A control system and control method for low-temperature warm-up of a vehicle

Abstract

The application provides a control system and a control method for low-temperature preheating of an automobile. The control system comprises a heat exchange pipe, an output end of the heat exchange pipe outputs preheating medium at a first temperature to preheat an engine module, a first cooling module is arranged between the engine module and a motor module, and is used for cooling the preheating medium to a second temperature, the preheating medium at the second temperature is used for preheating the motor module to a corresponding working requirement temperature thereof; a second cooling module is arranged between the motor module and a battery module, and is used for cooling the preheating medium to a third temperature, the preheating medium at the third temperature is used for preheating the battery module to a corresponding working requirement temperature thereof; and the corresponding working requirement temperatures of the engine module, the motor module and the battery module decrease in sequence. The scheme shares the same high-quality heat source, utilizes a set of preheating system to preheat all power modules of the automobile at low temperature, simplifies pipeline arrangement, saves vehicle body space and internal energy consumption, and conforms to the energy-saving and emission-reducing trend.

Description

Technical Field

[0001] This application relates to the field of vehicle low-temperature preheating technology, specifically to a control system and control method for vehicle low-temperature preheating. Background Technology

[0002] Low-temperature preheating, a key technology in the automotive field, is receiving increasing attention in the context of low-carbon and energy-saving development. Low-temperature preheating refers to controlling power components such as internal combustion engines, generators, motors, and batteries to quickly reach suitable operating temperatures, thereby reducing low-temperature energy consumption and increasing power output stability. However, different power components have different preheating methods and energy consumption during the preheating process. Internal combustion engine preheating involves preheating the engine oil and coolant through fuel injection and combustion, and preheating the three-way catalytic converter through exhaust gas. Batteries generally heat the coolant through an external heat source, which in turn heats the battery. Oil-cooled motors and generators typically heat the coolant through an external heat source, then heat the lubricating oil in the motor through a heat exchanger, or internally by heating the stator and rotor through electricity.

[0003] It is evident that, for the preheating of different power components, since each power component has its own suitable operating temperature and these suitable temperatures are different, the existing technology often requires different external heat sources and independent preheating systems to preheat different power components. Setting up multiple independent preheating systems means that complicated piping needs to be laid out, which will occupy a lot of space and is not conducive to the design of the car body. Moreover, setting up different heat sources and independent preheating systems goes against the environmental protection trend of energy conservation and emission reduction. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, this application aims to provide a control system and control method for vehicle low-temperature preheating.

[0005] The first aspect of this application provides a vehicle low-temperature preheating control system, comprising:

[0006] A heat exchange tube has a medium output end; the medium output end outputs a preheating medium at a first temperature, and an engine module, a motor module, and a battery module are sequentially connected to the medium output end of the heat exchange tube; the preheating medium at the first temperature is used to preheat the engine module to its corresponding operating temperature requirement.

[0007] A first cooling module is located between the engine module and the motor module. The first cooling module is used to cool the preheating medium to a second temperature. The preheating medium at the second temperature is used to preheat the motor module to its corresponding operating temperature.

[0008] The second cooling module is located between the motor module and the battery module. The second cooling module is used to cool the preheating medium to a third temperature. The preheating medium at the third temperature is used to preheat the battery module to its corresponding operating temperature. The corresponding operating temperatures of the engine module, the motor module, and the battery module decrease sequentially.

[0009] According to the technical solution provided in the embodiments of this application, the first cooling module includes:

[0010] The first heat dissipation unit outputs the preheating medium at the second temperature at its output terminal, and the output terminal of the first heat dissipation unit is connected to the input terminal of the motor module.

[0011] The first heat dissipation unit has a first state and a second state. In the first state, the input end of the first heat dissipation unit is connected to the medium output end. In the second state, the input end of the first heat dissipation unit is connected to the output end of the engine module.

[0012] A first control unit is configured to control the first heat dissipation unit to switch between the first state and the second state.

[0013] According to the technical solution provided in the embodiments of this application, the second cooling module includes:

[0014] The second heat dissipation unit outputs the preheating medium at the third temperature at its output terminal, and the output terminal of the second heat dissipation unit is connected to the input terminal of the battery module.

[0015] The second heat dissipation unit has a third state and a fourth state. In the third state, the input terminal of the second heat dissipation unit is connected to the output terminal of the motor module. In the fourth state, the input terminal of the second heat dissipation unit is connected to the output terminal of the first heat dissipation unit.

[0016] The second control unit is used to control the second heat dissipation unit to switch between the third state and the fourth state.

[0017] According to the technical solution provided in the embodiments of this application, the heat exchange tube is located on the side of the catalytic core of the three-way catalytic converter of the vehicle away from the intake pipe.

[0018] According to the technical solution provided in the embodiments of this application, the output end of the battery module is connected to the medium input end of the heat exchange tube through a first pipe. A spray assembly is provided on the first pipe. When the temperature of the three-way catalytic converter is greater than or equal to a first preset temperature, the spray assembly sprays the preheating medium onto the three-way catalytic converter.

[0019] According to the technical solution provided in the embodiments of this application, the first cooling module further includes:

[0020] A first temperature acquisition unit is configured to acquire the first initial temperature of the preheating medium input at the input terminal of the first heat dissipation unit.

[0021] The first control unit is further configured to obtain a corresponding first cooling duration based on the first initial temperature, and control the first heat dissipation unit to cool the preheating medium for the first cooling duration.

[0022] According to the technical solution provided in the embodiments of this application, the second cooling module further includes:

[0023] The second temperature acquisition unit is configured to acquire the second initial temperature of the preheating medium input at the input terminal of the second heat dissipation unit;

[0024] The second control unit is further configured to obtain a corresponding second cooling duration based on the second initial temperature, and control the second heat dissipation unit to cool the preheating medium for the second cooling duration.

[0025] According to the technical solution provided in the embodiments of this application, the engine module includes a first exhaust assembly, which is used to exhaust the preheating medium in the engine module.

[0026] According to the technical solution provided in the embodiments of this application, the second preheating unit includes a second exhaust assembly, which is used to exhaust the preheating medium in the motor module.

[0027] A second aspect of this application provides a method for controlling vehicle low-temperature preheating, comprising the following steps:

[0028] Receive the preheating request signal from the engine module and connect the medium output end of the heat exchange tube to the input end of the engine module;

[0029] Upon receiving a preheating request signal from the motor module, the first cooling module is switched to the on state, and the output terminal of the first cooling module is connected to the input terminal of the motor module. The output terminal of the first cooling module outputs the preheating medium at a second temperature.

[0030] Upon receiving a preheating request signal from the battery module, the second cooling module is switched to the on state, and the output terminal of the second cooling module is connected to the input terminal of the battery module. The output terminal of the second cooling module outputs the preheating medium at a third temperature.

[0031] Compared with the prior art, the beneficial effects of this application are as follows: Based on the suitable operating temperature of each power module of the hybrid vehicle, the engine module, motor module, and battery module are arranged sequentially in the direction away from the heat exchange pipe. The preheating medium flowing out of the heat exchange pipe first preheats the engine module, then is cooled by the first cooling module before entering the motor module for preheating, and then is cooled by the second cooling module before entering the battery module for preheating. This solution can achieve the goal of preheating all the power modules of the vehicle to the suitable operating temperature required by each power module by sharing the same high-quality heat source and using a set of preheating system in a low-temperature environment, so that the whole vehicle can quickly enter the optimal working state. This not only simplifies the pipeline layout and saves body space and internal energy consumption, but also conforms to the environmental protection trend of energy conservation and emission reduction. Attached Figure Description

[0032] Figure 1 A schematic diagram of the structure of a vehicle low-temperature preheating control system provided in an embodiment of this application;

[0033] Figure 2 This is a connection diagram of the various power modules of the vehicle provided in the embodiments of this application;

[0034] Figure 3 A flowchart illustrating the steps of a vehicle low-temperature preheating control system method provided in an embodiment of this application;

[0035] Figure 4 This is a schematic diagram of one of the coiled structures of the heat exchange tube provided in the embodiments of this application;

[0036] Figure 5 This is a schematic diagram of another coiled structure of the heat exchange tube provided in an embodiment of this application.

[0037] The text labels in the image represent:

[0038] 1. Heat exchanger tube; 11. Medium output end; 2. Catalytic core; 3. Three-way catalytic converter; 31. Inlet pipe; 32. Outlet pipe; 4. First valve; 5. Engine module; 6. First cooling module; 7. Motor module; 8. Second cooling module; 9. Battery module; 10. Spray assembly. Detailed Implementation

[0039] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0041] Example 1

[0042] Please refer to Figure 1 This embodiment provides a vehicle low-temperature preheating control system, including:

[0043] The heat exchange tube 1 has a medium output end 11; the medium output end 11 outputs a preheating medium at a first temperature, and the heat exchange tube 1 is connected in sequence to the medium output end 11 side to the engine module 5, the motor module 7 and the battery module 9; the preheating medium at the first temperature is used to preheat the engine module 5 to its corresponding operating temperature.

[0044] The first cooling module 6 is located between the engine module 5 and the motor module 7. The first cooling module 6 is used to cool the preheating medium to a second temperature. The preheating medium at the second temperature is used to preheat the motor module 7 to its corresponding operating temperature.

[0045] The second cooling module 8 is located between the motor module 7 and the battery module 9. The second cooling module 8 is used to cool the preheating medium to a third temperature. The preheating medium at the third temperature is used to preheat the battery module 9 to its corresponding operating temperature. The operating temperatures of the engine module 5, the motor module 7 and the battery module 9 decrease sequentially.

[0046] Specifically, the coolant of the vehicle power module flows through the heat exchange tube and absorbs heat to form a preheating medium at the first temperature. The engine module 5 is provided with a first valve 4 on the side away from the motor module 7. In a low-temperature environment (outside temperature / inside coolant temperature less than or equal to minus 5 degrees Celsius), the system enters a low-temperature preheating condition. The first valve 4 controls the medium output terminal 11 to output the preheating medium at the first temperature.

[0047] Specifically, each of the engine module 5, the motor module 7, the battery module 9, the first cooling module 6, and the second cooling module 8 has a preheating pipe within its respective module for the flow of the preheating medium. The pipe is arranged to be coiled around the components of each module. The engine module 5 includes at least an engine water jacket and an engine oil cooler. The motor module 7 includes at least a generator oil cooler and a motor oil cooler. The battery module 9 includes at least a battery plate heat exchanger and a battery. Each power module has a fluid pump, which is used to draw in or discharge the preheating medium to each power module.

[0048] Optionally, the required operating temperature for the engine module 5 is 120 degrees Celsius, the required operating temperature for the motor module 7 is 60 degrees Celsius, and the required operating temperature for the battery module 9 is 40 degrees Celsius. The first temperature is greater than 120 degrees Celsius and less than 300 degrees Celsius, and the heat provided by the preheating medium at the first temperature is just enough to preheat each component in the engine module 5 to approximately 120 degrees Celsius. The second temperature is greater than 60 degrees Celsius and less than 120 degrees Celsius, and the heat provided by the preheating medium at the second temperature is just enough to preheat each component in the motor module 7 to approximately 60 degrees Celsius. The third temperature is greater than 40 degrees Celsius and less than 60 degrees Celsius, and the heat provided by the preheating medium at the third temperature is just enough to preheat each component in the battery module 9 to approximately 40 degrees Celsius.

[0049] Specifically, the first valve 4 can also control the medium output end 11 of the heat exchange tube 1 to connect with the crew cabin heating system. When the crew cabin has heating needs, the preheating medium at the first temperature can also be used to heat the crew cabin, enriching the function of the entire preheating system and maximizing the recovery and utilization of heat generated by high-quality heat sources.

[0050] In low-temperature environments, the same high-quality heat source and the same preheating system are used. Through the layout design of each power module and the gradient cooling between each power module, the power modules of the whole vehicle are preheated to the appropriate working temperature required by each power module, so that the whole vehicle can quickly enter the optimal working state, simplify the pipeline layout, save body space and internal energy consumption, and conform to the environmental protection trend of energy conservation and emission reduction.

[0051] In a preferred embodiment, the first cooling module 6 includes:

[0052] The first heat dissipation unit outputs the preheating medium at the second temperature at its output terminal, and the output terminal of the first heat dissipation unit is connected to the input terminal of the motor module 7.

[0053] The first heat dissipation unit has a first state and a second state. In the first state, the input end of the first heat dissipation unit is connected to the medium output end 11. In the second state, the input end of the first heat dissipation unit is connected to the output end of the engine module 5.

[0054] A first control unit is configured to control the first heat dissipation unit to switch between the first state and the second state.

[0055] Specifically, in low-temperature environments, for special operating conditions encountered by users when using the vehicle, when only the motor module and the battery module need to work, there is no need to preheat the engine module. At this time, by switching the state of the first heat dissipation unit, the preheating medium at the first temperature can be directly introduced into the first heat dissipation unit for cooling without flowing through the engine module, and then used to preheat the motor module and the battery module. This targeted preheating strategy allows the vehicle to quickly enter the working state under this condition.

[0056] In a preferred embodiment, the second cooling module 8 includes:

[0057] The second heat dissipation unit outputs the preheating medium at the third temperature at its output terminal, and the output terminal of the second heat dissipation unit is connected to the input terminal of the battery module 9.

[0058] The second heat dissipation unit has a third state and a fourth state. In the third state, the input terminal of the second heat dissipation unit is connected to the output terminal of the motor module 7. In the fourth state, the input terminal of the second heat dissipation unit is connected to the output terminal of the first heat dissipation unit.

[0059] The second control unit is used to control the second heat dissipation unit to switch between the third state and the fourth state.

[0060] Specifically, in low-temperature environments, for special operating conditions encountered by users when using the vehicle, when only the engine module and the battery module need to work, there is no need to preheat the motor module. At this time, by switching the state of the second heat dissipation unit, the preheating medium flowing out of the first heat dissipation unit can be directly introduced into the second heat dissipation unit for cooling and preheating of the battery module without flowing through the motor module. This targeted preheating strategy allows the vehicle to quickly enter the working state under this condition.

[0061] In a preferred embodiment, the first cooling module 6 further includes:

[0062] A first temperature acquisition unit is configured to acquire the first initial temperature of the preheating medium input at the input terminal of the first heat dissipation unit.

[0063] The first control unit is further configured to obtain a corresponding first cooling duration based on the first initial temperature, and control the first heat dissipation unit to cool the preheating medium for the first cooling duration.

[0064] Specifically, the first temperature acquisition unit is further configured to acquire the temperature of the preheating medium at the output end of the first heat dissipation unit, which is the first output temperature after cooling; the first control unit is further configured to control the output end of the first heat dissipation unit to open when the absolute value of the difference between the first output temperature and the second temperature is less than or equal to a first threshold. Optionally, the first threshold is an equivalent temperature of 1 degree Celsius or 2 degrees Celsius; preferably, the absolute value of the difference between the first output temperature and the second temperature is equal to 0.

[0065] In a preferred embodiment, the second cooling module 8 further includes:

[0066] The second temperature acquisition unit is configured to acquire the second initial temperature of the preheating medium input at the input terminal of the second heat dissipation unit;

[0067] The second control unit is further configured to obtain a corresponding second cooling duration based on the second initial temperature, and control the second heat dissipation unit to cool the preheating medium for the second cooling duration.

[0068] Specifically, the second temperature acquisition unit is further configured to acquire the temperature of the preheating medium at the output end of the second heat dissipation unit, which is the second output temperature after cooling; the second control unit is further configured to control the output end of the second heat dissipation unit to open when the absolute value of the difference between the second output temperature and the third temperature is less than or equal to a second threshold. Optionally, the second threshold is an equivalent temperature of 1 degree Celsius or 2 degrees Celsius; preferably, the absolute value of the difference between the second output temperature and the third temperature is equal to 0.

[0069] Specifically, a cooling database is established based on past experience and existing data. This database includes the initial temperatures of multiple preheating media and the corresponding cooling times for each initial temperature. The cooling database is shown in Table 1.

[0070] Table 1 Cooling Database

[0071] Cooling time <![CDATA[t1]]> <![CDATA[t2]]> <![CDATA[t3]]> <![CDATA[t4]]> ...... <![CDATA[t n ]]>

[0072] The working principle of the first heat dissipation unit is as follows: after the first temperature acquisition unit acquires the first initial temperature, it sends the first initial temperature signal to the first control unit. The first control unit calls the cooling database and controls the cooling time of the first heat dissipation unit to be the first cooling duration based on the first initial temperature. After the first heat dissipation unit cools the preheating medium, the first temperature acquisition unit acquires the first output temperature of the preheating medium. When the absolute value of the difference between the first output temperature and the second temperature is less than or equal to the first threshold, the first heat dissipation unit output terminal is controlled to open.

[0073] The cooling principle of the second heat dissipation unit is the same as that of the first heat dissipation unit, and will not be described again.

[0074] Please refer to Figure 2 As shown, this control system is suitable for various vehicle usage scenarios:

[0075] In the first scenario, under low-temperature conditions, all power modules need to operate to provide power for vehicle operation; the first heat dissipation unit is in the second state, and the second heat dissipation unit is in the third state.

[0076] In this scenario, the workflow of the control system is as follows: The preheating medium at the first temperature flows out from the medium output end 11 of the heat exchange tube 1. The medium output end 11 is connected to the input end of the engine module 5. After providing preheating energy to the engine module 5, the preheating medium flows out from the output end of the engine module 5. The output end of the engine module 5 is connected to the input end of the first heat dissipation unit. After entering the first heat dissipation unit, the temperature of the preheating medium drops to the second temperature and then flows out from its output end. The output end of the first heat dissipation unit is connected to the input end of the motor module 7. After providing preheating energy to the motor module 7, the preheating medium flows out from the output end of the motor module 7. The output end of the motor module 7 is connected to the input end of the second heat dissipation unit. After flowing through the second heat dissipation unit, the temperature of the preheating medium drops to the third temperature and then flows out from its output end. The output end of the second heat dissipation unit is connected to the input end of the battery module 9. After providing preheating energy to the battery module 9, the preheating medium flows out from the output end of the battery module 9. The output end of the battery module 9 is connected to the input end of the heat exchange tube 1, forming a fluid circulation of the entire system.

[0077] In the second scenario, under low-temperature conditions, the engine module 5 does not operate, and the motor module 7 and battery module 9 operate to provide power for vehicle operation; the first heat dissipation unit is in the first state, and the second heat dissipation unit is in the third state.

[0078] In this scenario, the workflow of the control system is as follows: the preheating medium at the first temperature flows out from the medium output end 11 of the heat exchange tube 1. The medium output end 11 is connected to the input end of the first heat dissipation unit. After the preheating medium at the first temperature enters the first heat dissipation unit, its temperature drops to the second temperature and then flows out from its output end. The subsequent workflow is the same as in the first scenario.

[0079] In the third scenario, under low-temperature conditions, the motor module 7 does not work, and the engine module 5 and battery module 9 work to provide power for vehicle operation; the first heat dissipation unit is in the second state, and the second heat dissipation unit is in the fourth state.

[0080] In this scenario, the workflow of the control system is as follows: before the preheating medium is output from the output end of the first heat dissipation unit, it is the same as the workflow of the system in the first scenario. After the preheating medium at the second temperature is output from the output end of the first heat dissipation unit, the output end of the first heat dissipation unit is connected to the input end of the second heat dissipation unit. After the preheating medium at the second temperature flows into the second heat dissipation unit, it is cooled down again. After being cooled to the third temperature, it is output from the output end of the second heat dissipation unit. The output end of the second heat dissipation unit is connected to the input end of the battery module 9. After the preheating medium at the third temperature preheats the battery module 9, it flows back from the output end of the battery module 9 to the input end of the heat exchange tube 1, forming a fluid circulation of the entire system.

[0081] Since the battery module 9 needs to work for the vehicle to be powered on, the above scenarios all consider the scenario where the battery module 9 needs to work. When the battery module 9 does not need to work, the input end of the motor module 7 can be connected to the input end of the heat exchange tube 1.

[0082] In a preferred embodiment, the heat exchange tube 1 is located on the side of the catalytic core 2 of the three-way catalytic converter 3 away from the intake pipe 31.

[0083] Please refer to Figure 1 As shown, since the three-way catalytic converter 3 has its own required temperature for treating exhaust gas, the heat exchange tube 1 is placed inside the three-way catalytic converter 3 and on the side of the catalytic core 2 away from the intake pipe 31. This ensures that the temperature of the exhaust gas before entering the catalytic core 2 is sufficient for the three-way catalytic converter 3 to enter the catalytic state, ensuring that the exhaust gas discharged from the exhaust pipe 32 meets the emission standards. Under the premise of not affecting the normal operation of the three-way catalytic converter 3, the heat of the exhaust gas is recovered, effectively utilizing the high-quality heat source inside the vehicle.

[0084] Specifically, the heat exchange tube 1 can also extend to the outside of the three-way catalytic converter 3. The internal heat exchange tube 1 is used to absorb heat, and the external heat exchange tube 1 is used to control the temperature to ensure that the preheated medium output by the medium output terminal 11 is at the first temperature.

[0085] Specifically, the heat exchange tube 1 is located on the side of the catalytic core 2 of the three-way catalytic converter 3 away from the intake pipe 31. It can not only recover heat to preheat each power module, but also the heat emitted by the heat exchange tube 1 can radiate heat to the catalytic core 2, thereby improving the catalytic effect of the three-way catalytic converter 3 and ensuring that the exhaust gas discharged from the exhaust pipe 32 meets the emission standards.

[0086] Specifically, the outer wall area of ​​the heat exchange tube 1 is directly proportional to the initial temperature of the coolant at the inlet end of the heat exchange tube 1. This proportionality coefficient can be obtained through past experience. Once obtained, a model can be constructed so that the initial coolant temperature can be input into the model, and the outer wall area can be output. The coiled arrangement of the heat exchange tube 1 can increase its outer wall area, thus increasing the heat absorbed by the coolant inside the tube. However, the outer wall area should not be too large. This can be achieved by designing the coiled structure of the heat exchange tube 1. Please refer to [reference needed]. Figure 4 and Figure 5 As shown, several optional coiled structures of the heat exchange tube 1 are provided; the heat recovery is controlled by controlling the outer wall area of ​​the heat exchange tube 1, that is, the temperature of the preheating medium is controlled, ensuring that the preheating medium output from the medium output end 11 is at the first temperature.

[0087] In a preferred embodiment, the output end of the battery module 9 is connected to the medium input end of the heat exchange tube 1 through a first pipe. A spray assembly 10 is provided on the first pipe. When the temperature of the three-way catalytic converter 3 is greater than or equal to a first preset temperature, the spray assembly 10 sprays the preheating medium onto the three-way catalytic converter 3.

[0088] Specifically, the spray assembly 10 is a temperature-sensing shower head. When the temperature of the three-way catalytic converter 3 is so high that there is a risk of fire, the preheated medium, which is provided to each module and then cooled by two cooling modules, can be sprayed onto the three-way catalytic converter 3 to cool it down and extinguish the fire.

[0089] In a preferred embodiment, the engine module 5 includes a first exhaust assembly for exhausting preheating medium within the engine module 5.

[0090] In a preferred embodiment, the second preheating unit includes a second exhaust assembly for venting the preheating medium within the motor module 7.

[0091] Specifically, the first exhaust assembly is a high-temperature water reservoir, and the second exhaust assembly is a low-temperature water reservoir. When the preheating medium is at a high temperature and vaporizes, the first exhaust assembly and the second exhaust assembly are used to exhaust excess gas from the preheating pipes of each power module to prevent pipe rupture caused by excessive gas.

[0092] Example 2

[0093] This embodiment provides a vehicle low-temperature preheating control system. The similarities between this control system and Embodiment 1 will not be repeated here. The difference is that, in non-preheating conditions, this system can also dissipate heat from the engine module 5 and the motor module 7. Since the battery module 9 has its own heat dissipation components, it only dissipates heat from the other two modules.

[0094] The vehicle cooling tank has at least two pipes. The other end of the first branch is connected to the heat exchange pipe 1; the other end of the second branch is connected to the pipes inside the vehicle's power module. In non-preheating conditions, the first branch is disconnected and the second branch is not connected, and the coolant in the cooling tank circulates directly within its respective power module. The first heat dissipation unit also has a fifth state, in which the output end of the first heat dissipation unit is connected to the input end of the engine module 5, and the coolant circulates throughout the entire engine module 5. At this time, the first heat dissipation unit can dissipate heat from the components inside the engine module 5. The second heat dissipation unit also has a sixth state, in which the output end of the second heat dissipation unit is connected to the input end of the motor module 7, and the coolant circulates throughout the entire motor module 7. At this time, the second heat dissipation unit can dissipate heat from the components inside the motor module 7.

[0095] In summary, this control system can meet diverse usage requirements under both preheating and non-preheating conditions based on the same piping design, maximizing the system's functionality.

[0096] Example 3

[0097] Please refer to Figure 3 This embodiment provides a vehicle low-temperature preheating control method, which adopts the vehicle low-temperature preheating control system as described in Embodiment 1. The control method includes the following steps:

[0098] S101. Receive the request preheating signal from the engine module 5 and connect the medium output end 11 of the heat exchange tube 1 with the input end of the engine module 5.

[0099] S102. Receive the request preheating signal from the motor module 7, switch the first cooling module 6 to the on state, and connect the output terminal of the first cooling module 6 to the input terminal of the motor module 7. The output terminal of the first cooling module 6 outputs the preheating medium at the second temperature.

[0100] S103. Receive the request preheating signal from the battery module 9, switch the second cooling module 8 to the on state, and connect the output terminal of the second cooling module 8 to the input terminal of the battery module 9. The output terminal of the second cooling module 8 outputs the preheating medium at the third temperature.

[0101] This control method is applicable to the first scenario. In low-temperature environments, in most cases, preheating of each power module is required to ensure normal vehicle operation. However, there are a few exceptions. For example, if a preheating request signal is received from the motor module 7 and battery module 9 instead of the engine module 5, the workflow is switched to the second scenario. If a preheating request signal is received from the engine module 5 and battery module 9 instead of the motor module 7, the workflow is switched to the third scenario.

[0102] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A control system for low temperature warm-up of a vehicle, characterized in that include: A heat exchange tube (1) has a medium output end (11); the medium output end (11) outputs a preheating medium at a first temperature, and an engine module (5), a motor module (7) and a battery module (9) are sequentially connected to the medium output end (11) of the heat exchange tube (1); the preheating medium at the first temperature is used to preheat the engine module (5) to its corresponding working temperature. A first cooling module (6) is disposed between the engine module (5) and the motor module (7). The first cooling module (6) is used to cool the preheating medium to a second temperature. The preheating medium at the second temperature is used to preheat the motor module (7) to its corresponding working temperature. The first cooling module (6) includes: a first heat dissipation unit, the output end of which outputs the preheating medium at the second temperature, and the output end of which is connected to the input end of the motor module (7); the first heat dissipation unit has a first state and a second state. In the first state, the input end of the first heat dissipation unit is connected to the medium output end (11), and in the second state, the input end of the first heat dissipation unit is connected to the output end of the engine module (5); and a first control unit, which is used to control the first heat dissipation unit to switch between the first state and the second state. The second cooling module (8) is located between the motor module (7) and the battery module (9). The second cooling module (8) is used to cool the preheating medium to a third temperature. The preheating medium at the third temperature is used to preheat the battery module (9) to its corresponding operating temperature. The corresponding operating temperatures of the engine module (5), the motor module (7) and the battery module (9) decrease sequentially.

2. The control system for vehicle cold cranking of claim 1, wherein, The second cooling module (8) includes: The second heat dissipation unit outputs the preheating medium at the third temperature at its output end, and the output end of the second heat dissipation unit is connected to the input end of the battery module (9). The second heat dissipation unit has a third state and a fourth state. In the third state, the input end of the second heat dissipation unit is connected to the output end of the motor module (7). In the fourth state, the input end of the second heat dissipation unit is connected to the output end of the first heat dissipation unit. The second control unit is used to control the second heat dissipation unit to switch between the third state and the fourth state.

3. The control system for vehicle cold cranking of claim 1, wherein, The heat exchange tube (1) is located on the side of the catalytic core (2) of the three-way catalytic converter (3) of the vehicle away from the intake pipe (31).

4. The vehicle low-temperature preheating control system according to claim 1, characterized in that: The output end of the battery module (9) is connected to the medium input end of the heat exchange tube (1) through the first pipe. The first pipe is equipped with a spray assembly (10). When the temperature of the three-way catalytic converter (3) is greater than or equal to the first preset temperature, the spray assembly (10) sprays the preheating medium onto the three-way catalytic converter (3).

5. The vehicle low-temperature preheating control system according to claim 1, characterized in that, The first cooling module (6) also includes: A first temperature acquisition unit is configured to acquire the first initial temperature of the preheating medium input at the input terminal of the first heat dissipation unit. The first control unit is further configured to obtain a corresponding first cooling duration based on the first initial temperature, and control the first heat dissipation unit to cool the preheating medium for the first cooling duration.

6. The vehicle low-temperature preheating control system according to claim 2, characterized in that, The second cooling module (8) also includes: The second temperature acquisition unit is configured to acquire the second initial temperature of the preheating medium input at the input terminal of the second heat dissipation unit; The second control unit is further configured to obtain a corresponding second cooling duration based on the second initial temperature, and control the second heat dissipation unit to cool the preheating medium for the second cooling duration.

7. The vehicle low-temperature preheating control system according to claim 1, characterized in that, The engine module (5) includes a first exhaust assembly for exhausting preheating medium within the engine module (5).

8. The vehicle low-temperature preheating control system according to claim 1, characterized in that, The motor module (7) includes a second exhaust assembly for venting the preheating medium within the motor module (7).

9. A method for controlling vehicle low-temperature preheating, characterized in that, Applicable to claim 1 The vehicle low-temperature preheating control system according to any one of the following methods includes the following steps: Receive the request for preheating signal from the engine module (5) and connect the medium output end (11) of the heat exchange tube (1) with the input end of the engine module (5); Receive the request preheating signal from the motor module (7), switch the first cooling module (6) to the on state, and connect the output terminal of the first cooling module (6) to the input terminal of the motor module (7). The output terminal of the first cooling module (6) outputs the preheating medium at the second temperature. Upon receiving a preheating request signal from the battery module (9), the second cooling module (8) is switched to the on state, and the output terminal of the second cooling module (8) is connected to the input terminal of the battery module (9). The output terminal of the second cooling module (8) outputs the preheating medium at a third temperature.

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