Heat balance system and test method

Abstract

The invention belongs to the technical field of testing, and particularly relates to a heat balance system comprising a hybrid power system comprising an engine and an output motor; the control module comprises a motor controller; the functional system comprises a water heat dissipation circulating system, a lubricating oil heat dissipation circulating system, a fuel oil system, a fuel oil and lubricating oil heat exchange system and an air cooling heat dissipation system; the combination of at least one or more of the lubricating oil heat dissipation circulation system, the fuel oil system, the water heat dissipation circulation system, the fuel and lubricating oil heat exchange system and the air cooling heat dissipation system is used for conducting heat dissipation on any one or more of a bearing of an engine, a bearing of an output motor and a motor controller. The fuel oil system is further used for combustion of the engine. According to the invention, the test of various different heat dissipation combinations of the hybrid power system can be realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of testing, and particularly relates to a thermal balance system and a testing method. Background Art

[0002] For a hybrid power system, thermal balance management is required. Since the cooling of the hybrid power system is complex, and considering comprehensiveness such as power consumption and energy conservation, it is necessary to consider using multiple media for thermal balance.

[0003] Currently, during general thermal balance testing, it is mainly for the performance testing of the engine alone, and there is no testing for complex systems, lacking universality and flexibility. Summary of the Invention

[0004] Aiming at the above technical problems, the present invention aims to provide a thermal balance system and a testing method.

[0005] A thermal balance system, the thermal balance system includes:

[0006] A hybrid power system, the hybrid power system includes an engine and an output motor that drives and outputs electricity by the engine;

[0007] A control module, the control module includes a motor controller of the output motor;

[0008] A functional system, the functional system includes a water cooling circulation system, a lubricating oil cooling circulation system, a fuel system, a fuel-lubricating oil heat exchange system, and an air cooling system;

[0009] The water cooling circulation system is used for cooling the motor controller;

[0010] At least one or a combination of multiple of the lubricating oil cooling circulation system, the fuel system, the water cooling circulation system, the fuel-lubricating oil heat exchange system, and the air cooling system is used for cooling any one or more of the bearings of the engine, the bearings of the output motor, and the motor controller;

[0011] The fuel system is also used for the engine to burn.

[0012] Optionally, the control module is located on the side of the hybrid power system, the functional system is a primary functional system for primary function testing, and the primary functional system is located around the hybrid power system and the control module.

[0013] Optionally, taking the exhaust port of the engine as the front end;

[0014] The water cooling circulation system is located at the front side of the engine, the lubricating oil cooling circulation system is located at the left side of the engine, the fuel system is located at the right side of the engine, and the fuel-lubricating oil heat exchange system and the air cooling system are located at the rear side of the engine.

[0015] Optionally, the heat balance system further includes a secondary function system for subsequent tests. The secondary function system includes some or all of the functional components of the primary function system scaled down by several times. The secondary function system and the control module are respectively integrated around the hybrid power system.

[0016] Optionally, the secondary function system includes any one or more of the lubricating oil cooling circulation system, the fuel system, the water cooling circulation system, the fuel-lubricating oil heat exchange system, and the air cooling system scaled down by several times relative to the primary function system. At this time, the volume of each controller included in the control module corresponding to the secondary function system is reduced relative to the primary function system and integrated into the output motor.

[0017] Optionally, the water cooling circulation system is used to cool the motor controller. The water cooling circulation system includes:

[0018] A water tank. The water outlet of the water tank is connected to the electric controller cooling inlet of the motor controller through a pipeline, and the water return port of the water tank is connected to the electric controller cooling outlet of the motor controller through a pipeline.

[0019] Optionally, a water filter is provided on the pipeline between the water outlet of the water tank and the electric controller cooling inlet of the motor controller. A three-way valve for water cooling is provided between the water outlet of the water tank and the water filter. The other outlet of the three-way valve for water cooling is connected to the water inlet of the water tank. Pressure sensors for water cooling are respectively provided on the pipelines on both sides of the water filter;

[0020] The pressure information on both sides of the water filter is detected by the two pressure sensors for water cooling. When the pressure difference between both sides of the water filter is greater than the preset pressure difference for water cooling, the pipeline between the water outlet of the water tank and the water filter is disconnected through the three-way valve for water cooling and the pipeline between the water outlet of the water tank and the water inlet of the water tank is connected. Otherwise, the pipeline between the water outlet of the water tank and the water inlet of the water tank is disconnected through the three-way valve for water cooling and the pipeline between the water outlet of the water tank and the water filter is connected.

[0021] Optionally, the mesh number of the filter screen of the water filter is 200 mesh to 300 mesh.

[0022] Optionally, a heat exchanger is further provided on the pipeline between the electric controller cooling outlet of the motor controller and the water return port of the water tank.

[0023] Optionally, the lubricating oil cooling circulation system includes:

[0024] A lubricating oil tank, the lubricating oil outlet of the lubricating oil tank is connected to the heat dissipation inlet of the bearing through a pipeline, and the lubricating oil return port of the lubricating oil tank is connected to the heat dissipation outlet of the bearing through at least one heat dissipation system among the fuel-lubricating oil heat exchange system and the air-cooled heat dissipation system through a pipeline.

[0025] Optionally, a lubricating oil filter is provided on the pipeline between the lubricating oil outlet of the lubricating oil tank and the heat dissipation inlet of the bearing, a first three-way valve for lubricating oil cooling is provided between the lubricating oil outlet of the lubricating oil tank and the lubricating oil filter, another outlet of the first three-way valve for lubricating oil cooling is connected to the lubricating oil inlet of the lubricating oil tank, and pressure sensors for lubricating oil cooling are respectively provided on the pipelines on both sides of the lubricating oil filter;

[0026] The pressure information on both sides of the lubricating oil filter is detected by the two pressure sensors for lubricating oil cooling. When the pressure difference between both sides of the lubricating oil filter is greater than the preset pressure difference for lubricating oil cooling, the pipeline between the lubricating oil outlet of the lubricating oil tank and the lubricating oil filter is disconnected through the first three-way valve for lubricating oil cooling and the pipeline between the lubricating oil outlet of the lubricating oil tank and the lubricating oil inlet of the lubricating oil tank is connected, otherwise the pipeline between the lubricating oil outlet of the lubricating oil tank and the lubricating oil inlet of the lubricating oil tank is disconnected through the first three-way valve for lubricating oil cooling and the pipeline between the lubricating oil outlet of the lubricating oil tank and the lubricating oil filter is connected.

[0027] Optionally, the mesh number of the filter screen of the lubricating oil filter is 200 mesh to 300 mesh.

[0028] Optionally, when the pressure difference between both sides of the lubricating oil filter is greater than the preset pressure difference for lubricating oil cooling, an alarm is given.

[0029] Optionally, the temperature of the lubricating oil on the pipeline between the lubricating oil outlet of the lubricating oil tank and the heat dissipation inlet of the bearing is detected. When the temperature is higher than the preset temperature for lubricating oil cooling, the lubricating oil flowing out from the lubricating oil outlet of the lubricating oil tank directly enters the heat dissipation inlet of the bearing to dissipate heat from the bearing. When the temperature is not higher than the preset temperature for lubricating oil cooling, part of the lubricating oil flowing out from the lubricating oil outlet of the lubricating oil tank enters the motor controller to dissipate heat from the motor controller, and then the heated lubricating oil is cooled by at least one heat dissipation system among the fuel-lubricating oil heat exchange system and the air-cooled heat dissipation system and then returns to the lubricating oil tank.

[0030] Optionally, a second three-way valve for oil heat dissipation is provided on the pipeline between the oil outlet of the oil box and the heat dissipation inlet of the bearing, the other outlet of the second three-way valve for oil heat dissipation is connected to the oil heat dissipation inlet of the motor controller, and the oil heat dissipation outlet of the motor controller is connected to the oil return port of the oil box through a pipeline via at least one heat dissipation system of the fuel and oil heat exchange system and the air-cooled heat dissipation system;

[0031] A first temperature sensor for oil cooling is provided on the pipeline between the oil outlet of the oil box and the second three-way valve for oil cooling. When the temperature of the first temperature sensor for oil cooling is higher than the preset temperature for oil cooling, the pipeline between the oil outlet of the oil box and the oil cooling inlet of the motor controller is disconnected by the second three-way valve for oil cooling, and the pipeline between the oil outlet of the oil box and the cooling inlet of the bearing is connected. Otherwise, the pipeline between the oil outlet of the oil box and the cooling inlet of the bearing is disconnected by the second three-way valve for oil cooling, and the pipeline between the oil outlet of the oil box and the cooling inlet of the motor controller is connected within a preset time period. After the preset time period, the pipeline between the oil outlet of the oil box and the oil cooling inlet of the motor controller is disconnected by the second three-way valve for oil cooling, and the pipeline between the oil outlet of the oil box and the cooling inlet of the bearing is connected.

[0032] Optionally, when an oil filter is provided on the pipeline between the oil outlet of the oil box and the heat dissipation inlet of the bearing, the second three-way valve for oil heat dissipation is provided on the pipeline between the oil filter and the heat dissipation inlet of the bearing.

[0033] Optionally, the heat dissipation outlet of the bearing and the lubricating oil heat dissipation outlet of the motor controller are respectively connected to the lubricating oil inlet of the fuel and lubricating oil heat exchange system and the inlet of the air-cooled heat dissipation system through a third three-way valve for lubricating oil heat dissipation, and the lubricating oil return port of the lubricating oil tank is respectively connected to the lubricating oil outlet of the fuel and lubricating oil heat exchange system and the outlet of the air-cooled heat dissipation system through a fourth three-way valve for lubricating oil heat dissipation.

[0034] Optionally, the heat dissipation outlet of the bearing, the lubricating oil heat dissipation outlet of the motor controller and the third three-way valve for lubricating oil heat dissipation are also connected through a fifth three-way valve for lubricating oil heat dissipation, and the fifth three-way valve for lubricating oil heat dissipation is linked to the second three-way valve for lubricating oil heat dissipation.

[0035] Optionally, the fuel system comprises:

[0036] A fuel tank, wherein a fuel outlet of the fuel tank is connected to a fuel inlet of the engine through a pipeline.

[0037] Optionally, a fuel filter is provided on the pipeline between the fuel outlet of the fuel tank and the fuel inlet of the engine. A first three-way valve for the fuel system is provided between the fuel filter and the fuel outlet of the fuel tank. The other outlet of the first three-way valve for the fuel system is connected to the fuel inlet of the fuel tank. Pressure sensors for the fuel system are respectively provided on the pipelines on both sides of the fuel filter;

[0038] The pressure information on both sides of the fuel filter is detected by the two pressure sensors for the fuel system. When the pressure difference on both sides of the fuel filter is greater than the preset pressure difference for the fuel system, the pipeline between the fuel outlet of the fuel tank and the fuel filter is disconnected through the first three-way valve for the fuel system, and the pipeline between the fuel outlet of the fuel tank and the fuel inlet of the fuel tank is connected. Otherwise, the pipeline between the fuel outlet of the fuel tank and the fuel inlet of the fuel tank is disconnected through the first three-way valve for the fuel system, and the pipeline between the fuel outlet of the fuel tank and the fuel filter is connected.

[0039] Optionally, the temperature of the fuel on the pipeline between the fuel outlet of the fuel tank and the fuel inlet of the engine is detected. When the temperature meets the preset combustion temperature, the fuel flowing out of the fuel outlet of the fuel tank is directly supplied to the engine for combustion. When the temperature does not meet the preset combustion temperature, the fuel flowing out of the fuel outlet of the fuel tank cools the lubricating oil through the fuel-lubricating oil heat exchange system to increase the temperature of the fuel, and the heated fuel is supplied to the engine for combustion.

[0040] Optionally, when the temperature does not meet the preset combustion temperature and is lower than the preset temperature for the fuel system, the fuel flowing out of the fuel outlet of the fuel tank exchanges heat with the motor controller, and then cools the lubricating oil through the fuel-lubricating oil heat exchange system to increase the temperature of the fuel. The heated fuel is supplied to the engine for combustion. When the temperature does not meet the preset combustion temperature and is not lower than the preset temperature for the fuel system, the fuel flowing out of the fuel outlet of the fuel tank cools the lubricating oil through the fuel-lubricating oil heat exchange system to increase the temperature of the fuel, and the heated fuel is supplied to the engine for combustion.

[0041] Optionally, a second three-way valve for the fuel system is provided on the pipeline between the fuel outlet of the fuel tank and the fuel inlet of the engine. The other outlet of the second three-way valve for the fuel system is connected to the fuel inlet of the fuel-lubricating oil heat exchange system. The fuel outlet of the fuel-lubricating oil heat exchange system is connected to the fuel inlet of the engine through a pipeline;

[0042] A first temperature sensor for the fuel system is arranged on the pipeline between the fuel outlet of the fuel tank and the second three-way valve for the fuel system. When the temperature of the first temperature sensor for the fuel system does not meet the preset combustion temperature, the pipeline between the fuel outlet of the fuel tank and the fuel inlet of the engine is disconnected by the second three-way valve for the fuel system, and the pipeline between the fuel outlet of the fuel tank and the fuel inlet of the fuel and lubricating oil heat exchange system is connected; otherwise, the pipeline between the fuel outlet of the fuel tank and the fuel inlet of the fuel and lubricating oil heat exchange system is disconnected by the second three-way valve for the fuel system, and the pipeline between the fuel outlet of the fuel tank and the fuel inlet of the fuel and lubricating oil heat exchange system is connected.

[0043] Optionally, a third three-way valve for a fuel system is provided on a pipeline between the fuel outlet of the fuel tank and the second three-way valve for a fuel system, the other outlet of the third three-way valve for a fuel system is connected to a fuel heat dissipation inlet of the motor controller, a fourth three-way valve for a fuel system is provided on a pipeline between the second three-way valve for a fuel system and the fuel inlet of the engine, the other inlet of the fourth three-way valve for a fuel system is respectively connected to a fuel heat dissipation outlet of the motor controller and a fuel outlet of the fuel and lubricating oil heat exchange system, and the fourth three-way valve for a fuel system is respectively linked to the second three-way valve for a fuel system and the third three-way valve for a fuel system;

[0044] When the temperature of the first temperature sensor for the fuel system does not meet the preset combustion temperature and is lower than the preset temperature for the fuel system, the pipeline between the fuel outlet of the fuel tank and the second three-way valve for the fuel system is disconnected by the third three-way valve for the fuel system, and the pipeline between the fuel outlet of the fuel tank and the fuel heat dissipation inlet of the motor controller is connected; the pipeline between the fuel inlet of the engine and the fuel heat dissipation outlet of the motor controller and the fuel outlet of the fuel and lubricating oil heat exchange system is disconnected by the fourth three-way valve for the fuel system, and the pipeline between the second three-way valve for the fuel system and the fuel inlet of the engine is connected;

[0045] When the temperature of the first temperature sensor for the fuel system does not meet the preset combustion temperature and is not lower than the preset temperature for the fuel system, the pipeline between the fuel outlet of the fuel tank and the fuel heat dissipation inlet of the motor controller is disconnected through the third three-way valve for the fuel system, and the pipeline between the fuel outlet of the fuel tank and the second three-way valve for the fuel system is connected. The pipeline between the fuel outlet of the fuel tank and the fourth three-way valve for the fuel system is disconnected through the second three-way valve for the fuel system, and the pipeline between the fuel outlet of the fuel tank and the fuel inlet of the fuel-lubricating oil heat exchange system is connected. The pipeline between the second three-way valve for the fuel system and the fuel inlet of the engine is disconnected through the fourth three-way valve for the fuel system, and the pipeline between the fuel outlet of the fuel-lubricating oil heat exchange system and the fuel inlet of the engine is connected.

[0046] When the temperature of the first temperature sensor for the fuel system meets the preset combustion temperature, the pipeline between the fuel outlet of the fuel tank and the fuel heat dissipation inlet of the motor controller is disconnected through the third three-way valve for the fuel system, and the pipeline between the fuel outlet of the fuel tank and the second three-way valve for the fuel system is connected. The pipeline between the fuel outlet of the fuel tank and the fuel inlet of the fuel-lubricating oil heat exchange system is disconnected through the second three-way valve for the fuel system, and the pipeline between the fuel outlet of the fuel tank and the fourth three-way valve for the fuel system is connected. The pipeline between the fuel heat dissipation outlet of the motor controller, the fuel outlet of the fuel-lubricating oil heat exchange system and the fuel inlet of the engine is disconnected through the fourth three-way valve for the fuel system, and the pipeline between the second three-way valve for the fuel system and the fuel inlet of the engine is connected.

[0047] Optionally, when a fuel filter is provided on the pipeline between the fuel outlet of the fuel tank and the fuel inlet of the engine, the fuel filter is provided on the pipeline between the fuel outlet of the fuel tank and the third three-way valve for the fuel system.

[0048] Optionally, the thermal balance system further includes:

[0049] A monitoring system for monitoring the operation of the thermal balance system. The monitoring system includes at least one of a flow meter, a flow regulating valve, a temperature sensor, a pressure sensor, a flow sensor, a speed sensor, and a metal chip detector provided at each preset position. The sensing information collected by the sensor in real time is compared with a preset range, and an alarm or control is performed when the preset range is exceeded.

[0050] Optionally, the control module further includes an electronic controller and a powertrain controller connected to each other;

[0051] Each sensor in the monitoring system is connected to the electronic controller. The sensing information collected by the sensor in real time is compared with a preset range through the electronic controller. When the preset range is exceeded, the powertrain controller exchanges data with the client through the CAN and RS232 communication buses, and the powertrain controller connects the alarm signal to the client alarm system through the output alarm circuit.

[0052] Optionally, the hybrid power system further includes an electronic controller and a powertrain controller that are connected to each other;

[0053] The monitoring system includes a rotational speed sensor and an exhaust gas temperature sensor. The rotational speed of the engine is measured by the rotational speed sensor and transmitted to the electronic controller, and the exhaust gas temperature of the engine is measured by the exhaust gas temperature sensor and the exhaust gas temperature value is transmitted to the electronic controller. The rotational speed and the exhaust gas temperature value collected in real time are respectively compared with the preset alarm limit value and the parking protection limit value through the electronic controller to judge the operating state of the engine;

[0054] When at least one of the rotational speed and the exhaust gas temperature value exceeds the preset alarm limit value, the powertrain controller transmits the fault status information to the storage display and alarm system of the client and issues an alarm signal;

[0055] When at least one of the rotational speed and the exhaust gas temperature value exceeds the preset parking protection limit value, the powertrain controller issues an alarm signal, and at the same time the electronic controller executes the interlock parking protection control and the engine stops.

[0056] Optionally, the hybrid power system further includes an electronic controller and a powertrain controller that are connected to each other;

[0057] The lubricating oil cooling circulation system includes a lubricating oil tank. The lubricating oil outlet of the lubricating oil tank is connected to the heat dissipation inlet of the engine bearing through a pipeline in sequence via a lubricating oil pump and a lubricating oil filter component;

[0058] The monitoring system includes three lubricating oil pressure sensors, a lubricating oil temperature sensor, and a metal chip detector. The three lubricating oil pressure sensors respectively measure the lubricating oil pressure after the lubricating oil pump, the lubricating oil pressure after the lubricating oil filter component, and the lubricating oil pressure at the inlet of the engine reducer, and transmit the three lubricating oil pressure values to the electronic controller. The lubricating oil temperature sensor measures the lubricating oil temperature in the lubricating oil tank and transmits the lubricating oil temperature value to the electronic controller. The metal chip detector detects metal chips in the return oil of the lubricating oil tank and transmits the detection result to the electronic controller. The detection result is determined by the electronic controller, and the real-time collected lubricating oil pressure value and lubricating oil temperature value are respectively compared with the preset alarm limit values by the electronic controller to realize the state monitoring of the lubricating oil system;

[0059] When at least one of the lubricating oil pressure value and the lubricating oil temperature value exceeds the preset alarm limit value or the detection result is in a conducting state, the powertrain controller transmits the fault status information to the storage display and alarm system of the client to issue an alarm signal.

[0060] Optionally, the hybrid power system further includes an electronic controller and a powertrain controller connected to each other;

[0061] The engine has a main oil circuit and a starting oil circuit. A main fuel pump is arranged on the main oil circuit, and a starting fuel pump is arranged on the starting oil circuit;

[0062] The monitoring system includes a main fuel pressure switch arranged on the main oil circuit and a starting fuel pressure switch arranged on the starting oil circuit. The electronic controller monitors the switch states of the main fuel pressure switch and the starting fuel pressure switch to realize the monitoring of the working conditions of the main fuel pump and the starting fuel pump;

[0063] When the switch state of the main fuel pressure switch or the starting fuel pressure switch is closed, it is considered that the corresponding fuel pump has a fault, and the powertrain controller transmits the fault status information to the storage display and alarm system of the client;

[0064] When only one of the main fuel pump and the starting fuel pump has a fault, the electronic controller switches to the single-pump fuel supply control mode. When both the main fuel pump and the starting fuel pump have faults, the electronic controller executes the interlock parking protection control logic and the engine stops.

[0065] A test method uses the thermal balance system provided by the present invention. The test method includes:

[0066] Design a test platform that meets the simulation requirements. Corresponding sensors are provided at the preset key nodes of each pipeline in the test platform and before and after the pump. The sensors are at least one of a flow meter, a pressure sensor, a temperature sensor, and a flow regulating valve;

[0067] In the initial stage, a primary functional system is used for primary thermal balance testing. The cooling medium output and return containers and pipelines of the test platform are enlarged by several times of the conventional size to ensure sufficient redundancy during the test process, so that flexible adjustment can be carried out. At this time, the motor controller, the electronic controller, and the powertrain controller are all placed separately, and a corresponding cooling scheme is formulated for the motor controller;

[0068] According to the initial test results, determine the parameters that meet the actual working conditions, and select pumps that can achieve the parameters, and conduct another test by adjusting the speeds of the pumps;

[0069] According to the results of the second test, gradually reduce the volume of each controller included in the control module and integrate it into the motor, and use a secondary functional system for secondary thermal balance testing. Reduce the flow of the lubricating oil tank and various heat exchange equipment and integrate them on the top surface of the test bench to create an integrated system. At the same time, continue to adjust the models of the pumps for another test to make it more in line with the structural requirements of the actual product.

[0070] Optionally, in the secondary test, the controller included in the control module is any one or a combination of a motor controller, an electronic controller, a powertrain controller, and a power management controller.

[0071] Optionally, design a test platform that meets the simulation requirements, including:

[0072] For heat generating equipment including an engine, an output motor, and a motor controller, according to the working conditions including the working temperature and working pressure and the structural characteristics of each heat generating equipment, through simulation analysis, different cooling media are selected for simulation testing to determine the cooling medium flow rate, inlet temperature, and outlet temperature required for the heat generating equipment to operate under the specified working conditions;

[0073] According to the preset test scheme of the thermal management system, combined with the parameters including pressure, pressure drop, and the fuel temperature and pressure required for engine combustion in the actual test pipeline network, design a test platform that can meet the simulation requirements.

[0074] Beneficial effects: The present invention has at least one or more of the following advantages:

[0075] 1. The functional system of the present invention includes a water cooling circulation system, a lubricating oil cooling circulation system, a fuel system, a fuel-lubricating oil heat exchange system, and an air-cooling system. The test schemes that can be completed include a controller for a separately water-cooled output motor, separate lubricating oil cooling, separate fuel cooling, the cooperation between lubricating oil and fuel, and the cooperation between lubricating oil and air cooling, etc.

[0076] 2. The heat balance system of the present invention is a scheme of lubricating oil cooling and the cooperation with fuel and air cooling, etc. The system heat balance is carried out based on a high-power motor controller for the output motor. The present invention is applied to a test platform and tested with corresponding test schemes to comprehensively evaluate the heat balance scheme that can be actually applied.

[0077] 3. The heat balance system of the present invention has a powertrain controller, system monitoring, etc. By monitoring and collecting various test pressures, temperatures, and flows, etc., it ensures that the test can be carried out safely and smoothly, and can evaluate whether each test scheme can meet the expectations through the obtained test data.

[0078] 4. The test method of the present invention provides a complete test scheme, from simulation, to test design, to test verification of different scheme combinations, so as to obtain the performance of different schemes and corresponding more suitable usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] Figure 1 is a schematic structural diagram of a test bench of the present invention;

[0080] Figure 2 is Figure 1 another perspective view;

[0081] Figure 3 is Figure 2 a top view of;

[0082] Figure 4 is Figure 2 a side view of;

[0083] Figure 5A is a schematic structural diagram of a connection structure between a connecting frame and an engine of the present invention;

[0084] Figure 5B is Figure 5A a sectional view of;

[0085] Figure 6 is a position relationship diagram between a connecting frame and a main platform of the present invention;

[0086] Figure 7 is a schematic structural diagram of the test bench of the present invention after arranging a functional system, a hybrid power system, and a control module;

[0087] Figure 8 isFigure 7 Top view;

[0088] Figure 9 is Figure 7 Rear schematic view of;

[0089] Figure 10 is Figure 7 Right side view of;

[0090] Figure 11 is Figure 7 Front side view of;

[0091] Figure 12 This is a piping connection diagram between the water cooling circulation system and the motor controller in the thermal balance system of the present invention;

[0092] Figure 13 This is a piping connection diagram between the lubricating oil cooling circulation system, the fuel-oil / lubricating oil heat exchange system of the fuel system, the air-cooling system and the engine in the thermal balance system of the present invention. Detailed implementation manners

[0093] The following will describe in detail the preferred embodiments of the present invention with reference to the accompanying drawings so as to more clearly understand the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not limitations on the scope of the present invention, but only to illustrate the essential spirit of the technical solution of the present invention.

[0094] In the following description, for the purpose of explaining various disclosed embodiments, certain specific details are set forth to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other instances, well-known devices, structures and techniques associated with the present application may not be shown or described in detail so as not to unnecessarily obscure the description of the embodiments.

[0095] References throughout the specification to "one embodiment" or "an embodiment" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of "in one embodiment" or "in an embodiment" throughout the specification are not necessarily all referring to the same embodiment. Additionally, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0096] In the following description, in order to clearly show the structure and working mode of the present invention, many directional terms will be used for description. However, words such as "front", "rear", "left", "right", "outer", "inner", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as limiting terms.

[0097] Refer toFigures 1 to 4 In an embodiment of the present invention, a test bench is provided, which includes a frame 11, casters 12, hoof feet 13, an extension platform 14, and a main platform 15.

[0098] The casters 12 and the hoof feet 13 are respectively arranged at the bottom of the frame 11. The design of the casters 12 and the hoof feet 13 enables the test bench to form a mobile bench, which can change the test site at any time, is more flexible, and can be stably placed.

[0099] The extension platform 14 is arranged around the frame 11, and the extension platform 14 is configured to layout a primary functional system for the primary test thermal balance management system (also known as the thermal balance system). The primary functional system includes at least one of a water cooling circulation system, a lubricating oil cooling circulation system, a fuel system, a fuel-lubricating oil heat exchange system, and an air-cooled heat dissipation system.

[0100] The main platform 15 is arranged on the top of the frame 11, and the main platform 15 is used to layout the hybrid power system and the control module.

[0101] The test bench of the present invention, through the middle frame 11 plus the surrounding extension platforms 14, enables the main platform 15 at the middle top to layout the hybrid power system and the control module, while the surrounding extension platforms 14 can layout various heat dissipation systems for the hybrid power system, so as to meet a variety of thermal balance test schemes and the adjustment of different schemes.

[0102] In an embodiment, the frame 11 is constructed by using square steel or aluminum profiles.

[0103] For example, the frame 11 is constructed by welding 45# square steel.

[0104] Preferably, the surface of the frame 11 is painted.

[0105] In an embodiment, connecting plates 111 are arranged on the side surfaces around the frame 11. The connecting plates 111 are located above the side edges of the extension platform 14, and the connecting plates 111 are used to cooperate with the layout of the pipelines between the primary functional system and the hybrid power system and the control module.

[0106] In an embodiment, the connecting plates 111 are aluminum plates.

[0107] In an embodiment, the casters 12 are heavy-duty casters 12. On the premise of ensuring the supporting weight, it is convenient for the movement of the test bench and increases the flexibility of the site test.

[0108] The type selection of the casters 12 can be selected according to actual needs. The casters 12 are preferably 4-inch casters, and the total height of the casters 12 is preferably 150 mm.

[0109] The caster 12 is detachably connected to the frame 11, and the connecting piece between the caster 12 and the frame 11, namely the T-nut block and the bolt, are used for fixation.

[0110] When the caster 12 is connected to the frame 1, the connection method can be: directly drill 4 connection holes with a diameter of, for example, 7 mm on the frame 11 such as square steel, and screw the caster 12 into the connection holes.

[0111] In one embodiment, the hoof 13 is a heavy-duty hoof 13. On the premise of ensuring the supporting weight, it is convenient for the movement of the test bench and increases the flexibility of the on-site test.

[0112] In one embodiment, the hoof 13 is a rotatable hoof 13.

[0113] After the test platform is moved to the plane through the caster 12, the hoof 13 can be rotated to abut against the plane. When the test platform needs to be moved, the hoof 13 can be rotated in the reverse direction to lift the hoof 13 away from the plane.

[0114] Generally, the bottom of the hoof 13 has a plastic nylon part, and when the hoof 13 abuts against the plane, the frictional force generated by the plastic nylon part and the plane provides the grip.

[0115] Of course, if the lateral thrust of the test platform is relatively large, other fixing objects can be bound to increase the lateral tension.

[0116] In one embodiment, the main platform 15 is composed of a square steel or aluminum profile frame.

[0117] For example, the main platform 15 is composed of 80 mm square steel.

[0118] In one embodiment, the main platform 15 is a cast iron platform.

[0119] In one embodiment, one or several mutually parallel connecting grooves 151 are arranged on the main platform 15.

[0120] Taking the exhaust port of the engine as the front end as a reference, the length direction of the connecting groove 151 is preferably the front-back direction, and several connecting grooves 151 are arranged side by side in the left-right direction on the top surface of the main platform 15.

[0121] The connecting groove 151 on the main platform 15 can adopt a standard groove in the prior art, such as an inverted T-shaped standard groove.

[0122] When several connecting grooves 151 are arranged on the main platform 15, the center distance between the adjacent two connecting grooves 151 is preferably 63 mm.

[0123] In one embodiment, the overall length and width of the test bench are 1200 mm * 1000 mm, and the overall height of the test bench is 1200 mm.

[0124] Given different types of hybrid power systems and to achieve the versatility of the test bench, the size of the test bench can adapt to a certain range of changes. For example, the adaptable sizes are as follows:

[0125] 1. Dimensions of the hybrid power system assembly: 768 * 318 * 345;

[0126] 2. Dimensions of the hybrid power system assembly: 886 * 302 * 360;

[0127] Combining the two sizes, ensure that the size of the test bench can accommodate the two types of engine assemblies, controllers, and their fuel and lubricating oil accessories. The test bench adopts the specifications of this embodiment.

[0128] In one embodiment, the length and width directions of the main platform 15 are flush with the length and width directions of the frame 11.

[0129] When the overall length and width of the test bench are 1200mm * 1000mm, the overall length, width, and height of the main platform 15 are 1200mm * 1000mm * 200mm.

[0130] In one embodiment, the load-bearing capacity of the main platform 15 per square centimeter is not less than 2T.

[0131] Preferably, the main platform 15 is a cast iron platform with a weight of about 1400kg and a load-bearing capacity of 2T (tons) per square centimeter.

[0132] In one embodiment, referring to Figures 5A to 6 , the test bench further includes a connecting frame 16. The connecting frame 16 is used to support and fix the hybrid power system, and the connecting frame 16 is detachably connected to the main platform 15. Preferably, the connecting frame 16 is used to mount the engine on the main platform 15. The connection between the connecting frame 16 and the engine also adopts a detachable connection method.

[0133] In one embodiment, the connecting frame 16 includes a bottom plate 161 and two main brackets 162. The bottom plate 161 is detachably connected to the main platform 15. The two main brackets 162 are symmetrically connected to the bottom plate 161 through fasteners respectively, and the main brackets 162 are connected to the engine of the hybrid power system through fasteners.

[0134] During specific implementation, the main bracket 162 and the bottom plate 161 can be connected by a plurality of M12 * 60 bolts.

[0135] During specific implementation, the main bracket 162 and the engine can be connected by a plurality of M10 * 55 bolts. As Figure 5B shown, the engine 21 is locked on the left and right main brackets 162 by 4 M10 * 55 socket head cap screws on the left and right sides.

[0136] In one embodiment, a preset distance is provided between two main brackets 162.

[0137] In one embodiment, the connecting frame 16 further includes a reinforcing plate 163, and two ends of the reinforcing plate 163 are respectively connected to the two main brackets 162.

[0138] In one embodiment, the connecting frame 16 further includes at least two reinforcing ribs 164. At least one reinforcing rib 164 is respectively connected to the bottom plate 161 and one main bracket 162, and at least another reinforcing rib 164 is respectively connected to the bottom plate 161 and the other main bracket 162 to form a triangular stable structure.

[0139] When the reinforcing rib 164 is connected to the bottom plate 161, welding connection is preferably adopted. When the reinforcing rib 164 is connected to the main bracket 162, welding connection is preferably adopted.

[0140] The reinforcing rib 164 preferably adopts an L-shaped structure with a horizontal section and a vertical section. The horizontal section of the reinforcing rib 164 is connected to the bottom plate 161, and the vertical section of the reinforcing rib 164 is connected to the main bracket 162.

[0141] In one embodiment, the top surface of the main bracket 162 is an arc surface for fitting with the outer peripheral surface of the engine 21.

[0142] In one embodiment, when a connection groove 151 is provided on the main platform 15 and the connection groove 151 is an inverted T-shaped groove, refer to Figure 6 , the bottom plate 161 is fixedly connected to the main platform 15 through bolts 1611 and T-shaped nuts 1612, and the T-shaped nuts 1612 are inverted in the connection groove 151.

[0143] In this embodiment, the engine 21 is installed on the main platform 15 through the bottom plate 161. As long as the bottom plate 161 can be adjusted to place engines 21 with different air intake and exhaust direction arrangements, engines 21 with different air intake and exhaust direction arrangements can be arranged on the top of the test bench. For example, one is that the side of the engine intakes air and the front discharges high-temperature hot air; the other is that the front of the engine intakes air and the side discharges high-temperature hot air. A discharge port for docking with the exhaust port of the engine is reserved in the detection room for testing. In this way, by adjusting the bottom plate 161, different engines can be arranged, and the exhaust ports of different types of engines can be docked with the discharge port, so that the test bench remains unchanged, further improving the flexibility of the test bench.

[0144] The hybrid system includes an engine 21 and an output motor 22 that drives the engine 21 to output electric power; the control module includes a motor controller 23 for the output motor 22, an electronic controller (ECU, also known as a start controller) for the engine 21, and a powertrain controller (SRCU). Among them, in one embodiment, the position where the exhaust port of the engine 21 is located is the front side. Among them, the main heat-generating devices are the bearings of the engine, the bearings of the output motor, and the motor controller 23.

[0145] In one embodiment, referring to Figures 7 to 11 , the primary functional system includes a water cooling circulation system 30, a lubricating oil cooling circulation system 40, a fuel system 50, a fuel-lubricating oil heat exchange system 60, and an air-cooling system 70.

[0146] The motor controller in the hybrid system and the control module can be organically connected to the above-mentioned systems through various pipelines, so as to cool the bearings of the engine, the bearings of the output motor, and the motor controller in the hybrid system, and can supply fuel to the engine for ignition.

[0147] For the medium output, return, and pipeline connection methods between the above-mentioned systems, the existing technologies can be directly adopted. In this embodiment, the above-mentioned systems are organically arranged:

[0148] The water cooling circulation system 30 is located on the front extension platform 14, the lubricating oil cooling circulation system 40 is located on the left extension platform 14, the fuel system 50 is located on the right extension platform 14, and the fuel-lubricating oil heat exchange system 60 and the air-cooling system 70 are located on the rear extension platform 14.

[0149] In one embodiment, the main platform 15 is also used to layout the secondary functional system for subsequent testing. At this time, the volume of each controller included in the control module is relatively reduced compared to the primary functional system and integrated into the control module of the motor. By switching the pipelines, the hybrid system and the control module with reduced volume can be switched from connecting to the primary functional system to connecting to the secondary functional system.

[0150] The integration method and integration structure of each controller in this embodiment can adopt the existing technologies, such as the technical content disclosed in Patent CN119253917A, which will not be elaborated here.

[0151] By integrating the secondary functional system for subsequent testing on the main platform 15 and through the pipeline switching, the test can be switched from the primary system solution to the secondary system solution.

[0152] In one embodiment, the secondary functional system includes some or all of the functional components scaled down by several times relative to the primary functional system. The specific functional components included in the secondary system are determined according to the solution selected in the primary test. Additionally, "scaled down by several times" in this text mainly refers to the reduction in the volume of the medium that can be accommodated or the flow rate of the medium provided. For example, the volume of the lubricating oil tank in the primary functional system is 30L, while in the secondary functional system, it is 18L. Another example is that the heat exchange / dissipation component is replaced with a small-volume component with microchannels. Although the volume or flow rate of the medium is reduced, the heat exchange efficiency is higher, which is convenient for integration. Accordingly, other components, such as pumps, are changed accordingly. According to the redundancy test of the primary functional system, the secondary functional system is scaled down, so that the secondary functional system can be integrated onto the main platform 15, closer to the actual product.

[0153] That is to say, the secondary functional system can include some of the necessary functional components in the primary functional system, or can adopt all the functional components after the high integration of the primary functional system. For example, the lubricating oil tank and various heat exchange devices (such as the fuel-lubricating oil heat exchange system 60 and the air-cooled heat dissipation system 70) in the lubricating oil heat dissipation circulation system 40 are integrated onto the main platform 15, so as to create a more miniaturized and highly integrated system closer to the actual product.

[0154] In one embodiment, the controller included in the control module corresponding to the secondary functional system is any one or a combination of a motor controller, an electronic controller, a powertrain controller, and a power management controller.

[0155] The embodiment of the present invention also provides a thermal balance management test system, including:

[0156] The primary functional system, the hybrid power system, and the control module arranged on the test bench provided in the above embodiments of the present invention, wherein,

[0157] The primary functional system is used for the primary test of the thermal balance management system test and is arranged on the extended platform of the test bench;

[0158] The hybrid power system includes an engine and an output motor that drives and outputs electric energy through the engine. The control module includes the motor controller of the output motor. The hybrid power and the motor controller are arranged on the main platform of the test bench.

[0159] In one embodiment, the thermal balance management test system further includes a secondary functional system for subsequent tests of thermal balance management. The secondary functional system includes some or all of the functional components scaled down by several times relative to the primary functional system, and the secondary functional system is integrated around the hybrid power system.

[0160] In one embodiment, the secondary function system includes any one or more of a lubricating oil heat dissipation circulation system, a fuel system, a water heat dissipation circulation system, a fuel-lubricating oil heat exchange system, and an air-cooled heat dissipation system that are several times smaller than the primary function system. At this time, the volume of each controller included in the control module corresponding to the secondary function system is reduced relative to the primary function system and integrated into the output motor.

[0161] The integration method and integration structure of each controller in this embodiment can adopt the existing technology, such as the technical content disclosed in Patent CN119253917A, which will not be elaborated here.

[0162] Refer to Figures 7 to 13 , an embodiment of the present invention further provides a thermal balance system, which is preferably installed on the test bench provided in each of the above embodiments of the present invention. Of course, this thermal balance system can also be installed on other existing test benches.

[0163] This thermal balance system includes a hybrid power system, a control module, and a function system. The hybrid power system includes an engine 21 and an output motor 22 that drives the output of electric power by the engine 21. The control module includes a motor controller 23 of the output motor 22. The function system includes a water heat dissipation circulation system 30, a lubricating oil heat dissipation circulation system 40, a fuel system 50, a fuel-lubricating oil heat exchange system 60, and an air-cooled heat dissipation system 70.

[0164] At least one or a combination of the lubricating oil heat dissipation circulation system 40, the fuel system 50, the water heat dissipation circulation system 30, the fuel-lubricating oil heat exchange system 60, and the air-cooled heat dissipation system 70 is used to dissipate heat from any one or more of the bearings of the engine 21, the bearings of the output motor 22, and the motor controller 23. That is to say, heat can be dissipated from the bearings of the engine 21 and / or the bearings of the output motor 22 and / or the motor controller 23 through a combination of lubricating oil cooling and other heat dissipation combinations such as fuel and air cooling.

[0165] The fuel system 50 is also used for the combustion of the engine 21.

[0166] In one embodiment, the control module is located on the side of the hybrid power system, and the function system is a primary function system for primary function testing, and the primary function system is located around the hybrid power system and the control module.

[0167] When the thermal balance system is installed on the test bench provided in each of the above embodiments of the present invention, the hybrid power system and the control module are installed on the main platform 15, and the engine 21 of the hybrid power system can be installed on the main platform 15 through the connecting frame 16. The function system is installed on the extension platform 14.

[0168] In one embodiment, the exhaust port of the engine 21 is located at the front side. The water cooling circulation system 30 is located at the front side of the engine 21, the lubricating oil cooling circulation system 40 is located at the left side of the engine 21, the fuel system 50 is located at the right side of the engine 21, and the fuel-lubricating oil heat exchange system 60 and the air-cooling system 70 are located at the rear side of the engine 21.

[0169] In this embodiment, the water cooling circulation system 30 is placed at the front side of the engine 21 because if the fuel system 50 is placed at the front side, and the flame of the engine 21 is also at the front side, and the flame temperature is close to the fuel ignition temperature, there are potential safety hazards. Placing the water cooling circulation system 30 at the front side of the engine 21 does not pose safety problems. The lubricating oil cooling circulation system 40 is placed at the left side of the engine 21, which is closest to the interface of the inlet motor, reducing the pipeline layout. The fuel system 50 is placed at the right side of the engine 21, which is closest to the fuel inlet interface of the engine, reducing the pipeline layout. In the primary system, the fuel-lubricating oil heat exchange system 60 and the air-cooling system 70 adopted are simple heat exchange components with lower costs. In order to ensure the heat exchange quantity, these two are placed at the back, which can increase the pipeline process and enhance the cooling effect.

[0170] The engine 21 is a turbine engine, which is coaxially connected with the output motor 22. That is to say, the power turbine of the engine 21 and the output motor 22 share a common shaft.

[0171] In the present invention, two types of engines can be adapted. One is side air intake and front exhaust of high-temperature hot air, and the other is front air intake and side exhaust of high-temperature hot air. As Figures 7 to 11 shown, the engine 21 has a structure of side air intake and front (i.e., front side) exhaust.

[0172] During specific implementation, a discharge port for docking with the exhaust port of the engine is reserved in the test chamber. Since the high-temperature exhaust of the engine is discharged from the front or the side, in order to be able to dock with the reserved discharge port, it can be achieved by adjusting the direction of the engine. In this way, without changing the test bench, the connection between the engine system and each pipeline system can be changed by changing the connection joints or pipelines.

[0173] When the engine 21 is fixed by the bottom plate 161 of the present invention, no matter how the bottom plate 161 is rotated, the bottom plate 161 can be installed on the connection groove 151 of the main platform 15, and then by modifying the connection pipelines between the water circuit, lubricating oil, fuel, output motor, motor controller, etc. and the engine, it can be made universal.

[0174] There is a certain distance between the discharge port and the exhaust port to allow external air to enter and mix with the hot air discharged from the exhaust port, reducing the discharge temperature of the hot air. Preferably, a flared mouth is installed on the exhaust port of the engine. More preferably, an exhaust fan is installed on the flared mouth to extract air. During exhaust, it is preferably exhausted through a pipeline and a silencing tower.

[0175] In addition, in order to accommodate the adjustment of multiple pipelines, pipelines with sufficient flow can be reserved. For example, the lubricating oil flow is reserved enough to supply the usage flow of one or two lubricating oil circuits.

[0176] In one embodiment, the thermal balance system further includes a secondary functional system for subsequent testing. The secondary functional system includes some or all of the functional components of the primary functional system scaled down by several times. The secondary functional system and the control module are respectively integrated around the hybrid power system.

[0177] When the thermal balance system is installed on the test bench provided in the above embodiments of the present invention, the hybrid power system and the control module are installed on the main platform 15. The engine 21 of the hybrid power system can be installed on the main platform 15 through the connecting frame 16. The secondary functional system is also installed on the main platform 15, thus creating a more miniaturized and highly integrated system.

[0178] In one embodiment, the secondary functional system includes any one or more of a lubricating oil heat dissipation circulation system, a fuel system, a water heat dissipation circulation system, a fuel-lubricating oil heat exchange system, and an air-cooled heat dissipation system that are scaled down by several times relative to the primary functional system. At this time, the volume of each controller included in the control module corresponding to the secondary functional system is scaled down relative to the primary functional system and integrated into the output motor.

[0179] The integration method and integration structure of each controller in this embodiment can adopt the prior art, such as the technical content disclosed in Patent CN119253917A, which will not be elaborated here.

[0180] In one embodiment, referring to Figure 12 , since the motor controller 23 is usually a high-power device and needs to be cooled during operation to enable it to work stably, the water heat dissipation circulation system 30 is used to dissipate heat from the motor controller 23. The water heat dissipation circulation system 30 includes a water tank 31. The water outlet of the water tank 31 is connected to the electric controller heat dissipation inlet of the motor controller 23 through a pipeline, and the electric controller heat dissipation outlet of the motor controller 23 is connected to the water return port of the water tank 31 through a pipeline.

[0181] In one embodiment, referring to Figure 12 , the water heat dissipation circulation system 30 further includes a water filter 32 and a three-way valve 33 for water heat dissipation.

[0182] The water filter 32 is arranged on the pipeline between the water outlet of the water tank 31 and the electric controller heat dissipation inlet of the motor controller 23. A pressure sensor 34 for water heat dissipation and a pressure sensor 35 for water heat dissipation are respectively arranged on the pipelines on both sides of the water filter 32.

[0183] The inlet of the three-way valve 33 for water cooling is connected to the outlet of the water tank 31 through a pipeline. One outlet of the three-way valve 33 for water cooling is connected to the inlet of the water filter 32 through a pipeline. The other outlet of the three-way valve 33 for water cooling is connected to the inlet of the water tank 31 through a pipeline.

[0184] The pressure information on both sides of the water filter 32 is detected by the pressure sensor 34 for water cooling and the pressure sensor 35 for water cooling. When the pressure difference on both sides of the water filter 32 is greater than the preset pressure difference for water cooling, the pipeline between the outlet of the water tank 31 and the water filter 32 is disconnected through the three-way valve 33 for water cooling, and the pipeline between the outlet of the water tank 31 and the inlet of the water tank 31 is connected. When the pressure difference on both sides of the water filter 32 is not greater than the preset pressure difference for water cooling, the pipeline between the outlet of the water tank 31 and the inlet of the water tank 31 is disconnected through the three-way valve 33 for water cooling, and the pipeline between the outlet of the water tank 31 and the water filter 32 is connected.

[0185] In this embodiment, when the pressure difference of the water filter 32 is abnormal, the pipeline between the outlet of the water tank 31 and the inlet of the water tank 31 is opened through the three-way valve 33 for water cooling, and the water flowing out of the outlet of the water tank 31 returns to the water tank 31 through the inlet of the water tank 31. When the pressure difference on both sides of the water filter 32 is normal, the water flowing out of the outlet of the water tank 31 continues to flow downward, and thus enters the electric controller cooling inlet of the motor controller 23 to cool the motor controller 23 by water cooling.

[0186] In one embodiment, the mesh number of the filter screen of the water filter 32 is 200 mesh to 300 mesh.

[0187] In one embodiment, referring to Figure 12 , the water cooling circulation system 30 further includes a heat exchanger 36, and the heat exchanger 36 is arranged on the pipeline between the electric controller cooling outlet of the motor controller 23 and the return water inlet of the water tank 31. The water flowing out of the electric controller cooling outlet of the motor controller 23 is heat-exchanged through the heat exchanger 36 so that the water returns to the water tank 31 after being reduced to a certain temperature.

[0188] In one embodiment, referring to Figure 12 , both the outlet of the water tank 31 and the inlet of the water tank 31 are arranged at the top of the water tank 31, and the return water inlet of the water tank 31 is arranged at the bottom of the side wall of the water tank 31.

[0189] In one embodiment, referring to Figure 12 , the cooling circulation system 30 further includes at least one of a liquid level gauge 37, an exhaust pipe 38 and a drain valve 39.

[0190] The water level in the water tank 31 is monitored by the liquid level gauge 37. The water tank 31 is exhausted through the exhaust pipe 38. The water tank 31 is drained through the drain valve 39. Therefore, the drain valve 39 is preferably arranged at the lower part or the bottom of the water tank 31.

[0191] In one embodiment, on the closed-loop path between the water outlet of the water tank 31 and the electrical controller heat dissipation inlet of the motor controller 23, and between the electrical controller heat dissipation outlet of the motor controller 23 and the water return port of the water tank 31, one or more temperature sensors, one or more pressure sensors, and one or more water flow meters can be set according to actual requirements to monitor the temperature, pressure, or flow rate at each preset monitoring point on the closed-loop path.

[0192] In one embodiment, referring to Figure 13 , the lubricating oil heat dissipation circulation system 40 includes a lubricating oil tank 41. After the lubricating oil outlet of the lubricating oil tank 41 enters the hybrid power system through a pipeline, it is connected to the heat dissipation inlets of the bearings 211 of the engine 21 and the bearings of the output motor 22 through two pipelines respectively. After being dissipated respectively, the lubricating oil passes through an oil port, that is, the common heat dissipation outlet of the bearings 211 of the engine 21 and the bearings of the output motor 22, and is connected to the lubricating oil return port of the lubricating oil tank 41 through a pipeline via at least one of the heat dissipation systems of the fuel-lubricating oil heat exchange system 60 and the air-cooled heat dissipation system 70.

[0193] In this embodiment, the lubricating oil flowing out of the heat dissipation outlet does not directly enter the lubricating oil return port of the lubricating oil tank 41, but is cooled by fuel-lubricating oil or air-cooled heat exchange to cool the lubricating oil to an appropriate temperature and then return to the lubricating oil tank 41.

[0194] In one embodiment, referring to Figure 13 , the lubricating oil heat dissipation circulation system 40 further includes a lubricating oil filter 42 and a first three-way valve 43 for lubricating oil heat dissipation.

[0195] The lubricating oil filter 42 is arranged on the pipeline between the lubricating oil outlet of the lubricating oil tank 41 and the heat dissipation inlets of the bearings 211 and the bearings of the output motor 22. That is to say, the lubricating oil filter 42 is arranged on the pipeline between the lubricating oil outlet of the lubricating oil tank 41 and the hybrid power system. Pressure sensors 44 for lubricating oil heat dissipation and pressure sensors 45 for lubricating oil heat dissipation are respectively arranged on the pipelines on both sides of the lubricating oil filter 42.

[0196] The inlet of the first three-way valve 43 for lubricating oil heat dissipation is connected to the lubricating oil outlet of the lubricating oil tank 41 through a pipeline. One outlet of the first three-way valve 43 for lubricating oil heat dissipation is connected to the lubricating oil filter 42 through a pipeline, and the other outlet of the first three-way valve 43 for lubricating oil heat dissipation is connected to the lubricating oil inlet of the lubricating oil tank 41 through a pipeline.

[0197] The pressure information on both sides of the lubricating oil filter 42 is detected by the pressure sensor 44 for lubricating oil cooling and the pressure sensor 45 for lubricating oil cooling. When the pressure difference across the lubricating oil filter 42 is greater than the preset pressure difference for lubricating oil cooling, the pipeline between the lubricating oil outlet of the lubricating oil tank 41 and the lubricating oil filter 42 is disconnected through the first three-way valve 43 for lubricating oil cooling, and the pipeline between the lubricating oil outlet of the lubricating oil tank 41 and the lubricating oil inlet of the lubricating oil tank 41 is connected. When the pressure difference across the lubricating oil filter 42 is not greater than the preset pressure difference for lubricating oil cooling, the pipeline between the lubricating oil outlet of the lubricating oil tank 41 and the lubricating oil inlet of the lubricating oil tank 41 is disconnected through the first three-way valve 43 for lubricating oil cooling, and the pipeline between the lubricating oil outlet of the lubricating oil tank 41 and the lubricating oil filter 42 is connected.

[0198] In this embodiment, when the pressure difference of the lubricating oil filter 42 is abnormal, the pipeline between the lubricating oil outlet of the lubricating oil tank 41 and the lubricating oil inlet of the lubricating oil tank 41 is opened through the first three-way valve 43 for lubricating oil cooling, and the lubricating oil flowing out of the lubricating oil outlet of the lubricating oil tank 41 returns to the lubricating oil tank 41 through the lubricating oil inlet of the lubricating oil tank 41. When the pressure difference across the lubricating oil filter 42 is normal, the lubricating oil flowing out of the lubricating oil outlet of the lubricating oil tank 41 continues to flow downward, thus entering the heat dissipation inlet of the bearing 211 to cool the bearing 211 of the engine with lubricating oil.

[0199] In one embodiment, the mesh number of the filter screen of the lubricating oil filter 42 is 200 mesh to 300 mesh.

[0200] In one embodiment, when the pressure difference across the lubricating oil filter 42 is greater than the preset pressure difference for lubricating oil cooling, an alarm is given.

[0201] In one embodiment, the temperature of the lubricating oil in the pipeline between the lubricating oil outlet of the lubricating oil tank 41 and the heat dissipation inlet of the bearing 211 is detected. When the temperature is higher than the preset temperature for lubricating oil cooling, the lubricating oil flowing out of the lubricating oil outlet of the lubricating oil tank 41 directly enters the heat dissipation inlet of the bearing 211 to dissipate heat from the bearing 211. When the temperature is not higher than the preset temperature for lubricating oil cooling, part of the lubricating oil flowing out of the lubricating oil outlet of the lubricating oil tank 41 enters the motor controller 23 to dissipate heat from the motor controller 23, and then the heated lubricating oil is cooled by at least one of the heat dissipation systems such as the fuel-lubricating oil heat exchange system 60 and the air-cooled heat dissipation system 70 and then returns to the lubricating oil tank 41.

[0202] The preset temperature for lubricating oil cooling in this embodiment is a pre-set temperature, such as 30 degrees. Of course, it can also be adjusted according to the actual implementation scenario.

[0203] In this embodiment, by comparing the lubricating oil temperature with the preset temperature for lubricating oil cooling, it is determined whether the lubricating oil flows to the bearing 211 for heat dissipation or to the motor controller 23 for heat dissipation.

[0204] A preferred scheme for pipeline connection to implement this embodiment is as follows:

[0205] Referring to Figure 13 , the lubricating oil cooling circulation system 40 further includes a second three-way valve 46 for lubricating oil cooling. The inlet of the second three-way valve 46 for lubricating oil cooling is connected to the lubricating oil outlet of the lubricating oil tank 41 through a pipeline. One outlet of the second three-way valve 46 for lubricating oil cooling is connected to the cooling inlet of the bearing 211 through a pipeline. The other outlet of the second three-way valve 46 for lubricating oil cooling is connected to the lubricating oil cooling inlet of the motor controller 23 through a pipeline. The lubricating oil cooling outlet of the motor controller 23 is connected to the lubricating oil return port of the lubricating oil tank 41 through a pipeline via at least one of the fuel-lubricating oil heat exchange system 60 and the air-cooling system 70.

[0206] A first temperature sensor for lubricating oil cooling is provided on the pipeline between the lubricating oil outlet of the lubricating oil tank 41 and the second three-way valve 46 for lubricating oil cooling. When the temperature monitored by the first temperature sensor for lubricating oil cooling is higher than the preset temperature for lubricating oil cooling, the pipeline between the lubricating oil outlet of the lubricating oil tank 41 and the lubricating oil cooling inlet of the motor controller 23 is disconnected through the second three-way valve 46 for lubricating oil cooling, and the pipeline between the lubricating oil outlet of the lubricating oil tank 41 and the cooling inlet of the bearing 211 is connected. When the temperature of the first temperature sensor for lubricating oil cooling is not higher than the preset temperature for lubricating oil cooling, the pipeline between the lubricating oil outlet of the lubricating oil tank 41 and the cooling inlet of the bearing 211 is disconnected through the second three-way valve 46 for lubricating oil cooling within a preset time period, and the pipeline between the lubricating oil outlet of the lubricating oil tank 41 and the lubricating oil cooling inlet of the motor controller 23 is connected, and then the pipeline between the lubricating oil outlet of the lubricating oil tank 41 and the lubricating oil cooling inlet of the motor controller 23 is disconnected through the second three-way valve 46 for lubricating oil cooling after the preset time period, and the pipeline between the lubricating oil outlet of the lubricating oil tank 41 and the cooling inlet of the bearing 211 is connected.

[0207] In this embodiment, the temperature monitored in real time by the first temperature sensor for lubricating oil cooling is compared with the preset temperature for lubricating oil cooling. Only when the temperature is not higher than the preset temperature for lubricating oil cooling, a part of the lubricating oil can enter the motor controller 23 to cool the motor controller 23. The lubricating oil heated up after cooling the motor controller 23 also returns to the lubricating oil tank 41 through the pipeline after being cooled by air cooling or fuel-lubricating oil heat exchange.

[0208] In one embodiment, when a lubricating oil filter 42 is provided on the pipeline between the lubricating oil outlet of the lubricating oil tank 41 and the cooling inlet of the bearing 211, the second three-way valve 46 for lubricating oil cooling is provided on the pipeline between the lubricating oil filter 42 and the cooling inlet of the bearing 211. That is to say, the inlet of the second three-way valve 46 for lubricating oil cooling is connected to the outlet of the lubricating oil filter 42 through a pipeline.

[0209] In one embodiment, referring to Figure 13, the lubricating oil cooling circulation system 40 further includes a third three-way valve 47 for lubricating oil cooling and a fourth three-way valve 48 for lubricating oil cooling.

[0210] The inlet of the third three-way valve 47 for lubricating oil cooling is respectively connected to the heat dissipation outlet of the bearing 211 and the lubricating oil heat dissipation outlet of the motor controller 23 through pipelines. One outlet of the third three-way valve 47 for lubricating oil cooling is connected to the lubricating oil inlet of the fuel-lubricating oil heat exchange system 60 through a pipeline, and the other outlet of the third three-way valve 47 for lubricating oil cooling is connected to the inlet of the air-cooling heat dissipation system 70 through a pipeline.

[0211] One inlet of the fourth three-way valve 48 for lubricating oil cooling is connected to the lubricating oil outlet of the fuel-lubricating oil heat exchange system 60 through a pipeline, the other inlet of the fourth three-way valve 48 for lubricating oil cooling is connected to the outlet of the air-cooling heat dissipation system 70 through a pipeline, and the outlet of the fourth three-way valve 48 for lubricating oil cooling is connected to the lubricating oil return port of the lubricating oil tank 41 through a pipeline.

[0212] In this embodiment, through the design of the third three-way valve 47 for lubricating oil cooling and the fourth three-way valve 48 for lubricating oil cooling, the lubricating oil flowing out from the heat dissipation outlet of the bearing 211 or the lubricating oil heat dissipation outlet of the motor controller 23 can be cooled by air cooling or fuel-lubricating oil cooling and then flow back to the lubricating oil tank 41.

[0213] In one embodiment, referring to Figure 13 , the lubricating oil cooling circulation system 40 further includes a fifth three-way valve 49 for lubricating oil cooling. One inlet of the fifth three-way valve 49 for lubricating oil cooling is connected to the heat dissipation outlet of the bearing 211 through a pipeline, the other inlet of the fifth three-way valve 49 for lubricating oil cooling is connected to the lubricating oil heat dissipation outlet of the motor controller 23 through a pipeline, the outlet of the fifth three-way valve 49 for lubricating oil cooling is connected to the third three-way valve 47 for lubricating oil cooling through a pipeline, and the fifth three-way valve 49 for lubricating oil cooling is linked with the second three-way valve 46 for lubricating oil cooling.

[0214] That is to say, when the second three-way valve 46 for lubricating oil cooling connects the lubricating oil flowing out from the lubricating oil outlet of the lubricating oil tank 41 to the heat dissipation inlet of the bearing 211, the fifth three-way valve 49 for lubricating oil cooling connects the lubricating oil flowing out from the heat dissipation outlet of the bearing 211 to the third three-way valve 47 for lubricating oil cooling for air cooling or fuel-lubricating oil cooling and then back to the lubricating oil tank 41. When the second three-way valve 46 for lubricating oil cooling connects the lubricating oil flowing out from the lubricating oil outlet of the lubricating oil tank 41 to the lubricating oil heat dissipation inlet of the motor controller 23, the fifth three-way valve 49 for lubricating oil cooling connects the lubricating oil flowing out from the lubricating oil heat dissipation outlet of the motor controller 23 to the third three-way valve 47 for lubricating oil cooling for air cooling or fuel-lubricating oil cooling and then back to the lubricating oil tank 41.

[0215] In one embodiment, one or more temperature sensors, one or more pressure sensors, one or more lubricating oil flow meters, one or more metal detectors, etc. can be set on the entire system pipeline of the lubricating oil heat dissipation circulation system 40 according to actual requirements, so as to monitor the temperature, pressure, flow rate or metal chip content at each preset monitoring point on the system pipeline.

[0216] In one embodiment, referring to Figure 13 , the lubricating oil heat dissipation circulation system 40 further includes at least one of a liquid level gauge 413, an exhaust pipe 414, and an oil drain valve 415.

[0217] The liquid level of the lubricating oil in the lubricating oil tank 41 is monitored by the liquid level gauge 412. The lubricating oil tank 41 is exhausted through the exhaust pipe 414. The lubricating oil in the lubricating oil tank 41 is drained through the oil drain valve 415. Therefore, the oil drain valve 415 is preferably arranged at the lower part or the bottom of the lubricating oil tank 41.

[0218] In one embodiment, referring to Figure 13 , a pipe joint 416 with a filter screen is arranged at the lubricating oil outlet of the lubricating oil tank 41 to facilitate pre-filtering of the outflowing lubricating oil.

[0219] In one embodiment, referring to Figure 13 , a static pressure oil-gas separator 417 is arranged at the lubricating oil return port of the lubricating oil tank 41, and the static pressure oil-gas separator 417 is arranged inside the lubricating oil tank 41.

[0220] In one embodiment, the lubricating oil tank 41 is a lubricating oil tank with a capacity of 60L.

[0221] In one embodiment, referring to Figure 13 , the fuel system 50 includes a fuel tank 51, and the fuel outlet of the fuel tank 51 is connected to the fuel inlet of the engine 21 through a pipeline.

[0222] In one embodiment, referring to Figure 13 , the fuel system 50 further includes a fuel filter 52 and a first three-way valve 53 for the fuel system.

[0223] The fuel filter 52 is arranged on the pipeline between the fuel outlet of the fuel tank 51 and the fuel inlet of the engine 21, and pressure sensors 54 for the fuel system and pressure sensors 55 for the fuel system are respectively arranged on the pipelines on both sides of the fuel filter 52.

[0224] The inlet of the first three-way valve 53 for the fuel system is connected to the fuel outlet of the fuel tank 51 through a pipeline, one outlet of the first three-way valve 53 for the fuel system is connected to the said fuel filter 52 through a pipeline, and the other outlet of the first three-way valve 53 for the fuel system is connected to the fuel inlet of the fuel tank 51 through a pipeline.

[0225] The pressure information on both sides of the fuel filter 52 is detected by the pressure sensor 54 for the fuel system and the pressure sensor 55 for the fuel system. When the pressure difference across the fuel filter 52 is greater than the preset pressure difference for the fuel system, the pipeline between the fuel outlet of the fuel tank 51 and the fuel filter 52 is disconnected through the first three-way valve 53 for the fuel system, and the pipeline between the fuel outlet of the fuel tank 51 and the fuel inlet of the fuel tank 51 is connected. When the pressure difference across the fuel filter 52 is not greater than the preset pressure difference for the fuel system, the pipeline between the fuel outlet of the fuel tank 51 and the fuel inlet of the fuel tank 51 is disconnected through the first three-way valve 53 for the fuel system, and the pipeline between the fuel outlet of the fuel tank 51 and the fuel filter 52 is connected.

[0226] In this embodiment, when the pressure difference of the fuel filter 52 is abnormal, the pipeline between the fuel outlet of the fuel tank 51 and the fuel inlet of the fuel tank 51 is opened through the first three-way valve 53 for the fuel system, and the fuel flowing out of the fuel outlet of the fuel tank 51 returns to the fuel tank 51 through the fuel inlet of the fuel tank 51. When the pressure difference across the fuel filter 52 is normal, the fuel flowing out of the fuel outlet of the fuel tank 51 continues to flow downward and thus enters the generator 21 for combustion.

[0227] In one embodiment, the temperature of the fuel in the pipeline between the fuel outlet of the fuel tank 51 and the fuel inlet of the engine 21 is detected. When the temperature meets the preset combustion temperature, the fuel flowing out of the fuel outlet of the fuel tank 51 is directly supplied to the engine 21 for combustion. When the temperature does not meet the preset combustion temperature, the fuel flowing out of the fuel outlet of the fuel tank 51 cools the lubricating oil through the fuel-lubricating oil heat exchange system 60 to increase the temperature of the fuel, and the heated fuel is supplied to the engine 21 for combustion.

[0228] The preset combustion temperature in this embodiment is the combustion temperature when the engine is ignited, which is set in advance. Of course, it can also be adjusted according to the actual implementation scenario.

[0229] In this embodiment, by comparing the fuel temperature with the preset combustion temperature, it is determined whether the fuel temperature meets the condition of direct combustion. When it does not meet, the fuel enters the fuel-lubricating oil heat exchange system 60 to increase the temperature of the fuel.

[0230] A preferred solution for the pipeline connection to implement this embodiment is as follows:

[0231] Refer to Figure 13, the fuel system 50 further includes a second three-way valve 56 for the fuel system. The inlet of the second three-way valve 56 for the fuel system is connected to the fuel outlet of the fuel tank 51 through a pipeline. One outlet of the second three-way valve 56 for the fuel system is connected to the fuel inlet of the engine 21 through a pipeline. The other outlet of the second three-way valve 56 for the fuel system is connected to the fuel inlet of the fuel-oil heat exchange system 60. The fuel outlet of the fuel-oil heat exchange system 60 is connected to the fuel inlet of the engine 21 through a pipeline.

[0232] A first temperature sensor for the fuel system is provided on the pipeline between the fuel outlet of the fuel tank 51 and the second three-way valve 56 for the fuel system. When the temperature monitored by the first temperature sensor for the fuel system does not meet (i.e., is lower than) the preset combustion temperature, the pipeline between the fuel outlet of the fuel tank 51 and the fuel inlet of the engine 21 is disconnected through the second three-way valve 56 for the fuel system, and the pipeline between the fuel outlet of the fuel tank 51 and the fuel inlet of the fuel-oil heat exchange system 60 is connected. When the temperature detected by the first temperature sensor for the fuel system meets (i.e., is not lower than) the preset combustion temperature, the pipeline between the fuel outlet of the fuel tank 51 and the fuel inlet of the fuel-oil heat exchange system 60 is disconnected through the second three-way valve 56 for the fuel system, and the pipeline between the fuel outlet of the fuel tank 51 and the fuel inlet of the engine 21 is connected.

[0233] In this embodiment, the temperature monitored in real time by the first temperature sensor for the fuel system is compared with the preset combustion temperature. Only when the temperature is lower than the preset combustion temperature, the fuel flowing out of the fuel outlet of the fuel tank 51 is heated by the fuel-oil heat exchange system 60 and then supplied to the engine 21 for combustion.

[0234] In one embodiment, when a fuel filter 52 is provided on the pipeline between the fuel outlet of the fuel tank 51 and the fuel inlet of the engine 21, the second three-way valve 56 for the fuel system is provided on the pipeline between the fuel filter 52 and the fuel inlet of the engine 21. That is to say, the inlet of the second three-way valve 56 for the fuel system is connected to the outlet of the fuel filter 52 through a pipeline.

[0235] In one embodiment, when the temperature does not meet the preset combustion temperature and is lower than the preset temperature for the fuel system, the fuel flowing out of the fuel outlet of the fuel tank 51 exchanges heat with the motor controller 23, and then the fuel-oil heat exchange system 60 is used to cool the lubricating oil to heat the fuel. The heated fuel is supplied to the engine 21 for combustion. When the temperature does not meet the preset combustion temperature and is not lower than the preset temperature for the fuel system, the fuel flowing out of the fuel outlet of the fuel tank 51 cools the lubricating oil through the fuel-oil heat exchange system 60 to heat the fuel. The heated fuel is supplied to the engine 21 for combustion.

[0236] In this embodiment, when the fuel temperature does not meet the preset combustion temperature, the fuel temperature is also compared with the preset temperature for the fuel system. When the fuel temperature is lower than the preset temperature for the fuel system, the fuel flowing out of the fuel outlet of the fuel tank 51 flows into the motor controller 23 to cool the motor controller 23 and heat the fuel. The heated fuel is then heated by the fuel and lubricating oil heat exchange system 60 and then supplied to the engine 21 for combustion. When the fuel temperature is not lower than the preset temperature for the fuel system, the fuel flowing out of the fuel outlet of the fuel tank 51 does not reach the combustion temperature, so it still needs to be heated by the fuel and lubricating oil heat exchange system 60 and then supplied to the engine 21 for combustion.

[0237] A preferred solution for pipe connection to implement this embodiment is as follows:

[0238] Reference Figure 13 The fuel system 50 also includes a third three-way valve 57 for the fuel system and a fourth three-way valve 58 for the fuel system.

[0239] The inlet of the third three-way valve 57 for the fuel system is connected to the fuel outlet of the fuel tank 51 through a pipeline, one outlet of the third three-way valve 57 for the fuel system is connected to the second three-way valve 56 for the fuel system through a pipeline, and the other outlet of the third three-way valve 57 for the fuel system is connected to the fuel heat dissipation inlet of the motor controller 23 through a pipeline.

[0240] One inlet of the fourth three-way valve 58 for the fuel system is connected to the second three-way valve 56 for the fuel system through a pipeline, and the other inlet of the fourth three-way valve 58 for the fuel system is connected to the fuel heat dissipation outlet of the motor controller 23 and the fuel outlet of the lubricating oil heat exchange system 60 through pipelines, and the outlet of the fourth three-way valve 58 for the fuel system is connected to the fuel inlet of the engine 21 through a pipeline. The fourth three-way valve 58 for the fuel system is linked to the second three-way valve 56 for the fuel system and the third three-way valve 57 for the fuel system.

[0241] When the temperature monitored by the first temperature sensor of the fuel system does not meet the preset combustion temperature and is lower than the preset temperature of the fuel system, the pipeline between the fuel outlet of the fuel tank 51 and the second three-way valve 56 of the fuel system is disconnected by the third three-way valve 57 of the fuel system, and the pipeline between the fuel outlet of the fuel tank 51 and the fuel heat dissipation inlet of the motor controller 23 is connected; the pipeline between the fuel inlet of the engine 21 and the fuel heat dissipation outlet of the motor controller 23 and the fuel outlet of the fuel and lubricating oil heat exchange system 60 is disconnected by the fourth three-way valve 58 of the fuel system, and the pipeline between the second three-way valve 56 of the fuel system and the fuel inlet of the engine 21 is connected.

[0242] That is, when the fuel enters the motor controller 23 through the fuel system using the third three-way valve 57 to be heated, Figure 13As shown by the dashed arrow, the passage between the fuel inlet of the motor controller 23 and the engine 21 is disconnected by the fourth three-way valve 58 of the fuel system, and the passage between the second three-way valve 56 of the fuel system and the fuel inlet of the engine 21 is connected by the fourth three-way valve 58 of the fuel system, so that the fuel is heated by the fuel-oil and lubricating oil heat exchange system 60 and then supplied to the engine 21 for combustion.

[0243] When the temperature monitored by the first temperature sensor of the fuel system does not meet the preset combustion temperature and is not lower than the preset temperature of the fuel system, the pipeline between the fuel outlet of the fuel tank 51 and the fuel heat dissipation inlet of the motor controller 23 is disconnected by the third three-way valve 57 of the fuel system, and the pipeline between the fuel outlet of the fuel tank 51 and the second three-way valve 56 of the fuel system is connected. The pipeline between the fuel outlet of the fuel tank 51 and the fourth three-way valve 58 of the fuel system is disconnected by the second three-way valve 56 of the fuel system, and the pipeline between the fuel outlet of the fuel tank 51 and the fuel inlet of the fuel-oil and lubricating oil heat exchange system 60 is connected. The pipeline between the second three-way valve 56 of the fuel system and the fuel inlet of the engine 21 is disconnected by the fourth three-way valve 58 of the fuel system, and the pipeline between the fuel outlet of the fuel-oil and lubricating oil heat exchange system 60 and the fuel inlet of the engine 21 is connected. That is to say, the fuel flowing out of the fuel outlet of the fuel tank 51 is heated by the fuel-oil and lubricating oil heat exchange system 60 and then supplied to the engine 21 for combustion.

[0244] When the temperature monitored by the first temperature sensor of the fuel system meets the preset combustion temperature, the pipeline between the fuel outlet of the fuel tank 51 and the fuel heat dissipation inlet of the motor controller 23 is disconnected by the third three-way valve 57 of the fuel system, and the pipeline between the fuel outlet of the fuel tank 51 and the second three-way valve 56 of the fuel system is connected. The pipeline between the fuel outlet of the fuel tank 51 and the fuel inlet of the fuel-oil and lubricating oil heat exchange system 60 is disconnected by the second three-way valve 56 of the fuel system, and the pipeline between the fuel outlet of the fuel tank 51 and the fourth three-way valve 58 of the fuel system is connected. The pipelines between the fuel heat dissipation outlet of the motor controller 23, the fuel outlet of the fuel-oil and lubricating oil heat exchange system 60 and the fuel inlet of the engine 21 are disconnected by the fourth three-way valve 58 of the fuel system, and the pipeline between the second three-way valve 56 of the fuel system and the fuel inlet of the engine 21 is connected. That is to say, the fuel flowing out of the fuel outlet of the fuel tank 51 is directly supplied to the engine 21 for combustion.

[0245] In this embodiment, the preset temperature of the fuel system is a preset temperature, such as 30 degrees. Of course, it can also be adjusted according to the actual implementation scenario.

[0246] In one embodiment, when a fuel filter 52 is provided on the pipeline between the fuel outlet of the fuel tank 51 and the fuel inlet of the engine 21, the fuel filter 52 is provided on the pipeline between the fuel outlet of the fuel tank 51 and the third three-way valve 57 for the fuel system. That is to say, the inlet of the third three-way valve 57 for the fuel system is connected to the outlet of the fuel filter 52 through a pipeline.

[0247] In one embodiment, on the entire system pipeline of the fuel system 50, one or more temperature sensors and one or more pressure sensors can be provided according to actual needs to monitor the temperature or pressure at each preset monitoring point on the system pipeline.

[0248] In one embodiment, referring to Figure 13 , the fuel system 50 further includes at least one of a liquid level gauge 59, an exhaust pipe 510, and an oil drain valve 511.

[0249] The liquid level of the fuel in the fuel tank 51 is monitored by the liquid level gauge 59. The fuel tank 51 is exhausted through the exhaust pipe 510. The fuel tank 51 is subjected to lubricating oil draining treatment through the oil drain valve 511. Therefore, the oil drain valve 511 is preferably provided at the lower part or the bottom of the fuel tank 51.

[0250] In one embodiment, the thermal balance system further includes a monitoring system for monitoring the operation of the thermal balance system. The monitoring system includes at least one sensor such as a flow meter, a flow regulating valve, a temperature sensor, a pressure sensor, a flow sensor, a speed sensor, and a metal chip detector provided at each preset position. The sensing information collected by the sensor in real time is compared with a preset range, and when it exceeds the preset range, an alarm or control is performed.

[0251] The function of the monitoring system (also called the monitoring and measurement system) is to collect and analyze important state parameters of the engine to achieve fault diagnosis and status monitoring of the engine, ensure the safe operation of the engine, and implement health management.

[0252] In one embodiment, the control module further includes an electronic controller and a powertrain controller connected to each other.

[0253] Each sensor in the monitoring system is connected to the electronic controller. The sensing information collected by the sensor in real time is compared with a preset range through the electronic controller. When it exceeds the preset range, the powertrain controller exchanges data with the client through the CAN and RS232 communication buses, and the powertrain controller connects the alarm signal to the client alarm system through the output alarm circuit.

[0254] In one embodiment, the monitoring system can be used for over-temperature and over-speed monitoring:

[0255] The hybrid system further includes an electronically controlled unit and a powertrain control unit which are interconnected.

[0256] The monitoring system includes a rotational speed sensor and an exhaust gas temperature sensor. The rotational speed of the engine 21 is measured by the rotational speed sensor and transmitted to the electronically controlled unit, and the exhaust gas temperature of the engine 21 is measured by the exhaust gas temperature sensor and the exhaust gas temperature value is transmitted to the electronically controlled unit. The electronically controlled unit compares the real-time collected rotational speed and exhaust gas temperature value with preset alarm limit values and parking protection limit values respectively to determine the operating state of the engine 21.

[0257] When at least one of the rotational speed and the exhaust gas temperature value exceeds the preset alarm limit value, the powertrain control unit transmits the fault status information to the storage display and warning system of the client to issue an alarm signal.

[0258] When at least one of the rotational speed and the exhaust gas temperature value exceeds the preset parking protection limit value, the powertrain control unit issues an alarm signal, and at the same time the electronically controlled unit executes an interlock parking protection control to stop the engine 21.

[0259] In this embodiment, the alarm limit values and the parking protection limit values are both preset limit values, and multiple limit values are correspondingly set according to the number of monitoring parameters. For example, in this embodiment, the alarm limit values include a rotational speed alarm limit value and an exhaust gas temperature alarm limit value, and the parking protection limit values include a rotational speed parking protection limit value and an exhaust gas temperature parking protection limit value. When comparing the parameters, separate comparisons are made. For example, the real-time collected rotational speed is compared with the rotational speed alarm limit value to determine whether the real-time collected rotational speed exceeds the rotational speed alarm limit value; the real-time collected exhaust gas temperature value is compared with the exhaust gas temperature alarm limit value to determine whether the real-time collected exhaust gas temperature value exceeds the exhaust gas temperature alarm limit value.

[0260] In one embodiment, the monitoring system can be used for the failure monitoring of the lubricating oil system:

[0261] The hybrid system further includes an electronically controlled unit and a powertrain control unit which are interconnected.

[0262] The lubricating oil cooling circulation system 40 includes a lubricating oil tank 41. The lubricating oil outlet of the lubricating oil tank 41 is connected to the heat dissipation inlet of the bearing 211 of the engine 21 through a pipeline in sequence via a lubricating oil pump and a lubricating oil filter component 410.

[0263] The monitoring system includes three lubricating oil pressure sensors, a lubricating oil temperature sensor 411, and a metal chip detector 412. The three lubricating oil pressure sensors respectively measure the lubricating oil pressure after the lubricating oil pump, the lubricating oil pressure after the lubricating oil filter component, and the lubricating oil pressure at the inlet of the reducer of the engine 21, and transmit the three lubricating oil pressure values to the electronic controller. The lubricating oil temperature sensor 411 measures the lubricating oil temperature in the lubricating oil tank 41 and transmits the lubricating oil temperature value to the electronic controller. The metal chip detector 412 detects the metal chips in the return oil of the lubricating oil tank 41 and transmits the detection result to the electronic controller. The detection result is determined by the electronic controller, and the real-time collected lubricating oil pressure value and lubricating oil temperature value are respectively compared with the preset alarm limit values by the electronic controller to realize the status monitoring of the lubricating oil system.

[0264] When at least one of the lubricating oil pressure value and the lubricating oil temperature value exceeds the preset alarm limit value or the detection result is in a conducting state, the powertrain controller transmits the fault status information to the storage display and warning system of the client to issue an alarm signal.

[0265] The lubricating oil filter component 410 in this embodiment is preferably integrated on the engine 21.

[0266] In one embodiment, the monitoring system can be used for fuel system fault monitoring:

[0267] The hybrid power system further includes an electronic controller and a powertrain controller connected to each other.

[0268] The engine 21 has a main oil circuit and a starting oil circuit. A main fuel pump is arranged on the main oil circuit, and a starting fuel pump is arranged on the starting oil circuit;

[0269] The monitoring system includes a main fuel pressure switch arranged on the main oil circuit and a starting fuel pressure switch arranged on the starting oil circuit. The electronic controller monitors the switch states of the main fuel pressure switch and the starting fuel pressure switch to realize the monitoring of the working conditions of the main fuel pump and the starting fuel pump;

[0270] When the switch state of the main fuel pressure switch or the starting fuel pressure switch is on, it is considered that the corresponding fuel pump has a fault, and the powertrain controller transmits the fault status information to the storage display and warning system of the client;

[0271] When only one of the main fuel pump and the starting fuel pump has a fault, the electronic controller switches to the single-pump fuel supply control mode. When both the main fuel pump and the starting fuel pump have faults, the electronic controller executes the interlock parking protection control logic and the engine 21 stops.

[0272] An embodiment of the present invention further provides a testing method, which adopts the thermal balance system provided by each of the above embodiments of the present invention. The thermal balance system is preferably installed on the test bench provided by each of the above embodiments of the present invention. The testing method includes:

[0273] S1. Design a test platform that meets the simulation requirements. Corresponding sensors are provided at the preset key nodes of each pipeline in the test platform and before and after the pump. The sensors are at least one of a flowmeter, a pressure sensor, a temperature sensor, and a flow regulating valve. This is to facilitate the monitoring of the flow rate, temperature monitoring, and flow rate adjustment of each pipeline node during the test.

[0274] Specifically, this step includes:

[0275] S11. For heat generating devices including an engine, an output motor, and a motor controller, according to the working conditions including the working temperature and working pressure and the structural characteristics of each heat generating device, through simulation analysis, different cooling media are selected for simulation testing. The flow rate, inlet temperature, and outlet temperature of the cooling medium are set in the simulation software to obtain a cooling solution that meets the working temperature and working pressure of the device. Specifically, the simulation aims to determine the following parameters: determine the flow rate, inlet temperature, and outlet temperature of the cooling medium required for the heat generating device to operate under the specified working conditions.

[0276] S12. Based on the simulation solution, according to the preset test solution of the thermal management system, combined with the parameters in the actual test pipeline network including pressure, pressure drop, and the fuel temperature and pressure required for engine combustion, design a test platform that can meet the simulation requirements.

[0277] Preferably, for the convenience of actual use and adjustment, the simulation solution of the test platform is enlarged. For example, the flow rate entering the corresponding device is enlarged, and the temperature entering the device and the temperature of the output device are reduced.

[0278] S2. In the initial stage, a primary functional system is used for primary thermal balance testing. The cooling medium output and return containers and pipelines of the test platform are enlarged by several times of the conventional size (for example, the oil sump and its output flow rate are enlarged by 10 times) to ensure sufficient redundancy during the test process, so as to be able to adjust flexibly. At this time, the motor controller, the electronic controller, and the powertrain controller are all placed separately, and a corresponding cooling solution is formulated for the motor controller (the main heat generating component) to optimize its working environment in the system.

[0279] At this stage, flow meters, temperature sensors, flow control valves and other testing or adjustment devices are installed at each pipeline node of each medium on the test platform and before and after the pump to facilitate flow monitoring, pressure and temperature monitoring and flow adjustment of each pipeline node during the test. According to the final test, the parameters such as incoming medium flow, input and output pressures, input and output temperatures that are actually needed to meet the working conditions of the equipment are obtained.

[0280] At this stage, industrial-grade pumps are used, regardless of size and long-term operation, to meet the needs of short-term test data.

[0281] S3, based on the initial test results, determine the parameters such as medium flow rate, inlet and outlet temperatures that meet the actual working conditions, select pumps that can achieve each parameter, and test again by adjusting the speed of each pump.

[0282] At this stage, the pump is upgraded to a more suitable model by reducing unnecessary test or adjustment devices on the pipeline. In this way, subsequent tests can be carried out by adjusting the speed of the pump to obtain a more accurate solution.

[0283] S4, based on the retest results, the volume of each controller included in the control module is gradually reduced and integrated into the motor, and a secondary functional system is used to perform a secondary test of thermal balance, and the medium volume of the lubricating oil tank, various heat exchange equipment, and the output and return medium are reduced several times relative to the primary functional system and integrated into the top surface of the test bench, thereby creating a more miniaturized and highly integrated system. At the same time, each control pump can be further upgraded to a more advanced model, and adjustments can be made based on the existing test plan to make it more in line with the structural requirements of the actual product.

[0284] In the secondary test, the control module includes controllers that are any one or more combinations of motor controllers, electronic controllers, powertrain controllers, and power management controllers.

[0285] Through the above steps, the gradual optimization and integrated test scheme can be used to test the thermal management scheme of the thermal balance system to meet the temperature and pressure required for the operation of each component at a relatively low cost. Subsequently, it is gradually replaced with precise small equipment and the various parts are integrated for more accurate testing. This method reduces the testing cost overall, and the early test system can adapt to a variety of hybrid power structures, which is convenient and flexible to adjust. The entire test scheme can also independently explore the parameters of individual equipment, so as to more accurately and effectively configure and adjust the later miniaturization and integration schemes, reducing unnecessary waste and investment in later tests.

[0286] The preferred embodiments of the present invention have been described in detail above. However, it should be understood that after reading the above teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention. These equivalent forms also fall within the scope defined by the appended claims of this application.

Claims

1. A thermal balance system, characterized in that: The heat balance system comprises: A hybrid power system, the hybrid power system comprising an engine, an output motor driven by the engine to output electric power; A control module, the control module including a motor controller of the output motor; Functional system, the functional system includes a water cooling circulation system, a lubricating oil cooling circulation system, a fuel system, a fuel and lubricating oil heat exchange system and an air cooling system; A combination of at least one or more of the lubricating oil cooling circulation system, the fuel system, the water cooling circulation system, the fuel and lubricating oil heat exchange system, and the air cooling system is used to dissipate heat for any one or more of the bearings of the engine, the bearings of the output motor, and the motor controller; The fuel system is also used for combustion of the engine.

2. The heat balance system according to claim 1, characterized in that: The functional system is a primary functional system for primary functional testing, the motor controller is located on the side of the hybrid power system, and the primary functional system is located around the hybrid power system and the control module; Preferably, the exhaust port of the engine is the front end; The water heat dissipation circulation system is located at the front side of the engine, the lubricating oil heat dissipation circulation system is located at the left side of the engine, the fuel system is located at the right side of the engine, and the fuel and lubricating oil heat exchange system and the air cooling heat dissipation system are located at the rear side of the engine; And / or, the thermal balance system further comprises a secondary functional system for subsequent testing, the secondary functional system comprising some or all functional components of the primary functional system that are several times smaller, and the secondary functional system is integrated around the hybrid power system; Preferably, the secondary functional system includes any one or more of a lubricating oil cooling circulation system, a fuel system, a water cooling circulation system, a fuel and lubricating oil heat exchange system, and an air cooling system that are several times smaller than the primary functional system. At this time, the control module corresponding to the secondary functional system includes each controller whose size is smaller than that of the primary functional system and is integrated into the output motor.

3. The heat balance system according to claim 1 or 2, characterized in that: The water heat dissipation circulation system is used to cool the motor controller, and the water heat dissipation circulation system includes: A water tank, wherein the water outlet of the water tank is connected to the heat dissipation inlet of the electric controller of the motor controller through a pipeline, and the water return port of the water tank is connected to the heat dissipation outlet of the electric controller of the motor controller through a pipeline; Preferably, a water filter is arranged on the pipeline between the water outlet of the water tank and the heat dissipation inlet of the electric controller of the motor controller, a three-way valve for water heat dissipation is arranged between the water outlet of the water tank and the water filter, the other outlet of the three-way valve for water heat dissipation is connected to the water inlet of the water tank, and pressure sensors for water heat dissipation are respectively arranged on the pipelines on both sides of the water filter; the pressure information on both sides of the water filter is detected by the two pressure sensors for water heat dissipation, and when the pressure difference on both sides of the water filter is greater than the preset pressure difference for water heat dissipation, the pipeline between the water outlet of the water tank and the water filter is disconnected by the three-way valve for water heat dissipation and the pipeline between the water outlet of the water tank and the water inlet of the water tank is connected, otherwise the pipeline between the water outlet of the water tank and the water inlet of the water tank is disconnected by the three-way valve for water heat dissipation and the pipeline between the water outlet of the water tank and the water filter is connected; More preferably, the mesh size of the water filter is 200 to 300 meshes; More preferably, a heat exchanger is further provided on the pipeline between the heat dissipation outlet of the electric controller of the motor controller and the water return port of the water tank.

4. The heat balance system according to claim 1 or 2, characterized in that: The lubricating oil heat dissipation circulation system comprises: A lubricating oil box, wherein the lubricating oil outlet of the lubricating oil box is connected to the heat dissipation inlet of the bearing through a pipeline, and the lubricating oil return port of the lubricating oil box is connected to the heat dissipation outlet of the bearing through a pipeline via at least one heat dissipation system of the fuel and lubricating oil heat exchange system and the air cooling heat dissipation system; Preferably, an oil filter is provided on the pipeline between the oil outlet of the oil box and the heat dissipation inlet of the bearing, a first three-way valve for oil heat dissipation is provided between the oil outlet of the oil box and the oil filter, the other outlet of the first three-way valve for oil heat dissipation is connected to the oil inlet of the oil box, and oil heat dissipation pressure sensors are respectively provided on the pipelines on both sides of the oil filter; the pressure information on both sides of the oil filter is detected by the two oil heat dissipation pressure sensors, when the pressure difference on both sides of the oil filter is greater than the preset pressure difference for oil heat dissipation, the pipeline between the oil outlet of the oil box and the oil filter is disconnected by the first three-way valve for oil heat dissipation and the pipeline between the oil outlet of the oil box and the oil inlet of the oil box is connected; otherwise, the pipeline between the oil outlet of the oil box and the oil inlet of the oil box is disconnected by the first three-way valve for oil heat dissipation and the pipeline between the oil outlet of the oil box and the oil filter is connected; More preferably, the mesh size of the lubricating oil filter is 200-300 mesh; More preferably, when the pressure difference between the two sides of the lubricating oil filter is greater than the preset pressure difference for lubricating oil heat dissipation, an alarm is issued.

5. The heat balance system according to claim 4, characterized in that: The temperature of the lubricating oil on the pipeline between the lubricating oil outlet of the lubricating oil box and the heat dissipation inlet of the bearing is detected. When the temperature is higher than the preset temperature for lubricating oil heat dissipation, the lubricating oil flowing out of the lubricating oil outlet of the lubricating oil box directly enters the heat dissipation inlet of the bearing to dissipate the heat of the bearing. When the temperature is not higher than the preset temperature for lubricating oil heat dissipation, part of the lubricating oil flowing out of the lubricating oil outlet of the lubricating oil box enters the motor controller to dissipate the heat of the motor controller. After the heated lubricating oil is cooled by at least one heat dissipation system of the fuel-lubricating oil heat exchange system and the air-cooled heat dissipation system, it returns to the lubricating oil box. Preferably, a second three-way valve for lubricating oil heat dissipation is arranged on the pipeline between the lubricating oil outlet of the lubricating oil box and the heat dissipation inlet of the bearing, the other outlet of the second three-way valve for lubricating oil heat dissipation is connected to the lubricating oil heat dissipation inlet of the motor controller, and the lubricating oil heat dissipation outlet of the motor controller is connected to the lubricating oil return port of the lubricating oil box through a pipeline via at least one heat dissipation system of the fuel and lubricating oil heat exchange system and the air-cooled heat dissipation system; a first temperature sensor for lubricating oil heat dissipation is arranged on the pipeline between the lubricating oil outlet of the lubricating oil box and the second three-way valve for lubricating oil heat dissipation, and when the temperature of the first temperature sensor for lubricating oil heat dissipation is higher than the preset temperature for lubricating oil heat dissipation, the lubricating oil heat dissipation is turned on and off by the second three-way valve for lubricating oil heat dissipation. disconnecting the pipeline between the oil outlet of the oil box and the oil heat dissipation inlet of the motor controller and connecting the pipeline between the oil outlet of the oil box and the heat dissipation inlet of the bearing; otherwise, disconnecting the pipeline between the oil outlet of the oil box and the heat dissipation inlet of the bearing and connecting the pipeline between the oil outlet of the oil box and the oil heat dissipation inlet of the motor controller through the second three-way valve for oil heat dissipation within a preset time period, and disconnecting the pipeline between the oil outlet of the oil box and the oil heat dissipation inlet of the motor controller and connecting the pipeline between the oil outlet of the oil box and the heat dissipation inlet of the bearing through the second three-way valve for oil heat dissipation after the preset time period; More preferably, when a lubricating oil filter is provided on the pipeline between the lubricating oil outlet of the lubricating oil box and the heat dissipation inlet of the bearing, the second three-way valve for lubricating oil heat dissipation is provided on the pipeline between the lubricating oil filter and the heat dissipation inlet of the bearing; More preferably, the heat dissipation outlet of the bearing and the lubricating oil heat dissipation outlet of the motor controller are respectively connected to the lubricating oil inlet of the fuel and lubricating oil heat exchange system and the inlet of the air cooling and heat dissipation system through a third three-way valve for lubricating oil heat dissipation, and the lubricating oil return port of the lubricating oil tank is respectively connected to the lubricating oil outlet of the fuel and lubricating oil heat exchange system and the outlet of the air cooling and heat dissipation system through a fourth three-way valve for lubricating oil heat dissipation; More preferably, the heat dissipation outlet of the bearing, the lubricating oil heat dissipation outlet of the motor controller and the third three-way valve for lubricating oil heat dissipation are also connected through a fifth three-way valve for lubricating oil heat dissipation, and the fifth three-way valve for lubricating oil heat dissipation is linked to the second three-way valve for lubricating oil heat dissipation.

6. The heat balance system according to claim 1 or 2, characterized in that: The fuel system comprises: A fuel tank, wherein a fuel outlet of the fuel tank is connected to a fuel inlet of the engine through a pipeline; Preferably, a fuel filter is arranged on the pipeline between the fuel outlet of the fuel tank and the fuel inlet of the engine, a first three-way valve for a fuel system is arranged between the fuel filter and the fuel outlet of the fuel tank, the other outlet of the first three-way valve for the fuel system is connected to the fuel inlet of the fuel tank, and pressure sensors for the fuel system are respectively arranged on the pipelines on both sides of the fuel filter; the pressure information on both sides of the fuel filter is detected by two pressure sensors for the fuel system, when the pressure difference on both sides of the fuel filter is greater than the preset pressure difference for the fuel system, the pipeline between the fuel outlet of the fuel tank and the fuel filter is disconnected by the first three-way valve for the fuel system, and the pipeline between the fuel outlet of the fuel tank and the fuel inlet of the fuel tank is connected; otherwise, the pipeline between the fuel outlet of the fuel tank and the fuel inlet of the fuel tank is disconnected by the first three-way valve for the fuel system, and the pipeline between the fuel outlet of the fuel tank and the fuel filter is connected.

7. The heat balance system according to claim 6, characterized in that: The temperature of the fuel in the pipeline between the fuel outlet of the fuel tank and the fuel inlet of the engine is detected. When the temperature meets the preset combustion temperature, the fuel flowing out of the fuel outlet of the fuel tank is directly supplied to the engine for combustion. When the temperature does not meet the preset combustion temperature, the fuel flowing out of the fuel outlet of the fuel tank is cooled by the lubricating oil heat exchange system to increase the temperature of the fuel, and the heated fuel is supplied to the engine for combustion. Preferably, when the temperature does not meet the preset combustion temperature and is lower than the preset temperature for the fuel system, the fuel flowing out of the fuel outlet of the fuel tank exchanges heat with the motor controller, and then cools the lubricating oil through the fuel and lubricating oil heat exchange system to achieve fuel temperature increase, and the heated fuel is supplied to the engine for combustion; when the temperature does not meet the preset combustion temperature and is not lower than the preset temperature for the fuel system, the fuel flowing out of the fuel outlet of the fuel tank exchanges heat with the lubricating oil through the fuel and lubricating oil heat exchange system to achieve fuel temperature increase, and the heated fuel is supplied to the engine for combustion; More preferably, a second three-way valve for a fuel system is provided on a pipeline between the fuel outlet of the fuel tank and the fuel inlet of the engine, the other outlet of the second three-way valve for a fuel system is connected to the fuel inlet of the fuel and lubricating oil heat exchange system, and the fuel outlet of the fuel and lubricating oil heat exchange system is connected to the fuel inlet of the engine through a pipeline; a first temperature sensor for a fuel system is provided on a pipeline between the fuel outlet of the fuel tank and the second three-way valve for a fuel system, when the temperature of the first temperature sensor for a fuel system does not meet a preset combustion temperature, the pipeline between the fuel outlet of the fuel tank and the fuel inlet of the engine is disconnected by the second three-way valve for a fuel system, and the pipeline between the fuel outlet of the fuel tank and the fuel inlet of the fuel and lubricating oil heat exchange system is connected; otherwise, the pipeline between the fuel outlet of the fuel tank and the fuel inlet of the fuel and lubricating oil heat exchange system is disconnected by the second three-way valve for a fuel system, and the pipeline between the fuel outlet of the fuel tank and the fuel inlet of the engine is connected; More preferably, a third three-way valve for a fuel system is provided on a pipeline between the fuel outlet of the fuel tank and the second three-way valve for a fuel system, the other outlet of the third three-way valve for a fuel system is connected to a fuel heat dissipation inlet of the motor controller, a fourth three-way valve for a fuel system is provided on a pipeline between the second three-way valve for a fuel system and the fuel inlet of the engine, the other inlet of the fourth three-way valve for a fuel system is respectively connected to a fuel heat dissipation outlet of the motor controller and a fuel outlet of the fuel and lubricating oil heat exchange system, and the fourth three-way valve for a fuel system is respectively linked to the second three-way valve for a fuel system and the third three-way valve for a fuel system; When the temperature of the first temperature sensor for the fuel system does not meet the preset combustion temperature and is lower than the preset temperature for the fuel system, the pipeline between the fuel outlet of the fuel tank and the second three-way valve for the fuel system is disconnected by the third three-way valve for the fuel system, and the pipeline between the fuel outlet of the fuel tank and the fuel heat dissipation inlet of the motor controller is connected; the pipeline between the fuel inlet of the engine and the fuel heat dissipation outlet of the motor controller and the fuel outlet of the fuel and lubricating oil heat exchange system is disconnected by the fourth three-way valve for the fuel system, and the pipeline between the second three-way valve for the fuel system and the fuel inlet of the engine is connected; When the temperature of the first temperature sensor for the fuel system does not meet the preset combustion temperature and is not lower than the preset temperature for the fuel system, the pipeline between the fuel outlet of the fuel tank and the fuel heat dissipation inlet of the motor controller is disconnected by the third three-way valve for the fuel system, and the pipeline between the fuel outlet of the fuel tank and the second three-way valve for the fuel system is connected; the pipeline between the fuel outlet of the fuel tank and the fourth three-way valve for the fuel system is disconnected by the second three-way valve for the fuel system, and the pipeline between the fuel outlet of the fuel tank and the fuel inlet of the fuel and lubricating oil heat exchange system is connected; the pipeline between the second three-way valve for the fuel system and the fuel inlet of the engine is disconnected by the fourth three-way valve for the fuel system, and the pipeline between the fuel outlet of the fuel and lubricating oil heat exchange system and the fuel inlet of the engine are connected; When the temperature of the first temperature sensor for the fuel system meets the preset combustion temperature, the pipeline between the fuel outlet of the fuel tank and the fuel heat dissipation inlet of the motor controller is disconnected by the third three-way valve for the fuel system, and the pipeline between the fuel outlet of the fuel tank and the second three-way valve for the fuel system is connected; the pipeline between the fuel outlet of the fuel tank and the fuel inlet of the fuel and lubricating oil heat exchange system is disconnected by the second three-way valve for the fuel system, and the pipeline between the fuel outlet of the fuel tank and the fourth three-way valve for the fuel system is connected; the pipelines between the fuel heat dissipation outlet of the motor controller, the fuel outlet of the fuel and lubricating oil heat exchange system and the fuel inlet of the engine are disconnected by the fourth three-way valve for the fuel system, and the pipeline between the second three-way valve for the fuel system and the fuel inlet of the engine is connected; More preferably, when a fuel filter is provided on the pipeline between the fuel outlet of the fuel tank and the fuel inlet of the engine, the fuel filter is provided on the pipeline between the fuel outlet of the fuel tank and the third three-way valve for the fuel system.

8. The heat balance system according to claim 1 or 2, characterized in that: The heat balance system also includes: A monitoring system for monitoring the operation of the thermal balance system, the monitoring system comprising at least one sensor selected from the group consisting of a flow meter, a flow regulating valve, a temperature sensor, a pressure sensor, a flow sensor, a rotation speed sensor, and a metal chip detector, arranged at each preset position, comparing the sensing information collected by the sensor in real time with a preset range, and giving an alarm or controlling when the preset range is exceeded; Preferably, the control module further comprises an electronic controller and a powertrain controller connected to each other, and the monitoring system implements monitoring through any one or more combinations of the following: (1) Each sensor in the monitoring system is connected to the electronic controller, and the electronic controller compares the sensor information collected by the sensor in real time with the preset range. When the preset range is exceeded, the powertrain controller exchanges data with the client through the CAN and RS232 communication buses, and the powertrain controller connects the alarm signal to the client alarm system through the output alarm circuit; (2) The monitoring system includes a speed sensor and an exhaust temperature sensor, wherein the speed sensor measures the engine speed and transmits the speed to the electronic controller, and the exhaust temperature sensor measures the engine exhaust temperature and transmits the exhaust temperature value to the electronic controller, and the electronic controller compares the real-time collected speed and exhaust temperature values ​​with the preset alarm limit value and parking protection limit value respectively to determine the engine operating state; When at least one of the speed and the exhaust temperature value exceeds a preset alarm limit value, the powertrain controller transmits fault status information to the storage display and alarm system of the client and issues an alarm signal; when at least one of the speed and the exhaust temperature value exceeds a preset parking protection limit value, the powertrain controller issues an alarm signal, and the electronic controller executes interlocking parking protection control, and the engine stops; (3) The lubricating oil heat dissipation circulation system comprises an oil tank, the lubricating oil outlet of the oil tank is connected to the heat dissipation inlet of the engine bearing through a pipeline in sequence through an oil pump and an oil filter component; the monitoring system comprises three lubricating oil pressure sensors, a lubricating oil temperature sensor and a metal chip detector, the three lubricating oil pressure sensors respectively measure the lubricating oil pressure after the lubricating oil pump, the lubricating oil pressure after the lubricating oil filter component and the lubricating oil pressure at the engine reducer inlet and transmit the three lubricating oil pressure values ​​to the electronic controller, the lubricating oil temperature sensor measures the lubricating oil temperature in the oil tank and transmits the lubricating oil temperature value to the electronic controller, the metal chip detector detects metal chips in the return oil of the oil tank and transmits the detection result to the electronic controller, the detection result is determined by the electronic controller, and the lubricating oil pressure value and lubricating oil temperature value collected in real time are compared with the preset alarm limit values ​​by the electronic controller, so as to realize the status monitoring of the lubricating oil system; When at least one of the lubricating oil pressure value and the lubricating oil temperature value exceeds a preset alarm limit value or the detection result is in a conduction state, the powertrain controller transmits fault state information to a storage display and alarm system of the client and issues an alarm signal; (4) The engine has a main oil circuit and a starting oil circuit, the main oil circuit is provided with a main fuel pump, and the starting oil circuit is provided with a starting fuel pump; the monitoring system includes a main fuel pressure switch provided on the main oil circuit and a starting fuel pressure switch provided on the starting oil circuit, and the electronic controller monitors the switch state of the main fuel pressure switch and the switch state of the starting fuel pressure switch to monitor the working conditions of the main fuel pump and the starting fuel pump; When the switch state of the main fuel pressure switch or the starting fuel pressure switch is on, it is considered that the corresponding fuel pump is faulty, and the powertrain controller transmits fault status information to the storage display and alarm system of the client; When only one of the main fuel pump and the starting fuel pump fails, the electronic controller switches to the single-pump fuel supply control mode. When both the main fuel pump and the starting fuel pump fail at the same time, the electronic controller executes the interlocking shutdown protection control logic and the engine stops.

9. A testing method, characterized in that: Using the thermal balance system according to any one of claims 1 to 8, the testing method comprises: Design a test platform that meets the simulation requirements, wherein corresponding sensors are provided at preset key nodes of each pipeline in the test platform and before and after the pump, and the sensor is at least one of a flow meter, a pressure sensor, a temperature sensor and a flow control valve; In the initial stage, the primary function system is used to perform the primary thermal balance test. The cooling medium output and return containers and pipelines of the test platform are enlarged several times of the conventional size to ensure sufficient redundancy during the test process so that they can be flexibly adjusted. At this time, the motor controller, electronic controller and powertrain controller are all placed separately, and a corresponding cooling plan is formulated for the motor controller; Based on the initial test results, determine the parameters that meet the actual working conditions, select pumps that can achieve the parameters, and retest by adjusting the speed of each pump; According to the retest results, the controllers included in the control module are gradually reduced in size and integrated into the motor, and a secondary functional system is used to conduct a secondary test of thermal balance. The flow of the lubricating oil tank and various heat exchange equipment is reduced and integrated onto the top surface of the test bench, thus creating an integrated system. At the same time, the models of each pump are continuously adjusted for retesting to make it more in line with the structural requirements of the actual product. Preferably, in the secondary test, the controller included in the control module is any one or more combinations of a motor controller, an electronic controller, a powertrain controller, and a power management controller.

10. The testing method according to claim 9, characterized in that: Design a test bench that meets simulation requirements, including: For heat-generating equipment including engines, output motors and motor controllers, according to the working conditions including working temperature and working pressure and the structural characteristics of each heat-generating equipment, through simulation analysis, different cooling media are selected for simulation testing to determine the cooling medium flow, inlet temperature and outlet temperature required for the heat-generating equipment to operate under the specified working conditions; According to the preset thermal management system test plan, combined with the parameters in the actual test pipeline network including pressure, pressure drop, and fuel temperature and pressure required for engine combustion, a test platform that can meet the simulation requirements is designed.

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