Cooling liquid filling method, vehicle and storage medium

Abstract

The invention discloses a cooling liquid filling method and a vehicle, and relates to the technical field of vehicle maintenance. The method comprises the steps that in a cooling liquid filling mode, a first adjusting instruction is sent to a warm air water valve, an electronic thermostat and a first electric water pump; acquiring a first running state of the engine; responding to the condition that the first operation state indicates that the engine is in a starting state, and obtaining fault status bits of a warm air water valve and an electronic thermostat; and in response to the situation that both the warm air water valve and the electronic thermostat are in the normal operation state, the vehicle is filled with cooling liquid to a preset target line, and the vehicle is prompted that the cooling liquid filling process is completed. The technical problem of insufficient filling of cooling liquid in the prior art is solved.

Description

Technical Field

[0001] This invention relates to the field of vehicle maintenance technology, and more specifically, to a method for adding coolant and a vehicle. Background Technology

[0002] With the development of automotive technology, mainstream gasoline vehicles generally adopt water-cooled intercooling systems to improve intake air cooling efficiency. However, to control costs, they often use an integrated cooling architecture with a single expansion tank, a small-power water pump, thin-diameter pipes, and complex flow channels. While existing designs meet the needs of daily operation, they reveal serious problems with coolant filling in after-sales maintenance scenarios. Due to weak water pump driving force, high pipe resistance, and tortuous flow channels, it is difficult for the coolant to completely purge air from the system, resulting in air blockages in some pipes and insufficient actual coolant filling, which seriously threatens driving safety.

[0003] No effective solution has yet been proposed to address the above issues. Summary of the Invention

[0004] This invention provides a method for adding coolant and a vehicle to at least solve the technical problem of insufficient coolant filling in related technologies.

[0005] According to one embodiment of the present invention, a coolant filling method is provided, comprising: in a coolant filling mode, sending a first adjustment command to a heater core valve, an electronic thermostat, and a first electric water pump, wherein the coolant filling mode is used to replenish coolant to a vehicle, and the first adjustment command is used to adjust the opening degree of the heater core valve and the electronic thermostat, as well as the duty cycle of the first electric water pump; acquiring a first operating state of the engine, wherein the first operating state is used to determine whether the engine is in a started state; in response to the first operating state indicating that the engine is in a started state, acquiring fault status bits of the heater core valve and the electronic thermostat, wherein the fault status bits are used to indicate whether the heater core valve and the electronic thermostat are in a normal operating state; in response to both the heater core valve and the electronic thermostat being in a normal operating state, filling the vehicle with coolant to a preset target line, and indicating that the coolant filling process of the vehicle is complete.

[0006] Optionally, the coolant filling method also includes: controlling the engine speed to remain within a preset speed range in response to the heater valve and electronic thermostat both being in normal operating condition.

[0007] Optionally, the coolant filling method further includes: when adding coolant to the vehicle, sending a second adjustment command to the second electric water pump, wherein the second adjustment command is used to adjust the duty cycle of the second electric water pump.

[0008] Optionally, the coolant filling method further includes: obtaining a second operating state of the first electric water pump and the second electric water pump; determining whether the first electric water pump and the second electric water pump are operating according to the target duty cycle based on the second operating state, and obtaining a first determination result; and / or determining whether the first electric water pump and the second electric water pump have a fault based on the second operating state, and obtaining a second determination result.

[0009] Optionally, the coolant filling method further includes: in response to a first determination result indicating that both the first electric water pump and the second electric water pump are operating according to the target duty cycle, and a second determination result indicating that both the first electric water pump and the second electric water pump are fault-free, acquiring a first current value of the first electric water pump and a second current value of the second electric water pump during a preset time period; in response to the first current value being continuously within the first current range during the preset time period, and the second current value being continuously within the second current range during the preset time period, determining that the coolant filling process of the vehicle is completed.

[0010] Optionally, the coolant filling method further includes: in response to the completion of the vehicle's coolant filling process, releasing control of the heater valve, electronic thermostat, first electric water pump, and second electric water pump.

[0011] Optionally, the coolant filling method further includes: adjusting the opening of the heater valve to a first opening degree by controlling the air conditioning controller with a diagnostic tool; adjusting the opening of the electronic thermostat to a second opening degree by controlling the engine management system with a diagnostic tool; and adjusting the duty cycle of the first electric water pump to a target duty cycle by controlling the engine management system with a diagnostic tool.

[0012] Optionally, the fault status bits of the heater core valve and the electronic thermostat are obtained separately, including: obtaining the first fault status bit of the heater core valve by controlling the air conditioning controller through the diagnostic tool; in response to the first fault status bit indicating that the heater core valve has moved to the first target position according to the preset command and there is no fault, obtaining the second fault status bit of the electronic thermostat by controlling the engine management system through the diagnostic tool; in response to the first fault status bit indicating that the heater core valve is faulty, prompting to restart the coolant filling mode and determine whether the heater core valve is damaged.

[0013] Optionally, the coolant filling method further includes: in response to the second fault status bit indicating that the electronic thermostat has moved to the second target position according to the preset command and there is no fault, maintaining the coolant filling mode; in response to the second fault status bit indicating that the electronic thermostat is faulty, prompting to restart the coolant filling mode and determining whether the electronic thermostat is damaged.

[0014] According to one embodiment of the present invention, a coolant filling device is also provided, comprising: a sending module, configured to send a first adjustment command to a heater core valve, an electronic thermostat, and a first electric water pump respectively in a coolant filling mode, wherein the coolant filling mode is used to replenish coolant to a vehicle, and the first adjustment command is used to adjust the opening degree of the heater core valve and the electronic thermostat, as well as the duty cycle of the first electric water pump; a first acquisition module, configured to acquire a first operating state of the engine, wherein the first operating state is used to determine whether the engine is in a started state; a second acquisition module, configured to acquire fault status bits of the heater core valve and the electronic thermostat respectively in response to the first operating state indicating that the engine is in a started state, wherein the fault status bits are used to indicate whether the heater core valve and the electronic thermostat are in a normal operating state; and a filling module, configured to fill the vehicle with coolant to a preset target line in response to the heater core valve and the electronic thermostat being in a normal operating state, and to indicate that the coolant filling process of the vehicle is complete.

[0015] According to one embodiment of the present invention, a vehicle is also provided, comprising: a memory storing an executable program; and a processor for running the executable program, wherein the executable program, when run on the processor, performs the coolant filling method described in any of the preceding claims.

[0016] According to one embodiment of the present invention, a computer-readable storage medium is also provided, wherein the storage medium stores a computer program, wherein the computer program is configured to execute the coolant filling method described above when run on a computer or processor.

[0017] According to one embodiment of the present invention, an electronic device is also provided, including a memory and a processor, wherein the memory stores a computer program and the processor is configured to run the computer program to perform the coolant filling method described in any of the preceding claims.

[0018] According to one embodiment of the present invention, a computer program product is also provided, including a computer program that, when executed by a processor, implements the coolant filling method described in any of the above claims.

[0019] In this embodiment of the invention, firstly, in coolant filling mode, a first adjustment command is sent to the heater core valve, electronic thermostat, and first electric water pump, respectively. The coolant filling mode is used to replenish coolant in the vehicle. The first adjustment command is used to adjust the opening degree of the heater core valve and electronic thermostat, as well as the duty cycle of the first electric water pump. Next, the first operating state of the engine is acquired, which determines whether the engine is in a running state. When the first operating state indicates that the engine is in a running state, fault status bits of the heater core valve and electronic thermostat are acquired, indicating whether they are in a normal operating state. When both the heater core valve and electronic thermostat are in a normal operating state, coolant is added to the vehicle to a preset target level, and the vehicle's coolant filling process is indicated as complete. This achieves the purpose of automatically guiding maintenance personnel to complete the coolant filling operation, thereby achieving the technical effect of sufficient coolant filling and solving the technical problem of insufficient coolant filling in related technologies. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0021] Figure 1 This is a flowchart of a coolant filling method according to one embodiment of the present invention;

[0022] Figure 2 This is a communication block diagram according to one embodiment of the present invention;

[0023] Figure 3 This is a cooling principle diagram according to one embodiment of the present invention;

[0024] Figure 4 This is a structural block diagram of a coolant filling device according to one embodiment of the present invention;

[0025] Figure 5 This is a structural block diagram of an electronic device according to one embodiment of the present invention. Detailed Implementation

[0026] For ease of understanding, some concepts related to embodiments of the present invention are illustrated below for reference.

[0027] After-sales coolant refill mode: This refers to a standardized process where a diagnostic tool sends preset control commands to the vehicle's Engine Management System (EMS) and Automatic Temperature Control (ATC) via the Controller Area Network (CAN) or Local Interconnect Network (LIN) bus. This forces the heater core valve, electronic thermostat, and electric water pump to specific operating states, creating a low-resistance, high-flow coolant circulation path. This is specifically designed for manual coolant refilling in after-sales vehicle maintenance scenarios. This mode differs from production line vacuum refilling, does not rely on external equipment, and is entirely achieved through the coordinated operation of the vehicle's Electronic Control Unit (ECU).

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. In the description of these embodiments, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0030] According to one embodiment of the present invention, an embodiment of a coolant filling method is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0031] This method embodiment can be executed in an electronic device, similar control device, or system that includes a memory and a processor. Taking an electronic device as an example, the electronic device may include one or more processors and a memory for storing data. Optionally, the electronic device may also include a communication device for communication functions and a display device. Those skilled in the art will understand that the above structural description is merely illustrative and does not limit the structure of the electronic device. For example, the electronic device may include more or fewer components than described above, or have a different configuration than described above.

[0032] A processor may include one or more processing units. For example, a processor may include a central processing unit (CPU), a graphics processing unit (GPU), a digital signal processing (DSP) chip, a microcontroller unit (MCU), a field-programmable gate array (FPGA), a neural network processing unit (NPU), a tensor processing unit (TPU), or an artificial intelligence (AI) processor. Different processing units may be independent components or integrated into one or more processors. In some instances, electronic devices may also include one or more processors.

[0033] The memory can be used to store computer programs, such as the computer program corresponding to the coolant filling method in this embodiment of the invention. The processor implements the coolant filling method by running the computer program stored in the memory. The memory may include high-speed random access memory and non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory may further include memory remotely located relative to the processor, and these remote memories can be connected to electronic devices via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0034] Communication devices are used to receive or send data via a network. Specific examples of such networks may include wireless networks provided by the mobile terminal's communication provider. In one example, the communication device includes a network interface controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the communication device may be a radio frequency (RF) module used for wireless communication with the Internet.

[0035] Display devices can be, for example, touchscreen liquid crystal displays (LCDs) and touch displays (also referred to as "touchscreens" or "touch displays"). The LCD allows users to interact with the user interface of the mobile terminal. In some embodiments, the mobile terminal has a graphical user interface (GUI), which allows users to interact with the GUI through finger contact and / or gestures on a touch-sensitive surface. Optional human-computer interaction functions include: creating web pages, drawing, word processing, creating electronic documents, playing games, video conferencing, instant messaging, sending and receiving emails, call interfaces, playing digital video, playing digital music, and / or web browsing, etc. Executable instructions for performing the above human-computer interaction functions are configured / stored in one or more processor-executable computer program products or readable storage media.

[0036] This embodiment provides a method for adding coolant to an electronic device. Figure 1 This is a flowchart of a coolant filling method according to one embodiment of the present invention, such as... Figure 1 As shown, the process includes the following steps:

[0037] Step S10: In the coolant filling mode, a first adjustment command is sent to the heater valve, the electronic thermostat and the first electric water pump respectively. The coolant filling mode is used to replenish coolant in the vehicle, and the first adjustment command is used to adjust the opening degree of the heater valve and the electronic thermostat as well as the duty cycle of the first electric water pump.

[0038] In this embodiment of the invention, the coolant filling mode is a vehicle cooling system control state specifically designed for after-sales maintenance scenarios, triggered by a touch button.

[0039] The heater core valve is an electrically adjustable fluid on / off valve installed in the engine's high-temperature circuit to control whether high-temperature coolant flows through the front / rear heater core.

[0040] The electronic thermostat is an electronically controlled temperature-regulating device based on the principle of thermal expansion of wax. It is installed on the main circulation path of the engine coolant, and is normally closed (blocking the main circulation), and is opened when energized (conducting the high-temperature radiator circuit).

[0041] The first electric water pump is a low-power electric water pump controlled by EMS via LIN / CAN bus, used to drive the circulation of coolant in the intercooler circuit.

[0042] The first adjustment command refers to the control signal sent by the diagnostic instrument to the heater valve, electronic thermostat, and first electric water pump after entering the coolant filling mode, which is used to adjust the working status of the heater valve, electronic thermostat, and first electric water pump.

[0043] In coolant filling mode, sending the first adjustment command to the heater valve, electronic thermostat, and first electric water pump can be understood as sending the first adjustment command to the vehicle's air conditioning controller and engine management system in coolant filling mode, thereby adjusting the opening degree of the heater valve and electronic thermostat and the duty cycle of the first electric water pump.

[0044] It can be seen that by sending a first adjustment command to the heater valve, electronic thermostat and first electric water pump in the coolant filling mode, the opening degree of the heater valve and electronic thermostat and the duty cycle of the first electric water pump are adjusted, thereby opening the circulation path of the coolant.

[0045] Step S12: Obtain the first operating state of the engine, wherein the first operating state is used to determine whether the engine is in the start state;

[0046] In this embodiment of the invention, the first operating state refers to the real-time signal obtained by sending a status read command to the engine management system through a diagnostic tool, indicating whether the engine is in actual operating condition. Specifically, it is manifested as key operating parameters such as engine speed, ignition status, or crankshaft position sensor signal fed back by the EMS. The first operating state is used to confirm that the engine has started and has the ability to output power, thereby ensuring that the mechanical water pump starts working and the coolant circulation can be established normally, providing the necessary fluid flow driving force for the subsequent filling process.

[0047] For example, if the first operating state is "engine not started", the diagnostic tool will terminate the refueling process and prompt the user to start the vehicle first to avoid refueling failure or system idling damage due to lack of circulating power.

[0048] Obtaining the engine's initial operating status can be understood as querying the engine management system via the vehicle communication bus to confirm whether the engine has actually started and entered the operating state, in order to confirm that the cooling system has the normal circulation capability driven by the mechanical water pump.

[0049] It can be seen that by acquiring the engine's first operating state, such as the actual engine speed, ignition signal, or crankshaft operating state, dynamic parameters are obtained to ensure that the coolant circulation is real. This avoids blindly adding coolant under static conditions when the engine is not running, preventing gas from being unable to be discharged due to lack of coolant circulation, ineffective adding, or damage to the water pump due to dry running, thus ensuring the safety and effectiveness of the adding process.

[0050] Step S14: In response to the first operating state indicating that the engine is in the start state, the fault status bits of the heater valve and the electronic thermostat are obtained respectively, wherein the fault status bits are used to indicate whether the heater valve and the electronic thermostat are in the normal operating state.

[0051] In this embodiment of the invention, the fault status bit refers to the real-time operating status information fed back by the respective controllers of the heater valve and electronic thermostat via the CAN / LIN bus after the first adjustment command is executed. This includes, but is not limited to, diagnostic fault codes such as whether the actual opening degree reaches the target value, whether there is stall, signal loss, motor overcurrent, or position deviation.

[0052] In response to the first operating state indicating that the engine is in the start state, the acquisition of the fault status bits of the heater valve and electronic thermostat can be understood as follows: after confirming that the engine is running normally, the diagnostic tool actively requests feedback from the air conditioning controller and engine management system on the actual operating status of the heater valve and electronic thermostat, and checks whether the heater valve and electronic thermostat are fully opened as instructed, whether there is a stall, abnormal signal, or positional deviation, etc.

[0053] It can be seen that after confirming that the engine has started, by reading the fault status of the heater valve and the electronic thermostat, it is possible to effectively prevent the heater valve or the electronic thermostat from being forcibly filled in when they are in an abnormal state, which could cause safety hazards.

[0054] Step S16: In response to the fact that the heater valve and electronic thermostat are both in normal operating condition, add coolant to the vehicle to the preset target line and indicate that the coolant filling process is complete.

[0055] In this embodiment of the invention, the preset target line refers to the MAX level line marked on the outer wall of the vehicle's expansion tank, which is used to indicate the maximum volume that the coolant can safely hold under normal system operating temperature and pressure.

[0056] In response to the fact that the heater core and electronic thermostat are both in normal operating condition, the system adds coolant to the vehicle to the preset target level and indicates that the coolant filling process is complete. This can be understood as follows: when it is confirmed that the heater core and electronic thermostat are in normal operating condition, the system continues to add coolant according to the diagnostic tool's prompts until the coolant level reaches the MAX line of the expansion tank, and then actively indicates that the coolant filling process is complete.

[0057] It can be seen that by adding coolant to the MAX line of the expansion tank and indicating that the process is complete, insufficient or excessive filling due to human inexperience can be avoided, thereby improving the reliability and safety of after-sales maintenance, reducing the return rate, and optimizing user experience and maintenance efficiency.

[0058] Through the above steps, firstly, in coolant filling mode, first adjustment commands are sent to the heater core valve, electronic thermostat, and first electric water pump, respectively. The coolant filling mode is used to replenish coolant in the vehicle, and the first adjustment commands are used to adjust the opening degree of the heater core valve and electronic thermostat, as well as the duty cycle of the first electric water pump. Next, the first operating state of the engine is acquired, which determines whether the engine is running. When the first operating state indicates that the engine is running, fault status bits of the heater core valve and electronic thermostat are acquired, indicating whether they are operating normally. When both the heater core valve and electronic thermostat are operating normally, coolant is added to the vehicle to a preset target level, and the vehicle's coolant filling process is indicated as complete. This achieves the goal of automatically guiding maintenance personnel to complete the coolant filling operation, thus realizing the technical effect of sufficient coolant filling and solving the technical problem of insufficient coolant filling in related technologies.

[0059] Optionally, the coolant filling method may also include the following steps:

[0060] In response to the fact that both the heater valve and the electronic thermostat are in normal operating condition, the engine speed is controlled to remain within the preset speed range.

[0061] In this embodiment of the invention, the preset speed range refers to the engine speed range that promotes the effective discharge of gas in the cooling system and establishes a stable fluid circulation. For example, the engine speed is maintained in the range of 2000 to 3000 rpm, which ensures that the mechanical and electric water pumps provide sufficient flow to fully circulate the coolant in the intercooler circuit and the engine circuit, effectively removing gas accumulated at the end of the pipes, while avoiding excessive speed that could lead to a sudden increase in system pressure or temperature runaway.

[0062] In response to the fact that the heater valve and electronic thermostat are both in normal operating condition, keeping the engine speed within the preset speed range can be understood as maintaining the engine speed in the range of 2000 to 3000 rpm after confirming that the heater valve and electronic thermostat are both open and the cooling system passage is unobstructed.

[0063] It can be seen that when the heater valve and electronic thermostat are both in normal operating condition, the engine speed is controlled to remain within the preset speed range, thereby effectively driving the coolant to form a stable circulation in the cooling circuit, accelerating the discharge of residual gas in the pipes, and ensuring that the coolant completely fills the water-cooled intercooler and other areas prone to gas accumulation such as slender pipes.

[0064] Optionally, the coolant filling method may also include the following steps:

[0065] When adding coolant to the vehicle, a second adjustment command is sent to the second electric water pump, wherein the second adjustment command is used to adjust the duty cycle of the second electric water pump.

[0066] In this embodiment of the invention, the second electric water pump is an electric water pump that provides auxiliary circulation power for the engine's high-temperature circuit, used to enhance coolant flow when the mechanical water pump stops (e.g., when the engine is turned off) or the flow rate is insufficient.

[0067] The second adjustment command is a control command sent to the second electric water pump to adjust the duty cycle of the second electric water pump.

[0068] Sending a second adjustment command to the second electric water pump when adding coolant to the vehicle can be understood as the EMS sending a second adjustment command to the second electric water pump and adjusting the duty cycle of the second electric water pump so that the second electric water pump operates at near maximum output, increasing the coolant circulation speed and pressure in the high-temperature circuit, accelerating the discharge of residual air in the pipeline, and ensuring that the coolant fully fills high-resistance areas such as the intercooler and turbocharger pipeline.

[0069] It can be seen that by adjusting the duty cycle of the second electric water pump, the cooling fluid circulation power of the high-temperature circuit can be improved, the residual air can be discharged more quickly, and the coolant can be fully filled into areas prone to air accumulation, such as the intercooler and turbocharger pipeline. This improves the integrity and consistency of the filling process, reduces the risk of overheating caused by air resistance, simplifies the maintenance process, shortens working hours, and improves after-sales efficiency and safety.

[0070] Optionally, the coolant filling method may also include the following steps:

[0071] Obtain the second operating status of the first electric water pump and the second electric water pump;

[0072] Based on the second operating state, determine whether the first and second electric water pumps are operating according to the target duty cycle, and obtain a first determination result; and / or,

[0073] Based on the second operating state, it is determined whether the first electric water pump and the second electric water pump are faulty, and a second determination result is obtained.

[0074] In this embodiment of the invention, the second operating state refers to the real-time operating parameters fed back to the EMS by the first and second electric water pumps through their own sensors, including actual duty cycle, operating current, stall state, dry run state, etc., which are used to characterize the current operating status of the water pumps.

[0075] The target duty cycle refers to the duty cycle setting value of the pulse width modulation (PWM) control signal output by the EMS to the second electric water pump.

[0076] The first determination result refers to the EMS or diagnostic instrument judging whether the water pump is operating stably according to the target duty cycle based on the actual duty cycle in the second operating state. If it is within the tolerance range, it is judged as "operating normally"; otherwise, it is "not operating according to the target duty cycle".

[0077] The second determination result refers to judging whether there is a hardware or control fault in the water pump based on abnormal data such as current fluctuations, stall signals, or dry running alarms. For example, "no fault" or "first electric water pump stall fault" is used to trigger diagnostic prompts to ensure that the cooling system is in a safe and executable state before filling.

[0078] Obtaining the second operating status of the first and second electric water pumps can be understood as the diagnostic instrument sending a read command to the EMS via the CAN / LIN bus to obtain the actual operating parameters fed back by the first and second electric water pumps in real time, including dynamic data such as the current duty cycle, operating current, and whether stall or dry running has occurred, in order to evaluate the real-time operating status of the pumps.

[0079] Determining whether the first and second electric water pumps are operating according to the target duty cycle based on the second operating state can be understood as the system comparing the actual duty cycle of the first and second electric water pumps with the target duty cycle to obtain the first determination result.

[0080] The determination of whether the first and second electric water pumps are faulty based on the second operating state can be understood as the system judging whether the first and second electric water pumps have hardware damage or control failure based on abnormal signals such as abnormal current fluctuations, continuous stall or dry running alarms, and obtaining the second determination result.

[0081] It can be seen that by obtaining the actual operating status of the first and second electric water pumps, it is possible to determine whether the first and second electric water pumps are operating stably according to the target duty cycle, and simultaneously identify faults such as stall and dry running, thereby achieving dual closed-loop verification before filling. This effectively avoids the risk of incomplete filling or system idling caused by pump abnormalities or control failures, ensuring that the coolant fully fills the high-resistance flow channel and improving the reliability and safety of filling.

[0082] Optionally, the coolant filling method may also include the following steps:

[0083] In response to the first determination result indicating that both the first electric water pump and the second electric water pump are operating according to the target duty cycle, and the second determination result indicating that both the first electric water pump and the second electric water pump are fault-free, the first current value of the first electric water pump and the second current value of the second electric water pump during the preset time period are obtained.

[0084] In response to the first current value being continuously within the first current range for a preset time period and the second current value being continuously within the second current range for a preset time period, it is determined that the vehicle's coolant filling process is complete.

[0085] In this embodiment of the invention, the first current value refers to the real-time operating current continuously collected by the first electric water pump during the filling process.

[0086] The second current value refers to the real-time operating current collected by the second electric water pump within the same time period.

[0087] The preset time period refers to the stable monitoring duration set by the system, such as 5 seconds, which is used to filter out instantaneous fluctuations and ensure that the current status truly reflects the full liquid condition.

[0088] The first current range refers to the stable current range of the first electric water pump when the coolant is completely filled and there are no air bubbles, such as [a1, b1] (e.g., 0.8A~1.2A, which is not limited here).

[0089] The second current range refers to the stable current range of the second electric water pump under the same conditions, such as [a2, b2] (e.g., 0.6A~1.0A, which is not limited here).

[0090] In response to the first determination result indicating that both the first and second electric water pumps are operating according to the target duty cycle, and the second determination result indicating that both the first and second electric water pumps are fault-free, acquiring the first current value of the first electric water pump and the second current value of the second electric water pump within a preset time period can be understood as the system continuously collecting the real-time operating current of the first and second electric water pumps after confirming that the water pumps have started normally and are running stably. The sampling period covers a fixed time window (e.g., 5 seconds) to eliminate transient interference during startup.

[0091] The completion of the vehicle's coolant filling process can be understood as follows: when the current of the first electric water pump and the second electric water pump both fall stably within the preset full-fluid operating range, it indicates that there is no air residue in the cooling circuit, the liquid is fully filled, and the water pump load tends to be constant. Based on this, the system automatically determines that the filling is complete.

[0092] It can be seen that by confirming that the water pump is operating normally and without faults, and by combining the stable range of the water pump's operating current to determine whether the coolant has been fully added, the inaccuracy of traditional methods that rely on manual observation of the liquid level or simple timing is effectively avoided.

[0093] Optionally, the coolant filling method may also include the following steps:

[0094] In response to the completion of the vehicle's coolant filling process, control of the heater valve, electronic thermostat, first electric water pump, and second electric water pump is released.

[0095] In this embodiment of the invention, in response to the completion of the vehicle's coolant filling process, releasing control over the heater core valve, electronic thermostat, first electric water pump, and second electric water pump can be understood as the diagnostic tool sending instructions to the ATC and EMS to cancel the control commands on the heater core valve, electronic thermostat, first electric water pump, and second electric water pump, so that the heater core valve returns to the normal temperature control logic, the electronic thermostat reverts to the automatic opening and closing strategy based on engine temperature, and the first and second electric water pumps exit the preset duty cycle mode and switch to dynamic speed adjustment by the EMS according to the vehicle's thermal management requirements.

[0096] As can be seen, the above steps ensure that the cooling system automatically returns to normal operating conditions after the refueling is completed, avoiding increased energy consumption or abnormal wear of components caused by long-term forced operation, and achieving smooth and safe mode switching.

[0097] Optionally, the coolant filling method may also include the following steps:

[0098] The diagnostic tool controls the air conditioning controller to adjust the opening of the heating water valve to the first opening degree;

[0099] The electronic thermostat opening is adjusted to the second opening by controlling the engine management system through the diagnostic tool;

[0100] The duty cycle of the first electric water pump is adjusted to the target duty cycle by controlling the engine management system through the diagnostic tool.

[0101] In this embodiment of the invention, the diagnostic instrument acts as the main initiator and coordinator of the after-sales maintenance and refueling process, and is responsible for the unified scheduling of the EMS and ATC controllers to achieve centralized control, status verification and process guidance of the cooling system components.

[0102] The air conditioning controller receives control commands from the diagnostic tool via the CAN / LIN bus and adjusts the opening of the heater core valve to the preset first opening to open the circuit where the heater core is located, ensuring that the coolant can flow through the path fully during the filling process and remove accumulated air.

[0103] The first opening degree refers to the opening state of the heater water valve controlled by the diagnostic instrument, so as to unblock the heater circuit and ensure that the coolant can circulate fully and expel the gas accumulated in the pipeline during the filling process.

[0104] The engine management system is the core control unit of the vehicle, responsible for coordinating the operation of the engine and thermal management components. It receives instructions from the diagnostic tool via the CAN / LIN bus and controls actuators such as the electric water pump and thermostat.

[0105] The second opening degree refers to the opening state of the electronic thermostat controlled by the diagnostic tool. It is used to open the connection path between the engine's high-temperature circuit and the expansion tank, promote effective convection of coolant between the high and low temperature circuits, and accelerate exhaust and charging.

[0106] By controlling the air conditioning controller with a diagnostic tool to adjust the opening of the heater core valve to the first opening degree, it can be understood that the diagnostic tool sends a full-open command to the ATC to put the heater core valve in the maximum flow state, thereby eliminating the resistance of the heater core to the coolant circulation and assisting in the discharge of gas.

[0107] By controlling the engine management system (EMS) with a diagnostic tool to adjust the opening of the electronic thermostat to the second opening degree, it can be understood that the diagnostic tool sends a full-open command to the EMS, so that the electronic thermostat is at its maximum opening degree. This opens the connection between the engine's high-temperature circuit and the expansion tank, ensuring that the coolant can flow fully between the high and low temperature circuits and improving exhaust efficiency.

[0108] Adjusting the duty cycle of the first electric water pump to the target duty cycle by controlling the engine management system with a diagnostic tool can be understood as the diagnostic tool setting the first electric water pump to run continuously at a fixed high speed, enhancing the circulation power of the intercooler circuit, overcoming the high flow resistance of the thin pipes and complex flow channels, and driving the coolant to fill quickly and expel trapped air.

[0109] It can be seen that by coordinating the opening and high-power operation of the heater valve, electronic thermostat and first electric water pump through the diagnostic instrument, a low-resistance and high-flow coolant circulation path is constructed. This breaks through the problem of poor air venting caused by complex flow channels and insufficient power in traditional after-sales refilling, achieving efficient gas-liquid separation and rapid filling, significantly improving the success rate and consistency of filling, reducing the frequency of manual intervention, shortening maintenance time, and enhancing system safety and operational standardization.

[0110] Optionally, in step S14, the fault status bits of the heater valve and the electronic thermostat are obtained respectively, including the following execution steps:

[0111] Step S141: Obtain the first fault status position of the heating water valve by controlling the air conditioning controller through the diagnostic instrument;

[0112] Step S142: In response to the first fault status bit indicating that the heater valve has moved to the first target position according to the preset command and there is no fault, the second fault status bit of the electronic thermostat is obtained by controlling the engine management system through the diagnostic tool.

[0113] Step S143: In response to the first fault status bit indicating a fault in the heater valve, prompt to restart the coolant filling mode and determine whether the heater valve is damaged.

[0114] In this embodiment of the invention, the first fault status bit is the operating status signal of the heating water valve read by the diagnostic instrument from the ATC, which includes fault indicators such as position feedback, stall, and communication abnormality, and is not limited here.

[0115] The preset command refers to the opening control command issued by the diagnostic instrument.

[0116] The first target position is the opening position that the heating water valve should reach.

[0117] The second fault status bit is the electronic thermostat operating status signal read by the diagnostic instrument from the EMS, used to confirm whether it has opened to the target opening degree as instructed and whether there is any mechanical or electrical fault.

[0118] The process of obtaining the first fault status of the heating water valve by controlling the air conditioning controller through the diagnostic tool can be understood as the diagnostic tool actively sending a status query command to the ATC to obtain real-time operating data such as the actual opening degree of the heating water valve, whether it is blocked, and whether the communication is normal, in order to determine whether it is executing the command correctly.

[0119] The first fault status indicates that the heater valve has moved to the first target position according to the preset command and there is no fault. The second fault status of the electronic thermostat obtained by the diagnostic tool through the engine management system can be understood as confirming that the heater valve has been reliably fully opened and there is no fault. The status of the electronic thermostat is then checked to ensure that the subsequent filling path is unobstructed and to avoid the failure of the entire filling due to the failure of a single component.

[0120] The response to the first fault status bit indicating a fault in the heater core valve, prompting a restart of the coolant filling mode and a determination of whether the heater core valve is damaged, can be understood as follows: when the heater core valve is faulty, the filling process is automatically stopped, prompting maintenance personnel to reset and restart the coolant filling mode, and to determine whether the heater core valve hardware is damaged.

[0121] As can be seen, by using a diagnostic tool to verify the operating status of the heater core valve and electronic thermostat step by step, gas residue and filling failures caused by valve jamming, communication abnormalities, or mechanical damage are effectively avoided. The system only continues to check the thermostat status after confirming that the heater core valve is fully open and fault-free, ensuring a smooth filling path and preventing secondary failures caused by misoperation. If a fault is detected in the heater core valve, it automatically prompts for reset and hardware troubleshooting, thereby improving diagnostic accuracy and repair efficiency, significantly reducing the risk of system overheating caused by component malfunctions, and ensuring the safety and reliability of after-sales filling.

[0122] Optionally, the coolant filling method may also include the following steps:

[0123] The response to the second fault status position indicates that the electronic thermostat has operated to the second target position according to the preset command and there is no fault, and the coolant filling mode is maintained.

[0124] The second fault status bit indicates a fault in the electronic thermostat, prompting a restart of the coolant filling mode and a determination of whether the electronic thermostat is damaged.

[0125] In this embodiment of the invention, the second target position refers to the open state that the electronic thermostat should reach after receiving the opening command.

[0126] The response to the second fault status position indicates that the electronic thermostat has operated to the second target position according to the preset command and there is no fault. Maintaining the coolant filling mode can be understood as follows: when the thermostat reaches the target opening degree and there is no communication or mechanical fault, it indicates that the high temperature circuit has been fully connected and the system has the conditions for normal venting and filling. Therefore, the filling process continues to ensure that subsequent operations are safe and effective.

[0127] The response to the second fault status bit indicates that the electronic thermostat is faulty. The prompt to restart the coolant filling mode and check whether the electronic thermostat is damaged can be understood as follows: when the electronic thermostat is faulty, the system automatically stops filling, prompts the operator to reset and retry, and checks whether the electronic thermostat is damaged, so as to avoid situations where the coolant cannot circulate, is not fully filled, or is damaged by high temperature due to the thermostat not opening.

[0128] As can be seen from the above steps, when the thermostat is functioning normally, the system confirms that the high-temperature circuit is unobstructed, safely maintaining the filling mode and ensuring that the coolant is fully vented and filled. When a fault is detected in the electronic thermostat, the process is immediately stopped and a restart and maintenance prompt are triggered, avoiding air blockage, localized overheating, or even component damage caused by thermostat jamming or failure. This effectively improves the reliability and safety of filling, reduces the risk of misoperation, significantly shortens maintenance time, and enhances automated fault diagnosis in after-sales scenarios.

[0129] Figure 2 This is a communication block diagram according to one embodiment of the present invention, such as... Figure 2 As shown, the diagnostic instrument communicates with EMS and ATC via CAN bus. EMS communicates and controls the first electric coolant pump (ECP1) and the second electric coolant pump (ECP2) via LIN / CAN. EMS controls the electronic thermostat via hardwire, and ATC controls the heater valve (ECV1) via CAN / LIN / hardwire.

[0130] Figure 3 This is a cooling principle diagram according to one embodiment of the present invention, such as... Figure 3 As shown, the system mainly comprises two circuits: Cooling Circuit 1 and Cooling Circuit 2, with the water flow direction indicated by arrows. Cooling Circuit 1 includes an intercooler circuit, primarily for engine intake air cooling, comprising a low-temperature radiator, a first electric water pump ECP1, water-cooled intercooler 1, water-cooled intercooler 2, a water supply pipe for Cooling Circuit 1, a return pipe, and a flow restrictor valve. The main operating temperature range of Cooling Circuit 1 is 40℃-60℃. Cooling Circuit 2 includes an engine cooling circuit, primarily for engine cooling and providing heat for the heater / air conditioning system, comprising the engine, a mechanical water pump, an electronic thermostat, a high-temperature radiator, a second electric water pump ECP2, a heater core valve ECV1, a front heater core, a rear heater core, a turbocharger, a water supply pipe for Cooling Circuit 2, a return pipe, a check valve, and a flow restrictor valve. The main operating temperature range of Cooling Circuit 2 is 90℃-110℃. Cooling circuit 1 and cooling circuit 2 share an expansion tank. After flowing out of the expansion tank, the coolant splits into two paths through a T-junction, flowing to the mechanical water pump and the first electric water pump ECP1, respectively. T1, T2, and T3 are all temperature sensors. The engine vent pipe and the high-temperature radiator vent pipe merge through a T-junction and are connected to the expansion tank, while the low-temperature radiator vent pipe is directly connected to the expansion tank.

[0131] The one-way valve functions as follows: When the pressure in the low-temperature radiator return pipe is greater than that in the high-temperature radiator return pipe, the gas-liquid mixture will flow through the low-temperature radiator return pipe and then into the high-temperature radiator, leading to an increase in gas within the high-temperature radiator and affecting heat dissipation. The one-way valve effectively prevents this problem. High-temperature coolant from the engine circuit flows into the expansion tank through the engine return pipe and the high-temperature radiator return pipe. The coolant temperature in the expansion tank rises. To prevent the high-temperature coolant in the expansion tank from affecting the low-temperature circuit water temperature, a flow-limiting valve is added to the low-temperature radiator return pipe to restrict the flow rate in the low-temperature radiator return pipe and the water supply pipe of cooling circuit 1, ensuring that the low-temperature circuit water temperature meets the set requirements. The first electric water pump, ECP1, is controlled by LIN / CAN and provides power to cooling circuit 1, ensuring engine intake air cooling. The mechanical water pump is driven by the engine pulley and provides power to cooling circuit 2, ensuring engine cooling. The second electric water pump, ECP2, is LIN / CAN controlled and provides auxiliary power to cooling circuit 2, ensuring flow to the front and rear heater cores. When the engine is off and the mechanical water pump is not running, it also provides flow to the turbocharger to ensure its cooling. The heater core valve, ECV1, is LIN / CAN / hardwire controlled and controls the coolant flow. In this cooling system, it controls whether coolant flows through the front and rear heater cores. The electronic thermostat is hardwired and controls the coolant flow. At room temperature, the electronic thermostat is in the blocked state. When energized, the wax pack inside the electronic thermostat expands due to heat, opening the valve and allowing coolant to flow. The diagnostic tool has a timing function with a countdown progress bar for real-time monitoring.

[0132] Exemplary, the following is a specific embodiment of the present invention to help those skilled in the art understand the technical solution. The diagnostic instrument sends a 2F control command to the ATC to control the ECV1 valve opening to 100%. Upon successful transmission, the diagnostic instrument receives 6F feedback, confirming successful transmission. After receiving the 2F command, the ATC controls the ECV1 water valve opening to 100%, and the ECV1 water valve provides real-time feedback to the ATC regarding its current status and fault conditions, including current position and stall status. The diagnostic instrument sends a 2F control command to the EMS to control the ECP1 water pump duty cycle to 85%. Upon successful transmission, the diagnostic instrument receives 6F feedback, confirming successful transmission. After receiving the 2F command, the EMS controls the ECP1 water pump duty cycle to 85%, and the ECP1 water pump provides real-time feedback to the EMS regarding its current status and fault conditions, including current, current duty cycle, stall status, and dry running status. The diagnostic instrument sends a 2F control command to the EMS to fully open the electronic thermostat. Upon successful transmission, the diagnostic instrument receives 6F feedback, confirming successful transmission. After receiving the 2F command, the EMS controls the electronic thermostat to fully open. The electronic thermostat provides real-time feedback to the EMS on its current status and fault conditions, including the opening degree. The diagnostic tool sends the 22 command to the EMS to read the engine status and confirm whether the engine has started. After sending the 22 command, the EMS will respond with a 62 response. If the engine has started, proceed to the next step; if the engine has not started, the after-sales service and refueling function will be canceled, and the diagnostic tool will prompt the repair personnel to "start the engine and then re-enter the service and refueling mode."

[0133] The timer starts, waiting 35 seconds. During this time, the diagnostic tool will display a message to the technician: "Adding coolant. Please continuously add coolant to the MAX line of the expansion tank until the adding is complete." The diagnostic tool sends command 22 to the ATC to read the ECV1 water valve fault status bit, confirming whether the ECV1 water valve has moved to the target position as instructed, and confirming whether the ECV1 water valve is faulty. After sending command 22, the ATC will respond with command 62. If the ECV1 water valve is not faulty, proceed to the next step; if the ECV1 water valve is faulty, directly cancel the after-sales service adding function, and the diagnostic tool will display a message to the technician: "Turn off the engine and restart the service adding mode. If the ECV1 valve fault message reappears, check whether the heater valve is damaged." The diagnostic tool sends command 22 to the EMS to read the electronic thermostat fault status bit, confirming whether the electronic thermostat has moved to the target position as instructed, and confirming whether the electronic thermostat is faulty. After sending command 22, a response 62 will be received from EMS. If the electronic thermostat is functioning correctly, proceed to the next step; if the electronic thermostat is faulty, the after-sales service refill function will be canceled, and the diagnostic tool will prompt the technician to "turn off the engine and restart the service refill mode. If the thermostat is faulty again, check if the thermostat is damaged." A timer will be started, and the technician will wait 5 minutes. During this time, the diagnostic tool will prompt the technician to "refilling in progress. Please continuously add coolant to the MAX line of the expansion tank until the refilling is complete."

[0134] The diagnostic tool continuously prompts the technician to "accelerate to 2000-3000 rpm and continuously add coolant to the MAX line until the filling is complete." A timer is started, and the technician waits for 4 minutes. During this time, the diagnostic tool continues to display "accelerate to 2000-3000 rpm and continuously add coolant to the MAX line until the filling is complete." The diagnostic tool sends a 2F control command to the EMS, controlling the ECP2 water pump duty cycle to 85%. Upon successful transmission, the diagnostic tool receives a 6F feedback, confirming successful transmission. After receiving the 2F command, the EMS controls the ECP2 water pump duty cycle to 85%, and the ECP2 water pump provides real-time feedback to the EMS regarding its current status and fault conditions, including current, current duty cycle, stall, and dry running. A timer is started, and the technician waits for 3 minutes. During this time, the diagnostic tool continues to display "accelerate to 2000-3000 rpm and continuously add coolant to the MAX line until the filling is complete."

[0135] The diagnostic tool sends a 22 command to the EMS to read the status of ECP1 and ECP2, confirming whether ECP1 and ECP2 are operating according to the target duty cycle and whether there are any faults in ECP1 and ECP2. After sending the 22 command, a 62 response is received from the EMS. If ECP1 and ECP2 are not faulty, proceed to the next step; if ECP1 and ECP2 are faulty, the after-sales service and refilling function is directly cancelled, and the diagnostic tool prompts the maintenance personnel to "turn off the engine and restart the service and refilling mode. If ECP1 / ECP2 is faulty again, check whether the intercooler pump / heater pump is damaged." The EMS internally observes the current of ECP1 electric water pump 1. If the current of ECP1 electric water pump 1 is within the range of [a1, b1] for 5 seconds, and the current of ECP2 electric water pump 2 is within the range of [a2, b2] for 5 seconds, then the refilling is considered complete, and Filling Completed is set to 1. a1, b1, a2, and b2 are calibration values. The diagnostic tool periodically sends 22 commands to the EMS, with each cycle lasting 10 seconds, and reads whether Filling Completed is 1. When Filling Completed = 1 is read, the tool proceeds to the next step.

[0136] The diagnostic tool sends a 2F control command to the ATC, releasing control of the ECV1 valve. Upon successful transmission, the diagnostic tool receives a 6F feedback, confirming successful transmission. The diagnostic tool then sends a 2F control command to the EMS, releasing control of ECP1, ECP2, and the electronic thermostat. Upon successful transmission, the diagnostic tool receives a 6F feedback, confirming successful transmission. The diagnostic tool display shows "Coolant filling complete."

[0137] Furthermore, ECP1 and ECP2 determine the completion of coolant filling based on current: According to testing, when the water pump inlet pipe is not fully filled with coolant / contains air, the current fluctuates significantly and is lower than normal; when the water pump inlet pipe is fully filled with coolant / free of air, the current is normal and stable within a certain range. Electronic thermostat position feedback confirmation rule: Controlling the electronic thermostat to full open, if the reading is within 80% opening or fully open, it is considered successful and without problems. ECV1 position feedback confirmation rule: Controlling ECV1 to full open, if the reading is within 80% opening or fully open, it is considered successful and without problems. ECP1 duty cycle feedback confirmation rule: Controlling the ECP1 duty cycle to 85%, if the reading is between 70% and 85%, it is considered without problems. ECP2 duty cycle feedback confirmation rule: Controlling the ECP2 duty cycle to 85%, if the reading is between 70% and 85%, it is considered without problems.

[0138] As an example, the following is another specific embodiment of the present invention to help those skilled in the art understand the technical solution, describing the implementation of the coolant after-sales maintenance and filling strategy from the perspective of maintenance personnel.

[0139] After the mechanics replaced the vehicle parts, some coolant was lost. The mechanics used a diagnostic tool to communicate with the vehicle to complete the coolant refill procedure. The mechanics opened the expansion tank cap and continuously added coolant until it reached the MAX line in the expansion tank, a process that lasted 5 minutes. The mechanics started the vehicle and brought it to idle. They then connected the diagnostic tool to the vehicle's On-Board Diagnostic (OBD) interface, allowing the diagnostic tool to communicate with the vehicle. The mechanics selected the current vehicle model, chose the coolant refill mode, and clicked "Confirm" to enter the refill mode. At this point, the diagnostic tool was working, controlling the ECV1 valve to 100% open, the ECP1 water pump duty cycle to 85%, and the electronic thermostat to be fully open. The diagnostic tool checked if the engine was running. If the diagnostic tool detected that the engine was running, it proceeded to the next step, prompting the mechanics with "Refilling in progress, please continue adding coolant to the MAX line in the expansion tank until the refill is complete." If the diagnostic tool detected that the engine was not running, it returned to the first step and prompted the mechanics. The diagnostic tool will display a countdown progress bar, which will last for 35 seconds. After the countdown ends, proceed to the next step.

[0140] The diagnostic tool sends command 22 to the ATC to read the fault status bit of the ECV1 water valve, confirming whether the ECV1 water valve has moved to the target position as instructed, and confirming whether the ECV1 water valve is faulty. If the ECV1 water valve is not faulty, proceed to the next step; if the ECV1 water valve is faulty, directly cancel the after-sales service and refueling function, and prompt the maintenance personnel on the diagnostic tool page to "turn off the engine and restart the service and refueling mode. If the ECV1 valve fault is indicated again, check whether the heater water valve is damaged." The diagnostic tool sends command 22 to the EMS to read the fault status bit of the electronic thermostat, confirming whether the electronic thermostat has moved to the target position as instructed, and confirming whether the electronic thermostat is faulty. If the electronic thermostat is not faulty, proceed to the next step; if the electronic thermostat is faulty, directly cancel the after-sales service and refueling function, and prompt the maintenance personnel on the diagnostic tool page to "turn off the engine and restart the service and refueling mode. If the thermostat fault is indicated again, check whether the thermostat is damaged."

[0141] If the diagnostic tool determines there are no issues, the screen will display "Adding coolant. Please continuously add coolant to the MAX line of the expansion tank until the adding is complete," along with a 5-minute countdown progress bar. The technician will then follow the diagnostic tool's instructions. After the countdown progress bar completes, the screen will display "Depress the accelerator to 2000-3000 rpm and continuously add coolant to the MAX line until the adding is complete," along with a 4-minute countdown progress bar. After the countdown progress bar completes, the diagnostic tool will send a 2F control command to the EMS to control the ECP2 water pump duty cycle to 85%. The diagnostic tool screen will then display "Depress the accelerator to 2000-3000 rpm and continuously add coolant to the MAX line until the adding is complete." The diagnostic tool will then send a 22 command to the EMS to read the status of ECP1 and ECP2, confirming whether ECP1 and ECP2 are operating at the target duty cycle and checking for any faults in ECP1 and ECP2. If ECP1 and ECP2 are functioning correctly, proceed to the next step. If ECP1 or ECP2 is faulty, cancel the after-sales service refueling function and prompt the technician via the diagnostic tool page to "turn off the engine and restart the service refueling mode. If ECP1 / ECP2 is faulty again, check if the intercooler pump / heater pump is damaged." The diagnostic tool periodically sends 22 commands to EMS, with each cycle lasting 10 seconds, to check if Filling Completed is 1. Once Filling Completed = 1 is read, proceed to the next step.

[0142] The technician followed the diagnostic tool's instructions. After the diagnostic tool read "Filling Completed 1," it sent a 2F control command to the ATC to release control of the ECV1 valve; it also sent a 2F control command to the EMS to release control of ECP1, ECP2, and the electronic thermostat. The diagnostic tool displayed "Coolant filling complete." The technician followed the diagnostic tool's instructions, and once the coolant filling was complete, disconnected the diagnostic tool from the vehicle, thus completing the operation.

[0143] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods of the various embodiments of the present invention.

[0144] This embodiment also provides a coolant filling device for implementing the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0145] Figure 4 This is a structural block diagram of a coolant filling device according to one embodiment of the present invention, as shown below. Figure 4 As shown, taking a coolant filling device 400 as an example, the device includes: a sending module 401, used to send first adjustment commands to the heater core valve, electronic thermostat, and first electric water pump respectively in coolant filling mode, wherein the coolant filling mode is used to replenish coolant to the vehicle, and the first adjustment commands are used to adjust the opening degree of the heater core valve and electronic thermostat and the duty cycle of the first electric water pump; a first acquisition module 402, used to acquire a first operating state of the engine, wherein the first operating state is used to determine whether the engine is in a started state; a second acquisition module 403, used to acquire fault status bits of the heater core valve and electronic thermostat respectively in response to the first operating state indicating that the engine is in a started state, wherein the fault status bits are used to indicate whether the heater core valve and electronic thermostat are in a normal operating state; and a filling module 404, used to fill the vehicle with coolant to a preset target line in response to the heater core valve and electronic thermostat being in a normal operating state, and to indicate that the coolant filling process of the vehicle is complete.

[0146] It should be noted that the above modules can be implemented by software or hardware. For the latter, they can be implemented in the following ways, but are not limited to: all the above modules are located in the same processor; or, the above modules are located in different processors in any combination.

[0147] According to one embodiment of the present invention, a vehicle is also provided, comprising: a memory storing an executable program; and a processor for running the executable program, wherein the executable program, when run on the processor, performs the coolant filling method described in any of the preceding claims.

[0148] Embodiments of the present invention also provide a computer-readable storage medium storing a computer program, wherein the computer program is configured to perform the steps in any of the above method embodiments when run on a computer or processor.

[0149] Optionally, in this embodiment, the computer-readable storage medium may be configured to store a computer program for performing the following steps:

[0150] Step S10: In the coolant filling mode, a first adjustment command is sent to the heater valve, the electronic thermostat and the first electric water pump respectively. The coolant filling mode is used to replenish coolant in the vehicle, and the first adjustment command is used to adjust the opening degree of the heater valve and the electronic thermostat as well as the duty cycle of the first electric water pump.

[0151] Step S12: Obtain the first operating state of the engine, wherein the first operating state is used to determine whether the engine is in the start state;

[0152] Step S14: In response to the first operating state indicating that the engine is in the start state, the fault status bits of the heater valve and the electronic thermostat are obtained respectively, wherein the fault status bits are used to indicate whether the heater valve and the electronic thermostat are in the normal operating state.

[0153] Step S16: In response to the fact that the heater valve and electronic thermostat are both in normal operating condition, add coolant to the vehicle to the preset target line and indicate that the coolant filling process is complete.

[0154] Optionally, in this embodiment, the computer-readable storage medium may include, but is not limited to, various media capable of storing computer programs, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0155] Embodiments of the present invention also provide an electronic device 500, please refer to... Figure 5 It includes a memory 501 and a processor 502, wherein the memory 501 stores a computer program and the processor 502 is configured to run the computer program to perform the steps in any of the above method embodiments.

[0156] Optionally, in this embodiment, the processor 502 in the above-described electronic device may be configured to run a computer program to perform the following steps:

[0157] Step S10: In the coolant filling mode, a first adjustment command is sent to the heater valve, the electronic thermostat and the first electric water pump respectively. The coolant filling mode is used to replenish coolant in the vehicle, and the first adjustment command is used to adjust the opening degree of the heater valve and the electronic thermostat as well as the duty cycle of the first electric water pump.

[0158] Step S12: Obtain the first operating state of the engine, wherein the first operating state is used to determine whether the engine is in the start state;

[0159] Step S14: In response to the first operating state indicating that the engine is in the start state, the fault status bits of the heater valve and the electronic thermostat are obtained respectively, wherein the fault status bits are used to indicate whether the heater valve and the electronic thermostat are in the normal operating state.

[0160] Step S16: In response to the fact that the heater valve and electronic thermostat are both in normal operating condition, add coolant to the vehicle to the preset target line and indicate that the coolant filling process is complete.

[0161] Embodiments of the present invention also provide a computer program product, including a computer program that, when executed by a processor, implements the steps in any of the above method embodiments.

[0162] Optionally, in this embodiment, the computer program in the above-described computer program product can be configured to perform the following steps when executed by a processor:

[0163] Step S10: In the coolant filling mode, a first adjustment command is sent to the heater valve, the electronic thermostat and the first electric water pump respectively. The coolant filling mode is used to replenish coolant in the vehicle, and the first adjustment command is used to adjust the opening degree of the heater valve and the electronic thermostat as well as the duty cycle of the first electric water pump.

[0164] Step S12: Obtain the first operating state of the engine, wherein the first operating state is used to determine whether the engine is in the start state;

[0165] Step S14: In response to the first operating state indicating that the engine is in the start state, the fault status bits of the heater valve and the electronic thermostat are obtained respectively, wherein the fault status bits are used to indicate whether the heater valve and the electronic thermostat are in the normal operating state.

[0166] Step S16: In response to the fact that the heater valve and electronic thermostat are both in normal operating condition, add coolant to the vehicle to the preset target line and indicate that the coolant filling process is complete.

[0167] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementations, and will not be repeated here.

[0168] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0169] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0170] In the several embodiments provided by this invention, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection can be through some interfaces; the indirect coupling or communication connection of units or modules can be electrical or other forms.

[0171] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0172] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0173] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0174] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for adding coolant, characterized in that, include: In the coolant filling mode, a first adjustment command is sent to the heater valve, the electronic thermostat, and the first electric water pump, respectively. The coolant filling mode is used to replenish coolant in the vehicle, and the first adjustment command is used to adjust the opening degree of the heater valve and the electronic thermostat, as well as the duty cycle of the first electric water pump. The first operating state of the engine is obtained, wherein the first operating state is used to determine whether the engine is in a start state; In response to the first operating state indicating that the engine is in the start state, the fault status bits of the heater valve and the electronic thermostat are respectively acquired, wherein the fault status bits are used to indicate whether the heater valve and the electronic thermostat are in the normal operating state; In response to the fact that both the heater valve and the electronic thermostat are in normal operating condition, the coolant is added to the vehicle to the preset target level, and the vehicle is notified that the coolant filling process is complete.

2. The method according to claim 1, characterized in that, The method further includes: In response to the fact that both the heater valve and the electronic thermostat are in normal operating condition, the engine speed is controlled to remain within a preset speed range.

3. The method according to claim 1, characterized in that, The method further includes: When adding coolant to the vehicle, a second adjustment command is sent to the second electric water pump, wherein the second adjustment command is used to adjust the duty cycle of the second electric water pump.

4. The method according to claim 3, characterized in that, The method further includes: Obtain the second operating status of the first electric water pump and the second electric water pump; Based on the second operating state, determine whether the first electric water pump and the second electric water pump are operating according to the target duty cycle, and obtain a first determination result; and / or, Based on the second operating state, it is determined whether the first electric water pump and the second electric water pump are faulty, and a second determination result is obtained.

5. The method according to claim 4, characterized in that, The method further includes: In response to the first determination result indicating that both the first electric water pump and the second electric water pump are operating according to the target duty cycle, and the second determination result indicating that both the first electric water pump and the second electric water pump are fault-free, the first current value of the first electric water pump and the second current value of the second electric water pump during the preset time period are obtained. In response to the first current value being continuously within the first current range during the preset time period and the second current value being continuously within the second current range during the preset time period, it is determined that the coolant filling process of the vehicle is completed.

6. The method according to claim 1, characterized in that, The method further includes: In response to the completion of the coolant filling process of the vehicle, control over the heater valve, the electronic thermostat, the first electric water pump, and the second electric water pump is released.

7. The method according to claim 1, characterized in that, The method further includes: The opening degree of the heating water valve is adjusted to the first degree by controlling the air conditioner controller through the diagnostic instrument; The diagnostic instrument controls the engine management system to adjust the opening of the electronic thermostat to the second opening. The diagnostic instrument controls the engine management system to adjust the duty cycle of the first electric water pump to the target duty cycle.

8. The method according to claim 1, characterized in that, The step of acquiring the fault status bits of the heater valve and the electronic thermostat respectively includes: The first fault status position of the heating water valve is obtained by controlling the air conditioner controller with a diagnostic instrument. In response to the first fault status bit indicating that the heater valve has moved to the first target position according to the preset command and there is no fault, the second fault status bit of the electronic thermostat is obtained by the engine management system controlled by the diagnostic tool. In response to the first fault status bit indicating that the heater valve is faulty, the system prompts to restart the coolant filling mode and determine whether the heater valve is damaged.

9. The method according to claim 8, characterized in that, The method further includes: In response to the second fault status bit indicating that the electronic thermostat has operated to the second target position according to the preset command and there is no fault, the coolant filling mode is maintained. In response to the second fault status bit indicating a fault in the electronic thermostat, a prompt is made to restart the coolant filling mode and determine whether the electronic thermostat is damaged.

10. A vehicle, characterized in that, include: Memory, which stores executable programs; A processor for running the executable program, wherein the executable program, when running on the processor, performs the coolant filling method as described in any one of claims 1 to 9.

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