Oil pressure self-checking analysis system applied to automobile brake system

Abstract

The application discloses an oil pressure self-checking and analyzing system applied to a brake system of an automobile and relates to the technical field of brake oil pressure detection, solves the technical problem that the brake oil pressure cannot be subjected to performance detection and the brake oil cannot be subjected to supply efficiency evaluation and detection according to data collection and analysis in the prior art, specifically, brake oil pressure performance of the automobile is analyzed, whether the current brake oil pressure meets actual requirements is inferred according to real-time brake oil pressure supply analysis, self-checking is facilitated when the brake system normally operates, the oil pressure supply stability of the brake system is ensured, the braking efficiency of the brake system is ensured, and the safety performance of automobile operation is improved; the automobile is also subjected to brake execution rechecking, brake oil pressure supply detection is performed according to a real-time brake system execution process, the detection accuracy of the brake system is improved, it is ensured that the brake oil pressure supply meets actual requirements, and the safety performance of automobile driving is increased.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of brake oil pressure detection, in particular to an oil pressure self-checking analysis system applied to an automobile brake system. BACKGROUND

[0002] The brake oil pressure self-checking can find problems in the brake system in time, ensures driving safety, and the specific method can be that an engine front cover is opened, a brake oil pot is found, the brake oil pot is wiped clean with a paper towel, the brake oil liquid level is observed, the liquid level is observed through the side of the liquid accumulator, and the liquid level should be in the standard position between the upper and lower lines.

[0003] A patent with the publication number CN106773891A discloses a hydraulic retarder controller self-checking system, which can automatically detect data of each part of the hydraulic retarder, the data processing module can automatically analyze the detection data, the dynamic simulation module can dynamically simulate the state of each part of the hydraulic retarder, and the self-checking system can be controlled by an external device.

[0004] However, in the prior art, the brake system cannot detect the current automobile operation when running, so that the risk cannot be determined according to the daily vehicle condition, the oil pressure detection accuracy is reduced, in addition, the brake oil pressure performance cannot be detected, and the brake oil supply efficiency cannot be evaluated and detected according to data collection and analysis.

[0005] In view of the above technical defects, a solution is provided. SUMMARY

[0006] The application provides an oil pressure self-checking analysis system applied to an automobile brake system.

[0007] The application can be realized by the following technical scheme: the oil pressure self-checking analysis system applied to the automobile brake system comprises an oil pressure self-checking platform, and the oil pressure self-checking platform is in communication connection with an automobile operation detection unit, a brake oil pressure performance analysis unit and a brake execution rechecking unit.

[0008] The automobile operation detection unit is used for detecting the automobile operation, collecting overload frequency information and braking distance information, and judging whether the automobile operation detection is abnormal according to information comparison.

[0009] The brake oil pressure performance analysis unit is used for analyzing the brake oil pressure performance of the automobile, collecting oil pressure performance data, inputting the data into a formula to obtain a brake oil pressure performance analysis coefficient in the automobile operation process, and deducing whether the brake oil performance risk is abnormal according to coefficient comparison.

[0010] The brake execution re-inspection unit is used for re-inspecting the brake execution of the automobile, collecting the travel distance parameter and the moving speed parameter, and analyzing and inferring whether the oil pressure supply exists floating during the brake system execution process according to the parameters.

[0011] As a preferred embodiment of the present application, the overload frequency information and the braking distance information are respectively the frequency value ratio of the brake usage frequency when the real-time load is overloaded to the brake usage frequency when the real-time load is not overloaded during the automobile operation process, and the continuous shortening span value of the automobile brake safety braking distance when the brake oil pressure is in the peak stage during the real-time load is overloaded during the automobile operation process.

[0012] As a preferred embodiment of the present application, if the overload frequency information exceeds the usage frequency value ratio threshold value, or the braking distance information exceeds the distance continuous shortening span value threshold value, it is determined that the automobile operation detection is abnormal; if the overload frequency information does not exceed the usage frequency value ratio threshold value, and the braking distance information does not exceed the distance continuous shortening span value threshold value, it is determined that the automobile operation detection is normal.

[0013] As a preferred embodiment of the present application, the oil pressure performance data includes the minimum liquid level height of the brake oil reciprocating floating in the dynamic operation stage of the automobile and the corresponding value ratio floating span value FK of the average liquid level height of the brake oil in the static operation stage of the automobile, the continuous reduction span value JK of the brake oil pressure average value in the brake system with the increase of the brake system operation frequency during the automobile operation process, and the increase span peak value ZK of the contact surface wear amount when the brake pad and the brake disc contact braking during the automobile operation process.

[0014] As a preferred embodiment of the present application, the formula is Wherein, bhj1, bhj2, bhj3 are all preset proportion coefficients.

[0015] As a preferred embodiment of the present application, if the brake oil pressure performance analysis coefficient Y during the automobile operation process exceeds the performance analysis coefficient threshold value range, it is determined that the brake oil performance risk during the automobile operation process is abnormal; if the brake oil pressure performance analysis coefficient Y during the automobile operation process does not exceed the performance analysis coefficient threshold value range, it is determined that the brake oil performance during the automobile operation process is low efficiency; if the brake oil pressure performance analysis coefficient Y during the automobile operation process is in the performance analysis coefficient threshold value range, it is determined that the brake oil performance during the automobile operation process is normal.

[0016] As a preferred embodiment of the present application, the travel distance parameter and the moving speed parameter are respectively the distance deviation amount of the brake pedal moving travel distance corresponding to the brake system under the same braking distance during the brake system execution process, and the moving speed deviation value corresponding to the same stage of the brake pedal travel distance corresponding to the same braking distance when the same force is applied to the brake pedal at different time points during the brake system execution process.

[0017] As a preferred embodiment of the application, if the stroke distance parameter exceeds the stroke distance deviation threshold, or the moving speed parameter exceeds the moving speed deviation threshold, it is determined that there is floating in the oil pressure supply during the brake system execution process; if the stroke distance parameter does not exceed the stroke distance deviation threshold, and the moving speed parameter does not exceed the moving speed deviation threshold, it is determined that there is no floating in the oil pressure supply during the brake system execution process.

[0018] Compared with the prior art, the application has the following beneficial effects:

[0019] 1、In the application, the running of the automobile is detected, and whether the current brake system oil pressure supply risk exceeds the set risk standard is inferred through the automobile running detection, so as to facilitate oil pressure prediction according to real-time daily automobile use state analysis, further improve the accuracy of oil pressure self-checking, and ensure the safety and efficiency of automobile passing; the brake oil pressure performance of the automobile is analyzed, and whether the current brake oil pressure meets the actual demand is inferred according to real-time brake oil pressure supply analysis, so as to facilitate self-checking when the brake system is normally running, ensure the stability of the brake system oil pressure supply, ensure the braking efficiency of the brake system, and improve the safety performance of the automobile running.

[0020] 2、In the application, the brake execution of the automobile is rechecked, real-time brake oil pressure supply detection is performed according to the brake system execution process, the detection accuracy of the brake system is improved, the brake oil pressure supply is ensured to meet the actual demand, and the safety performance of the automobile running is improved.

[0021] The automobile oil pressure is analyzed and predicted, whether the current oil pressure is abnormal is inferred according to real-time automobile brake system oil pressure supply analysis and prediction, so as to facilitate self-checking through oil pressure analysis and active prediction, improve the running stability of the brake system, and ensure the execution efficiency of the brake system. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to facilitate understanding of those skilled in the art, the application will be further described below with reference to the accompanying drawings.

[0023] Figure 1 is a principle block diagram of the first embodiment of the application;

[0024] Figure 2 is a principle block diagram of the second embodiment of the application. DETAILED DESCRIPTION

[0025] In order to make the person skilled in the art better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive or alternative embodiments. It is explicitly contemplated that embodiments described herein can be combined with other embodiments.

[0027] Embodiment one: In this embodiment, the operation scene of the automobile brake system is analyzed by collecting and analyzing multi-aspect data, so as to infer whether the oil pressure performance in the brake system meets the actual demand, thereby improving the safety of the brake;

[0028] Please refer to Figure 1 As shown in the figure, the oil pressure self-checking and analyzing system applied to the automobile brake system comprises an oil pressure self-checking platform, the oil pressure self-checking platform is in communication connection with an automobile operation detection unit, a brake oil pressure performance analyzing unit and a brake execution re-checking unit;

[0029] The oil pressure self-checking platform generates an automobile operation detection signal and sends the automobile operation detection signal to the automobile operation detection unit, the automobile operation detection unit detects the automobile operation after receiving the automobile operation detection signal, and infers whether the current brake system oil pressure supply risk exceeds the set risk standard through the automobile operation detection, so as to facilitate the oil pressure prediction according to the real-time daily automobile use state analysis, further improve the accuracy of the oil pressure self-checking, and ensure the safety efficiency of the automobile passing;

[0030] The frequency value ratio of the brake use frequency in the real-time overload of the automobile operation process to the brake use frequency in the non-overload is obtained, and the continuous shortening span value of the automobile brake safety braking distance in the peak stage of the brake oil pressure in the real-time overload of the automobile operation process is obtained, and the frequency value ratio of the brake use frequency in the real-time overload of the automobile operation process to the brake use frequency in the non-overload and the continuous shortening span value of the automobile brake safety braking distance in the peak stage of the brake oil pressure in the real-time overload of the automobile operation process are marked as overload frequency information and braking distance information respectively, and compared with a use frequency value ratio threshold and a distance continuous shortening span value threshold respectively:

[0031] If the frequency value ratio of the brake usage frequency when the real-time load is overloaded to the brake usage frequency when the real-time load is not overloaded exceeds the usage frequency value ratio threshold, or the continuous shortening span value of the automobile brake safety braking distance when the brake oil pressure is in the peak value stage during the real-time overload of the automobile running process exceeds the distance continuous shortening span value threshold, it is determined that the automobile running detection is abnormal, a running high impact signal is generated and sent to the oil pressure self-checking platform;

[0032] If the frequency value ratio of the brake usage frequency when the real-time load is overloaded to the brake usage frequency when the real-time load is not overloaded does not exceed the usage frequency value ratio threshold, and the continuous shortening span value of the automobile brake safety braking distance when the brake oil pressure is in the peak value stage during the real-time overload of the automobile running process does not exceed the distance continuous shortening span value threshold, it is determined that the automobile running detection is normal, a running low impact signal is generated and sent to the oil pressure self-checking platform;

[0033] The oil pressure self-checking platform continuously receives the running high impact signal to perform voice warning for overload warning, and controls the speed during overload running to reduce the brake pressure;

[0034] Meanwhile, a brake oil pressure performance analysis signal is generated and sent to a brake oil pressure performance analysis unit. After receiving the brake oil pressure performance analysis signal, the brake oil pressure performance analysis unit analyzes the brake oil pressure performance of the automobile, infers whether the current brake oil pressure meets the actual demand according to the real-time brake oil pressure supply analysis, facilitates self-checking when the brake system is normally running, ensures the oil pressure supply stability of the brake system, ensures the braking efficiency of the brake system, and improves the safety performance of the automobile running;

[0035] The corresponding numerical ratio floating span value of the lowest liquid level of the brake oil reciprocating floating in the dynamic running stage of the automobile and the average liquid level of the brake oil in the static running stage of the automobile is obtained, and the corresponding numerical ratio floating span value of the lowest liquid level of the brake oil reciprocating floating in the dynamic running stage of the automobile and the average liquid level of the brake oil in the static running stage of the automobile is marked as FK. The continuous reduction span value of the brake oil pressure average in the brake system with the increase of the running frequency of the brake system during the automobile running process is obtained, and the continuous reduction span value of the brake oil pressure average in the brake system with the increase of the running frequency of the brake system during the automobile running process is marked as JK. The increase span peak value of the contact surface wear amount when the brake pad and the brake disc contact braking during the automobile running process is obtained, and the increase span peak value of the contact surface wear amount when the brake pad and the brake disc contact braking during the automobile running process is marked as ZK;

[0036] The above collected information is uniformly marked as oil pressure performance data, and the brake oil pressure performance analysis coefficient Y during the automobile running process is obtained by substituting the formula, wherein the formula is: Wherein, bhj1, bhj2, bhj3 are respectively the preset proportion coefficient of the floating span value of the lowest liquid level of the brake oil reciprocating floating in the dynamic running stage of the automobile and the corresponding numerical value of the average liquid level of the brake oil in the static running stage of the automobile, the span value of the continuous decrease of the average brake oil pressure in the brake system with the increase of the running frequency of the brake system in the running process of the automobile, and the peak span value of the increase of the contact surface wear amount when the brake pad and the brake disc contact and brake in the running process of the automobile;

[0037] Comparing the brake oil pressure performance analysis coefficient Y in the running process of the automobile with the performance analysis coefficient threshold range:

[0038] If the brake oil pressure performance analysis coefficient Y in the running process of the automobile exceeds the performance analysis coefficient threshold range, it is determined that the brake oil performance risk is abnormal in the running process of the automobile, an oil pressure risk signal is generated and sent to the oil pressure self-checking platform, and the oil pressure self-checking platform receives the oil pressure risk signal, and controls the oil pressure of the brake system to ensure that the oil pressure value is within the set range, and controls the driving speed of the automobile during the oil pressure control;

[0039] If the brake oil pressure performance analysis coefficient Y in the running process of the automobile does not exceed the performance analysis coefficient threshold range, it is determined that the brake oil performance is low in the running process of the automobile, an oil pressure low efficiency signal is generated and sent to the oil pressure self-checking platform, and the oil pressure self-checking platform detects the brake system of the automobile, such as detecting and controlling the oil pressure supply when the automobile is static, increasing the real-time supply amount when the continuous decrease span value of the average brake oil pressure is too low, and reducing the gap between the contact surfaces when the brake pad and the brake disc contact and brake when the contact surface wear amount is too low;

[0040] If the brake oil pressure performance analysis coefficient Y in the running process of the automobile is in the performance analysis coefficient threshold range, it is determined that the brake oil performance risk is normal in the running process of the automobile, an oil pressure safety signal is generated and sent to the oil pressure self-checking platform;

[0041] After the oil pressure self-checking platform receives the oil pressure safety signal, a brake execution rechecking signal is generated and sent to the brake execution rechecking unit, and after the brake execution rechecking unit receives the brake execution rechecking signal, the automobile is subjected to brake execution rechecking, and the brake oil pressure supply is detected according to the real-time brake system execution process, which improves the detection accuracy of the brake system, ensures that the brake oil pressure supply meets the actual demand, and increases the safety performance of the automobile driving;

[0042] The distance deviation of the brake pedal movement of the brake system corresponding to the same braking distance during the execution of the brake system is obtained, and the speed deviation of the brake pedal movement corresponding to the same braking distance during the execution of the brake system is obtained when the same force is applied to the brake pedal at different times. The distance deviation of the brake pedal movement of the brake system corresponding to the same braking distance during the execution of the brake system is marked as a stroke distance parameter, and the speed deviation of the brake pedal movement corresponding to the same braking distance during the execution of the brake system is marked as a movement speed parameter.

[0043] If the distance deviation of the brake pedal movement of the brake system corresponding to the same braking distance during the execution of the brake system exceeds the stroke distance deviation threshold, or the speed deviation of the brake pedal movement corresponding to the same braking distance during the execution of the brake system exceeds the movement speed deviation threshold when the same force is applied to the brake pedal at different times, it is determined that the oil pressure supply during the execution of the brake system is floating, a self-check risk signal is generated and sent to the oil pressure self-check platform, and the oil pressure self-check platform receives the self-check risk signal and re-inspects the brake system and controls the supply of brake oil.

[0044] If the distance deviation of the brake pedal movement of the brake system corresponding to the same braking distance during the execution of the brake system does not exceed the stroke distance deviation threshold, and the speed deviation of the brake pedal movement corresponding to the same braking distance during the execution of the brake system does not exceed the movement speed deviation threshold when the same force is applied to the brake pedal at different times, it is determined that the oil pressure supply during the execution of the brake system is not floating, a self-check qualified signal is generated and sent to the oil pressure self-check platform.

[0045] Embodiment two: The oil pressure self-check is performed when the automobile is running in the previous embodiment. In this embodiment, the real-time oil pressure supply is predicted to infer whether the current oil pressure is abnormal. Please refer to Figure 2 The oil pressure self-check platform is communicatively connected to an oil pressure supply prediction unit.

[0046] The oil pressure self-check platform generates an oil pressure supply prediction signal and sends it to the oil pressure supply prediction unit. The oil pressure supply prediction unit receives the oil pressure supply prediction signal and analyzes and predicts the automobile oil pressure. According to the analysis and prediction of the real-time automobile brake system oil pressure, it is inferred whether the current oil pressure is abnormal. The self-checking and control are facilitated by active prediction through oil pressure analysis, which improves the running stability of the brake system and ensures the execution efficiency of the brake system.

[0047] The corresponding time deviation amount of the full-flow supply time of the brake oil pipeline in the running process of the automobile brake system and the supply time of the brake oil is obtained, and it can be understood that the time deviation is not in the range, which indicates that there is air in the pipeline during the brake oil transportation, which causes no abnormal flow but delays the supply time. The duration of the continuous increase in decibel value caused by the brake braking execution after the brake oil is supplied to the contact surface of the brake pad and the brake disc in the running process of the automobile brake system is obtained, and the corresponding time deviation amount of the full-flow supply time of the brake oil pipeline in the running process of the automobile brake system and the supply time of the brake oil is marked as oil supply time data and decibel increase data, respectively, and compared with the time deviation amount threshold and the continuous increase time threshold, respectively.

[0048] If the corresponding time deviation amount of the full-flow supply time of the brake oil pipeline in the running process of the automobile brake system and the supply time of the brake oil exceeds the time deviation amount threshold, or the duration of the continuous increase in decibel value caused by the brake braking execution after the brake oil is supplied to the contact surface of the brake pad and the brake disc in the running process of the automobile brake system exceeds the continuous increase time threshold, it is determined that the oil pressure supply of the automobile brake system is abnormal, a predicted supply risk signal is generated and sent to the oil pressure self-checking platform, and the oil pressure self-checking platform receives the predicted supply risk signal, adjusts the oil pressure of the brake system and detects the wear of the equipment in the brake system.

[0049] If the corresponding time deviation amount of the full-flow supply time of the brake oil pipeline in the running process of the automobile brake system and the supply time of the brake oil does not exceed the time deviation amount threshold, and the duration of the continuous increase in decibel value caused by the brake braking execution after the brake oil is supplied to the contact surface of the brake pad and the brake disc in the running process of the automobile brake system does not exceed the continuous increase time threshold, it is determined that the oil pressure supply of the automobile brake system is normal, a predicted supply safety signal is generated and sent to the oil pressure self-checking platform.

[0050] In use, the automobile running detection unit is used for detecting the running of the automobile, collecting overload frequency information and braking distance information, and judging whether the automobile running detection is abnormal according to the information comparison; the brake oil pressure performance analysis unit is used for analyzing the brake oil pressure performance of the automobile, collecting oil pressure performance data, and obtaining the brake oil pressure performance analysis coefficient in the running process of the automobile by substituting the formula, and inferring whether the brake oil performance risk is abnormal according to the coefficient comparison; the brake execution re-inspection unit is used for re-inspecting the brake execution of the automobile, collecting stroke distance parameters and moving speed parameters, and inferring whether the oil pressure supply exists floating in the execution process of the brake system according to the parameter analysis.

[0051] The preferred embodiments of the application disclosed above are only used to help explain the application. The preferred embodiments do not describe all the details and limit the application to the specific embodiments. Obviously, many modifications and variations can be made according to the content of the specification. The specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the application, so that those skilled in the art can well understand and utilize the application. The application is limited only by the claims and their full scope and equivalents.

[0052] The above formulas are obtained by collecting a large amount of data for software simulation and selecting a formula close to the true value, and the coefficients in the formula are set by those skilled in the art according to the actual situation; for example, the formula ; a plurality of sample data are collected by those skilled in the art, and a corresponding purification optimization coefficient is set for each group of sample data; the set purification optimization coefficient and the collected sample data are substituted into the formula, any two formulas constitute a binary linear equation set, the calculated coefficients are screened and the mean value is taken, and the values of bhj1, bhj2 and bhj3 are 2.35, 2.27 and 2.7 respectively; the size of the coefficient is a specific value obtained by quantifying each parameter, which is convenient for subsequent comparison, and the size of the coefficient depends on the number of sample data and the preliminary performance analysis coefficient set by those skilled in the art for each group of sample data; as long as it does not affect the proportional relationship between the parameters and the quantized value.

Claims

1. A hydraulic pressure self-testing and analysis system applied to automotive braking systems, characterized in that, This includes a hydraulic self-testing platform, which is connected to a vehicle operation detection unit, a brake hydraulic performance analysis unit, and a brake execution re-testing unit. The vehicle operation detection unit is used to detect vehicle operation, collect overload frequency information and braking distance information, and determine whether the vehicle operation detection is abnormal based on information comparison; The overload frequency information and braking distance information are respectively the frequency ratio of the braking frequency when the vehicle is overloaded to the braking frequency when it is not overloaded during vehicle operation, and the span of continuous shortening of the safe braking distance of the vehicle when the brake oil pressure is at its peak during real-time overload. The brake fluid pressure performance analysis unit is used to analyze the brake fluid pressure performance of automobiles and collect fluid pressure performance data. The fluid pressure performance data includes the ratio of the lowest fluid level height of the brake fluid during the dynamic operation phase to the average fluid level height of the brake fluid during the static operation phase, the fluctuation span value FK; the span value JK of the continuous decrease in the average brake fluid pressure in the braking system as the operating frequency of the braking system increases during vehicle operation; and the peak span value ZK of the increase in wear of the contact surface when the brake pads and brake discs are in contact during braking. Furthermore, by substituting the values ​​into the formula, the performance analysis coefficients of the brake fluid pressure during vehicle operation can be obtained, and the risk of abnormal brake fluid performance can be inferred based on the coefficient comparison. If the brake fluid pressure performance analysis coefficient Y exceeds the performance analysis coefficient threshold range during vehicle operation, the brake fluid performance risk is determined to be abnormal during vehicle operation. If the brake fluid pressure performance analysis coefficient Y does not exceed the performance analysis coefficient threshold range during vehicle operation, the brake fluid performance is determined to be inefficient during vehicle operation. If the brake fluid pressure performance analysis coefficient Y is within the threshold range during vehicle operation, then the brake fluid performance risk during vehicle operation is considered normal. The formula for the brake fluid pressure performance analysis coefficient Y is: Where bhj1, bhj2, and bhj3 are all preset proportional coefficients; The brake execution re-inspection unit is used to re-inspect the brake execution of the vehicle, collect the travel distance parameters and movement speed parameters, and analyze the parameters to infer whether there is fluctuation in the oil pressure supply during the execution of the brake system. The travel distance parameters and movement speed parameters are respectively the distance deviation of the brake pedal movement stroke corresponding to the same braking distance during the execution of the vehicle system, and the movement speed deviation value corresponding to the same stage of the brake pedal travel when the same force is applied to the brake pedal at different times during the execution of the brake system.

2. The hydraulic pressure self-testing and analysis system applied to an automotive braking system according to claim 1, characterized in that, If the overload frequency information exceeds the usage frequency value ratio threshold, or the braking distance information exceeds the distance continuously shortening span value threshold, the vehicle operation detection is determined to be abnormal; if the overload frequency information does not exceed the usage frequency value ratio threshold, and the braking distance information does not exceed the distance continuously shortening span value threshold, the vehicle operation detection is determined to be normal.

3. The hydraulic pressure self-test analysis system applied to an automotive braking system according to claim 1, characterized in that, If the travel distance parameter exceeds the travel distance deviation threshold, or the travel speed parameter exceeds the travel speed deviation threshold, it is determined that the oil pressure supply fluctuates during the braking system operation. If the travel distance parameter does not exceed the travel distance deviation threshold and the moving speed parameter does not exceed the moving speed deviation threshold, then it is determined that there is no fluctuation in the oil pressure supply during the execution of the braking system.

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