Automobile cooling liquid filling control system and method

Abstract

The invention discloses an automobile cooling liquid filling control system which comprises a sensor module for detecting the volume of air in an automobile cooling liquid loop, and judging whether a water pump delay control device is started or not according to the ratio of the measured volume of the air to the volume of the automobile cooling liquid loop; when the water pump delay control device is started, the control module controls the water pump to execute a specific duty ratio in a delayed mode, air in an automobile cooling liquid loop is exhausted, and cooling liquid is added at the same time till the water pump delay time is reached; the control module controls the water pump to execute a set duty ratio after the delay time of the water pump is up, and the water pump is restarted after stopping running for a set time. The flow of the cooling liquid is accurately controlled by adjusting the duty ratio of the water pump, and normal operation of the cooling system is effectively maintained.

Description

Technical Field

[0001] The invention relates to the technical field of coolant filling, and in particular to a control system and method for filling coolant of an automobile. Background Art

[0002] There are generally two situations for refilling coolant in passenger cars: one is during the manufacturing stage of the vehicle, when the coolant is generally refilled with a special refilling machine by vacuuming the coolant pot. The other is during the after-sales maintenance stage of the vehicle, which is generally done manually.

[0003] If a filling machine is used in the factory, the filling gun will extract the air inside the entire cooling system, test the system's tightness, and then add coolant. However, during the after-sales maintenance stage, it is difficult to manually fill the vehicle during the after-sales maintenance process to exhaust the air in the circuit, resulting in insufficient coolant filling. When the vehicle is climbing a slope or driving vigorously, it is easy to cause the power system to overheat.

[0004] The current new energy electric vehicles have liquid-cooled batteries, motors, and HVAC cooling loops with large cooling volumes, complex systems, long pipes, and many valve parts. After-sales refueling that relies solely on static gravity refueling cannot meet the design goals of refueling and exhausting. Therefore, after-sales maintenance personnel are required to assist in coolant refueling. However, manual refueling is prone to irregular operations, resulting in poor refueling and exhausting effects, which can cause cooling system failures. Summary of the invention

[0005] The purpose of the present invention is to provide an automobile coolant filling control system and method. The purpose of the present invention is to ensure that the manual filling process can ensure smooth circuit exhaust and ensure that after-sales filling can meet the filling volume target.

[0006] To achieve this purpose, the automobile coolant filling control system designed by the present invention comprises:

[0007] The sensor module is used to detect the air volume in the automobile coolant circuit, and judge whether to start the water pump delay control device by the ratio of the measured air volume to the automobile coolant circuit volume;

[0008] The control module is used to control the water pump delay to execute a specific duty cycle when the water pump delay control device is activated, exhaust the air in the vehicle coolant circuit, and add coolant at the same time until the water pump delay time is reached;

[0009] The control module is also used to control the water pump to execute a set duty cycle after the water pump delay time is reached, and the water pump stops running for a set time and then restarts.

[0010] In the above technical solution, the control module is also used for automatically increasing the water pump delay time when the air volume in the automobile coolant circuit is still higher than A% of the automobile coolant circuit volume after the water pump delay time is reached, and the water pump delay control device automatically increases the water pump delay time.

[0011] In the above technical solution, it also includes an alarm module. At a set time before the automatically increased water pump delay time expires, when the air volume in the automobile coolant circuit detected by the automobile sensor module is still higher than A% of the automobile coolant circuit volume, the alarm module sends out an audible and visual alarm.

[0012] In the above technical solution, if the air volume in the automobile coolant circuit still cannot be controlled to A% or less of the automobile coolant circuit volume after the sound and light alarm, the pump is stopped for inspection.

[0013] In the above technical solution, the specific duty cycle is the duty cycle segment within the abnormal working range of the water pump; the set duty cycle is the other normal working duty cycles except the duty cycle when the water pump does not perform idling protection.

[0014] In the above technical solution, the setting conditions for starting the water pump delay control device are:

[0015] The ratio of air volume to the volume of the automobile coolant circuit is greater than B%.

[0016] In the above technical solution, the specific process of the water pump delaying the execution of a specific duty cycle is as follows:

[0017] The water pump delay control device is started, the interrupter high and low level selection pin IT0 selects a low level, and after the control chip in the control module detects the low level of the interrupter high and low level selection pin IT0, the interrupter interrupt flag IE1 is set to a high level, the control chip applies for an interrupt, and the timer starts timing, so that the water pump delay executes a specific duty cycle.

[0018] In the above technical solution, the specific process of the water pump executing the set duty cycle is:

[0019] When the timer reaches the set time, the interrupter high and low level selection pin IT0 selects a high level. After the control chip in the control module detects the high level of the interrupter high and low level selection pin IT0, the interrupt flag IE1 is set to a low level, and the control chip interrupt ends. At this time, the delay time is reached and the water pump starts to execute the set duty cycle.

[0020] A method for controlling the filling of automobile coolant, characterized in that it comprises the following steps:

[0021] Detect the air volume in the automobile coolant circuit, and determine whether to start the water pump delay control device based on the ratio of the measured air volume to the automobile coolant circuit volume;

[0022] When the water pump delay control device is activated, the water pump delay is controlled to execute a specific duty cycle, exhausting the air in the vehicle coolant circuit and adding coolant at the same time until the water pump delay time is reached;

[0023] After the water pump delay time is reached, the water pump is controlled to execute the set duty cycle, and the water pump stops running for the set time and then restarts.

[0024] A computer program product comprises a computer program, wherein the computer program implements the steps of the above method when executed by a processor.

[0025] Beneficial effects of the present invention:

[0026] By adjusting the duty cycle of the water pump (duty cycle refers to the ratio of the duration of the high level signal to the cycle), the flow of coolant can be accurately controlled to ensure that there is no excess or deficiency during the filling process, effectively maintaining the normal operation of the cooling system; setting a suitable duty cycle can make the water pump work in the optimal working state, improve the filling efficiency, and shorten the coolant filling time; precise flow control can reduce the waste of coolant and avoid coolant overflow caused by excessive filling during the filling process, thereby reducing the loss of coolant. At the same time, through precise control, the filling process will not cause too much impact on the system, which helps to extend the service life of the water pump and the entire cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 It is a schematic diagram of the working state of the present invention;

[0029] Figure 3 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0031] Example 1

[0032] A vehicle coolant filling control system, such as Figure 1 and Figure 2 (Among them, the "small three electrics" include OBC on-board charger, DCDC voltage converter, and PDU high-voltage distribution box) as shown, it includes:

[0033] The sensor module is used to detect the volume of air in the automobile coolant circuit, and the ratio of the measured air volume to the volume of the automobile coolant circuit is used to determine the ratio of the coolant to the volume of the automobile coolant circuit. The coolant and air are in a process of increase and decrease. For example, if the ratio of the air volume to the volume of the automobile coolant circuit is 20%, then the ratio of the coolant to the volume of the automobile coolant circuit is 80%. In this embodiment, the setting condition of the water pump start delay control device is: the ratio of the air volume detected by the sensor to the volume of the automobile coolant circuit is greater than 25%, that is, the coolant volume accounts for 80% of the automobile coolant circuit. The ratio of the volume of the cooling liquid circuit to the volume of the cooling liquid circuit is less than or equal to 75%), and it is judged whether to start the water pump delay control device. The design is installed in the automobile coolant circuit through the sensor module, and the air volume in the automobile coolant circuit is monitored in real time. The relative proportion of the air is judged by calculating the ratio of the detected air volume to the volume of the automobile coolant circuit. If the ratio of the air volume to the volume of the automobile coolant circuit exceeds a certain preset threshold value (in this embodiment, the preset threshold value is 25%), it indicates that there is too much air in the automobile coolant circuit, which may affect the flow of the coolant and the heat dissipation effect of the automobile system. The design can effectively prevent air blockage by monitoring and exhausting the air.

[0034] The control module is used to control the water pump to delay and execute a specific duty cycle (duty cycle refers to the ratio of the water pump working time to the total cycle time. By adjusting the duty cycle, the flow rate and efficiency of the water pump can be controlled to meet different working requirements) when the water pump delay control device is started (the water pump delay control device includes a control chip, an interrupter, a counter and an audible and visual alarm), discharge the air in the car coolant circuit, and add coolant at the same time until the water pump delay time is reached. Through delay control, the design allows enough time for the air in the coolant circuit to be naturally discharged before the water pump is started, avoiding the interference of air on the coolant circulation. Through precise delay control and duty cycle adjustment, the water pump can work according to the predetermined program and logic, and also improves the stability and reliability of the entire system;

[0035] The control module is also used to control the water pump to execute the set duty cycle after the water pump delay time is reached. The water pump stops running for a set time and then restarts. By setting the duty cycle, this design can accurately control the flow and efficiency of the water pump, ensuring that the coolant circulates more evenly and fully in the coolant circuit, thereby improving the cooling efficiency. The application in the water pump delay control device not only realizes the delayed start and duty cycle control of the water pump, but also further improves the efficiency and stability of the system through the setting of water pump stop and restart.

[0036] In the above technical solution, the control module is also used for automatically increasing the water pump delay time (the increase in the water pump delay time can be fixed or dynamically calculated based on the remaining amount of air volume, and the length of the delay time varies depending on the specific vehicle model and the design of the coolant circuit) when the air volume in the vehicle coolant circuit is still higher than A% of the vehicle coolant circuit volume after the water pump delay time is reached (in the present embodiment, A=20, i.e., the air volume in the vehicle coolant circuit is still higher than 20% of the vehicle coolant circuit volume, and this threshold value A (20%) is preset and can be adjusted according to the specific vehicle model and the design of the coolant circuit), and the water pump delay control device automatically increases the water pump delay time (the increase in the water pump delay time can be fixed or dynamically calculated based on the remaining amount of air volume, and the length of the delay time also varies depending on the specific vehicle model and the design of the coolant circuit); after the water pump delay time is reached, the above design will automatically adjust the water pump delay time according to the ratio of the air volume in the vehicle coolant circuit to the volume of the vehicle coolant circuit to ensure that the air in the system is effectively discharged.

[0037] In the above technical solution, it also includes an alarm module. At a set time before the automatically increased water pump delay time expires (i.e., when there is 1 minute left in the water pump delay time automatically increased by the water pump delay control device), when the air volume in the automobile coolant circuit detected by the automobile sensor module is still higher than A% of the automobile coolant circuit volume (in this embodiment, A=20, that is, the air volume in the automobile coolant circuit detected by the automobile sensor module is still higher than 20% of the automobile coolant circuit volume, and this threshold value A (20%) is preset and can be adjusted according to the specific vehicle model and the design of the coolant circuit), the alarm module sends out an audible and visual alarm;

[0038] When the water pump delay time is about to end, the above design determines whether to issue an audible and visual alarm by detecting whether the air volume in the car coolant circuit exceeds a preset threshold value A (20%) to ensure the normal operation of the car cooling system and the safety of the driver.

[0039] In the above technical scheme, if the air volume in the automobile coolant circuit still cannot be controlled within A% or less of the automobile coolant circuit volume after the sound and light alarm (in the present embodiment, A=20, i.e., the air volume in the automobile coolant circuit still cannot be controlled within 20% or less of the automobile coolant circuit volume after the sound and light alarm), the pump is stopped for inspection; the above design is used for immediately stopping the operation of the water pump and conducting a comprehensive inspection when the air volume in the automobile coolant circuit still cannot be controlled below the preset threshold value after the sound and light alarm, which can not only prevent further damage, but also ensure the safety and reliability of the automobile cooling system. Through careful inspection and necessary maintenance, the normal function of the system can be restored to ensure the normal operation of the automobile.

[0040] In the above technical scheme, the specific duty cycle is the duty cycle segment within the abnormal working range of the water pump (that is, when the water pump executes a specific duty cycle, it may not be able to effectively perform its design function, or may be damaged. The duty cycle within the abnormal working range may be too high or too low, resulting in water pump overload, overheating, increased vibration or decreased efficiency); the set duty cycle is the normal working duty cycle except the duty cycle when the water pump does not perform idling protection (the set duty cycle refers to all normal working duty cycles except those that do not perform idling protection (that is, prevent the water pump from running for a long time at no load or low load to reduce wear and energy consumption). These duty cycles are set according to the design parameters, working conditions and performance requirements of the water pump, and can ensure that the water pump can operate safely and efficiently); the above design ensures that the water pump operates within a safe and efficient range by reasonably setting and adjusting the duty cycle, thereby extending its service life and reducing maintenance costs.

[0041] In the above technical solution, the setting conditions for starting the water pump delay control device are:

[0042] The ratio of the air volume to the volume of the automobile coolant circuit is greater than B% (25%). In this embodiment, B is 25, and the specific value is calibrated according to different vehicles.

[0043] In the above technical solution, the specific process of the water pump delaying the execution of a specific duty cycle is as follows:

[0044] The water pump delay control device is started, the interrupter high and low level selection pin IT0 selects a low level, and after the control chip in the control module detects the low level of the interrupter high and low level selection pin IT0, the interrupter interrupt flag IE1 is set to a high level, the control chip applies for an interrupt, and the timer starts timing, so that the water pump delays the execution of a specific duty cycle; the above design is used to ensure that the water pump can work normally at the predetermined time and duty cycle.

[0045] In the above technical solution, the specific process of the water pump executing the set duty cycle is:

[0046] When the timer reaches the set time, the interrupter high and low level selection pin IT0 selects a high level. After the control chip in the control module detects the high level of the interrupter high and low level selection pin IT0, the interrupt flag IE1 is set to a low level, and the control chip interrupt ends. At this time, the delay time is reached and the water pump starts to execute the set duty cycle.

[0047] Example 2

[0048] A method for controlling the filling of automobile coolant, such as Figure 3As shown, the air volume in the automobile coolant circuit is detected, and the ratio of the measured air volume to the volume of the automobile coolant circuit is used to determine whether to start the water pump delay control device; when the water pump delay control device is started, the water pump is controlled to delay and execute a specific duty cycle to discharge the air in the automobile coolant circuit, and coolant is added at the same time until the water pump delay time is reached; after the water pump delay time is reached, the water pump is controlled to execute the set duty cycle, and the water pump stops running for a set time and then restarts.

[0049] The specific method of controlling the filling of automobile coolant includes the following steps:

[0050] Detect the air volume in the automobile coolant circuit, and determine whether to start the water pump delay control device based on the ratio of the measured air volume to the automobile coolant circuit volume;

[0051] When the water pump delay control device is activated, the water pump delay is controlled to execute a specific duty cycle, exhausting the air in the vehicle coolant circuit and adding coolant at the same time until the water pump delay time is reached;

[0052] After the water pump delay time is reached, the water pump is controlled to execute the set duty cycle, and the water pump stops running for the set time and then restarts.

[0053] Example 3

[0054] A computer program product includes a computer program, characterized in that when the computer program is executed by a processor, the steps of the method described in Example 2 are implemented.

[0055] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0056] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1A system that specifies the functions of a box or multiple boxes.

[0057] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a product including an instruction system, which is implemented in the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0058] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit its protection scope. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that after reading the present invention, those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the invention, but these changes, modifications or equivalent substitutions are all within the protection scope of the pending claims of the invention.

[0060] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. An automobile coolant filling control system, characterized in that: It includes: The sensor module is used to detect the air volume in the automobile coolant circuit, and judge whether to start the water pump delay control device by the ratio of the measured air volume to the automobile coolant circuit volume; The control module is used to control the water pump delay to execute a specific duty cycle when the water pump delay control device is activated, exhaust the air in the vehicle coolant circuit, and add coolant at the same time until the water pump delay time is reached; The control module is also used to control the water pump to execute a set duty cycle after the water pump delay time is reached, and the water pump stops running for a set time and then restarts.

2. The automobile coolant filling control system according to claim 1, characterized in that: The control module is also used for the water pump delay control device to automatically increase the water pump delay time when the air volume in the automobile coolant circuit is still higher than A% of the automobile coolant circuit volume after the water pump delay time is reached.

3. The automobile coolant filling control system according to claim 2, characterized in that: It also includes an alarm module. At a set moment before the automatically increased water pump delay time expires, when the air volume in the vehicle coolant circuit detected by the vehicle sensor module is still higher than A% of the vehicle coolant circuit volume, the alarm module sends out an audible and visual alarm.

4. The automobile coolant filling control system according to claim 3, characterized in that: If the air volume in the vehicle coolant circuit still cannot be controlled to A% or less of the vehicle coolant circuit volume after the sound and light alarm, stop the pump for inspection.

5. The automobile coolant filling control system according to claim 1, characterized in that: The specific duty cycle is a duty cycle segment within the abnormal working range of the water pump; the set duty cycle is a normal working duty cycle except the duty cycle for the water pump not to perform idling protection.

6. The automobile coolant filling control system according to claim 1, characterized in that: The setting conditions for starting the water pump delay control device are: The ratio of air volume to the volume of the automobile coolant circuit is greater than B%.

7. The automobile coolant filling control system according to claim 1, characterized in that: The specific process of the water pump delaying the execution of a specific duty cycle is as follows: The water pump delay control device is started, the interrupter high and low level selection pin IT0 selects a low level, and after the control chip in the control module detects the low level of the interrupter high and low level selection pin IT0, the interrupter interrupt flag IE1 is set to a high level, the control chip applies for an interrupt, and the timer starts timing, so that the water pump delay executes a specific duty cycle.

8. The automobile coolant filling control system according to claim 1, characterized in that: The specific process of the water pump executing the set duty cycle is as follows: When the timer reaches the set time, the interrupter high and low level selection pin IT0 selects a high level. After the control chip in the control module detects the high level of the interrupter high and low level selection pin IT0, the interrupt flag IE1 is set to a low level, and the control chip interrupt ends. At this time, the delay time is reached and the water pump starts to execute the set duty cycle.

9. A method for controlling the filling of automobile coolant, characterized in that: It follows the steps: Detect the air volume in the automobile coolant circuit, and determine whether to start the water pump delay control device based on the ratio of the measured air volume to the automobile coolant circuit volume; When the water pump delay control device is activated, the water pump delay is controlled to execute a specific duty cycle, exhausting the air in the vehicle coolant circuit and adding coolant at the same time until the water pump delay time is reached; After the water pump delay time is reached, the water pump is controlled to execute the set duty cycle, and the water pump stops running for the set time and then restarts.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method described in claim 9 are implemented.

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