption after the gap is set.
The method comprises the steps of obtaining a current pedal travel sensing signal of a target vehicle; determining whether an actuating signal exists in a target control unit or not according to the current pedal travel sensing signal; when an actuating signal exists in the target control unit, building pressure on a target brake system according to a preset calibration rate to obtain a target pedal travel sensing signal; controlling dragging of the brake calipers according to the target pedal travel sensing signal and a preset pedal braking threshold value; because this embodiment has actuating signal at the target control unit, through target footboard stroke sensing signal and predetermine footboard braking threshold control braking system hydraulic pressure to realize the control that brake caliper drags, thereby can effectively improve the accuracy of control brake caliper drags, and then when reducing brake caliper drags moment, guarantee the footboard of whole car and feel.
In an embodiment, as shown in fig. 7, a second embodiment of the method for controlling brake caliper dragging according to the present invention is proposed based on the first embodiment, and the step S20 includes:
and step S201, when the target control unit does not have an actuating signal, calculating the current pedal stepping rate according to the current pedal stroke sensing signal.
It should be understood that the current pedal stepping rate refers to a rate at which a user steps on a brake pedal, and is calculated according to the current pedal stepping rate, before calculating the current pedal stepping rate, it is required to determine whether an actuation signal exists in the target control unit, that is, whether an actuation signal exists in the ADAS unit or the CRBS unit, and if not, the current pedal stepping rate is calculated according to a rate calculation strategy, so as to obtain the current pedal stepping rate.
Further, step S201 includes: when the target control unit does not have an actuating signal, obtaining a corresponding pedal stepping period and a corresponding pedal stroke variable quantity according to the current pedal stroke sensing signal; and calculating the pedal stepping period and the pedal stroke variable quantity to obtain the current pedal stepping rate.
It is understood that the pedal depression period refers to a period of time taken by a user to depress a brake pedal, the pedal stroke change amount refers to a stroke change amount of a pedal stroke from an initial position to a target position, and when it is determined that the target control unit does not have the actuation signal, the pedal depression period and the pedal stroke change amount are calculated to obtain a current pedal depression rate, for example, when the pedal depression period is T, the pedal stroke change amount is Δ S, and then the current pedal depression rate V =Δs/T.
And step S202, determining the driving intention of the user according to the current pedal stepping rate.
It is understood that the driving intention refers to an intention of the user while driving the vehicle, the driving intention including a braking intention and an accelerating intention, the driving intention of the user being determined by the current pedal depressing rate, for example, the driving intention of the user is the accelerating intention when the current pedal depressing rate is greatly increased or remains unchanged, and conversely, the driving intention of the user is the braking intention.
And step S203, when the driving intention is a braking intention, building pressure on a target braking system within target time according to a target set speed to obtain a target pedal travel sensing signal.
It should be understood that the target set rate refers to a rate set when the pressure build-up is performed under emergency or conventional braking conditions, when the driving intention of the user is determined to be the braking intention, the target braking system is built up to 2-3bar through the target set rate, and after the pressure build-up is completed, the pedal stroke sensing signal is acquired in real time through the pedal stroke sensor to obtain the target pedal stroke sensing signal.
Further, step S203 includes: when the driving intention is a braking intention, carrying out pressure build-up on a target braking system in a first time according to a first set speed; building pressure on the target brake system within a second time according to a second set speed; and obtaining a target pedal stroke sensing signal through the pressurized target brake system.
It will be understood that the first set rate refers to the rate set when the pressure is built up under emergency braking conditions, the first set rate may be β 1, the first time refers to the time it takes to build up pressure under emergency braking conditions, the first time may be 70-100ms, and likewise, the second set rate refers to the rate set when the pressure is built up under normal braking conditions, the second set rate is β 2, the second time refers to the time it takes to build up pressure under normal braking conditions, the second time may be 100-120ms.
It should be understood that after the first set rate, the second set rate, the first time and the second time are obtained, the target brake system is pressurized within the first time according to the first set rate, then the target brake system is pressurized within the second time according to the second set rate, so that the pressure of the target brake system is 2-3bar within the first time or the second time, and then a target pedal stroke sensing signal is acquired through the pedal stroke sensor and is transmitted to the electronic booster control module or the vehicle dynamic control module.
In the embodiment, when the target control unit does not have an actuating signal, the current pedal stepping rate is calculated according to the current pedal travel sensing signal; determining a driving intention of a user according to the current pedal stepping rate; when the driving intention is a braking intention, building pressure on a target braking system within a target time according to a target set speed to obtain a target pedal travel sensing signal; according to the embodiment, whether the target control unit has the actuating signal or not is judged, if not, the driving intention of the user is determined through the current pedal stepping rate, then whether the driving intention of the user is the braking intention or not is continuously judged, if yes, the target braking system is pressurized within the target time according to the set rate, and the stroke signal of the brake pedal is acquired through the pedal stroke sensor after the pressurization is completed, so that the accuracy of obtaining the target pedal stroke sensing signal can be effectively improved, and the driving experience of the user is further improved.
In an embodiment, as shown in fig. 8, a third embodiment of the method for controlling brake caliper dragging according to the present invention is proposed based on the first embodiment, and the step S40 includes:
and S401, obtaining the current pedal braking stroke according to the target pedal stroke sensing signal.
It is understood that the current pedal braking stroke refers to a stroke that the brake pedal passes when being stepped on by a user, and specifically, the current pedal braking stroke is obtained through a target pedal stroke sensing signal acquired by a pedal stroke sensor.
Further, after step S401, the method further includes: when the current pedal braking travel is smaller than a preset pedal braking threshold value, acquiring the current pressure of a target braking system; and reducing the current pressure of the target brake system according to a preset pressure relief strategy so as to reduce the dragging torque of the brake caliper.
It should be understood that the preset pedal braking threshold refers to a minimum braking value determined to control brake caliper dragging, the current pressure refers to the pressure of a target brake system after pressure build-up, and the preset pressure relief strategy refers to a strategy for reducing the pressure of the target brake system, that is, when the current pedal braking stroke is smaller than the preset pedal braking threshold within a certain time, the current pressure of the target brake system is actively reduced through the preset pressure relief strategy, so that the moment of brake caliper dragging is reduced.
And S402, when the current pedal braking stroke is greater than or equal to a preset pedal braking threshold value, performing hydraulic braking on the hydraulic pressure of a braking system according to a preset hydraulic pressure-stroke characteristic, and controlling the dragging of the brake caliper through the control of the hydraulic pressure of the braking system.
It should be understood that the preset hydraulic-stroke characteristic refers to a characteristic of hydraulically braking the hydraulic pressure of the brake system, which is preset at an early stage of vehicle design, and represents a specific relationship between two parameters (hydraulic pressure and stroke), that is, when the current pedal braking stroke is greater than or equal to a preset pedal braking threshold value, a hydraulic braking momentum of the hydraulic pressure of the brake system is determined by the preset hydraulic-stroke characteristic, specifically: after the current pedal braking stroke is obtained, if the current pedal braking stroke is judged to be larger than or equal to the preset pedal braking threshold value, hydraulic braking is carried out on the hydraulic pressure of the braking system through the preset hydraulic pressure-stroke characteristic, dragging control over the brake calipers can be achieved when the braking hydraulic system is hydraulically braked, and pedal feeling of the whole vehicle can be guaranteed.
The current pedal braking stroke is obtained according to the target pedal stroke sensing signal; when the current pedal braking stroke is greater than or equal to a preset pedal braking threshold value, performing hydraulic braking on the hydraulic pressure of a braking system according to a preset hydraulic pressure-stroke characteristic, and controlling dragging of the brake calipers through the control of the hydraulic pressure of the braking system; according to the embodiment, the current pedal braking travel is obtained through the target pedal travel sensing signal, whether the current pedal braking travel is larger than or equal to the preset pedal braking threshold value or not is judged, if yes, hydraulic braking is carried out on the braking system according to the preset hydraulic pressure-travel characteristic, the brake calipers are controlled to be dragged through braking of the brake hydraulic system, and the accuracy of controlling dragging of the brake calipers can be effectively improved.
In addition, an embodiment of the present invention further provides a storage medium, where the storage medium stores a control program of brake caliper dragging, and the control program of brake caliper dragging is executed by a processor to implement the steps of the control method of brake caliper dragging described above.
Since the storage medium adopts all technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here.
Further, referring to fig. 9, an embodiment of the present invention further provides a brake caliper dragging control device, including:
the acquiring module 10 is used for acquiring a current pedal travel sensing signal of the target vehicle.
And the determining module 20 is used for determining whether an actuating signal exists in the target control unit according to the current pedal stroke sensing signal.
And the pressure building module 30 is used for building pressure on the target brake system according to a preset calibration rate when an actuating signal exists in the target control unit, so as to obtain a target pedal travel sensing signal.
And the control module 40 is used for controlling the dragging of the brake caliper according to the target pedal travel sensing signal and a preset pedal braking threshold value.
The embodiment obtains the current pedal travel sensing signal of the target vehicle; determining whether an actuating signal exists in a target control unit according to the current pedal travel sensing signal; when an actuating signal exists in the target control unit, building pressure on a target brake system according to a preset calibration rate to obtain a target pedal stroke sensing signal; controlling dragging of the brake calipers according to the target pedal travel sensing signal and a preset pedal braking threshold value; because this embodiment has actuating signal at the target control unit, through target footboard stroke sensing signal and predetermine footboard braking threshold control braking system hydraulic pressure to realize the control that brake caliper drags, thereby can effectively improve the accuracy of control brake caliper drags, and then when reducing brake caliper drags moment, guarantee the footboard of whole car and feel.
It should be noted that the above-described work flows are only exemplary, and do not limit the scope of the present invention, and in practical applications, a person skilled in the art may select some or all of them to achieve the purpose of the solution of the embodiment according to actual needs, and the present invention is not limited herein.
In addition, the technical details that are not described in detail in this embodiment can be referred to the method for controlling brake caliper dragging provided by any embodiment of the present invention, and are not described herein again.
In one embodiment, the determining module 20 is further configured to calculate a current pedal depressing rate according to the current pedal stroke sensing signal when the target control unit does not have an actuating signal; determining a driving intention of a user according to the current pedal stepping rate; and when the driving intention is a braking intention, building pressure on a target braking system within a target time according to a target set speed to obtain a target pedal travel sensing signal.
In an embodiment, the determining module 20 is further configured to, when the target control unit does not have an actuation signal, obtain a corresponding pedal stepping period and a corresponding pedal stroke variation according to the current pedal stroke sensing signal; and calculating the pedal stepping period and the pedal stroke variable quantity to obtain the current pedal stepping rate.
In one embodiment, the determining module 20 is further configured to build pressure on the target brake system for a first time according to a first set rate when the driving intention is a braking intention; building pressure on the target brake system within a second time according to a second set speed; and obtaining a target pedal stroke sensing signal through the pressurized target brake system.
In an embodiment, the control module 40 is further configured to obtain a current pedal braking stroke according to the target pedal stroke sensing signal; and when the current pedal braking stroke is greater than or equal to a preset pedal braking threshold value, performing hydraulic braking on the hydraulic pressure of the braking system according to a preset hydraulic pressure-stroke characteristic, and controlling the dragging of the brake caliper by controlling the hydraulic pressure of the braking system.
In an embodiment, the control module 40 is further configured to obtain a current pressure of the target brake system when the current pedal braking stroke is smaller than a preset pedal braking threshold; and reducing the current pressure of the target brake system according to a preset pressure relief strategy so as to reduce the dragging torque of the brake caliper.
In one embodiment, the control module 40 is further configured to obtain a current brake caliper dragging torque, a vehicle deceleration, and a fuel consumption; when the current dragging torque is smaller than the historical dragging torque, the vehicle deceleration is smaller than the historical deceleration, and the fuel consumption is smaller than the historical fuel consumption, a control strategy for dragging the brake calipers is generated; and controlling the dragging of the brake calipers of the target model through the control strategy.
Other embodiments or methods of implementing the brake caliper dragging control device according to the present invention can be found in the method embodiments described above and are not to be considered as redundant herein.
Further, it is to be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system 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 system. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention or portions thereof that contribute to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (e.g. Read Only Memory (ROM)/RAM, magnetic disk, optical disk), and includes several instructions for enabling a terminal device (which may be a mobile phone, a computer, an integrated platform workstation, or a network device, etc.) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A control method of brake caliper dragging, characterized by comprising the following steps:
acquiring a current pedal travel sensing signal of a target vehicle;
determining whether an actuating signal exists in a target control unit according to the current pedal stroke sensing signal, wherein the target control unit comprises an advanced driving auxiliary control unit or a braking energy control unit;
when an actuating signal exists in the target control unit, building pressure on a target brake system according to a preset calibration rate to obtain a target pedal stroke sensing signal;
and controlling the dragging of the brake caliper according to the target pedal travel sensing signal and a preset pedal braking threshold value.
2. The method of controlling brake caliper dragging according to claim 1, wherein after determining whether an actuation signal is present at a target control unit based on the current pedal stroke sensing signal, further comprising:
when the target control unit does not have an actuating signal, calculating the current pedal stepping rate according to the current pedal stroke sensing signal;
determining a driving intention of a user according to the current pedal stepping rate;
and when the driving intention is a braking intention, building pressure on a target braking system within target time according to a target set speed to obtain a target pedal travel sensing signal.
3. The method of brake caliper dragging control of claim 2 wherein said calculating a current pedal rate from said current pedal stroke sense signal in the absence of an actuation signal from said target control unit comprises:
when the target control unit does not have an actuating signal, obtaining a corresponding pedal treading period and a corresponding pedal stroke variable quantity according to the current pedal stroke sensing signal;
and calculating the pedal stepping period and the pedal stroke variable quantity to obtain the current pedal stepping rate.
4. The brake caliper tie-off control method of claim 2, wherein the target set rate includes a first set rate and a second set rate, and the target time includes a first time and a second time;
when the target control unit has an actuating signal, the target brake system is pressurized according to a preset calibration rate to obtain a target pedal travel sensing signal, and the method comprises the following steps:
when the driving intention is a braking intention, carrying out pressure build-up on a target braking system in a first time according to a first set speed;
building pressure on the target brake system within a second time according to a second set speed;
and obtaining a target pedal stroke sensing signal through the pressurized target brake system.
5. The method of controlling brake caliper creep according to claim 1, wherein said controlling brake caliper creep based on said target pedal travel sensing signal and a preset pedal braking threshold comprises:
obtaining the current pedal braking travel according to the target pedal travel sensing signal;
and when the current pedal braking stroke is greater than or equal to a preset pedal braking threshold value, performing hydraulic braking on the hydraulic pressure of the braking system according to a preset hydraulic pressure-stroke characteristic, and controlling the dragging of the brake caliper by controlling the hydraulic pressure of the braking system.
6. The method of controlling brake caliper dragging according to claim 5, wherein said deriving a current pedal brake stroke from said target pedal stroke sensing signal further comprises:
when the current pedal braking travel is smaller than a preset pedal braking threshold value, acquiring the current pressure of a target braking system;
and reducing the current pressure of the target brake system according to a preset pressure relief strategy so as to reduce the dragging torque of the brake caliper.
7. The method of controlling brake caliper creep according to any one of claims 1 to 6, after said controlling brake caliper creep based on said target pedal travel sensing signal and a preset pedal braking threshold, further comprising:
acquiring the current dragging torque dragged by the brake calipers, the vehicle deceleration and the fuel consumption;
when the current dragging torque is smaller than the historical dragging torque, the vehicle deceleration is smaller than the historical deceleration, and the fuel consumption is smaller than the historical fuel consumption, a control strategy for dragging the brake calipers is generated;
and controlling the dragging of the brake calipers of the target model through the control strategy.
8. A control device of brake caliper dragging characterized in that it comprises:
the acquisition module is used for acquiring a current pedal travel sensing signal of a target vehicle;
the determining module is used for determining whether an actuating signal exists in a target control unit according to the current pedal travel sensing signal, and the target control unit comprises an advanced driving auxiliary control unit or a braking energy control unit;
the pressure building module is used for building pressure on a target brake system according to a preset calibration rate when an actuating signal exists in the target control unit to obtain a target pedal travel sensing signal;
and the control module is used for controlling the dragging of the brake calipers according to the target pedal travel sensing signal and a preset pedal braking threshold value.
9. A brake caliper tie-off control apparatus, comprising: a memory, a processor and a brake caliper tie-off control program stored on the memory and executable on the processor, the brake caliper tie-off control program being configured with a control method implementing a brake caliper tie-off according to any one of claims 1 to 7.
10. A storage medium, characterized in that it stores thereon a control program of brake caliper dragging which, when executed by a processor, implements a control method of brake caliper dragging according to any one of claims 1 to 7.
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| CN202210175811.XA CN114454855B (en) | 2022-02-24 | 2022-02-24 | Brake caliper dragging control method, device, equipment and storage medium |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0454326A (en) * | 1990-06-22 | 1992-02-21 | Aisin Seiki Co Ltd | Brake for vehicle |
| CN203009663U (en) * | 2012-12-30 | 2013-06-19 | 麦格纳斯太尔汽车技术（上海）有限公司 | Automobile brake device of caliper dragging torque and liquid measure displacement optimization |
| CN103707866A (en) * | 2012-10-05 | 2014-04-09 | 现代自动车株式会社 | Braking system for hybrid vehicle and control method for the same |
| CN105383461A (en) * | 2014-09-02 | 2016-03-09 | 福特全球技术公司 | Method and system for reducing brake drag |
| CN107225978A (en) * | 2017-05-03 | 2017-10-03 | 北京新能源汽车股份有限公司 | Brake of electric vehicle method, device and electric car |
| CN113928285A (en) * | 2021-09-30 | 2022-01-14 | 浙江吉利控股集团有限公司 | Method for reducing drag torque of brake |
-
2022
- 2022-02-24 CN CN202210175811.XA patent/CN114454855B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0454326A (en) * | 1990-06-22 | 1992-02-21 | Aisin Seiki Co Ltd | Brake for vehicle |
| CN103707866A (en) * | 2012-10-05 | 2014-04-09 | 现代自动车株式会社 | Braking system for hybrid vehicle and control method for the same |
| CN203009663U (en) * | 2012-12-30 | 2013-06-19 | 麦格纳斯太尔汽车技术（上海）有限公司 | Automobile brake device of caliper dragging torque and liquid measure displacement optimization |
| CN105383461A (en) * | 2014-09-02 | 2016-03-09 | 福特全球技术公司 | Method and system for reducing brake drag |
| CN107225978A (en) * | 2017-05-03 | 2017-10-03 | 北京新能源汽车股份有限公司 | Brake of electric vehicle method, device and electric car |
| CN113928285A (en) * | 2021-09-30 | 2022-01-14 | 浙江吉利控股集团有限公司 | Method for reducing drag torque of brake |
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