Thermal management system, control method of thermal management system, engine and vehicle

Abstract

The embodiment of the invention discloses a thermal management system, a control method of the thermal management system, an engine and a vehicle. The heat management system comprises an electric control water pump, a heat management module, an engine body assembly, a heater assembly and a radiator assembly. The output end of the electric control water pump is connected with the input end of the engine body assembly, the output end of the engine body assembly is connected with the input end of the heat management module, the first output end of the heat management module is connected with the input end of the heater assembly, and the output end of the heater assembly is connected with the input end of the electric control water pump. The second output end of the heat management module is connected with the input end of the radiator assembly, and the output end of the radiator assembly is connected with the input end of the electric control water pump. According to the technical scheme, precise control over the engine temperature and the engine cooling liquid flow is achieved, and the effects of rapid engine warming and high-temperature protection can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle thermal management, and in particular to a thermal management system, a control method of the thermal management system, an engine, and a vehicle. Background Art

[0002] Traditional heavy-duty diesel engine cooling systems utilize mechanical water pumps and wax-type thermostats, matching the pumps to their rated points. This results in energy waste at low loads, slow temperature rise, and relatively poor fuel consumption and emissions. Vehicles using speed reducers are particularly challenging due to increased system water volume, increased pressure drop, slower temperature rise, and higher heat dissipation requirements. Summary of the Invention

[0003] Embodiments of the present invention provide a thermal management system, a control method for the thermal management system, an engine, and a vehicle. The thermal management system realizes precise control of engine temperature and engine coolant flow, which can achieve both rapid warm-up and high-temperature protection.

[0004] According to a first aspect of the present invention, there is provided a thermal management system comprising an electronically controlled water pump, a thermal management module, an engine body assembly, a heater assembly, and a radiator assembly;

[0005] The output end of the electronically controlled water pump is connected to the input end of the engine body assembly, the output end of the engine body assembly is connected to the input end of the thermal management module, the first output end of the thermal management module is connected to the input end of the heater assembly, the output end of the heater assembly is connected to the input end of the electronically controlled water pump, the second output end of the thermal management module is connected to the input end of the radiator assembly, and the output end of the radiator assembly is connected to the input end of the electronically controlled water pump;

[0006] The thermal management module includes a rotary ball valve, which controls the coolant to circulate through different circulation modes in the thermal management system according to different coolant temperatures and the rotation angle of the rotary ball valve.

[0007] Optionally, the thermal management module further includes a first valve, and the engine body assembly includes a cylinder head water jacket, a cylinder block water jacket, an oil cooler, an exhaust throttle valve, and an air compressor;

[0008] The input end of the cylinder head water jacket is connected to the output end of the electronically controlled water pump, the input ends of the cylinder water jacket and the oil cooler are both connected to the output end of the cylinder head water jacket, the output end of the cylinder water jacket is connected to the thermal management module, the output end of the oil cooler is connected to the thermal management module through the first valve, the input end of the exhaust throttle valve is connected to the output end of the electronically controlled water pump, the output end of the exhaust throttle valve is connected to the thermal management module, the input end of the air compressor is connected to the input end of the electronically controlled water pump, and the output end of the air compressor is connected to the thermal management module.

[0009] Optionally, the heater assembly includes a urea heater, a fuel tank heater and a warm air heater, the input ends of the urea heater, the fuel tank heater and the warm air heater are all connected to the thermal management module, and the output ends of the urea heater, the fuel tank heater and the warm air heater are all connected to the input end of the electronically controlled water pump.

[0010] Optionally, the thermal management module further includes a second valve, a third valve, and a fourth valve, and the radiator assembly includes a retarder, a first bypass line, a second bypass line, and a radiator;

[0011] The input end of the retarder is connected to the thermal management module through the second valve, the output end of the retarder is connected to the input end of the radiator, the output end of the radiator is connected to the input end of the electronically controlled water pump, the input end of the first bypass line is connected to the thermal management module through the third valve, the output end of the first bypass line is connected to the input end of the radiator, the input end of the second bypass line is connected to the thermal management module through the fourth valve, and the output end of the second bypass line is connected to the input end of the electronically controlled water pump.

[0012] Optionally, an expansion water tank is further included, and the input ends of the thermal management module and the radiator are both connected to the input end of the expansion water tank, and the output end of the expansion water tank is connected to the input end of the electronically controlled water pump.

[0013] According to a second aspect of the present invention, a control method for a thermal management system is provided, which is applicable to the thermal management system provided in the first aspect. The control method for the thermal management system includes:

[0014] Obtain engine operating conditions, coolant temperature, and the rotation angle of the rotary ball valve;

[0015] According to the engine operating conditions, coolant temperature and the rotation angle of the rotary ball valve, the thermal management module is controlled to operate so that the coolant circulates through different circulation modes in the thermal management system.

[0016] Optionally, the thermal management module includes a first valve, a second valve, a third valve, and a fourth valve; the engine body assembly includes a cylinder head water jacket, a cylinder block water jacket, an oil cooler, an exhaust throttle valve, and an air compressor; the heater assembly includes a urea heater, a fuel tank heater, and a warm air heater; and the radiator assembly includes a retarder, a first bypass line, a second bypass line, and a radiator;

[0017] Based on engine operating conditions, coolant temperature, and the angle of the rotary ball valve, the thermal management module is controlled to circulate the coolant through different circulation modes in the thermal management system, including:

[0018] When the engine is in warm-up condition, the coolant temperature T mot Meet -40℃≤T mot<35°C, when the rotation angle θ of the rotary ball valve satisfies 0≤θ<10°, the first valve, the second valve, the third valve and the fourth valve are in the closed state, the electronically controlled water pump operates in accordance with the engine speed, the coolant flows through the cylinder head water jacket and the cylinder block water jacket and is divided into three paths through the thermal management module, the coolant flows in parallel through the exhaust throttle valve and the air compressor and is divided into three paths through the thermal management module, the first path passes through the urea heater and returns to the electronically controlled water pump, the second path passes through the fuel tank heater and returns to the electronically controlled water pump, and the third path passes through the warm air heater and returns to the electronically controlled water pump.

[0019] Optionally, controlling the operation of the thermal management module based on the engine operating conditions, coolant temperature, and the rotation angle of the rotary ball valve to cause the coolant to circulate in the thermal management system through different circulation modes also includes:

[0020] When the engine is in warm-up condition, the coolant temperature T mot Meet -70℃≤T mot <85℃, when the rotation angle θ of the rotary ball valve satisfies 10°≤θ<60°, the first valve, the second valve and the third valve are in the closed state, and the fourth valve is in the open state. The fourth valve adjusts the opening angle according to the calibration parameters of the coolant temperature operating condition. The electronically controlled water pump operates with the warm engine MAP. The coolant flows through the cylinder head water jacket and the cylinder block water jacket and is divided into three paths through the thermal management module. The coolant flows in parallel through the exhaust throttle valve and the air compressor and is divided into four paths through the thermal management module. The first path passes through the urea heater and returns to the electronically controlled water pump, the second path passes through the fuel tank heater and returns to the electronically controlled water pump, the third path passes through the warm air heater and returns to the electronically controlled water pump, and the fourth path passes through the second bypass pipe and flows back to the electronically controlled water pump.

[0021] Optionally, controlling the operation of the thermal management module based on the engine operating conditions, coolant temperature, and the rotation angle of the rotary ball valve to cause the coolant to circulate in the thermal management system through different circulation modes also includes:

[0022] When the engine is in hot working condition, the coolant temperature T mot Meet T mot ≥85℃, when the rotation angle θ of the rotary ball valve satisfies 60°≤θ<120°, the second valve and the fourth valve are in the closed state, and the first valve and the third valve are in the gradually opened state. The opening angles of the first valve and the third valve are adjusted according to the ambient temperature, coolant temperature and operating condition calibration parameters. The electronically controlled water pump operates with the thermal engine MAP. The coolant flows through the cylinder head water jacket and the cylinder block water jacket and is divided into four paths through the thermal management module. The coolant flows in parallel through the exhaust throttle valve and the air compressor and is divided into four paths through the thermal management module. The first path passes through the urea heater and returns to the electronically controlled water pump, the second path passes through the fuel tank heater and returns to the electronically controlled water pump, the third path passes through the warm air heater and returns to the electronically controlled water pump, the fourth path passes through the third valve and the first bypass line, passes through the radiator and returns to the electronically controlled water pump, and the coolant output from the cylinder head water jacket also passes through the oil cooler and the first valve and enters the thermal management module.

[0023] Optionally, controlling the operation of the thermal management module based on the engine operating conditions, coolant temperature, and the rotation angle of the rotary ball valve to cause the coolant to circulate in the thermal management system through different circulation modes also includes:

[0024] When the engine is operating in a hot engine condition and the retarder is working, and the rotation angle θ of the rotary ball valve satisfies 120°≤θ<180°, the third valve and the fourth valve are in a closed state, and the first valve and the second valve are in a gradually opened state. The opening angles of the first valve and the second valve are adjusted according to the ambient temperature, coolant temperature and operating condition calibration parameters. The electronically controlled water pump operates in a hot engine MAP. The coolant flows through the cylinder head water jacket and the cylinder block water jacket and is divided into four paths through the thermal management module. The coolant flows in parallel through the exhaust throttle valve and the air compressor and is divided into four paths through the thermal management module. The first path passes through the urea heater and returns to the electronically controlled water pump. The second path passes through the fuel tank heater and returns to the electronically controlled water pump. The third path passes through the warm air heater and returns to the electronically controlled water pump. The fourth path passes through the second valve and the retarder and returns to the electronically controlled water pump through the radiator. The coolant output from the cylinder head water jacket also passes through the oil cooler and the first valve and enters the thermal management module.

[0025] Optionally, controlling the operation of the thermal management module based on the engine operating conditions, coolant temperature, and the rotation angle of the rotary ball valve to cause the coolant to circulate in the thermal management system through different circulation modes also includes:

[0026] When the engine is in a flameout and power-off state, the rotation angle of the rotary ball valve is controlled to be in a 170° rotation angle state, the third valve and the fourth valve are in a closed state, and the first valve and the second valve are in a fully open state.

[0027] Optionally, controlling the operation of the thermal management module based on the engine operating conditions, coolant temperature, and the rotation angle of the rotary ball valve to cause the coolant to circulate in the thermal management system through different circulation modes also includes:

[0028] Coolant temperature T mot Meet T mot When the temperature is >105℃ and lasts for the preset time, the thermal management system is determined to be failed. Before the alarm is issued, the angle of the rotary ball valve is adjusted to 110°, and the second valve and the fourth valve are controlled to be in the closed state, and the first valve and the third valve are in the fully open state.

[0029] According to a third aspect of the present invention, an engine is provided, comprising the thermal management system provided by the first aspect.

[0030] According to a fourth aspect of the present invention, a vehicle is provided, comprising the engine provided by the third aspect.

[0031] The technical solution of the embodiment of the present invention is to provide an electronically controlled water pump, a thermal management module, an engine body assembly, a heater assembly and a radiator assembly, and utilize the rotary ball valve in the thermal management module in combination with the coolant temperature to control the coolant circulation through different circulation modes in the thermal management system, thereby realizing precise control of the engine temperature and the engine coolant flow, which can achieve both rapid warm-up and high-temperature protection.

[0032] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 A connection diagram of a thermal management system provided by an embodiment of the present invention;

[0035] Figure 2 A flow chart of a control method for a first thermal management system provided by an embodiment of the present invention;

[0036] Figure 3 A flow chart of a control method for a second thermal management system provided by an embodiment of the present invention;

[0037] Figure 4 A relationship diagram of a rotation angle, water flow rate, and circulation mode provided in an embodiment of the present invention;

[0038] Figure 5 A flow chart of a control method for a third thermal management system provided by an embodiment of the present invention;

[0039] Figure 6 A flow chart of a control method for a fourth thermal management system provided by an embodiment of the present invention;

[0040] Figure 7 A relationship diagram of engine speed, engine load and water temperature range provided by an embodiment of the present invention;

[0041] Figure 8 A flow chart of a fifth control method for a thermal management system provided by an embodiment of the present invention;

[0042] Figure 9 A flow chart of a control method for a sixth thermal management system provided by an embodiment of the present invention;

[0043] Figure 10 This is a flow chart of a seventh control method for a thermal management system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0045] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0046] Figure 1 A connection diagram of a thermal management system provided by an embodiment of the present invention is shown in FIG. Figure 1 As shown, the thermal management system includes: an electronically controlled water pump 1, a thermal management module 2, an engine body component 3, a heater component 4 and a radiator component 5;

[0047] The output end of the electronically controlled water pump 1 is connected to the input end of the engine body assembly 3, the output end of the engine body assembly 3 is connected to the input end of the thermal management module 2, the first output end of the thermal management module 2 is connected to the input end of the heater assembly 4, the output end of the heater assembly 4 is connected to the input end of the electronically controlled water pump 1, the second output end of the thermal management module 2 is connected to the input end of the radiator assembly 5, and the output end of the radiator assembly 5 is connected to the input end of the electronically controlled water pump 1;

[0048] The thermal management module 2 includes a rotary ball valve, which controls the coolant to circulate through different circulation modes in the thermal management system according to different coolant temperatures and the rotation angle of the rotary ball valve.

[0049] The electronically controlled water pump 1 is a component that drives the engine coolant through the pipeline. The engine body assembly 3 is a component involved in engine cooling and operation. The heater assembly 4 is a component in the vehicle system that requires heating, such as a heater or fuel tank heater. The radiator assembly 5 is a component that dissipates heat from the engine coolant.

[0050] The output of the electronically controlled water pump 1 is connected to the input of the engine assembly 3, allowing the engine coolant to be pumped through the electronically controlled water pump 1 and passed through the engine assembly 3 to exchange heat with the engine assembly 3. The output of the engine assembly 3 is connected to the input of the thermal management module 2, allowing the heat-exchanged engine coolant to enter the thermal management module 2. The thermal management module 2 includes a first output and a second output. The first output is connected to the input of the heater assembly 4, allowing the heat-exchanged engine coolant to flow through the heater assembly 4 for heat exchange. This transfers heat generated by the engine assembly 3 to the heater assembly 4, assisting in heating the heater assembly 4 and achieving a rapid temperature rise. The second output is connected to the input of the radiator assembly 5, allowing the heat-exchanged engine coolant to flow through the radiator assembly 5 for heat dissipation, ensuring effective cooling of the engine coolant. The output of the radiator assembly 5 is connected to the input of the electronically controlled water pump 1, allowing the heat-exchanged engine coolant to continue circulating to the electronically controlled water pump 1 for continuous heat exchange with the engine assembly.

[0051] The rotary ball valve can control the flow of engine coolant by rotating the ball. Different rotation angles of the rotary ball valve can control different flow paths of the engine coolant, thereby controlling the engine coolant to circulate through different circulation modes.

[0052] For example, when the engine is just started, the operating condition is in the warm-up state, and the coolant temperature is low. Rapid warm-up is required, and the angle of the rotary ball valve is controlled so that the first output end is conductively connected to the input end of the heater assembly 4, and the second output end is closed to the input end of the radiator assembly 5. This allows all heat to participate in preheating and heating, and is not dissipated to the environment through the radiator assembly 5, thereby achieving rapid warm-up. When the engine is running stably, the operating condition is in the hot state, and the coolant temperature is high. Heat dissipation protection is required, and the angle of the rotary ball valve is controlled so that the second output end is conductively connected to the input end of the radiator assembly 5, thereby achieving heat dissipation of the engine coolant and achieving rapid heat dissipation.

[0053] It is understandable that the rotation angle of the rotary ball valve in the embodiment of the present invention can be determined according to different coolant temperatures, thereby controlling the coolant to circulate through different circulation modes in the thermal management system.

[0054] The technical solution of the embodiment of the present invention is to provide an electronically controlled water pump, a thermal management module, an engine body assembly, a heater assembly and a radiator assembly, and utilize the rotary ball valve in the thermal management module in combination with the coolant temperature to control the coolant circulation through different circulation modes in the thermal management system, thereby realizing precise control of the engine temperature and the engine coolant flow, which can achieve both rapid warm-up and high-temperature protection.

[0055] Optional, continue to refer to Figure 1 As shown, the thermal management module 2 further includes a first valve S1, and the engine body assembly 3 includes a cylinder head water jacket 31, a cylinder block water jacket 32, an oil cooler 33, an exhaust throttle valve 34 and an air compressor 35;

[0056] The input end of the cylinder head water jacket 31 is connected to the output end of the electronically controlled water pump 1, the input ends of the cylinder block water jacket 32 and the oil cooler 33 are both connected to the output end of the cylinder head water jacket 31, the output end of the cylinder block water jacket 32 is connected to the thermal management module 2, the output end of the oil cooler 33 is connected to the thermal management module 2 through the first valve S1, the input end of the exhaust throttle valve 34 is connected to the output end of the electronically controlled water pump 1, the output end of the exhaust throttle valve 34 is connected to the thermal management module 2, the input end of the air compressor 35 is connected to the input end of the electronically controlled water pump 1, and the output end of the air compressor 35 is connected to the thermal management module 2.

[0057] The cylinder water jacket 32 can be used to participate in the cooling cycle of the engine, warming up the engine and dissipating heat. The cylinder head water jacket 31 can be a part of the cylinder head cooling system, and cooperates with the cylinder water jacket 32 to form the cooling system of the engine.

[0058] The oil cooler 33 can be a device for accelerating the heat dissipation of the oil. The air compressor 35 can be used for gas compression. The exhaust throttle valve 34 can be used for regulating the exhaust flow rate.

[0059] Specifically, the input of the cylinder head water jacket 31 is connected to the output of the electronically controlled water pump 1, while the inputs of the cylinder block water jacket 32 and the oil cooler 33 are both connected to the output of the cylinder head water jacket 31. This allows the engine coolant in the electronically controlled water pump 1 to preferentially enter the cylinder head water jacket 31, and then enter the cylinder block water jacket 32 and the oil cooler 33. The output of the cylinder block water jacket 32 is connected to the thermal management module 2, allowing the engine coolant, after heat exchange in the cylinder block water jacket 32, to enter the thermal management module 2. The output of the oil cooler 33 is connected to the thermal management module 2 via a first valve S1, which controls the amount of engine coolant that passes through the oil cooler 33 and enters the thermal management module 2. The input of exhaust throttle valve 34 is connected to the output of electronically controlled water pump 1, and the input of air compressor 35 is connected to the input of electronically controlled water pump 1. This allows engine coolant passing through electronically controlled water pump 1 to preferentially enter exhaust throttle valve 34 and air compressor 35 for heat exchange, ensuring the proper functioning of exhaust throttle valve 34 and air compressor 35. The output of exhaust throttle valve 34 and air compressor 35 are connected to thermal management module 2, and the output of air compressor 35 is connected to thermal management module 2. After heat exchange, the engine coolant enters thermal management module 2.

[0060] It can be understood that the technical solution of the embodiment of the present invention utilizes the electronically controlled water pump 1 to preferentially direct the engine coolant into the cylinder head water jacket 31 with a higher cooling demand, and then into the cylinder body water jacket 32. While ensuring a lower water temperature entering the cylinder head water jacket 31, it reduces the system water flow, reduces the system heat transfer loss and the cooling accessory shaft work, and improves fuel economy.

[0061] The technical solution of the embodiment of the present invention is to set up an engine body component including a cylinder head water jacket, a cylinder block water jacket, an oil cooler, an exhaust throttle valve and an air compressor, so that the cylinder head water jacket, the exhaust throttle valve and the air compressor are preferentially passed through the electronically controlled water pump, thereby ensuring the cooling requirements of the cylinder head water jacket, the exhaust throttle valve and the air compressor, while reducing the system water flow, reducing the system heat transfer loss and the cooling accessory shaft work, and improving fuel economy.

[0062] Optional, continue to refer to Figure 1 As shown, the heater assembly 4 includes a urea heater 41, a fuel tank heater 42 and a warm air heater 43. The input ends of the urea heater 41, the fuel tank heater 42 and the warm air heater 43 are all connected to the thermal management module 2, and the output ends of the urea heater 41, the fuel tank heater 42 and the warm air heater 43 are all connected to the input end of the electronically controlled water pump 1.

[0063] The heater assembly 4 includes a urea heater 41, a fuel tank heater 42, and a warm air heater 43. The input ends of the urea heater 41, the fuel tank heater 42, and the warm air heater 43 are all connected to the thermal management module 2, so that the engine coolant after heat exchange can pass through the urea heater 41, the fuel tank heater 42, and the warm air heater 43, respectively, and the heat in the engine coolant is transferred to the urea heater 41, the fuel tank heater 42, and the warm air heater 43, achieving heat recovery and facilitating the rapid warm-up of the urea heater 41, the fuel tank heater 42, and the warm air heater 43. At the same time, the output ends of the urea heater 41, the fuel tank heater 42, and the warm air heater 43 are all connected to the input end of the electronically controlled water pump 1, so that the engine coolant after heat exchange continues to circulate to cool the engine body assembly 3.

[0064] The technical solution of the embodiment of the present invention is to set up a heater assembly including a urea heater, a fuel tank heater and a warm air heater, so that the engine coolant after heat exchange through the engine body assembly can enter the heater assembly for heat recovery, thereby achieving rapid warm-up and improving system energy utilization.

[0065] Optional, continue to refer to Figure 1 As shown, the thermal management module 2 further includes a second valve S2, a third valve S3 and a fourth valve S4, and the radiator assembly 5 includes a retarder 51, a first bypass line 52, a second bypass line 53 and a radiator 54;

[0066] The input end of the retarder 51 is connected to the thermal management module 2 through the second valve S2, the output end of the retarder 51 is connected to the input end of the radiator 54, the output end of the radiator 54 is connected to the input end of the electronically controlled water pump 1, the input end of the first bypass line 52 is connected to the thermal management module 2 through the third valve S3, the output end of the first bypass line 52 is connected to the input end of the radiator 54, the input end of the second bypass line 53 is connected to the thermal management module 2 through the fourth valve S4, and the output end of the second bypass line 53 is connected to the input end of the electronically controlled water pump 1.

[0067] The retarder 51 may be a component that assists in vehicle braking. For example, when descending a steep slope, the retarder 51 needs to be activated and cooled after activation. Therefore, the input end of the retarder 51 is connected to the thermal management module 2 via a second valve S2, and the output end of the retarder 51 is connected to the input end of the radiator 54. By opening the second valve S2, the engine coolant can flow through the retarder 51 to cool and dissipate heat.

[0068] The radiator 54 dissipates heat from the engine coolant. The input of the first bypass line 52 is connected to the thermal management module 2 via a third valve S3, while the output of the first bypass line 52 is connected to the input of the radiator 54. Opening the third valve S3 allows the engine coolant to enter the radiator 54 for heat dissipation. The input of the second bypass line 53 is connected to the thermal management module 2 via a fourth valve S4, while the output of the second bypass line 53 is connected to the input of the electronically controlled water pump 1. Opening the fourth valve S4 allows the engine coolant in the thermal management module 2 to be directly transferred to the electronically controlled water pump 1 for continued circulation.

[0069] It can be understood that the opening and closing of the first valve S1, the second valve S2, the third valve S3 and the fourth valve S4 can be determined in combination with the engine operating conditions and the engine coolant temperature, thereby achieving precise control of the engine temperature and flow, realizing rapid warm-up, increasing the oil temperature at low load and high water temperature, reducing friction work, reducing the water temperature at high load, optimizing combustion, improving system cooling to avoid overheating, and taking into account high-temperature protection conditions, thereby reducing the risk of failure due to engine overheating to a certain extent.

[0070] The technical solution of the embodiment of the present invention can be applied to vehicles equipped with a hydraulic retarder. By adding a retarder stop valve (second valve S2), the cooling and heat recovery of the hydraulic retarder are taken into account. When the hydraulic retarder is not working, the capacity of the circulating water is reduced, thereby achieving a rapid temperature rise of a large-displacement and high-efficiency engine.

[0071] Optional, continue to refer to Figure 1 As shown, an expansion water tank 6 is also included. The input ends of the thermal management module 2 and the radiator 54 are both connected to the input end of the expansion water tank 6 , and the output end of the expansion water tank 6 is connected to the input end of the electronically controlled water pump 1 .

[0072] Among them, the expansion water tank 6 can be used to store coolant, the input ends of the thermal management module 2 and the radiator 54 are both connected to the input end of the expansion water tank 6, and the output end of the expansion water tank 6 is connected to the input end of the electronically controlled water pump 1, so that the coolant in the expansion water tank 6 can circulate in the thermal management system, thereby improving the thermal management efficiency.

[0073] Based on the same inventive concept, Figure 2 A flow chart of a control method for a first thermal management system provided by an embodiment of the present invention, combined with Figure 1 and Figure 2 As shown, an embodiment of the present invention further provides a control method for a thermal management system, which is applicable to the thermal management system of the above embodiment. The control method for the thermal management system includes:

[0074] S10: Obtain engine operating conditions, coolant temperature, and the rotation angle of the rotary ball valve.

[0075] Engine operating conditions include warm-up, hot-start, and power-off. Different engine operating conditions present different thermal management requirements. Coolant temperature is monitored in real time using a temperature sensor.

[0076] The rotation angle range of the rotary ball valve can be 0°-180°. Different rotation angles of the rotary ball valve lead to different flow paths of the engine coolant, thereby controlling the engine coolant to circulate through different circulation modes.

[0077] S11. Control the operation of the thermal management module according to the engine operating condition, coolant temperature, and the rotation angle of the rotary ball valve, so that the coolant circulates through different circulation modes in the thermal management system.

[0078] For example, when the engine is in the warm-up state and the coolant temperature is low, rapid warm-up is required. The ball valve is then controlled to connect the first output end to the input end of the heater assembly 4 and close the second output end to the input end of the radiator assembly 5. This allows all heat to be used for preheating and heating, achieving rapid warm-up. When the engine is in the hot state and the coolant temperature is high, heat dissipation protection is required. The ball valve is then controlled to connect the second output end to the input end of the radiator assembly 5, dissipating heat from the engine coolant and achieving rapid heat dissipation.

[0079] The technical solution of the embodiment of the present invention obtains the engine operating conditions, coolant temperature and the rotation angle of the rotary ball valve, and controls the operation of the thermal management module according to the engine operating conditions, coolant temperature and the rotation angle of the rotary ball valve, so that the coolant circulates through different circulation modes in the thermal management system, thereby realizing precise control of the engine temperature and engine coolant flow, which can achieve both rapid warm-up and high-temperature protection.

[0080] Based on the above embodiments, Figure 3 A flow chart of a control method for a second thermal management system provided by an embodiment of the present invention, combined with Figure 1 and Figure 3 As shown, the thermal management module 2 includes a first valve S1, a second valve S2, a third valve S3 and a fourth valve S4; the engine body assembly 3 includes a cylinder head water jacket 31, a cylinder block water jacket 32, an oil cooler 33, an exhaust throttle valve 34 and an air compressor 35; the heater assembly 4 includes a urea heater 41, a fuel tank heater 42 and a warm air heater 43; the radiator assembly 5 includes a retarder 51, a first bypass line 52, a second bypass line 53 and a radiator 54. The control method includes:

[0081] S20: Obtain engine operating conditions, coolant temperature, and rotation angle of the rotary ball valve.

[0082] S21, when the engine is in warm-up condition, the coolant temperature Tmot Meet -40℃≤T mot <35°C, when the rotation angle θ of the rotary ball valve satisfies 0≤θ<10°, the first valve, the second valve, the third valve and the fourth valve are in the closed state, the electronically controlled water pump operates in accordance with the engine speed, the coolant flows through the cylinder head water jacket and the cylinder block water jacket and is divided into three paths through the thermal management module, the coolant flows in parallel through the exhaust throttle valve and the air compressor and is divided into three paths through the thermal management module, the first path passes through the urea heater and returns to the electronically controlled water pump, the second path passes through the fuel tank heater and returns to the electronically controlled water pump, and the third path passes through the warm air heater and returns to the electronically controlled water pump.

[0083] in, Figure 4 A diagram showing the relationship between the angle, water flow and circulation mode provided by an embodiment of the present invention, combined with Figure 1 、 Figure 3 and Figure 4 As shown in the figure, when the engine is in warm-up condition, the coolant temperature T mot Meet -40℃≤T mot <35°C, the coolant temperature is low, and the rotation angle θ of the rotary ball valve satisfies 0≤θ<10°. Rapid warm-up is required at this time, so the first valve S1, the second valve S2, the third valve S3, and the fourth valve S4 are closed, allowing the coolant passing through the electronically controlled water pump 1 to flow through the cylinder head water jacket 31 and the cylinder block water jacket 32 before entering the thermal management module 2. The coolant passing through the electronically controlled water pump 1 then passes through the exhaust throttle valve 34 and the air compressor 35 before entering the thermal management module 2. Since the first valve S1, the second valve S2, the third valve S3, and the fourth valve S4 are closed, all the coolant in the thermal management module 2 flows into the heater assembly 4, that is, it is divided into three paths and enters the urea heater 41, the fuel tank heater 42, and the warm air heater 43 for preheating and heat exchange. The coolant first enters the engine body assembly 3 for heat exchange to cool the engine body assembly 3, and then enters the heater assembly 4 for heat exchange, and transfers the heat to the heater assembly 4 to preheat the heater assembly 4, ensuring that all the heat in the coolant is involved in preheating and heating. The warm air heater 43 quickly rises in temperature to improve user comfort, and quickly preheats the urea heater 41 and the fuel tank heater 42, synchronously achieving a rapid temperature rise in the metal temperature, oil temperature, and exhaust temperature of the internal combustion engine, thereby improving fuel consumption and emissions.

[0084] According to the technical solution of the embodiment of the present invention, when the engine is in the warm-up condition, the coolant temperature is low, and the rotation angle of the rotary ball valve is at a small angle, the thermal management module is controlled to use all the heat in the coolant for preheating and heating, thereby achieving the purpose of rapid microcirculation warm-up.

[0085] Based on the above embodiments, Figure 5 A flow chart of a control method for a third thermal management system provided by an embodiment of the present invention, combined with Figure 1 、 Figure 4 and Figure 5 As shown, the control method includes:

[0086] S30: Obtain engine operating conditions, coolant temperature, and rotation angle of the rotary ball valve.

[0087] S31, when the engine is in warm-up condition, the coolant temperature T mot Meet -40℃≤T mot <35°C, when the rotation angle θ of the rotary ball valve satisfies 0≤θ<10°, the first valve, the second valve, the third valve and the fourth valve are in the closed state, the electronically controlled water pump operates in accordance with the engine speed, the coolant flows through the cylinder head water jacket and the cylinder block water jacket and is divided into three paths through the thermal management module, the coolant flows in parallel through the exhaust throttle valve and the air compressor and is divided into three paths through the thermal management module, the first path passes through the urea heater and returns to the electronically controlled water pump, the second path passes through the fuel tank heater and returns to the electronically controlled water pump, and the third path passes through the warm air heater and returns to the electronically controlled water pump.

[0088] S32, when the engine is in the warm-up state, the coolant temperature T mot Meet -70℃≤T mot <85℃, when the rotation angle θ of the rotary ball valve satisfies 10°≤θ<60°, the first valve, the second valve and the third valve are in the closed state, and the fourth valve is in the open state. The fourth valve adjusts the opening angle according to the calibration parameters of the coolant temperature operating condition. The electronically controlled water pump operates with the warm engine MAP. The coolant flows through the cylinder head water jacket and the cylinder block water jacket and is divided into three paths through the thermal management module. The coolant flows in parallel through the exhaust throttle valve and the air compressor and is divided into four paths through the thermal management module. The first path passes through the urea heater and returns to the electronically controlled water pump, the second path passes through the fuel tank heater and returns to the electronically controlled water pump, the third path passes through the warm air heater and returns to the electronically controlled water pump, and the fourth path passes through the second bypass pipe and flows back to the electronically controlled water pump.

[0089] Among them, the warm-up MAP can be pre-calibrated. When the engine is in the warm-up condition, the coolant temperature T mot Meet -70℃≤T mot<85°C, when the rotation angle θ of the rotary ball valve satisfies 10°≤θ<60°, the rotation angle θ is greater than 10°, and the engine is in a high-load condition. It is necessary to increase the coolant flow through the cylinder head water jacket 31 to avoid local boiling cavitation and abnormal temperature sensing of the temperature sensor. At this time, the fourth valve S4 in the thermal management module 2 is opened, so that the coolant enters the thermal management module 2 and is divided into four paths. The first path passes through the urea heater 41 and returns to the electronically controlled water pump 1. The second path passes through the fuel tank heater 42 and returns to the electronically controlled water pump 1. The third path passes through the warm air heater 43 and returns to the electronically controlled water pump 1. The fourth path passes through the second bypass pipe 53 and flows back to the electronically controlled water pump 1, realizing the small circulation of the coolant and avoiding the micro-circulation water circuit affecting the engine reliability. The water circuit control is adjusted according to the load water temperature to ensure reliability while reducing the flow as much as possible, reducing heat transfer loss, accelerating temperature rise, and improving economy.

[0090] According to the technical solution of the embodiment of the present invention, when the engine is in a warm-up condition and a high-load condition, the fourth valve is opened to realize a small circulation operation, thereby preventing the microcirculation water circuit from affecting the reliability of the engine. The water circuit control is adjusted according to the load water temperature to ensure reliability while reducing the flow rate as much as possible, reducing heat transfer losses, accelerating temperature rise, and improving economy.

[0091] Based on the above embodiments, Figure 6 A flow chart of a control method for a fourth thermal management system provided by an embodiment of the present invention, combined with Figure 1 、 Figure 4 and Figure 6 As shown, the control method includes:

[0092] S40: Obtain engine operating conditions, coolant temperature, and rotation angle of the rotary ball valve.

[0093] S41, when the engine is in warm-up condition, the coolant temperature T mot Meet -40℃≤T mot <35°C, when the rotation angle θ of the rotary ball valve satisfies 0≤θ<10°, the first valve, the second valve, the third valve and the fourth valve are in the closed state, the electronically controlled water pump operates in accordance with the engine speed, the coolant flows through the cylinder head water jacket and the cylinder block water jacket and is divided into three paths through the thermal management module, the coolant flows in parallel through the exhaust throttle valve and the air compressor and is divided into three paths through the thermal management module, the first path passes through the urea heater and returns to the electronically controlled water pump, the second path passes through the fuel tank heater and returns to the electronically controlled water pump, and the third path passes through the warm air heater and returns to the electronically controlled water pump.

[0094] S42, when the engine operating condition is the hot engine condition, the coolant temperature T mot Meet T mot≥85℃, when the angle θ of the rotary ball valve satisfies 60°≤θ<120°, the second valve and the fourth valve are in the closed state, and the first valve and the third valve are in the gradually opened state. The opening angles of the first valve and the third valve are adjusted according to the ambient temperature, coolant temperature and working condition calibration parameters, and the electronically controlled water pump works at the thermal engine MAP. Figure 7 The embodiment of the present invention provides a relationship diagram of engine speed, engine load and water temperature area. The thermal engine MAP can be as follows: Figure 7 As shown, the specific calibration can be pre-set. After flowing through the cylinder head water jacket and the cylinder block water jacket, the coolant is divided into four paths by the thermal management module. The coolant flows in parallel through the exhaust throttle valve and the air compressor, and then is divided into four paths by the thermal management module. The first path passes through the urea heater and returns to the electronically controlled water pump. The second path passes through the fuel tank heater and returns to the electronically controlled water pump. The third path passes through the heater and returns to the electronically controlled water pump. The fourth path passes through the third valve and the first bypass line, passes through the radiator, and returns to the electronically controlled water pump. The coolant output from the cylinder head water jacket also passes through the oil cooler and the first valve before entering the thermal management module.

[0095] Among them, when the engine working condition is the hot engine working condition, the coolant temperature T mot Meet T mot ≥85℃, the radiator 54 is required for heat dissipation, the rotation angle θ of the rotary ball valve satisfies 60°≤θ<120°, the first valve S1 and the third valve S3 are opened, and the opening angles of the first valve S1 and the third valve S3 are adjusted according to the ambient temperature, coolant temperature and working condition calibration parameters, the oil cooler 33 is opened to cool the oil to avoid reliability risks such as coking caused by overheating of the oil, and at the same time, the coolant passing through the electronically controlled water pump 1 enters the oil cooler 33 for heat exchange and then enters the thermal management module 2. The coolant entering the thermal management module 2 is divided into four paths, the first path passes through the urea heater 41 and returns to the electronically controlled water pump 1, the second path passes through the fuel tank to add The heat sink 42 returns to the electronically controlled water pump 1, the third route passes through the warm air heater 43 and returns to the electronically controlled water pump 1, and the fourth route passes through the third valve S3 and the first bypass pipe 52 and the radiator 54 and returns to the electronically controlled water pump 1, realizing a small cycle closed and large cycle working mode to avoid the coolant temperature being too high to affect the engine reliability. At the same time, considering the water temperature rising, the hot engine state, and the gradual increase in the oil temperature, the system opens the oil cooling branch to cool the oil to avoid reliability risks such as coking caused by overheating of the oil. The entire water circuit control is adjusted according to the load water temperature to ensure reliability while reducing the flow as much as possible, reducing heat transfer loss, accelerating temperature rise, and improving economy.

[0096] In some embodiments, when the engine operating state is a shutdown power-down state or the coolant temperature T mot Meet T mot When the temperature is less than 75℃, the engine warm-up strategy is re-executed. mot Meet T motThe warm-up strategy is entered when the temperature is ≤75℃ because it is necessary to ensure a smooth transition of the angle θ of the rotary ball valve so that T mot ≥85℃ and T mot There should be at least a 10°C difference between temperatures ≤75°C, enabling precise control between strategies.

[0097] The technical solution of the embodiment of the present invention is that when the engine working condition is a hot engine working condition, the coolant temperature T mot Meet T mot ≥85℃, the radiator 54 is required for heat dissipation, the rotation angle θ of the rotary ball valve satisfies 60°≤θ<120°, and the first valve S1 and the third valve S3 are opened to realize the small cycle closing and large cycle working mode to avoid the coolant temperature being too high to affect the engine reliability. At the same time, considering the water temperature rising, the hot engine state, and the gradual increase in oil temperature, the system opens the oil cooling branch to cool the oil to avoid reliability risks such as coking caused by oil overheating. The entire water circuit control is adjusted according to the load water temperature to ensure reliability while reducing the flow as much as possible, reducing heat transfer loss, accelerating temperature rise, and improving economy.

[0098] Based on the above embodiments, Figure 8 A flow chart of a fifth thermal management system control method provided by an embodiment of the present invention, combined with Figure 1 and Figure 8 As shown, the control method includes:

[0099] S50: Obtain engine operating conditions, coolant temperature, and rotation angle of the rotary ball valve.

[0100] S51, when the engine is in the warm-up state, the coolant temperature T mot Meet -40℃≤T mot <35°C, when the rotation angle θ of the rotary ball valve satisfies 0≤θ<10°, the first valve, the second valve, the third valve and the fourth valve are in the closed state, the electronically controlled water pump operates in accordance with the engine speed, the coolant flows through the cylinder head water jacket and the cylinder block water jacket and is divided into three paths through the thermal management module, the coolant flows in parallel through the exhaust throttle valve and the air compressor and is divided into three paths through the thermal management module, the first path passes through the urea heater and returns to the electronically controlled water pump, the second path passes through the fuel tank heater and returns to the electronically controlled water pump, and the third path passes through the warm air heater and returns to the electronically controlled water pump.

[0101] S52. When the engine is operating in a hot engine condition and the retarder is operating, and the rotation angle θ of the rotary ball valve satisfies 120°≤θ<180°, the third valve and the fourth valve are closed, and the first valve and the second valve are gradually opened. The opening angles of the first valve and the second valve are adjusted according to the ambient temperature, the coolant temperature, and the operating condition calibration parameters. The electronically controlled water pump operates in a hot engine MAP. The coolant flows through the cylinder head water jacket and the cylinder block water jacket, and is then divided into four paths by the thermal management module. The coolant flows in parallel through the exhaust throttle valve and the air compressor, and is then divided into four paths by the thermal management module. The first path passes through the urea heater and returns to the electronically controlled water pump. The second path passes through the fuel tank heater and returns to the electronically controlled water pump. The third path passes through the warm air heater and returns to the electronically controlled water pump. The fourth path passes through the second valve and the retarder, and then through the radiator and returns to the electronically controlled water pump. The coolant output from the cylinder head water jacket also passes through the oil cooler and the first valve and enters the thermal management module.

[0102] Among them, when the vehicle type equipped with the retarder 51 is in a downhill steep slope condition, the retarder 51 needs to be started. At this time, the engine condition is a hot engine condition, and the rotation angle θ of the rotary ball valve satisfies 120°≤θ<180°. The retarder 51 needs to be cooled. At this time, the first valve S1 and the second valve S2 are gradually opened to cool the oil cooler 33. At the same time, a part of the coolant entering the thermal management module 2 passes through the fourth path, the second valve S2 and the retarder 51, and the radiator 54 to return to the electronically controlled water pump 1, so that the small cycle is closed, the large cycle and the retarder 51 are working, so as to avoid overheating affecting the reliability of the engine. At the same time, considering the increase in water temperature, the hot engine state, and the gradual increase in oil temperature, the system opens the oil cooling branch to cool the oil to avoid reliability risks such as coking caused by oil overheating. The entire water channel control is adjusted according to the load water temperature to ensure reliability while reducing the flow as much as possible, reducing heat transfer loss, accelerating temperature rise, and improving economy.

[0103] The technical solution of the embodiment of the present invention is to control the first valve and the second valve to be in a gradually open state when the engine operating condition is a hot engine condition and the retarder is working, and the rotation angle θ of the rotary ball valve satisfies 120°≤θ<180°, thereby achieving cooling of the engine while taking into account the cooling of the hydraulic retarder.

[0104] Based on the above embodiments, Figure 9 A flow chart of a control method for a sixth thermal management system provided by an embodiment of the present invention, combined with Figure 1 、 Figure 4 and Figure 9 As shown, the control method includes:

[0105] S60: Obtain engine operating conditions, coolant temperature, and rotation angle of the rotary ball valve.

[0106] S61, when the engine is in warm-up condition, the coolant temperature T mot Meet -40℃≤Tmot <35°C, when the rotation angle θ of the rotary ball valve satisfies 0≤θ<10°, the first valve, the second valve, the third valve and the fourth valve are in the closed state, the electronically controlled water pump operates in accordance with the engine speed, the coolant flows through the cylinder head water jacket and the cylinder block water jacket and is divided into three paths through the thermal management module, the coolant flows in parallel through the exhaust throttle valve and the air compressor and is divided into three paths through the thermal management module, the first path passes through the urea heater and returns to the electronically controlled water pump, the second path passes through the fuel tank heater and returns to the electronically controlled water pump, and the third path passes through the warm air heater and returns to the electronically controlled water pump.

[0107] S62. When the engine operating condition is the flameout and power-off condition, the rotation angle of the rotary ball valve is controlled to be in a 170° rotation angle state, the third valve and the fourth valve are in a closed state, and the first valve and the second valve are in a fully open state.

[0108] Among them, when the engine is in the flameout and power-off state, the angle of the rotary ball valve is controlled to be in a 170° rotation state and return to the specified angle to ensure that the system is in a large circulation and the retarder 51 is in a working state, so as to avoid the ball valve from being unable to continue working due to electrical or jamming faults in the next operation, thereby affecting the reliability of the entire machine.

[0109] Based on the above embodiments, Figure 10 A flow chart of a seventh control method for a thermal management system provided by an embodiment of the present invention, combined with Figure 1 and Figure 10 As shown, the control method includes:

[0110] S70: Obtain engine operating conditions, coolant temperature, and rotation angle of the rotary ball valve.

[0111] S71, when the engine is in the warm-up state, the coolant temperature T mot Meet -40℃≤T mot <35°C, when the rotation angle θ of the rotary ball valve satisfies 0≤θ<10°, the first valve, the second valve, the third valve and the fourth valve are in the closed state, the electronically controlled water pump operates in accordance with the engine speed, the coolant flows through the cylinder head water jacket and the cylinder block water jacket and is divided into three paths through the thermal management module, the coolant flows in parallel through the exhaust throttle valve and the air compressor and is divided into three paths through the thermal management module, the first path passes through the urea heater and returns to the electronically controlled water pump, the second path passes through the fuel tank heater and returns to the electronically controlled water pump, and the third path passes through the warm air heater and returns to the electronically controlled water pump.

[0112] S72, coolant temperature T mot Meet T mot When the temperature is >105℃ and lasts for the preset time, the thermal management system is determined to be failed. Before the alarm is issued, the angle of the rotary ball valve is adjusted to 110°, and the second valve and the fourth valve are controlled to be in the closed state, and the first valve and the third valve are in the fully open state.

[0113] Among them, when the coolant temperature T mot Meet T mot When the temperature is >105℃ and lasts for the preset time, it means that the coolant temperature is too high and there is a risk of affecting the normal operation of the system. At this time, the thermal management system is judged to have failed and an alarm reminder from the thermal management system is required. The preset time can be calibrated in combination with the working conditions, for example, it can be 5s. Since it takes time for the staff to be reminded to give feedback, the angle of the rotary ball valve is adjusted to 110° before the alarm, and the second valve S2 and the fourth valve S4 are controlled to be in the closed state, and the first valve S1 and the third valve S3 are in the fully open state, so that the coolant flow through the radiator 54 is maximized, ensuring maximum heat dissipation for the coolant, reducing the risk of continuous increase in the coolant temperature, and ensuring the stable operation of the thermal management system.

[0114] Based on the same inventive concept, embodiments of the present invention also provide an engine including the thermal management system provided in the aforementioned embodiments. The technical solutions of these embodiments are applicable to heavy-duty internal combustion engines, including diesel and natural gas engines, achieving the goals of rationally applying energy to reduce shaft work, rationally controlling temperature to improve combustion, and reducing frictional work.

[0115] Based on the same inventive concept, an embodiment of the present invention further provides a vehicle, including an engine.

[0116] The technical solution of the embodiments of the present invention is applicable to heavy-load internal combustion engines such as diesel engines and natural gas engines. By using a rotary ball valve and an electronically controlled water pump, precise control of engine temperature and flow rates in various pipelines can be achieved for rapid warm-up. High water temperature at low loads increases oil temperature, reducing friction work, while low water temperature at high loads reduces combustion, improves system cooling and avoids overheating. At the same time, high-temperature protection is taken into account, thereby reducing the risk of engine failure due to overheating to a certain extent. For models using a hydraulic retarder, without changing the existing model schematic, the flow distribution valve is used to balance the cooling and heat recovery of the hydraulic retarder. When the hydraulic retarder is not operating, the flow distribution valve is closed to short-circuit the hydraulic retarder, ensuring minimal system pressure loss and more reasonable flow distribution. At the same time, the thermal management system architecture changes from the traditional down-to-top water jacket structure to a top-to-down water jacket structure, allowing all coolant to enter the cylinder head, which has higher cooling requirements, and then enter the cylinder block. While ensuring a lower cylinder head inlet water temperature, the system water flow is reduced, reducing system heat transfer losses and cooling accessory shaft work, thereby improving fuel economy.

[0117] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A thermal management system, characterized in that: Includes electronically controlled water pump, thermal management module, engine body assembly, heater assembly and radiator assembly; The output end of the electronically controlled water pump is connected to the input end of the engine body assembly, the output end of the engine body assembly is connected to the input end of the thermal management module, the first output end of the thermal management module is connected to the input end of the heater assembly, the output end of the heater assembly is connected to the input end of the electronically controlled water pump, the second output end of the thermal management module is connected to the input end of the radiator assembly, and the output end of the radiator assembly is connected to the input end of the electronically controlled water pump; The thermal management module includes a rotary ball valve, which controls the coolant to circulate in the thermal management system through different circulation modes according to different coolant temperatures and rotation angles of the rotary ball valve.

2. The thermal management system according to claim 1, characterized in that The thermal management module further includes a first valve, and the engine body assembly includes a cylinder head water jacket, a cylinder block water jacket, an oil cooler, an exhaust throttle valve, and an air compressor; The input end of the cylinder head water jacket is connected to the output end of the electronically controlled water pump, the input ends of the cylinder water jacket and the oil cooler are both connected to the output end of the cylinder head water jacket, the output end of the cylinder water jacket is connected to the thermal management module, the output end of the oil cooler is connected to the thermal management module through the first valve, the input end of the exhaust throttle valve is connected to the output end of the electronically controlled water pump, the output end of the exhaust throttle valve is connected to the thermal management module, the input end of the air compressor is connected to the input end of the electronically controlled water pump, and the output end of the air compressor is connected to the thermal management module.

3. The thermal management system according to claim 1, wherein: The heater assembly includes a urea heater, a fuel tank heater and a warm air heater. The input ends of the urea heater, the fuel tank heater and the warm air heater are all connected to the thermal management module, and the output ends of the urea heater, the fuel tank heater and the warm air heater are all connected to the input end of the electronically controlled water pump.

4. The thermal management system according to claim 1, wherein: The thermal management module further includes a second valve, a third valve, and a fourth valve, and the radiator assembly includes a retarder, a first bypass line, a second bypass line, and a radiator; The input end of the retarder is connected to the thermal management module through the second valve, the output end of the retarder is connected to the input end of the radiator, the output end of the radiator is connected to the input end of the electronically controlled water pump, the input end of the first bypass line is connected to the thermal management module through the third valve, the output end of the first bypass line is connected to the input end of the radiator, the input end of the second bypass line is connected to the thermal management module through the fourth valve, and the output end of the second bypass line is connected to the input end of the electronically controlled water pump.

5. The thermal management system according to claim 4, characterized in that: An expansion water tank is also included. The input ends of the thermal management module and the radiator are both connected to the input end of the expansion water tank, and the output end of the expansion water tank is connected to the input end of the electronically controlled water pump.

6. A control method for a thermal management system, characterized in that: Applicable to the thermal management system according to any one of claims 1 to 5, the control method of the thermal management system comprising: Obtain engine operating conditions, coolant temperature, and the rotation angle of the rotary ball valve; According to the engine operating conditions, the coolant temperature and the rotation angle of the rotary ball valve, the thermal management module is controlled to operate so that the coolant circulates in the thermal management system through different circulation modes.

7. The control method of the thermal management system according to claim 6, characterized in that: The thermal management module includes a first valve, a second valve, a third valve, and a fourth valve; the engine body assembly includes a cylinder head water jacket, a cylinder block water jacket, an oil cooler, an exhaust throttle valve, and an air compressor; the heater assembly includes a urea heater, a fuel tank heater, and a warm air heater; and the radiator assembly includes a retarder, a first bypass line, a second bypass line, and a radiator; Controlling the operation of a thermal management module according to the engine operating condition, the coolant temperature, and the rotation angle of the rotary ball valve so that the coolant circulates in the thermal management system through different circulation modes includes: When the engine is in the warm-up state, the coolant temperature T mot Meet -40℃≤T mot <35°, when the rotation angle θ of the rotary ball valve satisfies 0≤θ<10°, the first valve, the second valve, the third valve and the fourth valve are in a closed state, the electronically controlled water pump operates in accordance with the engine speed, the coolant flows through the cylinder head water jacket and the cylinder block water jacket and is divided into three paths through the thermal management module, the coolant flows in parallel through the exhaust throttle valve and the air compressor and is divided into three paths through the thermal management module, the first path passes through the urea heater and returns to the electronically controlled water pump, the second path passes through the fuel tank heater and returns to the electronically controlled water pump, and the third path passes through the warm air heater and returns to the electronically controlled water pump.

8. The control method of the thermal management system according to claim 7, characterized in that: According to the engine operating condition, the coolant temperature and the rotation angle of the rotary ball valve, the thermal management module is controlled to operate so that the coolant circulates in the thermal management system through different circulation modes, and further includes: When the engine is in the warm-up state, the coolant temperature T mot Meet -70℃≤T mot <85°C, when the rotation angle θ of the rotary ball valve satisfies 10°≤θ<60°, the first valve, the second valve and the third valve are in the closed state, and the fourth valve is in the open state. The opening angle of the fourth valve is adjusted according to the coolant temperature operating condition calibration parameter. The electronically controlled water pump operates with the warm engine MAP, and the coolant flows through the cylinder head water jacket and the cylinder block water jacket and is divided into three paths through the thermal management module. The coolant flows in parallel through the exhaust throttle valve and the air compressor and is divided into four paths through the thermal management module. The first path passes through the urea heater and returns to the electronically controlled water pump, the second path passes through the fuel tank heater and returns to the electronically controlled water pump, the third path passes through the warm air heater and returns to the electronically controlled water pump, and the fourth path passes through the second bypass pipe and flows back to the electronically controlled water pump.

9. The control method of the thermal management system according to claim 7, characterized in that: According to the engine operating condition, the coolant temperature and the rotation angle of the rotary ball valve, the thermal management module is controlled to operate so that the coolant circulates in the thermal management system through different circulation modes, and further includes: When the engine operating condition is a hot engine condition, the coolant temperature T mot Meet T mot ≥85°C, and when the rotation angle θ of the rotary ball valve satisfies 60°≤θ<120°, the second valve and the fourth valve are closed, and the first valve and the third valve are gradually opened. The opening angles of the first valve and the third valve are adjusted according to the ambient temperature, the coolant temperature, and the operating condition calibration parameters. The electronically controlled water pump operates at the thermal engine MAP. The coolant flows through the cylinder head water jacket and the cylinder block water jacket and is divided into four paths through the thermal management module. The coolant flows in parallel through the exhaust throttle valve and the air compressor and is divided into four paths through the thermal management module. The first path passes through the urea heater and returns to the electronically controlled water pump. The second path passes through the fuel tank heater and returns to the electronically controlled water pump. The third path passes through the warm air heater and returns to the electronically controlled water pump. The fourth path passes through the third valve and the first bypass line, passes through the radiator, and returns to the electronically controlled water pump. The coolant output from the cylinder head water jacket also passes through the oil cooler and the first valve and enters the thermal management module.

10. The control method of the thermal management system according to claim 7, characterized in that: According to the engine operating condition, the coolant temperature and the rotation angle of the rotary ball valve, the thermal management module is controlled to operate so that the coolant circulates in the thermal management system through different circulation modes, and further includes: When the engine operating condition is a hot engine condition and the retarder is operating, and the rotation angle θ of the rotary ball valve satisfies 120°≤θ<180°, the third valve and the fourth valve are closed, and the first valve and the second valve are gradually opened. The opening angles of the first valve and the second valve are adjusted according to the ambient temperature, the coolant temperature, and the operating condition calibration parameter. The electronically controlled water pump operates at a hot engine MAP. The coolant flows through the cylinder head water jacket and the cylinder block water jacket and is then divided into four paths by the thermal management module. The coolant flows in parallel through the exhaust throttle valve and the air compressor and is then divided into four paths by the thermal management module. The first path passes through the urea heater and returns to the electronically controlled water pump. The second path passes through the fuel tank heater and returns to the electronically controlled water pump. The third path passes through the warm air heater and returns to the electronically controlled water pump. The fourth path passes through the second valve and the retarder, passes through the radiator, and returns to the electronically controlled water pump. The coolant output from the cylinder head water jacket also passes through the oil cooler and the first valve and enters the thermal management module.

11. The control method of the thermal management system according to claim 7, characterized in that: According to the engine operating condition, the coolant temperature and the rotation angle of the rotary ball valve, the thermal management module is controlled to operate so that the coolant circulates in the thermal management system through different circulation modes, and further includes: When the engine operating condition is the flameout power-off condition, the rotation angle of the rotary ball valve is controlled to be in a 170° rotation angle state, the third valve and the fourth valve are in a closed state, and the first valve and the second valve are in a fully open state.

12. The control method of the thermal management system according to claim 7, characterized in that: According to the engine operating condition, the coolant temperature and the rotation angle of the rotary ball valve, the thermal management module is controlled to operate so that the coolant circulates in the thermal management system through different circulation modes, and further includes: Coolant temperature T mot Meet T mot When the temperature is >105°C and lasts for a preset time, the thermal management system is determined to be failed. Before the alarm is issued, the rotation angle of the rotary ball valve is adjusted to 110°, the second valve and the fourth valve are controlled to be in the closed state, and the first valve and the third valve are controlled to be in the fully open state.

13. An engine, characterized in that: The thermal management system comprises any one of claims 1 to 5.

14. A vehicle, characterized in that: Including the engine described in claim 13.

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