CN115406651B - Hybrid power transmission anti-sintering test device and method - Google Patents
Hybrid power transmission anti-sintering test device and method Download PDFInfo
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- CN115406651B CN115406651B CN202211049856.9A CN202211049856A CN115406651B CN 115406651 B CN115406651 B CN 115406651B CN 202211049856 A CN202211049856 A CN 202211049856A CN 115406651 B CN115406651 B CN 115406651B
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- 238000005245 sintering Methods 0.000 title claims abstract description 54
- 238000012360 testing method Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000005540 biological transmission Effects 0.000 title claims description 38
- 230000007613 environmental effect Effects 0.000 claims abstract description 23
- 238000011084 recovery Methods 0.000 claims abstract description 11
- 239000010687 lubricating oil Substances 0.000 claims description 29
- 238000010998 test method Methods 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims 1
- 238000012795 verification Methods 0.000 abstract description 20
- 238000010248 power generation Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000009766 low-temperature sintering Methods 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 230000004075 alteration Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012544 monitoring process 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
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
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Abstract
本发明公开了混合动力变速箱抗烧结试验装置及方法，涉及变速箱技术领域。本发明的第三测功机连接变速箱的驱动电机输入轴时，第一测功机和第二测功机用于转速控制，第三测功机用于扭矩控制，第三测功机从驱动电机输入轴输入扭矩至差速器，环境仓、第一测功机、第二测功机、第三测功机、第一驱动轴、第二驱动轴可以共同完成纯电驱动工况或制动能量回收工况下变速箱的低温抗烧结试验，用于验证驱动电机输入轴‑中间轴‑差速器齿轮和轴承是否正常，变速箱低温抗烧结试验方便实现、验证结果可靠性高。
The present invention discloses a hybrid gearbox anti-sintering test device and method, and relates to the technical field of gearboxes. When the third dynamometer of the present invention is connected to the input shaft of the drive motor of the gearbox, the first dynamometer and the second dynamometer are used for speed control, and the third dynamometer is used for torque control. The third dynamometer inputs torque from the drive motor input shaft to the differential. The environmental chamber, the first dynamometer, the second dynamometer, the third dynamometer, the first drive shaft, and the second drive shaft can jointly complete the low-temperature anti-sintering test of the gearbox under pure electric drive conditions or brake energy recovery conditions, which is used to verify whether the drive motor input shaft-intermediate shaft-differential gears and bearings are normal. The low-temperature anti-sintering test of the gearbox is easy to implement and the verification result is highly reliable.
Description
Technical Field
The invention relates to the technical field of hybrid power gearboxes, in particular to a device and a method for testing sintering resistance of a hybrid power gearbox.
Background
In very low temperature environments, such as-40 ℃, the viscosity of the lubricating oil in the hybrid gearbox can be very high, which can easily cause the gears or bearings of the gearbox to be glued, resulting in sintering of the gearbox. When the development of the gearbox is completed, the low-temperature sintering resistance of the gearbox needs to be verified so as to improve the gearbox in time when the low-temperature sintering resistance of the gearbox is not qualified. At present, the industry mostly adopts the whole vehicle to carry out the test of low-temperature sintering resistance of the gearbox in the real environment, and the problem of inconvenient test exists, so that the development period of the gearbox is long.
Disclosure of Invention
The invention solves the technical problem that the low-temperature anti-sintering test of the hybrid power gearbox is inconvenient in the prior art by providing the anti-sintering test device and the anti-sintering test method of the hybrid power gearbox.
On one hand, the embodiment of the invention provides the following technical scheme:
The anti-sintering test device for the hybrid power gearbox comprises an environment bin, a first dynamometer, a second dynamometer, a third dynamometer, a first driving shaft, a second driving shaft and a temperature sensor;
The gearbox is arranged in the environment bin, lubricating oil with preset oil quantity is filled in the environment bin, and the environment bin is used for controlling the temperature of the lubricating oil;
The first dynamometer is connected with the first end of the differential mechanism of the gearbox through the first driving shaft, the second dynamometer is connected with the second end of the differential mechanism of the gearbox through the second driving shaft, and the third dynamometer is suitable for being connected with the input shaft of the driving motor of the gearbox;
The temperature sensor is arranged in the environment bin and is used for detecting the temperature of lubricating oil.
Preferably, the anti-sintering test device of the hybrid gearbox further comprises a fourth dynamometer;
the fourth dynamometer is connected with an engine input shaft of the gearbox.
Preferably, the third dynamometer is further adapted for connection to a generator input shaft of the gearbox.
On the other hand, the embodiment of the invention also provides the following technical scheme:
a hybrid transmission anti-sintering test method, applied to the hybrid transmission anti-sintering test device above, comprising:
The environment bin controls the temperature of lubricating oil in the environment bin to a preset temperature, wherein the preset temperature is lower than zero ℃;
When the pure electric driving working condition or the sintering resistance test under the braking energy recovery working condition is carried out on the gearbox, the first dynamometer and the second dynamometer respectively carry out preset rotating speed control on rotating speed circulation of the first driving shaft and rotating speed circulation of the second driving shaft, and meanwhile, the third dynamometer carries out preset torque control on torque circulation of the driving motor input shaft of the gearbox until the temperature of lubricating oil in the environment bin reaches zero ℃.
Preferably, the preset rotation speed control is as follows:
starting from the current moment, firstly controlling the rotation speed of a driving shaft to be changed into a first rotation speed after a first time period passes from zero, then controlling the rotation speed of the driving shaft to be changed into a second rotation speed after a second time period passes from the first rotation speed, and finally controlling the rotation speed of the driving shaft to be changed into zero after a third time period passes from the second rotation speed;
The first rotating speed is the rotating speed of the driving motor corresponding to the highest vehicle speed of the peak torque maintained in the pure electric mode, and the second rotating speed is the rotating speed of the driving motor corresponding to the highest vehicle speed in the pure electric mode.
Preferably, the preset torque control is:
And from the current moment, firstly controlling the torque of the driving motor input shaft to be changed into the driving motor peak torque after the first time period passes from zero, then controlling the torque of the driving motor input shaft to be changed into the torque corresponding to the driving motor peak power after the second time period passes from the driving motor peak torque, and finally controlling the torque of the driving motor input shaft to be changed into the braking energy recovery highest torque after the third time period passes from the torque corresponding to the driving motor peak power.
Preferably, the first time period is 2.5min, the second time period is 2.5min, and the third time period is 0.25min.
Preferably, the anti-sintering test device of the hybrid gearbox further comprises a fourth dynamometer, wherein the fourth dynamometer is connected with an engine input shaft of the gearbox;
The environment bin controls the temperature of lubricating oil in the environment bin to a preset temperature, and after the preset temperature is lower than zero ℃, the environment bin further comprises:
When the anti-sintering test is carried out on the gearbox under the direct engine driving working condition, under each gear, the first dynamometer and the second dynamometer respectively control the rotating speeds of the first driving shaft and the second driving shaft to be kept at the engine rotating speeds corresponding to the highest gear speed, and meanwhile, the fourth dynamometer controls the torque of the engine input shaft to be kept at the engine external characteristic torque corresponding to the engine rotating speeds until the temperature of lubricating oil in the environmental bin reaches zero ℃.
Preferably, the anti-sintering test device of the hybrid power gearbox further comprises a fourth dynamometer, wherein the fourth dynamometer is connected with an engine input shaft of the gearbox;
The environment bin controls the temperature of lubricating oil in the environment bin to a preset temperature, and after the preset temperature is lower than zero ℃, the environment bin further comprises:
when the anti-sintering test is carried out on the gearbox under the parking power generation working condition, the third dynamometer controls the rotating speed of the generator input shaft to be kept at the highest rotating speed used for generating power of the engine, and meanwhile, the fourth dynamometer controls the torque of the engine input shaft to be kept at the engine external characteristic torque corresponding to the highest rotating speed until the temperature of lubricating oil in the environment bin reaches zero ℃.
Preferably, the preset temperature is-40 ℃.
The technical scheme provided by the invention has at least the following technical effects or advantages:
When the third dynamometer is connected with the driving motor input shaft of the gearbox, the first dynamometer and the second dynamometer are used for rotating speed control, the third dynamometer is used for torque control, the third dynamometer inputs torque from the driving motor input shaft to the differential, the environment bin, the first dynamometer, the second dynamometer, the third dynamometer, the first driving shaft and the second driving shaft can jointly complete a low-temperature sintering resistance test of the gearbox under a pure electric driving working condition or a braking energy recovery working condition, the low-temperature sintering resistance test is used for verifying whether the driving motor input shaft, the middle shaft and the differential gear are normal or not, the gearbox low-temperature sintering resistance test is convenient to realize, and the reliability of a verification result is high.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural diagram of a hybrid transmission anti-sintering test device in an embodiment of the invention;
FIG. 2 is a schematic diagram of a part of a test device for testing the anti-sintering performance of a hybrid transmission in an embodiment of the invention;
FIG. 3 is a partial flow chart of a hybrid transmission anti-seize test method in accordance with an embodiment of the present invention;
FIG. 4 is a schematic diagram of a portion of a hybrid transmission anti-sintering test method according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of another part of a hybrid transmission anti-sintering test device according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of another portion of a hybrid transmission anti-seize test method in accordance with an embodiment of the present invention;
FIG. 7 is a schematic diagram of another part of a hybrid transmission anti-sintering test device according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of another portion of a hybrid transmission anti-seize test method in accordance with an embodiment of the invention.
Reference numerals illustrate:
1-an environment bin, 2-a gearbox, 21-a first end of a differential mechanism, 22-a second end of the differential mechanism, 23-a driving motor input shaft, 24-an engine input shaft, 25-an electric generator input shaft, 26-a first synchronizer, 27-a second synchronizer, 28-a gear shifting system, 3-a first dynamometer, 31-a torque flange of the first dynamometer, 32-a first driving shaft, 4-a second dynamometer, 41-a torque flange of the second dynamometer, 42-a second driving shaft, 5-a third dynamometer, 51-a torque flange of the third dynamometer, 6-a fourth dynamometer, 61-a torque flange of the fourth dynamometer and 7-a temperature sensor.
Detailed Description
The embodiment of the invention solves the technical problem that the low-temperature anti-sintering test of the hybrid power gearbox is inconvenient in the prior art by providing the anti-sintering test device and the anti-sintering test method of the hybrid power gearbox.
In order to better understand the technical scheme of the present invention, the following detailed description will refer to the accompanying drawings and specific embodiments.
In a hybrid vehicle, a gearbox can realize various hybrid functions through different power coupling modes of an engine and a motor, such as pure electric drive, direct engine drive, braking energy recovery, parking power generation and the like.
The pure electric driving mode is adopted when the electric quantity of the power battery is sufficient and the power requirement is small (such as light acceleration or stable vehicle speed), and the pure electric driving mode is adopted, wherein the engine is at rest, the generator runs idle and the driving motor is driven;
The braking energy recovery mode is that when a brake pedal is stepped on or an accelerator pedal is released, the engine stops working, the driving motor works in a power generation mode, kinetic energy is converted into electric energy to charge a battery, and at the moment, the engine does not work, the generator idles, and the driving motor generates power;
the engine direct drive mode is a pure engine drive working mode in the high-speed mode, and at the moment, the engine drives, the generator idles and the driving motor idles;
in the parking power generation mode, if the electric quantity of the battery is low, the engine is started to drive the generator to charge the battery, and at the moment, the engine works, the generator generates power and the driving motor is stationary.
As shown in fig. 1, the anti-sintering test device for the hybrid gearbox of the embodiment comprises an environment bin 1, a first dynamometer 3, a second dynamometer 4, a third dynamometer 5, a first driving shaft 32, a second driving shaft 42 and a temperature sensor 7;
The gearbox 2 is arranged in the environment bin 1, lubricating oil with preset oil quantity is filled in the environment bin 1, and the environment bin 1 is used for controlling the temperature of the lubricating oil;
The first dynamometer 3 is connected to the first end 21 of the differential of the gearbox 2 via a first drive shaft 32, the second dynamometer 4 is connected to the second end 22 of the differential of the gearbox 2 via a second drive shaft 42, and the third dynamometer 5 is adapted to be connected to the drive motor input shaft 23 of the gearbox 2;
a temperature sensor 7 is placed in the environmental chamber 1, and the temperature sensor 7 is used for detecting the temperature of the lubricating oil.
The lubrication condition of the preset oil quantity and the lubricating oil in the environment bin 1 to the gearbox 2 is consistent with that of a real vehicle. The third dynamometer 5 is a high-speed dynamometer, and the third dynamometer 5 is suitable for being connected with the driving motor input shaft 23 of the gearbox 2, which means that the third dynamometer 5 may be connected with the driving motor input shaft 23 of the gearbox 2 or may not be connected with the driving motor input shaft 23 of the gearbox 2. In the process of controlling the temperature of the lubricating oil by the environmental chamber 1, the temperature sensor 7 is required to feed back the temperature of the lubricating oil.
In this embodiment, when the third dynamometer 5 is connected to the driving motor input shaft 23 of the gearbox 2, the environmental chamber 1, the first dynamometer 3, the second dynamometer 4, the third dynamometer 5, the first driving shaft 32, and the second driving shaft 42 may jointly complete a low-temperature anti-sintering test of the gearbox 2 under a pure electric driving condition or a braking energy recovery condition, so as to verify whether the driving motor input shaft-intermediate shaft-differential gear and the bearing are normal, as shown in fig. 2.
In order to verify whether the input shaft, the intermediate shaft and the differential gear and the bearing of the driving motor are normal, as shown in fig. 3, the embodiment also provides a method for testing the anti-sintering performance of the hybrid gearbox, which comprises the following steps:
step S1, controlling the temperature of lubricating oil in an environmental chamber 1 to a preset temperature by the environmental chamber 1, wherein the preset temperature is lower than zero ℃;
Step S2, when performing an anti-sintering test under a pure electric driving condition or a braking energy recovery condition on the gearbox 2, the first dynamometer 3 and the second dynamometer 4 respectively perform preset rotational speed control on the rotational speed cycles of the first driving shaft 32 and the second driving shaft 42, and simultaneously the third dynamometer 5 performs preset torque control on the torque cycle of the driving motor input shaft 23 until the temperature of the lubricating oil in the environmental bin 1 reaches zero ℃.
It will be appreciated that the first and second dynamometers 3, 4 of figure 2 are for rotational speed control, the third dynamometer 5 is for torque control, and the third dynamometer 5 inputs torque from the drive motor input shaft 23 to the differential.
In step S1, the preset temperature may be-40 ℃ to design a boundary for the oil temperature developed by the transmission 2.
In step S2, the rotational speed control and the torque control are performed synchronously, and the rotational speed control of the first dynamometer 3 on the first drive shaft 32 and the rotational speed control of the second dynamometer 4 on the second drive shaft 42 are identical and synchronous.
The preset rotation speed control may have various strategies, and in this embodiment, the preset rotation speed control is preferably:
And finally, controlling the rotation speed of the driving shaft to become zero after the second rotation speed passes through a third time, wherein the first rotation speed is the rotation speed of the driving motor corresponding to the highest vehicle speed of the pure electric mode and keeping the peak torque, and the second rotation speed is the rotation speed of the driving motor corresponding to the highest vehicle speed of the pure electric mode.
Among them, there may be various strategies for the preset torque control, and in this embodiment, the preset torque control is preferably:
From the current moment, the torque of the driving motor input shaft 23 is controlled to be changed into the driving motor peak torque after the first time period passes from zero, the torque of the driving motor input shaft 23 is controlled to be changed into the torque corresponding to the driving motor peak power after the second time period passes from the driving motor peak torque, and finally the torque of the driving motor input shaft 23 is controlled to be changed into the braking energy recovery highest torque after the third time period passes from the torque corresponding to the driving motor peak power.
The first time period may be 2.5min, the second time period may be 2.5min, and the third time period may be 0.25min.
The specific procedure of step S2 is shown in fig. 4. The process of steps S1-S2 may of course be repeated a number of times (e.g. 3 times) to improve the reliability of the verification results of the drive motor input shaft-intermediate shaft-differential gear and bearings.
It can be understood that the above test conditions of the preset rotation speed control and the preset torque control are relatively strict, and after the practical verification, the embodiment adopts the above preset rotation speed control and the above preset torque control to verify the input shaft-intermediate shaft-differential gear and the bearing of the driving motor, if the verification is passed, the transmission of the real vehicle does not cause sintering problems in the input shaft-intermediate shaft-differential gear and the bearing of the driving motor in a low-temperature environment, so that the verification method in the embodiment has high reliability.
Of course, the embodiment also needs to complete the low-temperature anti-sintering test of the gearbox 2 under the direct-drive working condition of the engine, and is used for verifying whether the input shaft, the intermediate shaft and the differential gear and the bearing of the engine are normal. For this purpose, as shown in fig. 1, the hybrid transmission anti-sintering test device according to the preferred embodiment further includes a fourth dynamometer 6, and the fourth dynamometer 6 is connected to the engine input shaft 24 of the transmission 2. The environment bin 1, the first dynamometer 3, the second dynamometer 4 and the fourth dynamometer 6 can jointly complete a low-temperature anti-sintering test of the gearbox 2 under the direct-drive working condition of the engine, and the low-temperature anti-sintering test is used for verifying whether an input shaft, an intermediate shaft, a differential gear and a bearing of the engine are normal or not, as shown in fig. 5.
To verify whether the engine input shaft-intermediate shaft-differential gear and bearings are normal, after step S1, the hybrid transmission anti-seize test method of the present embodiment further includes:
When the anti-sintering test is performed on the gearbox 2 under the direct engine driving condition, in each gear, the first dynamometer 3 and the second dynamometer 4 respectively control the rotation speed of the first driving shaft 32 and the second driving shaft 42 to be kept at the engine rotation speed corresponding to the highest gear speed, and meanwhile, the fourth dynamometer 6 controls the torque of the engine input shaft 24 of the gearbox 2 to be kept at the engine external characteristic torque corresponding to the engine rotation speed until the temperature of the lubricating oil in the environmental chamber 1 reaches zero ℃.
It will be appreciated that the first and second dynamometers 3, 4 of fig. 5 are used for rotational speed control, the fourth dynamometer 6 is used for torque control, and the fourth dynamometer 6 inputs torque from the engine input shaft 24 to the differential. The rotational speed control and the torque control are performed synchronously, and the rotational speed control of the first drive shaft 32 by the first dynamometer 3 and the rotational speed control of the second drive shaft 42 by the second dynamometer 4 are identical and synchronous.
A specific procedure for verifying engine input shaft-intermediate shaft-differential gear and bearings is shown in fig. 6. The verification process may of course be repeated multiple times (e.g., 3 times) to improve the reliability of the verification results for the engine input shaft-intermediate shaft-differential gear and bearings.
After the practical verification of the embodiment, the method is adopted to verify the input shaft, the intermediate shaft and the differential gear and the bearing of the engine, and if the verification is passed, the transmission 2 of the real vehicle does not have the problem of sintering of the input shaft, the intermediate shaft and the differential gear and the bearing of the engine in a low-temperature environment, so that the verification method in the embodiment has high reliability.
Of course, the embodiment also needs to complete the low-temperature anti-sintering test of the gearbox 2 under the parking power generation working condition, so as to verify whether the input shaft-generator shaft and the bearing of the engine are normal. For this reason, as shown in fig. 1, the third dynamometer 5 is preferably further adapted to be connected to the generator input shaft 25 of the gearbox 2, i.e. the third dynamometer 5 is connected to the generator input shaft 25 of the gearbox 2, and not to the driving motor input shaft 23, corresponding to the third dynamometer 5 being switchable between the generator input shaft 25 and the driving motor input shaft 23. The environment bin 1, the third dynamometer 5 and the fourth dynamometer 6 can jointly complete a low-temperature anti-sintering test of the gearbox 2 under the parking power generation working condition, and the low-temperature anti-sintering test is used for verifying whether an input shaft-a generator shaft and a bearing of an engine are normal or not, as shown in fig. 7.
To verify whether the engine input shaft-generator shaft and the bearing are normal, after step S1, the anti-sintering test method for the hybrid transmission of the embodiment further includes:
When the anti-sintering test is performed on the gearbox 2 under the parking power generation working condition, the third dynamometer 5 controls the rotation speed of the generator input shaft 25 to be kept at the highest rotation speed used by the engine for power generation, and meanwhile, the fourth dynamometer 6 controls the torque of the engine input shaft 24 of the gearbox 2 to be kept at the external engine characteristic torque corresponding to the highest rotation speed until the temperature of the lubricating oil in the environment bin 1 reaches zero ℃.
It will be appreciated that the third dynamometer 5 of fig. 7 is for speed control, the fourth dynamometer 6 is for torque control, and the fourth dynamometer 6 inputs torque from the engine input shaft 24 to the generator. The rotation speed control and the torque control are performed synchronously.
A specific procedure for verifying the engine input shaft-generator shaft and bearings is shown in fig. 8. The verification process may of course be repeated multiple times (e.g. 3 times) to improve the reliability of the verification results of the engine input shaft-generator shaft and the bearings.
After the practical verification, the method is adopted to verify the input shaft-generator shaft and the bearing of the engine, and if the verification is passed, the transmission 2 of the real vehicle can not cause sintering problem on the input shaft-generator shaft and the bearing of the engine in a low-temperature environment, so that the verification method in the embodiment has high reliability.
As shown in fig. 1, the anti-sintering test device for the hybrid gearbox of the embodiment further comprises a torque flange 31 of the first dynamometer, a torque flange 41 of the second dynamometer, a torque flange 51 of the third dynamometer and a torque flange 61 of the fourth dynamometer, and is used for monitoring the torque in the test process. The gearbox 2 further comprises a first synchronizer 26, a second synchronizer 27 and a gear shifting system 28 supporting different operating modes and gear shifting.
In the verification process of the present embodiment, the technician can determine the verification result by observing the vibration, burnout condition of the transmission, or disassemble the transmission to observe the verification result after the verification is completed.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (7)
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| CN118310743B (en) * | 2024-01-26 | 2024-11-15 | 捷孚瑞(常州)新能源汽车科技有限公司 | Static torsion strength testing device and testing method for hybrid gearbox |
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| CN211527822U (en) * | 2020-02-12 | 2020-09-18 | 中国第一汽车股份有限公司 | Device for bench test of automatic transmission parking system |
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| JP5884160B2 (en) * | 2011-12-07 | 2016-03-15 | Ｊｆｅスチール株式会社 | Performance analysis method of motor for hybrid vehicle |
| KR102190153B1 (en) * | 2012-10-12 | 2020-12-11 | 고쿠사이 게이소쿠키 가부시키가이샤 | Torsion testing device |
| CN110333072A (en) * | 2019-08-01 | 2019-10-15 | 吉孚动力技术(中国)有限公司 | A hybrid transmission test bench |
| CN113092107B (en) * | 2021-04-25 | 2023-05-19 | 重庆清研理工汽车检测服务有限公司 | Test bench for oil-electricity hybrid power gearbox |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN210665054U (en) * | 2019-08-01 | 2020-06-02 | 吉孚动力技术(中国)有限公司 | Hybrid power gearbox test bench |
| CN211527822U (en) * | 2020-02-12 | 2020-09-18 | 中国第一汽车股份有限公司 | Device for bench test of automatic transmission parking system |
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