Regulation and control method and system for new energy automobile speed reducer assembly

Abstract

The invention discloses a regulation and control method and system for a new energy automobile speed reducer assembly. The method comprises the following steps that the working state of the new energy automobile speed reducer assembly is monitored in real time, and detection data are obtained; obtaining a new energy automobile new energy speed reducer brake pad wear risk assessment index; obtaining a new energy reducer bearing risk assessment index; comprehensively obtaining a comprehensive risk assessment index of the new energy reducer assembly; and comparing an analysis result to regulate and control the new energy automobile speed reducer. The working state of the new energy automobile speed reducer assembly is monitored in real time to obtain detection data, first performance and second performance evaluation analysis is conducted on the data to obtain new energy automobile brake pad abrasion and new energy speed reducer bearing risk evaluation indexes, and the analysis result is compared for regulation and control. The effect of improving the regulation and control real-time performance of the new energy automobile speed reducer assembly is achieved, and the problem of the regulation and control real-time performance of the new energy automobile speed reducer assembly in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile reducer control, and in particular to a control method and system for a new energy automobile reducer assembly. Background Art

[0002] With the global emphasis on environmental protection and sustainable development, the market for new energy vehicles (including electric vehicles, plug-in hybrid vehicles and fuel cell vehicles) has grown rapidly. These vehicles reduce dependence on fossil fuels and greenhouse gas emissions, becoming an important development direction for the automotive industry. The powertrain system of new energy vehicles is its core component, and the reducer assembly is the key link between the motor and the wheels, and its performance directly affects the driving experience, energy efficiency and reliability of the vehicle.

[0003] The existing control method of the reducer assembly of new energy vehicles is achieved through the following technologies, including: electronic control unit technology, using high-performance microprocessors to process sensor signals and control the shifting logic of the reducer, and developing optimized control algorithms to achieve more efficient energy management and shifting strategies; sensor technology, measuring the output torque of the motor or engine to adjust the transmission ratio of the reducer; torque management technology, limiting the output torque of the motor under specific conditions to protect the reducer and extend its life.

[0004] For example, the invention patent with announcement number: CN107132859B announces a transmission torsional vibration control method for a wet dual-clutch transmission, including: 1. Determine the transmission torsional vibration point of the vehicle through a bench test, the engine speed slowly increases from the idle speed to a speed greater than the engine speed when the vehicle is running in the highest gear, and during the engine speed increase, record the engine speed range when the transmission vibrates; 2. Obtain the target speed difference of each gear through a test bench or vehicle calibration; 3: Input the engine speed range and the target speed difference compensation value when the transmission vibrates into the transmission control unit, and when the vehicle is in a certain gear during driving and the engine speed enters the test speed range, compensate the corresponding target speed difference compensation value in step 2.

[0005] For example, the invention patent with announcement number: CN111522342B announces a method and device for processing the speed of an engineering vehicle, including: when the speed difference between the map limit speed of the engineering vehicle between two adjacent path points is greater than a threshold, the speed of the engineering vehicle in the acceleration phase is set, the speed of the engineering vehicle in the deceleration phase is set, and the braking buffer distance is calculated; the accelerator pedal control amount is calculated according to the engineering vehicle speed in the acceleration phase, and the brake pedal control amount is calculated according to the engineering vehicle speed in the deceleration phase and the braking buffer distance; the accelerator pedal control amount and the brake pedal control amount are sent to the PLC controller to adjust the driving speed of the engineering vehicle.

[0006] However, in the process of implementing the technical solution of the invention in the embodiments of the present application, the present application found that the above technology has at least the following technical problems: In the prior art, the control method of the reducer assembly of new energy vehicles is mainly to detect data through various sensors. At the same time, the measurement accuracy of the sensor may not be sufficient to provide accurate working status data of the reducer assembly, and it may be necessary to increase the frequency of data collection to obtain more accurate real-time data. Summary of the invention

[0007] The embodiment of the present application solves the problem of real-time control of the reducer assembly of a new energy vehicle in the prior art by providing a control method and system for the reducer assembly of a new energy vehicle, thereby achieving the effect of improving the real-time control of the reducer assembly of the new energy vehicle.

[0008] The embodiment of the present application provides a method for regulating a reducer assembly of a new energy vehicle, comprising the following steps: real-time monitoring of the working status of the reducer assembly of the new energy vehicle to obtain detection data of the reducer assembly of the new energy vehicle; performing a first performance evaluation analysis of the reducer assembly on the detection data of the reducer assembly of the new energy vehicle to obtain a wear risk assessment index of a brake pad of the new energy vehicle reducer; performing a second performance evaluation analysis of the reducer assembly on the detection data of the reducer assembly of the new energy vehicle to obtain a risk assessment index of a bearing of the new energy reducer; performing a comprehensive analysis to obtain a comprehensive risk assessment index of the new energy reducer assembly; and regulating the reducer of the new energy vehicle according to the threshold comparison analysis results of the reducer assembly of the new energy vehicle.

[0009] Furthermore, the specific process of real-time monitoring of the working status of the new energy vehicle reducer assembly is: installing various sensors on the new energy vehicle reducer assembly; transmitting the collected new energy vehicle reducer assembly detection data to the vehicle's new energy vehicle reducer database via the CAN bus; and performing data cleaning on the collected new energy vehicle reducer assembly detection data.

[0010] Furthermore, the new energy vehicle reducer assembly detection data specifically includes the new energy vehicle reducer assembly detection data including the frequency of use of new energy vehicle brake pads, the overall weight of the new energy vehicle, the operating temperature of the new energy reducer bearing and the friction coefficient of the new energy reducer bearing.

[0011] Furthermore, the specific process of performing the first performance evaluation and analysis of the reducer assembly on the new energy vehicle reducer assembly detection data is: setting a brake pad wear risk detection time period; obtaining the new energy vehicle reducer brake pad time original parameters and the new energy vehicle brake pad operation original parameters in the brake pad wear risk detection time period through the brake pad sensor device, and collecting and obtaining the new energy vehicle weight original parameters in the brake pad wear risk detection time period.

[0012] Furthermore, the specific process of obtaining the analysis results of the new energy vehicle new energy reducer brake pad wear risk assessment index is: data cleaning is performed on the collected new energy vehicle reducer brake pad time original parameters, new energy vehicle brake pad operation original parameters and new energy vehicle weight original parameters to obtain the new energy vehicle reducer brake pad time parameters, new energy vehicle brake pad operation parameters and new energy vehicle weight parameters; and analysis is performed to obtain the new energy vehicle new energy reducer brake pad wear risk assessment index.

[0013] Furthermore, the specific process of conducting the second performance evaluation and analysis of the reducer assembly of the new energy vehicle reducer assembly detection data is as follows: obtaining the operating temperature of the new energy reducer bearing through the temperature sensor device; obtaining the friction coefficient of the new energy reducer bearing through the torque sensor device; obtaining the maximum stress of the new energy reducer bearing and the design stress of the new energy reducer bearing through the pressure sensor, and calculating the safety factor of the new energy reducer bearing; comparing and analyzing the safety factor of the new energy reducer bearing with the preset threshold value, if the safety factor of the new energy reducer bearing is not less than the preset safety factor threshold of the new energy reducer bearing, the risk assessment level of the new energy reducer bearing is marked as low risk; if the safety factor of the new energy reducer bearing is less than the preset safety factor threshold of the new energy reducer bearing, the risk assessment level of the new energy reducer bearing is marked as high risk.

[0014] Furthermore, the specific process of obtaining the analysis results of the risk assessment index of the new energy reducer bearing is: normalizing the collected data; analyzing the correlation between each data feature and the new energy reducer bearing, and removing invalid, erroneous or duplicate data; and analyzing to obtain the new energy reducer bearing risk assessment index.

[0015] Furthermore, the specific process of regulating the new energy vehicle reducer according to the threshold comparison analysis results of the new energy vehicle reducer assembly is: obtaining the comprehensive risk assessment index of the new energy reducer assembly through comprehensive analysis of the new energy vehicle new energy reducer brake pad wear risk assessment index and the new energy reducer bearing risk assessment index; if the new energy reducer assembly comprehensive risk assessment index is lower than the comprehensive threshold and the new energy vehicle new energy reducer brake pad wear risk assessment index is lower than the first threshold and the new energy reducer bearing risk assessment index is lower than the second threshold, the risk level of the new energy vehicle reducer assembly is marked as low risk; if the new energy reducer assembly comprehensive risk assessment index is lower than the first threshold and the new energy reducer bearing risk assessment index is lower than the second threshold, the risk level of the new energy vehicle reducer assembly is marked as low risk. If the risk assessment index of new energy vehicle reducer brake pad wear is lower than the comprehensive threshold or the new energy vehicle new energy reducer brake pad wear risk assessment index is lower than the first threshold and the new energy reducer bearing risk assessment index is lower than the second threshold, the risk level of the new energy vehicle reducer assembly is marked as low risk; if the comprehensive risk assessment index of the new energy reducer assembly is lower than the comprehensive threshold and the new energy vehicle new energy reducer brake pad wear risk assessment index is lower than the first threshold or the new energy reducer bearing risk assessment index is lower than the second threshold, the risk level of the new energy vehicle reducer assembly is marked as low risk; if the comprehensive risk assessment index of the new energy reducer assembly is not lower than the comprehensive threshold or the new energy vehicle new energy reducer brake pad wear risk assessment index If the comprehensive risk assessment index of the new energy reducer assembly is not lower than the comprehensive threshold or the wear risk assessment index of the new energy reducer brake pad of the new energy vehicle is lower than the first threshold and the risk assessment index of the new energy reducer bearing is not lower than the second threshold, the risk level of the new energy vehicle reducer assembly is marked as medium risk; if the comprehensive risk assessment index of the new energy reducer assembly is lower than the comprehensive threshold or the wear risk assessment index of the new energy reducer brake pad of the new energy vehicle is lower than the first threshold and the risk assessment index of the new energy reducer bearing is not lower than the second threshold, the risk level of the new energy vehicle reducer assembly is marked as medium risk; if the comprehensive risk assessment index of the new energy reducer assembly is lower than the comprehensive threshold or the wear risk assessment index of the new energy reducer brake pad of the new energy vehicle is lower than the first threshold and the risk assessment index of the new energy reducer bearing is not lower than the second threshold value, the risk level of the new energy vehicle reducer assembly is marked as medium risk; if the comprehensive risk assessment index of the new energy reducer assembly is lower than the comprehensive threshold or the new energy vehicle new energy reducer brake pad wear risk assessment index is not lower than the first threshold and the new energy reducer bearing risk assessment index is not lower than the second threshold, the risk level of the new energy vehicle reducer assembly is marked as medium risk; if the comprehensive risk assessment index of the new energy reducer assembly is not lower than the comprehensive threshold and the new energy vehicle new energy reducer brake pad wear risk assessment index is not lower than the first threshold and the new energy reducer bearing risk assessment index is not lower than the second threshold, the risk level of the new energy vehicle reducer assembly is marked as high risk.

[0016] Furthermore, the regulation of the new energy vehicle reducer according to the threshold comparison analysis results of the new energy vehicle reducer assembly also includes: if the risk assessment index of the new energy vehicle reducer assembly is marked as high risk, regulation is performed, and an early warning message is sent to relevant personnel through a signal sending device, and the early warning message is used to notify relevant personnel to repair or replace the new energy vehicle reducer assembly; if the risk assessment index of the new energy vehicle reducer assembly is marked as medium risk, regulation is performed, and new energy vehicle brake pad materials with better wear resistance are used to increase the service life of the brake pads; the frequency of regular replacement of lubricating oil is increased; real-time monitoring of the current operating temperature of the new energy reducer bearing, if the current operating temperature is higher than the maximum operating temperature, an alarm is issued; monitoring the new energy vehicle load, if the new energy vehicle load is higher than the preset new energy vehicle load limit, an alarm is issued; if the risk assessment index of the new energy vehicle reducer assembly is marked as low risk, no regulation is performed.

[0017] The embodiment of the present application provides a control system for a new energy vehicle reducer assembly, which includes a module for real-time monitoring of the working state of the new energy vehicle reducer assembly, a first performance evaluation and analysis module for the reducer assembly, a second performance evaluation and analysis module for the reducer assembly, a new energy reducer assembly comprehensive performance evaluation and analysis module, and a control module for the new energy vehicle reducer assembly: a module for real-time monitoring of the working state of the new energy vehicle reducer assembly: used to monitor the working state of the new energy vehicle reducer assembly in real time and obtain detection data of the new energy vehicle reducer assembly; a first performance evaluation and analysis module for the reducer assembly: used to evaluate the detection data of the new energy vehicle reducer assembly; a control module for ... The first performance evaluation and analysis is performed to obtain the wear degree index of the new energy vehicle brake pad; the second performance evaluation and analysis module of the reducer assembly is used to perform the second performance evaluation and analysis of the reducer assembly on the new energy vehicle reducer assembly detection data to obtain the new energy reducer bearing risk assessment index; the comprehensive performance evaluation and analysis module of the new energy reducer assembly is used to obtain the comprehensive risk assessment index of the new energy reducer assembly based on the wear degree index of the new energy vehicle brake pad and the new energy reducer bearing risk assessment index; the adjustment module of the new energy vehicle reducer assembly is used to perform feedback adjustment and optimize the control strategy according to the actual working effect of the new energy vehicle reducer assembly.

[0018] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: 1. The present invention obtains detection data of the new energy vehicle reducer assembly by real-time monitoring of the working state of the new energy vehicle reducer assembly, performs a first performance and a second performance evaluation analysis on the data, obtains a wear risk assessment index of the new energy vehicle reducer brake pad and a new energy reducer bearing risk assessment index, obtains a comprehensive risk assessment index of the new energy reducer assembly by comprehensive analysis, and performs regulation according to the comparative analysis results, thereby achieving the effect of improving the real-time regulation of the new energy vehicle reducer assembly, and solving the problem of real-time regulation of the new energy vehicle reducer assembly in the prior art.

[0019] 2. By evaluating and analyzing the first and second performance of the data, a quantitative comprehensive risk assessment index for new energy reducer assemblies was obtained, so that new energy reducer assembly problems can be identified and analyzed more accurately. According to the comparative analysis results, the operating temperature and lubricating oil status of the new energy vehicle reducer assembly can be adjusted in time to ensure that the working status of the new energy vehicle reducer assembly is always in normal operation.

[0020] 3. By installing body weight collection equipment, brake sensors, temperature sensors and torque sensors, the overall weight of new energy vehicles, brake pad usage time, new energy vehicle brake pad usage frequency, new energy vehicle reducer bearing operating temperature and new energy reducer bearing friction coefficient can be obtained, and the working status of the new energy vehicle reducer assembly can be monitored in real time. The collected data can be deeply analyzed to improve the accuracy of the new energy vehicle reducer assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A flow chart of a control method for a new energy vehicle reducer assembly provided in an embodiment of the present application; Figure 2 A graph of the comprehensive risk assessment index function of a new energy reducer assembly provided in an embodiment of the present application; Figure 3 A schematic diagram of the structure of the control system of the new energy vehicle reducer assembly provided in an embodiment of the present application. DETAILED DESCRIPTION

[0022] The embodiment of the present application solves the problem of real-time control of the reducer assembly of a new energy vehicle in the prior art by providing a control method and system for the reducer assembly of a new energy vehicle. By real-time monitoring of the working status of the reducer assembly of the new energy vehicle, the real-time control of the reducer assembly of the new energy vehicle is improved.

[0023] The technical solution in the embodiment of the present application is to solve the above-mentioned problem of real-time regulation of the reducer assembly of new energy vehicles. The overall idea is as follows: By real-time monitoring of the working status of the new energy vehicle reducer assembly, the detection data of the new energy vehicle reducer assembly is obtained, and the first performance and second performance evaluation and analysis are performed on the data to obtain the new energy vehicle new energy reducer brake pad wear risk assessment index and the new energy reducer bearing risk assessment index. According to the comparative analysis results, regulation is carried out to achieve the effect of improving the real-time regulation of the new energy vehicle reducer assembly.

[0024] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] like Figure 1 As shown, it is a flow chart of the control method of the new energy vehicle reducer assembly provided in the embodiment of the present application. The method is applied to the control system of the new energy vehicle reducer assembly. The method includes the following steps: real-time monitoring of the working status of the new energy vehicle reducer assembly to obtain the detection data of the new energy vehicle reducer assembly; performing a first performance evaluation analysis of the reducer assembly on the detection data of the new energy vehicle reducer assembly to obtain the new energy vehicle new energy reducer brake pad wear risk assessment index; performing a second performance evaluation analysis of the reducer assembly on the detection data of the new energy vehicle reducer assembly to obtain the new energy reducer bearing risk assessment index; comprehensive analysis to obtain the new energy reducer assembly comprehensive risk assessment index; and regulating the new energy vehicle reducer according to the threshold comparison analysis results of the new energy vehicle reducer assembly.

[0026] In this embodiment, the new energy vehicle may encounter different road conditions and changes in body load during driving, and the real-time control system must be able to dynamically adjust the settings of the new energy vehicle reducer assembly.

[0027] Furthermore, the specific process of real-time monitoring of the working status of the new energy vehicle reducer assembly is: installing various sensors on the new energy vehicle reducer assembly; transmitting the collected new energy vehicle reducer assembly detection data to the vehicle's new energy vehicle reducer database via the CAN bus; and performing data cleaning on the collected new energy vehicle reducer assembly detection data.

[0028] Furthermore, the new energy vehicle reducer assembly inspection data specifically includes the new energy vehicle reducer assembly inspection data including the frequency of use of new energy vehicle brake pads, the overall weight of new energy vehicles, the operating temperature of new energy reducer bearings and the friction coefficient of new energy reducer bearings.

[0029] Furthermore, the specific process of conducting the first performance evaluation analysis of the reducer assembly of the new energy vehicle on the detection data of the reducer assembly is: setting the brake pad wear risk detection time period; obtaining the original parameters of the new energy vehicle reducer brake pad time in the brake pad wear risk detection time period and the original parameters of the new energy vehicle brake pad operation in the brake pad wear risk detection time period through the brake pad sensor device, and collecting and obtaining the original parameters of the new energy vehicle weight in the brake pad wear risk detection time period.

[0030] Furthermore, the specific process of obtaining the analysis results of the new energy vehicle new energy reducer brake pad wear risk assessment index is: data cleaning is performed on the collected new energy vehicle reducer brake pad time original parameters, new energy vehicle brake pad operation original parameters and new energy vehicle weight original parameters to obtain the new energy vehicle reducer brake pad time parameters, new energy vehicle brake pad operation parameters and new energy vehicle weight parameters; and analysis is performed to obtain the new energy vehicle new energy reducer brake pad wear risk assessment index.

[0031] In this embodiment, the specific formula of the new energy reducer brake pad wear risk assessment index is obtained through analysis as follows: ; Set the brake pad wear risk detection time period and number the brake pad wear risk detection time periods in sequence. Indicates the number of the brake pad wear risk detection time period, , Indicates the total number of brake pad wear risk detection time periods.

[0032] Indicates The new energy reducer brake pad wear risk assessment index for a brake pad wear risk detection period.

[0033] Indicates The frequency of use of brake pads of new energy vehicles in a brake pad wear risk detection period; the longer the brake pads are used, the higher the degree of wear of the brake pads, which reduces the braking performance of new energy vehicles. Regular inspection and replacement of brake pads can reduce the degree of wear of the brake pads; the more braking times per unit time, the higher the braking frequency, the faster the brake pads wear, the higher the wear risk assessment index of the brake pads, and the use of new energy vehicle brake pad materials with better wear resistance.

[0034] No. The total weight of the new energy vehicle during the brake pad wear risk detection period; as the load of the new energy vehicle increases, the degree of brake pad wear increases, and the brake pad wear risk assessment index will increase. Check the tire pressure of the new energy vehicle regularly. When the load of the new energy vehicle increases, the tire pressure needs to be adjusted to an appropriate level to avoid excessive wear of the brake pad.

[0035] It is the usage time of the brake pads of the new energy vehicle reducer assembly. The usage time of the brake pads of the new energy vehicle reducer assembly is used to describe the total usage time of the brake pads of the new energy vehicle reducer assembly. It is obtained by directly reading the cumulative usage time of the brake pads of the new energy vehicle reducer assembly through the new energy vehicle reducer database.

[0036] It is the preset prediction time of brake pads of reducer assembly of new energy vehicles.

[0037] Indicates The frequency of use of brake pads for new energy vehicles is used to describe the influence of the frequency of use of brake pads for new energy vehicles on the aging speed of brake pads. The value range is .

[0038] Indicates The total weight impact factor of new energy vehicles in the brake pad wear risk detection period is used to describe the impact of the total weight of new energy vehicles on the aging speed of brake pads. The value range is .

[0039] In a specific embodiment, a mapping set is established through the relationship between the frequency of use of new energy vehicle brake pads and the frequency influencing factor of new energy vehicle brake pads in historical new energy vehicle reducer assembly data, and the real-time frequency of use of new energy vehicle brake pads is input into a pre-set mapping set to obtain the corresponding frequency influencing factor of new energy vehicle brake pads.

[0040] Table 1 is an example table of the new energy reducer brake pad wear risk assessment index. The example parameters in Table 1 only take the parameters under one brake pad wear risk detection point for example. Table 1 is shown below.

[0041] Table 1 Example of risk assessment index for brake pad wear of new energy reducer

[0042] A mapping set is established through the relationship between the total weight of new energy vehicles and the influencing factors of the total weight of new energy vehicles in historical new energy vehicle reducer assembly data, and the real-time total weight of new energy vehicles is input into the pre-set mapping set to obtain the corresponding total weight influencing factors of new energy vehicles.

[0043] Furthermore, the specific process of conducting the second performance evaluation and analysis of the reducer assembly of the new energy vehicle reducer assembly detection data is as follows: obtaining the working temperature of the new energy reducer bearing through the temperature sensor device; obtaining the friction coefficient of the new energy reducer bearing through the torque sensor device; obtaining the maximum stress of the new energy reducer bearing and the design stress of the new energy reducer bearing through the pressure sensor, and calculating the safety factor of the new energy reducer bearing; comparing and analyzing the safety factor of the new energy reducer bearing with the preset threshold, if the safety factor of the new energy reducer bearing is not less than the preset safety factor threshold of the new energy reducer bearing, the risk assessment level of the new energy reducer bearing is marked as low risk; if the safety factor of the new energy reducer bearing is less than the preset safety factor threshold of the new energy reducer bearing, the risk assessment level of the new energy reducer bearing is marked as high risk.

[0044] Furthermore, the specific process of obtaining the analysis results of the risk assessment index of the new energy reducer bearing is: normalizing the collected data; analyzing the correlation between each data feature and the new energy reducer bearing, and removing invalid, erroneous or duplicate data; and analyzing to obtain the new energy reducer bearing risk assessment index.

[0045] In this embodiment, the specific formula of the new energy reducer bearing risk assessment index is obtained through analysis as follows: ; Set the new energy reducer bearing risk detection time period, and number the new energy reducer bearing risk detection time periods in sequence. Indicates the number of the brake pad wear risk detection time period, , Indicates the total number of numbers for the new energy reducer bearing risk detection time period.

[0046] Indicates The new energy reducer bearing risk assessment index for the new energy reducer bearing risk detection period.

[0047] Indicates The maximum operating temperature that the new energy reducer bearing can withstand during the new energy reducer bearing risk detection period.

[0048] Indicates The operating temperature of the new energy reducer bearing during the new energy reducer bearing risk detection period.

[0049] Indicates the optimal operating temperature of the new energy reducer bearing.

[0050] Indicates The average ambient temperature of the new energy reducer bearings during the new energy reducer bearing risk detection period.

[0051] Indicates the optimal friction coefficient of new energy reducer bearings.

[0052] Indicates The friction coefficient of the new energy reducer bearing during the new energy reducer bearing risk detection period.

[0053] Indicates The maximum friction coefficient that the new energy reducer bearing can withstand during the new energy reducer bearing risk detection period.

[0054] It represents the safety factor of the new energy reducer bearing. The safety factor of the new energy reducer bearing is equal to the maximum stress of the new energy reducer bearing divided by the design stress of the new energy reducer bearing.

[0055] When When the operating temperature of the new energy reducer bearing in the new energy reducer bearing risk detection time period approaches the optimal operating temperature of the new energy reducer bearing, it means that the temperature has little influence on the new energy reducer bearing risk assessment index; When When the operating temperature of the new energy reducer bearing in the new energy reducer bearing risk detection period approaches the maximum operating temperature that the new energy reducer bearing can withstand, it means that high temperature will accelerate the aging of the new energy reducer bearing, and the new energy reducer bearing risk assessment index is reduced; When When the friction coefficient of the new energy reducer bearing in the new energy reducer bearing risk detection period approaches the optimal friction coefficient of the new energy reducer bearing, it means that the influence of friction on the new energy reducer bearing is small; When When the friction coefficient of the new energy reducer bearing in a new energy reducer bearing risk detection period approaches the maximum friction coefficient that the new energy reducer bearing can withstand, it means that friction will cause faster wear and the new energy reducer bearing risk assessment index is reduced.

[0056] Furthermore, the specific process of regulating the reducer of new energy vehicles according to the threshold comparison analysis results of the reducer assembly of new energy vehicles is as follows: the comprehensive risk assessment index of the new energy reducer assembly is obtained through comprehensive analysis of the new energy reducer brake pad wear risk assessment index and the new energy reducer bearing risk assessment index of the new energy vehicle; if the comprehensive risk assessment index of the new energy reducer assembly is lower than the comprehensive threshold and the new energy reducer brake pad wear risk assessment index of the new energy vehicle is lower than the first threshold and the new energy reducer bearing risk assessment index is lower than the second threshold, the risk level of the new energy vehicle reducer assembly is marked as low risk; if the comprehensive risk assessment index of the new energy reducer assembly is low If the comprehensive threshold is lower than the comprehensive threshold or the new energy vehicle new energy reducer brake pad wear risk assessment index is lower than the first threshold and the new energy reducer bearing risk assessment index is lower than the second threshold, the risk level of the new energy vehicle reducer assembly is marked as low risk; if the new energy reducer assembly comprehensive risk assessment index is lower than the comprehensive threshold and the new energy vehicle new energy reducer brake pad wear risk assessment index is lower than the first threshold or the new energy reducer bearing risk assessment index is lower than the second threshold, the risk level of the new energy vehicle reducer assembly is marked as low risk; if the new energy reducer assembly comprehensive risk assessment index is not lower than the comprehensive threshold or the new energy vehicle new energy reducer brake pad wear risk assessment index is not If the risk assessment index of the new energy reducer assembly is lower than the first threshold and the risk assessment index of the new energy reducer bearing is lower than the second threshold, the risk level of the new energy vehicle reducer assembly is marked as medium risk; if the comprehensive risk assessment index of the new energy reducer assembly is not lower than the comprehensive threshold or the new energy vehicle new energy reducer brake pad wear risk assessment index is lower than the first threshold and the new energy reducer bearing risk assessment index is not lower than the second threshold, the risk level of the new energy vehicle reducer assembly is marked as medium risk; if the comprehensive risk assessment index of the new energy reducer assembly is lower than the comprehensive threshold or the new energy vehicle new energy reducer brake pad wear risk assessment index is lower than the first threshold and the new energy reducer bearing risk assessment index is not lower than the second threshold value, the risk level of the new energy vehicle reducer assembly is marked as medium risk; if the comprehensive risk assessment index of the new energy reducer assembly is lower than the comprehensive threshold or the new energy vehicle new energy reducer brake pad wear risk assessment index is not lower than the first threshold and the new energy reducer bearing risk assessment index is not lower than the second threshold, the risk level of the new energy vehicle reducer assembly is marked as medium risk; if the comprehensive risk assessment index of the new energy reducer assembly is not lower than the comprehensive threshold and the new energy vehicle new energy reducer brake pad wear risk assessment index is not lower than the first threshold and the new energy reducer bearing risk assessment index is not lower than the second threshold, the risk level of the new energy vehicle reducer assembly is marked as high risk.

[0057] In this embodiment, the specific formula of the comprehensive risk assessment index of the new energy reducer assembly is obtained through analysis as follows: ; ; Represents the comprehensive risk assessment index of new energy reducer assembly.

[0058] Indicates The new energy reducer brake pad wear risk assessment index for a brake pad wear risk detection period.

[0059] Indicates The new energy reducer bearing risk assessment index for the new energy reducer bearing risk detection period.

[0060] Represents the weight factor of the new energy reducer brake pad wear risk assessment index.

[0061] Represents the weight factor of the risk assessment index of new energy reducer bearings.

[0062] In a specific embodiment, high speed will increase the wear of brake pads, especially in frequent braking applications, bearings will generate more heat when rotating at high speed, increase lubricant consumption, and may cause early fatigue. A mapping set is established through the relationship between the new energy vehicle speed and the new energy reducer brake pad wear risk assessment index weight factor and the new energy reducer bearing risk assessment index weight factor in the historical new energy vehicle reducer assembly data, and the real-time new energy vehicle speed is input into the pre-set mapping set to obtain the corresponding new energy reducer brake pad wear risk assessment index weight factor and new energy reducer bearing risk assessment index weight factor.

[0063] If the wear risk assessment index of the brake pad is high, it means that there may be safety hazards in the braking system of the new energy vehicle, and the comprehensive risk assessment index of the new energy reducer assembly will increase; If the risk assessment index of the reducer bearing is high, it means that there may be a risk of failure in the power transmission system of the new energy vehicle, and the comprehensive risk assessment index of the new energy reducer assembly will increase.

[0064] When both are at a high risk level at the same time, the comprehensive risk assessment index will be higher, which means that the overall condition of the new energy reducer assembly is poor and requires immediate maintenance or replacement.

[0065] like Figure 2 As shown, it is a graph of the comprehensive risk assessment index function of the new energy reducer assembly provided in an embodiment of the present application; x is the positive half axis of the horizontal axis, and y is the positive half axis of the vertical axis.

[0066] Curve a indicates that if the weight factor of the new energy reducer brake pad wear risk assessment index is set to a fixed value of 0.6, if the weight factor of the new energy reducer bearing risk assessment index is set to a fixed value of 0.4, if the new energy reducer brake pad wear risk assessment index is set to a fixed value of 1, if the new energy reducer bearing risk assessment index is set to x, if the new energy reducer assembly comprehensive risk assessment index is set to y, then the new energy reducer assembly comprehensive risk assessment index increases with the increase of the new energy reducer bearing risk assessment index.

[0067] Curve b indicates that if the weight factor of the new energy reducer brake pad wear risk assessment index is set to a fixed value of 0.6, if the weight factor of the new energy reducer bearing risk assessment index is set to a fixed value of 0.4, if the new energy reducer bearing risk assessment index is set to a fixed value of 1, if the new energy reducer brake pad wear risk assessment index is set to x, if the new energy reducer assembly comprehensive risk assessment index is set to y, then the new energy reducer assembly comprehensive risk assessment index increases with the increase of the new energy reducer bearing risk assessment index.

[0068] Furthermore, regulating the reducer of the new energy vehicle according to the threshold comparison analysis results of the reducer assembly of the new energy vehicle also includes: if the risk assessment index of the reducer assembly of the new energy vehicle is marked as high risk, regulation is performed, and an early warning message is sent to relevant personnel through a signal sending device, and the early warning message is used to notify relevant personnel to repair or replace the reducer assembly of the new energy vehicle, such as readjusting the internal parts of the reducer, calibrating or lubricating the reducer gears and other moving parts; if the risk assessment index of the reducer assembly of the new energy vehicle is marked as medium risk, regulation is performed, and new energy vehicle brake pad materials with better wear resistance are used to increase the service life of the brake pads; the frequency of regular replacement of lubricating oil is increased; real-time monitoring of the current operating temperature of the new energy reducer bearing, if the current operating temperature is higher than the maximum operating temperature, an alarm is issued; monitoring the vehicle load of the new energy vehicle, if the vehicle load of the new energy vehicle is higher than the preset vehicle load limit of the new energy vehicle, an alarm is issued; if the risk assessment index of the reducer assembly of the new energy vehicle is marked as low risk, no regulation is performed.

[0069] like Figure 3As shown, it is a structural schematic diagram of the control system of the new energy vehicle reducer assembly provided in the embodiment of the present application. The control system of the new energy vehicle reducer assembly provided in the embodiment of the present application includes: a module for real-time monitoring of the working state of the new energy vehicle reducer assembly, a first performance evaluation and analysis module of the reducer assembly, a second performance evaluation and analysis module of the reducer assembly, a new energy reducer assembly comprehensive performance evaluation and analysis module and a control module for the new energy vehicle reducer assembly: a module for real-time monitoring of the working state of the new energy vehicle reducer assembly: used to monitor the working state of the new energy vehicle reducer assembly in real time and obtain the detection data of the new energy vehicle reducer assembly; a first performance evaluation and analysis module of the reducer assembly: used to The first performance evaluation and analysis of the reducer assembly is performed on the reducer assembly test data to obtain the wear degree index of the new energy vehicle brake pad; the second performance evaluation and analysis module of the reducer assembly: used to perform the second performance evaluation and analysis of the reducer assembly on the new energy vehicle reducer assembly test data to obtain the new energy reducer bearing risk assessment index; the comprehensive performance evaluation and analysis module of the new energy reducer assembly: used to obtain the comprehensive risk assessment index of the new energy reducer assembly based on the combined analysis of the wear degree index of the new energy vehicle brake pad and the new energy reducer bearing risk assessment index; the adjustment module of the new energy vehicle reducer assembly: used to perform feedback adjustment and optimize the control strategy based on the actual working effect of the new energy vehicle reducer assembly.

[0070] The technical scheme in the above-mentioned embodiment of the present application has at least the following technical effects or advantages: relative to a transmission system torsional vibration control method equipped with a wet dual-clutch transmission disclosed in a patent application with publication number: CN107132859B, the embodiment of the present application obtains a comprehensive risk assessment index of a new energy reducer assembly through a comprehensive analysis of a wear risk assessment index of a new energy reducer brake pad and a risk assessment index of a new energy reducer bearing of a new energy vehicle, so as to better quantify the detection data of the reducer assembly of the new energy vehicle, including the usage time of the brake pad, the usage frequency of the brake pad of the new energy vehicle, the overall weight of the new energy vehicle, the operating temperature of the new energy reducer bearing and the friction coefficient of the new energy reducer bearing, so as to analyze these detection data of the reducer assembly of the new energy vehicle. The new energy vehicle reducer assembly is regulated based on the comparative analysis results, thereby improving the real-time regulation of the new energy vehicle reducer assembly; relative to a method for speed processing of an engineering vehicle disclosed in a patent application with publication number: CN111522342B, the embodiment of the present application assesses the comprehensive risk assessment level of the new energy reducer assembly as high risk, medium risk, and low risk by ensuring that the comprehensive risk assessment level of the new energy reducer assembly is within an adjustable range, and regulates the new energy reducer assembly with a comprehensive risk assessment level of high risk and medium risk, and the regulation includes using new energy vehicle brake pad materials with better wear resistance, regularly replacing lubricating oil, and real-time monitoring of the current operating temperature of the new energy reducer bearing, thereby improving the accuracy of the new energy vehicle reducer assembly.

[0071] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0072] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A system that specifies the functions of a box or multiple boxes.

[0073] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a product including an instruction system, which is implemented in the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0074] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0075] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0076] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A control method for a new energy vehicle reducer assembly, characterized in that: The following steps are involved: Monitor the working status of the reducer assembly of new energy vehicles in real time and obtain the detection data of the reducer assembly of new energy vehicles; The first performance evaluation and analysis of the reducer assembly of new energy vehicles is conducted on the test data of the reducer assembly, and the wear risk assessment index of the brake pad of the new energy reducer of new energy vehicles is obtained; The second performance evaluation analysis of the reducer assembly of new energy vehicles is carried out on the detection data of the reducer assembly to obtain the risk assessment index of the new energy reducer bearing; Comprehensive analysis yields the comprehensive risk assessment index of new energy reducer assembly; The reducer of new energy vehicles is regulated based on the threshold comparison analysis results of the reducer assembly of new energy vehicles.

2. A control method for a new energy vehicle reducer assembly as claimed in claim 1, characterized in that: The specific process of real-time monitoring of the working state of the reducer assembly of the new energy vehicle is as follows: Install various sensors on the reducer assembly of new energy vehicles; The collected new energy vehicle reducer assembly detection data is transmitted to the vehicle's new energy vehicle reducer database via the CAN bus; The collected new energy vehicle reducer assembly test data is cleaned.

3. A control method for a new energy vehicle reducer assembly as claimed in claim 1, characterized in that: The new energy vehicle reducer assembly detection data specifically includes the new energy vehicle reducer assembly detection data including the frequency of use of new energy vehicle brake pads, the overall weight of the new energy vehicle, the operating temperature of the new energy reducer bearing and the friction coefficient of the new energy reducer bearing.

4. A control method for a new energy vehicle reducer assembly as claimed in claim 1, characterized in that: The specific process of performing the first performance evaluation analysis of the reducer assembly on the new energy vehicle reducer assembly detection data is as follows: Set the brake pad wear risk detection time period; The brake pad sensor device is used to obtain the original parameters of the new energy vehicle reducer brake pad time during the brake pad wear risk detection period and the original parameters of the new energy vehicle brake pad operation during the brake pad wear risk detection period, and the original parameters of the new energy vehicle weight during the brake pad wear risk detection period are collected and obtained.

5. A control method for a new energy vehicle reducer assembly as claimed in claim 1, characterized in that: The specific process of obtaining the analysis result of the wear risk assessment index of the brake pad of the new energy vehicle new energy reducer is as follows: The collected original parameters of the brake pad time of the new energy vehicle reducer, the original parameters of the brake pad operation of the new energy vehicle, and the original parameters of the weight of the new energy vehicle are cleaned to obtain the time parameters of the brake pad time of the new energy vehicle reducer, the operating parameters of the brake pad of the new energy vehicle, and the weight parameters of the new energy vehicle; The analysis results show the wear risk assessment index of brake pads for new energy vehicles and new energy reducers.

6. A control method for a new energy vehicle reducer assembly as claimed in claim 1, characterized in that: The specific process of performing the second performance evaluation analysis of the reducer assembly on the new energy vehicle reducer assembly test data is as follows: The operating temperature of the new energy reducer bearing is obtained through the temperature sensor device; The friction coefficient of the new energy reducer bearing is obtained through the torque sensor equipment; The maximum stress and design stress of the new energy reducer bearing are obtained through the pressure sensor, and the safety factor of the new energy reducer bearing is calculated; Compare and analyze the safety factor of the new energy reducer bearing with the preset threshold. If the safety factor of the new energy reducer bearing is not less than the preset safety factor threshold of the new energy reducer bearing, the risk assessment level of the new energy reducer bearing is marked as low risk; If the safety factor of the new energy reducer bearing is less than the preset safety factor threshold of the new energy reducer bearing, the risk assessment level of the new energy reducer bearing is marked as high risk.

7. A control method for a new energy vehicle reducer assembly as claimed in claim 1, characterized in that: The specific process of obtaining the risk assessment index analysis results of the new energy reducer bearing is as follows: Normalize the collected data; Analyze the correlation between each data feature and new energy reducer bearings, and remove invalid, erroneous or duplicate data; The risk assessment index of new energy reducer bearings is obtained through analysis.

8. A control method for a new energy vehicle reducer assembly as claimed in claim 1, characterized in that: The specific process of regulating the new energy vehicle reducer according to the threshold comparison analysis result of the new energy vehicle reducer assembly is as follows: The comprehensive risk assessment index of the new energy reducer assembly is obtained by comprehensively analyzing the wear risk assessment index of the new energy reducer brake pad and the new energy reducer bearing risk assessment index of the new energy vehicle; If the comprehensive risk assessment index of the new energy reducer assembly is lower than the comprehensive threshold, the new energy vehicle reducer brake pad wear risk assessment index is lower than the first threshold, and the new energy reducer bearing risk assessment index is lower than the second threshold, the risk level of the new energy vehicle reducer assembly is marked as low risk; If the comprehensive risk assessment index of the new energy reducer assembly is lower than the comprehensive threshold or the new energy vehicle new energy reducer brake pad wear risk assessment index is lower than the first threshold and the new energy reducer bearing risk assessment index is lower than the second threshold, the risk level of the new energy vehicle reducer assembly is marked as low risk; If the comprehensive risk assessment index of the new energy reducer assembly is lower than the comprehensive threshold and the new energy vehicle new energy reducer brake pad wear risk assessment index is lower than the first threshold or the new energy reducer bearing risk assessment index is lower than the second threshold, the risk level of the new energy vehicle reducer assembly is marked as low risk; If the comprehensive risk assessment index of the new energy reducer assembly is not lower than the comprehensive threshold or the new energy reducer brake pad wear risk assessment index of the new energy vehicle is not lower than the first threshold and the new energy reducer bearing risk assessment index is lower than the second threshold, the risk level of the new energy vehicle reducer assembly is marked as medium risk; If the comprehensive risk assessment index of the new energy reducer assembly is not lower than the comprehensive threshold or the new energy reducer brake pad wear risk assessment index of the new energy vehicle is lower than the first threshold and the new energy reducer bearing risk assessment index is not lower than the second threshold, the risk level of the new energy vehicle reducer assembly is marked as medium risk; If the comprehensive risk assessment index of the new energy reducer assembly is lower than the comprehensive threshold or the new energy vehicle new energy reducer brake pad wear risk assessment index is lower than the first threshold and the new energy reducer bearing risk assessment index is not lower than the second threshold, the risk level of the new energy vehicle reducer assembly is marked as medium risk; If the comprehensive risk assessment index of the new energy reducer assembly is lower than the comprehensive threshold or the new energy reducer brake pad wear risk assessment index of the new energy vehicle is not lower than the first threshold and the new energy reducer bearing risk assessment index is not lower than the second threshold, the risk level of the new energy vehicle reducer assembly is marked as medium risk; If the comprehensive risk assessment index of the new energy reducer assembly is not lower than the comprehensive threshold, the new energy vehicle new energy reducer brake pad wear risk assessment index is not lower than the first threshold, and the new energy reducer bearing risk assessment index is not lower than the second threshold, the risk level of the new energy vehicle reducer assembly will be marked as high risk.

9. A control method for a new energy vehicle reducer assembly as claimed in claim 1, characterized in that: The step of regulating the reducer of the new energy vehicle according to the threshold comparison analysis result of the reducer assembly of the new energy vehicle further includes: If the risk assessment index of the new energy vehicle reducer assembly is marked as high risk, regulation is carried out, and a warning message is sent to relevant personnel through a signal sending device, and the warning message is used to notify relevant personnel to repair or replace the new energy vehicle reducer assembly; If the risk assessment index of the new energy vehicle reducer assembly is marked as medium risk, regulation will be carried out to use new energy vehicle brake pad materials with better wear resistance to increase the service life of the brake pads; Increase the frequency of regular lubricant changes; Real-time monitoring of the current operating temperature of the new energy reducer bearing. If the current operating temperature is higher than the maximum operating temperature, an alarm will be issued; Monitor the vehicle load of new energy vehicles, and issue an alarm if the vehicle load of the new energy vehicle exceeds the preset vehicle load limit of the new energy vehicle; If the risk assessment index of the new energy vehicle reducer assembly is marked as low risk, no regulation will be carried out.

10. A control system for a new energy vehicle reducer assembly, characterized in that: It includes a module for real-time monitoring of the working status of the reducer assembly of new energy vehicles, a first performance evaluation and analysis module for the reducer assembly, a second performance evaluation and analysis module for the reducer assembly, a comprehensive performance evaluation and analysis module for the new energy reducer assembly, and a control module for the reducer assembly of new energy vehicles: Real-time monitoring of the working status of the reducer assembly of new energy vehicles: used to monitor the working status of the reducer assembly of new energy vehicles in real time and obtain the detection data of the reducer assembly of new energy vehicles; The first performance evaluation and analysis module of the reducer assembly is used to perform the first performance evaluation and analysis of the reducer assembly of the new energy vehicle on the detection data of the reducer assembly, and obtain the wear degree index of the brake pad of the new energy vehicle; Reducer assembly second performance evaluation and analysis module: used to perform reducer assembly second performance evaluation and analysis on the new energy vehicle reducer assembly test data to obtain the new energy reducer bearing risk assessment index; New energy reducer assembly comprehensive performance evaluation and analysis module: used to obtain the new energy reducer assembly comprehensive risk assessment index based on the wear degree index of the new energy vehicle brake pad and the new energy reducer bearing risk assessment index; Adjustment module of new energy vehicle reducer assembly: used to perform feedback adjustment and optimize control strategy according to the actual working effect of the new energy vehicle reducer assembly.

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