ECVT tractor adopting integrated control mode

Abstract

The utility model discloses an ECVT tractor adopting an integrated control mode, which comprises a thermal management system, and the thermal management system comprises a thermal management electronic control unit, a radiator, an electronic fan, an engine cooling loop, a generator cooling loop, a motor cooling loop, a power battery cooling loop and a gearbox cooling loop. The cooling loops share a centrifugal water pump of the engine cooling loop, and each cooling loop is provided with a thermal management valve which is electrically connected with the thermal management electric control unit. Therefore, the centrifugal water pump of the engine is utilized, each cooling loop obtains the cooling liquid from the centrifugal water pump of the engine, the heat management valves are arranged on all the cooling loops to control the cooling liquid flow of each loop, and due to the fact that the centrifugal water pump is adopted by the engine, the loop flow control mode is increased; and when the loop flow is turned off for heat management, the power consumption of the centrifugal water pump can be reduced, and the effect of reducing the power consumption of accessories is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of tractors, in particular to an ECVT tractor adopting an integrated control mode. Background Art

[0002] ECVT tractors use hybrid engines, electric chassis, high-power generators, high-torque motors, high-voltage power batteries, low-voltage power batteries and other technologies to achieve stepless speed regulation, electronically controlled power switching, energy saving and consumption reduction, and on this basis, it is easier to realize unmanned driving of tractors. This technology is bound to be the main direction of future development of tractors, especially the main direction of development of high-horsepower intelligent tractors.

[0003] However, the ECVT tractor integrates the engine electronic control unit ECU, generator controller, motor controller, electronic hydraulic lifting system, electronic thermal management system, chassis electronic control unit PCU, vehicle instrument electronic control system, vehicle electronic gear lever button control system, unmanned driving electronic control system, power battery control system, especially the chassis electronic control unit PCU, which also integrates the chassis power switching electronic control system, chassis speed control and shifting electronic control system, PTO electronic output control system, and vehicle four-wheel drive electronic control system. ECVT requires that the control logic between the various electronic control units be matched, which is very difficult. For example, the electronic control coordination of the tractor's engine, generator, power battery, motor, and chassis at various torques; the coordination of the unmanned driving electronic control system and the tractor's power switching control system in the intelligent driving mode, the coordination of the chassis stepless speed regulation system, and the coordination of the electronic hydraulic lifting system.

[0004] Therefore, a general controller is needed to control the operation of each electronic control unit to complete the coordinated operation of the engine, engine, electric motor, electronically controlled chassis, electronically controlled lifting system, intelligent driving system, power battery system, and vehicle thermal management system.

[0005] Existing ECVT tractors use hybrid engines, electric chassis, high-power generators, high-torque motors, high-voltage power batteries and gearboxes, all of which require heat dissipation management. However, the cooling circuits of various components in existing ECVT tractors are mostly built separately, and water pumps are set separately, resulting in a complex thermal management system structure, high cost, high power consumption and difficult layout. Utility Model Content

[0006] In view of the above-mentioned deficiencies, the technical problem to be solved by the utility model is: to provide an ECVT tractor with an integrated control mode, which utilizes the centrifugal water pump of the engine cooling circuit so that each cooling circuit obtains coolant from the centrifugal water pump, and the centrifugal water pump increases the circuit flow control method without affecting the operation of the centrifugal water pump. While reducing the circuit flow for thermal management, it will reduce the power consumption of the centrifugal water pump, thereby reducing the power consumption of accessories.

[0007] In order to solve the above technical problems, the technical solution of the utility model is:

[0008] An ECVT tractor adopting an integrated control mode includes a thermal management system, the thermal management system includes a thermal management electronic control unit, a radiator arranged at the front end of the engine, an electronic fan arranged behind the radiator, and an engine cooling circuit, the engine cooling circuit includes an engine, a centrifugal water pump and an engine cooling pipeline connecting the engine and the centrifugal water pump, an engine thermal management valve is arranged on the engine cooling pipeline, the electronic fan, the centrifugal water pump, and the engine thermal management valve are electrically connected to the thermal management electronic control unit respectively; the thermal management system also includes:

[0009] A generator cooling circuit, the generator cooling circuit comprising a generator cooling pipeline and a generator thermal management valve provided on the generator cooling pipeline, the generator cooling pipeline communicating with the generator and the centrifugal water pump, the generator thermal management valve being electrically connected to the thermal management electronic control unit;

[0010] A motor cooling circuit, the motor cooling circuit comprising a motor cooling pipeline and a motor thermal management valve provided on the motor cooling pipeline, the motor cooling pipeline communicating with the motor and the centrifugal water pump, the motor thermal management valve being electrically connected to the thermal management electronic control unit;

[0011] A power battery cooling circuit, the power battery cooling circuit comprising a power battery cooling pipeline and a power battery thermal management valve provided on the power battery cooling pipeline, the power battery cooling pipeline communicating with the power battery and the centrifugal water pump, the power battery thermal management valve being electrically connected to the thermal management electronic control unit;

[0012] A gearbox cooling circuit, the gearbox cooling circuit includes a gearbox cooling pipeline and a gearbox thermal management valve arranged on the gearbox cooling pipeline, the gearbox cooling pipeline connects the gearbox and the centrifugal water pump, and the gearbox thermal management valve is electrically connected to the thermal management electronic control unit.

[0013] In a preferred embodiment, the thermal management system further comprises a closed-loop electronic control unit, the closed-loop electronic control unit is electrically connected to the thermal management electronic control unit, the closed-loop electronic control unit comprises a plurality of temperature sensors, and the plurality of temperature sensors are respectively arranged on the engine cooling pipeline, the generator cooling pipeline, the motor cooling pipeline, the power battery cooling pipeline and the gearbox cooling pipeline;

[0014] The thermal management electronic control unit controls the speed of the electronic fan according to the coolant temperature collected by the closed-loop electronic control unit.

[0015] A preferred embodiment is that the tractor further includes an integrated electronic control unit, and an electronic control button unit, an engine electronic control unit, a chassis electronic control unit, a power battery electronic control unit and a motor electronic control unit which are electrically connected to the integrated electronic control unit respectively; the integrated electronic control unit is also electrically connected to the thermal management electronic control unit; the integrated electronic control unit is communicatively connected to the engine electronic control unit via a CAN communication unit; and the integrated electronic control unit, the thermal management electronic control unit, the chassis electronic control unit, the power battery electronic control unit and the motor electronic control unit are integrated.

[0016] Preferably, the electronic control button unit includes a PTO electronic control button, and when the PTO electronic control button is pressed, the integrated electronic control unit controls the engine to directly supply power to the electric motor via the generator.

[0017] Preferably, the tractor further includes a vehicle instrument, and the vehicle instrument is electrically connected to the integrated electronic control unit.

[0018] Preferably, the tractor further comprises an electronically controlled hydraulic lifting electronic control unit, the electronically controlled hydraulic lifting electronic control unit is electrically connected to the integrated electronic control unit, and the electronically controlled hydraulic lifting electronic control unit is electrically connected to the integrated electronic control unit and integrated.

[0019] Preferably, the tractor further comprises an intelligent driving electronic control unit, the intelligent driving electronic control unit is electrically connected to the integrated electronic control unit, and the intelligent driving electronic control unit is electrically connected and integrated with the integrated electronic control unit.

[0020] A preferred embodiment is that the front end of the engine is connected to the front axle bracket, and the front axle bracket is connected to the four-wheel drive front axle or the two-wheel drive front axle; the rear end of the engine is connected to the generator, and the rear end of the generator is connected to the electric motor; electric energy is transmitted between the generator and the electric motor through the power battery, and the electric motor is connected to the electronically controlled chassis through a spline; the rear end of the electronically controlled chassis is provided with an electronically controlled PTO output shaft, and an electric four-wheel drive output gearbox is provided under the electronically controlled chassis, and the electronically controlled chassis is connected to the rear axle to output power to the rear wheels.

[0021] After adopting the above technical solution, the beneficial effects of the utility model are:

[0022] Since the ECVT tractor of the utility model adopts an integrated control mode, it includes a thermal management system, which includes a thermal management electronic control unit, a radiator, an electronic fan, an engine cooling circuit, a generator cooling circuit, an electric motor cooling circuit, a power battery cooling circuit and a gearbox cooling circuit. Each cooling circuit shares the centrifugal water pump of the engine cooling circuit. At the same time, each cooling circuit is provided with a thermal management valve, which is electrically connected to the thermal management electronic control unit. It can be seen that the tractor of the utility model utilizes the centrifugal water pump of the engine cooling water circuit, so that each cooling circuit obtains coolant from the centrifugal water pump of the engine. Thermal management valves are provided on all cooling circuits to control the coolant flow of each cooling circuit. At the same time, since the engine adopts a centrifugal water pump, increasing the loop flow control method will not affect the operation of the centrifugal water pump. When the loop flow is reduced for thermal management, the power consumption of the centrifugal water pump will be reduced, which plays a role in reducing the power consumption of the accessories. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a principle block diagram of the ECVT tractor adopting the integrated control mode in the utility model;

[0024] Figure 2 It is a schematic diagram of the thermal management system in the utility model;

[0025] In the figure: 1- thermal management electronic control unit, 2- centrifugal water pump, 3- engine, 4- generator, 5- power battery, 6- electric motor, 7- gearbox, 8- rear axle, 9- electronically controlled PTO output shaft, 10- temperature sensor. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0027] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0028] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0029] like Figure 2 As shown, an ECVT tractor adopting an integrated control mode includes a thermal management system, which includes a thermal management electronic control unit 1, a radiator arranged at the front end of an engine 3, an electronic fan arranged behind the radiator, an engine cooling circuit, a generator cooling circuit, an electric motor cooling circuit, a power battery cooling circuit and a gearbox cooling circuit, and the electronic fan and the centrifugal water pump 2 are electrically connected to the thermal management electronic control unit 1. The thermal management system also includes a closed-loop electronic control unit, which is electrically connected to the thermal management electronic control unit 1. The closed-loop electronic control unit includes a plurality of temperature sensors 10. The thermal management electronic control unit 1 controls the speed of the electronic fan according to the coolant temperature collected by the closed-loop electronic control unit.

[0030] The engine cooling circuit is used to cool the engine 3. The engine cooling circuit includes the engine 3, the centrifugal water pump 2 and an engine cooling pipeline connecting the engine 3 and the centrifugal water pump 2. An engine thermal management valve is provided on the engine cooling pipeline. The engine thermal management valve is electrically connected to the thermal management electronic control unit 1. A temperature sensor 10 is provided on the engine cooling pipeline. This temperature sensor 10 collects the coolant temperature in the engine cooling pipeline and transmits it to the thermal management electronic control unit 1.

[0031] The generator cooling circuit is used to cool the generator 4. The generator cooling circuit includes a generator cooling pipeline and a generator thermal management valve arranged on the generator cooling pipeline. The generator cooling pipeline connects the generator 4 and the centrifugal water pump 2. The generator thermal management valve is electrically connected to the thermal management electronic control unit 1. A temperature sensor 10 is arranged on the generator cooling pipeline. This temperature sensor 10 collects the coolant temperature in the generator cooling pipeline and transmits it to the thermal management electronic control unit 1.

[0032] The motor cooling circuit is used to cool the motor 6. The motor cooling circuit includes a motor cooling pipeline and a motor thermal management valve arranged on the motor cooling pipeline. The motor cooling pipeline connects the motor 6 and the centrifugal water pump 2. The motor thermal management valve is electrically connected to the thermal management electronic control unit 1. A temperature sensor 10 is arranged on the motor cooling pipeline. This temperature sensor 10 collects the coolant temperature in the motor cooling pipeline and transmits it to the thermal management electronic control unit 1.

[0033] The power battery cooling circuit is used to cool the power battery 5. The power battery cooling circuit includes a power battery cooling pipeline and a power battery thermal management valve arranged on the power battery cooling pipeline. The power battery cooling pipeline connects the power battery 5 and the centrifugal water pump 2. The power battery thermal management valve is electrically connected to the thermal management electronic control unit 1. A temperature sensor 10 is arranged on the power battery cooling pipeline. This temperature sensor 10 collects the coolant temperature in the power battery cooling pipeline and transmits it to the thermal management electronic control unit 1.

[0034] The gearbox cooling circuit is used to cool the gearbox. The gearbox cooling circuit includes a gearbox cooling pipeline and a gearbox thermal management valve arranged on the gearbox cooling pipeline. The gearbox cooling pipeline connects the gearbox 7 and the centrifugal water pump 2. The gearbox thermal management valve is electrically connected to the thermal management electronic control unit 1. A temperature sensor 10 is arranged on the gearbox cooling pipeline. This temperature sensor 10 collects the coolant temperature in the power battery cooling pipeline and transmits it to the thermal management electronic control unit 1.

[0035] like Figure 2 As shown, the thermal management system of the tractor of the utility model mainly utilizes the centrifugal water pump 2 of the engine cooling circuit, so that the coolant of the engine cooling circuit, the generator cooling circuit, the motor cooling circuit, the power battery cooling circuit and the gearbox cooling circuit all obtain the coolant from the centrifugal water pump 2. Since the utility model adopts the centrifugal water pump 2, when the coolant flow of a certain cooling circuit is increased, it will not affect the operation of the centrifugal water pump 2. While reducing the coolant flow of the circuit for thermal management, the power consumption of the centrifugal water pump 2 will be reduced, which plays a role in reducing the power consumption of accessories.

[0036] like Figure 2 As shown, the thermal management system of the utility model adopts the same radiator and electronic fan for heat dissipation. The electronic fan collects the coolant temperature of each cooling circuit and the opening of the thermal management valve on each cooling pipeline through the thermal management electronic control unit 1 to obtain the optimal speed that the electronic fan needs to provide. The speed control can be obtained by bench calibration. By calibrating the speed required for the electronic fan to achieve thermal balance of each cooling circuit under different ambient temperatures and vehicle output conditions on the bench, it is calibrated into a control MAP. In the actual temperature control process, the control MAP is used to control the speed of the electronic fan.

[0037] A mechanical centrifugal water pump 2 driven by an engine 3 is used to provide a cooling hydraulic head for each cooling circuit of the thermal management system, and a thermal management valve is provided to control the coolant flow of each coolant circuit to manage the power consumption of the centrifugal water pump 2, without the need for additional electronic water pumps and electronic water pump controllers; a thermal management valve with opening control is used to control the flow of each coolant circuit to achieve the purpose of controlling the cooling heat of each coolant circuit, and in conjunction with the temperature sensor 10 on each cooling pipeline, a closed-loop control is formed for the temperature control of each cooling circuit; the integrated control cooling system uses a set of radiators, and the electronic fan quantitatively controls the heat dissipation of the radiator and the heat dissipation power consumption of the electronic fan according to the bench calibration MAP.

[0038] Specifically, the temperature of the coolant in the engine cooling circuit is controlled by the engine thermal management valve and the electronic fan. The target temperature of the engine thermal management valve is controlled to 92-94°C. A target temperature of 92°C is used in the low power range. The higher the power, the lower the target temperature. The coolant temperature collected by the temperature sensor 10 on the engine cooling pipeline is used as the target for PID control. The electronic fan uses a table to control the speed. The control logic is shown in the following table.

[0039] Coolant temperature ≤94℃ 95℃ 96℃ 97℃ 98℃ 99℃ 100℃ Fan speed 0％ 10 20％ 40％ 60％ 80％ 100％

[0040] The coolant temperature of the generator cooling circuit is controlled by the generator thermal management valve and the electronic fan. The target temperature of the generator thermal management valve is controlled to 55°C. The PID control is performed based on the coolant temperature of the generator 4 outlet water. The electronic fan uses a table to control the speed. The control logic is shown in the following table;

[0041] The coolant temperature of the motor cooling circuit is controlled by the motor thermal management valve and the electronic fan. The target temperature of the motor thermal management valve is controlled to 55°C. The PID control is performed based on the outlet water coolant temperature of the motor 6. The electronic fan uses a table to control the speed. The control logic is shown in the following table;

[0042] Coolant temperature ≤55℃ 56℃ 57℃ 58℃ 59℃ 60℃ 61℃ Fan speed 0％ 10 20％ 40％ 60％ 80％ 100％

[0043] The coolant temperature of the power battery cooling circuit is controlled by the power battery thermal management valve and the electronic fan. The target temperature of the power battery thermal management valve is controlled to 45°C. PID control is performed based on the outlet coolant temperature of the power battery 5. The electronic fan uses a table to control the speed. The control logic is shown in the following table.

[0044] Coolant temperature ≤45℃ 46℃ 47℃ 48℃ 49℃ 50℃ 51℃ Fan speed 0％ 10 20％ 40％ 60％ 80％ 100％

[0045] The coolant temperature of the transmission cooling circuit is controlled by the transmission thermal management valve and the electronic fan. The target temperature of the transmission thermal management valve is controlled to 60°C. PID control is performed based on the transmission oil temperature 7 as the target. The electronic fan uses a table to control the speed. The control logic is shown in the following table;

[0046] Coolant temperature ≤60℃ 61℃ 62℃ 63℃ 64℃ 65℃ 66℃ Fan speed 0％ 10 20％ 40％ 60％ 80％ 100％

[0047] like Figure 1 As shown, the tractor of the utility model also includes an integrated electronic control unit, and an electronic control button unit, an engine electronic control unit, a chassis electronic control unit, a power battery electronic control unit and a motor electronic control unit which are electrically connected to the integrated electronic control unit respectively. The integrated electronic control unit is also electrically connected to the thermal management electronic control unit 1, and the integrated electronic control unit is communicatively connected to the engine electronic control unit via a CAN communication unit; and the integrated electronic control unit, the thermal management electronic control unit 1, the chassis electronic control unit, the power battery electronic control unit and the motor electronic control unit are integrated.

[0048] In this embodiment, the electronic control button unit includes a PTO electronic control button. When the PTO electronic control button is pressed, the integrated electronic control unit controls the engine 3 to directly supply power to the motor 6 through the generator 4.

[0049] The tractor also includes a vehicle instrument, which is electrically connected to the integrated electronic control unit.

[0050] The tractor also includes an electronically controlled hydraulic lifting electronic control unit, which is electrically connected to the integrated electronic control unit, and the electronically controlled hydraulic lifting electronic control unit is electrically connected to the integrated electronic control unit and integrated.

[0051] The tractor also includes an intelligent driving electronic control unit, which is electrically connected to the integrated electronic control unit, and the intelligent driving electronic control unit is electrically connected to the integrated electronic control unit and integrated.

[0052] like Figure 1 As shown, the front end of the engine 3 is connected to the front axle bracket, the front axle bracket is connected to the four-wheel drive front axle or the two-wheel drive front axle, the rear end of the engine 3 is connected to the generator 4, the rear end of the generator 4 is connected to the motor 6, the generator 4 and the motor 6 transmit electric energy through the power battery 5, the motor 6 is connected to the electronically controlled chassis through a spline, the rear end of the electronically controlled chassis is provided with an electronically controlled PTO output shaft 9, the bottom of the electronically controlled chassis is provided with an electric four-wheel drive output gearbox, the electronically controlled chassis is connected to the rear axle 8, and outputs power to the rear wheels.

[0053] like Figure 1As shown, the utility model is provided with a main board, on which an integrated electronic control unit, a chassis electronic control unit, a generator electronic control unit, a motor electronic control unit, a thermal management control unit, an electronic control unit for electronic hydraulic lifting, an intelligent driving electronic control unit and a power battery electronic control unit are integrated, and the integrated electronic control unit communicates with the engine electronic control unit through a CAN communication unit, collects the operating speed, torque, power, water temperature and oil temperature signals of the engine 3, and sends control instructions to the engine electronic control unit to control the operation of the engine 3.

[0054] In actual use, the integrated electronic control unit obtains the driver's operating commands through the electronic control buttons in the cab, and issues commands to control the operation of the engine 3 through the CAN communication method. After the engine 3 generates electricity, it is output to the motor 6 through the integrated motor electronic control unit and power battery electronic control unit. The power battery 5 uses a small-capacity power battery 5 with a capacity of 8KWh, which reduces the performance degradation of the battery caused by the seasonal operation of the tractor.

[0055] When the chassis power consumption is less than 40% of the rated power of the engine 3, the motor electronic control unit draws power from the battery to power the motor 6, and the engine 3 generates electricity at the rated speed. After the battery is fully charged to 100%, the engine 3 runs at idle speed. When the battery power drops to 50%, the engine 3 generates electricity at the rated speed again. When the chassis power consumption exceeds 40%, the motor electronic control unit controls the engine 3 to directly power the motor 6. After the battery is fully charged, it no longer powers the motor 6. At this time, the integrated electronic control unit controls the engine 3 to run at the power generation power required by the motor 6.

[0056] After the PTO electronic control button is started, the generator directly supplies power to the motor 6 , also without buffering by the power battery 5 , thus protecting the power battery 5 .

[0057] In summary, the tractor of the present invention utilizes the centrifugal water pump 2 of the engine cooling circuit to provide coolant for each cooling circuit, thereby reducing the cost of the thermal management system, simplifying the structural layout, and reducing the power consumption of accessories. The coolant temperature of each cooling circuit is collected through the temperature sensor 10 on each cooling pipeline, and the coolant flow of each cooling circuit is controlled by using a calibrated MAP table, thereby realizing closed-loop control, so that the heat dissipation effect meets the actual operation requirements. At the same time, the present invention is provided with an integrated electronic control unit, especially integrating each electronic control unit with the integrated electronic control unit on a main board, thereby realizing electronic control between various components.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications made within the spirit and principles of the present invention, improvements to an ECVT tractor that adopts an integrated control mode, etc., should be included in the scope of protection of the present invention.

Claims

1. An ECVT tractor adopting an integrated control mode, comprising a thermal management system, wherein the thermal management system comprises a thermal management electronic control unit, a radiator arranged at the front end of an engine, an electronic fan arranged behind the radiator, and an engine cooling circuit, wherein the engine cooling circuit comprises an engine, a centrifugal water pump, and an engine cooling pipeline connecting the engine and the centrifugal water pump, an engine thermal management valve is arranged on the engine cooling pipeline, and the electronic fan, the centrifugal water pump, and the engine thermal management valve are electrically connected to the thermal management electronic control unit respectively; characterized in that, The thermal management system further comprises: A generator cooling circuit, the generator cooling circuit comprising a generator cooling pipeline and a generator thermal management valve provided on the generator cooling pipeline, the generator cooling pipeline communicating with the generator and the centrifugal water pump, the generator thermal management valve being electrically connected to the thermal management electronic control unit; A motor cooling circuit, the motor cooling circuit comprising a motor cooling pipeline and a motor thermal management valve provided on the motor cooling pipeline, the motor cooling pipeline communicating with the motor and the centrifugal water pump, the motor thermal management valve being electrically connected to the thermal management electronic control unit; A power battery cooling circuit, the power battery cooling circuit comprising a power battery cooling pipeline and a power battery thermal management valve provided on the power battery cooling pipeline, the power battery cooling pipeline communicating with the power battery and the centrifugal water pump, the power battery thermal management valve being electrically connected to the thermal management electronic control unit; A gearbox cooling circuit, the gearbox cooling circuit includes a gearbox cooling pipeline and a gearbox thermal management valve arranged on the gearbox cooling pipeline, the gearbox cooling pipeline connects the gearbox and the centrifugal water pump, and the gearbox thermal management valve is electrically connected to the thermal management electronic control unit.

2. The ECVT tractor with integrated control mode according to claim 1, characterized in that: The thermal management system further includes a closed-loop electronic control unit, which is electrically connected to the thermal management electronic control unit. The closed-loop electronic control unit includes a plurality of temperature sensors, which are respectively arranged on the engine cooling pipeline, the generator cooling pipeline, the motor cooling pipeline, the power battery cooling pipeline and the gearbox cooling pipeline; The thermal management electronic control unit controls the speed of the electronic fan according to the coolant temperature collected by the closed-loop electronic control unit.

3. The ECVT tractor with integrated control mode according to claim 1, characterized in that: The tractor further comprises an integrated electronic control unit, and an electronic control button unit, an engine electronic control unit, a chassis electronic control unit, a power battery electronic control unit and a motor electronic control unit which are electrically connected to the integrated electronic control unit respectively, the integrated electronic control unit is also electrically connected to the thermal management electronic control unit, and the integrated electronic control unit is communicatively connected to the engine electronic control unit via a CAN communication unit; The integrated electronic control unit, the thermal management electronic control unit, the chassis electronic control unit, the power battery electronic control unit and the motor electronic control unit are integrated.

4. The ECVT tractor with integrated control mode according to claim 3, characterized in that: The electric control button unit includes a PTO electric control button. When the PTO electric control button is pressed, the integrated electric control unit controls the engine to directly supply power to the electric motor via the generator.

5. The ECVT tractor with integrated control mode according to claim 3, characterized in that: The tractor further comprises a vehicle instrument, and the vehicle instrument is electrically connected to the integrated electronic control unit.

6. The ECVT tractor with integrated control mode according to claim 3, characterized in that: The tractor further comprises an electric-controlled hydraulic lifting electric-control unit, the electric-controlled hydraulic lifting electric-control unit is electrically connected to the integrated electric-control unit, and the electric-controlled hydraulic lifting electric-control unit is electrically connected to the integrated electric-control unit and integrated.

7. The ECVT tractor with integrated control mode according to claim 3, characterized in that: The tractor further comprises an intelligent driving electronic control unit, which is electrically connected to the integrated electronic control unit, and the intelligent driving electronic control unit is electrically connected and integrated with the integrated electronic control unit.

8. The ECVT tractor with integrated control mode according to claim 3, characterized in that: The front end of the engine is connected to the front axle bracket, and the front axle bracket is connected to the four-wheel drive front axle or the two-wheel drive front axle; The rear end of the engine is connected to a generator, and the rear end of the generator is connected to the electric motor; The generator and the motor transmit electric energy through the power battery, and the motor is connected to the electronically controlled chassis through a spline; The rear end of the electronically controlled chassis is provided with an electronically controlled PTO output shaft, and the lower part of the electronically controlled chassis is provided with an electric four-wheel drive output gearbox. The electronically controlled chassis is connected to the rear axle to output power to the rear wheels.

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