WO2020177303A1

WO2020177303A1 - Range extender, hybrid power tractor and application thereof

Info

Publication number: WO2020177303A1
Application number: PCT/CN2019/107539
Authority: WO
Inventors: 李�杰; 王锐; 雷仕泽; 史慧星; 杜小义
Original assignee: 丰疆智能科技股份有限公司
Priority date: 2019-03-01
Filing date: 2019-09-24
Publication date: 2020-09-10

Abstract

Provided are a range extender (42), a hybrid power tractor (1) and the application thereof. The range extender (42) is fitted with a power output shaft (30) of the hybrid power tractor (1). The range extender (42) comprises an internal combustion engine (421), a transfer case (423), and an electric generator (422), wherein the electric generator (422) is connected to the internal combustion engine (421) by means of the transfer case (423), the power output shaft (30) is adapted to be connected to the internal combustion engine (421) by means of the transfer case (423), and power generated by the internal combustion engine (421) is divided into two parts by means of the transfer case (423) and transmitted to the electric generator (422) and the power output shaft (30), respectively.

Description

Range extender and hybrid tractor and their applications

Technical field

The invention relates to the field of agricultural machinery, in particular to range extenders and hybrid tractors and their applications.

Background technique

Tractor is one of the common agricultural machinery. It is a self-propelled power machine that is used to pull and drive the working machinery to complete various mobile operations. The tractor is usually equipped with a PTO (power take-off) power output shaft, which can be connected to other equipment to complete traction or drive operations.

The power output shaft of the traditional internal combustion engine type tractor can be installed on the output end of an internal combustion engine of the tractor to obtain power directly from the internal combustion engine, relying on the tractor’s internal combustion engine to have multiple gears and work The characteristic of constant speed obtains stable power.

With the upsurge of new energy applications and the demand for environmental protection, electric tractors or hybrid tractors have emerged. The power output shaft is generally used in addition to a main drive motor of the tractor and an auxiliary drive motor. Or other stable power to facilitate the controllable external output power of the power output shaft.

For the entire tractor, the dual-motor solution requires an auxiliary motor to be added to the power output shaft. On the one hand, it increases the cost of the entire vehicle and also makes the corresponding power control system more complicated.

Take the extended-range tractor as an example. The extended-range tractor is a practical transitional tractor between a traditional tractor and a pure electric tractor. Traditional tractors require high fuel consumption and emissions. However, electric tractors with a single energy system cannot meet the continuous operating needs of larger power tractors. Therefore, internal combustion engine range extenders can be used to improve the endurance of electric tractors. There are multiple working modes in the extended-range hybrid tractor. At the same time, the tractor needs to control the running state and external output state. At this time, the entire control system will be very complicated, and the production cost and maintenance cost will increase accordingly.

Furthermore, hybrid tractors can be transformed from traditional tractors. At this time, there is a certain demand for whether traditional tractors can provide sufficient installation space.

Summary of the invention

An object of the present invention is to provide a range extender and hybrid tractor and their applications, wherein the hybrid tractor is simple to control.

Another object of the present invention is to provide a range extender and a hybrid tractor and their applications, wherein the drive system of the hybrid tractor has a simple structure.

Another object of the present invention is to provide a range extender and a hybrid tractor and their applications, wherein a power output shaft of the hybrid tractor requires less installation space.

Another object of the present invention is to provide a range extender and hybrid tractor and their applications, wherein the drive system does not need to add an auxiliary motor or other stable power source for connecting to the power output shaft.

Another object of the present invention is to provide a range extender, a hybrid tractor and applications thereof, wherein the power output of the hybrid tractor can be dynamically balanced with the walking output.

Another object of the present invention is to provide a range extender and a hybrid tractor and their applications, wherein the power output shaft of the hybrid tractor can output different speeds.

Another object of the present invention is to provide a range extender and a hybrid tractor and their applications, wherein the range extender can divide the power into two and transmit power to a generator and the power output shaft respectively, wherein the power generation The machine can power a main drive motor.

Another object of the present invention is to provide a range extender and hybrid tractor and their applications, wherein the generator and the power output shaft are respectively powered by 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 and hybrid tractor and their applications, wherein the power output shaft can be monitored and used to adjust the power output of the generator, thereby adjusting the main drive motor Power output, and then achieve dynamic balance.

Another object of the present invention is a range extender and a hybrid tractor and their applications. Based on the constant-speed power supply of the internal combustion engine, the generators can adopt real-time torque regulation, thereby realizing the entire increase. The seamless connection of the various parts of the processor.

According to one aspect of the present invention, the present invention provides a range extender, which is matched with a power output shaft of a hybrid tractor, and includes:

An internal combustion engine;

A transfer case; and

A generator, wherein the generator is connected to the internal combustion engine through the transfer case, the power output shaft is adapted to be connected to the internal combustion engine through the transfer case, and the power generated by the internal combustion engine passes through all The transfer case is divided into two and is respectively transmitted to the generator and the power output shaft.

According to an embodiment of the present invention, the power output shaft is shiftably connected to the transfer case.

According to an embodiment of the present invention, the range extender further includes a first output shaft, wherein the internal combustion engine and the transfer case are transmitted through the first output shaft.

According to an embodiment of the present invention, the range extender further includes a second output shaft, wherein the internal combustion engine and the power transmission shaft are transmitted through the second output shaft.

According to an embodiment of the present invention, the range extender further includes 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 another aspect of the present invention, the present invention provides a power output system, which includes:

A power output shaft; and

According to the above-mentioned range extender, wherein the power output shaft is connected to the engine.

According to an embodiment of the present invention, the power output system further includes a main drive motor and a power supply system, wherein the generator is electrically connected to the power supply system, wherein the main drive motor is powered by the power supply system. Connected to the generator.

According to another aspect of the present invention, the present invention provides a hybrid tractor, which includes:

A car body

A walking system, wherein the walking system is installed on the vehicle body;

A power output shaft;

A power supply system;

A control system; and

A drive system, wherein the drive system is installed on the vehicle body, wherein the drive system includes a main drive motor and the extender according to the above, wherein the main drive motor is electrically connected to the power supply System, wherein the main drive motor is drivably connected to the generator, wherein the walking system, the power output shaft, the power supply system and the drive system are controllably connected to the control system, respectively system.

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 walking system, the power output shaft, and the power supply The system and the driving 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.

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. In the first working mode, the generator generates electricity to supply the main drive The motor is used, and only the main drive motor drives the walking system. In the second working mode, the range extender is only used as the power source of the power output shaft. In the third working mode, the The generator generates electricity and the range extender outputs to the power shaft. The control unit controls the range extender to make the tractor switch from the first working mode, the second working mode, and Switch between the third working mode.

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 output shaft changes, the control unit controls the generator to make The internal combustion engine maintains a preset working area when satisfying the output of the power output shaft.

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, and when the output of the walking system changes, the control unit controls the The power supply system enables the generator and the power supply system to maintain the internal combustion engine in a preset working area while satisfying the output of the walking 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 walking system changes and the load of the power output shaft During the change, the control unit controls the generator and the power supply system to maintain the internal combustion engine in a preset working area while satisfying the output of the walking system and the load of the power output shaft.

According to another aspect of the present invention, the present invention provides a power output system control method applied to a hybrid tractor, which includes the following steps:

When power is provided by a main drive motor of a power output system, the power output system is monitored, wherein the power of an internal combustion engine of the power output system is respectively distributed to a generator and a power output of the power output system Shaft, wherein the electrical energy of the main drive motor is derived from the generator; and

In response to the load detection of the power output shaft, the internal combustion engine is in the maximum output power stage, the power generation torque of the generator is controlled to adjust the power generation of the generator, wherein the walking system is drivably driven Connected to the main drive motor.

According to an embodiment of the present invention, in the above method, the output demand of the power output shaft is satisfied by adjusting the output torque request of the generator for the internal combustion engine.

According to an embodiment of the present invention, in the above method, in response to the load of the traveling system, the load of the traveling system is adjusted by adjusting the output of the internal combustion engine to the generator and adjusting the output of a power supply system, Wherein the power supply system is connected to the main drive motor in a power-supply manner.

According to an embodiment of the present invention, in the above method, the output torque request of the generator for the internal combustion engine is adjusted to meet the output demand and the internal combustion engine is maintained to work in a preset operating region.

Description of the drawings

Fig. 1 is a working schematic diagram of a range extender according to a preferred embodiment of the present invention.

Fig. 2A is a schematic diagram of the application of a hybrid tractor according to a preferred embodiment of the present invention.

Fig. 2B is a schematic diagram of the application of a hybrid tractor according to a preferred embodiment of the present invention.

Fig. 2C is a schematic diagram of the application of a hybrid tractor according to a preferred embodiment of the present invention.

Fig. 3A is a schematic diagram of a hybrid tractor according to a preferred embodiment of the present invention.

Fig. 3B is a schematic diagram of a hybrid tractor according to a preferred embodiment of the present invention.

Fig. 4 is a working schematic diagram 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 used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention And to simplify the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so the above terms should not be understood as limiting the present invention.

It can be understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in other embodiments, The number can be multiple, and the term "one" cannot be understood as a restriction on the number.

1 to 5, a hybrid tractor 1 according to a preferred embodiment of the present invention is illustrated.

The hybrid tractor 1 includes a vehicle body 10, a traveling system 20, a power output shaft 30, a driving system 40, a power supply system 50, and a control system 60, wherein the traveling system 20 is used to drive the vehicle The body 10 moves forward or backward, the walking system 20 is installed on the vehicle body 10, wherein the power output shaft 30 is used for external output, and the power output shaft 30 is installed on the drive system 40, wherein the drive system 40 is installed on the vehicle body 10 for driving the vehicle body 10 to walk or for external output, wherein the power supply system 50 is used for storing electrical energy and providing electrical energy, wherein the power supply system 50 is electrically connected to the driving system 40, wherein the control system 60 is used to control the driving system 40, the power supply system 50, and the walking system 20, wherein the walking system 20, the driving system The system 40 and the power supply system 50 are respectively controllably connected to the control system 60.

The driving system 40 includes a main driving motor 41 and a range extender 42, wherein the walking system 20 is drivably connected to the main driving motor 41, wherein the main driving motor 41 is power-supply connected to The power supply system 50, wherein the range extender 42 is energizedly connected to the power supply system 50, so that the range extender 42 is availably connected to the main drive motor 41, and the power output The shaft 30 is drivably mounted on the range extender 42.

More specifically, the power output shaft 30 is directly mounted on the range extender 42. The range extender 42 includes an internal combustion engine 421, a generator 422, and a transfer case 423, wherein the generator 422 and the power output shaft 30 are respectively drivably connected to the transfer case 423. The internal combustion engine 421, wherein the generator 422 converts the kinetic energy transferred from the internal combustion engine 421 into electrical energy, and then transfers the electrical energy to the power supply system 50 to power the main drive motor 41 in the subsequent process. The power output shaft 30 transmits the power from the internal combustion engine 421 outwards so that other equipment connected to the power output shaft 30 can be driven for operations, such as traction operations, lifting operations, 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 controllably connected to the range extender controller 426, respectively. The transfer case 423 may also be controllably connected to the range extension controller 426. The range extending controller 426 can control the output of the internal combustion engine 421 and the working state of the generator 422 based on an operating command.

In this way, compared to the existing range-extending electric tractor, the power output shaft 30 does not need to be connected to an auxiliary motor or other stable power source, so there is no need to install the auxiliary motor. Or other stable power source.

Further, a traditional fuel-fueled tractor can also be transformed into an extended-range electric tractor. In this process, the power transmission shaft is installed in the internal combustion engine 421 instead of connecting the power output shaft 30 to another auxiliary On the electric motor or other stable power source, the installation space provided by the traditional oil-fired tractor can be reduced.

In other words, under the condition that the installation space provided by the traditional fuel-fueled tractor is limited, it can also be converted into an extended-range electric tractor.

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, and the output connector is connected to The output end of the battery pack, wherein the generator 422 is connected to the input connector to transfer the power generated during operation to the battery pack, and the main drive motor is connected to the output connector To get power from the battery pack for work.

The walking system 20, the power output shaft 30, the drive system 40, the power supply system 50, and the power output system 100 are controllably connected to the control system 60, respectively, so that the hybrid The tractor 1 can walk or drive other devices to work according to instructions.

With particular reference to Figure 2A, Figure 2B and Figure 2C, for the hybrid tractor 1, there are generally three working modes, which are distinguished by power source. The first working mode is pure electric mode, and the second working mode The mode is extended range mode, and the third working mode can also be extended range mode.

Referring to FIG. 2A, in the first working mode, only the main driving motor 41 works to provide energy for the walking system 20. The range extender generates electricity 42 to supply the main drive motor 41.

Referring to FIG. 2B, in the second working mode, the range extender 41 is not used for power generation, but is used as the power source of the power output shaft 30. When the main driving motor 41 is not in use, the power supply system 50 is not powered or charged. When the main driving motor 41 is working, 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.

2C, in the third working mode, not only the main drive motor 41 is working, but the internal combustion engine 421 is also working. On the one hand, the internal combustion engine 421 in operation can supply the power supply system 50. In order to increase energy reserves, on the other hand, it can drive the power output shaft 30 to work. The control system 60 controls the driving system 40 to switch between the first working mode, the second working mode, and the third working mode.

The control system 60 includes a monitoring unit 61, a processing unit 62, and a control unit 63, wherein the monitoring unit 61 is arranged in the walking system 20, the power output shaft 30, the drive system 40, and The power supply system 50 and the power output system 100 are used to obtain the real-time working 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 is based on the processing result of the processing unit 62 Take control.

The monitoring unit 61 is used to monitor one or more of the driving system 40, the walking 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 walking system 20, the power supply system 50, and the power output shaft 30, and the processing unit 62 generates a report based on the information collected by the monitoring unit 61 As a result of the processing, the control unit 63 controls the driving system 40, the traveling system 20, the power supply system 50, and the power output shaft 30 based on the processing result.

The power output shaft 30 is controllably connected to the control unit 63. In this example, the power output shaft 30 is shiftably connected to the transfer case 423, and the power output shaft 30 is shiftable and controllably connected to the control unit 63.

When the range extender 42 is in operation, the internal combustion engine 421 of the range extender 42 is connected to the control unit 63 in a rotational speed controllable manner, and the internal combustion engine 421 can output at a constant 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 speed output state, the transmission output shaft can also output at a constant speed, and the power output shaft 30 is shiftably connected In the transfer case 423, the rotation speed of the power output shaft 30 can be changed when the rotation speed of the internal combustion engine 421 is constant, so as to meet the scenarios in which the power output shaft 30 needs to output different rotation speeds in practical applications.

Further, the internal combustion engine 421 of the range extender 42 adopts speed control, and the generator 422 adopts torque control. That is, the internal combustion engine 421 is connected to the control unit 63 in a rotational speed controllable manner, and the generator 422 is connected to the control unit 63 in a torque-controllable manner. After the internal combustion engine 421 reaches the required speed point according to an input signal, the control unit 63 controls the power generation torque of the generator 422 according to the required power generation of the generator 422, so as to realize the power generation Machine 422 power control.

Since the range extender 42 requires higher benefits, the internal combustion engine 421 of the range extender 42 can be set to a constant speed, and the control unit 63 can adjust the generating torque of the generator 422. Meet the adjustment of output power to meet demand. For example, because the hybrid tractor 1 needs to accelerate forward, the power of the main drive motor 41 is insufficient. At this time, the hybrid tractor 1 can be switched from the pure electric mode to the extended range mode, so that the internal combustion engine 421 starts In this way, the electric energy generated by the generator 422 is transmitted to the main driving motor 41 through the power supply system 50, so that the external output power of the hybrid tractor 1 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 performs power transmission 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 The generator 422 performs power transmission through the second output shaft 425.

Further, the power output shaft 30 has a power input end and a power output end, wherein the power input end is connected to the transfer case 423, and the power output end is connected to other equipment. The power output shaft 30 is connected to the transfer case 423 in a shiftable manner, so that the power output shaft 30 can output rotational speed in multiple gears. The power output shaft 30 is controllably connected to the control unit 63.

For example, the power output shaft 30 can meet the requirements of the national standard to meet the multi-gear speed output, that is, the output speed needs to be controlled at A, B, C... and a constant output torque. It is worth mentioning that the internal combustion engine 421 of the range extender 42 can output at a constant speed. Therefore, the control unit 63 can control the power output shaft 30 to shift gears when the speed of the internal combustion engine 421 remains unchanged. To meet different speed requirements.

More specifically, the monitoring unit 61 may include a walking 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 also It includes a main drive motor monitoring module 6121, an internal combustion engine monitoring module 6122, and a generator monitoring module 6123.

The main drive motor monitoring module 6121, the walking 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 separately The processing unit 62 is communicably connected.

The main driving motor monitoring module 6121 is used to monitor the status of the main driving motor 41 of the driving system 40, for example, real-time working status. The main driving motor monitoring module 6121 may be arranged 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 used to monitor the state of the walking system 20 to obtain state information of the walking system 20. The state information of the walking system 20 may include a power input information of the walking system 20 and The power output information of the walking system 20 is described. The state information of the walking system 20 includes load information of the walking system 20, that is, the information that the walking system 20 needs to output.

The power supply system monitoring module 613 is used to monitor the state of the power supply system 50 to obtain state information of the power supply system 50. The status information of the power supply system 50 may include power input information and power output information of the power supply system 50. The status 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 externally, such as the amount of power that the walking system 20 needs to provide when it is working.

The power output shaft monitoring module 614 is used to monitor the state of the power output shaft 30 to obtain the state information of the power output shaft 30. The state information of the power output shaft 30 may include a part of the power output shaft 30. Power input information and a power output information. The state information of the power output shaft 30 may include load information of the power output shaft 30, that is, the information that the power output shaft 30 needs to output externally, for example, the kinetic energy that the power output shaft 30 needs to provide during operation. 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 used to monitor the state of the internal combustion engine 421 to obtain state information of the internal combustion engine 421. The state information of the internal combustion engine 421 may include a fuel information, a rotation speed information, and an output power of the internal combustion engine 421. Information etc. 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 externally, for example, the 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 output shaft 30. When the load of the power output shaft 30 increases, the internal combustion engine 421 needs to increase the output provided to the power output shaft 30 so that the power output shaft 30 meets the demand for external output. When the load of the generator 30 increases, the internal combustion engine 421 needs to increase the output provided to the generator 30.

The generator monitoring module 6123 is used to monitor the working status of the generator 422, especially the real-time working status of the generator 422, to obtain status information of the generator 422. The status information of the generator 422 may include rotation speed information, torque information, input power information, and output power information of the generator 422. The status information of the generator 422 may include load information of the generator 422, that is, information that the generator 422 needs to output externally, for example, the information output to the power supply system 50 or the power output shaft 30 . The state of the generator 422 can be adjusted according to the needs of the power output shaft 30 and the traveling system 20.

More specifically, when the output required by the walking system 20 increases, for example, the user steps on the accelerator, the output of the generator 422 can also be increased to increase the output to the walking system 20. The output of the power supply system 50 can also be increased 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 walking system 20 may also be increased.

Furthermore, the internal combustion engine 421 has a better working area. When the internal combustion engine 421 is in the better working area, the working efficiency of the internal combustion engine 421 is relatively high, and the internal energy of the fuel can be reduced with a relatively high efficiency. Converted into mechanical energy, so as to achieve the purpose of fuel saving. The generator 422 can cooperate with the internal combustion engine 421 so that the internal combustion engine 421 can keep working in the preferred working area.

When the load of the power output shaft 30 increases, the output of the internal combustion engine 421 to the power output shaft 30 also needs to increase to meet the external output demand of the power output shaft 30. In order to keep the internal combustion engine 421 at all In the preferred working 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 load on the power output shaft 30 in the preferred working region. Increased demand. If the output of the walking system 20 does not change at that time, the output of the generator 422 to the walking system 20 can be reduced, and the output of the power supply system 50 to the walking system 20 can be increased. The output requirements of the traveling system 20.

When the load of the power output shaft 30 decreases, the output of the internal combustion engine 421 to the power output shaft 30 also needs to be reduced to meet the external output demand of the power output shaft 30, in order to keep the internal combustion engine 421 at In the preferred working 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 load reduction of the power output shaft 30 in the preferred working region. Small demand. If the output of the walking system 20 does not change at that time, the output of the generator 422 to the walking system 20 can be increased, and the electric energy stored in the power supply washing 50 itself can be reduced to the output of the walking system 20. The way meets the output demand of the walking system 20.

Further, when the demand output of the walking system 20 changes, the working state of the power supply system 50 and the generator 422 can be controlled to meet the output demand of the walking system 20, while keeping the internal combustion engine 421 at all levels. The preferred working area. The preferred operating area may be set in advance, and the internal combustion engine can be maintained in the preferred operating area set in advance. It is understandable that the hybrid tractor 1 may include multiple detectors and/or sensors, the hybrid tractor 1 may include at least one processor, and the detectors or sensors are respectively communicatively connected to述processor. The processing unit 62 may be communicably connected to the processor, or the processing unit 62 may be integrated or partially integrated with the processor. The monitoring unit 61 may be communicably connected to the detector and/or sensor. The monitoring unit 61 may also be integrated or partially integrated with the detector or the sensor.

The main drive motor monitoring module 6121 of the monitoring unit 61, the walking 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 power generation The machine monitoring module 6123 may be communicably connected to the detector and/or the sensor, or may be the main drive motor monitoring module 6121, the walking system monitoring module 611, and 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 integrated or partially integrated with the detector and/or the sensor. The main drive motor monitoring module 6121 of the monitoring unit 61, the walking 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 power generation The machine monitoring module 6123 may be respectively integrated with the corresponding one of the detectors or the sensors, or may be the main drive motor monitoring module 6121, the walking system monitoring module 611, the power supply system monitoring module 613, At least two of the power output shaft monitoring module 614, the internal combustion engine monitoring module 6122, and the generator monitoring module 6123 are integrated into the same detector and/or the same sensor.

Those skilled in the art can understand that the above-mentioned setting manner of the monitoring unit 61 is only an example for illustration and does not limit the present invention.

The processing unit 62 is based on the main drive motor monitoring module 6121 of the monitoring unit 61, the walking system monitoring module 611, the power supply system monitoring module 613, the power output shaft monitoring module 614, and the internal combustion engine monitoring The module 6122 and the generator monitoring module 6123 monitor or detect information obtained to generate a processing result. The control unit 63 controls the walking system 20 and the power output shaft based on the processing result of the processing unit 62 30. The power supply system 50 and the drive system 40.

For example, when the monitoring unit 61 detects that the output required by the walking 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 working Status, 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 working based on the processing result to meet the output of the walking system 20 demand. For the walking system 20, after the processing unit 62 receives the information acquired from the walking system monitoring module 611 of the walking system 20, if the processing unit 62 analyzes and finds the output required by the walking system 20 If the power is greater than the current real-time output power of the walking system 20, the processing unit 62 will generate a processing result, and the control unit 63 controls the main driving motor 41 based on the processing result so that the main driving motor 41 increases the output to the walking system 20.

For the generator 422, after the processing unit 62 receives the information obtained from the generator monitoring module 6123, if the processing unit 62 analyzes and finds that the current demand of the generator 422 is greater than the real time The processing unit 62 will generate a processing result, and the control unit 63 will adjust the generating torque of the generator 422 to meet the demand based on the processing result to the output of the generator 422 state After the power reaches the required power, the regulation stops.

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 and finds that the current external output of the internal combustion engine 421 is lower than the required output, The processing unit 62 will generate a processing result, and the control unit 63 adjusts the operating power or the speed of the internal combustion engine 421 based on the processing result to meet the external output demand.

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 power supply system 50 currently outputs less than When output is required, the processing unit 62 will generate 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 external output demand. In other words, 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, the processing unit 62 generates a processing result, and the control unit 63 adjusts the power supply based on the processing result. The operating power of the system 50 meets the demand for external output.

It is understandable 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 to be based on the generator monitoring module 6123 and the power The output shaft monitoring module 614 obtains information about the output demand of the internal combustion engine 421.

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 output shaft 30 meets the requirements of the generator 422 and the power output shaft 30, respectively 30 needs.

The control unit 63 can realize the control of the internal combustion engine 421 based on the demand output of the generator 422 and the demand output of the power output shaft 30. Further, the control unit 63 can also be based on the generator 422. The demand output of the power output shaft 30 and the demand output of the power output shaft 30 are respectively adjusted to the generator 422 and the power output shaft 30 so that the generator 422 and the power output shaft 30 meet the requirements, for example, The control unit 63 controls the torque of the generator 422, and the power output shaft 30 controls the rotation speed of the power output shaft 30.

It is worth mentioning that the control unit 63 can also control the main drive motor 41 and the range extender 42 so that they can work together. In other words, the control unit 63 can also separately control the walking system 20 and the power output shaft 30 so that they achieve dynamic balance.

Specifically, when the hybrid tractor 1 is in the second working mode,. The processing unit 62 receives the information from the walking 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 current power supply system 50 cannot meet all requirements. According to the output requirements of the walking system 20 and the internal combustion engine 421 is in a stopped working state, the processing unit 62 will generate a processing result. Based on the processing result, the control unit 63 controls the internal combustion engine 421 to start working and follow A certain output work meets the requirements of the walking system 20, and at this time the hybrid tractor 1 switches from the second working mode to the third working mode.

Further, based on the generator monitoring module 6123 and the power output shaft monitoring module 614, the processing unit 62 obtains the required torque of the generator 422 and the demand of the power output shaft 30 through the monitoring unit 61 The torque is generated and a processing result is generated, and the control unit 63 adjusts the internal combustion engine 421 based on the processing result so that the generator 422 and the power output shaft 30 reach the corresponding required torque. Based on the data obtained by the generator monitoring module 6123 and the main drive motor monitoring module 6121, the processing unit 62 generates a processing result, and the control unit 63 controls the main drive motor 41 according to the processing result. Output power to enable the walking system 20 and the power output shaft 30 to achieve dynamic balance.

More specifically, based on the information respectively acquired by the walking 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 be based on The processing result adjusts the power output of the generator 422 so that the walking system 20 and the power output shaft 30 reach a 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 output shaft 30 increases, and the control unit 63 controls the output increase of the internal combustion engine 421 based on the increase in the load of the power output shaft 30 to increase the output torque of the power output shaft 30 , The rotation speed of the power output shaft 30 remains constant, and for the generator 422, the output of the generator 422 comes from part of the input of the internal combustion engine 421, and the generator 422 needs to face the walking The system 20 outputs, and the working state of the generator 422 is affected by the internal combustion engine 421, the power output shaft 30 and the traveling system 20. The processing unit 62 can generate a processing result based on the state information and demand information of the internal combustion engine 421, the power output shaft 30 and the walking system 20 acquired by the monitoring unit 61, and the control unit 63 The processing result adjusts the torque of the generator 422, so that on the one hand, the generator 422 can meet the output demand of the walking system 20, and on the other hand, the output of the internal combustion engine 421 does not exceed the optimal working efficiency. The upper limit or the lower limit of, so as to achieve the dynamic balance of the walking system 20 and the power output shaft 30. It is worth mentioning that for the conventional tractor, the greater the external load of the power output shaft 30, the smaller the power output that the traveling system 20 can obtain from the internal combustion engine 421. As for the power output system 100 provided in this example, when the external load of the power output shaft 30 is greater, the output of the walking system 20 may not be reduced, and may even be increased according to demand.

Further, for the internal combustion engine 421, its output is determined by the generator 422 and the power output shaft 30, and the processing unit 62 is based on the information about the generator 422 and the power output shaft 30 acquired by the monitoring unit 61. The required torque of the power output shaft 30, and then after the generator 422 determines its required output based on the operating range of the internal combustion engine 421, the required output of the power output shaft 30 and the required output of the traveling system 20, the The power output of the generator 422 can be adjusted, and the internal combustion engine 421 can be adjusted by the output power of the generator 422 to keep its working power at the maximum output power stage and meet the output of the power output shaft 30 demand.

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 meet the output demand of the power output shaft 30 while achieving the maximum output power.

For example, when the load of the power output shaft 30 changes, the power of the internal combustion engine 421 between the power output shaft 30 and the generator 422 can be redistributed to keep the internal combustion engine 421 at the higher temperature. The load of the power output shaft 30 is satisfied under the premise of a good working area. When the output of the internal combustion engine 421 to the generator 422 changes, the power supply system 50 and the generator 422 cooperate to meet the output demand of the walking system 20. In this way, the walking The system 20 and the power output shaft 30 reach a state of dynamic equilibrium.

The hybrid tractor 1 further includes a power output system 100, wherein the power output system 100 includes the power output shaft 30 and the range extender 42, wherein the power output shaft 30 is drivably connected to the Mentioned range extender 42.

The power output system 100 further includes the main drive motor 41 and the power supply system 50, wherein the main drive motor 41 is electrically connected to the power supply system 50, wherein the range extender 42 The generator 422 can supply power to the power supply system 50.

The power output system 100 further includes a power output control unit, wherein the power output control unit includes a power output monitor, a power output processor, and a power output controller, wherein the power output monitor is communicable Ground is connected to the power output processor, and the power output processor is communicably connected to the power output controller.

The power output monitor is used to monitor the power output shaft 30 and/or the range extender 42, and the power output shaft monitor may also be used to monitor the main drive motor 41 and the power supply system 50.

A working method of the power output system 100 includes the following steps:

Obtaining the output demand of the power output shaft 30 through the power output monitor; and

The generator 422 and the internal combustion engine 421 are controlled based on the output demand of the power output shaft 30 so that the internal combustion engine 421 meets the output demand of the power output shaft 30 while maintaining a predetermined operating area.

According to another aspect of the present invention, the present invention provides a working method of the hybrid tractor 1, wherein the working method includes the following steps:

Obtain the output demand of the power output shaft 30 of the hybrid tractor 1; and

The control of the generator 422 based on the demand output of the power output shaft 30 controls the internal combustion engine 421 while keeping the internal combustion engine 421 in a preset operating area.

According to some embodiments of the present invention, in the above method, the working method further includes the following steps:

Obtain the output requirements of a walking system 20; and

The generator 422 is adjusted based on the output demand of the power output shaft 30 and the output demand of the walking system 20 while controlling the internal combustion engine 421 while keeping the internal combustion engine 421 at the preset working area.

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, and includes the following steps:

When a main drive motor 41 of the power output system 100 is used to monitor the power output system 100, the power of the internal combustion engine 421 is respectively distributed to a generator 422 and a generator 422 of the power output system 100. The power output shaft 30, wherein the energy (electric energy) of the main drive motor 41 comes from the generator 422; and

In response to the load detection of the power output shaft 30, the internal combustion engine 421 is at the maximum output power stage, and the power generation torque of the generator 422 is controlled to adjust the amount of power generation, thereby adjusting the walking load of the main drive motor 41 , So as to achieve the maximum output power 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 output shaft 30 is satisfied by adjusting the output torque request of the generator 422 for the internal combustion engine 421.

According to some embodiments of the present invention, in the above method, in response to the load of the walking system 20, the walking is adjusted by adjusting the output of the internal combustion engine 421 to the generator 422 and adjusting the output of a power supply system 50. The load of the system 20, wherein the power supply system 20 is connected to the main drive motor 41 so as to supply power.

According to some embodiments of the present invention, in the above-mentioned method, the output torque request of the generator 422 for the internal combustion engine 421 is adjusted to meet the output demand and the internal combustion engine 421 is maintained to operate within a preset operating region.

Those skilled in the art should understand that the above description and the embodiments of the present invention shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been completely and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the principles, the embodiments of the present invention may have any deformation or modification.

Claims

A range extender, matched with a power output shaft of a hybrid tractor, is characterized in that it includes:

An internal combustion engine;

A transfer case; and

A generator, wherein the generator is connected to the internal combustion engine through the transfer case, the power output shaft is adapted to be connected to the internal combustion engine through the transfer case, and the power generated by the internal combustion engine passes through all The transfer case is divided into two and is respectively transmitted to the generator and the power output shaft.
The range extender according to claim 1, wherein the power output shaft is shiftably connected to the transfer case.
The range extender according to claim 2, further comprising a first output shaft, wherein the internal combustion engine and the transfer case are transmitted through the first output shaft.
The range extender according to claim 2, further comprising a second output shaft, wherein the internal combustion engine and the power transmission shaft are transmitted through the second output shaft.
The range extender according to claim 1, further comprising an extended range controller, wherein the internal combustion engine, the transfer case, and the generator are respectively controllably connected to the range extended controller.
The range extender of claim 4, further comprising a range extender controller, wherein the internal combustion engine, the transfer case, and the generator are respectively controllably connected to the range extender controller.
A power output system, characterized in that it includes:

A power output shaft; and

A range extender, wherein the range extender further includes an internal combustion engine, a transfer case, and a generator, the generator is connected to the internal combustion engine through the transfer case, and the power output shaft is adapted to pass The transfer case is connected to the internal combustion engine, and the power generated by the internal combustion engine is transmitted to the generator and the power output shaft in two through the transfer case, wherein the power output shaft Is connected to the engine.
The power output system according to claim 7, further comprising a main drive motor and a power supply system, wherein the generator is enerably connected to the power supply system, wherein the main drive motor is energizedly connected to The generator.
A hybrid tractor, characterized in that it includes:

A car body

A walking system, wherein the walking system is installed on the vehicle body;

A power output shaft;

A power supply system;

A control system; and

A drive system, wherein the drive system is installed on the vehicle body, wherein the drive system includes a main drive motor and a range extender, and the range extender further includes an internal combustion engine, a transfer case, and a power generator The generator is connected to the internal combustion engine through the transfer case, the power output shaft is adapted to be connected to the internal combustion engine through the transfer case, and the power generated by the internal combustion engine passes through the transfer case. The box is divided into two and is respectively transmitted to the generator and the PTO shaft, wherein the main drive motor is energetically connected to the power supply system, wherein the main drive motor is drivably connected to In the generator, the walking system, the power output shaft, the power supply system, and the drive system are respectively controllably connected to the control system.
The hybrid tractor according to claim 9, wherein the control system includes a monitoring unit, a processing unit, and a control unit, wherein the monitoring unit is communicably connected to the walking system and the power output 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.
The hybrid tractor according to claim 10, wherein the hybrid tractor has a first working mode, a second working mode, and a third working mode. In the first working mode, the generator generates power and supplies The main drive motor is used, and only the main drive motor drives the walking system. In the second working mode, the range extender is only used as the power source of the power output shaft. Mode, the generator generates electricity and the range extender outputs to the power shaft, and the control unit controls the range extender so that the tractor is in the first working mode, the second Switch between the working mode and the third working mode.
The hybrid tractor according to claim 11, wherein the internal combustion engine and the generator are respectively controllably connected to the control unit, and when the load of the power output shaft changes, the control unit controls the The generator keeps the internal combustion engine in a preset working area when the output of the power output shaft is satisfied.
The hybrid tractor according to claim 11, wherein the internal combustion engine, the generator, and the power supply system are respectively controllably connected to the control unit, and when the output of the walking system changes, the control The unit controls the power supply system so that the generator and the power supply system maintain the internal combustion engine in a preset operating area while satisfying the output of the walking system.
The hybrid tractor according to claim 11, wherein the internal combustion engine, the generator, and the power supply system are respectively controllably connected to the control unit, and when the output demand of the walking system changes and the power When the load of the output shaft changes, the control unit controls the generator and the power supply system to meet the output of the traveling system and the load of the power output shaft while maintaining the internal combustion engine in a preset operating area.
A control method of a power output system applied to a hybrid tractor, characterized in that it includes the following steps:

When a main drive motor of a power output system provides power to a walking system, the power output system is monitored, wherein the power of an internal combustion engine of the power output system is respectively distributed to a generator of the power output system And a power output shaft, wherein the electrical energy of the main drive motor is derived from the generator; and

In response to the load detection of the power output shaft, the internal combustion engine is in the maximum output power stage, the power generation torque of the generator is controlled to adjust the power generation of the generator, wherein the walking system is drivably driven Connected to the main drive motor.
The control method according to claim 15, wherein in the above method, the output demand of the power output shaft is satisfied by adjusting the output torque request of the generator to the internal combustion engine.
The control method according to claim 15, wherein in the above method, in response to the load of the walking system, the walking system is adjusted by adjusting the output of the internal combustion engine to the generator and adjusting the output of a power supply system The load, wherein the power supply system is enerably connected to the main drive motor.
The control method according to claim 16, wherein in the above method, in response to the load of the traveling system, the traveling system is adjusted by adjusting the output of the internal combustion engine to the generator and adjusting the output of a power supply system The load, wherein the power supply system is enerably connected to the main drive motor.
The control method according to claim 17, wherein in the above method, the output torque request of the generator to the internal combustion engine is adjusted to meet the output demand and the internal combustion engine is maintained to operate in a preset operating region.
The control method according to claim 18, wherein in the above method, the output torque request of the generator to the internal combustion engine is adjusted to meet the output demand and the internal combustion engine is maintained to operate in a preset operating region.