CN209987732U - Range extender, power output system and hybrid tractor - Google Patents
Range extender, power output system and hybrid tractor Download PDFInfo
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- CN209987732U CN209987732U CN201920261537.1U CN201920261537U CN209987732U CN 209987732 U CN209987732 U CN 209987732U CN 201920261537 U CN201920261537 U CN 201920261537U CN 209987732 U CN209987732 U CN 209987732U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The utility model provides a range extender, power take-off system and hybrid tractor, wherein the range extender cooperates in a hybrid tractor's a power take-off shaft, wherein the range extender includes an internal-combustion engine, a transfer case and a generator, wherein the generator passes through the transfer case is connected in the internal-combustion engine, power take-off shaft is suitable for to pass through the transfer case is connected in the internal-combustion engine, the power that the internal-combustion engine produced passes through the transfer case is divided into two and is transmitted respectively extremely the generator with power take-off shaft.
Description
Technical Field
The utility model relates to the agricultural machinery field especially involves range extender, power take off system and hybrid tractor.
Background
Tractors are one of the common agricultural machines used to tow and drive self-propelled power machines that perform various mobile tasks on a work machine. The tractor is typically provided with a PTO (power take-off) power take-off shaft that can be connected to other implements that perform traction or drive operations.
The power output shaft of the conventional internal combustion engine type tractor can be mounted to the output end of an internal combustion engine of the tractor to directly obtain power from the internal combustion engine, and smooth power is obtained by means of the characteristics of multiple gears and constant working speed of the internal combustion engine of the tractor.
With the heat of new energy application and the requirement for environmental protection, an electric tractor or a hybrid tractor is produced, and the power output shaft is generally used for an auxiliary drive motor or other stable power which is additionally arranged besides a main drive motor of the tractor, so as to be beneficial to the control of the external output power of the subsequent power output shaft.
For the whole tractor, an auxiliary motor is required to be specially added to the power output shaft in the double-motor scheme, so that the cost of the whole tractor is increased, and a corresponding power control system is more complex.
For example, a range-extended tractor is taken as an example, and the range-extended tractor is a practical transition type tractor between a traditional tractor and a pure electric tractor. The traditional tractor has higher operation oil consumption and emission requirements, and the electric tractor adopting a single energy system has the endurance which is difficult to meet the continuous operation requirements of the tractor with larger power, so the endurance of the electric tractor can be improved by adopting the internal combustion engine range extender. The range-extending hybrid towing engine has multiple working modes, and the tractor needs to control the walking state and the external output state, so that the whole control system is quite complex, and the manufacturing cost and the maintenance cost are correspondingly improved.
Further, the hybrid tractor can be formed by reforming a conventional tractor, and whether the conventional tractor can provide enough installation space or not is required.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an increase journey ware, power take off system and hybrid tractor, wherein hybrid tractor control is simple.
Another object of the present invention is to provide a range extender, a power output system and a hybrid tractor, wherein the driving system of the hybrid tractor has a simple structure.
Another object of the present invention is to provide a range extender, a power output system and a hybrid tractor, wherein the installation space required by a power output shaft of the hybrid tractor is smaller.
Another object of the present invention is to provide a range extender, a power output system and a hybrid tractor, wherein the driving system does not need to add an auxiliary motor or other stable power sources to connect with the power output shaft.
Another object of the present invention is to provide a range extender, a power output system and a hybrid tractor, wherein the power output of the hybrid tractor can reach dynamic balance with the walking output.
Another object of the present invention is to provide a range extender, a power output system and a hybrid tractor, wherein the hybrid tractor is capable of outputting different rotation speeds by the power output shaft.
Another object of the present invention is to provide a range extender, a power output system and a hybrid tractor, wherein the range extender can divide power into two and transmit to a generator and the power output shaft respectively, wherein the generator can supply power for a main driving motor.
Another object of the present invention is to provide a range extender, a power output system and a hybrid tractor, wherein the generator and the power output shaft are respectively supplied with energy through an internal combustion engine, and the power of the generator is controllable during operation.
Another object of the present invention is to provide a range extender, power take-off system and hybrid tractor, wherein the power take-off shaft can be monitored and used for adjusting the power take-off of the generator, thereby adjusting the power take-off of the main driving motor, and then realizing dynamic balance.
The utility model discloses a still another aim at increases journey ware, power take off system and hybrid tractor, based on the invariable speed formula energy supply of internal-combustion engine, the generator homoenergetic can adopt the mode of real-time torque regulation and control to realize wholly increase the seamless connection on the each part working method of journey ware.
According to an aspect of the utility model provides an increase journey ware cooperates in a hybrid tractor's a power output shaft, and it includes:
an internal combustion engine;
a transfer case; and
a generator, wherein said generator is connected to said internal combustion engine through said transfer case, said power take-off shaft is adapted to be connected to said internal combustion engine through said transfer case, and power generated by said internal combustion engine is transmitted in two through said transfer case to said generator and said power take-off shaft, respectively.
According to an embodiment of the invention, the power take-off shaft is connected with shifting in the transfer case.
According to an embodiment of the present invention, the range extender further comprises a first output shaft, wherein the internal combustion engine and the transfer case are driven by the first output shaft.
According to an embodiment of the present invention, the range extender further comprises a second output shaft, wherein the internal combustion engine and the power transmission shaft transmit through the second output shaft.
According to an embodiment of the present invention, the range extender further comprises a range extender controller, wherein the internal combustion engine, the transfer case and the generator are respectively controllably connected to the range extender controller.
According to the utility model discloses an on the other hand, the utility model provides a power take-off system, it includes:
a power take-off shaft; and
the range extender as described above, wherein the power take-off shaft is connected to the transfer case.
According to an embodiment of the present invention, the power take-off system further comprises a main drive motor and a power supply system, wherein the generator is electrically connectable to the power supply system, wherein the main drive motor is electrically connectable to the generator.
According to another aspect of the utility model, the utility model provides a hybrid tractor, it includes:
a vehicle body;
a travel system, wherein the travel system is mounted to the vehicle body;
a power take-off shaft;
a power supply system;
a control system; and
a drive system, wherein said drive system is mounted to said vehicle body, wherein said drive system comprises a main drive motor and a range extender according to above, wherein said main drive motor is electrically connectable to said power supply system, wherein said main drive motor is drivably connected to said generator, wherein said walking system, said power take-off shaft, said power supply system and said drive system are controllably connected to said control system, respectively.
According to an embodiment of the present invention, the control system includes a monitoring unit, a processing unit and a control unit, wherein the monitoring unit is communicably connected to the traveling system, the power output shaft, the power supply system and the driving system, the processing unit and the monitoring unit are in communication connection with each other, the processing unit and the control unit are in communication connection with each other.
According to an embodiment of the present invention, the hybrid tractor has a first working mode, a second working mode and a third working mode, the first working mode, the generator generates electricity and supplies to the main drive motor, only the main drive motor drives the traveling system, the second working mode, the range extender only serves as the power source of the power output shaft, the third working mode, the generator generates electricity and the range extender is right the power shaft output, by the control unit controls the range extender so that the tractor is switched from the first working mode, the second working mode and between the third working modes.
According to an embodiment of the present invention, the internal combustion engine and the generator are respectively controllably connected to the control unit, and when the load of the power take-off shaft changes, the control unit controls the generator to keep the internal combustion engine in a predetermined working area when the output of the power take-off shaft is satisfied.
According to an embodiment of the present invention, the internal combustion engine, the generator and the power supply system are controllably connected to the control unit, respectively, when the output of the traveling system changes, the control unit controls the power supply system so that the generator and the power supply system maintain the internal combustion engine at a preset working area while satisfying the output of the traveling system.
According to an embodiment of the present invention, the internal combustion engine, the generator and the power supply system are respectively controllably connected to the control unit, when the output demand of the traveling system changes and the load of the power take-off shaft changes, the control unit controls the generator and the power supply system to satisfy the traveling system output and the load of the power take-off shaft while keeping the internal combustion engine at a preset working area.
Drawings
Fig. 1 is a schematic diagram of an operation of a range extender according to a preferred embodiment of the present invention.
Fig. 2A is a schematic diagram of a hybrid tractor according to a preferred embodiment of the present invention.
Fig. 2B is a schematic diagram of a hybrid tractor according to a preferred embodiment of the present invention.
Fig. 2C is a schematic diagram of a hybrid tractor according to a preferred embodiment of the present invention.
Fig. 3A is a schematic view of a hybrid tractor according to a preferred embodiment of the present invention.
Fig. 3B is a schematic view of a hybrid tractor according to a preferred embodiment of the present invention.
Fig. 4 is an operational view of a hybrid tractor according to a preferred embodiment of the present invention.
Fig. 5 is a schematic diagram of a control system according to a preferred embodiment of the present invention.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purpose of limitation.
It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.
Referring to fig. 1 to 5, a hybrid tractor 1 according to a preferred embodiment of the present invention is illustrated.
The hybrid tractor 1 comprises a vehicle body 10, a traveling system 20, a power take-off 30, a driving system 40, a power supply system 50 and a control system 60, wherein the traveling system 20 is used for driving the vehicle body 10 to move forward or backward, the traveling system 20 is mounted on the vehicle body 10, the power take-off 30 is used for outputting to the outside, the power take-off 30 is mounted on the driving system 40, the driving system 40 is mounted on the vehicle body 10 and is used for driving the vehicle body 10 to travel or output to the outside, the power supply system 50 is used for storing electric energy and providing electric energy, the power supply system 50 is electrically connected to the driving system 40, and the control system 60 is used for controlling the driving system 40, the power supply system 50 and the traveling system 20, wherein the walking system 20, the driving system 40 and the power supply system 50 are respectively controllably connected to the control system 60.
The drive system 40 includes a main drive motor 41 and a range extender 42, wherein the traveling system 20 is drivably connected to the main drive motor 41, wherein the main drive motor 41 is electrically connectable to the power supply system 50, wherein the range extender 42 is electrically connectable to the power supply system 50, such that the range extender 42 is electrically connectable to the main drive motor 41 and the power take-off shaft 30 is drivably mounted to the range extender 42.
More specifically, the power take-off shaft 30 is mounted directly to the range extender 42. The range extender 42 includes an internal combustion engine 421, an electric generator 422, and a transfer case 423, wherein the electric generator 422 and the power take-off shaft 30 are respectively drivably connected to the internal combustion engine 421 through the transfer case 423, wherein the electric generator 422 converts kinetic energy transmitted from the internal combustion engine 421 into electric energy, which is then transmitted to the power supply system 50 to supply the main drive motor 41 in a subsequent process. The power take-off shaft 30 transmits power from the internal combustion engine 421 to the outside, so that other devices connected to the power take-off shaft 30 can be driven for work, such as towing work, lifting work, and the like.
The range extender 42 may also include a range extender controller 426, wherein the internal combustion engine 421 and the generator 422 are each controllably connected to the range extender controller 426. The transfer case 423 may also be controllably connected to the range extender controller 426. The range-extending controller 426 may control the output of the internal combustion engine 421 and the operating state of the generator 422 based on an operation command.
In this way, the power output shaft 30 does not need to be connected to an auxiliary motor or other smooth power source, and thus does not need to be additionally installed, compared with the existing extended range electric tractor.
Further, the conventional fuel-oil-type tractor may also be modified into an extended-range electric tractor, in which the power transmission shaft is mounted to the internal combustion engine 421 instead of the power output shaft 30 being connected to another auxiliary motor or other stationary power source, so that the installation space provided by the conventional fuel-oil-type tractor may be reduced.
In other words, the conventional fuel-oil type tractor can be converted into an extended range type electric tractor under the condition that the installation space which can be provided by the conventional fuel-oil type tractor is limited.
Further, the power supply system 50 includes at least one battery pack, an input connector and an output connector, wherein the input connector is connected to an input end of the battery pack, the output connector is connected to an output end of the battery pack, wherein the generator 422 is connected to the input connector to transfer electric power generated during operation to the battery pack, and wherein the main drive motor is connected to the output connector to obtain electric power from the battery pack to operate.
The traveling system 20, the power take-off shaft 30, the driving system 40, the power supply system 50 and the power take-off system 100 are respectively and controllably connected to the control system 60 so that the hybrid tractor 1 can travel or drive other devices to work according to instructions.
Referring to fig. 2A, 2B and 2C, the hybrid tractor 1 generally has three operation modes, which are distinguished by power sources, wherein the first operation mode is a pure electric mode, the second operation mode is a range-extending mode, and the third operation mode may be a range-extending mode.
Referring to fig. 2A, in the first operation mode, only the main driving motor 41 is operated to supply power to the traveling system 20. The range extender generates electricity 42 to be supplied to the main drive motor 41.
Referring to fig. 2B, in the second operation mode, the range extender 41 is not used for generating electricity and is used as a power source of the power output shaft 30. When the main drive motor 41 is not in use, the power supply system 50 is not powered or charged. When the main driving motor 41 is operated, the power supply system 50 supplies power to the main driving motor 41, but the range extender 41 does not supply power to the power supply system 50.
Referring to fig. 2C, in the third operating mode, not only the main driving motor 41 is in operation, but also the internal combustion engine 421 is in an operating state, and the operating internal combustion engine 421 can supply energy to the power supply system 50 to increase energy reserve, and can drive the power output shaft 30 to operate. The control system 60 controls the drive system 40 to switch between the first, second and third modes of operation.
The control system 60 includes a monitoring unit 61, a processing unit 62 and a control unit 63, wherein the monitoring unit 61 is disposed on the traveling system 20, the power output shaft 30, the driving system 40, the power supply system 50 and the power output system 100, and is configured to obtain a real-time operating status of the hybrid tractor 1 in real time. The processing unit 62 is communicably connected to the monitoring unit 61, wherein the processing unit 62 obtains a processing result based on the monitoring unit 61, and the control unit 63 performs control based on the processing result of the processing unit 62.
The monitoring unit 61 is configured to monitor one or more of the driving system 40, the traveling system 20, the power supply system 50, and the power output shaft 30.
The monitoring unit 61 collects information of the driving system 40, the traveling system 20, the power supply system 50, and the power take-off shaft 30, the processing unit 62 generates a processing result based on the information collected by the monitoring unit 61, and the control unit 63 controls the driving system 40, the traveling system 20, the power supply system 50, and the power take-off shaft 30 based on the processing result.
The power take-off shaft 30 is controllably connected to the control unit 63. In this example, the power take-off shaft 30 is shiftable connected to the transfer case 423 and the power take-off shaft 30 is shift controllably connected to the control unit 63.
During operation of the range extender 42, the internal combustion engine 421 of the range extender 42 is connected to the control unit 63 in a rotation speed controllable manner, and the internal combustion engine 421 can output a constant rotation speed. The power of the transmission output shaft comes from the internal combustion engine 421, when the internal combustion engine 421 is in a constant rotation speed output state, the transmission output shaft can also output at a constant rotation speed, and the power output shaft 30 is connected to the transfer case 423 in a shiftable manner, so that the rotation speed of the power output shaft 30 can be changed under the condition that the rotation speed of the internal combustion engine 421 is constant, and a scene that the power output shaft 30 is required to output different rotation speeds in practical application is met.
Further, the internal combustion engine 421 of the range extender 42 is controlled by using a rotation speed, and the generator 422 is controlled by using a torque. That is, the internal combustion engine 421 is controllably connected to the control unit 63 by the rotational speed, and the generator 422 is controllably connected to the control unit 63 by the torque. After the internal combustion engine 421 reaches a required rotation speed point according to an input signal, the control unit 63 controls the magnitude of the power generation torque of the generator 422 according to the magnitude of the required power generation amount for the generator 422, thereby realizing the control of the power of the generator 422.
Since the range extender 42 requires high efficiency, the internal combustion engine 421 of the range extender 42 can be set to have a constant rotation speed, and the control unit 63 can adjust the output power to meet the demand by adjusting the generating torque of the generator 422. For example, since the hybrid tractor 1 needs to advance at an accelerated speed, the power of the main driving motor 41 is insufficient, and at this time, the hybrid tractor 1 may be switched from the electric only mode to the range extending mode, so that the internal combustion engine 421 starts to operate, and thus the electric energy generated by the generator 422 is transmitted to the main driving motor 41 through the power supply system 50, and further, the power output by the hybrid tractor 1 to the outside can be increased.
The range extender 42 further includes a first output shaft 424 and a second output shaft 425, wherein the first output shaft 424 is located between the internal combustion engine 421 and the transfer case 423, the internal combustion engine 421 and the transfer case 423 transmit power through the first output shaft 424, wherein the second output shaft 425 is located between the transfer case 423 and the generator 422, and the transfer case 423 and the generator 422 transmit power through the second output shaft 425.
Further, the power take-off shaft 30 has a power input connected to the transfer case 423 and a power output connected to other equipment. The power take-off shaft 30 is shiftable connected to the transfer case 423 so that the power take-off shaft 30 can output at a plurality of gear speeds. The power take-off shaft 30 is controllably connected to the control unit 63.
For example, the power output shaft 30 can meet the multi-gear speed output according to the national standard requirement, namely the output speed needs to be controlled at A, B, C. It is worth mentioning that the internal combustion engine 421 of the range extender 42 can output a constant rotation speed, so that the control unit 63 can control the power output shaft 30 to shift to meet different rotation speed requirements under the condition that the rotation speed of the internal combustion engine 421 is not changed.
More specifically, the monitoring unit 61 may include a traveling system monitoring module 611, a driving system monitoring module 612, a power supply system monitoring module 613, and a power output shaft monitoring module 614, wherein the driving system monitoring module 612 may further include a main driving motor monitoring module 6121, an internal combustion engine monitoring module 6122, and a generator monitoring module 6123.
The main driving motor monitoring module 6121, the traveling system monitoring module 611, the power supply system monitoring module 613, the power output shaft monitoring module 614, the internal combustion engine monitoring module 6122 and the generator monitoring module 6123 are respectively communicably connected to the processing unit 62.
The main driving motor monitoring module 6121 is configured to monitor a status, for example, a real-time working status, of the main driving motor 41 of the driving system 40. The main driving motor monitoring module 6121 may be disposed at the main driving motor 41 or near the main driving motor 41, for example, the vehicle body 10 near the main driving motor 41.
The walking system monitoring module 611 is configured to monitor a state of the walking system 20 to obtain state information of the walking system 20, where the state information of the walking system 20 may include a power input information of the walking system 20 and a power output information of the walking system 20. The state information of the traveling system 20 includes load information of the traveling system 20, that is, information that the traveling system 20 needs to output.
The power supply system monitoring module 613 is configured to monitor the state of the power supply system 50 to obtain the state information of the power supply system 50. The status information of the power supply system 50 may include a power input information and a power output information of the power supply system 50. The state information of the power supply system 50 may include load information of the power supply system 50, that is, information that the power supply system 50 needs to output to the outside, for example, the power amount that needs to be provided when the traveling system 20 operates.
The pto shaft monitoring module 614 is configured to monitor the state of the pto shaft 30 to obtain state information of the pto shaft 30, where the state information of the pto shaft 30 may include a power input information and a power output information of the pto shaft 30. The state information of the power output shaft 30 may include load information of the power output shaft 30, that is, information that the power output shaft 30 needs to output to the outside, for example, kinetic energy that needs to be provided when the power output shaft 30 operates. The load of the power output shaft 30 is determined by the equipment connected to the power output shaft 30, and the power output shaft 30 can provide enough kinetic energy to the working object to drive the external equipment to work.
The internal combustion engine monitoring module 6122 is configured to monitor a state of the internal combustion engine 421 to obtain state information of the internal combustion engine 421, where the state information of the internal combustion engine 421 may include fuel information, rotational speed information, output power information, and the like of the internal combustion engine 421. The state information of the internal combustion engine 421 may include load information of the internal combustion engine 421, that is, information that the internal combustion engine 421 needs to output to the outside, for example, kinetic energy that the internal combustion engine 421 needs to provide to the power output shaft 30. The load of the internal combustion engine 421 is mainly determined by the generator 422 and the power take-off shaft 30. When the load of the power output shaft 30 increases, the internal combustion engine 421 needs to increase the output to be provided to the power output shaft 30 so that the power output shaft 30 satisfies the demand for the external output. When the load of the generator 30 increases, the internal combustion engine 421 needs to increase the output to be supplied to the generator 30.
The generator monitoring module 6123 is configured to monitor a working state of the generator 422, especially a real-time working state of the generator 422, so as to obtain status information of the generator 422. The state information of the generator 422 may include a rotation speed information, a torque information, an input power information, and an output power information of the generator 422. The state information of the generator 422 may include load information of the generator 422, that is, information that the generator 422 needs to output to the outside, for example, information output to the power supply system 50 or the power take-off shaft 30. The state of the generator 422 can be adjusted according to the needs of the power take-off shaft 30 and the running gear 20.
More specifically, when the output required for the traveling system 20 increases, for example, when the user presses the accelerator, the output of the generator 422 may also increase to increase the output to the traveling system 20, and the output of the power supply system 50 may also increase to increase the output to the traveling system 20. Of course, the output of the generator 422 or one of the power supply systems 50 to the traveling system 20 may be increased.
Furthermore, the internal combustion engine 421 has a better working area, and when the internal combustion engine 421 is in the better working area, the working efficiency of the internal combustion engine 421 is higher, and the internal energy of the fuel can be converted into mechanical energy with higher efficiency, so that the purpose of saving the oil is achieved. The generator 422 can cooperate with the engine 421 to enable the engine 421 to remain operational within the preferred operating region.
When the load of the power take-off shaft 30 increases, the output of the internal combustion engine 421 to the power take-off shaft 30 also needs to increase to meet the demand for the output of the power take-off shaft 30, and in order to keep the internal combustion engine 421 within the preferred operating region, the output of the internal combustion engine 421 to the generator 422 can be reduced so that the internal combustion engine 421 can still meet the demand for the load increase of the power take-off shaft 30 within the preferred operating region. If the output of the traveling system 20 is not changed at the time, the output demand of the traveling system 20 can be satisfied by decreasing the output of the generator 422 to the traveling system 20 and increasing the output of the power supply system 50 to the traveling system 20.
When the load of the power take-off shaft 30 is reduced, the output of the internal combustion engine 421 to the power take-off shaft 30 also needs to be reduced to satisfy the demand for the output of the power take-off shaft 30, and in order to keep the internal combustion engine 421 in the preferred operating region, the output of the internal combustion engine to the engine 422 can be increased so that the internal combustion engine 421 can still satisfy the demand for the reduction of the load of the power take-off shaft 30 in the preferred operating region. If the output of the traveling system 20 is not changed at the time, the output demand of the traveling system 20 can be satisfied by increasing the output of the generator 422 to the traveling system 20 and decreasing the output of the electric energy stored in the electric power supply 50 itself to the traveling system 20.
Further, when the required output of the traveling system 20 varies, the output requirement of the traveling system 20 can be satisfied by controlling the operating states of the power supply system 50 and the generator 422 while maintaining the internal combustion engine 421 in the preferred operating region. The preferred operating region may be set in advance, and the internal combustion engine may be maintained in the preferred operating region set in advance. It will be appreciated that the hybrid tractor 1 may include a plurality of detectors and/or sensors, and the hybrid tractor 1 may include at least one processor to which the detectors or sensors, respectively, are communicatively coupled. The processing unit 62 may be communicatively coupled to the processor, or the processing unit 62 may be integrated or partially integrated with the processor. The monitoring unit 61 may be communicatively connected to the detector and/or sensor. The monitoring unit 61 may also be integrated or partly integrated with the detector or the sensor.
The main driving motor monitoring module 6121, the traveling system monitoring module 611, the power supply system monitoring module 613, the power output shaft monitoring module 614, the internal combustion engine monitoring module 6122 and the generator monitoring module 6123 of the monitoring unit 61 may be respectively communicably connected to the detector and/or the sensor, or the main driving motor monitoring module 6121, the traveling system monitoring module 611, the power supply system monitoring module 613, the power output shaft monitoring module 614, the internal combustion engine monitoring module 6122 and the generator monitoring module 6123 may be integrated or partially integrated with the detector and/or the sensor. The main driving motor monitoring module 6121, the traveling system monitoring module 611, the power supply system monitoring module 613, the power output shaft monitoring module 614, the internal combustion engine monitoring module 6122 and the generator monitoring module 6123 of the monitoring unit 61 may be respectively integrated with a corresponding detector or sensor, or at least two of the main driving motor monitoring module 6121, the traveling system monitoring module 611, the power supply system monitoring module 613, the power output shaft monitoring module 614, the internal combustion engine monitoring module 6122 and the generator monitoring module 6123 may be integrated with the same detector and/or the same sensor.
It will be understood by those skilled in the art that the above-mentioned arrangement of the monitoring unit 61 is only for illustration and is not intended to limit the present invention.
The processing unit 62 generates a processing result based on information obtained by monitoring or detecting the main driving motor monitoring module 6121, the traveling system monitoring module 611, the power supply system monitoring module 613, the power output shaft monitoring module 614, the internal combustion engine monitoring module 6122 and the generator monitoring module 6123 of the monitoring unit 61, and the control unit 63 controls the traveling system 20, the power output shaft 30, the power supply system 50 and the driving system 40 based on the processing result of the processing unit 62.
For example, when the monitoring unit 61 detects that the output required by the traveling system 20 exceeds the load range of the power supply system 50, and the monitoring unit 61 detects that the range extender 42 is not in an operating state, the processing unit 62 generates a processing result based on the information detected by the monitoring unit 61, and the control unit 63 controls the range extender 42 to start operating to meet the output requirement of the traveling system 20 based on the processing result. For the walking system 20, after the processing unit 62 receives the information obtained from the walking system monitoring module 611 of the walking system 20, if the processing unit 62 analyzes and finds that the output power required by the walking system 20 is greater than the current real-time output power of the walking system 20, the processing unit 62 generates a processing result, and the control unit 63 controls the main driving motor 41 to increase the output of the walking system 20 based on the processing result.
For the generator 422, after the processing unit 62 receives the information acquired by the generator monitoring module 6123, if the processing unit 62 analyzes that the electric quantity currently required by the generator 422 is greater than the real-time electric quantity, the processing unit 62 generates a processing result, the control unit 63 adjusts the electric power generation torque of the generator 422 based on the processing result to meet the requirement, and the adjustment is stopped when the output power of the generator 422 reaches the required power.
For the internal combustion engine 421, after the processing unit 62 receives the information obtained from the internal combustion engine monitoring module 6122, if the processing unit 62 analyzes that the external output of the internal combustion engine 421 is lower than the required output at present, the processing unit 62 generates a processing result, and the control unit 63 adjusts the operating power or the rotation speed of the internal combustion engine 421 to meet the requirement of the external output based on the processing result.
For the power supply system 50, after the processing unit 62 receives the information obtained from the power supply system monitoring module 613, if the processing unit 62 analyzes and finds that the current external output power of the power supply system 50 is lower than the required output power, the processing unit 62 generates a processing result, and the control unit 63 adjusts the operating power of the power supply system 50 based on the processing result to meet the requirement of the external output power. Or, when the processing unit 62 analyzes and finds that the current external output power of the power supply system 50 is higher than the required output power, the processing unit 62 generates a processing result, and the control unit 63 adjusts the working power of the power supply system 50 based on the processing result to meet the requirement of the external output power.
It is understood that the internal combustion engine monitoring module 6122 may be communicatively connected to the generator monitoring module 6123 or the power output shaft monitoring module 614, respectively, to obtain information about the output demand of the internal combustion engine 421 based on the generator monitoring module 6123 and the power output shaft monitoring module 614.
The control unit 63 may control the output of the internal combustion engine 421 so that the power distribution of the internal combustion engine 421 to the generator 422 and the power take-off shaft 30 meets the demands of the generator 422 and the power take-off shaft 30, respectively.
The control unit 63 may implement control of the internal combustion engine 421 based on the required output of the generator 422 and the required output of the power take-off shaft 30, and further, the control unit 63 may adjust the generator 422 and the power take-off shaft 30 based on the required output of the generator 422 and the required output of the power take-off shaft 30 so that the generator 422 and the power take-off shaft 30 respectively meet the requirements, for example, the control unit 63 controls the torque of the generator 422, and the power take-off shaft 30 controls the rotation speed of the power take-off shaft 30.
It is worth mentioning that the control unit 63 may also control the main drive motor 41 and the range extender 42 to work in cooperation. In other words, the control unit 63 may also control the traveling system 20 and the power take-off shaft 30 separately so that the two reach dynamic balance.
In particular, when the hybrid tractor 1 is in the second operating mode. The processing unit 62 receives the information from the traveling system monitoring module 611, the information from the power supply system monitoring module 613, and the information from the internal combustion engine monitoring module 6122, and analyzes that the power supply system 50 cannot meet the output requirement of the traveling system 20 at present, and the internal combustion engine 421 is in a stop state, so that the processing unit 62 generates a processing result, based on the processing result, the control unit 63 controls the internal combustion engine 421 to start to operate and operate according to a certain output to meet the requirement of the traveling system 20, and at this time, the hybrid tractor 1 is switched from the second operation mode to the third operation mode.
Further, based on the generator monitoring module 6123 and the pto shaft monitoring module 614, the processing unit 62 obtains the required torque of the generator 422 and the required torque of the pto shaft 30 through the monitoring unit 61 and generates a processing result, and the control unit 63 adjusts the internal combustion engine 421 based on the processing result to make the generator 422 and the pto shaft 30 reach the corresponding required torques. Based on the data obtained by the generator monitoring module 6123 and the main driving motor monitoring module 6121, the processing unit 62 generates a processing result, and the control unit 63 controls the output power of the main driving motor 41 according to the processing result, so that the traveling system 20 and the power output shaft 30 reach dynamic balance.
More specifically, based on the information respectively obtained by the traveling system monitoring module 611, the internal combustion engine monitoring module 6122 and the power output shaft monitoring module 614, the processing unit 62 generates a processing result, and the control unit 63 can adjust the power output of the generator 422 based on the processing result to make the traveling system 20 and the power output shaft 30 reach dynamic balance, while the working efficiency of the internal combustion engine 421 is controlled within a certain range.
For example, the load of the power take-off shaft 30 is increased, the control unit 63 controls the output of the internal combustion engine 421 to be increased based on the load increase of the power take-off shaft 30 to increase the output torque to the power take-off shaft 30, the rotation speed of the power take-off shaft 30 is kept constant, while the output of the generator 422 is derived from a part of the input of the internal combustion engine 421 for the generator 422, while the generator 422 needs to be output toward the traveling system 20, and the operating state of the generator 422 is affected by the internal combustion engine 421, the power take-off shaft 30, and the traveling system 20. The processing unit 62 can generate a processing result based on the state information and the demand information about the internal combustion engine 421, the power take-off 30 and the traveling system 20 acquired by the monitoring unit 61, and the control unit 63 adjusts the torque of the generator 422 based on the processing result, so that the generator 422 can meet the output demand of the traveling system 20 on the one hand, and the output of the internal combustion engine 421 does not exceed the upper limit or the lower limit of the optimal operating efficiency on the other hand, thereby achieving the dynamic balance between the traveling system 20 and the power take-off 30. It is worth mentioning that, for the conventional tractor, the larger the external load of the power output shaft 30, the smaller the power output that the running gear 20 can obtain from the internal combustion engine 421. With the power output system 100 provided in this example, the output of the traveling system 20 may not be reduced, even increased as required, as the external load of the power output shaft 30 is larger.
Further, as for the internal combustion engine 421, the output thereof is determined by the generator 422 and the power take-off shaft 30, the processing unit 62 is configured to adjust the power output of the generator 422 based on the required torques of the generator 422 and the power take-off shaft 30 acquired by the monitoring unit 61, and then after the generator 422 determines the required output thereof based on the operating range of the internal combustion engine 421, the required output of the power take-off shaft 30 and the required output of the traveling system 20, the internal combustion engine 421 can maintain its own operating power at the maximum output power stage and can satisfy the output requirement of the power take-off shaft 30 by adjusting the output power of the generator 422.
Specifically, the output torque request of the generator 422 to the internal combustion engine 421 can be adjusted so that the internal combustion engine 421 can satisfy the output demand for the power output shaft 30 while achieving the maximum output power.
For example, when the load of the power take-off shaft 30 changes, the power of the internal combustion engine 421 between the power take-off shaft 30 and the generator 422 can be redistributed to meet the load of the power take-off shaft 30 while maintaining the internal combustion engine 421 in the preferred operating region. In the case where the output of the internal combustion engine 421 to the generator 422 is changed, the power supply system 50 and the generator 422 cooperate to meet the output demand of the traveling system 20 in such a manner that a state of dynamic balance is achieved between the traveling system 20 and the power take-off shaft 30.
The hybrid tractor 1 further includes a power take-off system 100, wherein the power take-off system 100 includes the power take-off shaft 30 and the range extender 42, wherein the power take-off shaft 30 is drivably connected to the range extender 42.
The power take-off system 100 further comprises the main drive motor 41 and the power supply system 50, wherein the main drive motor 41 is electrically connectable to the power supply system 50, wherein the generator 422 of the range extender 42 is capable of supplying power to the power supply system 50.
The power take-off system 100 further includes a power take-off control unit, wherein the power take-off control unit includes a power take-off monitor communicably coupled to the power take-off processor, a power take-off processor communicably coupled to the power take-off controller, and a power take-off controller.
The pto monitor may be used to monitor the pto shaft 30 and/or the range extender 42, and the pto shaft monitor may also be used to monitor the main drive motor 41 and the power supply system 50.
A method of operating the power take-off system 100 includes the steps of:
acquiring the output demand of the power output shaft 30 by the power output monitor; and
the generator 422 and the internal combustion engine 421 are controlled based on the output demand of the power take-off shaft 30 so that the internal combustion engine 421 is maintained in a predetermined operating region while the output demand of the power take-off shaft 30 is satisfied.
According to another aspect of the present invention, the present invention provides a working method of the hybrid tractor 1, wherein the working method comprises the following steps:
acquiring an output demand of the power take-off shaft 30 of the hybrid tractor 1; and
the internal combustion engine 421 is controlled while maintaining the internal combustion engine 421 in a preset operation region in a manner of controlling the generator 422 based on the required output of the power take-off shaft 30.
According to some embodiments of the invention, wherein in the above method, the working method further comprises the steps of:
acquiring an output requirement of a walking system 20; and
the internal combustion engine 421 is controlled while maintaining the internal combustion engine 421 in the preset operation region in such a manner that the generator 422 is adjusted based on the output demand of the power take-off shaft 30 and the output demand of the traveling system 20.
According to another aspect of the present invention, the present invention provides a control method of the power output system 100, which is applied to a hybrid tractor 1, comprising the following steps:
monitoring the power output system 100 while passing through a main drive motor 41 of the power output system 100, wherein the power of the internal combustion engine 421 is distributed to a generator 422 and a power output shaft 30 of the power output system 100, respectively, wherein the energy (electric energy) of the main drive motor 41 is derived from the generator 422; and
in response to the load detection of the power output shaft 30, the internal combustion engine 421 is in the maximum output power stage, and the electric power generation torque of the electric generator 422 is controlled to adjust the magnitude of the electric power generation amount, thereby adjusting the walking load of the main driving motor 41, so as to realize the maximum output power operation of the hybrid tractor 1, wherein the walking system 20 is drivably connected to the main driving motor 41.
According to some embodiments of the present invention, in the above method, the output demand of the power take-off shaft 30 is met by adjusting the output torque request of the generator 422 to the internal combustion engine 421.
According to some embodiments of the present invention, in the above method, the load of the traveling system 20 is mediated by adjusting the output of the internal combustion engine 421 to the generator 422 and adjusting the output of a power supply system 50, in response to the load of the traveling system 20, wherein the power supply system 20 is electrically connected to the main driving motor 41.
According to some embodiments of the present invention, in the above method, the output demand is satisfied by adjusting the output torque request of the generator 422 to the internal combustion engine 421 and the internal combustion engine 421 is maintained to operate in a predetermined operation region.
It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.
Claims (13)
1. A range extender adapted for engagement with a power take-off shaft of a hybrid tractor, comprising:
an internal combustion engine;
a transfer case; and
a generator, wherein said generator is connected to said internal combustion engine through said transfer case, said power take-off shaft is adapted to be connected to said internal combustion engine through said transfer case, and power generated by said internal combustion engine is transmitted in two through said transfer case to said generator and said power take-off shaft, respectively.
2. The range extender of claim 1, wherein the power output shaft is shiftably connected to the transfer case.
3. The range extender of claim 2, further comprising a first output shaft, wherein said internal combustion engine and said transfer case are driven through said first output shaft.
4. The range extender of claim 2, further comprising a second output shaft, wherein the internal combustion engine and the power transmission shaft are driven through the second output shaft.
5. The range extender of any one of claims 1 to 4, further comprising a range extender controller, wherein said internal combustion engine, said transfer case and said generator are each controllably connected to said range extender controller.
6. A power take-off system, comprising:
a power take-off shaft; and
the range extender of any one of claims 1 to 5 wherein said power output shaft is connected to said transfer case.
7. A power take-off system as defined in claim 6, further comprising a main drive motor and a power supply system, wherein the generator is electrically connectable to the power supply system, and wherein the main drive motor is electrically connectable to the generator.
8. A hybrid tractor, comprising:
a vehicle body;
a travel system, wherein the travel system is mounted to the vehicle body;
a power take-off shaft;
a power supply system;
a control system; and
a drive system, wherein said drive system is mounted to said vehicle body, wherein said drive system comprises a main drive motor and a range extender according to any one of claims 1 to 5, wherein said main drive motor is electrically connectable to said power supply system, wherein said main drive motor is drivably connected to said generator, wherein said travel system, said power take-off shaft, said power supply system, and said drive system are each controllably connected to said control system.
9. The hybrid tractor as defined by claim 8 wherein the control system includes a monitoring unit, a processing unit and a control unit, wherein the monitoring unit is communicably connected to the travel system, the power take-off shaft, the power supply system and the drive system, the processing unit and the monitoring unit are communicatively connected to each other, and the processing unit and the control unit are communicatively connected to each other.
10. The hybrid tractor according to claim 9, wherein the hybrid tractor has a first operation mode in which the generator generates electricity for use with the main drive motor and only the main drive motor drives the traveling system, a second operation mode in which the range extender is used only as a power source for the power output shaft, and a third operation mode in which the generator generates electricity and the range extender outputs to the power output shaft, the range extender being controlled by the control unit to switch the tractor from among the first operation mode, the second operation mode, and the third operation mode.
11. The hybrid tractor according to claim 10, wherein the internal combustion engine and the generator are respectively controllably connected to the control unit, and the control unit controls the generator to keep the internal combustion engine in a preset operating region while satisfying the power output shaft output when the load of the power output shaft is changed.
12. The hybrid tractor according to claim 10, wherein the internal combustion engine, the generator, and the power supply system are respectively controllably connected to the control unit, and the control unit controls the power supply system to cause the generator and the power supply system to maintain the internal combustion engine in a preset operation region while satisfying the output of the traveling system when the output of the traveling system is changed.
13. The hybrid tractor according to claim 10, wherein the internal combustion engine, the generator, and the power supply system are respectively controllably connected to the control unit, the control unit controlling the generator and the power supply system to maintain the internal combustion engine in a preset working range while satisfying the traveling system output and the power take-off shaft load when the output demand of the traveling system changes and the load of the power take-off shaft changes.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920261537.1U CN209987732U (en) | 2019-03-01 | 2019-03-01 | Range extender, power output system and hybrid tractor |
| PCT/CN2019/107539 WO2020177303A1 (en) | 2019-03-01 | 2019-09-24 | Range extender, hybrid power tractor and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920261537.1U CN209987732U (en) | 2019-03-01 | 2019-03-01 | Range extender, power output system and hybrid tractor |
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| CN209987732U true CN209987732U (en) | 2020-01-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109823159A (en) * | 2019-03-01 | 2019-05-31 | 丰疆智慧农业股份有限公司 | Distance increasing unit and mixed-power tractor and its application |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109823159A (en) * | 2019-03-01 | 2019-05-31 | 丰疆智慧农业股份有限公司 | Distance increasing unit and mixed-power tractor and its application |
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