CN115366865B - Intelligent regulation and control system for electric vacuum pump of new energy automobile - Google Patents
Intelligent regulation and control system for electric vacuum pump of new energy automobile Download PDFInfo
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- CN115366865B CN115366865B CN202211111849.7A CN202211111849A CN115366865B CN 115366865 B CN115366865 B CN 115366865B CN 202211111849 A CN202211111849 A CN 202211111849A CN 115366865 B CN115366865 B CN 115366865B
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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
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
- B60T13/46—Vacuum systems
- B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/72—Electrical control in fluid-pressure brake systems in vacuum systems or vacuum booster units
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention discloses an intelligent regulation control system of an electric vacuum pump of a new energy automobile, which comprises an automobile internal machine liquid temperature detection module, an automobile internal machine liquid temperature analysis module, an automobile external oxygen concentration detection analysis module, an automobile vacuum pump pressure detection analysis module, an automobile vacuum pump vacuum degree analysis module, an automobile vacuum pump regulation analysis execution module and a data storage library. The pedal force of the new energy automobile corresponding to each brake is detected through the pressure sensor, the vacuum pump pressure and the vacuum degree of the new energy automobile corresponding to each brake are obtained through analysis, the limitation of the vacuum degree analysis in the booster corresponding to the new energy automobile in the prior art is broken, reliable data support is provided for the regulation and control of the electric vacuum pump of the subsequent new energy automobile, the regulation and control effect of the electric vacuum pump of the new energy automobile is enhanced to a great extent, and therefore the safety of the new energy automobile in the running process is effectively guaranteed.
Description
Technical Field
The invention relates to the technical field of intelligent regulation and control of an electric vacuum pump of a new energy automobile, in particular to an intelligent regulation and control system of an electric vacuum pump of a new energy automobile.
Background
Under the large environmental trends of energy conservation, emission reduction and environmental protection, the new energy automobile has a relatively wide development prospect, because the new energy automobile adopts motor drive, the vacuum assistance can not be improved for the braking of the new energy automobile, and the electric vacuum pump can ensure the safe operation of a new energy automobile braking system, thereby highlighting the importance of intelligent regulation and control of the electric vacuum pump of the new energy automobile.
At present, the change of the vacuum degree in the booster of the new energy automobile is mainly monitored, and then the electric vacuum pump of the new energy automobile is regulated and controlled, the monitoring dimension is too single, the accuracy of the analysis result is low, and the method is specifically embodied in the following aspects:
1. the temperature of the engine fluid in the new energy automobile and the external oxygen concentration cause certain influence on the regulation and control of the electric vacuum pump of the new energy automobile, when the regulation and control analysis is carried out on the electric vacuum pump corresponding to the new energy automobile, the monitoring on the temperature of the engine fluid in the new energy automobile and the external oxygen concentration is omitted, so that the regulation and control analysis result of the electric vacuum pump of the new energy automobile has one-sided performance, the representativeness of the analysis result is not strong, the regulation and control effectiveness and reliability of the electric vacuum pump of the new energy automobile cannot be guaranteed, and the influence on the braking performance of the new energy automobile is further caused.
2. The pedal force generated by the new energy automobile stepping on the brake in the driving process is closely related to the pressure of the vacuum pump, and meanwhile, the regulation and control result of the electric vacuum pump corresponding to the new energy automobile is influenced to a certain extent, the pedal force generated by the brake is ignored in the prior art, the reliability of the analysis result of the pressure of the electric vacuum pump of the new energy automobile cannot be improved, reliable data support cannot be provided for the regulation and control of the electric vacuum pump of the subsequent new energy automobile, the regulation and control effect of the electric vacuum pump is reduced, and the safety of the new energy automobile in the driving process cannot be effectively guaranteed.
Disclosure of Invention
In order to overcome the defects in the background technology, the embodiment of the invention provides an intelligent regulation control system for an electric vacuum pump of a new energy automobile, which can effectively solve the problems related to the background technology.
The aim of the invention can be achieved by the following technical scheme:
an intelligent regulation control system of an electric vacuum pump of a new energy automobile comprises:
the engine oil temperature detection module is used for detecting the temperatures of the transmission oil, the engine oil and the cooling tank cooling liquid in the corresponding braking of the new energy automobile to obtain the temperatures of the transmission oil, the engine oil and the cooling tank cooling liquid in the corresponding braking of the new energy automobile;
the automobile internal machine liquid temperature analysis module is used for analyzing the internal machine liquid temperature influence indexes of the new energy automobile corresponding to each brake and brake to obtain the internal machine liquid temperature influence indexes of the new energy automobile corresponding to each brake and brake;
the system comprises an automobile external oxygen concentration detection analysis module, a new energy automobile detection analysis module and a control module, wherein the automobile external oxygen concentration detection analysis module is used for detecting the external oxygen concentration of the new energy automobile corresponding to each brake by an oxygen concentration sensor to obtain the external oxygen concentration of the new energy automobile corresponding to each brake, and analyzing the external oxygen concentration influence index of the new energy automobile corresponding to each brake;
the automobile vacuum pump pressure detection analysis module is used for detecting pedal force of the new energy automobile corresponding to each brake by the pressure sensor to obtain pedal force of the new energy automobile corresponding to each brake, and analyzing the vacuum pump pressure of the new energy automobile corresponding to each brake to obtain the vacuum pump pressure of the new energy automobile corresponding to each brake;
the automobile vacuum pump vacuum degree analysis module is used for analyzing the vacuum degree of the new energy automobile corresponding to each brake and brake to obtain the vacuum degree of the new energy automobile corresponding to each brake and brake;
the automobile vacuum pump regulation and control analysis execution module is used for comprehensively analyzing the internal engine liquid temperature influence index, the external oxygen concentration influence index and the vacuum degree of the new energy automobile corresponding to each brake, obtaining the regulation and control coefficient of the new energy automobile corresponding to each brake, and carrying out corresponding regulation and control operation on the electric vacuum pump corresponding to the new energy automobile;
the data storage library is used for storing the thickness and the volume of the outer wall of the transmission, the thickness and the volume of the outer wall of the engine and the thickness and the volume of the outer wall of the cooling tank corresponding to the new energy automobile and storing the corresponding brake pedal lever ratio, booster efficiency, master cylinder efficiency and master cylinder diameter of the new energy automobile.
As a further improvement of the invention, the temperature of the speed changing engine oil, the engine oil and the cooling liquid of the cooling tank in the corresponding braking of the new energy automobile is detected by the following specific detection modes:
detecting points are evenly distributed on the outer wall of the transmission corresponding to the new energy automobile, detecting the temperatures of all the detecting points of the outer wall of the transmission corresponding to the new energy automobile through a temperature sensor, removing the maximum temperature and the minimum temperature from the temperatures, meanwhile, carrying out average value calculation on the temperatures of all the detecting points of the outer wall of the transmission to obtain the average temperature corresponding to the outer wall of the transmission, extracting the thickness and the volume of the outer wall of the transmission corresponding to the new energy automobile from a data storage library, further calculating the form influence index of the transmission corresponding to the new energy automobile, comparing the form influence index of the transmission corresponding to the new energy automobile with the internal and external temperature differences of the transmission corresponding to the set form influence indexes of various transmissions to obtain the internal and external temperature differences of the transmission corresponding to the new energy automobile, and carrying out difference between the average temperature of the outer wall of the transmission corresponding to the new energy automobile and the internal and external temperature differences of the transmission corresponding to the new energy automobile to obtain the transmission oil temperature corresponding to the new energy automobile, so that the transmission oil temperature of the transmission corresponding to the new energy automobile in various braking is obtained;
and analyzing and obtaining the engine oil temperature and the cooling tank cooling liquid temperature of the new energy automobile corresponding to each brake according to the analysis method that the transmission oil temperature is the same in each brake of the new energy automobile.
As a further improvement of the invention, the specific calculation formula of the form influence index of the transmission corresponding to the new energy automobile is as followsWherein sigma Speed variator Expressed as a corresponding transmission form influence index of the new energy automobile, e is expressed as a natural constant, H Speed variator 、H′ Speed variator 、ΔH Speed variator Respectively expressed as the thickness of the outer wall of the corresponding transmission of the new energy automobile, the thickness of the outer wall of the set reference transmission and the thickness difference of the outer wall of the set allowed transmission, V Speed variator 、V′ Speed variator 、ΔV Speed variator The volume of the corresponding speed changer of the new energy automobile, the set reference speed changer volume and the set allowable speed changer volume difference are respectively expressed as u 1 、u 2 The thickness of the outer wall of the transmission and the volume of the transmission are respectively expressed as set influencing factors corresponding to the thickness and the volume of the transmission.
As a further improvement of the invention, the internal engine fluid temperature influence indexes of the new energy automobile corresponding to each brake are analyzed, and the specific analysis mode is as follows:
according to the formulaCalculating the internal engine fluid temperature influence index phi of the new energy automobile corresponding to each brake i The internal machine liquid temperature influence index corresponding to the ith brake of the new energy automobile is expressed, i is expressed as the number of each brake, i=1, 2 i 、J i 、L i The temperature of the transmission oil, the temperature of engine oil and the temperature of cooling tank cooling liquid in the ith braking and braking corresponding to the new energy automobile are respectively expressed, B ', J ', L ' are respectively expressed as the set transmission oil temperature, the engine oil temperature and the cooling tank cooling liquid temperature, and DeltaB, deltaJ and DeltaL are respectively expressed as the set allowable transmission oil temperature difference, the allowable engine oil temperature difference and the allowable cooling tank cooling liquid temperature difference, a 1 、a 2 、a 3 The set transmission oil temperature, the engine oil temperature, and the cooling tank coolant temperature are indicated as the respective influence factors.
As a further improvement of the invention, the external oxygen concentration influence index of the new energy automobile corresponding to each brake is analyzed, and the specific analysis mode is as follows:
according to the formulaCalculating an external oxygen concentration influence index of the new energy automobile corresponding to each brake, wherein>The external oxygen concentration influence index corresponding to the ith brake of the new energy automobile is expressed as Y i The new energy automobile is indicated to correspond to the external oxygen concentration in the ith brake, Y' is indicated to be the set reference external oxygen concentration, and DeltaY is indicated to be the set allowable external oxygen concentration difference.
As a further improvement of the invention, the vacuum pump pressure of the new energy automobile corresponding to each brake is analyzed, and the specific analysis process is as follows:
the pedal force of the new energy automobile corresponding to each brake is recorded asF i ；
Extracting a brake pedal lever ratio, a booster lever ratio, booster efficiency, master cylinder efficiency and a master cylinder diameter corresponding to the new energy automobile from a data storage library;
according to the formulaCalculating the pressure intensity P of a vacuum pump corresponding to each brake of the new energy automobile i The vacuum pump pressure corresponding to the ith brake of the new energy automobile is represented as N Pedal plate 、N Power booster Respectively expressed as a brake pedal lever ratio and a booster lever ratio corresponding to the stored new energy automobile, R Power booster 、R Master cylinder The booster efficiency and the master cylinder efficiency corresponding to the stored new energy automobile are respectively expressed, D is expressed as a master cylinder diameter corresponding to the stored new energy automobile, and pi is expressed as a circumference ratio.
As a further improvement of the invention, the vacuum degree of the new energy automobile corresponding to each brake is analyzed, and the specific analysis mode is as follows:
according to the formulaCalculating the vacuum degree, lambda corresponding to each brake of the new energy automobile i The vacuum degree corresponding to the ith brake of the new energy automobile is shown, and P' is shown as the set standard atmospheric pressure.
As a further improvement of the invention, the comprehensive analysis is carried out on the internal engine fluid temperature influence index, the external oxygen concentration influence index and the vacuum degree of the new energy automobile corresponding to each brake, and the specific analysis mode is as follows:
according to the formulaCalculating the regulating and controlling coefficient, xi, of the new energy automobile corresponding to each brake i The regulation and control coefficients of the new energy automobile corresponding to each brake, phi' and ++>Lambda' is respectively expressed as a set allowable internal machine liquid temperature influence index, an allowable external oxygen concentration influence index and a reference vacuum degree, delta lambda is expressed as a set allowable vacuum degree difference value, b 1 、b 2 、b 3 Respectively expressed as an internal engine liquid temperature influence index, an external oxygen concentration influence index and a weight factor corresponding to the vacuum degree.
As a further improvement of the invention, the electric vacuum pump corresponding to the new energy automobile is correspondingly regulated and controlled, and the specific regulation and control modes are as follows:
matching the regulation and control coefficient of the new energy automobile corresponding to each brake with the regulation and control grade corresponding to the set various regulation and control coefficients to obtain the regulation and control grade of the new energy automobile corresponding to each brake;
and matching the regulation and control grade of the new energy automobile corresponding to each brake and the vacuum pump regulation and control value corresponding to each set regulation and control grade to obtain the vacuum pump regulation and control value of the new energy automobile corresponding to each brake and control, and further regulating and controlling the electric vacuum pump of the new energy automobile based on the vacuum pump regulation and control value of the new energy automobile corresponding to each brake and control.
Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects:
1. according to the invention, the temperature sensor is used for detecting the temperatures of the outer wall of the speed changer, the outer wall of the engine and the outer wall of the cooling tank in the process of corresponding braking of the new energy automobile, and analyzing the form influence index of the speed changer, the form influence index of the engine and the form influence index of the cooling tank, so that the speed change engine oil temperature, the engine oil temperature and the cooling liquid temperature of the cooling tank in the process of corresponding braking of the new energy automobile are comprehensively obtained, and from one aspect, the defect of detecting the internal engine liquid temperature of the new energy automobile in the prior art is overcome, the problem that the regulation and control analysis result of the electric vacuum pump of the new energy automobile is unilateral is effectively solved, and the scientific basis and the representativeness of the regulation and control analysis result of the electric vacuum pump of the new energy automobile are greatly improved; from another aspect, the effectiveness and reliability of the regulation and control of the electric vacuum pump of the new energy automobile are effectively guaranteed, the braking performance of the new energy automobile is further enhanced, and the occurrence of the fault of the braking system of the new energy automobile is greatly reduced.
2. According to the invention, the pedal force of the new energy automobile corresponding to each brake is detected through the pressure sensor, the vacuum pump pressure of the new energy automobile corresponding to each brake is obtained through calculation, and meanwhile, the vacuum degree of the new energy automobile corresponding to each brake is analyzed, so that the limitation of the vacuum degree analysis in the booster corresponding to the new energy automobile in the prior art is broken, reliable data support is provided for the regulation and control of the electric vacuum pump of the subsequent new energy automobile, the regulation and control effect of the electric vacuum pump of the new energy automobile is enhanced to a great extent, and the safety of the new energy automobile in the running process is effectively ensured.
3. According to the invention, the regulation and control coefficients of the new energy automobile corresponding to each brake and control value of the vacuum pump corresponding to each brake and control of the new energy automobile are analyzed, so that corresponding regulation and control operation is carried out on the electric vacuum pump corresponding to the new energy automobile, multidimensional analysis of regulation and control of the electric vacuum pump of the new energy automobile is realized, reliability and accuracy of the regulation and control value of the electric vacuum pump are ensured, stability of the vacuum degree of the booster of the new energy automobile is ensured to a certain extent, driving safety of the new energy automobile is greatly improved, and stability and effectiveness of the braking force of the new energy automobile are also ensured.
Drawings
The invention will be further described with reference to the accompanying drawings, in which embodiments do not constitute any limitation of the invention, and other drawings can be obtained by one of ordinary skill in the art without inventive effort from the following drawings.
FIG. 1 is a schematic diagram of the system module connection of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the invention provides an intelligent regulation and control system for an electric vacuum pump of a new energy automobile, which comprises an automobile internal machine liquid temperature detection module, an automobile internal machine liquid temperature analysis module, an automobile external oxygen concentration detection and analysis module, an automobile vacuum pump pressure detection and analysis module, an automobile vacuum pump vacuum degree analysis module, an automobile vacuum pump regulation and control analysis execution module and a data storage library.
The automobile internal machine liquid temperature detection module is connected with the automobile internal machine liquid temperature analysis module, the automobile external oxygen concentration detection analysis module is connected with the automobile vacuum pump regulation and control analysis execution module, the automobile vacuum pump pressure intensity detection analysis module is connected with the automobile vacuum pump vacuum degree analysis module, the automobile vacuum pump regulation and control analysis execution module is respectively connected with the automobile internal machine liquid temperature analysis module and the automobile vacuum pump vacuum degree analysis module, and the data storage library is respectively connected with the automobile internal machine liquid temperature analysis module and the automobile vacuum pump pressure intensity detection analysis module.
And the engine oil temperature detection module is used for detecting the temperatures of the transmission oil, the engine oil and the cooling tank cooling liquid in the corresponding braking of the new energy automobile to obtain the temperatures of the transmission oil, the engine oil and the cooling tank cooling liquid in the corresponding braking of the new energy automobile.
As a further improvement of the invention, the temperature of the speed changing engine oil, the engine oil and the cooling liquid of the cooling tank in the corresponding braking of the new energy automobile is detected by the following specific detection modes:
detecting points are evenly distributed on the outer wall of the transmission corresponding to the new energy automobile, detecting the temperatures of all the detecting points of the outer wall of the transmission corresponding to the new energy automobile through a temperature sensor, removing the maximum temperature and the minimum temperature from the temperatures, meanwhile, carrying out average value calculation on the temperatures of all the detecting points of the outer wall of the transmission to obtain the average temperature corresponding to the outer wall of the transmission, extracting the thickness and the volume of the outer wall of the transmission corresponding to the new energy automobile from a data storage library, further calculating the form influence index of the transmission corresponding to the new energy automobile, comparing the form influence index of the transmission corresponding to the new energy automobile with the internal and external temperature differences of the transmission corresponding to the set form influence indexes of various transmissions to obtain the internal and external temperature differences of the transmission corresponding to the new energy automobile, and carrying out difference between the average temperature of the outer wall of the transmission corresponding to the new energy automobile and the internal and external temperature differences of the transmission corresponding to the new energy automobile to obtain the transmission oil temperature corresponding to the new energy automobile, so that the transmission oil temperature of the transmission corresponding to the new energy automobile in various braking is obtained;
the specific calculation formula of the transmission form influence index corresponding to the new energy automobile is as followsσ Speed variator Expressed as a form influence index of a transmission corresponding to the new energy automobile, H Speed variator 、H′ Speed variator 、ΔH Speed variator Respectively expressed as the thickness of the outer wall of the corresponding transmission of the new energy automobile, the thickness of the outer wall of the set reference transmission and the thickness difference of the outer wall of the set allowed transmission, V Speed variator 、V′ Speed variator 、ΔV Speed variator The volume of the corresponding speed changer of the new energy automobile, the set reference speed changer volume and the set allowable speed changer volume difference are respectively expressed as u 1 、u 2 The thickness of the outer wall of the transmission and the volume of the transmission are respectively expressed as set influencing factors corresponding to the thickness and the volume of the transmission.
In a specific embodiment, detecting points are uniformly distributed on the outer wall of the engine corresponding to the new energy automobile, detecting the temperatures of all the detecting points of the outer wall of the engine corresponding to the new energy automobile through a temperature sensor, removing the maximum temperature and the minimum temperature from the detected temperatures, simultaneously calculating the average value of the temperatures of all the detecting points of the outer wall of the engine to obtain the average temperature corresponding to the outer wall of the engine, and simultaneously extracting the thickness and the volume of the outer wall of the engine corresponding to the new energy automobile from a data storage libraryRespectively marked as H Engine with a motor 、V Engine with a motor Further according to the formulaCalculating the engine form influence index and sigma corresponding to the new energy automobile Engine with a motor Expressed as an engine form influence index corresponding to the new energy automobile, H' Engine with a motor 、ΔH Engine with a motor Respectively expressed as a set reference engine outer wall thickness, an allowable engine outer thickness difference, V' Engine with a motor 、ΔV Engine with a motor Respectively expressed as a set reference engine volume, allowable engine area difference, u 3 、u 4 The influence factors are respectively expressed as the thickness of the outer wall of the engine and the corresponding influence factors of the volume of the engine;
and comparing the engine form influence index corresponding to the new energy automobile with the internal and external temperature differences corresponding to the set various engine form influence indexes to obtain the internal and external temperature differences of the engine corresponding to the new energy automobile, and performing difference operation on the average temperature of the external wall of the engine corresponding to the new energy automobile and the internal and external temperature differences of the engine corresponding to the new energy automobile to obtain the engine oil temperature corresponding to the new energy automobile, thereby obtaining the engine oil temperature corresponding to each braking of the new energy automobile.
In a specific embodiment, detecting points are uniformly distributed on the outer wall of the cooling tank corresponding to the new energy automobile, detecting the temperatures of each detecting point of the outer wall of the cooling tank corresponding to the new energy automobile through a temperature sensor, removing the maximum temperature and the minimum temperature from the detected temperatures, simultaneously calculating the average value of the temperatures of each detecting point of the outer wall of the cooling tank to obtain the average temperature corresponding to the outer wall of the cooling tank, and simultaneously extracting the thickness and the volume of the outer wall of the cooling tank corresponding to the new energy automobile from a data storage library, which are respectively marked as H Engine with a motor 、V Engine with a motor Further according to the formulaCalculating the form influence index sigma of the cooling tank corresponding to the new energy automobile Cooling tank Is expressed as a cooling tank shape corresponding to a new energy automobileState impact index, H' Cooling tank 、ΔH Cooling tank Respectively expressed as the set reference cooling tank outer wall thickness, the allowable cooling tank outer thickness difference, V' Cooling tank 、ΔV Cooling tank Respectively expressed as a set reference cooling tank volume, allowable cooling tank volume difference, u 5 、u 6 The thickness of the outer wall of the cooling tank and the volume of the cooling tank are respectively expressed as corresponding influence factors;
and comparing the cooling tank form influence index corresponding to the new energy automobile with the cooling tank internal and external temperature differences corresponding to the set various cooling tank form influence indexes to obtain the cooling tank internal and external temperature difference corresponding to the new energy automobile, and performing difference between the average temperature of the outer wall of the cooling tank corresponding to the new energy automobile and the cooling tank internal and external temperature difference corresponding to the new energy automobile to obtain the cooling tank cooling liquid temperature corresponding to the new energy automobile, thereby obtaining the cooling tank cooling liquid temperature corresponding to each brake of the new energy automobile.
According to the invention, the temperature sensor is used for detecting the temperatures of the outer wall of the speed changer, the outer wall of the engine and the outer wall of the cooling tank in the process of corresponding braking of the new energy automobile, and analyzing the form influence index of the speed changer, the form influence index of the engine and the form influence index of the cooling tank, so that the speed change engine oil temperature, the engine oil temperature and the cooling liquid temperature of the cooling tank in the process of corresponding braking of the new energy automobile are comprehensively analyzed, and from one aspect, the defect of detecting the internal engine liquid temperature of the new energy automobile in the current technology is overcome, the problem that the control analysis result of the electric vacuum pump of the new energy automobile has one-sided performance is effectively solved, and the scientific basis and the representativeness of the control analysis result of the electric vacuum pump of the new energy automobile are greatly improved; from another aspect, the effectiveness and reliability of the regulation and control of the electric vacuum pump of the new energy automobile are effectively guaranteed, the braking performance of the new energy automobile is further enhanced, and the occurrence of the fault of the braking system of the new energy automobile is greatly reduced.
And the automobile internal machine liquid temperature analysis module is used for analyzing the internal machine liquid temperature influence indexes of the new energy automobile corresponding to each brake and brake to obtain the internal machine liquid temperature influence indexes of the new energy automobile corresponding to each brake and brake.
As a further improvement of the invention, the internal engine fluid temperature influence indexes of the new energy automobile corresponding to each brake are analyzed, and the specific analysis mode is as follows:
according to the formulaCalculating the internal engine fluid temperature influence index phi of the new energy automobile corresponding to each brake i The internal machine liquid temperature influence index corresponding to the ith brake of the new energy automobile is expressed, i is expressed as the number of each brake, i=1, 2 i 、J i 、L i The temperature of the transmission oil, the temperature of engine oil and the temperature of cooling tank cooling liquid in the ith braking and braking corresponding to the new energy automobile are respectively expressed, B ', J ', L ' are respectively expressed as the set transmission oil temperature, the engine oil temperature and the cooling tank cooling liquid temperature, and DeltaB, deltaJ and DeltaL are respectively expressed as the set allowable transmission oil temperature difference, the allowable engine oil temperature difference and the allowable cooling tank cooling liquid temperature difference, a 1 、a 2 、a 3 The set transmission oil temperature, the engine oil temperature, and the cooling tank coolant temperature are indicated as the respective influence factors.
The automobile external oxygen concentration detection analysis module is used for detecting the external oxygen concentration of the new energy automobile corresponding to each brake by the oxygen concentration sensor, obtaining the external oxygen concentration of the new energy automobile corresponding to each brake, and analyzing the external oxygen concentration influence index of the new energy automobile corresponding to each brake.
As a further improvement of the invention, the external oxygen concentration influence index of the new energy automobile corresponding to each brake is analyzed, and the specific analysis mode is as follows:
according to the formulaCalculating the correspondence of the new energy automobileExternal oxygen concentration influence index of each brake>The external oxygen concentration influence index corresponding to the ith brake of the new energy automobile is expressed as Y i The new energy automobile is indicated to correspond to the external oxygen concentration in the ith brake, Y' is indicated to be the set reference external oxygen concentration, and DeltaY is indicated to be the set allowable external oxygen concentration difference.
The automobile vacuum pump pressure detection analysis module is used for detecting pedal force of the new energy automobile corresponding to each brake by the pressure sensor to obtain pedal force of the new energy automobile corresponding to each brake, and analyzing the vacuum pump pressure of the new energy automobile corresponding to each brake to obtain the vacuum pump pressure of the new energy automobile corresponding to each brake.
As a further improvement of the invention, the vacuum pump pressure of the new energy automobile corresponding to each brake is analyzed, and the specific analysis process is as follows:
the pedal force of the new energy automobile corresponding to each brake is recorded as F i ；
Extracting a brake pedal lever ratio, a booster lever ratio, booster efficiency, master cylinder efficiency and a master cylinder diameter corresponding to the new energy automobile from a data storage library;
according to the formulaCalculating the pressure intensity P of a vacuum pump corresponding to each brake of the new energy automobile i The vacuum pump pressure corresponding to the ith brake of the new energy automobile is represented as N Pedal plate 、N Power booster Respectively expressed as a brake pedal lever ratio and a booster lever ratio corresponding to the stored new energy automobile, R Power booster 、R Master cylinder The booster efficiency and the master cylinder efficiency corresponding to the stored new energy automobile are respectively expressed, D is expressed as a master cylinder diameter corresponding to the stored new energy automobile, and pi is expressed as a circumference ratio.
In a specific embodiment, the pedal force of the new energy automobile corresponding to each brake is detected through the pressure sensor, the vacuum pump pressure of the new energy automobile corresponding to each brake is obtained through calculation, and meanwhile, the vacuum degree of the new energy automobile corresponding to each brake is analyzed, so that the limitation of the vacuum degree analysis in the booster corresponding to the new energy automobile in the prior art is broken, reliable data support is provided for the regulation and control of the electric vacuum pump of the subsequent new energy automobile, the regulation and control effect of the electric vacuum pump of the new energy automobile is enhanced to a great extent, and the safety of the new energy automobile in the running process is effectively ensured.
And the automobile vacuum pump vacuum degree analysis module is used for analyzing the vacuum degree of the new energy automobile corresponding to each brake and brake to obtain the vacuum degree of the new energy automobile corresponding to each brake and brake.
As a further improvement of the invention, the vacuum degree of the new energy automobile corresponding to each brake is analyzed, and the specific analysis mode is as follows:
according to the formulaCalculating the vacuum degree, lambda corresponding to each brake of the new energy automobile i The vacuum degree corresponding to the ith brake of the new energy automobile is shown, and P' is shown as the set standard atmospheric pressure.
And the automobile vacuum pump regulation and control analysis execution module is used for comprehensively analyzing the internal engine liquid temperature influence index, the external oxygen concentration influence index and the vacuum degree of the new energy automobile corresponding to each brake, obtaining the regulation and control coefficient of the new energy automobile corresponding to each brake, and carrying out corresponding regulation and control operation on the electric vacuum pump corresponding to the new energy automobile.
As a further improvement of the invention, the comprehensive analysis is carried out on the internal engine fluid temperature influence index, the external oxygen concentration influence index and the vacuum degree of the new energy automobile corresponding to each brake, and the specific analysis mode is as follows:
according to the formulaCalculating the regulating and controlling coefficient, xi, of the new energy automobile corresponding to each brake i The regulation and control coefficients of the new energy automobile corresponding to each brake, phi' and ++>Lambda' is respectively expressed as a set allowable internal machine liquid temperature influence index, an allowable external oxygen concentration influence index and a reference vacuum degree, delta lambda is expressed as a set allowable vacuum degree difference value, b 1 、b 2 、b 3 Respectively expressed as an internal engine liquid temperature influence index, an external oxygen concentration influence index and a weight factor corresponding to the vacuum degree.
As a further improvement of the invention, the electric vacuum pump corresponding to the new energy automobile is correspondingly regulated and controlled, and the specific regulation and control modes are as follows:
matching the regulation and control coefficient of the new energy automobile corresponding to each brake with the regulation and control grade corresponding to the set various regulation and control coefficients to obtain the regulation and control grade of the new energy automobile corresponding to each brake;
and matching the regulation and control grade of the new energy automobile corresponding to each brake and the vacuum pump regulation and control value corresponding to each set regulation and control grade to obtain the vacuum pump regulation and control value of the new energy automobile corresponding to each brake and control, and further regulating and controlling the electric vacuum pump of the new energy automobile based on the vacuum pump regulation and control value of the new energy automobile corresponding to each brake and control.
In a specific embodiment, the control coefficient of the new energy automobile corresponding to each brake is analyzed, the control value of the vacuum pump of the new energy automobile corresponding to each brake is analyzed, and then the corresponding control operation is carried out on the electric vacuum pump corresponding to the new energy automobile, so that the multidimensional analysis of the control of the electric vacuum pump of the new energy automobile is realized, the reliability and the accuracy of the control value of the electric vacuum pump are ensured, the stability of the vacuum degree of the booster of the new energy automobile is ensured to a certain extent, the driving safety of the new energy automobile is greatly improved, and the stability and the effectiveness of the braking force of the new energy automobile are also ensured.
The data storage library is used for storing the thickness and the volume of the outer wall of the transmission, the thickness and the volume of the outer wall of the engine and the thickness and the volume of the outer wall of the cooling tank corresponding to the new energy automobile and storing the corresponding brake pedal lever ratio, booster efficiency, master cylinder efficiency and master cylinder diameter of the new energy automobile.
The foregoing is merely illustrative of the structures of this invention and various modifications, additions and substitutions for those skilled in the art can be made to the described embodiments without departing from the scope of the invention or from the scope of the invention as defined in the accompanying claims.
Claims (9)
1. An intelligent regulation control system of an electric vacuum pump of a new energy automobile is characterized by comprising:
the engine oil temperature detection module is used for detecting the temperatures of the transmission oil, the engine oil and the cooling tank cooling liquid in the corresponding braking of the new energy automobile to obtain the temperatures of the transmission oil, the engine oil and the cooling tank cooling liquid in the corresponding braking of the new energy automobile;
the automobile internal machine liquid temperature analysis module is used for analyzing the internal machine liquid temperature influence indexes of the new energy automobile corresponding to each brake and brake to obtain the internal machine liquid temperature influence indexes of the new energy automobile corresponding to each brake and brake;
the system comprises an automobile external oxygen concentration detection analysis module, a new energy automobile detection analysis module and a control module, wherein the automobile external oxygen concentration detection analysis module is used for detecting the external oxygen concentration of the new energy automobile corresponding to each brake by an oxygen concentration sensor to obtain the external oxygen concentration of the new energy automobile corresponding to each brake, and analyzing the external oxygen concentration influence index of the new energy automobile corresponding to each brake;
the automobile vacuum pump pressure detection analysis module is used for detecting pedal force of the new energy automobile corresponding to each brake by the pressure sensor to obtain pedal force of the new energy automobile corresponding to each brake, and analyzing the vacuum pump pressure of the new energy automobile corresponding to each brake to obtain the vacuum pump pressure of the new energy automobile corresponding to each brake;
the automobile vacuum pump vacuum degree analysis module is used for analyzing the vacuum degree of the new energy automobile corresponding to each brake and brake to obtain the vacuum degree of the new energy automobile corresponding to each brake and brake;
the automobile vacuum pump regulation and control analysis execution module is used for comprehensively analyzing the internal engine liquid temperature influence index, the external oxygen concentration influence index and the vacuum degree of the new energy automobile corresponding to each brake, obtaining the regulation and control coefficient of the new energy automobile corresponding to each brake, and carrying out corresponding regulation and control operation on the electric vacuum pump corresponding to the new energy automobile;
the data storage library is used for storing the thickness and the volume of the outer wall of the transmission, the thickness and the volume of the outer wall of the engine and the thickness and the volume of the outer wall of the cooling tank corresponding to the new energy automobile and storing the corresponding brake pedal lever ratio, booster efficiency, master cylinder efficiency and master cylinder diameter of the new energy automobile.
2. The intelligent regulation control system of the electric vacuum pump of the new energy automobile according to claim 1, wherein the intelligent regulation control system is characterized in that: the temperature of the speed change engine oil, the engine oil and the cooling tank coolant in the corresponding braking of the new energy automobile is detected, and the specific detection mode is as follows:
detecting points are evenly distributed on the outer wall of the transmission corresponding to the new energy automobile, detecting the temperatures of all the detecting points of the outer wall of the transmission corresponding to the new energy automobile through a temperature sensor, removing the maximum temperature and the minimum temperature from the temperatures, meanwhile, carrying out average value calculation on the temperatures of all the detecting points of the outer wall of the transmission to obtain the average temperature corresponding to the outer wall of the transmission, extracting the thickness and the volume of the outer wall of the transmission corresponding to the new energy automobile from a data storage library, further calculating the form influence index of the transmission corresponding to the new energy automobile, comparing the form influence index of the transmission corresponding to the new energy automobile with the internal and external temperature differences of the transmission corresponding to the set form influence indexes of various transmissions to obtain the internal and external temperature differences of the transmission corresponding to the new energy automobile, and carrying out difference between the average temperature of the outer wall of the transmission corresponding to the new energy automobile and the internal and external temperature differences of the transmission corresponding to the new energy automobile to obtain the transmission oil temperature corresponding to the new energy automobile, so that the transmission oil temperature of the transmission corresponding to the new energy automobile in various braking is obtained;
and analyzing and obtaining the engine oil temperature and the cooling tank cooling liquid temperature of the new energy automobile corresponding to each brake according to the analysis method that the transmission oil temperature is the same in each brake of the new energy automobile.
3. The intelligent regulation control system of the electric vacuum pump of the new energy automobile according to claim 2, wherein: the specific calculation formula of the form influence index of the speed changer corresponding to the new energy automobile is as followsWherein sigma Speed variator Expressed as a corresponding transmission form influence index of the new energy automobile, e is expressed as a natural constant, H Speed variator 、H′ Speed variator 、ΔH Speed variator Respectively expressed as the thickness of the outer wall of the corresponding transmission of the new energy automobile, the thickness of the outer wall of the set reference transmission and the thickness difference of the outer wall of the set allowed transmission, V Speed variator 、V′ Speed variator 、ΔV Speed variator The volume of the corresponding speed changer of the new energy automobile, the set reference speed changer volume and the set allowable speed changer volume difference are respectively expressed as u 1 、u 2 The thickness of the outer wall of the transmission and the volume of the transmission are respectively expressed as set influencing factors corresponding to the thickness and the volume of the transmission.
4. The intelligent regulation control system of the electric vacuum pump of the new energy automobile according to claim 1, wherein the intelligent regulation control system is characterized in that: the analysis is carried out on the temperature influence index of the internal machine liquid corresponding to each brake of the new energy automobile, and the specific analysis mode is as follows:
according to the formulaCalculating the internal engine fluid temperature influence index phi of the new energy automobile corresponding to each brake i The internal machine liquid temperature influence index corresponding to the ith brake of the new energy automobile is expressed, i is expressed as the number of each brake, i=1, 2 i 、J i 、L i The temperature of the transmission oil, the temperature of engine oil and the temperature of cooling tank cooling liquid in the ith braking and braking corresponding to the new energy automobile are respectively expressed, B ', J ', L ' are respectively expressed as the set transmission oil temperature, the engine oil temperature and the cooling tank cooling liquid temperature, and DeltaB, deltaJ and DeltaL are respectively expressed as the set allowable transmission oil temperature difference, the allowable engine oil temperature difference and the allowable cooling tank cooling liquid temperature difference, a 1 、a 2 、a 3 The set transmission oil temperature, the engine oil temperature, and the cooling tank coolant temperature are indicated as the respective influence factors.
5. The intelligent regulation and control system for the electric vacuum pump of the new energy automobile according to claim 4, wherein the intelligent regulation and control system is characterized in that: the analysis of the external oxygen concentration influence index of the new energy automobile corresponding to each brake is carried out in the following specific analysis mode:
according to the formulaCalculating an external oxygen concentration influence index of the new energy automobile corresponding to each brake, wherein>The external oxygen concentration influence index corresponding to the ith brake of the new energy automobile is expressed as Y i The new energy automobile is indicated to correspond to the external oxygen concentration in the ith brake, Y' is indicated to be the set reference external oxygen concentration, and DeltaY is indicated to be the set allowable external oxygen concentration difference.
6. The intelligent regulation and control system for the electric vacuum pump of the new energy automobile according to claim 5, wherein the intelligent regulation and control system is characterized in that: the vacuum pump pressure of the new energy automobile corresponding to each brake is analyzed, and the specific analysis process is as follows:
the pedal force of the new energy automobile corresponding to each brake is recorded as F i ；
Extracting a brake pedal lever ratio, a booster lever ratio, booster efficiency, master cylinder efficiency and a master cylinder diameter corresponding to the new energy automobile from a data storage library;
according to the formulaCalculating the pressure intensity P of a vacuum pump corresponding to each brake of the new energy automobile i The vacuum pump pressure corresponding to the ith brake of the new energy automobile is represented as N Pedal plate 、N Power booster Respectively expressed as a brake pedal lever ratio and a booster lever ratio corresponding to the stored new energy automobile, R Power booster 、R Master cylinder The booster efficiency and the master cylinder efficiency corresponding to the stored new energy automobile are respectively expressed, D is expressed as a master cylinder diameter corresponding to the stored new energy automobile, and pi is expressed as a circumference ratio.
7. The intelligent regulation control system of the electric vacuum pump of the new energy automobile according to claim 6, wherein the intelligent regulation control system is characterized in that: the vacuum degree of the new energy automobile corresponding to each brake is analyzed, and the specific analysis mode is as follows:
according to the formulaCalculating the vacuum degree, lambda corresponding to each brake of the new energy automobile i The vacuum degree corresponding to the ith brake of the new energy automobile is shown, and P' is shown as the set standard atmospheric pressure.
8. The intelligent regulation control system of the electric vacuum pump of the new energy automobile according to claim 7, wherein the intelligent regulation control system is characterized in that: the method is characterized in that the internal engine fluid temperature influence index, the external oxygen concentration influence index and the vacuum degree of the new energy automobile corresponding to each brake are comprehensively analyzed, and the specific analysis modes are as follows:
according to the formulaCalculating the regulating and controlling coefficient, xi, of the new energy automobile corresponding to each brake i The regulation and control coefficients of the new energy automobile corresponding to each brake, phi' and ++>Lambda' is respectively expressed as a set allowable internal machine liquid temperature influence index, an allowable external oxygen concentration influence index and a reference vacuum degree, delta lambda is expressed as a set allowable vacuum degree difference value, b 1 、b 2 、b 3 Respectively expressed as an internal engine liquid temperature influence index, an external oxygen concentration influence index and a weight factor corresponding to the vacuum degree.
9. The intelligent regulation control system of the electric vacuum pump of the new energy automobile according to claim 1, wherein the intelligent regulation control system is characterized in that: the electric vacuum pump corresponding to the new energy automobile is correspondingly regulated and controlled, and the specific regulation and control modes are as follows:
matching the regulation and control coefficient of the new energy automobile corresponding to each brake with the regulation and control grade corresponding to the set various regulation and control coefficients to obtain the regulation and control grade of the new energy automobile corresponding to each brake;
and matching the regulation and control grade of the new energy automobile corresponding to each brake and the vacuum pump regulation and control value corresponding to each set regulation and control grade to obtain the vacuum pump regulation and control value of the new energy automobile corresponding to each brake and control, and further regulating and controlling the electric vacuum pump of the new energy automobile based on the vacuum pump regulation and control value of the new energy automobile corresponding to each brake and control.
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| KR20050120989A (en) * | 2004-06-21 | 2005-12-26 | 현대자동차주식회사 | A brake system for hybrid electric car |
| CN207173580U (en) * | 2017-08-01 | 2018-04-03 | 风度（常州）汽车研发院有限公司 | A kind of vacuum boost system and electric automobile |
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