Engine thermal management system and vehicle

Abstract

The present disclosure relates to an engine thermal management system and a vehicle, the engine thermal management system comprising a mechanical water pump, a water jacket, a heater core, a fan, an on-off valve, a heat dissipation component, a controller and a first temperature detection sensor; an outlet end of the mechanical water pump is connected with an inlet of the water jacket, an outlet of the water jacket is connected with the heater core and the heat dissipation component respectively, and the heater core and the heat dissipation component are connected with an inlet end of the mechanical water pump respectively, the on-off valve is connected in a flow path between the heater core and the inlet end of the mechanical water pump; the first temperature detection sensor is used for detecting an ambient temperature, and the on-off valve, the heat dissipation component and the first temperature detection sensor are electrically connected with the controller. The engine thermal management system can automatically control whether the on-off valve is in a conducting state or a cutting-off state according to changes in the ambient temperature, and can automatically control whether the coolant flows through the heater core, so as to meet different requirements of heating and high heat dissipation.

Description

Technical Field

[0001] This disclosure relates to the field of engine thermal management technology, specifically to an engine thermal management system and a vehicle. Background Technology

[0002] The engine thermal management system is used to ensure that the engine operates at a suitable operating temperature, thereby achieving low fuel consumption and low carbon emissions, and thus meeting the relevant standards.

[0003] Current engine thermal management systems cannot adjust engine heat management according to the ambient temperature, resulting in the engine coolant heating up quickly when the ambient temperature is high, which cannot meet the engine's high heat dissipation requirements. Summary of the Invention

[0004] The purpose of this disclosure is to provide an engine thermal management system and a vehicle to solve the problem that the engine thermal management system cannot adjust the coolant flow direction according to the ambient temperature.

[0005] To achieve the above objectives, this disclosure provides an engine thermal management system, including: a mechanical water pump, a water jacket, a heater core, a fan, a switching valve, a heat dissipation component, a controller, and a first temperature detection sensor;

[0006] The outlet of the mechanical water pump is connected to the inlet of the water jacket. The mechanical water pump is used to deliver coolant to the water jacket. The outlet of the water jacket is connected to the heater core and the heat dissipation component, respectively. The heater core and the heat dissipation component are connected to the inlet of the mechanical water pump, so that the coolant in the water jacket can flow through the heater core and / or the heat dissipation component and enter the mechanical water pump. The switching valve is connected to the flow path between the heater core and the inlet of the mechanical water pump. The fan is used to blow air onto the heater core.

[0007] The first temperature sensor is used to detect the ambient temperature. The switching valve, the heat dissipation component, the fan, and the first temperature sensor are all electrically connected to the controller. The controller is used to control the switching valve to open or close based on the temperature value detected by the first temperature sensor.

[0008] Specifically, when the first temperature sensor detects that the ambient temperature is lower than a first threshold, the controller controls the switching valve to be in the conducting state and controls the fan to be turned on so that the air flowing through the heater core can flow into the passenger compartment of the vehicle. When the first temperature sensor detects that the ambient temperature is higher than a second threshold, the controller controls the switching valve to be in the cut-off state or the conducting state and controls the fan to be turned off. The first threshold is less than or equal to the second threshold.

[0009] Optionally, the engine thermal management system further includes a second temperature detection sensor, which is electrically connected to the controller and connected to the water jacket. The second temperature detection sensor is used to detect the temperature of the coolant in the water jacket.

[0010] Specifically, when the second temperature sensor detects that the temperature of the coolant in the water jacket is higher than or equal to the third threshold and lower than or equal to the fourth threshold, and the first temperature sensor detects that the ambient temperature is higher than the second threshold, the controller controls the switching valve to be in the conducting state and controls the fan to be turned off.

[0011] When the second temperature sensor detects that the temperature of the coolant in the water jacket is higher than the fourth threshold, and the first temperature sensor detects that the ambient temperature is higher than the second threshold, the controller controls the switching valve (8) to be in the cut-off state.

[0012] Optionally, the heat dissipation component includes a radiator and an electric heating thermostat. The inlet of the electric heating thermostat is connected to the outlet of the water jacket, the outlet of the electric heating thermostat is connected to the inlet of the radiator, the outlet of the radiator is connected to the inlet of the mechanical water pump, and the electric heating thermostat is electrically connected to the controller. The controller is used to control the opening or closing of the electric heating thermostat according to the temperature value detected by the second temperature detection sensor.

[0013] Optionally, the engine thermal management system further includes an electronic water pump, which is connected in the flow path between the heater core and the switching valve. The inlet of the electronic water pump is connected to the switching valve, and the outlet of the electronic water pump is connected to the heater core. The electronic water pump is electrically connected to the controller, which is used to control the start or stop of the electronic water pump based on the temperature values ​​detected by the first temperature detection sensor and the second temperature detection sensor.

[0014] When the first temperature sensor detects that the ambient temperature is lower than the first threshold, and the second temperature sensor detects that the temperature of the coolant in the water jacket is higher than or equal to the fifth threshold and lower than or equal to the sixth threshold, the controller can control the electronic water pump to start, and the electronic water pump drives the coolant to flow in the opposite direction for heating.

[0015] Optionally, the engine thermal management system has an engine emergency stop mode. When the engine thermal management system is in the engine emergency stop mode, the controller can control the electronic water pump to start, and the electronic water pump drives the coolant to flow in reverse to cool the engine.

[0016] Optionally, the mechanical water pump has a pump pulley and a pump shaft, and the mechanical water pump is provided with an adjustment mechanism;

[0017] The regulating mechanism includes a driver and a temperature-sensing control switch. The temperature-sensing control switch is connected to the driver and can detect the temperature of the coolant in the mechanical water pump. The temperature-sensing control switch is used to control the driver to connect or disconnect the water pump pulley and the water pump shaft. The driving end of the driver is connected to the water pump pulley and / or the water pump shaft to adjust whether the mechanical water pump forms a delivery force to the coolant.

[0018] Optionally, the water jacket includes a cylinder block water jacket and a cylinder head water jacket. The inlet of the cylinder head water jacket is connected to the outlet of the cylinder block water jacket. The outlet of the mechanical water pump is connected to the inlet of the cylinder block water jacket. The outlet of the cylinder head water jacket is connected to the heater core and the heat dissipation component, respectively.

[0019] Optionally, the engine thermal management system further includes an engine cooler and an EGR cooler. The engine cooler is used to cool the engine oil, and the EGR cooler is used to cool the generated exhaust gas. The inlet of the engine cooler and the inlet of the EGR cooler are respectively connected to the outlet of the cylinder block water jacket, and the outlet of the engine cooler and the outlet of the EGR cooler are respectively connected to the inlet of the mechanical water pump, so that the coolant in the cylinder block water jacket can flow through the engine cooler and the EGR cooler and enter the mechanical water pump.

[0020] Optionally, the engine thermal management system further includes an expansion tank, a first overflow pipe, a second overflow pipe, and a replenishment pipe. The first overflow pipe, the second overflow pipe, and the replenishment pipe are all connected to the expansion tank. The end of the first overflow pipe away from the expansion tank is connected to the cylinder head water jacket. The end of the second overflow pipe away from the expansion tank is connected to the flow path connecting the cylinder head water jacket and the heat dissipation component. The end of the replenishment pipe away from the expansion tank is connected to the inlet end of the mechanical water pump.

[0021] Another aspect of this disclosure provides a vehicle including the aforementioned engine thermal management system.

[0022] The aforementioned technical solution, through its specially designed on / off valve, controls whether coolant flows through the heater core based on varying heating and cooling requirements. It ensures heating needs are met when necessary, while concentrating coolant delivery to the cooling system when the engine has high cooling demands, thus improving engine cooling efficiency and preventing overheating. A primary temperature sensor detects the ambient temperature, allowing the controller to adjust accordingly, automatically controlling the on / off state of the valve to automatically control coolant flow through the heater core without requiring extensive manual intervention.

[0023] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of an engine thermal management system according to one embodiment of the present disclosure;

[0026] Figure 2 This is a schematic diagram of the coolant flow direction in Mode 2 and Mode 5 of the engine thermal management system according to one embodiment of this disclosure;

[0027] Figure 3 This is a schematic diagram of the coolant flow direction in Mode 3 of an engine thermal management system according to one embodiment of the present disclosure;

[0028] Figure 4 This is a schematic diagram of the coolant flow direction in Mode 4 and Mode 7 of an engine thermal management system according to one embodiment of the present disclosure.

[0029] Figure 5 This is a schematic diagram of the coolant flow direction in Mode Six of an engine thermal management system according to one embodiment of this disclosure;

[0030] Figure 6 This is a schematic diagram of the electrical connection relationship of the controller according to one embodiment of the present disclosure.

[0031] Explanation of reference numerals in the attached figures

[0032] 1. Mechanical water pump; 2. Cylinder block water jacket; 3. Cylinder head water jacket; 4. Engine cooler; 5. EGR cooler; 6. Heater core; 7. Electric water pump; 8. Switch valve; 9. Radiator; 10. Electric heating thermostat; 11. Expansion tank; 12. First overflow pipe; 13. Second overflow pipe; 14. Make-up pipe; 15. Fan. Detailed Implementation

[0033] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0034] In this disclosure, unless otherwise stated, directional terms such as "upper," "lower," "left," and "right" are generally used to define the orientation of the accompanying drawings, and "inner" and "outer" refer to the inner and outer parts of the relevant components. Furthermore, terms such as "first" and "second" are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] In the description of this disclosure, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0036] like Figures 1-6 As shown, one aspect of this disclosure provides an engine thermal management system, including: a mechanical water pump 1, a water jacket, a heater core 6, a fan 15, a switching valve 8, a heat dissipation component, a controller, and a first temperature detection sensor.

[0037] The outlet of the mechanical water pump 1 is connected to the inlet of the water jacket. The mechanical water pump 1 is used to deliver coolant to the water jacket. The outlet of the water jacket is connected to the heater core 6 and the heat dissipation component, respectively. The heater core 6 and the heat dissipation component are connected to the inlet of the mechanical water pump 1, so that the coolant in the water jacket can flow through the heater core 6 and / or the heat dissipation component and enter the mechanical water pump 1. The switching valve 8 is connected to the flow path between the heater core 6 and the inlet of the mechanical water pump 1. The fan 15 is used to blow air into the heater core 6.

[0038] The first temperature sensor is used to detect the ambient temperature. The switching valve 8, heat dissipation components, fan 15, and the first temperature sensor are all electrically connected to the controller. The controller is used to control the opening or closing of the switching valve 8 based on the temperature value detected by the first temperature sensor. The switching valve 8 is used to open or close the flow path between the heater core 6 and the inlet end of the mechanical water pump 1, and can control whether the coolant flows through the heater core 6.

[0039] When the first temperature sensor detects that the ambient temperature is below a first threshold, it indicates that the ambient temperature is low. At this time, it is assumed that the vehicle's passenger compartment requires heating. The controller activates the on / off valve 8, allowing coolant to flow through the heater core 6. The controller also activates the fan 15, enabling air flowing through the heater core 6 to enter the passenger compartment and provide heating. In this case, the heater core 6 serves as the heat source for heating the vehicle's passenger compartment. If the occupants do not wish to receive heating, they can simply turn off the fan 15. The coolant will still flow through the heater core 6, ensuring heating is always available.

[0040] When the first temperature sensor detects that the ambient temperature is higher than or equal to the first threshold and lower than or equal to the second threshold, it indicates that the ambient temperature is moderate. At this time, the switch valve 8 and the fan 15 can be controlled according to the actual needs of the vehicle's passenger compartment. When the passenger compartment needs heating, after the driver and passengers perform the heating operation, the controller controls the switch valve 8 to be in the conducting state, and the fan 15 is turned on. When the passenger compartment does not need heating, after the driver and passengers do not perform the heating operation, the switch valve 8 is in the cut-off state, and the fan 15 is in the closed state.

[0041] When the first temperature sensor detects that the ambient temperature is higher than the second threshold, it indicates that the ambient temperature is high. At this time, it is assumed that there is no heating requirement in the vehicle's passenger compartment, and the controller keeps the fan 15 in the off state. At the same time, the controller can control the switching valve 8 to be in the cut-off state or the conduction state according to the engine's heat dissipation requirements. At this time, the heater core 6 plays the role of dissipating heat from the coolant, and since the fan 15 is in the off state, no warm air is supplied to the vehicle's passenger compartment.

[0042] Specifically, when the engine has a high cooling demand, the switch valve 8 is in the cut-off state, cutting off the flow path between the heater core 6 and the inlet end of the mechanical water pump 1. At this time, the coolant does not flow through the heater core 6, but only through the cooling mechanism, which centrally and efficiently dissipates the coolant, thereby improving the cooling effect on the engine.

[0043] When the engine's cooling demand is not high, the switch valve 8 can be in the conducting state, and the heater core 6 can also be used to dissipate heat from the coolant in a small area.

[0044] This allows the switching valve 8 to be controlled according to the engine's cooling requirements, thereby adjusting the flow direction of the coolant and enabling concentrated cooling of the coolant.

[0045] The first threshold is less than or equal to the second threshold. The first threshold can be 10℃, and the second threshold can be 25℃. Of course, the first and second thresholds can also be set according to the actual temperature in different regions.

[0046] The mechanical water pump 1 generates the force to transport the coolant, enabling the coolant to circulate. The coolant then enters the water jacket, carrying away heat into the heater core 6 and the heat dissipation components. The heater core 6 and the heat dissipation components transfer the heat from the coolant, achieving heat dissipation. Finally, the coolant returns to the inlet of the mechanical water pump 1. The mechanical water pump 1 is connected to the engine, and its operation is driven by the engine.

[0047] In this embodiment, the first temperature detection sensor can be connected to the vehicle to detect the ambient temperature and determine its level. This allows for convenient adjustment of the engine thermal management system to meet the thermal management requirements of different ambient temperature conditions.

[0048] In the above technical solution, the switching valve 8 can control whether the coolant flows through the heater core 6 according to different heating and heat dissipation requirements. It ensures heating when needed, and when the engine has high heat dissipation requirements, it concentrates the coolant to the heat dissipation mechanism to ensure the coolant's heat dissipation effect, thereby improving the engine's heat dissipation efficiency and effectively ensuring the engine operates at a suitable temperature, avoiding overheating. The first temperature detection sensor can detect the ambient temperature, allowing the controller to adjust accordingly. This automatically controls whether the switching valve 8 is in the open or closed state, achieving automatic control of coolant flow through the heater core 6 without excessive intervention.

[0049] Optionally, in one embodiment of this disclosure, the engine thermal management system further includes a second temperature detection sensor, which is electrically connected to the controller and connected to the water jacket. The second temperature detection sensor is used to detect the temperature of the coolant in the water jacket.

[0050] Specifically, when the second temperature sensor detects that the temperature of the coolant in the water jacket is higher than or equal to the third threshold and lower than or equal to the fourth threshold, and the first temperature sensor detects that the ambient temperature is higher than the second threshold, the controller controls the switching valve 8 to be in the conducting state and controls the fan 15 to be turned off.

[0051] Specifically, when the second temperature sensor detects that the temperature of the coolant in the water jacket is higher than the fourth threshold, and the first temperature sensor detects that the ambient temperature is higher than the second threshold, the controller controls the switching valve 8 to be in the cut-off state.

[0052] In this embodiment, the second temperature sensor can directly detect the temperature of the coolant in the water jacket to determine whether the engine is at a suitable operating temperature. This allows for the determination of the coolant's heat dissipation requirements and the adjustment and control of the coolant flow path. The controller enables automatic adjustment and control without excessive manual intervention. When the fan 15 is off, it will not provide heating to the passenger compartment.

[0053] Optionally, in one embodiment of this disclosure, the heat dissipation component includes a radiator 9 and an electric heating thermostat 10. The inlet of the electric heating thermostat 10 is connected to the outlet of the water jacket, the outlet of the electric heating thermostat 10 is connected to the inlet of the radiator 9, the outlet of the radiator 9 is connected to the inlet end of the mechanical water pump 1, and the electric heating thermostat 10 is electrically connected to a controller. The controller is used to control the opening or closing of the electric heating thermostat 10 according to the temperature value detected by the second temperature detection sensor.

[0054] The radiator 9 efficiently dissipates heat from the coolant, transferring its heat to the external environment. The electrically heated thermostat 10 opens or closes the flow path between the outlet of the water jacket and the inlet of the radiator 9. When coolant cooling is required, the flow path between the outlet of the water jacket and the inlet of the radiator 9 is opened, allowing coolant to flow into the radiator 9 for cooling. After cooling by the radiator 9, the coolant flows back to the inlet of the mechanical water pump 1. The electrically heated thermostat 10 can be controlled according to heating demand, engine cooling demand, and vehicle operating conditions, making control very convenient and no longer limited by the temperature control of the coolant itself.

[0055] Optionally, in one embodiment of this disclosure, the engine thermal management system further includes an electronic water pump 7, which is connected to the flow path between the heater core 6 and the switching valve 8. The inlet of the electronic water pump 7 is connected to the switching valve 8, the outlet of the electronic water pump 7 is connected to the heater core 6, and the electronic water pump 7 is electrically connected to a controller. The controller is used to control the start or stop of the electronic water pump 7 according to the temperature values ​​detected by the first temperature detection sensor and the second temperature detection sensor.

[0056] When the first temperature sensor detects that the ambient temperature is lower than the first threshold, and the second temperature sensor detects that the temperature of the coolant in the water jacket is higher than or equal to the fifth threshold and lower than or equal to the sixth threshold, the controller can control the electronic water pump 7 to start, and the electronic water pump 7 drives the coolant to flow in the opposite direction for heating.

[0057] In this embodiment, the electric water pump 7 is used to generate a conveying force for the coolant, thereby propelling the coolant to flow. Specifically, the inlet of the electric water pump 7 is connected to the switching valve 8, and the outlet of the electric water pump 7 is connected to the heater core 6. Therefore, the electric water pump 7 reverses the flow of coolant to the heater core 6, and then flows into the water jacket through the heater core 6. The electric water pump 7 is electrically driven. The model of the electric water pump 7 can be Pierburg, and the manufacturer's model number is WUP.

[0058] Optionally, the engine thermal management system has an engine emergency stop mode. When the engine thermal management system is in the engine emergency stop mode, the controller can control the electric water pump 7 to start, and the electric water pump 7 drives the coolant to flow in reverse to cool the engine.

[0059] Specifically, the electronic water pump 7 starts under two vehicle operating conditions. One of these conditions is when the ambient temperature is low, that is, when the first temperature sensor detects that the ambient temperature is below the first threshold, and the engine has just started. At this time, the mechanical water pump 1 is idling and the coolant is not flowing. Since it is necessary to heat the interior of the vehicle, the electronic water pump 7 starts and reverses the flow of coolant. The coolant flows sequentially through the heater core 6, the water jacket, the mechanical water pump 1, and then back to the electronic water pump 7. At this time, some of the heat from the engine start is transferred to the heater core 6, which heats the interior of the vehicle through the fan 15. Meanwhile, the coolant does not pass through the electric thermostat 10 and the radiator 9.

[0060] Another vehicle operating condition is during an emergency engine shutdown. When the engine stops, the mechanical water pump 1 ceases operation. At this time, the engine temperature is still high, and the coolant flow stops, preventing heat dissipation from the engine. In this scenario, the electronic water pump 7 is activated, reversing the coolant flow. The coolant flows sequentially through the heater core 6, the water jacket, the mechanical water pump 1, and then back to the electronic water pump 7. The heater core 6 then dissipates the coolant heat to cool the engine, thus protecting it. During this operation, the coolant bypasses the electric thermostat 10 and the radiator 9.

[0061] It should be noted that when the electric water pump 7 is started, the coolant is transported in reverse. In the first vehicle operating condition, the mechanical water pump 1 is in an idling state, and the coolant can flow directly through the mechanical water pump 1. In the second vehicle operating condition, the coolant can flow through the gap of the water pump pulley of the mechanical water pump 1, thus realizing the flow of coolant.

[0062] Under other vehicle operating conditions, the electronic water pump 7 is in the off state. At this time, the mechanical water pump 1 generates the conveying force to drive the coolant flow. The coolant can flow through the impeller gap of the electronic water pump 7, thus realizing the flow of coolant. Therefore, the coolant in this engine thermal management system has three states: no flow, forward flow, and reverse flow.

[0063] In this embodiment, the electronic water pump 7 enables the coolant to flow in reverse, bypassing the radiator 9 and the electric thermostat 10. This allows the coolant to flow only between the heater core 6 and the water jacket, achieving direct heat exchange and ensuring heating performance. In the event of an emergency engine shutdown, it can also slowly dissipate heat from the engine, protecting it.

[0064] The controller controls the switching valve 8, the electronic water pump 7, and the electric thermostat 10 based on the temperature of the coolant in the water jacket detected by the second temperature sensor. Specifically, the controller can be an ECU controller.

[0065] Specifically, when the first temperature sensor detects that the ambient temperature is higher than the second threshold, and the second temperature sensor detects that the temperature of the coolant in the water jacket is lower than the third threshold, the controller controls the switch valve 8 to be in the cut-off state. At the same time, the temperature-sensing control switch on the mechanical water pump 1 controls the driver to separate the water pump pulley and the water pump shaft, at which time the coolant does not flow.

[0066] When the first temperature sensor detects that the ambient temperature is higher than the second threshold, and the second temperature sensor detects that the temperature of the coolant in the water jacket is higher than or equal to the third threshold and lower than or equal to the fourth threshold, the controller controls the switch valve 8 to be in the conducting state, the electronic water pump 7 to be turned off, the electric heating thermostat 10 to be turned off, and the fan 15 to be turned off. At this time, the coolant dissipates heat through the heater core 6.

[0067] When the first temperature sensor detects that the ambient temperature is higher than the second threshold, and the second temperature sensor detects that the temperature of the coolant in the water jacket is higher than the fourth threshold, the controller controls the switch valve 8 to be in the cut-off state, the electronic water pump 7 is turned off, the fan 15 is turned off, and the electric heating thermostat 10 is in the open state. At this time, the coolant flows to the radiator 9 for efficient heat dissipation.

[0068] When the first temperature sensor detects that the ambient temperature is below the first threshold, and the second temperature sensor detects that the temperature of the coolant in the water jacket is above or equal to the fifth threshold and below or equal to the sixth threshold, the controller controls the switching valve 8 to be in the conducting state. The controller then controls the electronic water pump 7 to start, causing the coolant to flow in reverse through the heater core 6. Simultaneously, the fan 15 is turned on, providing heating. It should be noted that the "coolant temperature above or equal to the fifth threshold and below or equal to the sixth threshold" setting is only used to determine whether to start the electronic water pump 7. When the coolant temperature is between the fifth and sixth thresholds, the electronic water pump 7 can be started. After the electronic water pump 7 starts, the coolant temperature will continue to rise. When the coolant temperature rises to above the fifth threshold but below the third threshold, the electronic water pump 7 can remain running without intervention. Only when the coolant temperature rises to above or equal to the third threshold and below or equal to the fourth threshold will the electronic water pump 7 be turned off. The fifth threshold is less than the third threshold.

[0069] When the first temperature sensor detects that the ambient temperature is lower than the first threshold, and the second temperature sensor detects that the temperature of the coolant in the water jacket is higher than or equal to the third threshold and lower than or equal to the fourth threshold, the controller controls the switch valve 8 to be in the conducting state, the electronic water pump 7 to be turned off, the fan 15 to be turned on, and the electric heating thermostat 10 to be turned off. At this time, the coolant dissipates heat through the heater core 6, and the heater core 6 and the fan 15 together heat the passenger compartment inside the vehicle.

[0070] When the first temperature sensor detects that the ambient temperature is lower than the first threshold, and the second temperature sensor detects that the temperature of the coolant in the water jacket is higher than the fourth threshold, the controller controls the switch valve 8 to open, the electronic water pump 7 to close, the fan 15 to open, and the electric heating thermostat 10 to open. At this time, the coolant dissipates heat through the heater core 6 and the radiator 9, and the heater core 6 and the fan 15 together heat the passenger compartment inside the vehicle.

[0071] The third threshold is 70℃, the fourth threshold is 80℃, the fifth threshold is 30℃, and the sixth threshold is 40℃. It should be noted that the third, fourth, fifth, and sixth thresholds can be set according to actual conditions.

[0072] Optionally, in one embodiment of this disclosure, the mechanical water pump 1 has a water pump pulley and a water pump shaft, and the mechanical water pump 1 is provided with an adjustment mechanism. The adjustment mechanism is used to drive the water pump pulley and the water pump shaft to connect or disconnect, so as to adjust whether the mechanical water pump 1 forms a conveying force to the coolant.

[0073] An adjusting mechanism is provided on the mechanical water pump 1, which can drive the water pump pulley and the water pump shaft to connect or disconnect. It is understood that when the water pump pulley and the water pump shaft are connected and pressed together, the mechanical water pump 1 can generate a conveying force to the coolant; when the water pump pulley and the water pump shaft are disconnected, the mechanical water pump 1 does not generate a conveying force to the coolant, and the coolant is in a static, non-flowing state.

[0074] Specifically, when the engine is first started, it needs to reach its operating temperature quickly. At this time, there is no need to cool the engine. By adjusting the mechanism to separate the water pump pulley and the water pump shaft, the coolant stops flowing, allowing the engine to reach its operating temperature quickly.

[0075] By installing an adjustment mechanism on the mechanical water pump 1, the flow of coolant can be stopped when the engine is first started, keeping the coolant in a stagnant state to stop heat dissipation from the engine and ensure that the engine quickly reaches its operating temperature. This engine thermal management system can adjust according to the different heat demands of the engine during startup or normal operation to meet the needs of rapid engine warm-up or high heat dissipation, as well as the vehicle's heating requirements.

[0076] Optionally, in one embodiment of this disclosure, the regulating mechanism includes a driver and a temperature control switch. The temperature control switch is connected to the driver and can detect the temperature of the coolant in the mechanical water pump 1. The temperature control switch is used to control the driver to connect or disconnect the water pump pulley and the water pump shaft. The driving end of the driver is connected to the water pump pulley and / or the water pump shaft.

[0077] In this embodiment, the driver can drive the water pump pulley and water pump shaft to connect or disconnect. Specifically, when the driver's drive end is connected to the water pump pulley, the driver drives the water pump pulley to move closer to or away from the water pump shaft. When the water pump pulley contacts and presses against the water pump shaft, kinetic energy is transferred, thus generating a conveying force for the coolant. When the driver's drive end is connected to the water pump shaft, the driver drives the water pump shaft to move closer to or away from the water pump pulley. When the water pump pulley contacts and presses against the water pump shaft, kinetic energy is transferred, thus generating a conveying force for the coolant. When the driver's drive end is connected to both the water pump pulley and the water pump shaft, it can drive the water pump shaft and the water pump pulley to move closer to or further apart.

[0078] In this embodiment, the temperature-sensing control switch can detect the temperature of the coolant in the mechanical water pump 1 to determine whether the engine has just started. When the engine has just started, the coolant temperature is low, and the temperature-sensing control switch controls the driver to disengage the water pump pulley and the water pump shaft, at which point the mechanical water pump 1 is in an idling state. After the engine has been running for a period of time, when the coolant temperature reaches a set value, the temperature-sensing control switch controls the driver to connect the water pump pulley and the water pump shaft, at which point the mechanical water pump 1 generates a conveying force for the coolant, causing the coolant to circulate. Specifically, both the temperature-sensing control switch and the driver are existing technologies. The driver can be a telescopic hydraulic cylinder.

[0079] In the technical solution of this embodiment, the temperature-sensing control switch can determine whether the engine is in a newly started state based on the temperature of the coolant in the mechanical water pump 1. It can achieve automatic adjustment without much human intervention, enabling the engine to quickly reach the operating temperature and reducing fuel consumption and carbon emissions.

[0080] Optionally, in one embodiment of this disclosure, the water jacket includes a cylinder body water jacket 2 and a cylinder head water jacket 3. The inlet of the cylinder head water jacket 3 is connected to the outlet of the cylinder body water jacket 2. The outlet of the mechanical water pump 1 is connected to the inlet of the cylinder body water jacket 2. The outlet of the cylinder head water jacket 3 is connected to the heater core 6 and the heat dissipation component, respectively.

[0081] In this embodiment, the cylinder head water jacket 3 can be connected to the upper end of the cylinder block water jacket 2. The cylinder block water jacket 2 is used to dissipate heat from the engine block, and the cylinder head water jacket 3 is used to dissipate heat from the engine cylinder head. Coolant can flow from the cylinder block water jacket 2 into the cylinder head water jacket 3. Of course, when the electronic water pump 7 in the above embodiment is started, coolant can also flow from the cylinder head water jacket 3 into the cylinder block water jacket 2. The coolant in the cylinder head water jacket 3 can flow to the heater core 6 and the heat dissipation components.

[0082] Optionally, in one embodiment of this disclosure, the engine thermal management system further includes an engine cooler 4 and an EGR cooler 5. The engine cooler 4 is used to cool the engine oil, and the EGR cooler 5 is used to cool the generated exhaust gas. The inlet of the engine cooler 4 and the inlet of the EGR cooler 5 are respectively connected to the outlet of the cylinder block water jacket 2, and the outlet of the engine cooler 4 and the outlet of the EGR cooler 5 are respectively connected to the inlet of the mechanical water pump 1, so that the coolant in the cylinder block water jacket 2 can flow through the engine cooler 4 and the EGR cooler 5 and enter the mechanical water pump 1.

[0083] In this embodiment, the coolant in the cylinder block water jacket 2 can flow into it from the inlet of the engine cooler 4 and the inlet of the EGR cooler 5, respectively, to achieve heat exchange. This allows heat from the engine oil and exhaust gases to be transferred to the coolant, which then carries away the heat, thus dissipating heat from the engine oil and the exhaust gases produced by the engine. Specifically, the engine cooler 4 and the EGR cooler 5 are arranged side by side. The coolant flowing through the engine cooler 4 and the EGR cooler 5 mixes with the coolant treated by the radiator 9, thereby cooling the coolant flowing through the engine cooler 4 and the EGR cooler 5.

[0084] Optionally, in one embodiment of this disclosure, the engine thermal management system further includes an expansion tank 11, a first overflow pipe 12, a second overflow pipe 13, and a replenishment pipe 14. The first overflow pipe 12, the second overflow pipe 13, and the replenishment pipe 14 are all connected to the expansion tank 11. The end of the first overflow pipe 12 away from the expansion tank 11 is connected to the cylinder head water jacket 3. The end of the second overflow pipe 13 away from the expansion tank 11 is connected to the flow path connecting the cylinder head water jacket 3 and the heat dissipation component. The end of the replenishment pipe 14 away from the expansion tank 11 is connected to the inlet end of the mechanical water pump 1.

[0085] In this embodiment, the first overflow pipe 12 can guide excess coolant in the cylinder head water jacket 3 to the expansion tank 11, and at the same time, the first overflow pipe 12 can vent air. The second overflow pipe 13 can guide excess coolant in the flow path connecting the cylinder head water jacket 3 and the heat dissipation components to the expansion tank 11, and can also vent air. The replenishment pipe 14 can guide the coolant in the expansion tank 11 to the inlet end of the mechanical water pump 1 for replenishing coolant.

[0086] Furthermore, this engine thermal management system can adjust the coolant temperature according to the vehicle's operating conditions and different engine states, ensuring heat dissipation and reducing power consumption. Specifically, when the engine is running under low load, high coolant temperature control is used, maintaining the coolant temperature at around 90℃. At this high temperature, the friction pair temperature is reduced, minimizing frictional energy loss. When the vehicle is operating at high speed, the coolant temperature is maintained at around 85℃. When the vehicle is operating under low speed and high load, the coolant temperature is maintained at around 80℃, which helps protect the engine and prevents it from overheating.

[0087] A second aspect of this disclosure provides a vehicle including an engine thermal management system as described above.

[0088] Specifically, the engine thermal management system has the following operating modes.

[0089] In Mode 1, when the first temperature sensor detects an ambient temperature higher than 25°C, it indicates a high ambient temperature. At this time, it is assumed that there is no heating requirement inside the vehicle, and the engine is in a cold start or warm-up phase. The temperature-sensing control switch of mechanical water pump 1 controls the driver to disengage the water pump pulley and shaft, causing mechanical water pump 1 to idle. Simultaneously, the ECU controller controls the switch valve 8 to be in a cut-off state, resulting in the coolant in the cylinder head water jacket 3 and cylinder block water jacket 2 remaining stationary. Combustion occurs inside the engine cylinders, transferring heat from the engine to the coolant in the water jackets. Since the coolant does not flow to dissipate heat, both the engine and the coolant in the water jackets can quickly warm up to a suitable operating temperature.

[0090] In Mode 2, when the first temperature sensor detects an ambient temperature higher than 25°C, it indicates a high ambient temperature, and the vehicle interior is considered to have no heating requirement. When the second temperature sensor detects that the coolant temperature in the water jacket reaches 70-80°C, the temperature-sensing control switch of the mechanical water pump 1 controls the driver to connect the water pump pulley and the water pump shaft. At this time, the mechanical water pump 1 generates a force to deliver the coolant, causing the coolant to circulate. Simultaneously, the ECU controller controls the switching valve 8 to be in the conducting state and controls the electric heating thermostat 10 to be in the closed state. The mechanical water pump 1 drives the coolant through two flow paths: the first path is through the cylinder block water jacket 2, the engine cooler 4, and the EGR cooler 5, then back to the mechanical water pump 1; the second path is through the cylinder block water jacket 2, the cylinder head water jacket 3, the heater core 6, the electric water pump 7, and the switching valve 8, then back to the mechanical water pump 1. At this time, the coolant's heat dissipation requirement is not high, and it can be directly cooled by the heater core 6, maintaining the engine at a suitable operating temperature. The fan 15 is not running at this time, so no heating is generated.

[0091] In Mode 3, when the first temperature sensor detects an ambient temperature higher than 25°C, it indicates a high ambient temperature, and the vehicle interior is assumed to have no heating requirement. When the second temperature sensor detects that the coolant temperature in the water jacket reaches above 80°C, the temperature control switch of the mechanical water pump 1 controls the driver to connect the water pump pulley and the water pump shaft. At this time, the mechanical water pump 1 generates a force to deliver coolant, causing the coolant to circulate. Simultaneously, the ECU controller controls the switch valve 8 to be in the cut-off state, preventing the coolant from passing through the heater core 6. Additionally, the ECU controller controls the electric heating thermostat 10 to be in the open state. The coolant then has two flow paths: the first path is through the cylinder block water jacket 2, the engine cooler 4, and the EGR cooler 5, before returning to the mechanical water pump 1; the second path is through the cylinder block water jacket 2, the cylinder head water jacket 3, the electric heating thermostat 10, and the radiator 9, before returning to the mechanical water pump 1. The radiator 9 transfers the heat of the coolant to the outside, achieving efficient heat dissipation of the coolant, controlling the coolant temperature balance, and ensuring the engine does not overheat.

[0092] In Mode 4, when the first temperature sensor detects an ambient temperature below 10°C, it indicates a low ambient temperature and a need for vehicle heating. However, when the engine is first started and the coolant temperature is below the preset value of the temperature control switch, the temperature control switch of mechanical water pump 1 controls the driver to disengage the water pump pulley and shaft, causing mechanical water pump 1 to idle. Simultaneously, when the second temperature sensor detects a coolant temperature below 30°C in the water jacket, the ECU controller controls the switch valve 8 to be in the off state. When the second temperature sensor detects a coolant temperature of 30-40°C in the water jacket, the ECU controller controls the switch valve 8 to be in the on state, and simultaneously controls the electronic water pump 7 to start. The electronic water pump 7 drives the coolant to flow in reverse, passing sequentially through the heater core 6, cylinder head water jacket 3, cylinder block water jacket 2, then branching through the engine cooler 4, EGR cooler 5, and mechanical water pump 1, before returning to the electronic water pump 7. The coolant then provides heating to the passenger compartment through the heater core 6 and fan 15. When the coolant temperature rises above 40°C, the mechanical water pump 1 can be kept running idle, and the electric water pump 7 can be used to generate heating. When the coolant temperature reaches the engine operating temperature, the electric water pump 7 can be turned off, and the mechanical water pump 1 can run, which is the mode five below.

[0093] In Mode 5, when the first temperature sensor detects an ambient temperature below 10°C, it indicates a low ambient temperature and a need for vehicle heating. When the second temperature sensor detects that the coolant temperature in the water jacket reaches 70-80°C, the temperature-sensing control switch of the mechanical water pump 1 controls the driver to connect the water pump pulley and the water pump shaft. At this time, the mechanical water pump 1 generates a force to deliver the coolant, causing the coolant to circulate. Simultaneously, the ECU controller controls the switching valve 8 to be in the conducting state and controls the electric heating thermostat 10 to be in the closed state. The mechanical water pump 1 drives the coolant through two flow paths: the first path is through the cylinder block water jacket 2, the engine cooler 4, and the EGR cooler 5, then back to the mechanical water pump 1; the second path is through the cylinder block water jacket 2, the cylinder head water jacket 3, the heater core 6, the electric water pump 7, and the switching valve 8, then back to the mechanical water pump 1. At this time, the cooling demand of the coolant is not high, and the heater core 6 can be used directly for heat dissipation. At the same time, the heater core 6 and the fan 15 provide heat to the interior of the vehicle to ensure the temperature inside the passenger compartment and keep the engine at a suitable operating temperature.

[0094] Mode Six: When the first temperature sensor detects that the ambient temperature is below 10℃, it indicates that the ambient temperature is low and the vehicle is under low-speed, high-load conditions. Simultaneously, when the second temperature sensor detects that the coolant temperature in the water jacket reaches above 80℃, the temperature-sensing control switch of the mechanical water pump 1 controls the driver to connect the water pump pulley and the water pump shaft. At this time, the mechanical water pump 1 forms a force to deliver coolant, and the coolant circulates. At the same time, the ECU controller controls the switching valve 8 to be in the conducting state, and the ECU controller controls the electric heating thermostat 10 to be in the open state. The coolant has three flow paths at this time: the first path is through the cylinder block water jacket 2, the engine cooler 4, and the EGR cooler 5, and then back to the mechanical water pump 1; the second path is through the cylinder block water jacket 2, the cylinder head water jacket 3, the heater core 6, the electric water pump 7, and the switching valve 8, and then back to the mechanical water pump 1; the third path is through the cylinder block water jacket 2, the cylinder head water jacket 3, the electric heating thermostat 10, and the radiator 9, and then back to the mechanical water pump 1. The radiator 9 transfers heat from the coolant to the outside, enabling rapid cooling of the coolant, controlling the temperature balance of the coolant, and ensuring that the engine does not overheat. At the same time, the heater core 6 and the fan 15 can transfer heat to the interior of the vehicle for heating.

[0095] In Mode 7, when the engine malfunctions and shuts down urgently, the engine temperature is high and requires cooling through coolant circulation. When the engine stops, the mechanical water pump 1 is forced to stop; the ECU controller controls the switching valve 8 to be in the conducting state, and at the same time, the ECU controller controls the electronic water pump 7 to start. The electronic water pump 7 drives the coolant to flow in reverse, passing sequentially through the heater core 6, cylinder head water jacket 3, cylinder block water jacket 2, then branching through the engine cooler 4, EGR cooler 5 and mechanical water pump 1, before returning to the electronic water pump 7. The coolant is then slowly cooled through the heater core 6 to protect the engine.

[0096] In mode eight, when the engine is idling and the second temperature sensor detects that the coolant temperature in the water jacket is below 70°C, the temperature control switch of mechanical water pump 1 controls the driver to disengage the water pump pulley and shaft. At this point, mechanical water pump 1 runs idle, and the ECU controller controls valve 8 to be in the off state. The coolant in cylinder head water jacket 3 and cylinder block water jacket 2 is in a stagnant state. This maintains engine temperature and reduces frictional energy loss.

[0097] It should be noted that the threshold values ​​for the first and second temperature sensors can be selected and set according to the actual situation.

[0098] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0099] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0100] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. An engine thermal management system, characterized in that, include: Mechanical water pump, water jacket, heating core, fan, switching valve, heat dissipation components, controller and first temperature detection sensor; The outlet of the mechanical water pump is connected to the inlet of the water jacket. The mechanical water pump is used to deliver coolant to the water jacket. The outlet of the water jacket is connected to the heater core and the heat dissipation component, respectively. The heater core and the heat dissipation component are connected to the inlet of the mechanical water pump, so that the coolant in the water jacket can flow through the heater core and / or the heat dissipation component and enter the mechanical water pump. The switching valve is connected to the flow path between the heater core and the inlet of the mechanical water pump. The fan is used to blow air onto the heater core. The first temperature sensor is used to detect the ambient temperature. The switching valve, the heat dissipation component, the fan, and the first temperature sensor are all electrically connected to the controller. The controller is used to control the switching valve to open or close based on the temperature value detected by the first temperature sensor. Specifically, when the first temperature sensor detects that the ambient temperature is lower than a first threshold, the controller controls the switching valve to be in the conducting state and controls the fan to be turned on so that the air flowing through the heater core can flow into the passenger compartment of the vehicle. When the first temperature sensor detects that the ambient temperature is higher than a second threshold, the controller controls the switching valve to be in the cut-off state or the conducting state and controls the fan to be turned off. The first threshold is less than or equal to the second threshold. The engine thermal management system further includes a second temperature detection sensor, which is electrically connected to the controller and connected to the water jacket. The second temperature detection sensor is used to detect the temperature of the coolant in the water jacket. Specifically, when the second temperature sensor detects that the temperature of the coolant in the water jacket is higher than or equal to the third threshold and lower than or equal to the fourth threshold, and the first temperature sensor detects that the ambient temperature is higher than the second threshold, the controller controls the switching valve to be in the conducting state and controls the fan to be turned off. Specifically, when the second temperature sensor detects that the temperature of the coolant in the water jacket is higher than the fourth threshold, and the first temperature sensor detects that the ambient temperature is higher than the second threshold, the controller controls the switching valve to be in a cut-off state.

2. The engine thermal management system according to claim 1, characterized in that, The heat dissipation component includes a radiator and an electric heating thermostat. The inlet of the electric heating thermostat is connected to the outlet of the water jacket, the outlet of the electric heating thermostat is connected to the inlet of the radiator, the outlet of the radiator is connected to the inlet of the mechanical water pump, and the electric heating thermostat is electrically connected to the controller. The controller is used to control the opening or closing of the electric heating thermostat according to the temperature value detected by the second temperature detection sensor.

3. The engine thermal management system according to claim 1, characterized in that, The engine thermal management system also includes an electronic water pump, which is connected in the flow path between the heater core and the switching valve. The inlet of the electronic water pump is connected to the switching valve, and the outlet of the electronic water pump is connected to the heater core. The electronic water pump is electrically connected to the controller, which is used to control the start or stop of the electronic water pump according to the temperature values ​​detected by the first temperature detection sensor and the second temperature detection sensor. When the first temperature sensor detects that the ambient temperature is lower than the first threshold, and the second temperature sensor detects that the temperature of the coolant in the water jacket is higher than or equal to the fifth threshold and lower than or equal to the sixth threshold, the controller can control the electronic water pump to start, and the electronic water pump drives the coolant to flow in the opposite direction for heating.

4. The engine thermal management system according to claim 3, characterized in that, The engine thermal management system has an engine emergency stop mode. When the engine thermal management system is in the engine emergency stop mode, the controller can control the electronic water pump to start, and the electronic water pump drives the coolant to flow in reverse to cool the engine.

5. The engine thermal management system according to claim 1, characterized in that, The mechanical water pump has a water pump pulley and a water pump shaft, and the mechanical water pump is equipped with an adjustment mechanism. The regulating mechanism includes a driver and a temperature-sensing control switch. The temperature-sensing control switch is connected to the driver and can detect the temperature of the coolant in the mechanical water pump. The temperature-sensing control switch is used to control the driver to connect or disconnect the water pump pulley and the water pump shaft. The driving end of the driver is connected to the water pump pulley and / or the water pump shaft to adjust whether the mechanical water pump forms a delivery force to the coolant.

6. The engine thermal management system according to any one of claims 1-5, characterized in that, The water jacket includes a cylinder block water jacket and a cylinder head water jacket. The inlet of the cylinder head water jacket is connected to the outlet of the cylinder block water jacket. The outlet of the mechanical water pump is connected to the inlet of the cylinder block water jacket. The outlet of the cylinder head water jacket is connected to the heater core and the heat dissipation component, respectively.

7. The engine thermal management system according to claim 6, characterized in that, The engine thermal management system also includes an engine cooler and an EGR cooler. The engine cooler is used to cool the engine oil, and the EGR cooler is used to cool the generated exhaust gas. The inlet of the engine cooler and the inlet of the EGR cooler are respectively connected to the outlet of the cylinder block water jacket. The outlet of the engine cooler and the outlet of the EGR cooler are respectively connected to the inlet of the mechanical water pump, so that the coolant in the cylinder block water jacket can flow through the engine cooler and the EGR cooler and enter the mechanical water pump.

8. The engine thermal management system according to claim 6, characterized in that, The engine thermal management system further includes an expansion tank, a first overflow pipe, a second overflow pipe, and a replenishment pipe. The first overflow pipe, the second overflow pipe, and the replenishment pipe are all connected to the expansion tank. The end of the first overflow pipe away from the expansion tank is connected to the cylinder head water jacket. The end of the second overflow pipe away from the expansion tank is connected to the flow path connecting the cylinder head water jacket and the heat dissipation component. The end of the replenishment pipe away from the expansion tank is connected to the inlet end of the mechanical water pump.

9. A vehicle, characterized in that, Includes the engine thermal management system as described in any one of claims 1-8.

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