Non-road mobile machine and power transmission device and control method thereof

Abstract

A non-road mobile machine, and a power transmission device and a control method thereof, the non-road mobile machine comprising a power transmission device, the power transmission device comprising: a transfer case comprising a case body, and an engine interface and a first output end arranged on the case body; the first output end is provided with a power generation interface; the engine is connected with the transfer case through an engine interface; the power generation mechanism is connected with the transfer case through a power generation interface; wherein the power generation mechanism comprises a first power generator and a second power generator, and the output end of the first power generator is connected with the first power utilization mechanism through the power generator controller; the engine drives the first generator to generate electricity through the transfer case, and voltage is converted through the generator controller and then input to the first electricity utilization mechanism. The output end of the second generator is connected with the second electricity utilization mechanism, and the engine drives the second generator to generate electricity through the transfer case and directly inputs the electricity into the second electricity utilization mechanism. The invention further provides a control method of the power transmission device.

Description

Technical Field

[0001] The present invention relates to a non-road mobile machine, in particular to a non-road mobile machine and a power transmission device and a control method thereof. Background Art

[0002] At present, the hybrid power transmission system of non-road mobile machinery is an engine-driven generator, which supplies power to the motor controllers of each system to drive the motor, and the motor then drives the hydraulic pump. Its structure is complex and has many transmission components, which reduces the transmission efficiency, making the overall structure more complex and the layout more difficult.

[0003] Furthermore, non-road mobile machinery requires 220V or 380V power. Traditional mechanical structures often use a hydraulic pump to drive a hydraulic motor, which in turn drives a 380V AC generator to output 220V or 380V AC. This structure results in a long transmission chain and low transmission efficiency. Hybrid non-road mobile machinery can use high-power DCAC to convert 600V DC power to 220V or 380V AC. However, due to limited application, product scarcity, high development costs for new products, and difficulties for host manufacturers, the host equipment cannot realize the relevant power functions. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a non-road mobile machine and a power transmission device and a control method thereof in view of the above-mentioned defects of the prior art.

[0005] In order to achieve the above-mentioned object, the present invention provides a power transmission device for a non-road mobile machinery, comprising:

[0006] The transfer case comprises a case body, an engine interface and a first output end provided on the case body; the first output end is provided with a power generation interface;

[0007] an engine connected to the transfer case via the engine interface;

[0008] a power generation mechanism connected to the transfer case via the power generation interface;

[0009] In which, the power generation mechanism includes a first generator and a second generator, the output end of the first generator is connected to the first power consumption mechanism through the generator controller; the engine drives the first generator through the transfer case to generate electricity, and the voltage is converted by the generator controller and input to the first power consumption mechanism; the output end of the second generator is connected to the second power consumption mechanism, and the engine drives the second generator through the transfer case to generate electricity and directly input it to the second power consumption mechanism.

[0010] The power transmission device of the non-road mobile machinery mentioned above further includes:

[0011] A distribution box is arranged between the generator controller and the first power consumption mechanism. The generator controller converts the AC power of the first generator into DC power and inputs it into the distribution box. The output end of the distribution box is respectively connected to the energy storage system and the first power consumption mechanism, and distributes electric energy to the energy storage system and the first power consumption mechanism as needed.

[0012] The power transmission device of the above-mentioned non-road mobile machinery also includes a VCU vehicle-mounted controller, which is respectively connected to the first power-consuming mechanism and the energy storage system. The first power-consuming mechanism includes a walking control component and an auger control component. The output ends of the walking control component and the auger control component are respectively connected to the walking motor and the auger motor.

[0013] The power transmission device of the non-road mobile machinery mentioned above further includes:

[0014] An engine controller is connected to the engine; the VCU on-board controller is connected to the generator controller and the engine controller respectively, the VCU on-board controller reads the load demand of the first power-consuming mechanism, and adjusts the speed of the engine through the engine controller and the power generation of the first generator through the generator controller.

[0015] The power transmission device of the non-road mobile machinery mentioned above further includes:

[0016] an engine controller connected to the engine; and

[0017] The range extender controller is connected to the generator controller, the VCU on-board controller and the engine controller respectively. The range extender controller controls the VCU on-board controller to read the load demand of the first power consumption mechanism, and adjusts the speed of the engine through the engine controller and the power generation of the first generator through the generator controller.

[0018] The power transmission device of the non-road mobile machinery mentioned above further includes:

[0019] A hydraulic pump is arranged in parallel with the power generation mechanism, the transfer case is provided with a second output end, the second output end is provided with a hydraulic pump interface, the hydraulic pump is connected to the transfer case through the hydraulic pump interface, and the engine synchronously adjusts the speed of the power generation mechanism and the hydraulic pump through the transfer case.

[0020] The above-mentioned power transmission device of non-road mobile machinery, wherein the hydraulic pump includes a scraper pump and a rammer pump, the hydraulic pump interface includes a first hydraulic pump interface and a second hydraulic pump interface, the scraper pump is installed on the first hydraulic pump interface and connected to the scraper motor; the rammer pump is installed on the second hydraulic pump interface and connected to the rammer motor; a scraper solenoid valve is arranged between the scraper pump and the scraper motor, and a rammer solenoid valve is arranged between the rammer pump and the rammer motor; the scraper solenoid valve and the rammer solenoid valve are respectively connected to the VCU vehicle-mounted controller, and the VCU vehicle-mounted controller respectively adjusts the output torque and speed of the scraper motor and the rammer motor through the scraper solenoid valve and the rammer solenoid valve.

[0021] The power transmission device of the non-road mobile machinery mentioned above, wherein the power transmission device also includes a heat dissipation mechanism, further includes:

[0022] Air guide hood;

[0023] A fan is provided corresponding to the air guide cover;

[0024] a heat dissipation component, disposed on one side of the air scoop, comprising an intercooler air radiator, an engine coolant radiator, an electric drive coolant radiator, and a hydraulic oil radiator arranged in parallel, wherein the intercooler air radiator and the engine coolant radiator are respectively connected to the engine; the electric drive coolant radiator is connected to the first power-consuming mechanism and the generator control assembly; and the hydraulic oil radiator is connected to the hydraulic pump; and

[0025] A fan speed change mechanism is connected to the fan; the fan speed change mechanism is connected to the VCU vehicle controller;

[0026] The VCU vehicle-mounted controller is connected to the heat dissipation component and controls the fan speed change mechanism to adjust the speed of the fan according to the temperature data of the heat dissipation component.

[0027] The above-mentioned power transmission device of the non-road mobile machinery, wherein the output end of the electric drive coolant radiator is provided with a first heat dissipation circuit, a second heat dissipation circuit and a third heat dissipation circuit in parallel; the travel control component is arranged on the first heat dissipation circuit; the auger control component is arranged on the second heat dissipation circuit; the generator controller and the power generation mechanism are arranged on the third heat dissipation circuit.

[0028] In order to better achieve the above-mentioned purpose, the present invention also provides a non-road mobile machinery, which includes the above-mentioned power transmission device.

[0029] In order to better achieve the above-mentioned object, the present invention further provides a method for controlling the power transmission device of the above-mentioned non-road mobile machinery, comprising the following steps:

[0030] S100: Starting the engine, which drives the first and second generators through the transfer case to generate electricity. The electric energy of the first generator is converted into a voltage by a generator controller and then input into a first power-consuming mechanism. The electric energy of the second generator is directly input into a second power-consuming mechanism.

[0031] S200, the engine synchronously adjusts the speeds of the first generator, the second generator, and the hydraulic pump through the transfer case;

[0032] S300, the VCU vehicle-mounted controller reads the load demand of the first power-consuming mechanism, and adjusts the speed of the engine through the engine controller and the power generation of the first generator through the generator controller; and

[0033] S400 , controlling a solenoid valve through the VCU onboard controller to adjust the output torque and speed of the motor connected to the hydraulic pump.

[0034] The beneficial effects of the present invention are:

[0035] The present invention effectively solves the requirements of different voltages required by different electrical components through the power generation mechanism, thereby simplifying the overall structure, further improving the transmission efficiency, and making the power supply more convenient to use; the engine can drive the power generation mechanism and the hydraulic pump at the same time through the transfer case, reducing the transmission components, achieving a compact and reasonable overall layout, and improving the overall transmission efficiency of the power transmission device; the engine can synchronously adjust the speed of the power generation mechanism and the hydraulic pump through the transfer case, so that the generator and the hydraulic pump can work in the high-efficiency zone for a longer time, further improving the overall power transmission efficiency of the power transmission device.

[0036] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this does not limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic structural diagram of a power transmission device according to an embodiment of the present invention;

[0038] Figure 2 This is a schematic structural diagram of a transfer case according to an embodiment of the present invention;

[0039] Figure 3 This is a schematic structural diagram of a heat dissipation mechanism according to an embodiment of the present invention;

[0040] Figure 4 This is a working principle diagram of a power transmission device according to an embodiment of the present invention.

[0041] Among them, the reference numerals

[0042] 1 engine

[0043] 2 transfer case

[0044] 21 cabinets

[0045] 22 engine interface

[0046] 23 power generation interface

[0047] 24 First hydraulic pump interface

[0048] 25 Second hydraulic pump interface

[0049] 26 Lubricating oil pump

[0050] 3 Power generation mechanism

[0051] 31 First Generator

[0052] 32 Second generator

[0053] 4 hydraulic pumps

[0054] 41 scraper pump

[0055] 42 rammer pump

[0056] 5. Heat dissipation mechanism

[0057] 51 air guide cover

[0058] 52 fans

[0059] 53 intercooler air radiator

[0060] 54 engine coolant radiator

[0061] 55 electric drive coolant radiator

[0062] 56 hydraulic oil radiator

[0063] 57 Fan speed change mechanism DETAILED DESCRIPTION

[0064] The structural principle and working principle of the present invention are described in detail below with reference to the accompanying drawings:

[0065] In the present invention, non-road mobile machinery refers to machinery used on non-roads, which is self-driven or has dual functions or is not self-driven but can be moved from one place or moved to another place, such as excavators, bulldozers, loaders, rollers, pavers, graders, groovers, pile-driving machinery, forklifts, cranes, loading and unloading machinery, tractors and asphalt transfer vehicles, etc., all of which can be installed and use the power transmission device of the present invention. Since the composition, structure, mutual position relationship, connection relationship and function of other parts of the non-road mobile machinery are all relatively mature existing technologies, they will not be described in detail here. Only the power transmission device of the present invention will be described in detail below.

[0066] See also Figure 1 and Figure 2 , Figure 1 FIG1 is a schematic structural diagram of a power transmission device according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the structure of a transfer case 2 according to an embodiment of the present invention. The power transmission device for non-road mobile machinery of the present invention comprises: a transfer case 2 comprising a case body 21, an engine interface 22 disposed on the case body 21, a first output port, and a lubricating oil pump 26; the first output port being provided with a power generation port 23; an engine 1, the output port of which is connected to the transfer case 2 via the engine interface 22. The engine 1 drives a generator 3 through the transfer case 2 to provide sufficient power for all electrical devices in the vehicle; and the generator 3 being connected to the transfer case 2 via the power generation port 23. The power generation mechanism 3 includes a first generator 31 and a second generator 32, which can be arranged in series. The output of the first generator 31 is connected to a first power consumption mechanism via a generator controller, which converts the voltage. The engine 1 drives the first generator 31 through the transfer case 2 to generate electricity, which is then converted by the generator controller and then input into the first power consumption mechanism. The output of the second generator 32 is connected to a second power consumption mechanism. The engine 1 drives the second generator 32 through the transfer case 2 to generate electricity, which is then directly input into the second power consumption mechanism. The second power consumption mechanism may include a post-ironing heating mechanism, a refrigerator, an air conditioner, a kettle, a power tool, a pneumatic tool, etc.

[0067] This embodiment further includes a hydraulic pump 4, arranged in parallel with the generator 3. The transfer case 2 is provided with a second output terminal, which is provided with a hydraulic pump interface. The hydraulic pump 4 is connected to the transfer case 2 via the hydraulic pump interface. The engine 1 drives the generator 3 through the transfer case 2 to generate electricity, and the transfer case 2 synchronously adjusts the speed of the generator 3 and the hydraulic pump 4. The engine 1 can simultaneously drive the generator 3 and the hydraulic pump 4 through the transfer case 2, which not only reduces the number of transmission components and achieves a compact and reasonable overall layout, but also improves the overall transmission efficiency of the power transmission device.

[0068] In this embodiment, the hydraulic pump 4 includes a scraper pump 41 and a rammer pump 42. The scraper pump 41 and the rammer pump 42 are preferably arranged in parallel, and motors are provided at the output ends of the scraper pump 41 and the rammer pump 42. The hydraulic pump interface includes a first hydraulic pump interface 24 and a second hydraulic pump interface 25. The scraper pump 41 is installed on the first hydraulic pump interface 24 and connected to the scraper motor; the rammer pump 42 is installed on the second hydraulic pump interface 25 and connected to the rammer motor. A scraper solenoid valve is provided between the scraper pump 41 and the scraper motor, and a rammer solenoid valve is provided between the rammer pump 42 and the rammer motor. The VCU on-board controller is connected to the scraper solenoid valve and the rammer solenoid valve, respectively, and adjusts the output torque and speed of the scraper motor and the rammer motor respectively through the scraper solenoid valve and the rammer solenoid valve. The scraper solenoid valve and the rammer solenoid valve are preferably hydraulic solenoid valves.

[0069] In this embodiment, the power supply circuit for the first generator 31 is as follows: engine 1 - transfer case 2 - first generator 31 - generator controller - distribution box - first power consumption mechanism. The engine 1 drives the first generator 31 through the transfer case 2 to generate 380V AC power. This power is then converted to 600V DC by the generator controller and transmitted to the first power consumption mechanism via the distribution box, thereby smoothly powering the first power consumption mechanism located at the output end of the distribution box for operation. The output end of the second generator 32 is provided with a second power consumption mechanism. The power supply circuit for the second generator 32 is as follows: engine 1 - transfer case 2 - second generator 32 - second power consumption mechanism. The second generator 32 directly powers the second power consumption mechanism. That is, the engine 1 drives the second generator 32 through the transfer case 2 to generate 220V or 380V AC power, which can be directly input into the second power consumption mechanism for operation. The engine 1 drives the transfer case 2 and then drives the generator 3 and the hydraulic pump 4 at the same time. The first generator 31 and the second generator 32 effectively solve the different voltage requirements of different electrical components, thereby simplifying the overall structure, further improving the transmission efficiency of the entire system, and making the power supply more convenient to use.

[0070] This embodiment may also include a VCU on-board controller, which is respectively connected to the first power-consuming mechanism and the energy storage system; the first power-consuming mechanism includes a travel control component and an auger control component, which are preferably arranged in parallel, and the output ends of the travel control component and the auger control component are respectively connected to the travel motor and the auger motor, and the distribution box can disperse the electrical energy and simultaneously transmit it to the corresponding first power-consuming mechanism. The travel control component includes left / right travel controllers arranged in parallel, and the auger control component includes left / right auger controllers, which are respectively connected to the VCU on-board controller, and the output ends of the left / right travel controller and the left / right auger controller are respectively connected to the travel motor and the auger motor. The left travel controller is connected to the left travel motor, and the right travel controller is connected to the right travel motor. The power distribution box can disperse the electric energy and supply power to the left travel controller and the right travel controller respectively, thereby driving the left travel motor and the right travel motor to operate respectively; the left auger controller is connected to the left auger motor, and the right auger controller is connected to the right auger motor. The power distribution box can supply power to the left auger controller and the right auger controller respectively, thereby driving the left auger motor and the right auger motor to operate respectively.

[0071] See also Figure 3 , Figure 3 Schematic diagram of the heat dissipation mechanism 5 according to an embodiment of the present invention. This embodiment also includes a heat dissipation mechanism 5, which can be arranged in the engine compartment of a non-road mobile machinery, including: an air duct 51; a fan 52, which is arranged corresponding to the air duct 51, and preferably the axis of rotation of the fan 52 is parallel to or coincides with the center line of the air duct 51, and the fan 52 is a high-power heat dissipation fan, and its power is preferably 10 to 20 kW; the rotation percentage of the fan 52 is 0 to 100%; a heat dissipation component, which is arranged on one side of the air duct 51, and the heat dissipation component includes an intercooler air radiator 53, an engine coolant radiator 54, an electric drive coolant radiator 55 and a hydraulic oil radiator 56 arranged in parallel, and the intercooler air radiator 53 and the engine coolant radiator 54 are connected in parallel. The coolant radiator 54 is connected to the engine 1; the electric drive coolant radiator 55 is connected to the first power-consuming mechanism and the generator control assembly, which includes the generator controller, the first generator 31, and the second generator 32; the hydraulic oil radiator 56 is connected to the hydraulic pump 4; and a fan speed change mechanism 57 is connected to the fan 52, which can be installed on the fan 52 and arranged coaxially with the fan 52; the fan speed change mechanism 57 is connected to the VCU vehicle controller; wherein the VCU vehicle controller is connected to the heat dissipation component and controls the fan speed change mechanism 57 to adjust the speed of the fan 52 based on the temperature data of the heat dissipation component. The fan speed change mechanism 57 can be a silicone oil clutch, a hydraulic motor, or a fan motor.

[0072] The output end of the electric drive coolant radiator 55 is connected in parallel to a first cooling circuit, a second cooling circuit, and a third cooling circuit. The travel controller is located on the first cooling circuit; the auger controller is located on the second cooling circuit; and the generator controller and generator are located on the third cooling circuit. The components in each cooling circuit have consistent flow requirements and flow resistance, ensuring a more balanced coolant flow through each cooling circuit. Cooling water pumps can also be installed in each of the first, second, and third cooling circuits, and all of them are connected to an expansion tank. That is, the first heat dissipation circuit: electric drive coolant radiator 55 - cooling water pump - left travel controller and left travel motor and right travel controller and right travel motor - electric drive coolant radiator 55; the second heat dissipation circuit: electric drive coolant radiator 55 - cooling water pump - left auger controller and left auger motor and right auger controller and right auger motor - electric drive coolant radiator 55; the third heat dissipation circuit: electric drive coolant radiator 55 - cooling water pump - generator controller and generator - electric drive coolant radiator 55.

[0073] In this embodiment, a temperature matrix of the engine intercooler air, engine coolant, hydraulic oil, and electric drive system coolant may also be provided in the VCU on-board controller. The VCU on-board controller intelligently adjusts the speed of the fan 52 according to the temperature data of the engine intercooler air, engine coolant, hydraulic oil, and electric drive system coolant, so that the intercooler air radiator 53, the engine coolant radiator 54, the electric drive coolant radiator 55, and the hydraulic oil radiator 56 reach the ideal operating temperature range, thereby extending the service life of the heat dissipation components and saving fuel and reducing noise. At the same time, it makes the thermal management more reasonable and the structure simpler, which can meet the heat dissipation requirements of the engine 1, the hydraulic system, and the electric drive system.

[0074] See also Figure 4 , Figure 4This is a working principle diagram of a power transmission device according to an embodiment of the present invention. In this embodiment, a distribution box may also be included, preferably a high-voltage distribution box PDU, which is connected to the first generator 31 through a generator controller. The generator controller converts the AC power of the first generator 31 into DC power and inputs it into the distribution box; wherein the output end of the distribution box is respectively connected to the energy storage system and the first power consumption mechanism, and the distribution box distributes the electric energy to the energy storage system and the first power consumption mechanism as needed. Preferably, the first output end of the distribution box is connected to the energy storage system, and the second output end is connected to the first power consumption mechanism. The engine 1 can drive the generator to generate electricity through the transfer case 2, and the electric energy is diverted through the distribution box, wherein a portion of the electric energy is input to the energy storage system, and the rest of the electric energy is input to the first power consumption mechanism. When the energy storage system has sufficient power and the generator's power generation is insufficient, the power of the energy storage system and the generator can be simultaneously input to the first power consumption mechanism through the distribution box. Under the joint action of the energy storage system and the generator, the electric drive system of the entire vehicle can be in a voltage-stabilized state to ensure the stability of the input voltage of the first power consumption mechanism; at the same time, the output peak power is greater.

[0075] This embodiment may further include an engine controller connected to the engine 1; the VCU onboard controller is connected to the generator controller and the engine controller, respectively. The VCU onboard controller reads the load demand of the first power consumer and adjusts the speed of the engine 1 through the engine controller and the power generation of the first generator 31 through the generator controller. In another embodiment, the engine controller and the range extender controller may be included. The engine controller is preferably an ECU engine controller connected to the engine 1; the range extender controller is preferably an RCU range extender controller, respectively connected to the generator controller, the VCU onboard controller, and the engine controller. The range extender controller controls the VCU onboard controller to read the load demand of the first power consumer, adjust the speed of the engine 1 through the engine controller, and adjust the power generation of the first generator 31 through the generator controller. That is, the RCU range extender controller reads the load requirements of the travel control component and the auger control component through the VCU on-board controller, and adjusts the speed of the engine 1 through the engine controller; the engine 1 can not only synchronously adjust the speed of the power generation mechanism 3 and the hydraulic pump 4 through the transfer case 2, but can also adjust the power generation of the first generator 31 through the generator controller to meet the load requirements of the auger control component and the travel control component. Since the hydraulic pump 4 can be adjusted to work at a variable speed according to the load requirements, the hydraulic pump 4 can be in a large-displacement working state for a longer period of time, further improving the transmission efficiency of the hydraulic system. In addition, since the speed of the scraper pump 41 and the rammer pump 42 will fluctuate when the engine controller adjusts the speed of the engine 1, the VCU on-board controller adjusts the solenoid valve to ensure that the output torque and speed of the scraper motor and the rammer motor can remain stable.

[0076] This embodiment can adopt two starting modes, starter starting and large generator reverse starting, as needed. During starter starting, the engine 1 is in the stopped state. The VCU vehicle controller establishes communication with the engine controller through the range extender controller and starts the engine 1 through the engine controller. During large generator reverse starting, the engine 1 is in the stopped state. The VCU vehicle controller establishes communication with the generator controller through the range extender controller and starts the first generator 31 through the generator controller. The first generator 31 rotates the engine 1 through the transfer case 2, thereby starting the engine 1. In large generator reverse starting mode, the instantaneous starting power can reach 120kW, significantly improving the starting power of the engine 1. This makes it easier to deal with the starting difficulties caused by excessive system load in non-road mobile machinery in high altitude and low temperature conditions, ensuring that the engine 1 can quickly enter the working state.

[0077] In addition, the large generator reverse-drag starting mode can also have the automatic start-stop function of engine 1. When the non-road mobile machinery is in working condition, turn on the automatic start-stop switch, and the engine 1 will automatically stop when idling without load for more than the set time, such as 60 seconds. Turn on any load switch, and the large generator will reverse-drag the engine to start quickly in 2 seconds, and the working state can be restored instantly, while reducing fuel consumption and noise pollution.

[0078] In this embodiment, the first generator 31, the generator controller, the distribution box and the first power-consuming mechanism are connected via a first line, which is a high-voltage circuit. The second generator 32 and the second power-consuming mechanism are also high-voltage lines; the engine controller, the RCU range extender controller, the generator controller and the VCU on-board controller are connected via a second line, which is a low-voltage communication line; the hydraulic pump 4 and each motor are connected via a third line, which is a hydraulic oil circuit.

[0079] During operation, the engine 1 and the transfer case 2 are used to drive the first generator 31 to generate electricity, and the voltage is converted through the generator controller to convert 380V AC into 600V DC; then the electric energy (i.e., 600V DC) is diverted through the distribution box, part of which is input into the energy storage system for storage and standby, and the other part is input into the first power consumption mechanism through the high-voltage bus for power supply; the range extender controller controls the VCU on-board controller to read the load demand of the first power consumption mechanism, and adjusts the speed of the engine 1 through the engine controller and the power generation of the first generator 31 through the generator controller, and synchronizes the speed of the first generator 31, the second generator 32 and the hydraulic pump 4 through the transfer case 2; the solenoid valve is controlled by the VCU on-board controller to adjust the output torque and speed of the motor.

[0080] The control method of the hybrid device of the present invention can be used to control the above hybrid device, and includes the following steps:

[0081] Step S100: Starting the engine, which drives the first generator and the second generator through the transfer case to generate electricity. The electric energy of the first generator is converted into a voltage by the generator controller and then input to the first power consumption mechanism. The electric energy of the second generator is directly input to the second power consumption mechanism.

[0082] Step S200: The engine synchronously adjusts the speeds of the first generator, the second generator, and the hydraulic pump through the transfer case;

[0083] Step S300: The VCU onboard controller reads the load demand of the first power consumer, and adjusts the engine speed through the engine controller and the power generation of the first generator through the generator controller. In this step, the load demand of the first power consumer can be directly read by the VCU onboard controller, or when the range extender controller is set, the range extender controller can control the VCU onboard controller to read the load demand of the first power consumer.

[0084] Step S400: Controlling a solenoid valve through the VCU onboard controller to adjust the output torque and speed of the motor connected to the hydraulic pump.

[0085] In this embodiment, the following steps may also be included:

[0086] Step S500: The electric energy is split through the distribution box, with a portion of the electric energy being input into the energy storage system and the other portion being input into the electric drive components.

[0087] When starting the engine in step S100, two starting methods, starter starting and large generator reverse starting, can be used as needed. During starter starting, engine 1 is stopped, and the VCU onboard controller establishes communication with the engine controller via the range extender controller, and starts engine 1 via the engine controller. During large generator reverse starting, engine 1 is stopped, and the VCU onboard controller establishes communication with the generator controller via the range extender controller, and starts first generator 31 via the generator controller. First generator 31 then rotates engine 1 via transfer case 2, thereby starting engine 1.

[0088] The large generator reverse-drag starting mode may also include an automatic start-stop method for the engine 1. When the non-road mobile machinery is in working condition, the automatic start-stop switch is turned on, and the engine 1 automatically stops when idling without load for more than a set time, such as 60 seconds. When any load switch is turned on, the first generator 31 reverse-drags the engine for 2 seconds to start quickly, and the working state can be restored instantly, while reducing fuel consumption and noise pollution.

[0089] In this embodiment, a thermal management step S600 may also be included, and a temperature matrix of the engine intercooler air, engine coolant, hydraulic oil, and electric drive system coolant is set in the VCU vehicle-mounted controller (as shown in the table below). The VCU vehicle-mounted controller intelligently adjusts the speed of the fan 52 according to the temperature data of the engine intercooler air, engine coolant, hydraulic oil, and electric drive system coolant, so that the intercooler air radiator 53, the engine coolant radiator 54, the electric drive coolant radiator 55, and the hydraulic oil radiator 56 reach the ideal operating temperature range.

[0090]

[0091] The system may also include a temperature alarm step S700. When the temperature of the engine intercooler air reaches a first set temperature, such as 120°C, the intercooler air radiator 53 alarms; when the temperature of the engine coolant reaches a second set temperature, such as 105°C, the engine coolant radiator 54 alarms; when the temperature of the hydraulic oil reaches a third set temperature, such as 85°C, the hydraulic oil radiator 56 alarms; and when the temperature of the electric drive device coolant reaches a fourth set temperature, such as 85°C, the electric drive coolant radiator 55 alarms. An engine coolant temperature alarm, an intercooler air temperature alarm, an electric drive coolant temperature alarm, and a hydraulic oil temperature alarm are installed on the corresponding heat dissipation circuits, respectively, and are connected to the VCU onboard controller to implement the above alarm functions.

[0092] The engine 1 of the present invention can simultaneously drive the generator 3 and hydraulic pump 4 through the transfer case 2, reducing transmission components and achieving a compact and rational overall layout while also improving the overall transmission efficiency of the power transmission system. The engine 1 can synchronously adjust the speed of the generator 3 and hydraulic pump 4 through the transfer case 2, allowing them to operate in their high-efficiency range for longer periods of time, further enhancing the overall power transmission efficiency of the power transmission system. The heat dissipation mechanism 5 integrates the thermal management system, reducing thermal management components and optimizing the cooling air flow, resulting in a simpler overall layout. The power transmission system's starting efficiency is improved by using both starter starting and large generator reverse starting. The large generator reverse starting method can more easily address starting difficulties caused by excessive system load in non-road mobile machinery operating in high altitude and low temperature conditions, ensuring that the engine 1 can quickly enter the operating state. Furthermore, combined with automatic start-stop technology, the power transmission system's fuel consumption and noise level are reduced, improving the equipment's economical use and driver comfort.

[0093] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A power transmission device for non-road mobile machinery, characterized in that: include: The transfer case comprises a case body, an engine interface and a first output end provided on the case body; the first output end is provided with a power generation interface; an engine connected to the transfer case via the engine interface; a power generation mechanism connected to the transfer case via the power generation interface; In which, the power generation mechanism includes a first generator and a second generator, the output end of the first generator is connected to the first power consumption mechanism through the generator controller; the engine drives the first generator through the transfer case to generate electricity, and the voltage is converted by the generator controller and input to the first power consumption mechanism; the output end of the second generator is connected to the second power consumption mechanism, and the engine drives the second generator through the transfer case to generate electricity and directly input it to the second power consumption mechanism.

2. The power transmission device for non-road mobile machinery according to claim 1, characterized in that: Also includes: a power distribution box, arranged between the generator controller and the first power-consuming mechanism, wherein the generator controller converts the AC power of the first generator into DC power and inputs the DC power into the power distribution box; The output end of the power distribution box is connected to the energy storage system and the first power consumption mechanism respectively, and distributes electric energy to the energy storage system and the first power consumption mechanism as needed.

3. The power transmission device for non-road mobile machinery according to claim 2, characterized in that: It also includes a VCU vehicle-mounted controller, which is respectively connected to the first power-consuming mechanism and the energy storage system. The first power-consuming mechanism includes a walking control component and an auger control component. The output ends of the walking control component and the auger control component are respectively connected to a walking motor and an auger motor.

4. The power transmission device for non-road mobile machinery according to claim 3, characterized in that: Also includes: An engine controller is connected to the engine; the VCU on-board controller is connected to the generator controller and the engine controller respectively, the VCU on-board controller reads the load demand of the first power-consuming mechanism, and adjusts the speed of the engine through the engine controller and the power generation of the first generator through the generator controller.

5. The power transmission device for non-road mobile machinery according to claim 3, characterized in that: Also includes: an engine controller connected to the engine; as well as The range extender controller is connected to the generator controller, the VCU on-board controller and the engine controller respectively. The range extender controller controls the VCU on-board controller to read the load demand of the first power consumption mechanism, and adjusts the speed of the engine through the engine controller and the power generation of the first generator through the generator controller.

6. The power transmission device for non-road mobile machinery according to claim 1, characterized in that: Also includes: A hydraulic pump is arranged in parallel with the power generation mechanism, the transfer case is provided with a second output end, the second output end is provided with a hydraulic pump interface, the hydraulic pump is connected to the transfer case through the hydraulic pump interface, and the engine synchronously adjusts the speed of the power generation mechanism and the hydraulic pump through the transfer case.

7. The power transmission device for non-road mobile machinery according to claim 6, characterized in that: Also included is a heat dissipation mechanism, further comprising: Air guide hood; A fan is provided corresponding to the air guide cover; a heat dissipation component, disposed on one side of the air scoop, comprising an intercooler air radiator, an engine coolant radiator, an electric drive coolant radiator, and a hydraulic oil radiator arranged in parallel, wherein the intercooler air radiator and the engine coolant radiator are respectively connected to the engine; the electric drive coolant radiator is connected to the first power-consuming mechanism and the generator control assembly; and the hydraulic oil radiator is connected to the hydraulic pump; and A fan speed change mechanism is connected to the fan; the fan speed change mechanism is connected to the VCU vehicle controller; The VCU vehicle-mounted controller is connected to the heat dissipation component and controls the fan speed change mechanism to adjust the speed of the fan according to the temperature data of the heat dissipation component.

8. The power transmission device for non-road mobile machinery according to claim 7, characterized in that: The output end of the electric drive coolant radiator is provided with a first heat dissipation circuit, a second heat dissipation circuit and a third heat dissipation circuit in parallel; the travel control component is arranged on the first heat dissipation circuit; the auger control component is arranged on the second heat dissipation circuit; the generator controller and the power generation mechanism are arranged on the third heat dissipation circuit.

9. A non-road mobile machine, characterized in that: Comprising a power transmission device according to any one of claims 1-8.

10. A method for controlling a power transmission device of a non-road mobile machinery according to any one of claims 1 to 8, comprising the following steps: S100: Starting the engine, which drives the first and second generators through the transfer case to generate electricity. The electric energy of the first generator is converted into a voltage by a generator controller and then input into a first power-consuming mechanism. The electric energy of the second generator is directly input into a second power-consuming mechanism. S200, the engine synchronously adjusts the speeds of the first generator, the second generator, and the hydraulic pump through the transfer case; S300, the VCU vehicle-mounted controller reads the load demand of the first power-consuming mechanism, and adjusts the speed of the engine through the engine controller and the power generation of the first generator through the generator controller; and S400 , controlling a solenoid valve through the VCU onboard controller to adjust the output torque and speed of the motor connected to the hydraulic pump.

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