Extended-range vehicle thermal management control system and method and extended-range vehicle

Abstract

The invention belongs to the technical field of vehicle heat management, and particularly relates to a heat management control system and method for an extended-range vehicle and the extended-range vehicle. The heat management system for the extended-range vehicle comprises an engine cooling loop which at least comprises an engine, an engine electronic water pump and a cooling fan; the passenger compartment heating loop at least comprises a heating electronic water pump; the valve body assembly is at least used for selectively providing heat provided by the engine cooling loop to a passenger compartment through the passenger compartment heating loop; and when an electronic water pump of the engine breaks down, the engine cooling loop and the passenger compartment warm air circulation loop are connected in series through a valve body assembly, and the engine rotating speed limitation and / or the running state of a cooling fan are / is selectively adjusted based on the temperature of engine cooling liquid. The problem caused by engine electronic water pump faults is solved.

Description

Technical Field

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

[0002] At present, the extended-range vehicles on the market usually adopt a multi-pump design, that is, the engine high-temperature cooling system, the electric drive system low-temperature cooling system, the battery cooling system and the passenger compartment heating system are equipped with independent electronic water pumps. Although this design can achieve independent control of each system, it also has some potential problems.

[0003] One of the main problems is that when the vehicle is in fuel mode (i.e. the engine is running), if the electronic water pump of the engine cooling system fails, the engine coolant may not circulate normally. In this case, the engine temperature may rise rapidly, exceeding the safe operating temperature range, and eventually cause the engine to overheat and be damaged, or even cause the entire vehicle to break down.

[0004] Considering the serious consequences that may be caused by the failure of the engine electronic water pump, it is necessary to develop a more reliable thermal management control method so that when the engine electronic water pump fails, it can use other available resources of the vehicle to maintain the basic cooling function of the engine, prevent the engine from overheating, and provide the driver with enough time to safely stop or seek help. At the same time, this method should also take into account the particularity of extended-range vehicles and be able to flexibly adjust the thermal management strategy in different working modes to adapt to various driving conditions and ambient temperatures.

[0005] In addition, with the continuous improvement of the degree of automobile electronics, the intelligent control of thermal management systems has also become an important development direction. By integrating the information of various vehicle systems, the thermal management system can be accurately controlled and fault diagnosed, which can not only improve the reliability of the system, but also optimize the energy utilization efficiency and further improve the overall performance of the vehicle.

[0006] Therefore, developing a thermal management control method for extended-range vehicles that can cope with key component failures while taking into account system efficiency and reliability is of great significance for improving vehicle safety, improving user experience, and promoting the advancement of new energy vehicle technology. Summary of the invention

[0007] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a thermal management control system and method for an extended-range vehicle and an extended-range vehicle, which solve the problem of engine electronic water pump failure.

[0008] To achieve the above purpose, the present invention adopts the following technical solution.

[0009] A first aspect of the present invention provides a thermal management control system for an extended-range vehicle, comprising: An engine cooling circuit, including at least an engine, an engine electronic water pump and a cooling fan; The passenger compartment heating circuit includes at least a heating electronic water pump; a valve body assembly, at least for selectively providing heat provided by the engine cooling circuit to the passenger compartment through the passenger compartment heating circuit; and When the engine electronic water pump fails, the engine cooling circuit and the passenger compartment warm air circulation circuit are connected in series through the valve body assembly, and the engine speed limit and / or the cooling fan operating state are selectively adjusted based on the engine coolant temperature.

[0010] As an optional embodiment, the engine cooling circuit further includes an oil cooler, a thermostat, an EGR cooler and a high-temperature radiator; The passenger compartment heating circuit also includes a water heater and a passenger compartment heat exchanger; The valve body assembly is a three-way proportional water valve, which includes three water ports a, b and c, wherein: The a and c water ports of the three-way proportional water valve are connected to form an ac channel; The water ports b and a of the three-way proportional water valve are connected to form a channel ba; The b and c water ports of the three-way proportional water valve are connected to form a bc channel.

[0011] As an optional implementation, in pure electric mode and when there is a need to heat the passenger compartment: Engine not working: The water heater heats the internal medium coolant, and pumps the coolant into the passenger compartment heat exchanger through the heating electronic water pump to heat the cold air and send the heated air into the passenger compartment. The a and c water ports of the three-way proportional water valve are connected to form an ac channel, forming a circulation with the heating electronic water pump, water heater and passenger compartment heat exchanger.

[0012] As an optional implementation, in fuel priority mode and when there is a demand for passenger compartment heating: The engine is operating; of which: When the external environment temperature is greater than the first preset environment temperature, the engine electronic water pump and the heating electronic water pump both work, the water heater does not work, the water outlets of the three-way proportional water valve are connected to form bc & b-a channels, and the heating temperature of the passenger compartment is adjusted by adjusting the coolant flow rate of the bc channel; wherein: the coolant at the outlet of the engine electronic water pump is divided into two paths after being heated by the engine, one path goes to the oil cooler, and the other path goes to the thermostat; When the engine coolant temperature is lower than the first preset engine temperature, all the coolant at the thermostat outlet passes through the EGR cooler and enters the three-way proportional water valve; one path passes through the bc channel, the heating electronic water pump, and the water heater and enters the passenger compartment heat exchanger, and the heated air is sent to the passenger compartment; the other path passes through the ba channel and merges with the coolant at the oil cooler outlet and enters the engine electronic water pump, forming a cycle; When the engine coolant temperature is approximately equal to the first preset engine temperature, the thermostats are fully opened. In addition to a part of the outlet coolant flowing into the EGR cooler, a part will flow into the high-temperature radiator and the cooling fan will work at the same time. The high-temperature radiator will cool the incoming high-temperature coolant. After flowing out, it will merge with the oil cooler outlet coolant and the ba channel outlet coolant and enter the engine electronic water pump to form a cycle.

[0013] As an optional implementation, in fuel priority mode and when there is a demand for passenger compartment heating: The engine is operating; of which: When the external ambient temperature is lower than the first preset ambient temperature, during cold start, the water heater heats the passenger compartment, and the heating electronic water pump, water heater, passenger compartment heat exchanger, and ac channel of the three-way proportional water valve form a loop; the engine electronic water pump, engine, and oil cooler form a loop for engine heat storage; when the engine coolant temperature is higher than the preset cooler start temperature, the EGR cooler opens, the ac channel of the three-way proportional water valve switches to the bc channel, the water heater closes, and the passenger compartment is heated by the engine circuit coolant; when there is excess heat in the passenger compartment, the bc channel of the three-way proportional water valve is adjusted to the bc&b-a channel.

[0014] As an optional implementation, in fuel priority mode and when there is no demand for passenger compartment heating: The three-way proportional water valve forms the ba channel. The coolant at the outlet of the engine electronic water pump is heated by the engine and divided into two paths, one to the oil cooler and the other to the thermostat. When the engine coolant temperature is lower than the first preset engine temperature, all the coolant at the thermostat outlet passes through the EGR cooler and enters the ba channel of the three-way proportional water valve, and then merges with the coolant at the oil cooler outlet and enters the engine electronic water pump, forming a cycle; When the engine coolant temperature is greater than or equal to the first preset engine temperature, the thermostats are fully opened, and part of the outlet coolant flows into the EGR cooler, and part flows into the high-temperature radiator. At the same time, the cooling fan works, and the high-temperature radiator cools the incoming high-temperature coolant. The cooled coolant merges with the outlet coolant of the oil cooler and the outlet coolant of the ba channel of the three-way proportional water valve and then enters the engine electronic water pump to form a cycle.

[0015] As an optional implementation, the extended-range vehicle thermal management control system further includes: Obtain and determine the engine coolant temperature; When the engine coolant temperature is lower than or equal to a first preset engine temperature, the thermostat is half-open, the heating electronic water pump operates at a maximum duty cycle, the engine speed is not limited, and the thermal management system responds normally; and / or When the engine coolant temperature is higher than the first preset engine temperature but lower than or equal to the second preset engine temperature, all thermostats are opened, the heating electronic water pump operates at the maximum duty cycle, the cooling fan operates at the maximum duty cycle, the engine speed is limited to the first preset speed, and the thermal management system responds normally; and / or When the engine coolant temperature is higher than the second preset engine temperature but lower than or equal to the third preset engine temperature, all thermostats are opened, the heating electronic water pump operates at a maximum duty cycle, the cooling fan operates at a maximum duty cycle, the engine speed is limited to a second preset speed, and the thermal management system responds normally; and / or When the engine coolant temperature is higher than the third preset engine temperature, all thermostats are opened, the heating electronic water pump operates at the maximum duty cycle, the cooling fan operates at the maximum duty cycle, the engine speed is limited to the third preset speed, and the thermal management system responds normally.

[0016] As an optional implementation, the extended-range vehicle thermal management control system further includes: if the engine speed is limited to a third preset speed and the engine coolant temperature is higher than a fourth preset temperature, it is determined that the engine is overheated and the vehicle is broken down.

[0017] A second aspect of the present invention provides a thermal management control method for an extended-range vehicle, comprising: When the engine water pump fails: The engine cooling circuit and the passenger compartment warm air circulation circuit are connected in series, and the vehicle enters restricted driving mode by controlling the heating electronic water pump.

[0018] As an optional implementation, the range-extended vehicle thermal management control method includes: a method for determining an engine water pump failure includes: The vehicle's engine control module collects fault information and reports DTC; The zone controller determines the DTC; It is determined whether the vehicle enters the restricted mode based on the determination result.

[0019] As an optional implementation, in the range-extended vehicle thermal management control method, there is a three-way proportional water valve; wherein: The engine cooling circuit is composed of an engine electronic water pump, an engine, an oil cooler, a thermostat, an EGR cooler, a cooling fan, and a high-temperature radiator; The passenger compartment heating system is composed of a three-way proportional water valve, a heating electronic water pump, a water heater WPTC, and a passenger compartment heat exchanger; The three-way proportional water valve comprises three water ports a, b and c. When the water ports b and c of the three-way proportional water valve are connected to form a bc channel, the engine cooling circuit and the passenger compartment warm air circulation circuit are connected in series.

[0020] As an optional implementation, the engine cooling circuit and the passenger compartment warm air circulation circuit are connected in series, and the vehicle enters the restricted mode by controlling the heating electronic water pump, including: Obtain and determine the engine coolant temperature; When the engine coolant temperature is lower than or equal to a first preset engine temperature, the thermostat is half-open, the heating electronic water pump operates at a maximum duty cycle, the engine speed is not limited, and the thermal management system responds normally; and / or When the engine coolant temperature is higher than the first preset engine temperature but lower than or equal to the second preset engine temperature, all thermostats are opened, the heating electronic water pump operates at the maximum duty cycle, the cooling fan operates at the maximum duty cycle, the engine speed is limited to the first preset speed, and the thermal management system responds normally; and / or When the engine coolant temperature is higher than the second preset engine temperature but lower than or equal to the third preset engine temperature, all thermostats are opened, the heating electronic water pump operates at a maximum duty cycle, the cooling fan operates at a maximum duty cycle, the engine speed is limited to a second preset speed, and the thermal management system responds normally; and / or When the engine coolant temperature is higher than the third preset engine temperature, the heating electronic water pump operates at a maximum duty cycle, all thermostats are opened, the cooling fan operates at a maximum duty cycle, the engine speed is limited to a third preset speed, and the thermal management system responds normally.

[0021] A third aspect of the present invention provides an extended-range vehicle, comprising the extended-range vehicle thermal management system as described in the first aspect of the present invention.

[0022] A fourth aspect of the present invention provides an electronic device, comprising: At least one processor; and at least one memory in communication with the processor, wherein: the memory stores program instructions executable by the processor, and the processor calls the program instructions to execute the steps of the method described in the second aspect of the present invention.

[0023] A fifth aspect of the present invention provides a readable storage medium storing a computer program, wherein the computer program is executed by a processor to perform the steps of the method described in the second aspect of the present invention.

[0024] In summary, compared with the prior art, the extended-range vehicle thermal management system provided by the present invention effectively solves the serious consequences that may be caused by the failure of the engine electronic water pump in the prior art. By utilizing the heating electronic water pump and the three-way proportional water valve, the engine cooling circuit and the passenger compartment heating circuit are connected in series when the engine electronic water pump fails, and the engine speed limit and the cooling fan operating state are dynamically adjusted according to the coolant temperature. This multi-level control strategy not only maintains the basic cooling function of the engine and effectively prevents the engine from overheating, but also provides the driver with enough time to safely stop or seek rescue. At the same time, the method also takes into account the special needs of extended-range vehicles in different working modes and ambient temperatures, realizes the intelligent control of the thermal management system, improves the system reliability and energy utilization efficiency, and thus significantly improves the overall safety, performance and user experience of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A schematic diagram of an engine cooling circuit and a passenger compartment heating circuit in a thermal management control system for an extended-range vehicle in one embodiment of the present invention is shown.

[0027] Figure 2 A restriction logic diagram of a range-extended vehicle in one embodiment of the present invention is shown.

[0028] Figure 3 A restriction logic diagram of another extended-range vehicle in an embodiment of the present invention is shown.

[0029] Figure 4 FIG. 1 is a schematic diagram of the structure of an electronic device according to an embodiment of the present invention.

[0030] Reference numerals: 1-Engine electronic water pump, 2-Engine, 3-Oil cooler, 4-EGR cooler, 5-Thermostat, 6-Three-way proportional water valve, 7-Heating electronic water pump, 8-Water heater WPTC, 9-Passenger compartment heat exchanger, 10-Cooling fan, 11-High temperature radiator. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0032] It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments of the present application. In addition, in the following embodiments, the description of each embodiment has its own emphasis, and for parts not described in detail in one embodiment, reference can be made to the relevant description of other embodiments.

[0033] An extended-range vehicle is a hybrid vehicle that combines the advantages of a traditional internal combustion engine and an electric motor. This type of vehicle not only has the zero-emission characteristics of a pure electric vehicle, but can also extend the range by generating electricity through an internal combustion engine, effectively alleviating the range anxiety of pure electric vehicles. The thermal management control system of an extended-range vehicle is one of the key systems to ensure the normal operation of the vehicle. The system needs to manage multiple heat sources such as the engine, motor, and battery, as well as the temperature regulation requirements of the passenger compartment at the same time, so it is more complex than the thermal management system of a traditional car. In this system, the electronic water pump plays a vital role, responsible for driving the coolant to circulate in each circuit and transferring heat from the heat source to the radiator or other heat exchange device.

[0034] The present invention mainly relates to the engine cooling system and passenger compartment heating system of the extended-range vehicle. Although the air conditioning system, battery cooling system and electric drive system cooling system are components of the extended-range vehicle thermal management system, they are not the focus of the present invention and are therefore not described in detail in this application document. The specific implementation of these systems can adopt conventional technical solutions known in the art.

[0035] A first aspect of the present invention provides a thermal management control system for an extended-range vehicle, comprising: an engine cooling circuit, a passenger compartment heating circuit and a valve body assembly, wherein: Figure 1 As shown, the valve body assembly can also be understood as a component of the engine cooling circuit and the passenger compartment heating circuit respectively, and the present invention does not make too many requirements.

[0036] Specifically, the valve body assembly provided by the present invention is a three-way proportional water valve 6, which has three water ports including a, b, and c, wherein: The a and c water ports of the three-way proportional water valve are connected to form an ac channel; The water ports b and a of the three-way proportional water valve are connected to form a channel ba; The b and c water ports of the three-way proportional water valve are connected to form a bc channel.

[0037] Specifically, the engine cooling circuit is composed of an engine electronic water pump 1, an engine 2, an oil cooler 3, an EGR cooler 4, a thermostat 5, a three-way proportional water valve 6, a cooling fan 10 and a high-temperature radiator 11, wherein the engine 2 is the engine body. The engine electronic water pump 1 can be understood as an engine water pump; the thermostat has three states: state 1 is the thermostat is fully open: the water flows to both the EGR and the high-temperature radiator; state 2 is the thermostat half open: the water flows only to the EGR; state 3 is the thermostat closed: the water does not flow to either the EGR or the high-temperature radiator.

[0038] Specifically, the passenger compartment heating circuit is composed of a three-way proportional water valve 6, a heating electronic water pump 7, a water heater 8, and a passenger compartment heat exchanger 9. The heating electronic water pump 7 can be understood as a warm air water pump.

[0039] Specifically, Figure 2 As shown, the valve body assembly, such as the three-way proportional water valve 6, is at least used to selectively provide the heat provided by the engine cooling circuit to the passenger compartment through the passenger compartment heating circuit; specifically, the "selectivity" here means that the valve body assembly can decide whether to transfer the heat of the engine cooling circuit to the passenger compartment heating circuit as needed, and this choice may be based on various factors, such as the heating demand of the passenger compartment, the ambient temperature, the engine operating status, etc. The present invention embodies this selectivity in the following embodiments.

[0040] And when the engine electronic water pump 1 fails, the engine cooling circuit and the passenger compartment warm air circulation circuit are connected in series through the three-way proportional water valve 6 (the b and c water ports of the three-way proportional water valve are connected to form a bc channel), and the engine speed limit and / or the cooling fan operating state are selectively adjusted based on the engine coolant temperature. Specifically, "selectively adjusting the engine speed limit and / or the cooling fan operating state" means that the system can flexibly decide whether to adjust the engine speed limit, whether to adjust the cooling fan operating state, or adjust both or more of the following at the same time according to the temperature of the engine coolant. This selective adjustment allows the system to take the most suitable measures to manage the engine temperature according to the specific situation, which can enable the present invention to respond to different working conditions and fault conditions more flexibly and intelligently, thereby improving the efficiency and reliability of the system.

[0041] The extended-range vehicle thermal management system provided by the present invention realizes flexible connection and control of the engine cooling circuit and the passenger compartment heating circuit through a valve body assembly. It can not only effectively utilize the engine waste heat to heat the passenger compartment under normal working conditions, but also when the engine electronic water pump fails, it can switch the three-way proportional water valve mode and utilize the heating electronic water pump to provide circulation power for the engine circuit coolant, and dynamically adjust the engine speed and / or cooling fan status according to the coolant temperature, thereby effectively preventing the engine from overheating and improving the reliability and safety of the system.

[0042] Extended-range vehicles can flexibly switch between pure electric mode and fuel priority mode. This design fully utilizes the advantages of both power systems. The vehicle can automatically or manually select the most suitable working mode based on multiple factors such as battery power, driving conditions, driver preferences, energy management strategy, ambient temperature, etc. When the battery is fully charged, driving at low speeds or in urban conditions, pure electric mode can be used first to achieve zero-emission driving; when the battery is insufficient, driving at high speeds, high power requirements or special environmental conditions, it can be switched to fuel mode to extend the range or ensure power output. This flexibility not only improves the overall efficiency and performance of the vehicle, but also effectively alleviates the range anxiety of pure electric vehicles, while meeting the needs of different driving scenarios and regulatory requirements.

[0043] In view of this, in one embodiment of the present invention, at any ambient temperature, in pure electric mode: Engine 2 is not working, when there is a need to heat the passenger compartment: The water heater 8 works to heat the internal medium coolant, and the coolant is pumped into the passenger compartment heat exchanger 9 through the heating electronic water pump 7 to heat the cold air and send the heated air into the passenger compartment. The a and c water ports of the three-way proportional water valve 6 are connected to form an ac channel, forming a circulation with the heating electronic water pump 7, the water heater 8 and the passenger compartment heat exchanger 9.

[0044] The present invention heats the coolant directly by starting the water heater, and uses the heating electronic water pump to transport the hot coolant to the passenger compartment heat exchanger, thereby achieving rapid and effective heating of the passenger compartment. At the same time, the specific connection mode of the three-way proportional water valve ensures the independent operation of the heating circuit, avoids heat exchange with the engine cooling system, and improves the heating efficiency. This design can not only meet the heating needs of the passenger compartment at any ambient temperature, but also achieve zero-emission operation in pure electric mode, fully demonstrating the advantages of extended-range vehicles in energy utilization and environmental protection.

[0045] In one embodiment of the present invention, the engine is operated in the fuel priority mode when there is a heating demand in the passenger compartment.

[0046] When the external environment temperature is greater than the first preset environment temperature, for example, the first preset environment temperature is 5°C, the engine heat can be used to heat the passenger compartment, the engine electronic water pump 1 and the heating electronic water pump 7 are both working, the water heater 8 is not working, the water outlet of the three-way proportional water valve 6 is connected to form a bc&b-a channel, and the heating temperature of the passenger compartment is adjusted by adjusting the coolant flow of the bc channel; wherein: the coolant at the outlet of the engine electronic water pump 1 is heated by the engine 2 and is divided into two paths, one path goes to the oil cooler 3, and the other path goes to the thermostat 5; When the engine coolant temperature is lower than the first preset engine temperature, for example, the first preset engine temperature is 90°C, all the coolant at the thermostat 5 outlet passes through the EGR cooler 4 and enters the three-way proportional water valve 6, one way passes through the bc channel, the heating electronic water 7, and the water heater 8 to enter the passenger compartment heat exchanger 9, and the heated air is sent to the passenger compartment, and the other way passes through the ba channel and merges with the coolant at the oil cooler 3 outlet and enters the engine electronic water pump 1, forming a cycle; When the engine coolant temperature is greater than or equal to the first preset engine temperature, the thermostat 5 is fully opened. In addition to a part of the coolant at the outlet of the thermostat 5 flowing into the EGR cooler 4, a part of it will flow into the high-temperature radiator 11 while the cooling fan 10 is working. The high-temperature radiator 11 will cool the incoming high-temperature coolant. After flowing out, it will merge with the coolant at the outlet of the oil cooler 3 and the coolant at the outlet of the ba channel and then enter the engine electronic water pump 1 to form a cycle.

[0047] When the external ambient temperature is lower than the first preset ambient temperature, during cold start, since the engine body 2 has a warm-up process, it is necessary to start the water heater 8 to heat the passenger compartment. The heating electronic water pump 7, the water heater 8, the passenger compartment heat exchanger 9, and the ac channel of the three-way proportional water valve form a cycle; the engine electronic water pump 1, the engine 2, and the oil cooler 3 form a small cycle for engine heat storage; when the engine coolant temperature is greater than or equal to the preset cooler start temperature, for example, the preset cooler start temperature is 60°C, the EGR cooler 4 is turned on, the ac channel of the three-way proportional water valve 6 is switched to the bc channel, the water heater 8 is turned off, and the passenger compartment is heated by the engine circuit coolant; when there is excess heat in the passenger compartment, the bc channel of the three-way proportional water valve 6 is adjusted to the bc&b-a channel.

[0048] It should be noted that according to the actual operating conditions of the car, if it is not a cold start, it means that the engine has been warmed up, and the engine heat can be used directly to heat the passenger compartment. Generally, WPTC does not need to work, unless the ambient temperature is extremely low, the engine has just been warmed up, and the water temperature is not particularly high. For example, the water temperature is 60°C and the ambient temperature is -20°C. At this time, WPTC needs to be started for reheating, and the 60°C water continues to be heated to the target water temperature (such as 70°C). After reaching the target water temperature, WPTC exits.

[0049] In the fuel priority mode, the thermal management system of the present invention makes full use of the waste heat generated by the engine operation to meet the heating needs of the passenger compartment. By reasonably controlling the three-way proportional water valve, the engine electronic water pump and the heating electronic water pump, the system can flexibly adjust the flow direction of the coolant according to the ambient temperature and heating needs, which not only ensures the normal operating temperature of the engine, but also realizes efficient heating of the passenger compartment. This design not only improves energy utilization efficiency and reduces the use of additional heating equipment, but also can quickly provide a comfortable riding experience in low temperature environments, while providing more available power for the battery system, thereby extending the vehicle's cruising range.

[0050] In one embodiment of the present invention, in the fuel priority mode and when there is no need to heat the passenger compartment: The three-way proportional water valve 6 forms a ba channel, and the coolant at the outlet of the engine electronic water pump 1 is heated by the engine 2 and divided into two paths, one to the oil cooler 3 and the other to the thermostat 5; When the engine coolant temperature is lower than the first preset engine temperature, all the coolant at the outlet of the thermostat 5 passes through the EGR cooler 4 and enters the ba channel of the three-way proportional water valve 6, and then merges with the coolant at the outlet of the oil cooler 3 and enters the engine electronic water pump 1, forming a cycle; When the engine coolant temperature is greater than or equal to the first preset engine temperature, the thermostat 5 is fully opened, and part of its outlet coolant flows into the EGR cooler 4, and part flows into the high-temperature radiator 11. At the same time, the cooling fan 10 works, and the high-temperature radiator 11 cools the incoming high-temperature coolant. The cooled coolant merges with the outlet coolant of the oil cooler 3 and the outlet coolant of the ba channel of the three-way proportional water valve 6 and enters the engine electronic water pump 1 to form a cycle.

[0051] In summary, the engine electronic water pump 1 mainly provides circulation power for the engine circuit coolant to prevent the engine coolant from not circulating and causing the engine to overheat, thereby limiting the torque of the vehicle to the point of breaking down. In order to reduce the risk of breaking down caused by the failure of the engine electronic water pump 1, Figure 2 and Figure 3 As shown, the present invention further proposes a restricted travel mode.

[0052] In one embodiment of the present invention, when the engine electronic water pump 1 fails, the ECM (Engine Control Module) collects fault information and reports DTC, and the ZCU (Zonal Control Unit) judges the DTC. If the fault is eliminated, the vehicle runs normally. If the fault still exists, the thermal management circuit switches to the restricted mode: the three-way proportional water valve 6 switches to the bc channel, and the heating electronic water pump 7 runs at the maximum duty cycle, and runs in series with the engine electronic water pump 1 to provide circulation power for the engine circuit coolant.

[0053] Specifically, the vehicle restriction mode is refined according to the engine coolant temperature, including: The engine coolant temperature is obtained and determined, and the following restricted driving mode is generated based on the determination result, wherein the engine coolant temperature can be understood as the engine water temperature: ① When the engine coolant temperature is lower than or equal to the first preset engine temperature, such as lower than 90°C, the three-way proportional water valve 6 connects the engine cooling circuit and the passenger compartment warm air circulation circuit in series, the b and c water ports of the three-way proportional water valve 6 are connected to form a bc channel, the thermostat 5 is half-open, the heating electronic water pump 7 operates at the maximum duty cycle, the engine 2 has no speed limit, the thermal management system responds normally, and the HMI lights up the yellow power system fault light to remind the user to enter the station for maintenance. The engine electronic water pump 1 fails and does not operate, and the engine 2 is used as a channel. The outlet coolant of the heating electronic water pump 7 passes through the water heater 8 (the water heater 8 does not work) and the passenger compartment heat exchanger 9 (circulation, no heat dissipation function), and then enters the oil cooler 3 one way and the engine electronic water pump 1 one way. After flowing out, it enters the engine 2 to equalize the temperature of the engine body, and after flowing out, it merges with the outlet coolant of the oil cooler 3, and enters the EGR cooler 4 and the three-way proportional water valve 6. ② When the engine coolant temperature is higher than the first preset engine temperature but lower than or equal to the second preset engine temperature, for example, the second preset engine temperature is 100°C, and the engine coolant temperature is higher than 90°C but lower than or equal to 100°C, the three-way proportional water valve 6 connects the engine cooling circuit and the passenger compartment warm air circulation circuit in series, the b and c water ports of the three-way proportional water valve 6 are connected to form a bc channel, the thermostat 5 is fully opened, the heating electronic water pump 7 operates at the maximum duty cycle, the cooling fan 10 operates at the maximum duty cycle, the engine speed is limited to the first preset speed such as limited to 3500rpm, the thermal management system responds normally, and the HMI lights up the yellow power system fault light to remind the user to enter the station for maintenance. The engine electronic water pump 1 fails and does not operate, and the engine 2 serves as a channel. The coolant at the outlet of the heating electronic water pump 7 passes through the water heater 8 (the water heater 8 does not work) and the passenger compartment heat exchanger 9 (circulating, without heat dissipation function), and then is divided into three paths. One path enters the oil cooler 3, one path passes through the engine electronic water pump 1, and after flowing out, enters the engine body 2 to equalize the temperature and cool the engine body, and one path enters the high-temperature radiator 11 for cooling. After the three are combined, they enter the EGR cooler 4 and the three-way proportional water valve 6. ③ When the engine coolant temperature is higher than the second preset engine temperature but lower than or equal to the third preset engine temperature, for example, the third preset engine temperature is 105°C, and the engine coolant temperature is higher than 100°C but lower than or equal to 105°C, the three-way proportional water valve 6 connects the engine cooling circuit and the passenger compartment warm air circulation circuit in series, the b and c water ports of the three-way proportional water valve 6 are connected to form a bc channel, the thermostat 5 is fully opened, the heating electronic water pump 7 runs at the maximum duty cycle, the cooling fan 10 runs at the maximum duty cycle, the engine speed is limited to the second preset speed such as limited to 3000rpm, the thermal management system responds normally, and the HMI lights up the yellow power system fault light to remind the user to enter the station for maintenance. The engine electronic water pump 1 fails and does not operate, and the engine 2 serves as a channel. The coolant at the outlet of the heating electronic water pump 7 passes through the water heater 8 (the water heater 8 does not work) and the passenger compartment heat exchanger 9 (circulating, without heat dissipation function), and then is divided into three paths. One path enters the oil cooler 3, one path passes through the engine electronic water pump 1, and after flowing out, enters the engine body 2 to equalize the temperature and cool the engine body, and one path enters the high-temperature radiator 11 for cooling. After the three are combined, they enter the EGR cooler 4 and the three-way proportional water valve 6. ④ When the engine coolant temperature is higher than the third preset engine temperature, for example, the third preset engine temperature is 105°C, the three-way proportional water valve 6 connects the engine cooling circuit and the passenger compartment warm air circulation circuit in series, the b and c water ports of the three-way proportional water valve 6 are connected to form a bc channel, the thermostat 5 is fully opened, the heating electronic water pump 7 operates at the maximum duty cycle, the cooling fan 10 operates at the maximum duty cycle, the engine speed is limited to the third preset speed, such as 2500rpm, the thermal management system responds normally, and the HMI lights up the yellow power system fault light to remind the user to enter the station for maintenance. The engine electronic water pump 1 fails and does not operate, and the engine 2 is used as a channel. The coolant at the outlet of the heating electronic water pump 7 passes through the water heater 8 (the water heater 8 does not work) and the passenger compartment heat exchanger 9 (circulation, no heat dissipation function), and then is divided into three paths after coming out. One path enters the oil cooler 3, one path passes through the engine electronic water pump 1, and then flows out and enters the engine body 2 to equalize the temperature and cool the engine body, and one path enters the high-temperature radiator 11 for cooling. After the three are combined, they enter the EGR cooler 4 and the three-way proportional water valve 6. After limiting the third preset speed, such as 2500 rpm, if the engine water temperature exceeds a fourth preset temperature, such as 115° C., the engine is judged to be overheated and the vehicle breaks down, wherein the fourth preset temperature can be understood as a normal operating value.

[0054] Here, the present invention provides a multi-level thermal management control strategy for engine electronic water pump failures. By dynamically adjusting the working mode of the three-way proportional water valve, the operating state of the heating electronic water pump, the operating state of the cooling fan, and the engine speed limit according to different thresholds of the engine coolant temperature, precise control of the engine temperature is achieved. This hierarchical control method can not only maintain the basic cooling function of the engine in the event of a water pump failure, but also adjust the system response in time according to temperature changes, effectively preventing the engine from overheating. At the same time, fault reminders are provided through the human-machine interface to ensure driving safety. While ensuring vehicle reliability, this strategy maximizes the vehicle's emergency driving capability, provides users with a safer and more reliable driving experience, and can solve problems such as vehicle breakdowns caused by engine water pump failures.

[0055] It should be noted that the various temperature thresholds mentioned in the present invention, such as 90°C, 100°C, 105°C and 115°C, are only exemplary reference values. These specific values ​​may be adjusted according to factors such as different vehicle models, engine types, cooling system designs, and actual application environments. At the same time, the temperature conditions described in the present invention, such as "greater than", "less than", "equal to", "greater than or equal to" or "less than or equal to" a certain temperature value, and their specific comparison methods are not the core of the present invention. Those skilled in the art can, according to specific circumstances and needs, without departing from the principles of the present invention, appropriately modify and optimize these temperature parameters and their comparison methods to achieve the best thermal management effect and vehicle performance.

[0056] like Figure 2 and Figure 3 As shown, the second aspect of the present invention provides a thermal management control method for an extended-range vehicle, comprising: when an engine water pump fails: The engine cooling circuit and the passenger compartment warm air circulation circuit are connected in series, and the vehicle enters restricted driving mode by controlling the heating electronic water pump.

[0057] In one embodiment of the present invention, a method for determining an engine water pump failure includes: The vehicle's engine control module collects fault information and reports DTC; The zone controller determines the DTC; It is determined whether the vehicle enters the restricted mode based on the determination result.

[0058] In one embodiment of the present invention, a three-way proportional water valve is also included; wherein: The engine cooling circuit is composed of an engine electronic water pump, an engine, an oil cooler, a thermostat, an EGR cooler, a cooling fan, and a high-temperature radiator;

[0059] The passenger compartment heating system is composed of a three-way proportional water valve, a heating electronic water pump, a water heater WPTC, and a passenger compartment heat exchanger; WPTC specifically refers to water PTC, which is used to heat liquids. In addition, there are APTC and air PTC in the industry, which are used to heat air. The three-way proportional water valve includes three water ports a, b, and c. When the b and c water ports of the three-way proportional water valve are connected to form a bc channel, the engine cooling circuit and the passenger compartment warm air circulation circuit are connected in series.

[0060] In one embodiment of the present invention, the engine cooling circuit and the passenger compartment warm air circulation circuit are connected in series, and the vehicle enters the restricted mode by controlling the heating electronic water pump, including: Obtain and determine the engine coolant temperature; When the engine coolant temperature is lower than or equal to a first preset engine temperature, the thermostat is half-open, the heating electronic water pump operates at a maximum duty cycle, the engine speed is not limited, and the thermal management system responds normally; and / or When the engine coolant temperature is higher than the first preset engine temperature but lower than or equal to the second preset engine temperature, all thermostats are opened, the heating electronic water pump operates at the maximum duty cycle, the cooling fan operates at the maximum duty cycle, the engine speed is limited to the first preset speed, and the thermal management system responds normally; and / or When the engine coolant temperature is higher than the second preset engine temperature but lower than or equal to the third preset engine temperature, all thermostats are opened, the heating electronic water pump operates at a maximum duty cycle, the cooling fan operates at a maximum duty cycle, the engine speed is limited to a second preset speed, and the thermal management system responds normally; and / or When the engine coolant temperature is higher than the third preset engine temperature, the heating electronic water pump operates at a maximum duty cycle, all thermostats are opened, the cooling fan operates at a maximum duty cycle, the engine speed is limited to a third preset speed, and the thermal management system responds normally.

[0061] The thermal management control method for extended-range vehicles provided by the present invention effectively solves the serious consequences that may be caused by the failure of the engine electronic water pump in the prior art. By utilizing the heating electronic water pump and the three-way proportional water valve, the series connection of the engine cooling circuit and the passenger compartment heating circuit is achieved when the engine electronic water pump fails, and the engine speed limit and the cooling fan operating status are dynamically adjusted according to the coolant temperature. This multi-level control strategy not only maintains the basic cooling function of the engine and effectively prevents the engine from overheating, but also provides the driver with enough time to safely stop or seek rescue. At the same time, the method also takes into account the special needs of extended-range vehicles in different operating modes, realizes the intelligent control of the thermal management system, improves the system reliability and energy utilization efficiency, and thus significantly improves the overall safety and performance of the vehicle.

[0062] A third aspect of the present invention provides an extended-range vehicle, comprising a thermal management system for the extended-range vehicle as described in any one of the above embodiments.

[0063] like Figure 4 As shown, the fourth aspect of the present invention provides an electronic device, including: At least one processor; and at least one memory in communication with the processor, wherein: the memory stores program instructions executable by the processor, and the processor calls the program instructions to execute the steps of the method described in any one of the above embodiments.

[0064] A fifth aspect of the present invention discloses a readable storage medium storing a computer program, wherein the computer program is executed by a processor to perform the steps of the method described in any one of the above embodiments.

[0065] Computer-readable storage media may include: any entity or device capable of carrying a computer program, a recording medium, a USB flash drive, a mobile hard disk, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), and a software distribution medium, etc. A computer program includes a computer program code. The computer program code may be in source code form, object code form, an executable file, or some intermediate form, etc. A computer-readable storage medium may include: any entity or device capable of carrying a computer program code, a recording medium, a USB flash drive, a mobile hard disk, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), and a software distribution medium, etc.

[0066] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0067] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, apparatus or device (such as a computer-based system, a system including a processing module, or other system that can fetch instructions from an instruction execution system, apparatus or device and execute instructions), or used in combination with these instruction execution systems, apparatuses or devices.

[0068] Systems and methods have been generally described herein as details that aid in understanding the present invention. In addition, various specific details have been given to provide an overall understanding of embodiments of the present invention. However, those skilled in the relevant art will recognize that embodiments of the present invention may be practiced without one or more of the specific details, or may be practiced using other devices, systems, accessories, methods, components, materials, parts, etc. In other cases, well-known structures, materials, and / or operations are not specifically shown or described in detail to avoid confusion with various aspects of embodiments of the present invention.

[0069] Thus, although the invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the foregoing disclosure, and it should be understood that in some cases, some features of the invention will be employed without the corresponding use of other features without departing from the scope and spirit of the proposed invention. Thus, many modifications may be made to adapt a particular environment or material to the essential scope and spirit of the invention. The invention is not intended to be limited to the specific terms used in the claims below and / or the specific embodiments disclosed as the best mode contemplated for carrying out the invention, but the invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Thus, the scope of the invention will be determined solely by the appended claims.

Claims

1. A thermal management control system for an extended-range vehicle, characterized in that: include: An engine cooling circuit, including at least an engine, an engine electronic water pump and a cooling fan; The passenger compartment heating circuit includes at least a heating electronic water pump; a valve body assembly, at least for selectively providing heat provided by the engine cooling circuit to the passenger compartment through the passenger compartment heating circuit; as well as When the engine electronic water pump fails, the engine cooling circuit and the passenger compartment warm air circulation circuit are connected in series through the valve body assembly, and the engine speed limit and / or the cooling fan operating state are selectively adjusted based on the engine coolant temperature.

2. The extended-range vehicle thermal management control system according to claim 1, characterized in that: The engine cooling circuit also includes an oil cooler, a thermostat, an EGR cooler and a high-temperature radiator; The passenger compartment heating circuit also includes a water heater and a passenger compartment heat exchanger; The valve body assembly is a three-way proportional water valve, which includes three water ports a, b and c, wherein: The a and c water ports of the three-way proportional water valve are connected to form an ac channel; The water ports b and a of the three-way proportional water valve are connected to form a channel ba; The b and c water ports of the three-way proportional water valve are connected to form a bc channel.

3. The extended-range vehicle thermal management control system according to claim 2, characterized in that: In pure electric mode and when there is a need to heat the passenger compartment: Engine not working: The water heater heats the internal medium coolant, and pumps the coolant into the passenger compartment heat exchanger through the heating electronic water pump to heat the cold air and send the heated air into the passenger compartment. The a and c water ports of the three-way proportional water valve are connected to form an ac channel, forming a circulation with the heating electronic water pump, water heater and passenger compartment heat exchanger.

4. The extended-range vehicle thermal management control system according to claim 2, characterized in that: In fuel priority mode and when there is a demand for passenger compartment heating: The engine is operating; of which: When the external environment temperature is greater than the first preset environment temperature, the engine electronic water pump and the heating electronic water pump both work, the water heater does not work, the water outlets of the three-way proportional water valve are connected to form bc & b-a channels, and the heating temperature of the passenger compartment is adjusted by adjusting the coolant flow rate of the bc channel; wherein: the coolant at the outlet of the engine electronic water pump is divided into two paths after being heated by the engine, one path goes to the oil cooler, and the other path goes to the thermostat; When the engine coolant temperature is lower than the first preset engine temperature, all the coolant at the thermostat outlet passes through the EGR cooler and enters the three-way proportional water valve; one path passes through the bc channel, the heating electronic water pump, and the water heater and enters the passenger compartment heat exchanger, and the heated air is sent to the passenger compartment; the other path passes through the ba channel and merges with the coolant at the oil cooler outlet and enters the engine electronic water pump, forming a cycle; When the engine coolant temperature is approximately equal to the first preset engine temperature, the thermostats are fully opened. In addition to a part of the outlet coolant flowing into the EGR cooler, a part will flow into the high-temperature radiator and the cooling fan will work at the same time. The high-temperature radiator will cool the incoming high-temperature coolant. After flowing out, it will merge with the oil cooler outlet coolant and the ba channel outlet coolant and enter the engine electronic water pump to form a cycle.

5. The extended-range vehicle thermal management control system according to claim 2, characterized in that: In fuel priority mode and when there is a demand for passenger compartment heating: The engine is operating; of which: When the external ambient temperature is lower than the first preset ambient temperature, during cold start, the water heater heats the passenger compartment, and the heating electronic water pump, water heater, passenger compartment heat exchanger, and ac channel of the three-way proportional water valve form a loop; the engine electronic water pump, engine, and oil cooler form a loop for engine heat storage; when the engine coolant temperature is higher than the preset cooler start temperature, the EGR cooler opens, the ac channel of the three-way proportional water valve switches to the bc channel, the water heater closes, and the passenger compartment is heated by the engine circuit coolant; when there is excess heat in the passenger compartment, the bc channel of the three-way proportional water valve is adjusted to the bc&b-a channel.

6. The extended-range vehicle thermal management control system according to claim 2, characterized in that: In fuel priority mode and when there is no demand for passenger compartment heating: The three-way proportional water valve forms the ba channel. The coolant at the outlet of the engine electronic water pump is heated by the engine and divided into two paths, one entering the oil cooler and the other entering the thermostat. When the engine coolant temperature is lower than the first preset engine temperature, all the coolant at the thermostat outlet passes through the EGR cooler and enters the ba channel of the three-way proportional water valve, and then merges with the coolant at the oil cooler outlet and enters the engine electronic water pump, forming a cycle; When the engine coolant temperature is greater than or equal to the first preset engine temperature, the thermostats are fully opened, and part of the outlet coolant flows into the EGR cooler, and part flows into the high-temperature radiator. At the same time, the cooling fan works, and the high-temperature radiator cools the incoming high-temperature coolant. The cooled coolant merges with the outlet coolant of the oil cooler and the outlet coolant of the ba channel of the three-way proportional water valve and then enters the engine electronic water pump to form a cycle.

7. The extended-range vehicle thermal management control system according to claim 1 or 2, characterized in that: include: Obtain and determine the engine coolant temperature; When the engine coolant temperature is lower than or equal to the first preset engine temperature, the thermostat is half-open, the heating electronic water pump operates at the maximum duty cycle, the engine speed is not limited, and the thermal management system responds normally; and / or When the engine coolant temperature is higher than the first preset engine temperature but lower than or equal to the second preset engine temperature, all thermostats are opened, the heating electronic water pump operates at the maximum duty cycle, the cooling fan operates at the maximum duty cycle, the engine speed is limited to the first preset speed, and the thermal management system responds normally; and / or When the engine coolant temperature is higher than the second preset engine temperature but lower than or equal to the third preset engine temperature, all thermostats are opened, the heating electronic water pump operates at a maximum duty cycle, the cooling fan operates at a maximum duty cycle, the engine speed is limited to the second preset speed, and the thermal management system responds normally; and / or When the engine coolant temperature is higher than the third preset engine temperature, all thermostats are opened, the heating electronic water pump operates at the maximum duty cycle, the cooling fan operates at the maximum duty cycle, the engine speed is limited to the third preset speed, and the thermal management system responds normally.

8. The extended-range vehicle thermal management control system according to claim 1, characterized in that: include: If the engine coolant temperature is higher than the fourth preset temperature after the engine speed is limited to the third preset speed, it is determined that the engine is overheated and the vehicle breaks down.

9. A thermal management control method for an extended-range vehicle, characterized in that: include: When the engine water pump fails: The engine cooling circuit and the passenger compartment warm air circulation circuit are connected in series, and the vehicle enters restricted driving mode by controlling the heating electronic water pump.

10. The extended-range vehicle thermal management control method according to claim 9, characterized in that: include: The methods for judging engine water pump failure include: The vehicle's engine control module collects fault information and reports DTC; The zone controller determines the DTC; It is determined whether the vehicle enters the restricted mode based on the determination result.

11. The extended-range vehicle thermal management control method according to claim 9, characterized in that: There is a three-way proportional water valve; among which: The engine cooling circuit is composed of an engine electronic water pump, an engine, an oil cooler, a thermostat, an EGR cooler, a cooling fan, and a high-temperature radiator; The passenger compartment heating system is composed of a three-way proportional water valve, a heating electronic water pump, a water heater WPTC, and a passenger compartment heat exchanger; The three-way proportional water valve comprises three water ports a, b and c. When the water ports b and c of the three-way proportional water valve are connected to form a bc channel, the engine cooling circuit and the passenger compartment warm air circulation circuit are connected in series.

12. The extended-range vehicle thermal management control method according to claim 11, characterized in that: The engine cooling circuit and the passenger compartment warm air circulation circuit are connected in series, and the vehicle enters the restricted mode by controlling the heating electronic water pump, including: Obtain and determine the engine coolant temperature; When the engine coolant temperature is lower than or equal to a first preset engine temperature, the thermostat is half-open, the heating electronic water pump operates at a maximum duty cycle, the engine speed is not limited, and the thermal management system responds normally; and / or When the engine coolant temperature is higher than the first preset engine temperature but lower than or equal to the second preset engine temperature, all thermostats are opened, the heating electronic water pump operates at the maximum duty cycle, the cooling fan operates at the maximum duty cycle, the engine speed is limited to the first preset speed, and the thermal management system responds normally; and / or When the engine coolant temperature is higher than the second preset engine temperature but lower than or equal to the third preset engine temperature, all thermostats are opened, the heating electronic water pump operates at a maximum duty cycle, the cooling fan operates at a maximum duty cycle, the engine speed is limited to a second preset speed, and the thermal management system responds normally; and / or When the engine coolant temperature is higher than the third preset engine temperature, the heating electronic water pump operates at a maximum duty cycle, all thermostats are opened, the cooling fan operates at a maximum duty cycle, the engine speed is limited to a third preset speed, and the thermal management system responds normally.

13. An extended-range vehicle, comprising the extended-range vehicle thermal management system according to any one of claims 1 to 8.

14. An electronic device, characterized in that: include: at least one processor; and at least one memory communicatively connected to the processor, wherein: the memory stores program instructions executable by the processor, and the processor calls the program instructions to execute the steps of the method according to claim 9 or 12.

15. A readable storage medium storing a computer program, characterized in that: The computer program is used by a processor to execute the steps of the method according to claim 9 or 12.

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