CN113915247B - Automatic control device for AMT chassis power takeoff - Google Patents
Automatic control device for AMT chassis power takeoff Download PDFInfo
- Publication number
- CN113915247B CN113915247B CN202111245669.3A CN202111245669A CN113915247B CN 113915247 B CN113915247 B CN 113915247B CN 202111245669 A CN202111245669 A CN 202111245669A CN 113915247 B CN113915247 B CN 113915247B
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- China
- Prior art keywords
- hydraulic
- shell
- pneumatic
- power takeoff
- control valve
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- 238000004891 communication Methods 0.000 claims abstract description 3
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 claims description 2
- 230000001934 delay Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 20
- 239000010720 hydraulic oil Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D48/00—External control of clutches
- F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
- F16D48/066—Control of fluid pressure, e.g. using an accumulator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D25/00—Fluid-actuated clutches
- F16D25/12—Details not specific to one of the before-mentioned types
- F16D25/14—Fluid pressure control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/10—System to be controlled
- F16D2500/102—Actuator
- F16D2500/1026—Hydraulic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/10—System to be controlled
- F16D2500/102—Actuator
- F16D2500/1028—Pneumatic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/10—System to be controlled
- F16D2500/104—Clutch
- F16D2500/10406—Clutch position
- F16D2500/10418—Accessory clutch, e.g. cooling fan, air conditioning
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/30—Signal inputs
- F16D2500/302—Signal inputs from the actuator
- F16D2500/3024—Pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/50—Problem to be solved by the control system
- F16D2500/51—Relating safety
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/70—Details about the implementation of the control system
- F16D2500/702—Look-up tables
- F16D2500/70205—Clutch actuator
- F16D2500/70217—Pressure
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
Abstract
The invention relates to an automatic control device of an AMT chassis power takeoff, which comprises an upper control module, a pneumatic control valve of the power takeoff and a TCU control module which are respectively in communication connection; the pneumatic control valve of the power takeoff is communicated with the hydraulic-pneumatic safety valve through an air pipe; the power takeoff is connected with the pneumatic control valve of the power takeoff through an air pipe, a hydraulic-pneumatic safety valve is arranged between the air taking port of the chassis and the air inlet of the pneumatic control valve of the power takeoff, and an oil pipe joint of the hydraulic-pneumatic safety valve is connected with the upper hydraulic pump. The work starts, and a worker directly controls the loading module to disconnect the clutch; the loading control module delays for 3S after sending the pneumatic control valve of the power take-off to the TCU, the pneumatic control valve of the power take-off is closed, the power take-off is successfully meshed under the condition of sufficient air pressure, the loading can start to construct, and the power take-off sequence is the same as the above. The hydraulic-pneumatic safety valve is used in emergency situations, and the safety of the whole system and even the whole vehicle can be ensured without personnel operation.
Description
The invention relates to an automatic control device for an AMT chassis power takeoff, and belongs to the technical field.
Background
The power takeoff is a common power takeoff in the special vehicle industry, and the on-off problem of the power takeoff can be generally realized through wiredrawing and pneumatic control. In the past, the power takeoff is generally arranged in a cab by a switch, when the power takeoff is needed to be used for loading, a worker needs to step on a clutch in the cab, the power takeoff switch is connected, and after the power takeoff is meshed, the loaded part can be formally operated. Meanwhile, the power takeoff is separated by a worker entering the cab, stepping on the clutch and turning off the power takeoff switch, so that the power takeoff can be turned off. Many vehicles are operated outside the cab, which can lead to frequent access to the cab for operation of the power take-off device when the worker is required to operate, particularly for certain vehicles, and frequent normal driving and loading operations, such as a compressed garbage truck, are required. Thus, the working strength of workers is greatly increased, and the working efficiency is reduced. Meanwhile, misoperation that a worker forgets to disconnect the power take-off device and drives the vehicle normally can occur, so that the power take-off device is overloaded to damage, and even the possibility of damage to a gearbox and an engine lamp is caused. Moreover, the engagement and the separation of the power take-off device can be operated only by entering the cab, the whole vehicle has sudden faults, and workers cannot enter the cab in time to disconnect the power take-off device, so that serious accidents are caused.
Disclosure of Invention
The invention aims at: an automatic control device for an AMT chassis power takeoff is provided.
In order to achieve the above object, the technical scheme of the invention is as follows: an automatic control device of an AMT chassis power takeoff comprises an upper control module, wherein the upper control module is respectively connected with a pneumatic control valve of the power takeoff and a TCU control module in a communication way;
the pneumatic control valve of the power takeoff is communicated with the hydraulic-pneumatic safety valve through an air pipe;
the power takeoff is connected with the pneumatic control valve of the power takeoff through an air pipe, a hydraulic-pneumatic safety valve is arranged between the air taking port of the chassis and the air inlet of the pneumatic control valve of the power takeoff, and an oil pipe joint of the hydraulic-pneumatic safety valve is connected with an upper oil loading pump.
When the work starts, a worker can directly control the loading module, namely, a power supply main switch of the control module is turned on, after the switch is engaged, the TCU receives a signal and then sends an instruction to the control executing mechanism to disconnect the clutch; meanwhile, a clutch opening signal is fed back to the loading control module, after the loading control module receives the signal, a sending instruction is sent to the power take-off switch control valve, the power take-off control valve is connected, the power take-off is successfully hung, and the system starts to work normally. If the clutch is not fully opened, no signal will be sent to the load control module, and the power take-off switch cannot be opened, and the power take-off cannot be engaged. The design mainly prevents the clutch from being directly hung on the power take-off because the clutch is not safely opened, and at the moment, the phenomenon of tooth striking between the power take-off and the gearbox can be caused, and even the power take-off or the gearbox teeth are damaged. The sequence of disconnecting the power take-off is the same as above. The hydraulic-pneumatic safety valve is used in emergency situations, and the safety of the whole system and even the whole vehicle can be ensured without personnel operation.
Further, the hydraulic-pneumatic safety valve mainly comprises a shell and an upper shell fixed on the side wall of the shell, a high-pressure gas channel is arranged in the upper shell, one end of the high-pressure gas channel is connected with a chassis gas taking port, and the other end of the high-pressure gas channel is communicated with the pneumatic control valve of the power takeoff through a pipeline; a sliding block for controlling the on-off of the high-pressure gas channel is arranged at the joint of the shell and the upper shell; the hydraulic balance device mainly comprises a push rod, an oil inlet cavity, a spring and a pressure regulating device which are sequentially assembled in the shell, wherein one end of the push rod is abutted to a first opening of the shell, and the pressure regulating device is fastened on a second opening of the shell; the first opening is connected with the upper hydraulic pump through a pipeline. The pressure regulating device sets initial pressure according to the actual demand pressure of the hydraulic pump, and the hydraulic-pneumatic safety valve starts to act when the pressure of the hydraulic pump exceeds the preset pressure. The hydraulic oil pressure in the oil pipe joint is larger than the initial pressure, the push rod compresses the spring under the action of the initial pressure, when the spring is compressed to the position where the oil inlet cavity is coincident with the sliding block oil cavity, the sliding block at the moment is pushed upwards under the action of the shell hydraulic pressure and blocks the air outlet joint, the pneumatic control valve of the power takeoff is not input by an air source to return, the power takeoff is disconnected, and the gear pump stops working. Meanwhile, the pressure sensor sends a signal to the upper control module so as to disconnect the clutch, and the clutch is disconnected after the clutch is disconnected because the process of the air path is slightly slower than that of the electromagnetic valve.
When the pressure of the upper hydraulic pump is smaller than the initial pressure, the oil inlet cavity and the push rod return to the original position under the action of the spring, meanwhile, the sliding block naturally falls under the action of gravity, the air outlet connector is communicated with the air inlet connector again, and the next whole system operation is facilitated.
Further, the push rod is connected with the oil inlet cavity and moves simultaneously, the shell is integrally connected with the upper shell, the sliding block is arranged in a channel between the upper shell and the shell, and a sealing ring is arranged between the sliding block and the channel for sealing. The sealing ring between the upper shell and the sliding block ensures that hydraulic oil in the shell cannot enter the upper shell, so that the product is damaged.
Further, the sealing ring is installed inside the upper housing.
Further, the oil pipe joint is directly installed on the first opening of the shell.
Further, the air inlet joint and the air outlet joint are installed on the upper shell through threads, so that the installation is convenient.
Further, the pressure adjusting means is mounted on the housing by means of threads, which is to facilitate the mounting.
Drawings
The invention is described in further detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a schematic diagram of an AMT chassis power takeoff automatic control device;
FIG. 2 is a schematic diagram of the operation of an AMT chassis power takeoff automatic control device;
FIG. 3 is a schematic illustration of a hydraulic-pneumatic relief valve;
fig. 4 shows the operation state when the pressure exceeds the preset pressure.
FIG. 5 is a logic diagram of automatic control of the power take-off
In the figure: 1. a TCU control module; 2. an actuator; 3. a clutch; 4. pneumatic control valve of power takeoff; 5. a power take-off; 6. a pressure sensor; 7. a control module is arranged on the upper part; 8. loading a hydraulic pump; 9. a chassis air taking port; 10. an air outlet joint; 11. an air inlet joint; 12. the pneumatic control valve air inlet of the power takeoff; 13. a hydraulic-pneumatic safety valve; 14. a housing; 15. a push rod; 16. an air pipe; 17. an upper housing; 18. a jackscrew; 19. a sliding block; 20. a pressure regulating device; 21. a spring; 22. an oil inlet cavity; 23. a seal ring; 24. an oil pipe joint; 25. hydraulic oil.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the accompanying drawings:
an automatic control device for an AMT chassis power takeoff can effectively solve the problems.
The invention discloses an automatic control device of an AMT chassis power takeoff, which mainly comprises a TCU control module 1 of a chassis, an AMT actuator 2, a clutch 3, a power takeoff pneumatic control valve 4, a hydraulic-pneumatic safety valve 13, a power takeoff 5, a pressure sensor 6, an upper control module 7, an air pipe 16, a chassis air taking port 9 and the like. The hydraulic-pneumatic safety valve 13 consists of a shell 14, a push rod 15, an air pipe 16, an upper shell 17, a jackscrew 18, a sliding block 19, a pressure regulating device 20, a spring 21, an oil inlet cavity 22, a sealing ring 23, an oil pipe joint 24 and hydraulic oil 25. The oil pipe joint 24 is directly installed on the shell 14, the push rod 15 and the oil inlet cavity 22 are connected together and move simultaneously, the shell 14 and the upper shell 17 are integrally connected, the sliding block 19 is sealed with the middle of the upper shell 17 and the shell 14, and the sealing ring 23 is installed inside the upper shell 17.
The air inlet joint 11 and the air outlet joint 10 are installed on the upper shell 17 through threads.
The jackscrew 18 is mounted inside a pressure regulating device 20, and the pressure regulating device 20 is threadedly mounted on the housing 14.
The power takeoff 5 is connected with the power takeoff pneumatic control valve 4 through an air pipe 16, a hydraulic-pneumatic safety valve 13 is arranged between the chassis air taking port 9 and the power takeoff pneumatic control valve air inlet 12, and meanwhile, a hydraulic oil port of the hydraulic-pneumatic safety valve 13 is connected with an upper oil loading pump.
When the work starts, a worker directly controls the uploading control module 7, namely, a power supply main switch of the uploading control module 7 is opened, after the switch is engaged, the TCU control module 1 receives a signal and then sends an instruction to the executor 2 to disconnect the clutch 3; when the clutch is completely opened, a signal is fed back to the loading control module 7, after the control module 7 receives the signal, a sending instruction is sent to the power takeoff pneumatic control valve 4 to be closed, the power takeoff control valve is connected, the power takeoff 5 is successfully meshed under the condition of sufficient air pressure, the loading can be started to construct, and the order of disconnecting the power takeoff 5 is the same as the above. If the clutch disconnection signal is not input to the upper control module, the power take-off cannot be opened.
The hydro-pneumatic safety valve 13 is used in an emergency situation, and can ensure the safety of the whole system and even the whole vehicle without personnel operation.
The pressure regulating device 20 sets the initial pressure according to the actual demand pressure of the hydraulic pump to be installed, and the preset pressure is set by adjusting the jackscrew 18, and the hydraulic-pneumatic relief valve 13 starts to act once the pressure of the hydraulic pump to be installed exceeds the preset pressure. The push rod 15 is provided with an upper hydraulic pump pressure on the left side and a set initial pressure on the right side, at the moment, the hydraulic oil pressure in the oil pipe joint is larger than the initial pressure, the push rod 15 compresses the spring 21 under the action of the upper hydraulic pump pressure, when the spring is compressed to the position that the oil inlet cavity 22 is coincident with the oil cavity of the sliding block 19, the sliding block 19 at the moment pushes upwards under the action of the hydraulic oil pressure of the shell 14 and blocks the air outlet joint 10, the pneumatic control valve 4 of the power takeoff is not provided with an air source to input and returns, the power takeoff is disconnected, and the gear pump stops working. Meanwhile, the pressure sensor 6 sends a signal to the upper control module so as to disconnect the clutch, and the clutch is disconnected after the clutch is disconnected because the process of the air path is slightly slower than that of the electromagnetic wave. If the clutch is not completely opened, the power take-off device is forcibly disconnected so as to ensure the safety of the whole loader and even the whole vehicle.
When the pressure of the hydraulic pump is smaller than the initial pressure, the oil inlet cavity 19 and the push rod 15 return to the original position under the action of the spring 21, meanwhile, the sliding block 19 naturally falls under the action of gravity, and the air outlet connector 11 and the air inlet connector 10 are communicated again, so that the next whole system is convenient to work.
The seal between the upper housing 17 and the slider 19 ensures that hydraulic oil 25 in the housing 14 does not enter the upper housing 17, resulting in product damage.
The foregoing is merely illustrative of the embodiments of the present invention, and the scope of the present invention is not limited thereto, and any person skilled in the art will appreciate that modifications and substitutions are within the scope of the present invention, and the scope of the present invention is defined by the appended claims.
Claims (5)
1. An automatic control device of an AMT chassis power takeoff is characterized in that: the device comprises an upper control module (7), and is respectively connected with a power take-off (5), a power take-off pneumatic control valve (4) and a TCU control module (1) in a communication way;
the pneumatic control valve (4) of the power takeoff is communicated with the hydraulic-pneumatic safety valve (13) through an air pipe (16);
the power takeoff (5) is connected with the power takeoff pneumatic control valve (4) through an air pipe (16), a hydraulic-pneumatic safety valve (13) is arranged between the chassis air taking port (9) and the power takeoff pneumatic control valve air inlet (12), and an oil pipe joint (24) of the hydraulic-pneumatic safety valve (13) is connected with the upper hydraulic pump (8);
the hydraulic-pneumatic safety valve (13) mainly comprises a shell (14) and an upper shell (17) fixed on the side wall of the shell (14), a high-pressure gas channel is arranged in the upper shell (17), one end of the high-pressure gas channel is connected with a chassis gas taking port (9), and the other end of the high-pressure gas channel is communicated with the pneumatic control valve (4) of the power takeoff through a gas pipe; a sliding block (19) for controlling the on-off of the high-pressure gas channel is arranged at the joint of the shell (14) and the upper shell (17); a hydraulic cavity with two open ends is arranged in the shell (14), a hydraulic balance device is arranged in the hydraulic cavity, the hydraulic balance device mainly comprises a push rod (15), an oil inlet cavity (22), a spring (21) and a pressure regulating device (20) which are sequentially assembled in the shell (14), one end of the push rod (15) is abutted to a first opening of the shell (14), and the pressure regulating device (20) is fastened on a second opening of the shell (14); the first opening is connected with an upper hydraulic pump (8) through a pipeline;
the push rod (15) is connected with the oil inlet cavity (22) and moves simultaneously, the shell (14) is integrally connected with the upper shell (17), the sliding block (19) is arranged in a channel between the upper shell (17) and the shell (14), and a sealing ring (23) is arranged between the sliding block (19) and the channel in the middle.
2. The AMT chassis power take-off automatic control device as defined in claim 1, wherein: a seal ring (23) is installed inside the upper case (17).
3. The AMT chassis power take-off automatic control device as defined in claim 1, wherein: the tubing connector (24) is mounted directly to the first opening of the housing (14).
4. The AMT chassis power take-off automatic control device as defined in claim 1, wherein: the air inlet joint (11) and the air outlet joint (10) are arranged on the upper shell (17) through threads.
5. The AMT chassis power take-off automatic control device as defined in claim 1, wherein: the pressure regulating device (20) is mounted on the housing (14) by means of threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111245669.3A CN113915247B (en) | 2021-10-26 | 2021-10-26 | Automatic control device for AMT chassis power takeoff |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111245669.3A CN113915247B (en) | 2021-10-26 | 2021-10-26 | Automatic control device for AMT chassis power takeoff |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113915247A CN113915247A (en) | 2022-01-11 |
| CN113915247B true CN113915247B (en) | 2024-01-12 |
Family
ID=79242916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111245669.3A Active CN113915247B (en) | 2021-10-26 | 2021-10-26 | Automatic control device for AMT chassis power takeoff |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113915247B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2189223Y (en) * | 1993-12-08 | 1995-02-08 | 胜利石油管理局钻井工艺研究院 | Over-pressure protective device |
| JP2003025860A (en) * | 2001-07-13 | 2003-01-29 | Isuzu Motors Ltd | Automatic clutch control type vehicle with pto mechanism |
| CN2913770Y (en) * | 2005-09-27 | 2007-06-20 | 罗献尧 | Venting escape valve |
| CN102180094A (en) * | 2011-04-19 | 2011-09-14 | 北京理工华创电动车技术有限公司 | Method for controlling upper part of special vehicle |
| CN102755706A (en) * | 2012-07-27 | 2012-10-31 | 温州市公安消防支队 | One-key control system for power takeoff device |
| CN103129493A (en) * | 2013-03-12 | 2013-06-05 | 中国重汽集团济南动力有限公司 | Control method and control device used for power takeoff of AMT vehicle |
| CN103303226A (en) * | 2013-06-06 | 2013-09-18 | 东风汽车公司 | Single-H operated power takeoff control system capable of canceling traveling power take-off and use method of single-H operated power takeoff control system |
| CN203372107U (en) * | 2013-06-06 | 2014-01-01 | 东风汽车公司 | Double-H controlled power takeoff electronic control system capable of taking off power while running |
| CN207630969U (en) * | 2017-11-29 | 2018-07-20 | 东风商用车有限公司 | A kind of AMT power takeoff device control systems |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6569852B2 (en) * | 2015-06-25 | 2019-09-04 | ヤンマー株式会社 | Hydraulic device |
-
2021
- 2021-10-26 CN CN202111245669.3A patent/CN113915247B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2189223Y (en) * | 1993-12-08 | 1995-02-08 | 胜利石油管理局钻井工艺研究院 | Over-pressure protective device |
| JP2003025860A (en) * | 2001-07-13 | 2003-01-29 | Isuzu Motors Ltd | Automatic clutch control type vehicle with pto mechanism |
| CN2913770Y (en) * | 2005-09-27 | 2007-06-20 | 罗献尧 | Venting escape valve |
| CN102180094A (en) * | 2011-04-19 | 2011-09-14 | 北京理工华创电动车技术有限公司 | Method for controlling upper part of special vehicle |
| CN102755706A (en) * | 2012-07-27 | 2012-10-31 | 温州市公安消防支队 | One-key control system for power takeoff device |
| CN103129493A (en) * | 2013-03-12 | 2013-06-05 | 中国重汽集团济南动力有限公司 | Control method and control device used for power takeoff of AMT vehicle |
| CN103303226A (en) * | 2013-06-06 | 2013-09-18 | 东风汽车公司 | Single-H operated power takeoff control system capable of canceling traveling power take-off and use method of single-H operated power takeoff control system |
| CN203372107U (en) * | 2013-06-06 | 2014-01-01 | 东风汽车公司 | Double-H controlled power takeoff electronic control system capable of taking off power while running |
| CN207630969U (en) * | 2017-11-29 | 2018-07-20 | 东风商用车有限公司 | A kind of AMT power takeoff device control systems |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113915247A (en) | 2022-01-11 |
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