CN111959471A - Braking force compensation method and device based on decoupling type electronic booster - Google Patents
Braking force compensation method and device based on decoupling type electronic booster Download PDFInfo
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- CN111959471A CN111959471A CN202010854802.4A CN202010854802A CN111959471A CN 111959471 A CN111959471 A CN 111959471A CN 202010854802 A CN202010854802 A CN 202010854802A CN 111959471 A CN111959471 A CN 111959471A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005562 fading Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000013021 overheating Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/321—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration deceleration
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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
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/745—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
- Braking Systems And Boosters (AREA)
Abstract
The invention discloses a braking force compensation method based on a decoupling type electronic booster, which comprises the following steps of: acquiring an opening signal of a brake pedal, and calculating the required deceleration during braking according to the opening signal; acquiring a vehicle speed value of a vehicle in real time, and calculating the actual deceleration of the vehicle according to the vehicle speed value; judging whether the actual deceleration reaches the required deceleration within a preset time; if not, acquiring the temperature of the brake; judging whether the temperature of the brake is greater than a first preset value or not; if so, the decoupling type electronic booster compensates the braking force, so that the actual deceleration reaches the required deceleration, the requirement of a driver is met, and the running safety of the vehicle is ensured. In addition, the invention discloses a braking force compensation device based on the decoupling type electronic booster.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a braking force compensation method and device based on a decoupling type electronic booster.
Background
In recent years, along with the higher requirements of consumers on the comfort and the safety of automobiles, more electromechanical products appear in the field of automobile braking, the scheme of the electronic booster is becoming a mainstream design, and compared with the traditional vacuum booster, the electronic booster has natural and huge advantages in the aspects of accelerating the pressure build-up rate, improving the maximum boosting capacity and guaranteeing the safety of automobile braking.
After the brake in the finished automobile basic brake system comprises a brake caliper and a brake friction plate, the brake caliper and the brake friction plate are continuously braked, as shown in the attached drawings 1 to 3, the generated brake force is obviously reduced under the condition of the same brake pressure along with the increase of the temperature of the brake, namely, the brake efficiency is obviously reduced, at the moment, for the traditional vacuum booster system, even if a driver steps on a brake pedal with the maximum force, the vehicle cannot achieve enough brake force and brake deceleration, at the moment, the brake distance of the vehicle is increased, and the vehicle has safety risk.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the invention aims to provide a braking force compensation method and a braking force compensation device based on a decoupling type electronic booster, which can ensure that the output braking force still meets the requirements of a driver and ensures the running safety of a vehicle when a vehicle brake is overheated.
In order to achieve the above object, an embodiment of an aspect of the present invention provides a braking force compensation method based on a decoupled electronic booster, including the following steps:
acquiring an opening signal of a brake pedal, and calculating the required deceleration during braking according to the opening signal;
acquiring a vehicle speed value of a vehicle in real time, and calculating the actual deceleration of the vehicle according to the vehicle speed value;
judging whether the actual deceleration reaches the required deceleration within a preset time;
if not, acquiring the temperature of the brake;
judging whether the temperature of the brake is greater than a first preset value or not;
if yes, the decoupling type electronic booster compensates the braking force.
According to the braking force compensation method based on the decoupling type electronic booster, firstly, an opening signal of a brake pedal is obtained, and required deceleration during braking is calculated according to the opening signal; then acquiring a vehicle speed value of the vehicle in real time, and calculating the actual deceleration of the vehicle according to the vehicle speed value; then judging whether the actual deceleration reaches the required deceleration within the preset time; the actual deceleration does not reach the required deceleration within the preset time, and the temperature of the brake is obtained; judging whether the temperature of the brake is greater than a first preset value or not; if the temperature of the brake is greater than the first preset value, the decoupling type electronic booster compensates the braking force, so that the actual deceleration reaches the required deceleration, the requirement of a driver is met, and the running safety of the vehicle is guaranteed.
Optionally, the decoupling type electronic booster performing braking force compensation comprises:
and performing braking force compensation by driving a hydraulic piston through a motor until the actual deceleration reaches the required deceleration.
Optionally, before acquiring the opening degree signal of the brake pedal, the method further includes:
and acquiring a brake signal of a brake pedal.
Optionally, before acquiring the temperature of the brake; further comprising:
judging whether the vehicle speed value is greater than a second preset value or not;
if yes, the temperature of the brake is obtained.
Optionally, after determining whether the temperature of the brake is greater than a first preset value, the method further includes:
if so, a brake overheat signal is sent to the vehicle instrument.
Optionally, the calculating an actual deceleration of the vehicle from the vehicle speed value includes:
and obtaining the actual deceleration of the vehicle after the vehicle speed value and the time are derived and filtered.
In order to achieve the above object, another embodiment of the present invention provides a braking force compensation device based on a decoupled electronic booster, including:
the deceleration demand module is used for acquiring an opening signal of a brake pedal and calculating deceleration demand during braking according to the opening signal;
the actual deceleration module is used for acquiring a vehicle speed value of the vehicle in real time and calculating the actual deceleration of the vehicle according to the vehicle speed value;
a first judgment module for judging whether the actual deceleration reaches the required deceleration within a preset time;
the temperature acquisition module is used for acquiring the temperature of the brake when the actual deceleration does not reach the required deceleration within the preset time;
the second judgment module is used for judging whether the temperature of the brake is greater than a first preset value or not;
and the braking force compensation module is used for compensating the braking force of the decoupling type electronic booster when the actual deceleration does not reach the required deceleration within the preset time.
According to the braking force compensation device based on the decoupling type electronic booster, which is provided by the embodiment of the invention, the opening degree signal of the brake pedal is obtained through the required deceleration module, and the required deceleration during braking is calculated according to the opening degree signal; then, acquiring a vehicle speed value of the vehicle in real time through an actual deceleration module, and calculating the actual deceleration of the vehicle according to the vehicle speed value; then the first judgment module judges whether the actual deceleration reaches the required deceleration within the preset time; the temperature acquisition module is used for acquiring the temperature of the brake when the actual deceleration does not reach the required deceleration within the preset time; and finally, when the actual deceleration does not reach the required deceleration within the preset time, the braking force compensation module performs braking force compensation through the decoupling type electronic booster so that the actual deceleration reaches the required deceleration, the requirement of a driver is met, and the running safety of the vehicle is ensured.
Optionally, the decoupling type electronic booster performing braking force compensation comprises:
and performing braking force compensation by driving a hydraulic piston through a motor until the actual deceleration reaches the required deceleration.
Optionally, the braking force compensation device based on the decoupled electronic booster further comprises:
and the brake signal acquisition module is used for acquiring the brake signal of the brake pedal.
Optionally, the braking force compensation device based on the decoupled electronic booster further includes:
and the third judgment module is used for judging whether the vehicle speed value is greater than a second preset value.
If yes, the temperature of the brake is obtained.
Optionally, the braking force compensation device based on the decoupled electronic booster further includes:
and the overheating signal sending module is used for sending a brake overheating signal to a vehicle instrument after judging that the temperature of the brake is greater than a first preset value.
Optionally, the braking force compensation device based on the decoupled electronic booster further includes:
and the actual deceleration calculating module is used for obtaining the actual deceleration of the vehicle after derivation and filtering of the vehicle speed value and the time.
Compared with the prior art, the method has the following beneficial effects: the brake in the finished automobile basic brake system comprises a brake caliper and a brake friction plate, after continuous braking, the output braking force can still meet the requirements of a driver along with the temperature rise of the brake, the automobile can achieve sufficient braking force and braking deceleration, the braking distance of the automobile cannot be increased, and the running safety of the automobile is ensured.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which,
FIG. 1 is a graph of vehicle braking torque as a function of temperature increase for brake shoes of different materials in the prior art;
FIG. 2 is a graph of deceleration with increasing temperature for a prior art vehicle having brake shoes of different materials;
FIG. 3 is a bar graph of braking distance for a vehicle braking from 100kph to 0kph multiple consecutive times in the prior art;
FIG. 4 is a flow chart of a braking force compensation method based on a decoupled electronic booster according to an embodiment of the invention;
FIG. 5 is a flowchart of a method for compensating braking force based on a decoupled electronic booster according to an embodiment of the present invention;
FIG. 6 is a flow chart of a method for compensating braking force based on a decoupled electronic booster according to an embodiment of the invention;
fig. 7 is a graph showing the variation of the brake pressure with the pedal opening degree;
FIG. 8 is a graph of deceleration versus brake pressure output by the brake;
FIG. 9 is a flowchart of a method for compensating braking force based on a decoupled electronic booster according to an embodiment of the present invention;
FIG. 10 is a flowchart of a method for compensating braking force based on a decoupled electronic booster according to an embodiment of the present invention;
FIG. 11 is a block diagram of a decoupled electronic booster based braking force compensation arrangement according to an embodiment of the present invention;
fig. 12 is a block diagram of a braking force compensation device based on a decoupled electronic booster according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
The following describes a braking force compensation method and device based on a decoupled electronic booster according to an embodiment of the present invention with reference to the accompanying drawings.
FIG. 1 is a graph of vehicle braking torque as a function of temperature for prior art brake shoes of different materials. FIG. 2 is a graph showing deceleration of a vehicle having a brake pad of a different material according to a conventional art as a function of temperature. FIG. 3 is a bar graph of braking distance for a vehicle braking from 100kph to 0kph (kilometers per hour) multiple consecutive times in the prior art. As can be seen from fig. 1, the braking torque of the vehicle decreases with increasing temperature; as can be seen from fig. 2, the deceleration of the vehicle decreases as the temperature increases; as can be seen from fig. 3, with a plurality of successive braking, the temperature gradually rises and the braking distance becomes longer. Thus, as the temperature increases, the output of the vehicle braking force cannot meet the driver's demand, and thus, danger is liable to occur during driving.
FIG. 4 is a flowchart of a braking force compensation method based on a decoupled electronic booster according to an embodiment of the invention. As shown in fig. 4, the compensation method includes the following steps:
s101, acquiring an opening signal of a brake pedal, and calculating a required deceleration during braking according to the opening signal;
when a driver needs to brake in an emergency or a traffic light and the like in the driving process, the driver treads a brake pedal, and the decoupling type electronic booster calculates the required deceleration during braking according to the opening degree signal of the brake pedal.
S102, acquiring a vehicle speed value of the vehicle in real time, and calculating the actual deceleration of the vehicle according to the vehicle speed value;
as shown in fig. 5, the calculation of the actual deceleration of the vehicle includes: and S1021, deriving the vehicle speed value and the time, filtering, and acquiring the actual deceleration of the vehicle.
S103, judging whether the actual deceleration reaches the required deceleration within the preset time;
the preset time may be 500ms, and the actual deceleration of the vehicle does not reach the required deceleration within 500ms, which indicates that the vehicle is in a braking force insufficiency state.
S104, if not, acquiring the temperature of the brake;
the temperature of the brake can be obtained by a temperature sensor, wherein the type of the temperature sensor is not specifically limited herein.
S105, judging whether the temperature of the brake is greater than a first preset value or not;
and S106, if so, performing braking force compensation on the decoupling type electronic booster.
As shown in fig. 6, the compensating the braking force by the decoupled electronic booster includes:
and S1061, driving the hydraulic piston to compensate the braking force through the motor until the actual deceleration reaches the required deceleration.
A certain gap exists between a pedal push rod of the decoupling type electronic booster and a hydraulic main cylinder piston.
Specifically, at the time of braking by the driver, the degree of opening of the stepping on the brake pedal represents the driver's demand, i.e., the demanded deceleration, and the motor controls the driving of the hydraulic piston in accordance with the demanded deceleration, i.e., the driver's demand, to output the actual braking force. Wherein the actual braking force should correspond to the driver's demand. When the braking force actually output within a preset time, that is, within 500ms, is inconsistent with the driver's demand, it is indicated that the braking force of the vehicle is insufficient, and then it is required to determine whether the temperature of the brake is greater than a first preset value, where the first preset value may be one of 200 ℃ to 300 ℃, and the specific value is specifically set according to the type of the vehicle, and is not specifically limited herein. When the temperature of the brake is larger than a first preset value, the decoupling type electronic booster controls the motor to continuously increase the output power, so that the actually output braking force is consistent with the requirement of a driver, namely the actually output deceleration reaches the required deceleration. For example, when a driver steps on a brake pedal, the pedal opening is 90%, the required braking force is 110bar, the actual braking force is 90bar within 500ms, 90bar is less than 110bar, and the temperature of the brake is greater than a first preset value, which indicates that the vehicle brake is overheated, the decoupling type electronic booster controls the motor to continuously increase the output power, so that the actual braking force is 110bar, the requirement of the driver is met, and the driving safety is guaranteed.
It should be noted that, when the decoupling type electronic booster controls the motor to continue increasing the output power, the requirement of the driver is always kept unchanged.
In addition, when the braking force actually output in the preset time, namely 500ms, is inconsistent with the requirement of the driver, and the temperature of the brake is less than or equal to the first preset value, the brake is not overheated at the moment, and the decoupling type electronic booster does not need to control the motor to continuously increase the output power.
Fig. 7 is a graph showing the variation of the brake pressure with the pedal opening. In fig. 7, the horizontal axis represents the pedal opening degree, which represents the braking force demand of the driver, and the vertical axis represents the actual braking pressure of the brake, when the brake does not undergo thermal decay (i.e., when the temperature of the brake is less than or equal to the first preset value), the actual deceleration generated by the actual braking force is consistent with the value of the driver demand, and when the thermal decay occurs (i.e., when the temperature of the brake is greater than the first preset value), the actually generated braking force drops seriously (e.g., thermal decay occurs between 80% and 100% of the pedal opening degree in fig. 7) under the same driver demand as the temperature rises, and at this time, the original boosting force cannot meet the driver demand, and in this case, the conventional vacuum booster cannot effectively increase the braking force any more (as shown by the line B in the. On the basis of the decoupling type electronic booster, after a heat fading working condition (namely the temperature of a brake is greater than a first preset value) is identified, the maximum boosting capacity of the booster is increased, so that the deceleration of the whole vehicle is increased, and the safety of the vehicle is ensured (as shown by a line in the figure).
As shown in fig. 8, the horizontal axis represents the brake pressure output from the brake and the vertical axis represents the deceleration, and as shown by line a in the figure, the brake pressure output from the brake can satisfy the actual deceleration, i.e., the driver's demand, in the normal state (the temperature of the brake is less than or equal to the first preset value). Under the condition of heat fading (the temperature of the brake is greater than the first preset value), as shown by a line B in the figure, the actual deceleration is seriously reduced, the boosting can not be continuously increased after the conventional vacuum booster reaches the output braking force of 120bar, the deceleration of the vehicle can not be continuously increased, and the deceleration can only reach 0.7 g. Based on the decoupling type electronic booster, after heat fading occurs, the output power of the motor can be continuously increased, the system is increased to 160bar from the original 120bar, the deceleration of the vehicle is increased to 1g, and the requirement of a driver is met. Namely, the decoupling type electronic booster can continuously increase the boosting force, so that the actual deceleration of the vehicle reaches the required deceleration.
Alternatively, as shown in fig. 9, before acquiring the opening degree signal of the brake pedal, the method further includes:
and S100, acquiring a brake signal of a brake pedal.
The brake signal of the brake pedal may be a "0" signal and a "1" signal, and when the brake signal is the "0" signal, it indicates that the brake pedal is not stepped on by the driver, and when the brake signal is the "1" signal, it indicates that the brake pedal is stepped on by the driver.
Alternatively, as shown in fig. 10, before the temperature of the brake is acquired; further comprising:
s107, judging whether the vehicle speed value is larger than a second preset value or not;
if yes, the temperature of the brake is obtained.
Wherein, the second preset value can be 10 kph. That is, when the braking force of the vehicle is insufficient and the vehicle speed is greater than 10kph, the temperature of the brake is obtained, and whether the brake is overheated or not is determined. That is, when the vehicle braking force is insufficient and the vehicle speed value is less than 10kph, the brake is not determined to be overheated.
Optionally, as shown in fig. 10, after determining whether the temperature of the brake is greater than the first preset value, the method further includes:
and S108, if so, sending a brake overheating signal to a vehicle instrument to remind a driver of safety in driving.
In summary, according to the braking force compensation method based on the decoupling type electronic booster provided by the embodiment of the invention, firstly, an opening signal of a brake pedal is obtained, and a required deceleration during braking is calculated according to the opening signal; then acquiring a vehicle speed value of the vehicle in real time, and calculating the actual deceleration of the vehicle according to the vehicle speed value; then judging whether the actual deceleration reaches the required deceleration within the preset time; the actual deceleration does not reach the required deceleration within the preset time, and the temperature of the brake is obtained; judging whether the temperature of the brake is greater than a first preset value or not; if the temperature of the brake is greater than the first preset value, the decoupling type electronic booster compensates the braking force, so that the actual deceleration reaches the required deceleration, the requirement of a driver is met, and the running safety of the vehicle is guaranteed.
In order to achieve the above object, another embodiment of the present invention provides a braking force compensation device based on a decoupled electronic booster, as shown in fig. 11, including:
a deceleration demand module 100 configured to obtain an opening degree signal of a brake pedal, and calculate a deceleration demand during braking according to the opening degree signal;
the actual deceleration module 200 is used for acquiring a vehicle speed value of the vehicle in real time and calculating the actual deceleration of the vehicle according to the vehicle speed value;
a first judgment module 300, configured to judge whether the actual deceleration reaches the required deceleration within a preset time;
a temperature acquisition module 400 configured to acquire a temperature of the brake when the actual deceleration does not reach the required deceleration within a preset time;
a second judging module 500, configured to judge whether the temperature of the brake is greater than the first preset value;
and the braking force compensation module 600 is used for compensating the braking force of the decoupling type electronic booster when the actual deceleration does not reach the required deceleration within the preset time.
Optionally, the decoupling type electronic booster performing braking force compensation comprises:
and the motor drives the hydraulic piston to compensate the braking force until the actual deceleration reaches the required deceleration.
A certain gap exists between a pedal push rod of the decoupling type electronic booster and a hydraulic main cylinder piston.
Specifically, at the time of braking by the driver, the degree of opening of the stepping of the brake pedal represents the driver's demand, i.e., the demanded deceleration, and the motor controls the hydraulic piston drive in accordance with the demanded deceleration, i.e., the driver's demand, to output the actual braking force. Wherein the actual braking force should correspond to the driver's demand. When the braking force actually output within a preset time, namely 500ms, is inconsistent with the driver demand, it is indicated that the braking force of the vehicle is insufficient, and then it is required to judge whether the temperature of the brake is greater than a first preset value, wherein the first preset value can be 200-300 ℃, and when the temperature of the brake is greater than the first preset value, the decoupling type electronic booster controls the motor to continue to increase the output power, so that the actually output braking force is consistent with the driver demand, namely, the actual deceleration reaches the demanded deceleration. For example, when a driver steps on a brake pedal, the pedal opening is 90%, the required braking force is 110bar, the actual braking force is 90bar within 500ms, 90bar is less than 110bar, and the temperature of the brake is greater than a first preset value, which indicates that the vehicle brake is overheated, the decoupling type electronic booster controls the motor to continuously increase the output power, so that the actual braking force is 110bar, the requirement of the driver is met, and the driving safety is guaranteed.
In addition, when the braking force actually output in the preset time, namely 500ms, is inconsistent with the requirement of the driver, and the temperature of the brake is less than or equal to the first preset value, the brake is not overheated at the moment, and the decoupling type electronic booster does not need to control the motor to continuously increase the output power.
It should be noted that the first preset value and the preset time may be set according to different vehicle types, and are not limited herein.
Optionally, as shown in fig. 12, the braking force compensation device based on the decoupled electronic booster further includes:
the braking signal acquiring module 700 is configured to acquire a braking signal of a brake pedal.
The brake signal of the brake pedal may be a "0" signal and a "1" signal, and when the brake signal is the "0" signal, it indicates that the brake pedal is not stepped on by the driver, and when the brake signal is the "1" signal, it indicates that the brake pedal is stepped on by the driver.
Optionally, as shown in fig. 12, the braking force compensation device based on the decoupled electronic booster further includes:
and a third determining module 800, configured to determine whether the vehicle speed value is greater than the second preset value.
If yes, the temperature of the brake is obtained.
Wherein, the second preset value can be 10 kph. That is, when the braking force of the vehicle is insufficient and the vehicle speed is greater than 10kph, the temperature of the brake is obtained, and whether the brake is overheated or not is determined. That is, when the vehicle braking force is insufficient and the vehicle speed value is less than 10kph, the brake is not determined to be overheated.
Optionally, as shown in fig. 12, the braking force compensation device based on the decoupled electronic booster further includes:
and the overheat signal sending module 900 is configured to send a brake overheat signal to a vehicle instrument to remind a driver of safety in driving after the temperature of the brake is judged to be greater than the first preset value.
Optionally, the braking force compensation device based on the decoupled electronic booster, as shown in fig. 12, further includes:
and the actual deceleration calculating module 1000 is configured to derive the vehicle speed value and the time, and obtain the actual deceleration of the vehicle after filtering.
In summary, according to the braking force compensation device based on the decoupled electronic booster provided by the embodiment of the invention, the opening degree signal of the brake pedal is obtained through the required deceleration module, and the required deceleration during braking is calculated according to the opening degree signal; then, acquiring a vehicle speed value of the vehicle in real time through an actual deceleration module, and calculating the actual deceleration of the vehicle according to the vehicle speed value; then the first judgment module judges whether the actual deceleration reaches the required deceleration within the preset time; the temperature acquisition module is used for acquiring the temperature of the brake when the actual deceleration does not reach the required deceleration within the preset time; and finally, when the actual deceleration does not reach the required deceleration within the preset time, the braking force compensation module performs braking force compensation through the decoupling type electronic booster so that the actual deceleration reaches the required deceleration, the requirement of a driver is met, and the running safety of the vehicle is ensured.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
For this reason, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, etc., unless explicitly specified otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in interactive relationship with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a lesser level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A braking force compensation method based on a decoupling type electronic booster is characterized by comprising the following steps:
acquiring an opening signal of a brake pedal, and calculating the required deceleration during braking according to the opening signal;
acquiring a vehicle speed value of a vehicle in real time, and calculating the actual deceleration of the vehicle according to the vehicle speed value;
judging whether the actual deceleration reaches the required deceleration within a preset time;
if not, acquiring the temperature of the brake;
judging whether the temperature of the brake is greater than a first preset value or not;
if yes, the decoupling type electronic booster compensates the braking force.
2. The decoupled electronic booster based brake force compensation method according to claim 1, wherein the decoupled electronic booster performing brake force compensation comprises:
and performing braking force compensation by driving a hydraulic piston through a motor until the actual deceleration reaches the required deceleration.
3. The method for compensating the braking force based on the decoupled electronic booster of claim 1, further comprising, before acquiring the opening signal of the brake pedal:
and acquiring a brake signal of a brake pedal.
4. The decoupled electronic booster based braking force compensation method according to claim 1, characterized in that before the temperature of the brake is obtained; further comprising:
judging whether the vehicle speed value is greater than a second preset value or not;
if yes, the temperature of the brake is obtained.
5. The method for compensating the braking force based on the decoupled electronic booster of claim 1, further comprising, after determining whether the temperature of the brake is greater than a first preset value:
if so, a brake overheat signal is sent to the vehicle instrument.
6. The decoupled electronic booster-based brake force compensation method according to claim 1, wherein the calculating an actual deceleration of a vehicle from the vehicle speed value includes:
and obtaining the actual deceleration of the vehicle after the vehicle speed value and the time are derived and filtered.
7. A braking force compensation device based on a decoupling type electronic booster is characterized by comprising:
the deceleration demand module is used for acquiring an opening signal of a brake pedal and calculating deceleration demand during braking according to the opening signal;
the actual deceleration module is used for acquiring a vehicle speed value of the vehicle in real time and calculating the actual deceleration of the vehicle according to the vehicle speed value;
a first judgment module for judging whether the actual deceleration reaches the required deceleration within a preset time;
the temperature acquisition module is used for acquiring the temperature of the brake when the actual deceleration does not reach the required deceleration within the preset time;
the second judgment module is used for judging whether the temperature of the brake is greater than a first preset value or not;
and the braking force compensation module is used for compensating the braking force of the decoupling type electronic booster when the actual deceleration does not reach the required deceleration within the preset time.
8. The decoupled electronic booster based brake force compensation device according to claim 6, wherein the decoupled electronic booster performing brake force compensation comprises:
and performing braking force compensation by driving a hydraulic piston through a motor until the actual deceleration reaches the required deceleration.
9. The decoupled electronic booster based brake force compensation device of claim 6, further comprising:
and the brake signal acquisition module is used for acquiring the brake signal of the brake pedal.
10. The decoupled electronic booster based brake force compensation device of claim 6, further comprising:
and the third judgment module is used for judging whether the vehicle speed value is greater than a second preset value.
If yes, the temperature of the brake is obtained.
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| CN202010854802.4A CN111959471A (en) | 2020-08-21 | 2020-08-21 | Braking force compensation method and device based on decoupling type electronic booster |
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| CN113335258A (en) * | 2021-07-15 | 2021-09-03 | 安徽江淮汽车集团股份有限公司 | Brake pedal feel improving method |
| CN113386716A (en) * | 2021-07-01 | 2021-09-14 | 北京汽车集团越野车有限公司 | Control method, device and device for vehicle brake pedal and automobile |
| CN114394078A (en) * | 2022-01-14 | 2022-04-26 | 东风汽车集团股份有限公司 | Braking efficiency attenuation compensation device and method |
| CN114802166A (en) * | 2022-05-10 | 2022-07-29 | 北京汽车集团越野车有限公司 | Control method for keeping constant pedal feeling of automobile |
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| CN115534906A (en) * | 2022-12-01 | 2022-12-30 | 小米汽车科技有限公司 | Braking efficiency degradation compensation method, device, vehicle and storage medium |
| CN116118695A (en) * | 2023-01-06 | 2023-05-16 | 北京汽车集团越野车有限公司 | Vehicle brake control method and device, vehicle and electronic equipment |
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Application publication date: 20201120 |