CN112268697A - Method for testing double-clutch automatic gearbox in segmented mode - Google Patents
Method for testing double-clutch automatic gearbox in segmented mode Download PDFInfo
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- CN112268697A CN112268697A CN202011173067.7A CN202011173067A CN112268697A CN 112268697 A CN112268697 A CN 112268697A CN 202011173067 A CN202011173067 A CN 202011173067A CN 112268697 A CN112268697 A CN 112268697A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/022—Power-transmitting couplings or clutches
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/027—Test-benches with force-applying means, e.g. loading of drive shafts along several directions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/028—Acoustic or vibration analysis
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Abstract
The invention discloses a method for testing a double clutch automatic gearbox in a segmented manner, which comprises the following steps: s1, writing bottom layer data into a control module of the gearbox through a test board; s2, performing a function test on the electronic pump of the gearbox; s3, gear self-learning of the gearbox is carried out; s4, carrying out no-load test on the gearbox; s5, judging whether the oil temperature of the gearbox reaches a target value, if so, performing S6, otherwise, idling the gearbox for one minute, and re-performing oil temperature measurement; s6, carrying out drag torque test on the gearbox, measuring and recording output torque values of the gearbox under different gears; s7, testing the synchronous state; s8, self-learning testing is conducted on odd and even gear clutches of the gearbox; and S9, carrying out NVH test on the gearbox. The invention provides a method for testing a double-clutch automatic gearbox in a segmented mode, which improves the test beat and the test accuracy of the double-clutch automatic gearbox and improves the productivity of the gearbox.
Description
Technical Field
The invention relates to a method for testing a double clutch automatic gearbox in a segmented mode.
Background
At present, in the production process of the double-clutch automatic gearbox, the offline test of the gearbox is a key step for checking the quality of the gearbox. The traditional test scheme is that the gearbox assembly is placed in a test bench to carry out non-load tests such as brushing and self-learning of bottom layer data, and then the performance of the gearbox is tested.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and provides a method for testing the double-clutch automatic gearbox in a segmented mode, which improves the test beat and the test accuracy of the double-clutch automatic gearbox and improves the productivity of the gearbox.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a method for testing the double clutch automatic gearbox in a segmented mode comprises the following steps:
s1, writing bottom layer data into a control module of the gearbox through a test board;
s2, performing a function test on the electronic pump of the gearbox;
s3, gear self-learning of the gearbox is carried out;
s4, carrying out no-load test on the gearbox;
s5, judging whether the oil temperature of the gearbox reaches a target value, if so, performing S6, otherwise, idling the gearbox for one minute, and re-performing oil temperature measurement;
s6, carrying out drag torque test on the gearbox, measuring and recording output torque values of the gearbox under different gears;
s7, verifying the gear shifting performance of each gear of the gearbox, and testing the synchronization state;
s8, self-learning testing is conducted on odd and even gear clutches of the gearbox;
and S9, carrying out NVH test on the gearbox.
Further, the step S1 includes:
step S11, reading hydraulic control module data of a corresponding gearbox from a database of the manufacturing executable system;
and step S12, writing the bottom layer data into the control module of the gearbox through the communication between the test board and the gearbox control module.
Further, the step S2 includes:
s21, establishing a pressure target value of a main oil path of the gearbox, enabling the rotating speed of an electronic pump of the gearbox to reach a rated rotating speed, keeping the rotating speed of an input motor of the test board to be zero, and stopping after circulating for multiple times;
s22, setting an electronic pump of the gearbox to reach a rated rotating speed, setting pressure target values of odd-numbered and even-numbered gear clutches of the gearbox, and after waiting for several seconds, reading actual pressure values of the odd-numbered and even-numbered gear clutches of the gearbox and actual current and rotating speed values of the electronic pump;
and S23, finally setting the target rotating speed of the electronic pump of the gearbox to be zero, waiting for several seconds, reading the actual values of the current and the rotating speed of the electronic pump of the gearbox, completing the detection of the function of the electronic pump, resetting the set signal, and storing data.
Further, the step S3 includes:
s31, setting a rotating speed according to the oil temperature of the gearbox, and setting different target values for the rotating speed within a +/-4 ℃ interval by taking the target oil temperature as a judgment standard;
s32, starting self-learning, sequentially combining shifting forks of all gears of the gearbox, and recording the last gear shift displacement and the middle position of each gear;
and S33, evaluating the displacement of each gear, recalculating, standardizing and writing into a bottom-layer database.
Further, the step S4 includes:
s41, setting the rotating speed of an input motor of the test board as a rated rotating speed, and idling for 1 minute if the oil temperature of the gearbox is lower than a target value;
s42, activating the automatic control of a main oil path of the gearbox, and activating the pressure control of odd-numbered and even-numbered gears of the gearbox;
s43, respectively inputting a group of square wave pulse signals to odd-numbered and even-numbered clutches of the gearbox, recording the pressure mean value of the two clutches, and judging whether the monitored actual value is zero or not when the pressure drop target value of the two clutches is zero;
s44, performing a pressure step test on a main oil path of the gearbox, setting the pressure of odd-numbered and even-numbered gears of the gearbox as rated values, setting a pressure target value that the step rises first and then falls in the main oil path of the gearbox, and recording the actual pressure values of the odd-numbered and even-numbered gears of the gearbox;
and S45, calculating the pressure mean value of the odd-numbered gear clutch and the even-numbered gear clutch of the gearbox in the processes of ascending and descending first and then obtaining the difference value between the odd-numbered gear clutch and the even-numbered gear clutch of the gearbox, wherein the difference value is the difference between the pressure mean value and the pressure target value.
Further, the step S6 includes:
s61, setting the pressure of a main oil way of the gearbox to a rated value, and setting the lubricating flow of the gearbox to the rated value;
and S62, opening odd-numbered gear clutches and even-numbered gear clutches of the gearbox, setting the rotating speed of an input shaft of the gearbox to a rated value, enabling all gears of the gearbox to be vacant, and measuring and recording torque values under different gears by combining the odd-numbered gear clutches and the even-numbered gear clutches of the gearbox respectively.
Further, the step S7 includes:
s71, establishing the pressure of a main oil way of the gearbox as a rated value, setting the lubricating flow of the gearbox as the rated value, and setting the rotating speed of an input shaft of the gearbox as the rated value;
and S72, respectively testing the gear shifting time of odd and even gears of the gearbox, and recording and evaluating the gear shifting time.
Further, the step S8 includes:
s81, establishing main oil path pressure of the gearbox as a rated value, setting lubricating flow of the gearbox as the rated value, and setting the rotating speed of an input shaft of the gearbox as the rated value;
and S82, self-learning of the odd-numbered gear clutch and the even-numbered gear clutch of the gearbox is respectively carried out, the pressure target values of the odd-numbered gear clutch and the even-numbered gear clutch of the gearbox are respectively set in combination with the odd-numbered gear and the even-numbered gear of the gearbox, the actual pressure values are recorded, the control unit of the gearbox is electrified again after the test is finished, and the test data and the bottom layer data are compared and corrected.
Further, the step S9 includes:
s91, closing oil circulation of a gearbox of the test board, activating clutch control, activating main oil way control, setting main oil way pressure and setting the maximum value of a lubricating valve;
s92, sequentially shifting the gearbox, inputting the rotating speed to increase and decrease the speed, recording the noise vibration level and the torque of the gearbox under different gear working conditions, and evaluating;
and S93, simultaneously reading the values of the temperature sensors at different positions of the gearbox, and comparing the values.
By adopting the technical scheme, the testing process is divided into a pre-testing part and a load testing part, and the oil temperature of the gearbox is increased through the pre-testing, so that the influence of the excessively low oil temperature on the later NVH test is avoided. By means of the sectional processing of the gearbox testing process, the testing beat is reduced, and the productivity and the testing efficiency are improved.
Drawings
FIG. 1 is a schematic block diagram of a method for testing a double clutch automatic transmission in sections according to the invention.
Detailed Description
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
As shown in figure 1, during testing, the automatic gearbox with the double clutches is placed in a test bench, and the testing is divided into two stages. A first stage pretest section comprising: flashing bottom layer data, testing the function of an electronic pump, self-learning a gear and testing no load; a second stage load testing section comprising: the method comprises the following steps of dragging torque testing, synchronous testing, clutch self-learning and NVH testing. The pre-test section is used for bedding the load test section and providing required basic conditions for the load test section.
As shown in fig. 1, a method for testing the double clutch automatic transmission in sections comprises the following steps:
s1, writing bottom layer data into a control module of the gearbox through a test board;
s2, performing a function test on the electronic pump of the gearbox;
s3, gear self-learning of the gearbox is carried out;
s4, carrying out no-load test on the gearbox;
s5, judging whether the oil temperature of the gearbox reaches a target value, if so, performing S6, otherwise, idling the gearbox for one minute, and re-performing oil temperature measurement;
s6, carrying out drag torque test on the gearbox, measuring and recording output torque values of the gearbox under different gears;
s7, verifying the gear shifting performance of each gear of the gearbox, and testing the synchronization state;
s8, self-learning testing is conducted on odd and even gear clutches of the gearbox;
and S9, carrying out NVH test on the gearbox.
As shown in fig. 1, step S1 includes:
step S11, reading hydraulic control module data of a corresponding gearbox from a database of the manufacturing executable system;
and step S12, writing the bottom layer data into the control module of the gearbox through the communication between the test board and the gearbox control module.
After the gearbox is assembled and oil is injected, the gearbox is in butt joint with a pre-testing station of a testing table, the testing table is used for electrifying a control module of the gearbox, and bottom software and hydraulic control module data corresponding to the model and serial number of the gearbox are obtained. The wet-type double-clutch automatic gearbox is in an electro-hydraulic control mode, an electromagnetic valve in an oil path is a main control component of a clutch pressure actuating mechanism, and the oil pressure is controlled and executed by controlling the opening and closing of the electromagnetic valve and the opening degree.
In this embodiment, the control module of the transmission further controls the oil pressure by controlling the opening and the degree of opening of the solenoid valve by controlling the magnitude of the current, so that basic data corresponding to the oil pressure needs to be written into the control module of the transmission.
As shown in fig. 1, step S2 includes:
s21, the electronic pump is used as a part for supplementing oil pressure of the mechanical pump, the performance stability is important, a pressure target value of a main oil way of the gearbox is established, the rotating speed of the electronic pump of the gearbox reaches a rated rotating speed, the rotating speed of an input motor of the test board is kept to be zero, and the electronic pump stops after being circulated for multiple times;
s22, setting an electronic pump of the gearbox to reach a rated rotating speed, setting pressure target values of odd-numbered and even-numbered gears of the gearbox, and after waiting for several seconds, reading actual pressure values of the odd-numbered and even-numbered gears of the gearbox and actual current and rotating speed values of the electronic pump;
and S23, finally setting the target rotating speed of the electronic pump of the gearbox to be zero, waiting for several seconds, reading the actual values of the current and the rotating speed of the electronic pump of the gearbox, completing the detection of the function of the electronic pump, resetting the set signal, and storing data.
As shown in fig. 1, step S3 includes:
s31, setting a rotating speed according to the oil temperature of the gearbox, and setting different target values for the rotating speed within a +/-4 ℃ interval by taking the target oil temperature as a judgment standard;
s32, starting self-learning, sequentially combining shifting forks of all gears of the gearbox, and recording the last gear shift displacement and the middle position of each gear;
and S33, evaluating the displacement of each gear, recalculating, standardizing and writing into a bottom-layer database.
After the electronic pump test, the oil temperature of the gearbox begins to rise, different input rotating speeds are set according to different oil temperatures, different target values are set for the input rotating speeds within a specified tolerance interval by taking the target oil temperature as a judgment standard, then self-learning is started, each gear is repeatedly combined and separated, in the process, the movement of each gear shifting fork is controlled by an electromagnetic valve inside a hydraulic control module through oil pressure, a sensor inside the hydraulic control module records a corresponding current value, the corresponding current value is fed back to the inside of a transmission control module, and original data are corrected; finally, confirming the data state, evaluating the displacement of each gear, recalculating, and writing the standardized displacement into a bottom database; to ensure that the different transmissions are well integrated with the hydraulic module.
As shown in fig. 1, step S4 includes:
s41, supplementing the function of the electronic pump when the oil pressure of the mechanical pump is insufficient, setting the rotating speed of an input motor of the test board as a rated rotating speed after the function of the electronic pump is ensured to be normal, and idling for 1 minute if the oil temperature of the gearbox is lower than a target value;
s42, activating the automatic control of a main oil path of the gearbox, and activating the pressure control of a clutch of the gearbox;
s43, respectively inputting a group of square wave pulse signals to odd-numbered and even-numbered clutches of the gearbox, recording the pressure mean value of the two clutches, and judging whether the monitored actual value is zero or not when the pressure drop target value of the two clutches is zero;
s44, performing a pressure step test on a main oil path of the gearbox, setting the pressures of odd-numbered and even-numbered gears of the gearbox as rated values, setting a pressure target value of which the step is increased firstly and then decreased secondly on the main oil path of the gearbox, and recording actual pressure values of the odd-numbered and even-numbered gears;
and S45, calculating the pressure mean value of the odd-numbered and even-numbered gears in the process of ascending first and then descending to obtain the difference value between the odd-numbered and even-numbered gears, wherein the difference value is the difference between the pressure mean value and the pressure target value.
As shown in fig. 1, step S6 includes:
s61, after the no-load test is finished, the states of odd-numbered and even-numbered gears of the clutch are guaranteed, the pressure of a main oil way of the gearbox is set to a rated value, and the lubricating flow of the gearbox is set to the rated value;
and S62, opening the odd-numbered gear clutch and the even-numbered gear clutch, setting the rotating speed of the input shaft of the gearbox to a rated value, enabling all gears of the gearbox to be vacant, combining the odd-numbered gear clutch and the even-numbered gear clutch respectively, measuring the torque values under different gears and recording the torque values.
As shown in fig. 1, through a drag torque test, the torque of each system of the transmission against the friction force can be obtained, and in order to verify the performance of each gear shifting, the synchronization state needs to be tested, and step S7 includes:
s71, establishing main oil path pressure of the gearbox as a rated value, setting lubricating flow of the gearbox as the rated value, and setting input shaft rotation speed of the gearbox as the rated value;
and S72, respectively testing the gear shifting time of odd gears and even gears of the gearbox, recording and evaluating.
As shown in fig. 1, step S8 includes:
s81, establishing main oil path pressure of the gearbox as a rated value, setting lubricating flow of the gearbox as the rated value, and setting the rotating speed of an input shaft of the gearbox as the rated value;
and S82, self-learning of odd-numbered and even-numbered gears of the gearbox is respectively carried out, pressure target values of the odd-numbered and even-numbered gears of the gearbox are set respectively by combining the odd-numbered and even-numbered gears of the gearbox, actual pressure values are recorded, the control unit of the gearbox is electrified again after the test is finished, and the test data and the bottom layer data are compared and corrected.
As shown in fig. 1, step S9 includes:
s91, after each functional test of the gearbox is completed, closing gearbox oil circulation of the test board, activating clutch control, activating main oil way control, setting main oil way pressure and setting the maximum value of a lubrication valve;
s92, sequentially shifting gears of the gearbox, inputting the rotating speed, increasing the speed and then decreasing the speed, recording the noise vibration level and the torque of the gearbox under different gear working conditions, and evaluating;
and S93, simultaneously reading the values of the temperature sensors at different positions of the gearbox, and comparing the values.
The technical problems, technical solutions and advantages of the present invention have been described in detail with reference to the above embodiments, and it should be understood that the above embodiments are merely exemplary and not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A method for testing the double clutch automatic gearbox in sections is characterized by comprising the following steps:
s1, writing bottom layer data into a control module of the gearbox through a test board;
s2, performing a function test on the electronic pump of the gearbox;
s3, gear self-learning of the gearbox is carried out;
s4, carrying out no-load test on the gearbox;
s5, judging whether the oil temperature of the gearbox reaches a target value, if so, performing S6, otherwise, idling the gearbox for one minute, and re-performing oil temperature measurement;
s6, carrying out drag torque test on the gearbox, measuring and recording output torque values of the gearbox under different gears;
s7, verifying the gear shifting performance of each gear of the gearbox, and testing the synchronization state;
s8, self-learning testing is conducted on odd and even gear clutches of the gearbox;
and S9, carrying out NVH test on the gearbox.
2. The twin-clutch automatic transmission sectional testing method according to claim 1, wherein the step S1 includes:
step S11, reading hydraulic control module data of a corresponding gearbox from a database of the manufacturing executable system;
and step S12, writing the bottom layer data into the control module of the gearbox through the communication between the test board and the gearbox control module.
3. The twin-clutch automatic transmission segment testing method according to claim 2, wherein the step S2 includes:
s21, establishing a pressure target value of a main oil path of the gearbox, enabling the rotating speed of an electronic pump of the gearbox to reach a rated rotating speed, keeping the rotating speed of an input motor of the test board to be zero, and stopping after circulating for multiple times;
s22, setting an electronic pump of the gearbox to reach a rated rotating speed, setting pressure target values of odd-numbered and even-numbered gear clutches of the gearbox, and reading actual pressure values of the odd-numbered and even-numbered gear clutches of the gearbox and actual current and rotating speed values of the electronic pump;
s23, setting the target rotating speed of the electronic pump of the gearbox to be zero, reading the actual values of the current and the rotating speed of the electronic pump of the gearbox, completing the detection of the function of the electronic pump, setting the signal to be reset, and storing data.
4. The twin-clutch automatic transmission segment testing method according to claim 3, wherein the step S3 includes:
s31, setting a rotating speed according to the oil temperature of the gearbox, and setting different target values for the rotating speed within a +/-4 ℃ interval by taking the target oil temperature as a judgment standard;
s32, starting self-learning, sequentially combining shifting forks of all gears of the gearbox, and recording the last gear shift displacement and the middle position of each gear;
and S33, evaluating the displacement of each gear, recalculating, standardizing and writing into a bottom-layer database.
5. The twin-clutch automatic transmission segment testing method according to claim 4, wherein the step S4 includes:
s41, setting the rotating speed of an input motor of the test board as a rated rotating speed, and idling for 1 minute if the oil temperature of the gearbox is lower than a target value;
s42, activating the automatic control of a main oil path of the gearbox, and activating the pressure control of odd-numbered and even-numbered gears of the gearbox;
s43, respectively inputting a group of square wave pulse signals to the odd-numbered gear clutch and the even-numbered gear clutch of the gearbox, recording the pressure mean value of the odd-numbered gear clutch and the even-numbered gear clutch of the gearbox, and judging whether the monitored actual value is zero or not when the pressure drop target value of the odd-numbered gear clutch and the even-numbered gear clutch of the gearbox is zero;
s44, performing a pressure step test on a main oil path of the gearbox, setting the pressure of odd-numbered and even-numbered gears of the gearbox as rated values, setting a pressure target value that the step rises first and then falls in the main oil path of the gearbox, and recording the actual pressure values of the odd-numbered and even-numbered gears of the gearbox;
and S45, calculating the pressure mean value of the odd-numbered gear clutch and the even-numbered gear clutch of the gearbox in the processes of ascending and descending first and then obtaining the difference value between the odd-numbered gear clutch and the even-numbered gear clutch of the gearbox, wherein the difference value is the difference between the pressure mean value and the pressure target value.
6. The twin-clutch automatic transmission segment testing method according to claim 5, wherein the step S6 includes:
s61, setting the pressure of a main oil way of the gearbox to a rated value, and setting the lubricating flow of the gearbox to the rated value;
and S62, opening odd-numbered gear clutches and even-numbered gear clutches of the gearbox, setting the rotating speed of an input shaft of the gearbox to a rated value, enabling all gears of the gearbox to be vacant, and measuring and recording torque values under different gears by combining the odd-numbered gear clutches and the even-numbered gear clutches of the gearbox respectively.
7. The twin-clutch automatic transmission segment testing method according to claim 6, wherein the step S7 includes:
s71, establishing the pressure of a main oil way of the gearbox as a rated value, setting the lubricating flow of the gearbox as the rated value, and setting the rotating speed of an input shaft of the gearbox as the rated value;
and S72, respectively testing the gear shifting time of odd and even gears of the gearbox, and recording and evaluating the gear shifting time.
8. The twin-clutch automatic transmission segment testing method according to claim 7, wherein the step S8 includes:
s81, establishing main oil path pressure of the gearbox as a rated value, setting lubricating flow of the gearbox as the rated value, and setting the rotating speed of an input shaft of the gearbox as the rated value;
and S82, self-learning of odd-numbered and even-numbered gears of the gearbox is respectively carried out, pressure target values of the odd-numbered and even-numbered gears of the gearbox are set respectively by combining the odd-numbered and even-numbered gears of the gearbox, actual pressure values are recorded, a control unit of the gearbox is electrified again after the test is finished, and test data and bottom layer data are compared and corrected.
9. The twin-clutch automatic transmission segment testing method according to claim 8, wherein the step S9 includes:
s91, closing oil circulation of a gearbox of the test board, activating clutch control, activating main oil way control, setting main oil way pressure and setting the maximum value of a lubricating valve;
s92, sequentially shifting the gearbox, inputting the rotating speed to increase and decrease the speed, recording the noise vibration level and the torque of the gearbox under different gear working conditions, and evaluating;
and S93, simultaneously reading the values of the temperature sensors at different positions of the gearbox, and comparing the values.
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| CN113008551B (en) * | 2021-03-31 | 2022-04-22 | 安徽江淮汽车集团股份有限公司 | Clutch performance evaluation method and device |
| CN115217967A (en) * | 2021-04-26 | 2022-10-21 | 广州汽车集团股份有限公司 | Automatic transmission synchronizer characteristic point self-learning method and system |
| CN115217967B (en) * | 2021-04-26 | 2023-08-04 | 广州汽车集团股份有限公司 | Automatic transmission synchronizer characteristic point self-learning method and system |
| CN113834650A (en) * | 2021-09-22 | 2021-12-24 | 哈尔滨东安汽车发动机制造有限公司 | Speed changer valve body testing device special for hybrid motion and testing method |
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