CN112461530A - High-low temperature comprehensive test bed for automobile automatic transmission valve body - Google Patents
High-low temperature comprehensive test bed for automobile automatic transmission valve body Download PDFInfo
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- CN112461530A CN112461530A CN202011420137.4A CN202011420137A CN112461530A CN 112461530 A CN112461530 A CN 112461530A CN 202011420137 A CN202011420137 A CN 202011420137A CN 112461530 A CN112461530 A CN 112461530A
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- 238000012360 testing method Methods 0.000 title claims abstract description 36
- 230000005540 biological transmission Effects 0.000 title claims abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 43
- 239000007788 liquid Substances 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 15
- 238000009413 insulation Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000003595 mist Substances 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 127
- 239000010720 hydraulic oil Substances 0.000 description 8
- 238000009530 blood pressure measurement Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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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
Abstract
The invention relates to the field of automobile electromagnetic valve detection, in particular to a high-low temperature comprehensive test bed for an automobile automatic transmission valve body, which is characterized by comprising a test cabin assembly and a detection device arranged in the test cabin assembly, wherein the test cabin assembly comprises a high-temperature pressure supply cabin, a low-temperature pressure supply cabin and a detection cabin; the high-temperature pressure measuring unit is arranged in the high-temperature pressure supply cabin, the low-pressure measuring unit is arranged in the low-temperature pressure supply cabin, and the detection cabin is arranged between the high-temperature and first pressure supply cabins and is communicated with the high-temperature and low-temperature pressure measuring units. The high-temperature branch circuit and the low-temperature branch circuit are separated, and the tolerance degree of the automobile electromagnetic valve to pressure under the high-temperature or low-temperature condition can be detected.
Description
Technical Field
The invention belongs to the field of detection of automobile electromagnetic valves, and particularly relates to a high-low temperature comprehensive test bed for an automobile automatic transmission valve body.
Background
The automobile electromagnetic valve is an actuating element of an electronic control system, whether the automobile runs safely is determined by the quality of the electromagnetic valve, detailed detection needs to be carried out on the electromagnetic valve before leaving a factory, and hydraulic pressure testing is particularly important because the electromagnetic valve is in a pressure environment for a long time. The traditional automobile electromagnetic valve detection system is low in integration degree and large in size; meanwhile, the traditional automobile electromagnetic valve detection part is single, only the mode that one end is used for transmitting pressure and the other end is used for detecting the electromagnetic valve is adopted, and the test mode cannot detect the running state of the electromagnetic valve at high temperature or low temperature.
Disclosure of Invention
The invention aims to provide a system capable of carrying out hydraulic test on an automobile electromagnetic valve under high-temperature and low-temperature pressures.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the high-low temperature comprehensive test bed for the valve body of the automatic transmission of the automobile comprises a test cabin assembly and a detection device arranged in the test cabin assembly, wherein the test cabin assembly comprises a high-temperature pressure supply cabin, a low-temperature pressure supply cabin and a detection cabin, and the detection device comprises a high-temperature pressure measuring unit, a low-temperature pressure measuring unit, an oil inlet main path and an oil outlet main path;
the high-temperature pressure measuring unit is arranged in the high-temperature pressure supply cabin, the low-pressure measuring unit is arranged in the low-temperature pressure supply cabin, and the detection cabin is arranged between the high-temperature and first pressure supply cabins and is communicated with the high-temperature and low-temperature pressure measuring units;
one end of the oil inlet main path is communicated with the detection cabin, and the other end of the oil inlet main path is branched into a first high-temperature branch and a first low-temperature branch which are respectively communicated with the high-temperature pressure measuring unit and the low-temperature pressure measuring unit;
one end of the oil outlet main line is communicated with the detection cabin, a second high-temperature branch and a second low-temperature branch are branched from the other end of the oil outlet main line and are respectively communicated with the high-temperature pressure measuring unit and the low-temperature pressure measuring unit, and a first three-way valve is arranged at the junction of the second high-temperature branch and the second low-temperature branch.
Further, a valve body tool used for clamping the valve body to be tested is arranged in the detection cabin, and two ends of the valve body tool are respectively connected and communicated with the oil inlet main path and the oil outlet main path in a sealing mode.
Furthermore, an opening is formed in the bottom of the detection cabin, an oil receiving disc is connected to the outside of the opening, an oil leakage main line is connected to the bottom of the oil receiving disc, a third high-temperature branch and a third low-temperature branch are branched from the other end of the oil leakage main line and are respectively communicated with the high-temperature pressure measuring unit and the low-temperature pressure measuring unit, and a second three-way valve is arranged at the intersection of the third high-temperature branch and the third low-temperature branch.
Further, the high temperature load cell includes:
the heat-insulating oil tank is internally provided with a cavity, the top of the heat-insulating oil tank is provided with an oil filling port, the bottom of the heat-insulating oil tank is provided with a pump oil outlet, the pump oil outlet is communicated with the first high-temperature branch through an oil pipe, and the oil filling port is externally provided with an air filter capable of covering the oil filling port;
the liquid level meter penetrates through the upper surface of the heat-preservation oil tank and extends into the cavity;
the stirrer comprises a stirring motor arranged on the upper surface of the heat-insulating oil tank and a stirring head which is arranged in the cavity and driven by the stirring motor;
the heater comprises 3 to 5 heating rods arranged in parallel, and the heating rods extend from the bottom of the heat-insulating oil tank to the inside of the cavity.
Further, the low temperature pressure measuring unit includes:
the evaporator is coiled on the periphery of the oil storage chamber, an oil inlet and an oil outlet which are communicated with the oil storage chamber are formed in the side surface of the heat insulation shell, and a liquid inlet and a liquid outlet which are communicated with the evaporator and are used for conducting condensate are also formed in the side surface of the heat insulation shell;
the oil storage chamber is characterized by further comprising two stirrers, the stirrers penetrate through the top cover plate and are inserted into the oil storage chamber, and the stirrers are arranged along the long edge direction of the top cover plate.
Further, an oil inlet detector is arranged between the oil inlet main path and the valve body tool, and the oil inlet detector comprises a pressure gauge, a pressure sensor and a temperature sensor which are mutually communicated.
Furthermore, the first high-temperature branch and the first low-temperature branch are provided with check valves.
Furthermore, an oil collecting hole is formed in the top of the detection cabin, and the oil collecting hole is communicated with an oil mist collector.
In summary, compared with the conventional technical scheme, the technical scheme adopted by the invention has the following beneficial effects:
the high-temperature branch circuit and the low-temperature branch circuit are separated, and the tolerance degree of the automobile electromagnetic valve to pressure under the high-temperature or low-temperature condition can be detected.
Drawings
The foregoing and other objects, features, and advantages of the invention will be apparent from the following detailed description taken in conjunction with the accompanying drawings.
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic top cross-sectional view of the present invention;
FIG. 3 is a schematic view of the detection apparatus of the present invention;
FIG. 4 is a schematic perspective view of a high temperature pressure cell according to the present invention;
FIG. 5 is a schematic cross-sectional view of a high temperature pressure cell according to the present invention;
FIG. 6 is a schematic perspective view of a low temperature pressure cell according to the present invention;
FIG. 7 is a schematic cross-sectional view of the low temperature pressure measuring unit of the present invention;
fig. 8 is a front view of the low temperature pressure measuring unit according to the present invention.
Wherein:
100. a detection device;
10. the device comprises a high-temperature pressure measuring unit, 11 parts of a heat preservation oil tank, 12 parts of an oil filling port, 13 parts of a pump oil outlet, 14 parts of an air filter, 15 parts of a liquid level meter, 16 parts of a stirrer, 161 parts of a stirring motor, 162 parts of a stirring head, 17 parts of a heater and 171 parts of a heating rod;
20. the low-temperature pressure measuring device comprises a low-temperature pressure measuring unit, 21, a heat insulation shell, 22, a top cover plate, 23, an evaporator, 24, an oil storage chamber, 25, an oil inlet, 26, an oil outlet, 27, a liquid inlet, 28, a liquid outlet and 29, a stirrer;
30. detecting a cabin;
40. an oil inlet main path, 41, a first high-temperature branch, 42, a first low-temperature branch, 43, a one-way valve;
50. the oil outlet main path 51, the second high-temperature branch path 52, the second low-temperature branch path 53 and the first three-way valve;
60. valve body tooling;
70. an oil receiving pan;
80. a main oil leakage path 81, a third high-temperature branch 82, a third low-temperature branch 83 and a second three-way valve;
90. the oil inlet detector, 91, the pressure gauge, 92, the pressure sensor and 93, the temperature sensor.
200. The test chamber assembly comprises a test chamber assembly, 210, a high-temperature pressure supply chamber, 220, a low-temperature pressure supply chamber, 230, an oil collecting hole and 240, and an oil mist collector.
Detailed Description
In light of the foregoing, it is intended that the following description be read in connection with the accompanying drawings and that the appended claims be construed as broadly as possible and that various changes and modifications may be made therein without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
The invention is further illustrated with reference to the following description of the drawings:
the high-low temperature comprehensive test bed for the valve body of the automatic transmission of the automobile comprises a test cabin assembly 200 and a detection device 100 arranged in the test cabin assembly 200, wherein the test cabin assembly 200 comprises a high-temperature pressure supply cabin 210, a low-temperature pressure supply cabin 220 and a detection cabin 30, and the detection device 100 comprises a high-temperature pressure measuring unit 10, a low-temperature pressure measuring unit 20, an oil inlet main path 40 and an oil outlet main path 50;
the high-temperature pressure measuring unit 10 is arranged in the high-temperature pressure supply cabin 210, the low-pressure measuring unit 20 is arranged in the low-temperature pressure supply cabin 220, and the detection cabin 30 is arranged between the high-temperature and first pressure supply cabins and is communicated with the high-temperature and low-temperature pressure measuring units;
the detection device 100 comprises a high-temperature pressure measuring unit 10, a low-temperature pressure measuring unit 20, a detection cabin 30, an oil inlet main path 40 and an oil outlet main path 50. An oil inlet 25 and an oil outlet 26 are respectively arranged on two sides of the detection chamber 30 so as to be communicated with the oil inlet main path 40 and the oil outlet main path 50. In a specific connection process, various fixed connection modes such as threaded connection, welding or sleeve connection and the like can be adopted to ensure that the joints of the oil inlet main passage 40 and the oil outlet main passage 50 and the detection chamber 30 are kept sealed.
One end of the oil inlet main path 40 is communicated with the detection cabin 30, and the other end is branched into a first high-temperature branch 41 and a first low-temperature branch 42 which are respectively communicated with the high-temperature pressure measuring unit 10 and the low-temperature pressure measuring unit 20; one end of the oil outlet main 50 is communicated with the detection chamber 30, and the other end is branched into a second high-temperature branch 51 and a second low-temperature branch 52 which are respectively communicated with the high-temperature pressure measuring unit 10 and the low-temperature pressure measuring unit 20. A first three-way valve 53 is arranged at the junction of the second high-temperature branch 51 and the second low-temperature branch 52. The second high temperature branch 51 and the second low temperature branch 52 are respectively communicated with two ends of the first three-way valve 53, and can adopt various fixed connection modes such as threaded connection, welding or sleeve connection. When the connection mode is adopted, high-temperature oil and low-temperature oil can be distinguished, and the high-temperature oil is prevented from flowing into the low-temperature pressure measuring unit 20 and the low-temperature oil is prevented from flowing into the high-temperature pressure measuring unit 10, so that the normal operation of the system is ensured. Preferably, in practical application, if the electronic three-way valve is adopted, the automatic high-temperature and low-temperature oil distinguishing can be realized according to the judgment of an upper computer program.
With regard to the above-mentioned high-low temperature comprehensive test bed for the automatic transmission valve body of the automobile, when oil inlet pressure measurement is required, only one of the high-temperature or low-temperature pressure measurement units 20 needs to be selected for oil supply and pressurization, and after the test is completed in the detection chamber 30, the first three-way valve 53 selects oil liquid at a corresponding temperature to be discharged into the corresponding high-temperature or low-temperature pressure measurement unit 20, so as to prepare for the next test.
The detection cabin 30 is internally provided with a valve body tool 60 for clamping a valve body to be detected, and two ends of the valve body tool 60 are respectively connected and communicated with the oil inlet main path 40 and the oil outlet main path 50 in a sealing manner. In a specific connection process, various fixed connection modes such as threaded connection, welding or sleeve connection and the like can be adopted to ensure that the joints of the oil inlet main passage 40 and the oil outlet main passage 50 and the valve body tool 60 are kept sealed. Preferably, in order to enable the vehicle solenoid valve to be tested to be loaded more at a time, the four-way valve body tool 60 is selected for use in the embodiment to simultaneously detect and reserve four ways of pipelines to be used as interfaces for subsequent connection with other test pipelines or as a standby interface after the current interface is damaged.
The bottom of the detection cabin 30 is provided with an opening and is externally connected with an oil receiving disc 70, the bottom of the oil receiving disc 70 is connected with an oil leakage main path, the other end of the oil leakage main path is branched into a third high-temperature branch 81 and a third low-temperature branch 82 which are respectively communicated with the high-temperature pressure measuring unit 10 and the low-temperature pressure measuring unit 20, and a second three-way valve 83 is arranged at the intersection of the third high-temperature branch 81 and the third low-temperature branch 82.
In a specific implementation, the oil leakage inevitably occurs along with the increase of the pressure. The oil receiving disc 70 in this embodiment is of a conical bottom shape, so that leaked oil can be conveniently collected along the oil receiving disc 70 in a sliding manner. In order to achieve a better using effect, the oil receiving disc 70 can be designed to be detachable in specific implementation, and is not integrally formed, so that the oil receiving disc 70 can be conveniently cleaned, for example, after the high-temperature oil pressure unit is detected, the oil receiving disc 70 can be detached to be cleaned, and the low-temperature pressure measuring unit 20 is prevented from being polluted.
The working principles of the third high temperature branch 81, the third low temperature branch 82 and the second three-way valve 83 are substantially the same as those of the first high temperature branch 41, the second high temperature branch 51 and the first three-way valve 53, and the achieved effects are also substantially the same, which is not described again.
The high-temperature pressure measuring unit 10 includes:
the oil pump is characterized by comprising a heat-insulating oil tank 11 with a cavity formed inside, wherein the top of the heat-insulating oil tank 11 is provided with an oil filling port 12, the bottom end of the heat-insulating oil tank is provided with a pump oil outlet 13, the pump oil outlet 13 is communicated with a first high-temperature branch 41 through an oil pipe, and an air filter 14 capable of covering the oil filling port 12 is arranged outside the oil filling port 12;
the upper surface of the self-heat-insulation oil tank 11 of the liquid level meter 15 penetrates through and extends into the cavity;
a stirring machine 16, wherein the stirring machine 16 comprises a stirring motor 161 arranged on the upper surface of the heat-preservation oil tank 11 and a stirring head 162 which is arranged in the cavity and driven by the stirring motor 161;
and the heater 17 comprises 3 to 5 heating rods 171 which are arranged in parallel, and the bottom of the self-heat-insulation oil tank 11 of the heating rods 171 extends into the cavity.
In the tank unit described above, the hydraulic oil consumed in the test was added through the oil filler port 12. The liquid level meter 15 can monitor the level of the hydraulic oil in the cavity of the oil tank unit in real time and feed back the hydraulic oil to the upper computer. The stirring machine 16 plays a role in stirring, so that the subsequent heater 17 can be conveniently heated to enable the subsequent heater to be heated more uniformly, and the blockage of each through opening of the thermal insulation oil tank 11 caused by the settlement of impurities in the hydraulic oil after the hydraulic oil is not used for a long time can be prevented.
An air filter 14 is disposed outside the filler opening 12 to cover the filler opening 12.
The air filter 14 mainly has two functions: firstly, in order to prevent external impurities from floating into the heat-preservation oil tank 11 along with the oil feeding port 12 and affecting the quality of hydraulic oil; secondly, because the overflow and dispersion of the hydraulic oil are volatilized, a small amount of oil gas can overflow from the oil filling port 12, and the air filter 14 can filter the oil gas, thereby not only reducing the consumption of the hydraulic oil, but also preventing the pollution to the environment.
The low temperature pressure measuring unit 20 includes:
the device comprises a heat insulation shell 21 with an inner cavity, wherein a top cover plate 22 is sealed at the top of the heat insulation shell 21, an evaporator 23 and an oil storage chamber 24 are arranged in the inner cavity of the heat insulation shell 21, the evaporator 23 is coiled at the periphery of the oil storage chamber 24, an oil inlet 25 and an oil outlet 26 which are communicated with the oil storage chamber 24 are arranged on the side surface of the heat insulation shell 21, and a liquid inlet and a liquid outlet 8 which are communicated with the evaporator 23 and used for conducting condensate are also arranged;
and a stirrer 29 inserted into the oil storage chamber 24 through the top cover plate 22, wherein the stirrer 29 has at least two parts arranged along the longitudinal direction of the top cover plate 22.
An oil inlet detector 90 is arranged between the oil inlet main path 40 and the valve body tool 60, and the oil inlet detector 90 comprises a pressure gauge 91, a pressure sensor 92 and a temperature sensor 93 which are communicated with each other.
The first high temperature branch 41 and the first low temperature branch 42 are provided with check valves 43. In order to prevent the oil from flowing backward into the pipeline during oil inlet, a check valve 43 is arranged.
The invention adopts a heat transfer mode to cool so as to obtain low-temperature oil. The condensate enters from the liquid inlet and flows out along with the evaporator and the liquid outlet and circulates. Because the evaporator is coiled outside the oil storage chamber, the oil in the oil storage chamber is uniformly cooled. The invention is provided with the openable top cover plate, and the cover plate can be opened at any time to observe the condition in the heat insulation shell or add oil.
An oil collecting hole 230 is formed in the top of the detection chamber 30, and an oil mist collector 240 is communicated with the outside of the oil collecting hole 230. When the oil mist in the inspection chamber 30 overflows, it is collected by the oil mist collector 240.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The high-low temperature comprehensive test bed for the valve body of the automatic transmission of the automobile is characterized by comprising a test cabin assembly and a detection device arranged in the test cabin assembly, wherein the test cabin assembly comprises a high-temperature pressure supply cabin, a low-temperature pressure supply cabin and a detection cabin, and the detection device comprises a high-temperature pressure measuring unit, a low-temperature pressure measuring unit, an oil inlet main path and an oil outlet main path;
the high-temperature pressure measuring unit is arranged in the high-temperature pressure supply cabin, the low-pressure measuring unit is arranged in the low-temperature pressure supply cabin, and the detection cabin is arranged between the high-temperature and first pressure supply cabins and is communicated with the high-temperature and low-temperature pressure measuring units;
one end of the oil inlet main path is communicated with the detection cabin, and the other end of the oil inlet main path is branched into a first high-temperature branch and a first low-temperature branch which are respectively communicated with the high-temperature pressure measuring unit and the low-temperature pressure measuring unit;
one end of the oil outlet main line is communicated with the detection cabin, a second high-temperature branch and a second low-temperature branch are branched from the other end of the oil outlet main line and are respectively communicated with the high-temperature pressure measuring unit and the low-temperature pressure measuring unit, and a first three-way valve is arranged at the junction of the second high-temperature branch and the second low-temperature branch.
2. The high-low temperature comprehensive test bed for the automobile automatic transmission valve body according to claim 1, wherein a valve body tool for clamping a valve body to be tested is arranged in the detection cabin, and two ends of the valve body tool are respectively connected and communicated with the oil inlet main path and the oil outlet main path in a sealing manner.
3. The high-low temperature comprehensive test bed for the valve body of the automatic transmission of the automobile according to claim 1, wherein an opening is formed in the bottom of the detection cabin, an oil receiving disc is externally connected to the detection cabin, an oil leakage main is connected to the bottom of the oil receiving disc, a third high-temperature branch and a third low-temperature branch are branched from the other end of the oil leakage main and are respectively communicated with the high-temperature pressure measuring unit and the low-temperature pressure measuring unit, and a second three-way valve is arranged at the junction of the third high-temperature branch and the third low-temperature branch.
4. The high and low temperature integrated test bench for the valve body of the automatic transmission of an automobile according to claim 1, wherein the high temperature pressure measuring unit comprises:
the heat-insulating oil tank is internally provided with a cavity, the top of the heat-insulating oil tank is provided with an oil filling port, the bottom of the heat-insulating oil tank is provided with a pump oil outlet, the pump oil outlet is communicated with the first high-temperature branch through an oil pipe, and the oil filling port is externally provided with an air filter capable of covering the oil filling port;
the liquid level meter penetrates through the upper surface of the heat-preservation oil tank and extends into the cavity;
the stirrer comprises a stirring motor arranged on the upper surface of the heat-insulating oil tank and a stirring head which is arranged in the cavity and driven by the stirring motor;
the heater comprises 3 to 5 heating rods arranged in parallel, and the heating rods extend from the bottom of the heat-insulating oil tank to the inside of the cavity.
5. The high and low temperature integrated test bench for the valve body of the automatic transmission of an automobile according to claim 1, wherein the low temperature pressure measuring unit comprises:
the evaporator is coiled on the periphery of the oil storage chamber, an oil inlet and an oil outlet which are communicated with the oil storage chamber are formed in the side surface of the heat insulation shell, and a liquid inlet and a liquid outlet which are communicated with the evaporator and are used for conducting condensate are also formed in the side surface of the heat insulation shell;
the oil storage chamber is characterized by further comprising two stirrers, the stirrers penetrate through the top cover plate and are inserted into the oil storage chamber, and the stirrers are arranged along the long edge direction of the top cover plate.
6. The high-low temperature comprehensive test bed for the automobile automatic transmission valve body according to claim 1, wherein an oil inlet detector is arranged between the oil inlet main way and the valve body tool, and the oil inlet detector comprises a pressure gauge, a pressure sensor and a temperature sensor which are communicated with each other.
7. The high-low temperature comprehensive test bed for the valve body of the automatic transmission of the automobile as claimed in claim 1, wherein the first high-temperature branch and the first low-temperature branch are provided with check valves.
8. The high-low temperature comprehensive test bed for the automobile automatic transmission valve body according to claim 1, wherein an oil collecting hole is formed in the top of the detection chamber, and an oil mist collector is communicated with the oil collecting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011420137.4A CN112461530A (en) | 2020-12-08 | 2020-12-08 | High-low temperature comprehensive test bed for automobile automatic transmission valve body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011420137.4A CN112461530A (en) | 2020-12-08 | 2020-12-08 | High-low temperature comprehensive test bed for automobile automatic transmission valve body |
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| Publication Number | Publication Date |
|---|---|
| CN112461530A true CN112461530A (en) | 2021-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011420137.4A Pending CN112461530A (en) | 2020-12-08 | 2020-12-08 | High-low temperature comprehensive test bed for automobile automatic transmission valve body |
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Application publication date: 20210309 |