CN116773185B - Durability experiment method, device and equipment for hydraulic torque converter and readable storage medium - Google Patents
Durability experiment method, device and equipment for hydraulic torque converter and readable storage medium Download PDFInfo
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- CN116773185B CN116773185B CN202311036767.5A CN202311036767A CN116773185B CN 116773185 B CN116773185 B CN 116773185B CN 202311036767 A CN202311036767 A CN 202311036767A CN 116773185 B CN116773185 B CN 116773185B
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Abstract
The present disclosure relates to a torque converter durability test method, apparatus, device, and readable storage medium, the method comprising: determining running state data of the vehicle under a preset working condition based on the actual working condition data obtained by the real lane road test; determining target torque information of an input motor according to the driving state data; determining target rotation speed information of the output motor according to the running state data; the input motor is controlled to work according to the target torque information, and the output motor is controlled to work according to the target rotating speed information so as to carry out a durability experiment on the hydraulic torque converter to be tested, which is arranged on the test bench; and obtaining an experimental result of the hydraulic torque converter to be tested according to experimental data acquired in the endurance experiment process. According to the method, the durability test is conducted on the working state of the hydraulic torque converter to be tested, which is located between the input motor and the output motor, in an actual vehicle, so that various parameters obtained in the durability test are more similar to those in a real working condition, and the accuracy of test results is improved.
Description
Technical Field
The disclosure relates to the technical field of testing, in particular to a durability test method, a device and equipment for a hydraulic torque converter and a readable storage medium.
Background
Torque converters are important transmission components on automatic transmissions for transmitting rotational speed and torque, and also make the connection between the engine and the automatic transmission non-rigid to facilitate automatic shifting of the automatic transmission.
The durability test is a test performed to determine the service life of a product under prescribed use and maintenance conditions, and to predict or verify structural weaknesses and dangerous parts. Through endurance test, find out the problem that part reliability exists in the product design manufacturing to carry out the improvement design or improve the technology level, through measuring the wearing and tearing volume change of main part simultaneously, can calculate the life of new product.
The existing torque converter manufacturers generally test the part of the torque converter independently, but the accuracy of experimental results is not high due to the large difference between the test conditions and the actual working conditions.
Disclosure of Invention
In order to solve the technical problems, the disclosure provides a durability test method, a device, equipment and a readable storage medium for a hydraulic torque converter, so as to improve the accuracy of test results.
In a first aspect, embodiments of the present disclosure provide a torque converter endurance test method applied to a test bench including an input motor and a plurality of output motors, including:
determining running state data of the vehicle under a preset working condition based on the actual working condition data obtained by the real lane road test;
determining target torque information of an input motor according to the driving state data;
determining target rotation speed information of an output motor according to the running state data;
controlling the input motor to work according to the target torque information, and controlling the output motor to work according to the target rotating speed information so as to carry out a durability experiment on the hydraulic torque converter to be tested, which is arranged on the test bench;
and obtaining an experimental result of the hydraulic torque converter to be tested according to experimental data acquired in the endurance experimental process.
In some embodiments, the travel state data includes accelerator opening, engine speed, transmission operating information;
the determining the target torque information of the input motor according to the driving state data comprises the following steps:
determining initial torque information from a preset engine working characteristic table according to the accelerator opening and the engine rotating speed;
and adjusting the initial torque according to the working information of the transmission to obtain the target torque information.
In some embodiments, the travel state data includes drive wheel torque, total vehicle resistance;
the determining the target rotation speed information of the output motor according to the running state data comprises the following steps:
calculating speed information of the vehicle according to the torque of the driving wheels and the total resistance of the vehicle;
and determining the control rotation speed of the driving wheel as the target rotation speed information according to the speed information of the vehicle.
In some embodiments, the obtaining the experimental result of the torque converter to be tested according to the experimental data collected in the endurance test process includes:
calculating the experimental sliding friction work of the hydraulic torque converter to be tested in the endurance test process according to the experimental data acquired in the endurance test process;
and comparing the experimental sliding friction work with a design threshold value corresponding to the hydraulic torque converter to be tested, and determining the durability of the hydraulic torque converter to be tested.
In some embodiments, the driving state data further includes actual work on skid;
the method further comprises the steps of:
and comparing the experimental sliding friction work with the actual sliding friction work, and determining the similarity between the experimental working condition of the endurance experiment and the preset working condition.
In some embodiments, the determining the driving state data of the vehicle under the preset working condition based on the actual working condition data obtained by the real lane road test includes:
preprocessing the actual working condition data to obtain processed actual working condition data;
and determining the running state data of the vehicle under the preset working condition based on the processed actual working condition data.
In some embodiments, the preprocessing operation for the actual working condition data includes at least one of the following:
the method comprises the steps of removing actual working condition data when the hydraulic torque converter is not operated, selecting working condition data when the working state change frequency of the hydraulic torque converter is greater than a first preset threshold value, and removing working condition data when the vehicle vibration value is greater than a second preset threshold value.
In a second aspect, embodiments of the present disclosure provide a torque converter durability test apparatus, comprising:
the first determining module is used for determining running state data of the vehicle under a preset working condition based on the actual working condition data obtained by the real lane road test;
the second determining module is used for determining target torque information of the input motor according to the driving state data;
the third determining module is used for determining target rotating speed information of the output motor according to the running state data;
the control module is used for controlling the input motor to work according to the target torque information and controlling the output motor to work according to the target rotating speed information so as to carry out a durability experiment on the hydraulic torque converter to be tested which is arranged on the test bench;
and the fourth determining module is used for obtaining the experimental result of the hydraulic torque converter to be tested according to the experimental data acquired in the endurance experimental process.
In a third aspect, an embodiment of the present disclosure provides an electronic device, including:
a memory;
a processor; and
a computer program;
wherein the computer program is stored in the memory and configured to be executed by the processor to implement the method according to the first aspect.
In a fourth aspect, embodiments of the present disclosure provide a computer-readable storage medium having stored thereon a computer program for execution by a processor to implement the method of the first aspect.
In a fifth aspect, the presently disclosed embodiments also provide a computer program product comprising a computer program or instructions which, when executed by a processor, implements a torque converter durability test method as described above.
According to the method, the device, the equipment and the readable storage medium for the durability test of the hydraulic torque converter, provided by the embodiment of the disclosure, the engine in an actual vehicle is simulated by controlling the input motor, the driving wheel in the actual vehicle is simulated by controlling the output motor, and the durability test is performed on the working state of the hydraulic torque converter to be tested, which is positioned between the input motor and the output motor, in the actual vehicle, so that various parameters obtained by the durability test are more similar to the situation under the actual working condition, and the accuracy of the test result is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments of the present disclosure or the solutions in the prior art, the drawings that are required for the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a flow chart of a torque converter durability test method provided by an embodiment of the present disclosure;
fig. 2 is a schematic diagram of an application scenario provided in an embodiment of the present disclosure;
FIG. 3 is a flow chart of a torque converter durability test method provided by another embodiment of the present disclosure;
FIG. 4 is a schematic structural diagram of a torque converter durability test apparatus provided by an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, a further description of aspects of the present disclosure will be provided below. It should be noted that, without conflict, the embodiments of the present disclosure and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the disclosure.
FIG. 1 is a flow chart of a torque converter durability test method provided by an embodiment of the present disclosure. The method can be applied to the application scenario shown in fig. 2, where the application scenario includes a test bench, where the test bench includes an input motor 21, a left output motor 22, a right output motor 23, and a transmission device between the input motor and each output motor, where the working states of the input motor 21, the left output motor 22, and the right output motor 23 can be controlled by a bench control system (not shown in the figure). It is appreciated that the torque converter durability test method provided by the embodiments of the present disclosure may also be applied in other scenarios.
The following describes the endurance test method of the torque converter shown in fig. 1 in combination with the application scenario shown in fig. 2, and the method includes the following specific steps:
s101, determining running state data of the vehicle under a preset working condition based on actual working condition data obtained by a real lane road test.
The real-lane road test refers to obtaining the feedback information given to the automobile by road surface excitation in the running process of the automobile on the real road, so as to obtain the data of the actual working condition. The actual condition data includes, but is not limited to, road category, driving state data of the vehicle, and the like. The running state data of the vehicle comprises a hydraulic torque converter working state, a hydraulic torque converter input rotating speed, a hydraulic torque converter output rotating speed, hydraulic torque converter input and output torque, throttle control information, a whole vehicle inclination angle, a brake system working state, an engine rotating speed, transmission working information, driving wheel torque, clutch pressure, a vehicle vibration value, oil temperature, vehicle speed and the like. It can be understood that the running state data of the vehicle is the data of each measuring point moment in the real vehicle road test.
In some embodiments, according to the reliability evaluation index of the GT/T12678-1990 automobile in the automobile reliability driving test method, the actual road driving condition is combined, and the actual road is tested on different typical roads, so that the actual working condition data is collected.
In the real-lane road test process, according to different road conditions and different vehicle driving modes, determining the duration or kilometers to be carried out in each road test, wherein each working condition is tested for 2-3 times, and each test is carried out by a plurality of different drivers.
In some embodiments, the torque converter operating state and torque versus time may be derived from vehicle state data,
the preset working condition refers to the working condition required to be verified by the endurance test to be performed, and can be any one or more than one of the real vehicle road tests. After determining a preset working condition required to be verified in the endurance experiment, selecting the running state data of the vehicle corresponding to the preset working condition from the actual working condition data.
S102, determining target torque information of the input motor according to the driving state data.
The input motor is used to simulate an engine in a real vehicle. And determining the torque provided by the vehicle engine under the preset working condition as target torque information according to the running state data, so as to control the input motor to work according to the target torque information.
It will be appreciated that the target torque information includes the torque input to the motor at each time during the endurance test, i.e., the torque input to the motor at each time during one endurance test may be varied instead of a fixed value.
In some embodiments, a torque sensor is mounted on the input motor end to monitor the torque of the input motor.
In some embodiments, the input motor is a high dynamic response permanent magnet synchronous motor to simulate an engine in a real vehicle.
S103, determining target rotation speed information of the output motor according to the running state data.
The output motor is used to simulate the drive wheels in a real vehicle. According to the running state data, the rotating speed of the driving wheels of the vehicle under the preset working condition is determined to serve as target rotating speed information, and accordingly the output motor is controlled to work according to the target rotating speed information.
It will be appreciated that the target rotational speed information includes the rotational speed of the output motor at each time during the endurance test, i.e., the rotational speed of the output motor at each time during one endurance test may be varied instead of a fixed value.
In some embodiments, a torque sensor is mounted at the output motor end, and the rotational speed of the output motor is obtained in combination with parameters of the output motor to monitor the rotational speed of the output motor. Or the output motor end is provided with a rotation speed sensor, and the rotation speed of the output motor is monitored through the rotation speed sensor.
In some embodiments, the test bench may be set up according to actual needs. For example, if it is desired to simulate the operating state of the transmission in a front-drive vehicle, as shown in fig. 2, the left output motor 22 represents the left front wheel, the right output motor 23 represents the right front wheel, and the output motors in this step may be the left output motor 22 and the right output motor 23.
S104, controlling the input motor to work according to the target torque information, and controlling the output motor to work according to the target rotating speed information so as to carry out endurance experiments on the hydraulic torque converter to be tested which is arranged on the test bench.
The hydraulic torque converter to be tested is positioned in the transmission between the input motor and the output motor, is particularly positioned at the input end of the transmission, and is used for oiling the assembly system to a standard working oil level.
In the endurance experiment, the input motor is controlled to work according to the target torque information, and the output motor is controlled to work according to the target rotating speed information, so that a load is applied to the hydraulic torque converter to be tested to simulate an actual working environment. Meanwhile, parameters such as output torque, speed, oil temperature, oil pressure and the like of the hydraulic torque converter are required to be collected, the working state and appearance of the hydraulic torque converter are monitored, and no obvious abnormal phenomenon is ensured.
S105, according to experimental data acquired in the endurance experiment process, an experimental result of the hydraulic torque converter to be tested is obtained.
In the endurance test process, test data are collected according to various sensors arranged at various positions in a test bench, and an experimental result of the hydraulic torque converter to be tested is obtained according to analysis and calculation of the test data.
After the endurance test is finished, the hydraulic torque converter to be tested is ensured to meet the following requirements: the friction material of the hydraulic torque converter has no flaking, expansion and crack; the abrasion thickness of the friction plate of the hydraulic torque converter meets the requirements of technical files; the functional requirement of the hydraulic torque converter assembly can be ensured; the friction characteristics of the torque converter clutch meet technical file requirements.
According to the embodiment of the disclosure, the running state data of the vehicle under the preset working condition is determined by the actual working condition data obtained based on the real lane road test; determining target torque information of an input motor according to the driving state data; determining target rotation speed information of an output motor according to the running state data; controlling the input motor to work according to the target torque information, and controlling the output motor to work according to the target rotating speed information so as to carry out a durability experiment on the hydraulic torque converter to be tested, which is arranged on the test bench; according to experimental data acquired in the endurance test process, an experimental result of the hydraulic torque converter to be tested is obtained, an engine in an actual vehicle is simulated through a control input motor, a driving wheel in the actual vehicle is simulated through a control output motor, and endurance tests are carried out on the working state of the hydraulic torque converter to be tested between the input motor and the output motor, so that various parameters obtained in the endurance tests are more similar to the situation under the actual working condition, and the accuracy of the experimental result is improved.
In some embodiments, the travel state data includes accelerator opening, engine speed, transmission operating information; the determining the target torque information of the input motor according to the driving state data comprises the following steps: determining initial torque information from a preset engine working characteristic table according to the accelerator opening and the engine rotating speed; and adjusting the initial torque according to the working information of the transmission to obtain the target torque information.
As described above, the input motor is used to simulate torque provided by an engine in a real vehicle. And according to the accelerator opening and the engine speed recorded in the driving state data, looking up a table from a preset engine working characteristic table to obtain initial torque information. The preset engine working characteristic table records corresponding torques of the engine under different throttle opening degrees and different rotating speeds. The final output torque of the engine is also related to torque limiting and torque reducing requests sent by the automatic transmission control unit (Transmission Control Unit, TCU) during actual travel of the vehicle. Therefore, the initial torque is adjusted according to the working information of the transmission, and the initial torque is adjusted by comprehensively considering the torque limiting request and the torque reducing request of the TCU, so that the final torque information of the engine is obtained as target torque information.
In some embodiments, the travel state data includes drive wheel torque, total vehicle resistance; the determining the target rotation speed information of the output motor according to the running state data comprises the following steps: calculating speed information of the vehicle according to the torque of the driving wheels and the total resistance of the vehicle; and determining the control rotation speed of the driving wheel as the target rotation speed information according to the speed information of the vehicle.
Among them, the total vehicle resistance includes, but is not limited to: braking force, friction resistance, ramp resistance, air resistance, and the like. In the actual working condition, the torque of the driving wheels is obtained through a torque sensor arranged at the wheel end to calculate the driving force of the vehicle, the total power of the vehicle is obtained according to the difference between the driving force and the total resistance of the vehicle, and the total power of the vehicle is calculated according to an acceleration calculation formulaCalculating the addition of vehiclesSpeed information, wherein->For the total power of the vehicle, < > for>For vehicle mass>The acceleration information of the vehicle is acceleration of the vehicle at each moment in time, which is acceleration of the vehicle at a certain moment in time. And calculating the speed information of the vehicle according to the acceleration information of the vehicle and the movement time of the vehicle. Alternatively, the speed information of the vehicle may be directly acquired by a speed sensor mounted on the vehicle.
Further, the control rotation speed of the drive wheels is obtained as the target rotation speed information from a conversion relation between the vehicle speed and the wheel rotation speed (vehicle speed=wheel circumference×wheel rotation speed).
According to the embodiment of the disclosure, the target torque information of the input motor and the target rotating speed information of the output motor are determined by acquiring the running state data in the running process of the actual vehicle, so that the working conditions simulated by the input motor and the output motor in the endurance test process are more matched with the working conditions in the running process of the actual vehicle, further the test result obtained by the endurance test is matched with the actual situation, and the accuracy of the test result is improved.
On the basis of the above embodiment, according to the experimental data collected during the endurance experiment, an experimental result of the torque converter to be tested is obtained, including: calculating the experimental sliding friction work of the hydraulic torque converter to be tested in the endurance test process according to the experimental data acquired in the endurance test process; and comparing the experimental sliding friction work with a design threshold value corresponding to the hydraulic torque converter to be tested, and determining the durability of the hydraulic torque converter to be tested.
Slip work is an important factor affecting the service life of a torque converter. According to the experimental data collected in the endurance test process, the accumulated heat generated by the hydraulic torque converter to be tested in the actual working process of the endurance test can be calculated, namely the sliding friction work of the hydraulic torque converter to be tested.
Specifically, the calculation formula is as follows:
wherein,for experimental sliding friction work of the hydraulic torque converter to be tested, < + >>Is time. />Input speed for torque converter to be tested, < >>Input torque for a torque converter to be tested, +.>For the output speed of the torque converter to be measured, +.>For the torque converter output torque to be measured, +.>For the torque converter slip to be measured, +.>For the actual oil pressure in the sliding stage, < >>For the hydraulic torque converter KP point oil pressure to be measured, the data can be acquired according to sensors arranged at relevant positions on a test bench. />For piston area->For friction coefficient>The number of the friction plates is +.>Is effective radius>For torque converter efficiency to be measured, these data can be obtained from the design parameters of the torque converter to be measured.
The design threshold value corresponding to the hydraulic torque converter to be tested is the design value of accumulated friction work which can be born by the hydraulic torque converter to be tested. According to the formula, the experimental sliding friction work of the hydraulic torque converter to be tested in the single endurance experiment process under the given preset working condition can be calculated. Combining the design threshold value corresponding to the hydraulic torque converter to be tested, namely obtaining the number of times that the hydraulic torque converter to be tested can carry out endurance experiments under given preset working conditions within the range of the design threshold value, namely obtaining the durability of the hydraulic torque converter to be tested.
According to the embodiment of the disclosure, the sliding friction work generated by the hydraulic torque converter to be tested in the actual working process of the endurance test is compared with the design threshold value, so that the endurance of the hydraulic torque converter to be tested can be intuitively obtained, the efficiency of the endurance test is improved, the development period is shortened, and the development cost is reduced.
In some embodiments, the driving state data further includes an actual sliding friction work, and the experimental sliding friction work and the actual sliding friction work are compared to determine a similarity between the experimental working condition where the endurance experiment is located and the preset working condition.
According to the similarity between the actual sliding friction work generated by the hydraulic torque converter to be tested in the real road experiment process under the preset working condition and the experimental sliding friction work calculated according to the formula, the similarity between the experimental working condition simulated by the test bench and the preset working condition can be further achieved. When the experimental sliding friction work is closer to the actual sliding friction work, the similarity between the experimental working condition and the preset working condition is higher; correspondingly, the larger the difference between the experimental sliding friction work and the actual sliding friction work is, the lower the similarity between the experimental working condition and the preset working condition is. According to the similarity between the experimental working condition and the preset working condition, the test bench and corresponding control parameters are adjusted, so that the experimental working condition simulated by the test bench is more similar to the preset working condition, and the accuracy of the endurance experiment test result is further improved. Or the similarity between the experimental working condition of the endurance test and the preset working condition can reflect the credibility of the experimental result of the endurance test.
In some embodiments, the severity of damage to the structure of the torque converter under different conditions may also be determined according to different actual sliding friction work generated by the torque converter under different conditions in the endurance experiment. The greater the actual sliding friction work, the greater the damage severity of the working condition to the structure of the hydraulic torque converter to be tested; the smaller the actual sliding friction work, the smaller the damage severity of the working condition to the structure of the hydraulic torque converter to be tested.
On the basis of the foregoing embodiment, the determining, based on the actual condition data obtained by the real-lane road test, the driving state data of the vehicle under the preset condition includes: preprocessing the actual working condition data to obtain processed actual working condition data; and determining the running state data of the vehicle under the preset working condition based on the processed actual working condition data.
Specifically, the preprocessing operation is performed on the actual working condition data, including at least one of the following: the method comprises the steps of removing actual working condition data when the hydraulic torque converter is not operated, selecting working condition data when the working state change frequency of the hydraulic torque converter is greater than a first preset threshold value, and removing working condition data when the vehicle vibration value is greater than a second preset threshold value.
In order to improve the accuracy of the actual working condition data obtained by the real lane road test, the actual working condition data needs to be preprocessed.
The preprocessing operation may include removing actual operating condition data when the torque converter is not operating. In idle speed, parking and other states, the hydraulic torque converter does not work, so that the analysis of the actual working condition data of the states on the hydraulic torque converter belongs to invalid data and can be removed.
The preprocessing operation may further include selecting operating condition data when the operating state of the torque converter changes frequently more than a first preset threshold. The working state of the hydraulic torque converter comprises an opening state and a locking state, and particularly further comprises different opening degrees under the opening state. The working condition data when the working state change frequency of the hydraulic torque converter is greater than a first preset threshold value is the key data of the analysis of the hydraulic torque converter, and the partial data can be extracted. Correspondingly, when the working state change frequency of the hydraulic torque converter is smaller than or equal to a first preset threshold value, namely the hydraulic torque converter is in a low torque state, no damage is caused to the hydraulic torque converter at the moment, and corresponding actual working condition data can be removed. Specifically, the frequency of the change of the working state of the torque converter may be the number of times of the change of the working state of the torque converter in a certain period of time, or other parameters that may measure the frequency of the change of the working state of the torque converter, which is not limited in the embodiments of the present disclosure.
The preprocessing operation may further include removing the operating condition data when the vehicle vibration value is greater than the second preset threshold. When the vehicle vibration value is larger than the second preset threshold value, the degree of jolt of the vehicle is larger, and the detection accuracy of each sensor on the vehicle may be affected, so that the accuracy of the working condition data when the vehicle vibration value is larger than the second preset threshold value may be affected, for example, abnormal peak values are generated, and the like, and such working condition data may be removed.
According to the embodiment of the disclosure, the actual working condition data is optimized, abnormal values and invalid data in the actual working condition data are removed, key data for analysis of the hydraulic torque converter are selected, so that the accuracy of the running state data of the vehicle under the preset working condition is ensured, and the accuracy of an experimental result obtained by performing a endurance experiment based on the running state data of the vehicle under the preset working condition is further improved.
FIG. 3 is a flow chart of a torque converter durability test method provided by another embodiment of the present disclosure, as shown in FIG. 3, including the steps of:
s301, preprocessing operation is carried out on the actual working condition data, and processed actual working condition data are obtained.
Specifically, the preprocessing operation is performed on the actual working condition data, including at least one of the following: the method comprises the steps of removing actual working condition data when the hydraulic torque converter is not operated, selecting working condition data when the working state change frequency of the hydraulic torque converter is greater than a first preset threshold value, and removing working condition data when the vehicle vibration value is greater than a second preset threshold value.
S302, determining running state data of the vehicle under a preset working condition based on the processed actual working condition data.
S303, determining initial torque information from a preset engine working characteristic table according to the opening degree of an accelerator and the engine speed.
S304, according to the working information of the transmission, the initial torque is adjusted, and the target torque information is obtained.
And S305, calculating the speed information of the vehicle according to the torque of the driving wheels and the total resistance of the vehicle.
S306, determining the control rotation speed of the driving wheel as target rotation speed information according to the speed information of the vehicle.
S307, controlling the input motor to work according to the target torque information, and controlling the output motor to work according to the target rotating speed information so as to carry out endurance test on the hydraulic torque converter to be tested which is arranged on the test bench.
S308, calculating the experimental sliding friction work of the hydraulic torque converter to be tested in the endurance test process according to the experimental data acquired in the endurance test process.
S309, comparing the experimental sliding friction work with a design threshold value corresponding to the hydraulic torque converter to be tested, and determining the durability of the hydraulic torque converter to be tested.
S310, comparing the experimental sliding friction work with the actual sliding friction work, and determining the similarity between the experimental working condition of the endurance experiment and the preset working condition.
According to the embodiment of the disclosure, the input motor is controlled to simulate the engine in the actual vehicle, the output motor is controlled to simulate the driving wheel in the actual vehicle, and the durability experiment is carried out on the working state of the hydraulic torque converter to be tested between the input motor and the output motor in the actual vehicle, so that various parameters obtained in the durability experiment are more approximate to the situation under the actual working condition, and the accuracy of the experimental result is improved.
Meanwhile, the sliding friction work generated by the hydraulic torque converter to be tested in the actual working process of the endurance test is compared with the design threshold value, so that the endurance of the hydraulic torque converter to be tested can be intuitively obtained, the efficiency of the endurance test is improved, the development period is shortened, and the development cost is reduced.
In addition, through optimizing the actual working condition data, abnormal values and invalid data in the actual working condition data are removed, key data for analysis of the hydraulic torque converter are selected, so that accuracy of running state data of the vehicle under the preset working condition is guaranteed, and accuracy of experimental results obtained by conducting endurance experiments based on the running state data of the vehicle under the preset working condition is further improved.
Fig. 4 is a schematic structural diagram of a torque converter durability test apparatus provided in an embodiment of the present disclosure. The torque converter durability test apparatus may be a stand control system as described in the above embodiments, or the torque converter durability test apparatus may be a component or assembly in the stand control system. The torque converter durability test apparatus provided by the embodiment of the present disclosure may perform the processing flow provided by the torque converter durability test method embodiment, as shown in fig. 4, the torque converter durability test apparatus 40 includes: a first determination module 41, a second determination module 42, a third determination module 43, a control module 44, a fourth determination module 45; the first determining module 41 is configured to determine driving state data of the vehicle under a preset working condition based on actual working condition data obtained by a real lane road test; the second determining module 42 is configured to determine target torque information of the input motor according to the driving state data; the third determining module 43 is configured to determine target rotation speed information of the output motor according to the driving state data; the control module 44 is configured to control the input motor to operate according to the target torque information, and control the output motor to operate according to the target rotation speed information, so as to perform a endurance experiment on the torque converter to be tested mounted on the test bench; the fourth determining module 45 is configured to obtain an experimental result of the torque converter to be tested according to the experimental data collected during the endurance experiment.
Optionally, the driving state data comprise accelerator opening, engine speed and transmission working information; the second determining module 42 is configured to determine initial torque information from a preset engine operating characteristic table according to the accelerator opening and the engine speed; and adjusting the initial torque according to the working information of the transmission to obtain the target torque information.
Optionally, the driving state data includes driving wheel torque and total vehicle resistance; the third determining module 43 is configured to calculate speed information of the vehicle according to the driving wheel torque and the total vehicle resistance; and determining the control rotation speed of the driving wheel as the target rotation speed information according to the speed information of the vehicle.
Optionally, the fourth determining module 45 includes a calculating unit 451, a comparing unit 452; the calculating unit 451 is configured to calculate an experimental sliding friction work of the torque converter to be tested in the endurance test process according to the experimental data collected in the endurance test process; the comparison unit 452 is configured to compare the experimental sliding friction work with a design threshold corresponding to the torque converter to be tested, and determine the durability of the torque converter to be tested.
Optionally, the driving state data further includes an actual sliding and friction work, and the comparing unit 452 is further configured to compare the experimental sliding and friction work with the actual sliding and friction work, and determine a similarity between the experimental working condition where the endurance experiment is located and the preset working condition.
Optionally, the first determining module 41 includes a preprocessing unit 411 and a determining unit 412; the preprocessing unit 411 is configured to perform a preprocessing operation on the actual working condition data, so as to obtain processed actual working condition data; the determining unit 412 is configured to determine driving status data of the vehicle under the preset working condition based on the processed actual working condition data.
Optionally, the preprocessing operation for the actual working condition data includes at least one of the following: the method comprises the steps of removing actual working condition data when the hydraulic torque converter is not operated, selecting working condition data when the working state change frequency of the hydraulic torque converter is greater than a first preset threshold value, and removing working condition data when the vehicle vibration value is greater than a second preset threshold value.
The torque converter endurance test apparatus of the embodiment shown in fig. 4 may be used to implement the technical solution of the above method embodiment, and its implementation principle and technical effects are similar, and will not be described herein again.
Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure. The electronic device provided in the embodiment of the present disclosure may execute the processing flow provided in the embodiment of the torque converter durability test method, as shown in fig. 5, the electronic device 50 includes: memory 51, processor 52, computer programs and communication interface 53; wherein a computer program is stored in the memory 51 and configured to be executed by the processor 52 for the torque converter durability test method as described above.
In addition, the embodiment of the present disclosure also provides a computer-readable storage medium having stored thereon a computer program that is executed by a processor to implement the torque converter durability test method described in the above embodiment.
Further, embodiments of the present disclosure provide a computer program product comprising a computer program or instructions which, when executed by a processor, implements a torque converter durability test method as described above.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely a specific embodiment of the disclosure to enable one skilled in the art to understand or practice the disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown and described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A torque converter durability test method, wherein the method is applied to a test bench including an input motor and a plurality of output motors, the method comprising:
determining running state data of the vehicle under a preset working condition based on the actual working condition data obtained by the real lane road test;
determining target torque information of an input motor according to the driving state data;
determining target rotation speed information of an output motor according to the running state data;
controlling the input motor to work according to the target torque information, and controlling the output motor to work according to the target rotating speed information so as to carry out a durability experiment on the hydraulic torque converter to be tested, which is arranged on the test bench;
according to the experimental data acquired in the endurance experiment process, an experimental result of the hydraulic torque converter to be tested is obtained;
the output motor is used for simulating a driving wheel in the real vehicle;
the determining the target rotation speed information of the output motor according to the running state data comprises the following steps: and determining the rotation speed of the driving wheels of the vehicle under the preset working condition as target rotation speed information according to the running state data.
2. The method of claim 1, wherein the travel state data includes accelerator opening, engine speed, transmission operating information;
the determining the target torque information of the input motor according to the driving state data comprises the following steps:
determining initial torque information from a preset engine working characteristic table according to the accelerator opening and the engine rotating speed;
and adjusting the initial torque according to the working information of the transmission to obtain the target torque information.
3. The method of claim 1, wherein the travel state data includes drive wheel torque, total vehicle resistance;
the determining the target rotation speed information of the output motor according to the running state data comprises the following steps:
calculating speed information of the vehicle according to the torque of the driving wheels and the total resistance of the vehicle;
and determining the control rotation speed of the driving wheel as the target rotation speed information according to the speed information of the vehicle.
4. The method according to claim 1, wherein the obtaining the experimental result of the torque converter to be tested according to the experimental data collected during the endurance experiment includes:
calculating the experimental sliding friction work of the hydraulic torque converter to be tested in the endurance test process according to the experimental data acquired in the endurance test process;
and comparing the experimental sliding friction work with a design threshold value corresponding to the hydraulic torque converter to be tested, and determining the durability of the hydraulic torque converter to be tested.
5. The method of claim 4, wherein the driving status data further comprises actual work on skid;
the method further comprises the steps of:
and comparing the experimental sliding friction work with the actual sliding friction work, and determining the similarity between the experimental working condition of the endurance experiment and the preset working condition.
6. The method according to claim 1, wherein the determining the driving state data of the vehicle under the preset condition based on the actual condition data obtained by the real lane road test includes:
preprocessing the actual working condition data to obtain processed actual working condition data;
and determining the running state data of the vehicle under the preset working condition based on the processed actual working condition data.
7. The method of claim 6, wherein the preprocessing the actual operating condition data comprises at least one of:
the method comprises the steps of removing actual working condition data when the hydraulic torque converter is not operated, selecting working condition data when the working state change frequency of the hydraulic torque converter is greater than a first preset threshold value, and removing working condition data when the vehicle vibration value is greater than a second preset threshold value.
8. A hydraulic torque converter endurance test device is characterized by comprising:
the first determining module is used for determining running state data of the vehicle under a preset working condition based on the actual working condition data obtained by the real lane road test;
the second determining module is used for determining target torque information of the input motor according to the driving state data;
the third determining module is used for determining target rotating speed information of the output motor according to the running state data;
the control module is used for controlling the input motor to work according to the target torque information and controlling the output motor to work according to the target rotating speed information so as to carry out a durability experiment on the hydraulic torque converter to be tested which is arranged on the test bench;
the fourth determining module is used for obtaining an experimental result of the hydraulic torque converter to be tested according to experimental data acquired in the endurance experiment process;
the output motor is used for simulating a driving wheel in the real vehicle;
the third determining module is specifically configured to determine, according to the driving state data, a rotation speed of the driving wheel of the vehicle under a preset working condition as target rotation speed information.
9. An electronic device, comprising:
a memory;
a processor; and
a computer program;
wherein the computer program is stored in the memory and configured to be executed by the processor to implement the method of any of claims 1-7.
10. A computer readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, implements the method according to any of claims 1-7.
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