CN112161801A - Test method and test device for automatic transmission differential assembly - Google Patents
Test method and test device for automatic transmission differential assembly Download PDFInfo
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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
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
- G01M13/026—Test-benches of the mechanical closed-loop type, i.e. having a gear system constituting a closed-loop in combination with the object under test
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention relates to a test method and a test device for an automatic transmission differential assembly, which comprises the steps that on a loading test bench, an input motor is used for simulating a whole vehicle and providing power input for a transmission; respectively simulating two load wheels of an automobile through a left output motor and a right output motor; and carrying out loading brake control on the left output motor and the right output motor, so that the differential mechanism runs under a set differential working condition, and the running of the whole vehicle under a left turning working condition, a right turning working condition or a straight running working condition is simulated. The differential test can be carried out according to the actual operation condition of the whole vehicle, so that differential verification can be carried out without carrying the whole vehicle by a newly developed transmission; the limit working condition of the finished automobile differential can be realized, the finished automobile test is not carried, the safety of a driver is guaranteed, and the test operation is simplified.
Description
Technical Field
The invention relates to the technical field of automatic transmissions, in particular to a test method and a test device for an automatic transmission differential assembly.
Background
The differential assembly is an important part in the whole automatic transmission, and the performance and the durability of the differential are qualified as important standards for checking the transmission. After the transmission is carried on the whole vehicle, the differential is applied to mountainous regions, plateaus, high rings and snowfield road conditions. The differential is required to have no broken shaft, broken teeth and the like within 10 years.
In the process of implementing the invention, the inventor finds that the prior art has at least the following defects: at present, the differential verification of the whole machine can be carried out after the transmission needs to carry the whole vehicle, and the vehicle is operated by a driver in the test of carrying the whole vehicle, so that the safety risk exists; and the limit working condition of the differential is difficult to realize, for example, the rotating speed of one side is 0rpm, and the rotating speed of the other side is 2 times of the normal output rotating speed.
Therefore, a method for verifying various operating conditions of the differential is needed in the art.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a test method and a test device for an automatic transmission differential assembly, which do not need to be verified by a whole vehicle, avoid the safety risk during differential verification and make up the defect that the limit working condition in the prior art cannot be verified on the whole vehicle; the loading test bed is used for simulating the running of the whole vehicle and verifying the performance of the differential, the consistency of the test result and the vehicle carrying verification is high, and the test data is reliable.
In order to solve the technical problems, the technical scheme of the invention is as follows: a test method of a differential assembly of an automatic transmission comprises the steps of loading the differential assembly on a loading test bench,
simulating the whole vehicle through an input motor to provide power input for a transmission;
respectively simulating two load wheels of an automobile through a left output motor and a right output motor;
and carrying out loading brake control on the left output motor and the right output motor, so that the differential mechanism runs under a set differential working condition, and the running of the whole vehicle under a left turning working condition, a right turning working condition or a straight running working condition is simulated.
As an optimal technical scheme, in the test process, the left turning working condition, the right turning working condition and the straight running working condition are alternately carried out.
As a preferred technical scheme, the test comprises the following steps:
s1: loading the test bed to select a speed-torque mode;
s2: the transmission sets gears;
s3: the rotating speed of the input motor is increased from zero to a set input rotating speed within a set input time;
s4: switching the conversion mode of the loading test bed to a torque-speed mode;
s5: the rotating speed of the transmission is increased from zero to a set output rotating speed within a set output time;
s6: selecting a differential working condition, and accelerating a left output motor and a right output motor to set rotating speeds respectively;
s7: timing test time, and keeping differential operation for preset time;
s8: and completing the differential working condition simulation.
As an optimal technical scheme, under the working condition that the rotating speed difference of the left wheel and the right wheel is 1450rpm, the test time is 115-125 s.
According to the preferable technical scheme, the running time is 95-105 s under the working condition that the rotating speed difference between the left wheel and the right wheel is 550 rpm.
Preferably, in step S3, the input time is 5S and the input rotation speed is 750 rpm.
Preferably, in step S5, the output time is 15S and the output speed is 725 rpm.
Preferably, in step S2, the transmission is set to the D3 gear.
As a preferred technical scheme, in the test process, the differential mechanism sequentially completes the following differential working conditions:
the first differential operating condition is: the left wheel speed is 0rpm and the right wheel speed is 1450 rpm;
the second differential operating mode is as follows: the left wheel speed is 725rpm, the right wheel speed is 725 rpm;
the third differential operating mode is: the left wheel speed is 0rpm and the right wheel speed is 1450 rpm;
the fourth differential operating mode is: the left wheel speed is 1000rpm and the right wheel speed is 450 rpm;
the fifth differential operating mode is: the left wheel speed is 450rpm and the right wheel speed is 1000 rpm;
the sixth differential operating mode is: the left wheel speed is 725rpm, the right wheel speed is 725 rpm;
the seventh differential operating mode is: the left wheel speed is 0rpm and the right wheel speed is 1450 rpm;
the eighth differential operating mode is: the left wheel speed is 1000rpm and the right wheel speed is 450 rpm;
the ninth differential operating mode is: the left wheel speed is 450rpm and the right wheel speed is 1000 rpm;
the tenth differential condition is: the left wheel speed is 725rpm and the right wheel speed is 725 rpm.
The test device for implementing the test method of the automatic transmission differential assembly comprises an input motor, a transmission, a left output motor, a right output motor, the differential assembly, a first torque meter, a second torque meter and a third torque meter;
the input motor is in transmission connection with the transmission and is used for inputting power to the transmission;
the left output motor and the right output motor are respectively in transmission connection with the differential assembly;
the first torque meter is arranged between the left output motor and the differential assembly;
the second torque meter is arranged between the input motor and the transmission;
the third torque meter is arranged between the right output motor and the differential assembly.
By adopting the technical scheme, compared with the prior art, the invention has the following advantages:
(1) the differential test can be carried out according to the actual operation condition of the whole vehicle, so that differential verification can be carried out without carrying the whole vehicle by a newly developed transmission;
(2) only the transmission is required to be installed on the test bed, and the whole vehicle is not required to be carried for testing, so that the safety of a driver is guaranteed, and the test operation is simplified;
(3) the limit working condition of the finished automobile differential can be realized, namely the working condition that the rotating speed of one side is 0rpm and the rotating speed of the other side is 2 times of the normal output rotating speed;
(4) the speed and the torque of the left side and the right side can be tested, and the problem that the speed and the torque of the left wheel and the right wheel cannot be tested when the transmission is carried on the whole vehicle for testing is solved.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of the construction of an apparatus for carrying out the test method of the present invention.
In the figure: 1-a left output motor; 2-a first torque meter; 3-a transmission; 4-a second torque meter; 5-inputting a motor; 6-a third torque meter; 7-right output motor; 8-differential assembly.
Detailed Description
A test method for an automatic transmission differential assembly, the test device for implementing the test method comprises: the device comprises an input motor 5, a transmission 3, a left output motor 1, a right output motor 7, a differential assembly 8, a first torque meter 2, a second torque meter 4 and a third torque meter 6;
the input motor 5 is in transmission connection with the transmission 3 and is used for inputting power to the transmission 3;
the left output motor 1 and the right output motor 7 are respectively in transmission connection with a differential mechanism assembly 8 through transmission rods;
the first torque meter 2 is arranged between the left output motor 1 and the differential assembly 8;
the second torque meter 4 is disposed between the input motor 5 and the transmission 3;
the third torque meter 6 is disposed between the right output motor 7 and the differential assembly 8.
The input motor 5 inputs a rotation speed and a torque to the transmission 3. When the left wheel and the right wheel turn, the rotating speed and the torque of the wheels of the whole vehicle are output; the left output motor 1 and the right output motor 7 are subjected to loading brake control, and differential operation of a left wheel and a right wheel during turning of the whole vehicle is simulated; the left output motor 1 and the right output motor 7 respectively output the rotating speeds of a left wheel and a right wheel, and the first torque meter 2 and the third torque meter 6 respectively output the torques of the left wheel and the right wheel.
A test method of a differential assembly of an automatic transmission comprises the steps of loading the differential assembly on a loading test bench,
the whole vehicle is simulated through the input motor 5, and power input is provided for the transmission 3;
two load wheels of the automobile are simulated through the left output motor 1 and the right output motor 7 respectively;
and (3) carrying out loading brake control on the left output motor 1 and the right output motor 7, so that the differential mechanism runs under a set differential working condition, and the running of the whole vehicle under a left turning working condition, a right turning working condition or a straight running working condition is simulated.
In the test process, the rotating speed of the left wheel and the rotating speed of the right wheel are respectively realized by the left output motor 1 and the right output motor 7. For example, when the normal speed of the right-turning is 50Km/h, the rotating speed of the left wheel is 500rpm, and the rotating speed of the right wheel is 450 rpm; during the test, the rotating speed of the left output motor 1 can be set to be 500rpm, and the rotating speed of the right output motor 7 can be set to be 450 rpm; and the turning travel time can be set according to requirements.
Optimally, in the test process, the left-turning working condition, the right-turning working condition and the straight-going working condition are alternated to simulate the working condition of the whole vehicle in actual running, so that the test data is close to the practical application.
The test comprises the following steps:
s1: loading the test bed to select a speed-torque mode;
s2: the transmission sets gears;
s3: the rotating speed of the input motor is increased from zero to a set input rotating speed within a set input time;
s4: switching the conversion mode of the loading test bed to a torque-speed mode;
s5: the rotating speed of the transmission is increased from zero to a set output rotating speed within a set output time;
s6: selecting a differential working condition, and accelerating a left output motor and a right output motor to set rotating speeds respectively;
s7: timing test time, and keeping differential operation for preset time;
s8: and completing the differential working condition simulation.
In step S2, the transmission preferably sets the D3 gear.
In step S3, the input time is 5S and the input rotation speed is 750 rpm.
In step S5, the output time is 15S and the output rotation speed is 725 rpm.
Under the working condition that the rotating speed difference of the left wheel and the right wheel is 1450rpm, the test time is 115-125 s, the test condition is close to the actual running working condition of the differential on the whole vehicle, the actual use working condition of the differential can be optimally simulated, and the test data can intuitively and effectively reflect the actual use. Most preferably, the test time is set to 120 s.
Similarly, under the working condition that the rotating speed difference between the left wheel and the right wheel is 550rpm, the running time is 95-105 s; most preferably, the test time is set to 100 s.
When the differential operates on the whole vehicle, the differential needs to be switched and operated under different differential working conditions. Therefore, to verify the performance of the differential, it is necessary for the differential to operate under different differential conditions. In the test process, the differential mechanism sequentially completes the following differential working conditions:
the first differential operating condition is: the left wheel speed is 0rpm and the right wheel speed is 1450 rpm;
the second differential operating mode is as follows: the left wheel speed is 725rpm, the right wheel speed is 725 rpm;
the third differential operating mode is: the left wheel speed is 0rpm and the right wheel speed is 1450 rpm;
the fourth differential operating mode is: the left wheel speed is 1000rpm and the right wheel speed is 450 rpm;
the fifth differential operating mode is: the left wheel speed is 450rpm and the right wheel speed is 1000 rpm;
the sixth differential operating mode is: the left wheel speed is 725rpm, the right wheel speed is 725 rpm;
the seventh differential operating mode is: the left wheel speed is 0rpm and the right wheel speed is 1450 rpm;
the eighth differential operating mode is: the left wheel speed is 1000rpm and the right wheel speed is 450 rpm;
the ninth differential operating mode is: the left wheel speed is 450rpm and the right wheel speed is 1000 rpm;
the tenth differential condition is: the left wheel speed is 725rpm and the right wheel speed is 725 rpm.
For example, for validation of a differential mounted on an 8AT transmission, the following conditions may be accomplished in sequence:
the working condition I is as follows:
s11: loading the test bed to select a speed-torque mode;
s21: the transmission 3 is in D3 gear, specifically, the current of the TC torque converter is 900mA, so that the transmission 3 is in transmission connection with the input motor 5; the C1, C3 and C4 clutches supply current of 1000mA to realize gear setting;
s31: the rotating speed of the input motor 5 is increased from 0 to 750rpm for 5 s;
s41: switching the conversion mode of the loading test bed to a torque-speed mode;
s51: the output speed of the transmission 3 is increased from 0 to 725rpm for 15 s;
s61: selecting a differential working condition, wherein the rotating speed of a left wheel is 0rpm, and the rotating speed of a right wheel is 1450 rpm;
s71: after the rotation speed of the left wheel and the right wheel is adjusted, the test time is timed, and the differential operation is kept for 120 s;
s81: and finishing the differential working condition test and performing a working condition II.
Working conditions are as follows:
s12: loading the test bed to select a speed-torque mode;
s22: transmission 3 gives D3 gear; specifically, the current of the TC torque converter is 900mA, so that the transmission 3 is in transmission connection with the input motor 5; the C1, C3 and C4 clutches supply current of 1000mA to realize gear setting;
s32: the rotating speed of the input motor 5 is increased from 0 to 750rpm for 5 s;
s42: loading a test bed conversion mode torque-speed mode;
s52: the output speed of the transmission 3 is increased from 0 to 725rpm for 15 s;
s62: selecting a differential working condition, wherein the rotating speed of a left wheel is 725rpm, and the rotating speed of a right wheel is 725 rpm;
s72: after the rotation speed of the left wheel and the right wheel is adjusted, the test time starts to be timed, and the differential operation is kept for 100 s;
s82: the differential condition test is completed, and the third condition is carried out.
Working conditions are as follows:
s13: loading the test bed to select a speed-torque mode;
s23: transmission 3 gives D3 gear; specifically, the current of the TC torque converter is 900mA, so that the transmission 3 is in transmission connection with the input motor 5; the C1, C3 and C4 clutches supply current of 1000mA to realize gear setting;
s33: the rotating speed of the input motor 5 is increased from 0 to 750rpm for 5 s;
s43: loading a test bed conversion mode torque-speed mode;
s53: the output speed of the transmission 3 is increased from 0 to 725rpm for 15 s;
s63: selecting a differential working condition, wherein the rotating speed of a left wheel is 0rpm, and the rotating speed of a right wheel is 1450 rpm;
s73: after the rotation speed of the left wheel and the right wheel is adjusted, the test time is timed, and the differential operation is kept for 120 s;
s83: the differential condition test is completed, and the fourth condition is carried out.
Working conditions are as follows:
s14: loading the test bed to select a speed-torque mode;
s24: transmission 3 gives D3 gear; specifically, the current of the TC torque converter is 900mA, so that the transmission 3 is in transmission connection with the input motor 5; the C1, C3 and C4 clutches supply current of 1000mA to realize gear setting;
s34: the rotating speed of the input motor 5 is increased from 0 to 750rpm for 5 s;
s44: loading test bed conversion mode torque-speed mode
S54: the output speed of the transmission 3 is increased from 0 to 725rpm for 15 s;
s64: selecting a differential working condition, wherein the rotating speed of a left wheel is 1000rpm, and the rotating speed of a right wheel is 450 rpm;
s74: after the rotation speed of the left wheel and the right wheel is adjusted, the test time starts to be timed, and the differential operation is kept for 100 s;
s84: the differential condition test is completed, and the working condition five is carried out.
Working condition five:
s15: loading the test bed to select a speed-torque mode;
s25: the transmission gives D3 gear; specifically, the current of the TC torque converter is 900mA, so that the transmission 3 is in transmission connection with the input motor 5; the C1, C3 and C4 clutches supply current of 1000mA to realize gear setting;
s35: the rotating speed of the input motor is increased from 0 to 750rpm for 5 s;
s45: loading a test bed conversion mode torque-speed mode;
s55: the output speed of the transmission 3 is increased from 0 to 725rpm for 15 s;
s65: selecting a differential working condition, wherein the rotating speed of a left wheel is 450rpm, and the rotating speed of a right wheel is 1000 rpm;
s75: after the rotation speed of the left wheel and the right wheel is adjusted, the test time starts to be timed, and the differential operation is kept for 100 s;
s85: the differential condition test is completed, and the working condition six is carried out.
Working condition six:
s16: loading the test bed to select a speed-torque mode;
s26: transmission 3 gives D3 gear; specifically, the current of the TC torque converter is 900mA, so that the transmission 3 is in transmission connection with the input motor 5; the C1, C3 and C4 clutches supply current of 1000mA to realize gear setting;
s36: the rotating speed of the input motor 5 is increased from 0 to 750rpm for 5 s;
s46: loading a test bed conversion mode torque-speed mode;
s56: the output speed of the transmission 3 is increased from 0 to 725rpm for 15 s;
s66: selecting a differential working condition, wherein the rotating speed of a left wheel is 725rpm, and the rotating speed of a right wheel is 725 rpm;
s76: after the rotation speed of the left wheel and the right wheel is adjusted, the test time starts to be timed, and the differential operation is kept for 100 s;
s86: the differential condition test is completed, and a seventh condition is performed.
A seventh working condition:
s17: loading the test bed to select a speed-torque mode;
s27: the transmission gives D3 gear; specifically, the current of the TC torque converter is 900mA, so that the transmission 3 is in transmission connection with the input motor 5; the C1, C3 and C4 clutches supply current of 1000mA to realize gear setting;
s37: the rotating speed of the input motor 5 is increased from 0 to 750rpm for 5 s;
s47: loading a test bed conversion mode torque-speed mode;
s57: the output speed of the transmission 3 is increased from 0 to 725rpm for 15 s;
s67: selecting a differential working condition, wherein the rotating speed of a left wheel is 0rpm, and the rotating speed of a right wheel is 1450 rpm;
s77: after the rotation speed of the left wheel and the right wheel is adjusted, the test time is timed, and the differential operation is kept for 120 s;
s87: the differential condition test is completed, and the working condition eight is carried out.
Working conditions are eight:
s18: loading the test bed to select a speed-torque mode;
s28: the transmission gives D3 gear; specifically, the current of the TC torque converter is 900mA, so that the transmission 3 is in transmission connection with the input motor 5; the C1, C3 and C4 clutches supply current of 1000mA to realize gear setting;
s38: the speed of the input motor 5 is increased from 0 to 750rpm for 5s
S48: loading a test bed conversion mode torque-speed mode;
s58: the output speed of the transmission 3 is increased from 0 to 725rpm for 15 s;
s68: selecting a differential working condition, wherein the rotating speed of a left wheel is 1000rpm, and the rotating speed of a right wheel is 450 rpm;
s78: after the rotation speed of the left wheel and the right wheel is adjusted, the test time starts to be timed, and the differential operation is kept for 100 s;
s88: the differential condition test is completed, and the working condition nine is carried out.
Working condition nine:
s19: loading the test bed to select a speed-torque mode;
s29: the transmission gives D3 gear; specifically, the current of the TC torque converter is 900mA, so that the transmission 3 is in transmission connection with the input motor 5; the C1, C3 and C4 clutches supply current of 1000mA to realize gear setting;
s39: the rotating speed of the input motor 5 is increased from 0 to 750rpm for 5 s;
s49: loading a test bed conversion mode torque-speed mode;
s59: the output speed of the transmission 3 is increased from 0 to 725rpm for 15 s;
s69: selecting a differential working condition, wherein the rotating speed of a left wheel is 450rpm, and the rotating speed of a right wheel is 1000 rpm;
s79: after the rotation speed of the left wheel and the right wheel is adjusted, the test time starts to be timed, and the differential operation is kept for 100 s;
s89: the differential condition test is completed, and the working condition is ten.
Ten working conditions:
s110: loading test bench selects speed-torque mode
S210: the transmission gives D3 gear; specifically, the current of the TC torque converter is 900mA, so that the transmission 3 is in transmission connection with the input motor 5; the C1, C3 and C4 clutches supply current of 1000mA to realize gear setting;
s310: the rotating speed of the input motor 5 is increased from 0 to 750rpm for 5 s;
s410: loading a test bed conversion mode torque-speed mode;
s510: the output speed of the transmission 3 is increased to 725rpm for 15 s;
s610: selecting a differential working condition, wherein the rotating speed of a left wheel is 725rpm, and the rotating speed of a right wheel is 725 rpm;
s710: after the rotation speed of the left wheel and the right wheel is adjusted, the test time starts to be timed, and the differential operation is kept for 100 s;
s810: the differential condition test is completed and the test is finished.
In the above test, the differential is operated at a differential speed, and the input speed and the input torque are maintained stable, for example, the input speed is maintained at 4365rpm and the input torque is maintained at 8.5 Nm.
When the Torque-Speed mode is used, vehicle parameters such as vehicle idling Speed, tire radius and the like can be edited, so that the running condition of the whole vehicle can be calculated.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A test method of an automatic transmission differential assembly is characterized in that: including on a loading test bed, which is,
simulating the whole vehicle through an input motor to provide power input for a transmission;
respectively simulating two load wheels of an automobile through a left output motor and a right output motor;
and carrying out loading brake control on the left output motor and the right output motor, so that the differential mechanism runs under a set differential working condition, and the running of the whole vehicle under a left turning working condition, a right turning working condition or a straight running working condition is simulated.
2. A method of testing an automatic transmission differential assembly as claimed in claim 1, wherein: in the test process, the left turning working condition, the right turning working condition and the straight running working condition are alternately carried out.
3. A method of testing an automatic transmission differential assembly as claimed in claim 1 or 2, wherein: the test comprises the following steps:
s1: loading the test bed to select a speed-torque mode;
s2: the transmission sets gears;
s3: the rotating speed of the input motor is increased from zero to a set input rotating speed within a set input time;
s4: switching the conversion mode of the loading test bed to a torque-speed mode;
s5: the rotating speed of the transmission is increased from zero to a set output rotating speed within a set output time;
s6: selecting a differential working condition, and accelerating a left output motor and a right output motor to set rotating speeds respectively;
s7: timing test time, and keeping differential operation for preset time;
s8: and completing the differential working condition simulation.
4. A method of testing an automatic transmission differential assembly as claimed in claim 3, wherein: under the working condition that the rotating speed difference between the left wheel and the right wheel is 1450rpm, the test time is 115-125 s.
5. A method of testing an automatic transmission differential assembly as claimed in claim 3, wherein: under the working condition that the rotating speed difference between the left wheel and the right wheel is 550rpm, the running time is 95-105 s.
6. A method of testing an automatic transmission differential assembly as claimed in claim 3, wherein: in step S3, the input time is 5S and the input rotation speed is 750 rpm.
7. A method of testing an automatic transmission differential assembly as claimed in claim 3, wherein: in step S5, the output time is 15S and the output rotation speed is 725 rpm.
8. A method of testing an automatic transmission differential assembly as claimed in claim 3, wherein: in step S2, the transmission sets the D3 gear.
9. A method of testing an automatic transmission differential assembly as claimed in claim 3, wherein: in the test process, the differential mechanism sequentially completes the following differential working conditions:
the first differential operating condition is: the left wheel speed is 0rpm and the right wheel speed is 1450 rpm;
the second differential operating mode is as follows: the left wheel speed is 725rpm, the right wheel speed is 725 rpm;
the third differential operating mode is: the left wheel speed is 0rpm and the right wheel speed is 1450 rpm;
the fourth differential operating mode is: the left wheel speed is 1000rpm and the right wheel speed is 450 rpm;
the fifth differential operating mode is: the left wheel speed is 450rpm and the right wheel speed is 1000 rpm;
the sixth differential operating mode is: the left wheel speed is 725rpm, the right wheel speed is 725 rpm;
the seventh differential operating mode is: the left wheel speed is 0rpm and the right wheel speed is 1450 rpm;
the eighth differential operating mode is: the left wheel speed is 1000rpm and the right wheel speed is 450 rpm;
the ninth differential operating mode is: the left wheel speed is 450rpm and the right wheel speed is 1000 rpm;
the tenth differential condition is: the left wheel speed is 725rpm and the right wheel speed is 725 rpm.
10. A test apparatus for carrying out a test method for an automatic transmission differential assembly according to any one of claims 1 to 9, characterized in that: the device comprises an input motor (5), a transmission (3), a left output motor (1), a right output motor (7), a differential assembly (8), a first torque meter (2), a second torque meter (4) and a third torque meter (6);
the input motor (5) is in transmission connection with the speed changer (3) and is used for inputting power to the speed changer (3);
the left output motor (1) and the right output motor (7) are respectively in transmission connection with a differential assembly (8);
the first torque meter (2) is arranged between the left output motor (1) and the differential assembly (8);
the second torque meter (4) is arranged between the input motor (5) and the transmission (3);
the third torque meter (6) is arranged between the right output motor (7) and the differential assembly (8).
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN117969083A (en) * | 2024-03-29 | 2024-05-03 | 麦格纳动力总成(江西)有限公司 | Differential slip test method, differential slip test system, readable storage medium and readable storage device |
| CN117969083B (en) * | 2024-03-29 | 2024-07-02 | 麦格纳动力总成(江西)有限公司 | Differential slip test method, differential slip test system, readable storage medium and readable storage device |
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