CN111964905A - Durability testing device and durability testing method for vehicle transmission - Google Patents
Durability testing device and durability testing method for vehicle transmission Download PDFInfo
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Abstract
The disclosure is applicable to the technical field of vehicle testing, and provides a durability testing device and a durability testing method for a vehicle transmission. According to the method, a test bench is built, an upper computer determines a durability test mode of a transmission according to test data of a whole vehicle and then feeds the durability test mode back to a control cabinet in the test bench, the control cabinet controls each motor and a transmission gear-shifting control system in the test bench to drive the transmission according to the durability test mode, so that the transmission works in the durability test mode, meanwhile, a rotating speed torque sensor and a vibration sensor in the test bench monitor the torque, rotating speed and vibration states of the transmission in the durability test process, and the monitored results are fed back to the upper computer through the control cabinet, so that the upper computer judges the durability of the transmission through the monitored results and outputs the judged results.
Description
Technical Field
The disclosure belongs to the technical field of vehicle testing, and particularly relates to a durability testing device and a durability testing method for a vehicle transmission.
Background
As a transportation tool that is closely related to people's lives, a vehicle must be subjected to various safety tests, such as a transmission endurance test, before it leaves a factory. At present, the existing vehicle transmission durability test method is mainly carried out by driving a vehicle by a special person for thirty-thousand to fifty-thousand kilometers, and a driving site needs a special site.
Although the method can be used for testing the durability of the transmission of the vehicle, the method needs to be carried out in a special test field, and the test course is long, the test duration is long, and further the test efficiency is reduced; in addition, the method needs manual operation of a driver, and the consistency of test results cannot be ensured due to different operation habits of different drivers.
Therefore, it is necessary to provide a technical solution to solve the above technical problems.
Disclosure of Invention
In view of this, the embodiment of the present disclosure provides a durability testing apparatus for a vehicle transmission and a durability testing method thereof, which can solve the problems of limited test site, low efficiency and poor experimental consistency of the existing durability testing method for the vehicle transmission.
The first aspect of the disclosed embodiment provides a durability testing device of a vehicle transmission, the durability testing device comprises a testing rack and an upper computer, the testing rack comprises a control cabinet, a rack body, a transmission gear-shifting controller system, a dual-mass flywheel, an input motor, an input rotating speed torque sensor, a transmission mounting bracket, an output motor and an output rotating speed torque sensor, the input motor is fixed on the rack body, the input motor is connected with the input rotating speed torque sensor, the input rotating speed torque sensor is connected with the transmission mounting bracket, the transmission is fixed on the transmission mounting bracket and is connected with the dual-mass flywheel, a vibration sensor is further arranged on the transmission, the output motor is connected with the output rotating speed torque sensor, and the output rotating speed torque sensor is connected with the transmission, the control cabinet is connected with the upper computer, the input motor, the output motor, the input rotating speed torque sensor, the output rotating speed torque sensor, the vibration sensor and the transmission gear-shifting control system;
the upper computer is used for acquiring distribution states of gears, torque, rotating speed and running time according to finished automobile test data, determining an endurance test mode of the transmission according to the distribution states of the gears, the torque, the rotating speed and the running time and feeding the endurance test mode back to the control cabinet, and the control cabinet is used for controlling the input motor, the output motor and the transmission gear-shifting control system to drive the transmission according to the endurance test mode so that the transmission works in the endurance test mode; input rotational speed torque sensor output rotational speed torque sensor is used for right the moment of torsion and the rotational speed of derailleur in endurance test process are monitored, and pass through the moment of torsion and the rotational speed of monitoring the switch board feeds back to the host computer, simultaneously vibration sensor is right the vibration state of derailleur in endurance test process is monitored, and feeds back the monitoring result through the switch board to the host computer, so that the host computer is through moment of torsion, rotational speed and the vibration value of monitoring to the durability of derailleur is judged, and the output judgement result.
A second aspect of the disclosed embodiment provides a durability test method based on the durability test apparatus for a vehicle transmission of the first aspect, the durability test method including:
acquiring distribution states of gears, torque, rotating speed and running time according to the whole vehicle test data, and determining an endurance test mode of the transmission according to the distribution states of the gears, the torque, the rotating speed and the running time;
controlling the input motor, the output motor and the transmission shift control system to drive the transmission according to the endurance test mode so that the transmission operates in the endurance test mode;
and monitoring the torque, the rotating speed and the vibration state of the transmission in the durability test process, judging the durability of the transmission according to the monitored torque, the monitored rotating speed and the monitored vibration value, and outputting a judgment result.
Compared with the prior art, the embodiment of the disclosure has the following beneficial effects: according to the method, a test bench is built, an upper computer determines a durability test mode of a transmission according to test data of a whole vehicle and then feeds the durability test mode back to a control cabinet in the test bench, the control cabinet controls each motor and a transmission gear-shifting control system in the test bench to drive the transmission according to the durability test mode, so that the transmission works in the durability test mode, meanwhile, a rotating speed torque sensor and a vibration sensor in the test bench monitor the torque, rotating speed and vibration states of the transmission in the durability test process, and the monitored results are fed back to the upper computer through the control cabinet, so that the upper computer judges the durability of the transmission through the monitored results and outputs the judged results.
Drawings
To more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and those skilled in the art can also obtain other drawings according to the drawings without inventive labor.
FIG. 1 is a schematic structural diagram of an endurance testing apparatus for a transmission of a vehicle according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of a durability testing apparatus for a vehicle transmission according to a second embodiment of the present disclosure;
FIG. 3 is a schematic structural diagram of a durability testing apparatus for a vehicle transmission according to a third embodiment of the present disclosure;
FIG. 4 is a schematic structural diagram of an endurance testing apparatus for a vehicle transmission according to a fourth embodiment of the present disclosure;
FIG. 5 is a schematic illustration of the speed/torque operating mode of the transmission during a durability test in the durability test apparatus for a vehicle transmission provided in FIGS. 1-4;
fig. 6 is a schematic flowchart of a durability testing method for a vehicle transmission according to a fourth embodiment of the present disclosure.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the disclosed embodiments. However, it will be apparent to one skilled in the art that the present disclosure may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present disclosure with unnecessary detail.
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are some, but not all embodiments of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the disclosure herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in the specification of the present disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this disclosure and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
In order to explain the technical solution of the present disclosure, the following description is given by way of specific examples.
Fig. 1 shows a durability testing apparatus for a vehicle transmission provided in a first embodiment of the present disclosure, and for convenience of description, only the parts related to the present embodiment are shown, and detailed description is as follows:
as shown in fig. 1, the endurance testing apparatus includes a testing stage 1 and an upper computer 2. The test bench 1 comprises a control cabinet 10, a bench body 11, a transmission gear-shifting controller system 12, a dual-mass flywheel 13, an input motor 15, an input rotating speed torque sensor 17, a transmission mounting bracket 18, an output motor 19 and an output rotating speed torque sensor 20, wherein the input motor 15, the input rotating speed torque sensor 17, the transmission mounting bracket 18, the output motor 19 and the output rotating speed torque sensor 20 are fixed on the bench body 11. The input motor 15 is connected with the input rotating speed torque sensor 17, the input rotating speed torque sensor 17 is connected with the transmission mounting bracket 18, the transmission 25 is fixed on the transmission mounting bracket 18 and is connected with the dual-mass flywheel 13, the transmission 25 is further provided with a vibration sensor 251, the output motor 19 is connected with the output rotating speed torque sensor 20, the output rotating speed torque sensor 20 is connected with the transmission 25, and the control cabinet 10 is connected with the upper computer 2, the input motor 15, the output motor 19, the input rotating speed torque sensor 17, the output rotating speed torque sensor 20, the vibration sensor 251 and the transmission gear-shifting control system 12.
Specifically, the upper computer 2 is configured to obtain distribution states of gears, torque, rotation speed and operation time according to the entire vehicle test data, determine an endurance test mode of the transmission 25 according to the distribution states of the gears, the torque, the rotation speed and the operation time, and feed back the endurance test mode to the control cabinet 10, where the control cabinet 10 is configured to control the input motor 15, the output motor 19 and the transmission shift control system 12 to drive the transmission 25 according to the endurance test mode, so that the transmission 25 operates in the endurance test mode; the input rotating speed torque sensor 17 and the output rotating speed torque sensor 20 are used for monitoring the torque and the rotating speed of the transmission 25 in the endurance test process, and feeding the monitored torque and the monitored rotating speed back to the upper computer 2 through the control cabinet 10, meanwhile, the vibration sensor 251 is used for monitoring the vibration state of the transmission 25 in the endurance test process, and feeding the monitoring result back to the upper computer 2 through the control cabinet 10, so that the upper computer 2 can judge the durability of the transmission 25 through the monitored torque, rotating speed and vibration value, and output the judging result.
In specific implementation, in the embodiment of the present disclosure, the vehicle test data is recorded when vehicle tests of high-strength endurance, driving endurance, transmission accelerated fatigue, comprehensive endurance, and the like are performed on vehicles of the same type or similar types. When the transmission endurance test needs to be performed on a new vehicle, the whole vehicle test data performed on the same type or similar type of vehicles can be used as a historical data basis, so that the new vehicle needing the transmission endurance test can be subjected to the endurance test according to the historical data.
Specifically, according to the present disclosure, after the transmission endurance test bench shown in fig. 1 is built, the upper computer 2 is used for obtaining distribution states of gears, torque, rotation speed and operation time according to the whole vehicle test data, determining an endurance test mode of the transmission and feeding back the determined endurance test mode to the control cabinet 10, so that the control cabinet controls the input motor 15, the output motor 19 and the transmission gear shift control system to drive the transmission 25 according to the endurance test mode, thereby implementing an endurance test on the transmission 25, and in the endurance test process of the transmission 25, the input rotation speed torque sensor 17, the output rotation speed torque sensor 20 and the vibration sensor 251 monitor torque, rotation speed and vibration values of the transmission 25 and feed back the monitored torque, rotation speed and vibration values to the upper computer 2 through the control cabinet 10, so that the upper computer 2 can conveniently monitor the torque, rotation speed and vibration values through the monitored torque, The rotation speed and the vibration value determine the durability of the transmission 25, and output the determination result, that is, the transmission 25 passes or fails the durability test.
In this embodiment, according to the method, a test bench is built, so that an upper computer determines an endurance test mode of a transmission according to acquired test data of a whole vehicle and then feeds the endurance test mode back to a control cabinet in the test bench, the control cabinet controls each motor and a transmission gear-shifting control system in the test bench to drive the transmission according to the endurance test mode, so that the transmission works in the endurance test mode, meanwhile, a rotating speed torque sensor and a vibration sensor in the test bench monitor torque, rotating speed and vibration states of the transmission in the endurance test process, and the monitored results are fed back to the upper computer through the control cabinet, so that the upper computer can judge the endurance of the transmission through the monitored results and output the judged results The method has the advantages of high efficiency and high test result consistency.
Further, as an embodiment of the present disclosure, as shown in fig. 2, the endurance testing apparatus further includes: an input drive shaft 140, an output drive shaft 14, and an input connector 16 and an output connector 21 fixed to the gantry body 11.
Wherein the input motor 15, the input connection member 16, the input rotational speed torque sensor 17 and the transmission mounting bracket 18 are connected by an input drive shaft 140, the output motor 19, the output connection member 21 and the output rotational speed torque sensor 20 are connected by an output drive shaft 14, and the output connection member 21 is connected with the transmission 25 by the output drive shaft 14.
In the embodiment of the disclosure, by arranging the input transmission shaft 140, the output transmission shaft 14, the input connecting piece 16 and the output connecting piece 21 on the test bench 1, the input transmission shaft 140 and the input connecting piece 16 can connect the input motor 15 with the input rotating speed torque sensor 17, and the output transmission shaft 14 and the output connecting piece 21 can connect the output motor 19 with the output rotating speed torque sensor 20, so as to facilitate simulating the working conditions of the real vehicle.
Further, as an embodiment of the present disclosure, as shown in fig. 2, the output transmission shaft 14 includes a first output transmission shaft 141 and a second output transmission shaft 142, the output motor 19 includes a first output motor 191 and a second output motor 192, the output rotational speed torque sensor 20 includes a first output rotational speed torque sensor 201 and a second output rotational speed torque sensor 202, and the output connector 21 includes a first output connector 211 and a second output connector 212; the first output motor 191, the first output connector 211 and the first output rotational speed torque sensor 201 are connected through a first output transmission shaft 141, the first output connector 211 is connected with the transmission 25 through the first output transmission shaft 141, the second output motor 192, the second output connector 212 and the second output rotational speed torque sensor 202 are connected through a second output transmission shaft 142, the second output connector 212 is connected with the transmission 25 through the second output transmission shaft 142, and the first output motor 191, the second output motor 192, the first output rotational speed torque sensor 201 and the second output rotational speed torque sensor 202 are all connected with the control cabinet 10.
In specific implementation, based on the endurance testing apparatus shown in fig. 2, after the control cabinet 10 receives the endurance testing mode of the transmission 25 fed back by the upper computer 2, the control cabinet 10 is configured to control the input motor 15, the first output motor 191, the second output motor 192, and the transmission shift control system 12 to drive the transmission 25 according to the endurance testing mode, so that the transmission 25 operates in the endurance testing mode; the input rotating speed torque sensor 17, the first output rotating speed torque sensor 201 and the second output rotating speed torque sensor 202 are used for monitoring the torque and the rotating speed of the transmission 25 in the endurance test process, the monitored torque and the monitored rotating speed are fed back to the upper computer 2 through the control cabinet 10, meanwhile, the vibration sensor 251 monitors the vibration state of the transmission 25 in the endurance test process, and the monitoring result is fed back to the upper computer 2 through the control cabinet 10, so that the upper computer 2 can judge the endurance of the transmission 25 through the monitored torque, the monitored rotating speed and the monitored vibration value, and output the judging result.
It should be noted that, in the embodiment of the present disclosure, the endurance testing apparatus may include two output motors, or only have one output motor, and only two output motors are taken as an example in the embodiment; similarly, the output transmission shaft, the output rotational speed torque sensor, the output connecting member, and the like may be implemented by one, and in this embodiment, only two are described as an example, and the present invention is not limited thereto.
In the embodiment, two output motors and two output rotating speed torque sensors are arranged in the durability testing device of the vehicle transmission, so that when the durability testing device works, if any one of the two motors or the two output rotating speed torque sensors fails, the durability test of the vehicle transmission can still be normally carried out, the testing efficiency is improved, and when the two motors or the two output rotating speed torque sensors have no failure, the accuracy in the durability test process can be effectively improved.
Further, as an embodiment of the present disclosure, as shown in fig. 3, the input connector 16 includes an input coupling 160 and an input bearing seat 161. The input coupling 160 is connected between the input motor 15 and the input rotational speed torque sensor 17 via the input transmission shaft 140, and the input bearing block 161 is connected between the input rotational speed torque sensor 17 and the transmission mounting bracket 18 via the input transmission shaft 140.
In the embodiment of the present disclosure, the input coupling 160 may connect the input motor 15 and the input rotational speed and torque sensor 17, and the input bearing seat 161 may connect the input rotational speed and torque sensor 17 and the transmission mounting bracket 18 by providing the input connecting member 16 including the input coupling 160 and the input bearing seat 161 on the test bench 1, so as to facilitate simulating the real vehicle working condition.
Further, as an embodiment of the present disclosure, as shown in fig. 3, the first output connection 211 includes a first output coupling 211a and a first output bearing seat 211b, the first output coupling 211a is connected between the first output motor 191 and the first output rotational speed and torque sensor 201 through a first output transmission shaft 141, and the first output bearing seat 211b is connected between the first output rotational speed and torque sensor 201 and the transmission 25 through the first output transmission shaft 141.
In the embodiment of the present disclosure, by providing the first output connection member 211 comprising the first output coupling 211a and the first output bearing seat 211b on the test bench 1, the first output coupling 211a can connect the first output motor 191 with the first output rotational speed and torque sensor 201, and the first output bearing seat 211b can connect the first output rotational speed and torque sensor 201 with the transmission 25, so that the first output motor 191 can effectively drive the transmission 25 to work and is beneficial to simulating the working conditions of the real vehicle.
Further, as an embodiment of the present disclosure, as shown in fig. 3, the second output connection member 212 includes a second output coupling 212a and a second output bearing seat 212b, the second output coupling 212a is connected between the second output motor 192 and the second output rotational speed and torque sensor 202 through the second output transmission shaft 142, and the second output bearing seat 212b is connected between the second output rotational speed and torque sensor 202 and the transmission mounting bracket 18 through the second output transmission shaft 142.
In the embodiment of the present disclosure, by providing the second output connection member 212 including the second output coupling 212a and the second output bearing seat 212b on the test bench 1, the second output coupling 212a can connect the second output speed and torque sensor 202 with the transmission mounting bracket 18, and the second output bearing seat 212b can connect the second output speed and torque sensor 202 with the second output motor 192, so that the second output motor 192 can effectively drive the transmission 25 to work and is beneficial to simulating the working conditions of the real vehicle.
Further, as a specific embodiment of the present disclosure, when the transmission 25 is subjected to the endurance test, the upper computer 2 is specifically configured to:
acquiring the maximum rotating speed, the minimum rotating speed, the maximum torque and the minimum torque of the vehicle under each gear, the change time of the maximum rotating speed and the minimum rotating speed of the vehicle under each gear, the change time of the maximum torque and the minimum torque of the vehicle under each gear, the cycle times and the operating time of each gear in each cycle process according to the distribution state of the gears, the torque, the rotating speed and the operating time;
determining a change rule of the rotating speed of each gear according to the maximum rotating speed and the minimum rotating speed of the vehicle under each gear and the change time of the maximum rotating speed and the minimum rotating speed of the vehicle under each gear, and determining a change rule of the torque under each gear according to the maximum torque and the minimum torque of the vehicle under each gear and the change time of the maximum torque and the minimum torque of the vehicle under each gear;
determining a rotating speed operation mode under each gear and a torque operation mode under each gear according to the change rule of the rotating speed under each gear and the change rule of the torque under each gear respectively;
and determining the durability test mode of the transmission according to the rotating speed operation mode of each gear, the torque operation mode of each gear, the circulation times and the operation time of each gear in each circulation process.
In specific implementation, after the upper computer 2 performs statistical analysis on the whole vehicle test data to obtain the distribution states of the gears, the torques, the rotating speeds and the operating time, the upper computer 2 can obtain the maximum rotating speed N of the vehicle at each gear according to the obtained distribution states of the gears, the torques, the rotating speeds and the operating timeimaxMinimum rotational speed NiminMaximum torque TimaxMinimum torque TiminMaximum rotating speed N of the vehicle under each gearimaxAnd a minimum rotational speed NiminTime of change Δ t of1iMaximum torque T of vehicle at each gearimaxWith a minimum torque TiminTime of change Δ t of2iOperating time t of each geariAnd the number of cycles N.
Specifically, when the rotating speed distribution state acquired by the upper computer 2 indicates that the vehicle only has one driving time at a certain gear, the upper computer 2 records the maximum rotating speed of the vehicle at the gear within the time as NimaxAnd recording the minimum rotating speed of the vehicle at the gear as NiminAnd recording the time of change between the two as Δ t1iAnd recording the running time of the vehicle in the gear as tiAfter the total running time of the vehicle at the gear is obtained, the upper computer 2 can determine the cycle number N according to the total running time, and further determine the running time t of the gear in each cycle according to the cycle N and the total running time of the gear at the momenti。
When the rotating speed distribution state obtained by the upper computer 2 shows that the vehicle is under a certain gearWhen the running time is divided into several periods of time at intervals, the upper computer 2 calculates the average value of the maximum rotating speed of the vehicle in each period of time under the gear to obtain a rotating speed record NimaxThe rotating speed obtained by carrying out average calculation on the minimum rotating speed of the vehicle in each period of time under the gear is recorded as NiminAnd recording the result obtained by calculating the mean value of the difference value between the maximum rotating speed and the minimum rotating speed of the vehicle in each period of time under the gear as delta t1iAnd recording the total running time of the vehicle in the gear as the total running time of the gear, after the total running time of the vehicle in the gear is obtained, the upper computer 2 can determine the cycle number N according to the total running time, and further determine the running time t of the gear in each cycle according to the cycle N and the total running time of the gear at the momenti。
It should be noted that, in the embodiment of the present disclosure, the maximum torque T of the vehicle in each gear position isimaxMinimum torque TiminMaximum torque TimaxWith a minimum torque TiminTime of change Δ t of2iAnd the maximum rotating speed N of the vehicle under each gearimaxMinimum rotational speed NiminMaximum rotational speed NimaxAnd minimum speed NiminTime of change Δ t of1iThe obtaining process is the same, and the maximum rotating speed N of the vehicle under each gear can be referred to specificallyimaxMinimum rotational speed NiminMaximum rotational speed NimaxAnd minimum speed NiminTime of change Δ t of1iThe obtaining process is not described herein.
Further, when the upper computer obtains the maximum rotating speed N of the vehicle under each gearimaxMinimum rotational speed NiminMaximum torque TimaxMinimum torque TiminMaximum rotating speed N of the vehicle under each gearimaxAnd a minimum rotational speed NiminTime of change Δ t of1iMaximum torque T of vehicle at each gearimaxWith a minimum torque TiminTime of change Δ t of2iThen, the upper computer 2 can rotate at the maximum speed N according to the gear positionsimaxMinimum rotational speed NiminAnd each gearMaximum speed N of the vehicleimaxAnd minimum speed NiminTime of change Δ t of1iDetermining the change rule of the rotating speed under each gear and according to the maximum torque T of the vehicle under each gearimaxMinimum torque TiminAnd the maximum torque T of the vehicle in each gearimaxWith a minimum torque TiminTime of change Δ t of2iAnd determining the change rule of the torque under each gear.
Specifically, the upper computer 2 can determine a change rule of the rotation speed from the minimum to the maximum at a certain gear i according to the following formula (1):
and confirming a change rule of the rotating speed from maximum to minimum under a certain gear i according to the following formula (2):
and confirming a change rule of the torque from the minimum to the maximum at a certain gear i according to the following formula (3):
and confirming a change rule of the torque from maximum to minimum in a certain gear i according to the following formula (4):
after the upper computer 2 confirms the change rule of the rotating speed and the change rule of the torque under each gear according to the above formula (1), formula (2), formula (3) and formula (4), the upper computer 2 can determine the rotating speed operation mode under each gear and the torque operation mode under each gear according to the change rule of the rotating speed and the change rule of the torque under each gear, and the curve schematic diagram of the rotating speed operation mode under each gear and the torque operation mode under each gear refers to fig. 5.
After the upper computer 2 determines the rotating speed operation mode and the torque operation mode under each gear, the upper computer 2 can determine the endurance test mode of the transmission according to the rotating speed operation mode under each gear, the torque operation mode under each gear, the operation time of each gear in each circulation process and the circulation times, and send the endurance test mode to the control cabinet 10, so that the control cabinet 10 can conveniently carry out the endurance test on the transmission 25 according to the endurance test mode; it should be noted that, in the embodiment of the present disclosure, the endurance test mode includes the maximum rotation speed N of the vehicle in the i-rangeimaxMinimum rotational speed NiminMaximum torque TimaxMinimum torque TiminThe running time of each gear in each cycle and the cycle number N.
Further, after the control cabinet 10 receives the endurance test mode of the transmission sent by the upper computer 2, the control cabinet 10 specifically performs the following operations:
controlling the transmission shift control system 12 to operate in the 1 gear according to the endurance test mode, such that the transmission shift control system 12 controls the transmission 25 to operate in the 1 gear;
under the condition that the transmission 25 works in the 1 gear, controlling the input motor 15, the first output motor 191 and the second output motor 192 to operate according to the 1-gear speed-down running mode, the 1-gear torque running mode and the running time of the 1 gear in the first cycle so as to carry out a first 1-gear endurance test on the transmission 25;
obtaining a first 1-gear durability test result of the transmission 25, if the first 1-gear durability test result of the transmission 25 is qualified, controlling the transmission gear-shifting control system 12 to work at a 2-gear, and performing a first 2-gear durability test on the transmission 25 according to a first 1-gear durability test mode until the transmission 25 completes the first durability test of all gears;
when the first endurance test results of the transmission 25 in all gears are qualified, the input motor 15, the first output motor 191, the second output motor 192 and the transmission gear-shifting control system 12 are controlled to drive the transmission to perform the second endurance test in all gears until the number of endurance tests of the transmission 25 in all gears reaches the cycle number N.
Further, as an embodiment of the present disclosure, the control cabinet 10 is further specifically configured to: after the current gear durability test of the transmission 25 is finished and before the next gear durability test, the input torque of the transmission 25 is controlled to be reduced to zero, and then the input rotation speed of the transmission 25 is controlled to be reduced to idle speed and then the current gear is exited.
In the embodiment of the present disclosure, after the endurance test in the current gear is completed and before the endurance test in the next gear is performed, after the input torque of the transmission 25 is controlled to be zero, the input rotation speed of the transmission 25 is controlled to drop to the idle speed and then the current gear is exited, so that the endurance test in the current gear cannot affect the endurance test in the next gear, and the accuracy in the endurance test process of the transmission can be effectively improved.
Further, as an embodiment of the present disclosure, the control cabinet 10 is further specifically configured to control the input motor 15, the first output motor 191, and the second output motor 192 to drive the transmission 25 to operate in a preset state where the rotation speed is a preset rotation speed and the torque is a preset torque, and to control the transmission 25 to be in-gear for a first preset time in all forward gears and to be in-gear for a second preset time in all reverse gears in the preset state before the transmission 25 is subjected to the endurance test.
In specific implementation, the preset torque, the first preset time and the second preset time can be set as required, and in the embodiment of the disclosure, the preferable preset torque is 0.5NpThe preset torque is 0.5TeThe first preset time is 1 hour, the second preset time is 0.5 hour, wherein N ispIs the maximum power speed, T, of the engineeA maximum design torque for the transmission; it should be noted that, the values of the preset torque, the first preset time and the second preset time are only an example, and the values are not limited to the preset torque, the first preset time and the second preset timeThe set time and the second preset time cause a limit.
In the embodiment of the disclosure, before the endurance test is performed on the transmission, the input motor 15, the first output motor 191 and the second output motor 192 are controlled to drive the transmission to operate in the preset state that the rotating speed is the preset rotating speed and the torque is the preset torque, and the transmission is controlled to run in for the first preset time in all forward gears and to run in for the second preset time in all reverse gears in the preset state, so that the transmission can complete the running-in test before the formal endurance test, and therefore, the influence of small flaws generated in the manufacturing process of the transmission on the endurance test of the transmission can be eliminated, and the accuracy of the endurance test of the transmission is improved.
The principle of the durability test apparatus for a vehicle transmission of the present disclosure will be specifically described below by taking a specific application process as an example, and detailed as follows:
firstly, after the control cabinet 10 receives a transmission endurance test mode sent by the upper computer 2, the control cabinet 10 controls the transmission 25 to carry out endurance test by adopting a method of inputting motor control torque and outputting motor control rotating speed, and the input motor and the output motor are both motors with better dynamic response characteristics, so that the change of the running modes of the torque and the rotating speed can be effectively realized; it should be noted that in the embodiment of the present disclosure, the durability test of the transmission 25 may also be performed by using a method of controlling the torque of the output motor and controlling the rotation speed of the input motor, and the present disclosure is not limited specifically.
Secondly, assume the maximum power speed of the engine to be NpThe transmission is designed to have a maximum torque of TeIn this case, the control cabinet 10 can control the rotation speed of the first output motor 191 and the second output motor 192 to be 0.5NpI (i is the gear ratio of each gear), and controls the input torque of the input motor 15 to be 0.5TeAnd in this state, the transmission 25 is controlled to be in running-in for 1h in all forward gears and 0.5h in reverse gears, so that the running-in test of the transmission 25 is completed.
After the running-in test is performed on the transmission 25, the control cabinet 10 will perform a formal endurance test on the transmission. Specifically, the control cabinet 10 controls transmission shift controlThe system 12 is controlled, so that the transmission gear-shifting control system 12 controls the transmission 25 to engage the 1 gear during idling, and then the control cabinet 10 controls the first output motor 191 and the second output motor 192 to firstly increase the rotation speed to the maximum rotation speed N of the 1-gear shifting conditionimaxThen the input motor 15 is controlled to load the minimum torque N of the 1-gear shift conditionimaxThen, the first shift test of the 1 st gear is performed on the transmission 25 according to the operation mode shown in fig. 4, and the operation time is t1, after the durability test of the transmission 25 in the first shift test of the 1 st gear is finished, the control cabinet 10 controls the input motor 15 so that the input motor torque is reduced to zero, and then controls the first output motor 191 and the second output motor 192 so that the input rotation speed of the transmission 25 is shifted out of the 1 st gear after idling.
It should be noted that, in the process of performing the first variable-operating-condition endurance test on the transmission 25 at the 1-gear position, the input rotating speed torque sensor 17, the first output rotating speed torque sensor 201 and the second output rotating speed torque sensor 202 record the input/output rotating speed and the input/output torque in the test process in real time, and send the recorded data to the upper computer 2 through the control cabinet 10, and the vibration sensor 251 monitors the vibration condition of the transmission 25 in the endurance test process, and feeds the monitored vibration result back to the upper computer 2 through the control cabinet 10, so that the upper computer 2 can determine whether the variable-operating-condition endurance test of the transmission at the 1-gear position is qualified, that is, whether the transmission 25 has abnormal conditions such as abnormal sound, breakage, abnormal abrasion and the like in the endurance test process, if the abnormal conditions occur, it is indicated that the endurance test of the transmission 25 is not qualified, if the above abnormal state does not occur, this durability test of the transmission 25 is passed.
After the first 1-gear test of the transmission 25 is finished and the durability test result shows that the transmission 25 is qualified, the control cabinet 10 controls the transmission gear-shifting control system 12 to switch the next gear, and performs the first durability test of the transmission 25 under the 2-gear according to the first durability test mode under the 1-gear until all gears are subjected to single cycle, namely the first durability test of the transmission under all gears is completed; it should be noted that, in this embodiment, the first endurance test process of the transmission in other gears is the same as the first endurance test process of the transmission in the 1 gear, and specifically, reference may be made to a principle of the first endurance test of the transmission in the 1 gear, which is not described herein again.
Further, after completing the endurance test cycle for all gears for the first time, the control cabinet 10 may repeat the endurance test for the transmission according to the endurance test cycle for all gears for the first time, that is, repeat the second and third endurance tests for the transmission for all gears until the repetition number reaches the cycle number; it should be noted that, in the embodiment of the present disclosure, all gears are sequentially operated once for one cycle.
Further, the control cabinet 10 can also set an alarm parameter of the transmission 25 in the endurance test process according to the endurance test mode, and when the monitoring data of the vibration sensor 251, the input rotating speed torque sensor 17, the first output rotating speed torque sensor 201 and the second output rotating speed torque sensor 202 reach the alarm parameter, the control cabinet 10 can feed back to the upper computer 2, so that the upper computer 2 can perform corresponding alarm processing, and the endurance test device is prevented from being damaged or the endurance test of the transmission is performed in a device failure state.
Further, as shown in fig. 4, the durability testing apparatus further includes a cooling system 26, which is connected to the transmission 25 and the control cabinet 10, and is configured to acquire the oil temperature of the transmission 25 during the durability test, feed back the acquired oil temperature to the control cabinet 10, and regulate the oil temperature of the transmission 25 during the durability test under the control of the control cabinet 10, so as to prevent the oil temperature of the transmission 25 from being too high or too low during the durability test, and effectively avoid the transmission 25 from malfunctioning.
In this embodiment, according to the method, a test bench is built, so that an upper computer determines an endurance test mode of a transmission according to acquired whole vehicle test data and then feeds the endurance test mode back to a control cabinet in the test bench, the control cabinet controls each motor and a transmission gear-shifting control system in the test bench to drive the transmission according to the endurance test mode, so that the transmission works in the endurance test mode, meanwhile, a rotating speed torque sensor and a vibration sensor in the test bench monitor torque, rotating speed and vibration states of the transmission in the endurance test process, and feed monitored results back to the upper computer through the control cabinet, so that the upper computer can judge the endurance of the transmission according to the monitored results and output the judged results Low efficiency and poor experimental consistency.
Further, fig. 6 shows a flow of implementing the durability test method for the vehicle transmission according to the fourth embodiment of the present disclosure, and as shown in fig. 6, the durability test method includes:
step S51: and acquiring distribution states of gears, torque, rotating speed and running time according to the test data of the whole vehicle, and determining the endurance test mode of the transmission according to the distribution states of the gears, the torque, the rotating speed and the running time.
In specific implementation, as an embodiment of the present disclosure, step S51 specifically includes:
acquiring the maximum rotating speed, the minimum rotating speed, the maximum torque and the minimum torque of the vehicle under each gear, the change time of the maximum rotating speed and the minimum rotating speed of the vehicle under each gear, the change time of the maximum torque and the minimum torque of the vehicle under each gear, the cycle times and the operating time of each gear in each cycle process according to the distribution state of the gears, the torque, the rotating speed and the operating time;
determining a change rule of the rotating speed of each gear according to the maximum rotating speed and the minimum rotating speed of the vehicle under each gear and the change time of the maximum rotating speed and the minimum rotating speed of the vehicle under each gear, and determining a change rule of the torque under each gear according to the maximum torque and the minimum torque of the vehicle under each gear and the change time of the maximum torque and the minimum torque of the vehicle under each gear;
determining a rotating speed running mode under each gear and a torque running mode under each gear according to the change rule of the rotating speed under each gear and the change rule of the torque under each gear respectively;
and determining the durability test mode of the transmission according to the rotating speed operation mode of each gear, the torque operation mode of each gear, the cycle number and the operation time of each gear in each cycle.
Step S52: controlling the input motor, the output motor, and the transmission shift control system to drive the transmission according to the endurance test mode to operate the transmission in the endurance test mode.
In a specific implementation, as an implementation manner, step S52 specifically includes:
controlling the transmission gear-shifting control system to work in a 1 gear according to the endurance test mode, so that the transmission gear-shifting control system controls the transmission to work in the 1 gear;
under the condition that the transmission works in a 1-gear position, controlling the input motor and the output motor to operate according to a 1-gear-position lower rotating speed operation mode, a 1-gear-position lower torque operation mode and the operation time of the 1-gear position in the first circulation process so as to carry out a first 1-gear-position endurance test on the transmission;
obtaining a first 1-gear durability test result of the transmission, if the first 1-gear durability test result of the transmission is qualified, controlling the transmission gear-shifting control system to work at a 2-gear position, and performing a first 2-gear durability test on the transmission according to a first 1-gear durability test mode until the transmission completes the first durability test of all the gears;
and when the first endurance test results of the transmission in all gears are qualified, controlling the input motor, the output motor and the transmission gear-shifting control system to drive the transmission to perform a second endurance test in all gears until the endurance test times of the transmission in all gears reach the cycle times.
It should be noted that, in the present embodiment, the output motor includes, but is not limited to, a first output motor, a second output motor, or a first output motor and a second output motor.
Further, as an embodiment of the present disclosure, the endurance testing method further includes:
after the current gear endurance test of the transmission is finished and before the next gear endurance test, controlling the input torque of the transmission to be reduced to zero, and controlling the input rotating speed of the transmission to be reduced to idle speed and then exiting the current gear.
Further, as an embodiment of the present disclosure, the endurance testing method further includes:
before the transmission is subjected to the endurance test, the input motor, the first output motor and the second output motor are controlled to drive the transmission to work in a preset state that the rotating speed is a preset rotating speed and the torque is a preset torque, and the transmission is controlled to be in-run for a first preset time under all forward gears and to be in-run for a second preset time under all reverse gears under the preset state.
Further, as an embodiment of the present disclosure, the endurance testing method further includes:
and setting alarm parameters of the transmission in the endurance test process according to the endurance test mode.
Step S53: and monitoring the torque, the rotating speed and the vibration state of the transmission in the durability test process, judging the durability of the transmission according to the monitored torque, the monitored rotating speed and the monitored vibration value, and outputting a judgment result.
It should be noted that, in the embodiment of the present disclosure, since the endurance testing method is implemented based on the endurance testing apparatus shown in fig. 1 to 5, for a specific implementation process of the endurance testing method, reference may be made to the related description of the endurance testing apparatus in fig. 1 to 5, and details are not repeated here.
In this embodiment, the durability test method disclosed by the disclosure is based on a built test bench, determines a durability test mode of a transmission according to acquired test data of a whole vehicle, controls each motor and a transmission shift control system in the test bench to drive the transmission according to the durability test mode, so that the transmission works in the durability test mode, monitors torque, rotating speed and vibration state of the transmission in the durability test process, judges durability of the transmission according to the monitored result, and outputs the judged result.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present disclosure, and not for limiting the same; although the present disclosure has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present disclosure, and are intended to be included within the scope of the present disclosure.
Claims (13)
1. The durability test device of the vehicle transmission is characterized by comprising a test bench and an upper computer, wherein the test bench comprises a control cabinet, a bench body, a transmission gear-shifting controller system, a dual-mass flywheel, an input motor, an input rotating speed torque sensor, a transmission mounting bracket, an output motor and an output rotating speed torque sensor, the input motor is fixed on the bench body, the input rotating speed torque sensor is connected with the input rotating speed torque sensor, the input rotating speed torque sensor is connected with the transmission mounting bracket, the transmission is fixed on the transmission mounting bracket and is connected with the dual-mass flywheel, a vibration sensor is further arranged on the transmission, the output motor is connected with the output rotating speed torque sensor, and the output rotating speed torque sensor is connected with the transmission, the control cabinet is connected with the upper computer, the input motor, the output motor, the input rotating speed torque sensor, the output rotating speed torque sensor, the vibration sensor and the transmission gear-shifting control system;
the upper computer is used for acquiring distribution states of gears, torque, rotating speed and running time according to finished automobile test data, determining an endurance test mode of the transmission according to the distribution states of the gears, the torque, the rotating speed and the running time and feeding the endurance test mode back to the control cabinet, and the control cabinet is used for controlling the input motor, the output motor and the transmission gear-shifting control system to drive the transmission according to the endurance test mode so that the transmission works in the endurance test mode; input rotational speed torque sensor output rotational speed torque sensor is used for right the moment of torsion and the rotational speed of derailleur in endurance test process are monitored, and pass through the moment of torsion and the rotational speed of monitoring the switch board feeds back to the host computer, simultaneously vibration sensor is right the vibration state of derailleur in endurance test process is monitored, and feeds back the monitoring result through the switch board to the host computer, so that the host computer is through moment of torsion, rotational speed and the vibration value of monitoring to the durability of derailleur is judged, and the output judgement result.
2. The endurance testing apparatus according to claim 1, further comprising: the input transmission shaft, the output transmission shaft, and the input connecting piece and the output connecting piece which are fixed on the rack body;
the input motor, the input connection member, the input rotational speed torque sensor and the transmission mounting bracket are connected by the input transmission shaft, the output motor, the output connection member and the output rotational speed torque sensor are connected by the output transmission shaft, and the output connection member is connected with the transmission by the output transmission shaft.
3. The durability testing apparatus according to claim 2, wherein the output drive shaft includes a first output drive shaft and a second output drive shaft, the output motor includes a first output motor and a second output motor, the output rotational speed torque sensor includes a first output rotational speed torque sensor and a second output rotational speed torque sensor, and the output connection member includes a first output connection member and a second output connection member; the first output motor, the first output connecting piece and the first output rotating speed torque sensor are connected through the first output transmission shaft, the first output connecting piece is connected with the transmission through the first output transmission shaft, the second output motor, the second output connecting piece and the second output rotating speed torque sensor are connected through the second output transmission shaft, the second output connecting piece is connected with the transmission through the second output transmission shaft, and the first output motor, the second output motor, the first output rotating speed torque sensor and the second output rotating speed torque sensor are all connected with the control cabinet.
4. The durability test device of claim 2 or 3, wherein the input connection comprises an input coupling and an input bearing housing, the input coupling being connected between the input motor and the input rotational speed torque sensor through the input drive shaft, the input bearing housing being connected between the input rotational speed torque sensor and the transmission mounting bracket through the input drive shaft.
5. The durability testing apparatus according to claim 3, wherein the first output connection member includes a first output coupling and a first output bearing housing, the first output coupling being connected between the first output motor and the first output rotational speed and torque sensor through the first output transmission shaft, the first output bearing housing being connected between the first output rotational speed and torque sensor and the transmission through the first output transmission shaft.
6. The durability testing apparatus of claim 3, wherein the second output connection comprises a second output coupling and a second output bearing housing, the second output coupling is connected between the second output motor and the second output rotational speed and torque sensor through the second output transmission shaft, and the second output bearing housing is connected between the second output rotational speed and torque sensor and the transmission mounting bracket through the second output transmission shaft.
7. The durability testing device according to claim 1, further comprising a cooling system, wherein the cooling system is connected with the transmission and the control cabinet, and is used for acquiring the oil temperature of the transmission during the durability test, feeding the acquired oil temperature back to the control cabinet, and adjusting the oil temperature of the transmission during the durability test under the control of the control cabinet.
8. A durability test method based on the durability test apparatus of a vehicle transmission of claim 1, characterized by comprising:
acquiring distribution states of gears, torque, rotating speed and running time according to the whole vehicle test data, and determining an endurance test mode of the transmission according to the distribution states of the gears, the torque, the rotating speed and the running time;
controlling the input motor, the output motor and the transmission shift control system to drive the transmission according to the endurance test mode so that the transmission operates in the endurance test mode;
and monitoring the torque, the rotating speed and the vibration state of the transmission in the durability test process, judging the durability of the transmission according to the monitored torque, the monitored rotating speed and the monitored vibration value, and outputting a judgment result.
9. The endurance test method according to claim 8, wherein the determining the endurance test mode of the transmission according to the distribution states of the gear, the torque, the rotation speed, and the operation time includes:
acquiring the maximum rotating speed, the minimum rotating speed, the maximum torque and the minimum torque of the vehicle under each gear, the change time of the maximum rotating speed and the minimum rotating speed of the vehicle under each gear, the change time of the maximum torque and the minimum torque of the vehicle under each gear, the cycle times and the operating time of each gear in each cycle process according to the distribution state of the gears, the torque, the rotating speed and the operating time;
determining a change rule of the rotating speed of each gear according to the maximum rotating speed and the minimum rotating speed of the vehicle under each gear and the change time of the maximum rotating speed and the minimum rotating speed of the vehicle under each gear, and determining a change rule of the torque under each gear according to the maximum torque and the minimum torque of the vehicle under each gear and the change time of the maximum torque and the minimum torque of the vehicle under each gear;
determining a rotating speed running mode under each gear and a torque running mode under each gear according to the change rule of the rotating speed under each gear and the change rule of the torque under each gear respectively;
and determining the durability test mode of the transmission according to the rotating speed operation mode of each gear, the torque operation mode of each gear, the cycle number and the operation time of each gear in each cycle.
10. The durability test method according to claim 9, wherein the controlling the input motor, the output motor, and the transmission shift control system to drive the transmission according to the durability test mode to operate the transmission in the durability test mode includes:
controlling the transmission gear-shifting control system to work in a 1 gear according to the endurance test mode, so that the transmission gear-shifting control system controls the transmission to work in the 1 gear;
under the condition that the transmission works in a 1-gear position, controlling the input motor and the output motor to operate according to a 1-gear-position rotating speed operation mode, a 1-gear-position torque operation mode and the operation time of the 1-gear position in the first circulation process so as to carry out a first 1-gear-position endurance test on the transmission;
obtaining a first 1-gear durability test result of the transmission, if the first 1-gear durability test result of the transmission is qualified, controlling the transmission gear-shifting control system to work at a 2-gear position, and performing a first 2-gear durability test on the transmission according to a first 1-gear durability test mode until the transmission completes the first durability test of all the gears;
and when the first endurance test results of the transmission in all gears are qualified, controlling the input motor, the output motor and the transmission gear-shifting control system to drive the transmission to perform a second endurance test in all gears until the endurance test times of the transmission in all gears reach the cycle times.
11. The durability test method according to claim 10, further comprising:
after the current gear endurance test of the transmission is finished and before the next gear endurance test, controlling the input torque of the transmission to be reduced to zero, and controlling the input rotating speed of the transmission to be reduced to idle speed and then exiting the current gear.
12. The endurance testing method according to claim 10 or 11, further comprising:
before the transmission is subjected to the endurance test, the input motor and the output motor are controlled to drive the transmission to work in preset states with the rotating speed being a preset rotating speed and the torque being a preset torque, and the transmission is controlled to be in-run for a first preset time in all forward gears and to be in-run for a second preset time in all reverse gears in the preset states.
13. The durability test method according to claim 9, further comprising:
and setting alarm parameters of the transmission in the endurance test process according to the endurance test mode.
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