CN112659908A - Automobile braking energy recovery control method, recovery system, automobile and medium - Google Patents
Automobile braking energy recovery control method, recovery system, automobile and medium Download PDFInfo
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- CN112659908A CN112659908A CN202110057660.3A CN202110057660A CN112659908A CN 112659908 A CN112659908 A CN 112659908A CN 202110057660 A CN202110057660 A CN 202110057660A CN 112659908 A CN112659908 A CN 112659908A
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Abstract
The embodiment of the invention provides an automobile braking energy recovery control method, a recovery system, an automobile and a medium, wherein the automobile braking energy recovery control method comprises the following steps: obtaining brake air pressure; determining an electronic braking proportion parameter and a mechanical braking proportion parameter according to the braking air pressure; and respectively controlling the braking of the electronic braking device and the braking of the mechanical braking device according to the electronic braking proportion parameter and the mechanical braking proportion parameter. According to the technical scheme, the stroke information of different brake pedals can be accurately judged by determining the brake air pressure, so that the braking of an electronic braking device and the braking of a mechanical braking device of the automobile can be accurately controlled, and the energy recovery is effectively carried out in the braking process.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to an automobile braking energy recovery control method, a braking energy recovery system, an automobile and a computer readable storage medium.
Background
In order to improve the utilization rate of energy, a braking energy recovery device is generally arranged in an automobile, and when a driver brakes through a braking pedal, the braking energy recovery device can convert kinetic energy of an automobile body into electric energy for recovery while electrically braking the automobile. However, in the prior art, the braking energy recovery device cannot accurately identify the braking intention of the driver, and in order to prevent accidents and ensure driving safety, pure mechanical braking is used more in practical situations, and hybrid braking is rarely used, so that the effect of braking energy recovery is affected.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
In view of this, a first aspect of the embodiments of the present invention provides a method for controlling recovery of braking energy of an automobile.
A second aspect of embodiments of the present invention provides a braking energy recovery system.
A third aspect of embodiments of the present invention provides an automobile.
A fourth aspect of embodiments of the present invention provides a computer-readable storage medium.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides an automobile braking energy recovery control method for an automobile, including: the automobile braking energy recovery control method comprises the following steps of: obtaining brake air pressure; determining an electronic braking proportion parameter and a mechanical braking proportion parameter according to the braking air pressure; and respectively controlling the braking of the electronic braking device and the braking of the mechanical braking device according to the electronic braking proportion parameter and the mechanical braking proportion parameter.
According to the method for controlling the recovery of the braking energy of the automobile, which is provided by the embodiment of the first aspect of the invention, the braking air pressure is firstly obtained. The electronic brake device and the mechanical brake device are arranged on the automobile body of the automobile, and both the electronic brake device and the mechanical brake device can brake the automobile body. When a driver steps on the pedal, the control device of the vehicle can determine the pedal stroke of the brake pedal according to the brake air pressure, and determine the electronic brake proportion parameter and the mechanical brake proportion parameter according to the obtained brake air pressure, so as to determine the hybrid brake with the optimal proportion, and can better recover the energy of the brake on the premise of ensuring the driving safety of the automobile. It should be noted that, the travel information of the brake pedal is determined by the brake air pressure, which does not affect the setting of the brake pedal or the moving position space, and the brake air pressure is easy to measure, the accuracy is high, and the measurement accuracy can be maintained even after long-time use, so that the travel information of different brake pedals can be accurately judged, no misjudgment can be caused, and further the braking of the electronic brake device and the mechanical brake device of the automobile can be accurately controlled.
Generally, a mechanical brake device brakes by a brake pad, and in this way, the kinetic energy of the automobile itself is converted into heat energy and finally dissipated. The electronic braking device brakes the automobile in an inversion mode, and the kinetic energy of the automobile can be converted into electric energy again to be stored, so that the energy recovery is realized. The mechanical brake device can realize quick emergency braking and is usually used for emergency, and under the condition, a driver usually steps the brake pedal to the bottom to realize maximum braking. In addition, the driver can often lightly step on the brake pedal to realize the speed reduction of the automobile. Therefore, the different braking intention of the driver is expressed as a difference in the stroke information of the brake pedal on which the brake pedal is depressed, and further as a difference in the brake air pressure. It can be understood that the mechanical brake proportion parameter and the electronic brake proportion parameter are controlled through the brake air pressure, and the electronic brake device and the mechanical brake device are further controlled to brake, so that reasonable and effective hybrid braking can be effectively carried out according to the brake intention of a driver.
In addition, the automobile braking energy recovery control method in the above scheme provided by the invention can also have the following additional technical features:
among the above-mentioned technical scheme, the car still includes: before the step of acquiring the braking air pressure, the automobile braking energy recovery control method further comprises the following steps: judging whether the travel of an accelerator pedal of the accelerator pedal is equal to 0 or not, and generating a first judgment result; judging whether the vehicle speed of the vehicle body is greater than 0 or not, and generating a second judgment result; if the first judgment result is yes and the second judgment result is yes, the brake air pressure is obtained.
In the technical scheme, the automobile also comprises an accelerator pedal, and when the accelerator pedal is pressed, namely the travel of the accelerator pedal is more than 0, the automobile body can keep running or accelerating. Obviously, when the travel of the accelerator pedal is greater than 0, the vehicle should not be braked.
Further, when the vehicle speed is equal to 0, the vehicle body is in a stationary state. It is apparent that the vehicle body does not need to be braked in this state.
Therefore, only when the travel of the accelerator pedal is judged to be 0 and the vehicle speed is greater than 0, the travel information of the brake pedal is acquired, so that the vehicle body is braked according to the travel information.
In the above technical scheme, the automobile further comprises a brake pedal, and the travel information of the brake pedal is in direct proportion to the brake air pressure.
In the technical scheme, the stroke information of the brake pedal is in direct proportion to the brake air pressure, so that the stroke information of the brake pedal can be conveniently obtained through the brake air pressure. The brake air pressure threshold value can be conveniently set according to the travel information of the brake pedal, so that the refinement of the electronic brake proportion parameter and the mechanical brake proportion parameter is realized, and the optimal effect of the hybrid brake effect under different conditions is further realized.
In the above technical solution, the step of determining the electric brake proportion parameter and the mechanical brake proportion parameter according to the brake air pressure specifically includes: judging whether the brake air pressure is 0 or not, and generating a first air pressure judgment result; if the first air pressure judgment result is yes, the electronic braking proportion parameter is 1, and the mechanical braking proportion parameter is 0; if the first air pressure judgment result is negative, judging whether the brake air pressure is larger than a second air pressure threshold value or not, and generating a second air pressure judgment result; if the second air pressure judgment result is yes, the electronic braking proportion parameter is 0, and the mechanical braking proportion parameter is 1; if the second air pressure judgment result is negative, the electronic braking proportion parameter and the mechanical braking proportion parameter are both greater than 0; and the sum of the electronic braking proportion parameter and the mechanical braking proportion parameter is 1.
In this technical solution, when the accelerator pedal stroke is 0 and the vehicle speed is greater than 0, it indicates that the vehicle body is in a coasting state. For the state, the automobile is braked in a slow braking mode, and the corresponding optimal braking mode is pure electric braking, so that the automobile can be braked, and energy can be fully recovered. In this case, therefore, the proportional parameter of the electric brake is set to 1, and the proportional parameter of the mechanical brake is set to 0, in order to implement the electric braking.
Further, when the brake air pressure is greater than a second air pressure threshold value, the mechanical brake proportion parameter is set to be 1, and the electronic brake proportion parameter is set to be 0, wherein the second air pressure threshold value corresponds to the travel information of the brake pedal with heavy braking. Obviously, the arrangement mode can realize the quick braking in a pure mechanical braking mode so as to ensure the driving safety of the automobile.
It should be noted that the sum of the electric braking proportion parameter and the mechanical braking proportion parameter is 1, and therefore it can be understood that the electric braking proportion parameter and the mechanical braking proportion parameter represent the proportion of the electric braking proportion parameter and the mechanical braking proportion parameter in the hybrid braking. The higher the ratio parameter, the higher the proportion of the braking method used in hybrid braking.
In the above technical solution, if the second air pressure determination result is negative, the step of making both the electric braking proportional parameter and the mechanical braking proportional parameter greater than 0 specifically includes: judging whether the brake air pressure is greater than 0 and smaller than the first air pressure threshold value or not, and generating a third air pressure judgment result; if the third air pressure judgment result is yes, the electronic braking proportion parameter is larger than the mechanical braking proportion parameter; if the third air pressure judgment result is negative, judging whether the brake air pressure is greater than the first air pressure threshold value and smaller than the second air pressure threshold value, and generating a fourth air pressure judgment result; if the fourth air pressure judgment result is yes, the electronic braking proportion parameter is smaller than the mechanical braking proportion parameter; wherein the first air pressure threshold is less than the second air pressure threshold.
In the technical scheme, because the second air pressure threshold is a boundary threshold of normal braking and severe braking, when the braking air pressure is greater than 0 and less than the second air pressure threshold, the automobile should be subjected to normal braking, and the method is mainly used for reducing the speed of the automobile or avoiding risks in advance. Ordinary braking is the braking mode that uses the most in the car driving, therefore ordinary braking adopts the hybrid braking mode, has obvious meaning to braking energy recovery.
Further, in order to refine the brake air pressure between 0 and the second air pressure threshold value to achieve an optimization of the hybrid braking effect, the first air pressure threshold value is set between the second air pressure threshold value and the first air pressure threshold value. Wherein the first air pressure threshold corresponds to a brake air pressure boundary between light and medium braking. When the brake air pressure is smaller than the first air pressure threshold value, the electronic brake proportion parameter is larger than the mechanical brake proportion parameter, and the automobile is mainly braked by the electronic brake device. When the brake air pressure is greater than the first air pressure threshold value and less than the second air pressure threshold value, the electronic brake proportion parameter is less than the mechanical brake proportion parameter, and the automobile is mainly braked through the mechanical brake device.
Further, the specific setting values of the first air pressure threshold value and the second air pressure threshold value can be adjusted according to the actual requirements of users and the actual conditions of the automobile, so that the actual braking requirements can be met.
Further, more air pressure thresholds can be set for the brake air pressure, so that the refinement of the hybrid braking is realized.
In the technical scheme, the first air pressure threshold is 0.4 MPa; the second gas pressure threshold is 0.8 mpa.
In the technical scheme, when the braking air pressure is between 0 MPa and 0.4 MPa, the braking mode mainly uses an electronic braking device for braking; when the braking air pressure is between 0.4 MPa and 0.8 MPa, the braking mode takes a mechanical braking device as a main part to brake; when the brake air pressure is more than 0.8 MPa, the brake mode is full mechanical brake.
In the above technical solution, according to the electric braking proportion parameter and the mechanical braking proportion parameter, the braking specifically includes: determining the braking force of the electronic braking device according to the electronic braking proportion parameter; and determining the braking force of the mechanical braking device according to the mechanical braking proportion parameter.
In the technical scheme, the braking force of the electronic braking device is determined through the electronic braking proportion parameter, and the braking force of the mechanical braking device is determined through the mechanical braking proportion parameter, so that the braking forces of different braking devices can be fully refined, and the optimal mixed braking effect is realized.
An embodiment of a second aspect of the invention provides a braking energy recovery system comprising: a brake pedal; the air source device is mechanically connected with the brake pedal, and the brake pedal can change the brake air pressure of the air source device; the air pressure sensor is used for detecting the stroke change of the brake pedal; the brake executing device comprises an electronic brake device, a mechanical brake device, a processor and a memory; the memory stores a computer program, and the processor is used for controlling the braking of the electronic braking device and the braking of the mechanical braking device when executing the computer program to realize the steps of any one of the automobile braking energy recovery control methods in the first aspect; and the braking energy recovery device is used for recovering energy in the braking process of the electronic braking device.
According to a second aspect of the present invention, a braking energy recovery system is provided, which includes a brake pedal, an air source device, and an air pressure sensor. The air source device is mechanically connected with the brake pedal, and the brake pedal can displace in the braking process so as to change the braking air pressure of the air source device. The air pressure sensor can detect the brake air pressure of the air source device. The processor of the brake actuator may control the electric brake device braking and the mechanical brake device braking. The braking energy recovery device can recover energy of the electronic braking device.
In addition, since the processor can execute the computer program or the instruction stored in the memory, and implement any of the automobile braking energy recovery control methods of the first aspect when executing the computer program or the instruction, the braking energy recovery system of the present invention has all the beneficial effects of the automobile braking energy recovery control method in any of the above technical solutions, and is not described herein again.
An embodiment of a third aspect of the invention provides an automobile comprising: a vehicle body; any one of the braking energy recovery systems of the second aspect is disposed on the vehicle body, and is used for recovering energy during braking of the vehicle body.
According to the third aspect of the invention, the automobile is provided, which comprises the automobile body and the braking energy recovery system. The braking energy recovery system is arranged on the vehicle body. The braking energy recovery system can recover energy in the braking process of the vehicle body.
In addition, the automobile comprises any one of the braking energy recovery systems in the embodiments of the second aspect, so that the beneficial effects of any one of the braking energy recovery systems in the embodiments of the second aspect are achieved, and the details are not repeated herein.
An embodiment of the fourth aspect of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of any one of the automobile braking energy recovery control methods described in the first aspect above.
According to an embodiment of the computer-readable storage medium of the present invention, a computer program is stored thereon, and when the computer program is executed by a processor, the steps of the method for controlling recovery of automobile braking energy in any of the above embodiments are implemented, so that all beneficial effects of the method for controlling recovery of automobile braking energy in any of the above embodiments are achieved, and details are not repeated herein.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 illustrates a flow diagram of a method for controlling recovery of braking energy of an automobile according to an embodiment of the invention;
FIG. 2 illustrates a flow diagram of a vehicle braking energy recovery control method according to an embodiment of the invention;
FIG. 3 illustrates a flow diagram of a method for controlling recovery of braking energy of an automobile according to an embodiment of the invention;
FIG. 4 shows a schematic structural diagram of an automobile according to an embodiment of the invention;
FIG. 5 shows a schematic structural diagram of an automobile according to an embodiment of the invention;
FIG. 6 shows a flow chart of a method for controlling recovery of braking energy of an automobile according to an embodiment of the invention.
Wherein, the correspondence between the reference numbers and the part names in fig. 4 to 6 is:
100: a braking energy recovery system; 102: a brake pedal; 104: an air supply device; 106: a barometric sensor (relay valve); 108: a brake actuator (master brake valve); 110: an electronic braking device; 112: a mechanical braking device; 114: a processor; 116: a memory; 118: a braking energy recovery device; 500: a brake chamber; 600: a brake anti-lock system controller; 800: a drive motor and a control device; 900: an automobile; 902: a vehicle body.
Detailed Description
In order that the above objects, features and advantages of the embodiments of the present invention can be more clearly understood, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, embodiments of the present invention may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited to the specific embodiments disclosed below.
Some embodiments according to the invention are described below with reference to fig. 1 to 6.
Example one
As shown in fig. 1, in an embodiment of the present invention, a method for controlling recovery of braking energy of an automobile is provided, including: step S102: obtaining brake air pressure; step S104: determining an electronic braking proportion parameter and a mechanical braking proportion parameter according to the braking air pressure; step S106: and respectively controlling the braking of the electronic braking device and the braking of the mechanical braking device according to the electronic braking proportion parameter and the mechanical braking proportion parameter.
The automobile braking energy recovering control method includes the first obtaining of braking air pressure. The electronic brake device and the mechanical brake device are arranged on the automobile body of the automobile, and both the electronic brake device and the mechanical brake device can brake the automobile body. When a driver steps on the pedal, the control device of the vehicle can determine the pedal stroke of the pedal according to the brake air pressure, and determine the electronic brake proportion parameter and the mechanical brake proportion parameter according to the obtained brake air pressure, so as to determine the hybrid brake with the optimal proportion, and can better recover the energy of the brake on the premise of ensuring the driving safety of the automobile. It should be noted that, the travel information of the brake pedal is determined by the brake air pressure, which does not affect the setting of the brake pedal or the moving position space, and the brake air pressure is easy to measure, the accuracy is high, and the measurement accuracy can be maintained even after long-time use, so that the travel information of different brake pedals can be accurately judged, no misjudgment can be caused, and further the braking of the electronic brake device and the mechanical brake device of the automobile can be accurately controlled.
Generally, a mechanical brake device brakes by a brake pad, and in this way, the kinetic energy of the automobile itself is converted into heat energy and finally dissipated. The electronic braking device brakes the automobile in an inversion mode, and the kinetic energy of the automobile can be converted into electric energy again to be stored, so that the energy recovery is realized. The mechanical brake device can realize quick emergency braking and is usually used for emergency, and under the condition, a driver usually steps the brake pedal to the bottom to realize maximum braking. In addition, the driver can often lightly step on the brake pedal to realize the speed reduction of the automobile. Therefore, the different braking intention of the driver is expressed as a difference in the stroke information of the brake pedal on which the brake pedal is depressed, and further as a difference in the brake air pressure. It can be understood that the mechanical brake proportion parameter and the electronic brake proportion parameter are controlled through the brake air pressure, and the electronic brake device and the mechanical brake device are further controlled to brake, so that reasonable and effective hybrid braking can be effectively carried out according to the brake intention of a driver.
Example two
As shown in fig. 2, in an embodiment of the present invention, a method for controlling recovery of braking energy of an automobile is provided, including:
step S202: judging whether the accelerator pedal stroke of the accelerator pedal is equal to 0, if so, executing the step S204, otherwise, continuing to execute the step S202;
step S204, judging whether the vehicle speed of the vehicle body is greater than 0, if so, executing step S206, otherwise, executing step S202;
step S206, obtaining brake air pressure;
step S208, judging whether the brake air pressure is 0, if so, executing step S210, otherwise, executing step S212;
step S210, setting an electronic braking proportion parameter as 1 and a mechanical braking proportion parameter as 0, and then executing step S218;
step S212, judging whether the brake air pressure is greater than a second air pressure threshold value, if so, executing step S214, otherwise, executing step S216;
step S214, setting the electronic brake proportion parameter to be 0 and the mechanical brake proportion parameter to be 1, and then executing step S218;
step S216, setting the electronic brake proportion parameter and the mechanical brake proportion parameter to be both larger than 0, and then executing step S218;
and step S218, controlling the braking of the electronic braking device and the braking of the mechanical braking device respectively according to the electronic braking proportion parameter and the mechanical braking proportion parameter.
The automobile braking energy recovering control method includes the first obtaining of braking air pressure. The electronic brake device and the mechanical brake device are arranged on the automobile body of the automobile, and both the electronic brake device and the mechanical brake device can brake the automobile body. When a driver steps on the pedal, the control device of the vehicle can determine the pedal stroke of the pedal according to the brake air pressure, and determine the electronic brake proportion parameter and the mechanical brake proportion parameter according to the obtained brake air pressure, so as to determine the hybrid brake with the optimal proportion, and can better recover the energy of the brake on the premise of ensuring the driving safety of the automobile. It should be noted that, the travel information of the brake pedal is determined by the brake air pressure, which does not affect the setting of the brake pedal or the moving position space, and the brake air pressure is easy to measure, the accuracy is high, and the measurement accuracy can be maintained even after long-time use, so that the travel information of different brake pedals can be accurately judged, no misjudgment can be caused, and further the braking of the electronic brake device and the mechanical brake device of the automobile can be accurately controlled.
Furthermore, the stroke information of the brake pedal is set to be in direct proportion to the brake air pressure, so that the stroke information of the brake pedal can be conveniently obtained through the brake air pressure. The brake air pressure threshold value can be conveniently set according to the travel information of the brake pedal, so that the refinement of the electronic brake proportion parameter and the mechanical brake proportion parameter is realized, and the optimal effect of the hybrid brake effect under different conditions is further realized.
Further, the automobile also comprises an accelerator pedal, and when the accelerator pedal is pressed, namely the travel of the accelerator pedal is larger than 0, the automobile body keeps running or accelerating. Obviously, when the travel of the accelerator pedal is greater than 0, the vehicle should not be braked.
Further, when the vehicle speed is equal to 0, the vehicle body is in a stationary state. It is apparent that the vehicle body does not need to be braked in this state.
Therefore, only when the travel of the accelerator pedal is judged to be 0 and the vehicle speed is greater than 0, the travel information of the brake pedal is acquired, so that the vehicle body is braked according to the travel information.
Further, when the accelerator pedal stroke is 0 and the vehicle speed is greater than 0, it indicates that the vehicle body is in a coasting state. For the state, the automobile is braked in a slow braking mode, and the corresponding optimal braking mode is pure electric braking, so that the automobile can be braked, and energy can be fully recovered. In this case, therefore, the proportional parameter for the electric brake is set to 1 and the proportional parameter for the mechanical brake is set to 0, in order to achieve a fully electric brake.
Further, when the brake air pressure is greater than a second air pressure threshold value, the mechanical brake proportion parameter is set to be 1, and the electronic brake proportion parameter is set to be 0, wherein the second air pressure threshold value corresponds to the travel information of the brake pedal with heavy braking. Obviously, the arrangement mode can realize a pure mechanical braking mode and can realize quick braking so as to ensure the driving safety of the automobile.
It should be noted that the sum of the electric braking proportion parameter and the mechanical braking proportion parameter is 1, and therefore it can be understood that the electric braking proportion parameter and the mechanical braking proportion parameter represent the proportion of the electric braking proportion parameter and the mechanical braking proportion parameter in the hybrid braking. The higher the ratio parameter, the higher the proportion of the braking method used in hybrid braking.
EXAMPLE III
As shown in fig. 3, in an embodiment of the present invention, a method for controlling recovery of braking energy of an automobile is provided, including:
step S302, judging whether the accelerator pedal stroke of an accelerator pedal is equal to 0, if so, executing step S304, otherwise, continuing to execute step S302;
step S304, judging whether the vehicle speed of the vehicle body is greater than 0, if so, executing step S306, otherwise, continuing to execute step S302;
step S306, obtaining brake air pressure;
step S308, judging whether the brake air pressure is 0, if so, executing step S310, otherwise, executing step S312;
step S310, setting an electronic braking proportion parameter as 1 and a mechanical braking proportion parameter as 0, and then executing step S326;
step S312, judging whether the brake air pressure is greater than a second air pressure threshold value, if so, executing step S314, otherwise, executing step S316;
step S314, setting the electronic braking proportion parameter as 0 and the mechanical braking proportion parameter as 1, and then executing step S326;
step S316: judging whether the brake air pressure is greater than 0 and smaller than a first air pressure threshold value, if so, executing a step S318, otherwise, executing a step S320;
step S318, setting the electronic braking proportion parameter to be larger than the mechanical braking proportion parameter, and then executing step S326;
step S320, judging whether the brake air pressure is greater than a first air pressure threshold value and smaller than a second air pressure threshold value; if yes, go to step S322, otherwise go to step S324;
step S322, setting the electronic braking proportion parameter to be smaller than the mechanical braking proportion parameter, and then executing step S326;
step S324, setting the electronic braking proportion parameter and the mechanical braking proportion parameter to be both greater than 0;
and step S326, respectively controlling the braking of the electronic braking device and the braking of the mechanical braking device according to the electronic braking proportion parameter and the mechanical braking proportion parameter.
The automobile braking energy recovering control method includes the first obtaining of braking air pressure. The brake pedal, the electronic brake device and the mechanical brake device are all arranged on the automobile body of the automobile, and the electronic brake device and the mechanical brake device can brake the automobile body. When a driver steps on the pedal, the control device of the vehicle can determine the pedal stroke of the pedal according to the brake air pressure, and determine the electronic brake proportion parameter and the mechanical brake proportion parameter according to the obtained brake air pressure, so as to determine the hybrid brake with the optimal proportion, and can better recover the energy of the brake on the premise of ensuring the driving safety of the automobile. It should be noted that, the travel information of the brake pedal is determined by the brake air pressure, which does not affect the setting of the brake pedal or the moving position space, and the brake air pressure is easy to measure, the accuracy is high, and the measurement accuracy can be maintained even after long-time use, so that the travel information of different brake pedals can be accurately judged, no misjudgment can be caused, and further the braking of the electronic brake device and the mechanical brake device of the automobile can be accurately controlled.
Further, the automobile also comprises an accelerator pedal, and when the accelerator pedal is pressed, namely the travel of the accelerator pedal is larger than 0, the automobile body keeps running or accelerating. Obviously, when the travel of the accelerator pedal is greater than 0, the vehicle should not be braked.
Further, when the vehicle speed is equal to 0, the vehicle body is in a stationary state. It is apparent that the vehicle body does not need to be braked in this state.
Therefore, only when the travel of the accelerator pedal is judged to be 0 and the vehicle speed is greater than 0, the travel information of the brake pedal is acquired, so that the vehicle body is braked according to the travel information.
Further, when the accelerator pedal stroke is 0 and the vehicle speed is greater than 0, it indicates that the vehicle body is in a coasting state. For the state, the automobile is braked in a slow braking mode, and the corresponding optimal braking mode is pure electric braking, so that the automobile can be braked, and energy can be fully recovered. In this case, therefore, the proportional parameter of the electric brake is set to 1, and the proportional parameter of the mechanical brake is set to 0, in order to implement the electric braking.
Further, when the brake air pressure is greater than a second air pressure threshold value, the mechanical brake proportion parameter is set to be 1, and the electronic brake proportion parameter is set to be 0, wherein the second air pressure threshold value corresponds to the travel information of the brake pedal with heavy braking. Obviously, the arrangement mode can realize a pure mechanical braking mode and can realize quick braking so as to ensure the driving safety of the automobile.
Further, since the second air pressure threshold is a boundary threshold of normal braking and heavy braking, when the brake air pressure is greater than 0 and less than the second air pressure threshold, the vehicle should be subjected to normal braking, that is, the vehicle is mainly used for reducing the speed of the vehicle or avoiding risks in advance. Ordinary braking is the braking mode that uses the most in the car driving, therefore ordinary braking adopts the hybrid braking mode, has obvious meaning to braking energy recovery.
Further, in order to refine the brake air pressure between 0 and the second air pressure threshold value to achieve an optimization of the hybrid braking effect, the first air pressure threshold value is set between the second air pressure threshold value and the first air pressure threshold value. Wherein the first air pressure threshold corresponds to a brake air pressure boundary between light and medium braking. When the brake air pressure is smaller than the first air pressure threshold value, the electronic brake proportion parameter is larger than the mechanical brake proportion parameter, and the automobile is mainly braked by the electronic brake device. When the brake air pressure is greater than the first air pressure threshold value and less than the second air pressure threshold value, the electronic brake proportion parameter is less than the mechanical brake proportion parameter, and the automobile is mainly braked through the mechanical brake device.
Preferably, the first gas pressure threshold is set at 0.4 mpa and the second gas pressure threshold is set at 0.8 mpa.
Further, the specific setting values of the first air pressure threshold value and the second air pressure threshold value can be adjusted according to the actual requirements of users and the actual conditions of the automobile, so that the actual braking requirements can be met.
Further, more air pressure thresholds can be set for the brake air pressure, so that the refinement of the hybrid braking is realized.
It should be noted that the sum of the electric braking proportion parameter and the mechanical braking proportion parameter is 1, and therefore it can be understood that the electric braking proportion parameter and the mechanical braking proportion parameter represent the proportion of the electric braking proportion parameter and the mechanical braking proportion parameter in the hybrid braking. The higher the ratio parameter, the higher the proportion of the braking method used in hybrid braking.
Example four
As shown in FIG. 4, in one embodiment of the present invention, an automobile 900 is provided that includes a body 902 and a braking energy recovery system 100. The braking energy recovery system 100 is provided on a vehicle body 902. The braking energy recovery system 100 can perform energy recovery during braking of the vehicle body 902.
In addition, the automobile 900 includes the braking energy recovery system 100 in the embodiment of the previous aspect, so that any one of the braking energy recovery systems 100 in the embodiment of the previous aspect has beneficial effects, and details are not repeated herein.
EXAMPLE five
As shown in fig. 6, in an embodiment of the present invention, there is provided a vehicle braking energy recovery control method for a vehicle, including: step S402: detecting whether the vehicle is in a sliding state; step S404: detecting whether the vehicle is in a braking state; step S406: identifying the braking intention of the driver; step S408: and distributing the electric and pneumatic braking force.
As shown in fig. 5, the automobile 900 in the embodiment includes: a brake pedal 102; the air source device (air reservoir) 104 is mechanically connected with the brake pedal 102, and the brake pedal 102 can change the brake air pressure of the air source device 104; the air pressure sensor 106 is used to detect a stroke change of the brake pedal 102; a brake execution device (also called a master brake valve) 108, a brake air chamber 500, a brake anti-lock system controller 600, a driving motor and control device 800, and a processor (vehicle control unit) 114; the processor 114 is used for implementing the steps of the automobile braking energy recovery control method in the embodiment of the above aspect when executing the computer program; a braking energy recovery device 118, wherein the braking energy recovery device 118 is used for recovering energy during the braking process of the electronic braking device 110.
As shown in fig. 6, it is detected whether the vehicle is in a coasting braking state, and it is determined from the pressure P of the brake pedal switch, the air pressure sensor, and the accelerator pedal stroke, and if the brake switch signal is off, the brake air pressure P is 0, the accelerator pedal displacement is 0, and the vehicle speed v >0m/s, the coasting energy recovery mode is entered.
Further, if the brake switch signal is on, the brake air pressure P is greater than 0, the displacement of the accelerator pedal is 0, and the vehicle speed v is greater than 0m/s, the brake energy recovery mode is entered.
Further, the driver's intention to brake is judged by a brake pedal brake switch, a travel of an accelerator pedal and an air pressure sensor, and the driver's intention to brake is judged by establishing a proportional relation between a pressure value p of air pressure sensor and a travel s of the brake pedal, wherein s is k × p, and the travel of the pedal is identified.
Further, the vehicle control unit compares the pressure signal of the air pressure sensor obtained by the vehicle control unit with an original vehicle pedal displacement-braking force curve without an air pressure braking energy recovery system to obtain the braking force actually required by the driver, and then adjusts the energy recovery, namely the magnitude of electric braking intervention, through the total braking force and the target vehicle deceleration.
EXAMPLE six
In an embodiment of the present invention, a computer-readable storage medium is provided, where a computer program is stored, and when the computer program is executed by a processor, the steps of the method for controlling recovery of automobile braking energy in any of the above embodiments are implemented, so that all beneficial effects of the method for controlling recovery of automobile braking energy in any of the above embodiments are achieved, and details are not repeated herein.
Through confirming the braking air pressure, can be more accurate the stroke information of different brake pedal of judgement, can not cause the erroneous judgement, and then accurate control car electronic brake device braking and mechanical brake device braking, under the prerequisite of guaranteeing safe in driving, realize the braking proportion of the different arresting gear of hybrid braking, effectual energy recuperation is carried out to the braking process.
In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. 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 description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means 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 do not necessarily 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.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An automobile braking energy recovery control method is used for an automobile, and is characterized by comprising the following steps: the automobile braking energy recovery control method comprises the following steps of:
obtaining brake air pressure;
determining an electronic braking proportion parameter and a mechanical braking proportion parameter according to the braking air pressure;
and respectively controlling the braking of the electronic braking device and the braking of the mechanical braking device according to the electronic braking proportion parameter and the mechanical braking proportion parameter.
2. The automobile braking energy recovery control method of claim 1, wherein the automobile further comprises: before the step of acquiring the braking air pressure, the automobile braking energy recovery control method further comprises the following steps:
judging whether the accelerator pedal stroke of the accelerator pedal is equal to 0 or not, and generating a first judgment result;
judging whether the vehicle speed of the vehicle body is greater than 0 or not, and generating a second judgment result;
and if the first judgment result is yes and the second judgment result is yes, the brake air pressure is obtained.
3. The vehicle braking energy recovery control method of claim 1, wherein the vehicle further comprises a brake pedal, and the travel information of the brake pedal is proportional to the brake air pressure.
4. The automobile braking energy recovery control method of claim 1, wherein the step of determining the electronic braking proportional parameter and the mechanical braking proportional parameter according to the braking air pressure specifically comprises:
judging whether the brake air pressure is 0 or not, and generating a first air pressure judgment result;
if the first air pressure judgment result is yes, the electronic braking proportion parameter is 1, and the mechanical braking proportion parameter is 0;
if the first air pressure judgment result is negative, judging whether the brake air pressure is larger than a second air pressure threshold value or not, and generating a second air pressure judgment result;
if the second air pressure judgment result is yes, the electronic braking proportion parameter is 0, and the mechanical braking proportion parameter is 1;
if the second air pressure judgment result is negative, the electronic braking proportion parameter and the mechanical braking proportion parameter are both greater than 0;
and the sum of the electronic braking proportion parameter and the mechanical braking proportion parameter is 1.
5. The automobile braking energy recovery control method according to claim 4, wherein if the second air pressure determination result is negative, the step of making both the electronic braking proportional parameter and the mechanical braking proportional parameter greater than 0 specifically includes:
judging whether the brake air pressure is greater than 0 and smaller than the first air pressure threshold value or not, and generating a third air pressure judgment result;
if the third air pressure judgment result is yes, the electronic braking proportion parameter is larger than the mechanical braking proportion parameter;
if the third air pressure judgment result is negative, judging whether the brake air pressure is greater than the first air pressure threshold value and smaller than the second air pressure threshold value, and generating a fourth air pressure judgment result;
if the fourth air pressure judgment result is yes, the electronic braking proportion parameter is smaller than the mechanical braking proportion parameter;
wherein the first air pressure threshold is less than the second air pressure threshold.
6. The automotive braking energy recovery control method of claim 5,
the first air pressure threshold is 0.4 megapascals;
the second gas pressure threshold is 0.8 megapascals.
7. The automobile braking energy recovery control method of claim 1, wherein the braking according to the electronic braking proportional parameter and the mechanical braking proportional parameter specifically comprises:
determining the braking force of the electronic braking device according to the electronic braking proportion parameter;
and determining the braking force of the mechanical braking device according to the mechanical braking proportion parameter.
8. A braking energy recovery system (100), comprising:
a brake pedal (102);
an air supply device (104) mechanically coupled to the brake pedal (102), the brake pedal (102) capable of varying a brake air pressure of the air supply device (104);
an air pressure sensor (106), said air pressure sensor (106) for detecting a brake air pressure of said air supply means (104);
a brake actuation device (108), the brake actuation device (108) comprising an electronic brake device (110), a mechanical brake device (112), a processor (114), and a memory (116); the memory (116) has a computer program stored therein, and the processor (114) is configured to control braking of the electronic braking device (110) and braking of the mechanical braking device (112) when executing the computer program to implement the steps of the method for controlling recovery of braking energy of a vehicle according to any one of claims 1 to 7;
the braking energy recovery device (118), the braking energy recovery device (118) is used for recovering energy for braking the electronic braking device (110).
9. An automobile (900), comprising:
a vehicle body (902);
the braking energy recovery system (100) of claim 8, disposed on the vehicle body (902) for energy recovery during braking of the vehicle body (902).
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method for controlling recovery of vehicle braking energy according to any one of claims 1 to 7.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1081005A2 (en) * | 1999-09-01 | 2001-03-07 | Denso Corporation | Vehicle braking apparatus and vehicle braking method |
| CN104827916A (en) * | 2014-12-19 | 2015-08-12 | 北汽福田汽车股份有限公司 | Braking energy feedback coefficient determination method and device |
| CN108656956A (en) * | 2017-03-27 | 2018-10-16 | 杭州长江汽车有限公司 | Electric vehicle brake method, system and electric vehicle |
| CN111038269A (en) * | 2019-12-13 | 2020-04-21 | 一汽解放汽车有限公司 | New energy braking energy recovery control system and method |
| CN111791714A (en) * | 2020-07-22 | 2020-10-20 | 摩登汽车有限公司 | Electric vehicle braking energy recovery control method |
-
2021
- 2021-01-15 CN CN202110057660.3A patent/CN112659908B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1081005A2 (en) * | 1999-09-01 | 2001-03-07 | Denso Corporation | Vehicle braking apparatus and vehicle braking method |
| CN104827916A (en) * | 2014-12-19 | 2015-08-12 | 北汽福田汽车股份有限公司 | Braking energy feedback coefficient determination method and device |
| CN108656956A (en) * | 2017-03-27 | 2018-10-16 | 杭州长江汽车有限公司 | Electric vehicle brake method, system and electric vehicle |
| CN111038269A (en) * | 2019-12-13 | 2020-04-21 | 一汽解放汽车有限公司 | New energy braking energy recovery control system and method |
| CN111791714A (en) * | 2020-07-22 | 2020-10-20 | 摩登汽车有限公司 | Electric vehicle braking energy recovery control method |
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