Method, device and equipment for detecting the coolant filling quantity of an engine cooling system

Abstract

The application discloses a kind of detection method, device and equipment of the cooling liquid filling quantity of engine cooling system, comprising: filling cooling liquid to the expansion kettle of cooling system to the highest mark line position;Multiple control starts engine operation and after engine each operation stops, re-filling cooling liquid to the expansion kettle to the highest mark line position, until engine operation stops, the cooling liquid level height in expansion kettle is stabilized at the highest mark line position;The amount of cooling liquid filled in the expansion kettle each time is accumulated, to determine the cooling liquid filling quantity in cooling system.In the present application, cooling liquid is directly injected into the expansion kettle, and the engine is started multiple times, and cooling liquid is filled and supplemented when the engine stops each time, until the cooling liquid in the expansion kettle stabilizes at the highest mark line position, i.e.The filling quantity of cooling liquid in the cooling system can be accurately determined, to provide more accurate and reliable data basis for engine matching vehicle, which is beneficial to ensure the working performance of engine operation.

Description

Technical Field

[0001] This invention relates to the field of engine cooling technology, and in particular to a method, apparatus, and equipment for detecting the amount of coolant added to an engine cooling system. Background Technology

[0002] In the starting, lubrication, cooling, and fuel supply systems of a diesel engine, the main function of the cooling system is to dissipate the heat generated by the engine into the air, preventing the overall engine temperature from overheating, ensuring normal engine operation, and ensuring that the engine operates at an appropriate high temperature to maintain good performance, reduce component wear, and prevent engine efficiency from decreasing and thus increasing pollutant emissions. Therefore, the engine cooling system needs to have strong heat dissipation capacity, adjustable cooling intensity, and reliable operation.

[0003] Currently, diesel engines generally employ forced circulation water cooling systems, which use a water pump to force coolant to circulate within the cooling system. The amount of coolant required for the normal operation of the entire cooling system is a crucial parameter in the process of matching the diesel engine with the vehicle. Therefore, ensuring the accuracy of the required coolant level in the cooling system is essential for guaranteeing the performance of the diesel engine. Summary of the Invention

[0004] The purpose of this invention is to provide a method, apparatus, and equipment for detecting the coolant level in an engine cooling system, which can more accurately determine the coolant level in the cooling system, provide reliable data for subsequent vehicle configuration, and ensure good engine operation.

[0005] To solve the above-mentioned technical problems, the present invention provides a method for detecting the coolant level in an engine cooling system, comprising:

[0006] Add coolant to the expansion tank of the cooling system up to the highest mark;

[0007] The engine is started and run multiple times, and after each engine stops running, the coolant is refilled into the expansion tank to the maximum mark position until the coolant level in the expansion tank stabilizes at the maximum mark position when the engine stops running.

[0008] The amount of coolant added to the expansion tank each time is accumulated to determine the amount of coolant added to the cooling system.

[0009] In one optional embodiment of this application, adding coolant to the expansion tank in the cooling system up to the highest mark includes:

[0010] Add the coolant to the expansion tank until the liquid level reaches the highest mark, and let it stand for a preset time.

[0011] Determine whether the liquid level in the expansion tank has dropped below the highest mark.

[0012] If so, repeat the steps of adding coolant to the expansion tank until the liquid level reaches the highest mark and letting it stand for a preset time until the coolant level in the expansion tank stabilizes at the highest mark.

[0013] In one optional embodiment of this application, the coolant level in the expansion tank is stabilized at the maximum mark after the engine is repeatedly started and stopped, until the engine stops running.

[0014] Control the engine to start and run at a first speed for a preset duration;

[0015] When the engine stops running, determine whether the liquid level in the expansion tank has dropped below the highest mark.

[0016] If so, add the coolant to the expansion tank until the liquid level reaches the highest mark, and repeat the step of starting the engine and running it at the first speed for the preset time until the engine stops running and the coolant level in the expansion tank stabilizes at the highest mark.

[0017] Control the engine to start and operate at the second speed for the preset duration;

[0018] When the engine stops running, determine whether the liquid level in the expansion tank has dropped below the highest mark.

[0019] If so, add the coolant to the expansion tank until the liquid level reaches the highest mark, and repeat the step of starting the engine and running it at the second speed for the preset time until the engine stops running and the coolant level in the expansion tank stabilizes at the highest mark.

[0020] Control the engine to start and run at the third speed for the preset duration;

[0021] When the engine stops running, determine whether the liquid level in the expansion tank has dropped below the highest mark.

[0022] If so, add the coolant to the expansion tank until the liquid level reaches the highest mark, and repeat the step of starting the engine and running it at the third speed for the preset time until the engine stops running and the coolant level in the expansion tank stabilizes at the highest mark.

[0023] Wherein, the first rotational speed is less than the second rotational speed, and the second rotational speed is less than the third rotational speed.

[0024] In one optional embodiment of this application, the first rotational speed is no greater than 600 rpm; the second rotational speed is 750 rpm to 850 rpm; and the third rotational speed is no less than 1000 rpm.

[0025] The preset duration is no less than 10 minutes.

[0026] In an optional embodiment of this application, after the coolant level in the expansion tank stabilizes at the highest mark when the engine stops running, and before determining the coolant level in the cooling system by accumulating the amount of coolant added to the expansion tank each time, the method further includes:

[0027] The engine is allowed to stand until the temperature of the coolant in the expansion tank drops to room temperature;

[0028] Determine whether the liquid level in the expansion tank has dropped below the highest mark.

[0029] If so, add the coolant into the expansion vessel up to the highest mark.

[0030] In one optional embodiment of this application, a glass tube is further provided on the exhaust pipe between the engine and the expansion tank;

[0031] If no bubbles are generated inside the glass tube when the engine is started, the cooling system will not exhaust properly.

[0032] In an optional embodiment of this application, after determining the amount of coolant added to the cooling system, the method further includes:

[0033] The difference between the coolant filling amount and the theoretical coolant filling amount is calculated. If the difference calculation result is greater than the deviation threshold, the filling amount detection result is abnormal.

[0034] A device for detecting the coolant level in an engine cooling system, comprising:

[0035] The liquid injection module is used to fill the expansion tank of the cooling system with coolant up to the highest mark.

[0036] The control start module is used to control the engine to start running multiple times and to refill the coolant into the expansion tank to the maximum mark position after each engine stops running, until the coolant level in the expansion tank is stable at the maximum mark position when the engine stops running.

[0037] The coolant filling amount calculation module is used to accumulate the amount of coolant added to the expansion tank each time to determine the coolant filling amount in the cooling system.

[0038] A device for detecting the coolant level in an engine cooling system, comprising:

[0039] A water tank containing coolant;

[0040] An output pipe connected to the water storage tank for adding coolant to the expansion tank of the cooling system;

[0041] The output pipe is equipped with an electric control valve for controlling the coolant output and a flow meter for detecting the amount of coolant added to the expansion tank.

[0042] A level gauge used to detect the liquid level of the coolant in the expansion tank;

[0043] The processor, connected to the electric control valve, is used to control the closing and opening of the electric control valve; the processor is also connected to the flow meter, the level gauge, and the engine starting system, and is used to control the engine to start based on the coolant filling amount detected by the flow meter and the liquid level height detected by the level gauge, so as to execute the steps of the method for detecting the coolant filling amount of the engine cooling system as described above.

[0044] In one optional embodiment of this application, the level gauge is disposed at the output port of the output pipe.

[0045] The present invention provides a method, apparatus, and device for detecting the coolant level in an engine cooling system, comprising: adding coolant to the expansion tank of the cooling system up to the maximum mark; repeatedly starting and running the engine and adding coolant to the expansion tank up to the maximum mark after each engine stop, until the coolant level in the expansion tank stabilizes at the maximum mark when the engine stops; and accumulating the amount of coolant added to the expansion tank each time to determine the coolant level in the cooling system.

[0046] In this application, to obtain a more accurate coolant filling amount in the engine's cooling system, coolant is directly injected into the expansion tank of the cooling system. The coolant filling amount is determined by the actual amount of coolant that can be injected into the cooling system. To ensure that the coolant fully fills the entire coolant circulation loop of the cooling system, the engine is repeatedly started and run, and coolant is added to the expansion tank each time the engine stops running, until the coolant level in the expansion tank stabilizes at the highest mark when the engine stops running. This indicates that the coolant fully fills the entire coolant circulation loop. The total amount of coolant added each time can accurately determine the coolant filling amount in the cooling system, providing more accurate and reliable data for engine matching with the vehicle, which is beneficial to ensuring the engine's actual operating performance. Attached Figure Description

[0047] To more clearly illustrate the technical solutions of the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 A flowchart illustrating the method for detecting the coolant level in an engine cooling system provided in this application embodiment;

[0049] Figure 2 This is a schematic diagram of the frame structure of the engine cooling system.

[0050] Figure 3 A schematic diagram of the frame structure of the coolant filling quantity detection device for the engine cooling system provided in this embodiment of the application;

[0051] Figure 4 A structural block diagram of the coolant filling quantity detection device for an engine cooling system provided in an embodiment of the present invention. Detailed Implementation

[0052] Currently, during the production and R&D phase of diesel engines, the amount of coolant required in the cooling system is generally estimated by staff based on the actual design of the coolant circulation loop in the cooling system. This method of determining the coolant level is inaccurate and can even negatively impact the engine's performance during subsequent operation.

[0053] Therefore, this application provides a technical solution that can accurately determine the amount of coolant added to the engine cooling system, providing reliable data for matching diesel engines with complete vehicles and helping to ensure the engine's working performance.

[0054] To enable those skilled in the art to better understand the present invention, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely 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 are within the scope of protection of the present invention.

[0055] like Figure 1 and Figure 2 As shown, Figure 1 A flowchart illustrating the method for detecting the coolant level in an engine cooling system provided in this application embodiment; Figure 2 This is a schematic diagram of the frame structure of the engine cooling system.

[0056] In one specific embodiment of this application, the method for detecting the coolant level in the engine cooling system may include:

[0057] S1: Add coolant to the expansion tank of the cooling system up to the highest mark.

[0058] like Figure 2 As shown, the expansion tank of the cooling system is the inlet component for adding coolant; after being injected through the expansion tank, the coolant can flow into the coolant flow channel and water tank inside the engine, so that the coolant circulation loop formed by the coolant channel and water tank inside the engine is filled with coolant.

[0059] Understandably, given the relatively small volume of the expansion tank, it's easy to fill it quickly during coolant injection, causing the coolant level to reach the maximum mark. However, as the coolant flows into the engine's internal coolant channels, the coolant level in the expansion tank will drop again.

[0060] Therefore, in one optional embodiment of this application, the process of adding coolant to the expansion tank up to the highest mark may include:

[0061] Add coolant to the expansion tank until the liquid level reaches the maximum mark, and let it stand for the preset time.

[0062] Determine if the liquid level in the expansion tank has dropped below the highest mark.

[0063] If so, repeat the steps of adding coolant to the expansion tank until the liquid level reaches the highest mark and letting it stand for a preset time until the coolant level in the expansion tank stabilizes at the highest mark.

[0064] In this embodiment, coolant is injected into the expansion tank multiple times as much as possible, that is, the amount of coolant injected into the engine is increased as much as possible before the engine is started, thereby avoiding excessive heat generation during subsequent engine start-up and operation. Furthermore, the preset settling time for each injection of coolant into the expansion tank should be no less than 10 minutes.

[0065] S2: Repeatedly start the engine and refill the expansion tank with coolant to the maximum mark after each engine stop, until the coolant level in the expansion tank stabilizes at the maximum mark when the engine stops running.

[0066] Understandably, as the engine runs, air in the coolant circulation loop can be gradually expelled from the engine, allowing coolant to be further injected into the engine.

[0067] To ensure that the coolant is injected and filled into the engine more fully, in this embodiment, the engine is started and run multiple times during the engine start-up process to avoid the engine not being able to expel all the air from the engine if it is started and run only once.

[0068] In addition, in another optional embodiment of this application, a transparent glass tube may be provided on the exhaust pipe connecting the engine and the expansion tank.

[0069] Therefore, if no air bubbles are generated inside the glass tube when the engine is started, it indicates that the cooling system is not venting properly. This allows for the timely detection of ventilation problems in the cooling system, enabling prompt repair and maintenance.

[0070] S3: Accumulate the amount of coolant added to the expansion tank each time to determine the amount of coolant added to the cooling system.

[0071] As the engine runs, the air in the cooling system is gradually expelled. If the liquid level in the expansion tank can be kept stable at the highest mark and no longer drop, then the entire cooling system is basically completely filled with coolant. The total amount of coolant added to the expansion tank each time is the amount of coolant added to the cooling system.

[0072] It should be noted that, in order to automate the above detection methods, dedicated detection equipment can be set up. For example... Figure 3 As shown, Figure 3This is a schematic diagram of the frame structure of a coolant filling detection device for an engine cooling system provided in an embodiment of this application. The detection device may include a water tank 2 for storing coolant, the water tank 2 being connected to an output pipe 3, and the output port of the output pipe 3 extending directly above the expansion tank 1. Furthermore, the output pipe 3 is equipped with an electric control valve 4 for controlling coolant output and a flow meter 5 for detecting the amount of coolant injected into the expansion tank 1. A level gauge is also provided for detecting the coolant level in the expansion tank 1, and this level gauge may be fixedly connected to the output port of the output pipe 3. In addition, the electric control valve 4, the flow meter 5, and the level gauge are all connected to a processor 6.

[0073] When the coolant filling amount is detected, the processor 6 can first control the electric control valve 4 to open, allowing coolant to be injected into the expansion tank 1 through the output pipe 3 until the coolant in the expansion tank 1 reaches the maximum mark. At this time, the operator can input a stop filling signal to confirm that the liquid level at this time is the maximum mark height. The processor 6 can then use the liquid level height collected by the level gauge at this time as the reference liquid level height for the maximum mark height. After a preset set time, the processor 6 can automatically reopen the electric control valve 4, and the level gauge also uploads the detected liquid level data to the processor 6 in real time. When the detected liquid level data reaches the reference liquid level height, the processor 6 controls the electric control valve 4 to close. This process is repeated until the liquid level data measured by the level gauge is always at the reference liquid level height after a preset set time, thus completing the above step S1.

[0074] After completing step S1, processor 6 sends a start-up trigger signal to engine starting system 7, and after the engine has been running for a period of time, it sends a stop-run trigger signal to start system 7 to stop the engine. Then, it controls electric control valve 4 to open and receives liquid level data detected by level gauge in real time. When the liquid level data reaches the reference liquid level height, it controls electric control valve 4 to close and repeats the process of sending start-up trigger signals. This process is repeated until the engine stops running and the liquid level data measured by level gauge remains at the reference liquid level height, thus realizing step S2.

[0075] During the implementation of steps S1 and S2, the flow meter 5 on the output pipe 3 transmits the flow rate of the coolant output in the output pipe 3 to the processor 6 in real time. The processor 6 can then easily determine the total amount of coolant injected into the expansion tank 1 during the entire detection process based on the flow data of the flow meter 5.

[0076] Compared to manually injecting coolant into the expansion tank to check the coolant level, this application utilizes testing equipment to achieve automated testing, which improves testing efficiency and the accuracy of calculating the coolant level, while reducing the workload of staff.

[0077] In summary, to obtain a more accurate amount of coolant added to the engine cooling system, this application directly injects coolant into the expansion tank of the cooling system, and determines the coolant addition amount based on the final amount of coolant injected. To ensure that the coolant fully fills the entire cooling system circulation loop, the engine is repeatedly started and run, and coolant is added each time the engine stops running, until the coolant in the expansion tank stabilizes at the maximum mark. At this point, the coolant fully fills the entire coolant circulation loop. The total amount of coolant added each time can accurately determine the amount of coolant added to the cooling system, providing more accurate and reliable data for engine matching with the vehicle, which is beneficial for ensuring the engine's actual operating performance.

[0078] Based on the above discussion, in order to further ensure that the coolant flows fully into the engine and fills the coolant circulation loop, in another optional embodiment of this application, the process of step S2 may further include:

[0079] S21: Control the engine to start and run at the first speed for a preset duration;

[0080] S22: When the engine stops running, determine whether the coolant level in the expansion tank has dropped below the maximum mark. If yes, proceed to S23. If no, the coolant level in the expansion tank stabilizes at the maximum mark when the engine stops running, and proceed to S24.

[0081] S23: Add coolant to the expansion tank until the liquid level reaches the highest mark, and then proceed to S21.

[0082] S24: Control the engine to start and run at the second speed for a preset duration;

[0083] S25: When the engine stops running, determine whether the coolant level in the expansion tank has dropped below the maximum mark. If yes, proceed to S26. If no, the coolant level in the expansion tank stabilizes at the maximum mark when the engine stops running, and proceed to S27.

[0084] S26: Add coolant to the expansion tank until the liquid level reaches the highest mark, then proceed to S24.

[0085] S27: Start the engine and run it at the third speed for a preset duration;

[0086] S28: When the engine stops running, determine whether the coolant level in the expansion tank has dropped below the highest mark. If yes, proceed to S29. If no, the coolant level in the expansion tank will stabilize at the highest mark after the engine stops running.

[0087] S29: Add coolant to the expansion tank until the liquid level reaches the highest mark, then proceed to S27.

[0088] The first speed is less than the second speed, and the second speed is less than the third speed.

[0089] In practical applications, the first speed can be no more than 600 rpm; the second speed can be 750 rpm to 850 rpm; and the third speed can be no less than 1000 rpm.

[0090] In this embodiment, during the repeated engine start-up process, the engine is controlled to start at gradually increasing first, second, and third speeds. On the one hand, this avoids the engine running at high speed when the coolant is insufficient, which would cause the engine to overheat and affect its service life. On the other hand, it ensures that the engine can eventually rotate at high speed, thereby more fully expelling the air from the engine and ensuring that the coolant is fully filled into the engine, thus ensuring the accuracy of the final determined amount of coolant added.

[0091] Furthermore, in another optional embodiment of this application, if the coolant level in the expansion tank does not drop after the engine has run sufficiently multiple times, it may further include:

[0092] Let the engine stand until the coolant temperature in the expansion tank drops to room temperature;

[0093] Determine if the liquid level in the expansion tank has dropped below the highest mark.

[0094] If so, add coolant to the expansion tank up to the highest mark.

[0095] In this embodiment, to avoid inaccurate coolant filling amounts due to a large number of air bubbles in the coolant that cannot be properly expelled in a short time during engine operation, a further determination is made after the coolant temperature has completely cooled down to check if the coolant level in the expansion tank has dropped. If the level has dropped, coolant is added again to ensure the accuracy of the final test results.

[0096] Based on any of the above embodiments, in an optional embodiment of this application, after determining the amount of coolant added to the cooling system, the method further includes:

[0097] The difference between the coolant filling amount and the theoretical coolant filling amount is calculated. If the difference is greater than the deviation threshold, the filling amount detection result is abnormal.

[0098] Generally, based on experience or the internal structure of the cooling system, staff can roughly estimate the theoretical coolant level. Under normal circumstances, the coolant level in the system should not differ significantly from the estimated theoretical level. However, if there is a large discrepancy, it may indicate a cooling system malfunction, prompting staff to conduct an inspection.

[0099] The following describes the coolant filling quantity detection device for the engine cooling system provided in the embodiments of the present invention. The coolant filling quantity detection device for the engine cooling system described below and the coolant filling quantity detection method for the engine cooling system described above can be referred to in correspondence with each other.

[0100] Figure 4 The structural block diagram of the coolant filling quantity detection device for the engine cooling system provided in this embodiment of the invention is shown below. Figure 4 The device for detecting the coolant level in the engine cooling system may include:

[0101] The liquid injection module 100 is used to add coolant to the expansion tank of the cooling system up to the highest mark position;

[0102] The control start module 200 is used to control the engine to start running multiple times and to refill the coolant into the expansion tank to the maximum mark position after each engine stops running, until the coolant level in the expansion tank is stable at the maximum mark position when the engine stops running.

[0103] The filling amount calculation module 300 is used to accumulate the amount of coolant added to the expansion tank each time to determine the amount of coolant added to the cooling system.

[0104] In an optional embodiment of this application, the liquid injection module 100 is specifically used to add the coolant to the expansion tank until the liquid level reaches the highest mark, and let it stand for a preset time; determine whether the liquid level in the expansion tank has dropped below the highest mark; if so, repeat the steps of adding the coolant to the expansion tank until the liquid level reaches the highest mark and letting it stand for a preset time until the coolant level in the expansion tank stabilizes at the highest mark.

[0105] In one optional embodiment of this application, the control startup module 200 includes:

[0106] The first control unit is used to control the engine to start running at a first speed for a preset time; when the engine stops running, it determines whether the liquid level in the expansion tank has dropped below the highest mark; if so, it adds coolant to the expansion tank until the liquid level reaches the highest mark, and repeats the step of starting the engine to run at the first speed for the preset time until the coolant level in the expansion tank stabilizes at the highest mark when the engine stops running.

[0107] The second control unit is used to control the engine to start running at the second speed for the preset duration; when the engine stops running, it determines whether the liquid level in the expansion tank has dropped below the highest mark; if so, it adds coolant to the expansion tank until the liquid level reaches the highest mark, and repeats the step of starting the engine to run at the second speed for the preset duration until the coolant level in the expansion tank stabilizes at the highest mark when the engine stops running;

[0108] The third control unit is used to control the engine to start running at a third speed for a preset duration; when the engine stops running, it determines whether the liquid level in the expansion tank has dropped below the highest mark; if so, it adds coolant to the expansion tank until the liquid level reaches the highest mark, and repeats the step of starting the engine to run at the third speed for the preset duration until the coolant level in the expansion tank stabilizes at the highest mark when the engine stops running;

[0109] Wherein, the first rotational speed is less than the second rotational speed, and the second rotational speed is less than the third rotational speed.

[0110] In one optional embodiment of this application, the first rotational speed is no greater than 600 rpm; the second rotational speed is 750 rpm to 850 rpm; the third rotational speed is no less than 1000 rpm; and the preset duration is no less than 10 minutes.

[0111] In an optional embodiment of this application, the control start module 200 is further configured to, after the coolant level in the expansion tank stabilizes at the highest mark when the engine stops running, and before the amount of coolant added to the expansion tank each time is accumulated to determine the amount of coolant added to the cooling system, allow the engine to stand until the coolant temperature in the expansion tank drops to room temperature; determine whether the coolant level in the expansion tank has dropped below the highest mark; if so, add coolant to the expansion tank up to the highest mark.

[0112] In one optional embodiment of this application, a glass tube is further provided on the exhaust pipe between the engine and the expansion tank;

[0113] It also includes an exhaust detection module, which is used to detect if the cooling system is not properly ventilated when the engine is started and running, provided that no air bubbles are generated in the glass tube.

[0114] In an optional embodiment of this application, an anomaly detection module is further included, which is used to perform a difference calculation between the coolant filling amount and the theoretical coolant filling amount after determining the coolant filling amount in the cooling system. If the difference calculation result is greater than the deviation threshold, the filling amount detection result is abnormal.

[0115] The coolant filling quantity detection device of the engine cooling system in this embodiment is used to implement the aforementioned method for detecting the coolant filling quantity of the engine cooling system. Therefore, the specific implementation of the coolant filling quantity detection device of the engine cooling system can be found in the embodiment section of the method for detecting the coolant filling quantity of the engine cooling system above, and will not be repeated here.

[0116] This application also provides a device for detecting the coolant level in an engine cooling system, such as... Figure 3 As shown, the testing device may include:

[0117] Water tank 2 containing coolant;

[0118] The output pipe 3 is connected to the water storage tank 2 and is used to add coolant to the expansion tank 1 of the cooling system;

[0119] The output pipe 3 is equipped with an electric control valve 4 for controlling the coolant output and a flow meter 5 for detecting the amount of coolant added to the expansion tank 1;

[0120] A level gauge used to detect the liquid level of coolant in an expansion tank;

[0121] The processor 6, connected to the electric control valve 4, is used to control the closing and opening of the electric control valve 4; the processor 6 is also connected to the flow meter 5, the level gauge and the engine starting system 7, and is used to control the engine to start based on the coolant output amount detected by the flow meter 5 and the level detected by the level gauge, so as to execute the steps of the method for detecting the coolant charge amount of the engine cooling system as described above.

[0122] Optionally, the level gauge is installed at the output port of the output pipe 3.

[0123] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that the elements inherent in a process, method, article, or apparatus that includes a list of elements are included. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Additionally, portions of the technical solutions provided in the embodiments of this application that are consistent with the implementation principles of corresponding technical solutions in the prior art have not been described in detail to avoid excessive elaboration.

[0124] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A method for detecting the coolant level in an engine cooling system, characterized in that, include: Add coolant to the expansion tank of the cooling system up to the highest mark; The engine is started and run multiple times, and after each engine stops running, the coolant is refilled into the expansion tank to the maximum mark position until the coolant level in the expansion tank stabilizes at the maximum mark position when the engine stops running. The amount of coolant added to the expansion tank each time is accumulated to determine the amount of coolant added to the cooling system; The process involves repeatedly starting and running the engine, and after each engine stop, refilling the expansion tank with coolant up to the maximum mark until the engine stops running, at which point the coolant level in the expansion tank stabilizes at the maximum mark. This includes: Control the engine to start and run at a first speed for a preset duration; When the engine stops running, determine whether the liquid level in the expansion tank has dropped below the highest mark. If so, add the coolant to the expansion tank until the liquid level reaches the highest mark, and repeat the step of starting the engine and running it at the first speed for the preset time until the engine stops running and the coolant level in the expansion tank stabilizes at the highest mark. Control the engine to start and operate at the second speed for the preset duration; When the engine stops running, determine whether the liquid level in the expansion tank has dropped below the highest mark. If so, add the coolant to the expansion tank until the liquid level reaches the highest mark, and repeat the step of starting the engine and running it at the second speed for the preset time until the engine stops running and the coolant level in the expansion tank stabilizes at the highest mark. Control the engine to start and run at the third speed for the preset duration; When the engine stops running, determine whether the liquid level in the expansion tank has dropped below the highest mark. If so, add the coolant to the expansion tank until the liquid level reaches the highest mark, and repeat the step of starting the engine and running it at the third speed for the preset time until the engine stops running and the coolant level in the expansion tank stabilizes at the highest mark. Wherein, the first rotational speed is less than the second rotational speed, and the second rotational speed is less than the third rotational speed.

2. The method for detecting the coolant level in an engine cooling system as described in claim 1, characterized in that, Add coolant to the expansion tank in the cooling system up to the maximum mark, including: Add the coolant to the expansion tank until the liquid level reaches the highest mark, and let it stand for a preset time. Determine whether the liquid level in the expansion tank has dropped below the highest mark. If so, repeat the steps of adding coolant to the expansion tank until the liquid level reaches the highest mark and letting it stand for a preset time until the coolant level in the expansion tank stabilizes at the highest mark.

3. The method for detecting the coolant level in an engine cooling system as described in claim 1, characterized in that, The first rotational speed is no greater than 600 rpm; the second rotational speed is 750 rpm to 850 rpm; the third rotational speed is no less than 1000 rpm. The preset duration is no less than 10 minutes.

4. The method for detecting the coolant level in an engine cooling system as described in claim 1, characterized in that, After the coolant level in the expansion tank stabilizes at the highest mark when the engine stops running, and before determining the coolant level in the cooling system by accumulating the amount of coolant added to the expansion tank each time, the process further includes: The engine is allowed to stand until the coolant temperature in the expansion tank drops to room temperature; it is then determined whether the coolant level in the expansion tank has dropped below the maximum mark. If so, add the coolant into the expansion vessel up to the highest mark.

5. The method for detecting the coolant level in an engine cooling system as described in claim 1, characterized in that, A glass tube is also provided on the exhaust pipe between the engine and the expansion tank; If no bubbles are generated inside the glass tube when the engine is started, the cooling system will not exhaust properly.

6. The method for detecting the coolant level in an engine cooling system as described in claim 1, characterized in that, After determining the coolant charge level in the cooling system, the process also includes: The difference between the coolant filling amount and the theoretical coolant filling amount is calculated. If the difference calculation result is greater than the deviation threshold, the filling amount detection result is abnormal.

7. A device for detecting the coolant level in an engine cooling system, characterized in that, include: The liquid injection module is used to fill the expansion tank of the cooling system with coolant up to the highest mark. The control start module is used to control the engine to start running multiple times and to refill the coolant into the expansion tank to the maximum mark position after each engine stops running, until the coolant level in the expansion tank is stable at the maximum mark position when the engine stops running. The coolant filling amount calculation module is used to accumulate the amount of coolant added to the expansion tank each time to determine the coolant filling amount in the cooling system; The control startup module specifically includes: The first control unit is used to control the engine to start running at a first speed for a preset time; when the engine stops running, it determines whether the liquid level in the expansion tank has dropped below the highest mark; if so, it adds coolant to the expansion tank until the liquid level reaches the highest mark, and repeats the step of starting the engine to run at the first speed for the preset time until the coolant level in the expansion tank stabilizes at the highest mark when the engine stops running. The second control unit is used to control the engine to start running at the second speed for the preset duration; when the engine stops running, it determines whether the liquid level in the expansion tank has dropped below the highest mark; if so, it adds coolant to the expansion tank until the liquid level reaches the highest mark, and repeats the step of starting the engine to run at the second speed for the preset duration until the coolant level in the expansion tank stabilizes at the highest mark when the engine stops running; The third control unit is used to control the engine to start running at a third speed for a preset duration; when the engine stops running, it determines whether the liquid level in the expansion tank has dropped below the highest mark; if so, it adds coolant to the expansion tank until the liquid level reaches the highest mark, and repeats the step of starting the engine to run at the third speed for the preset duration until the coolant level in the expansion tank stabilizes at the highest mark when the engine stops running; Wherein, the first rotational speed is less than the second rotational speed, and the second rotational speed is less than the third rotational speed.

8. A device for detecting the coolant level in an engine cooling system, characterized in that, include: A water tank containing coolant; An output pipe connected to the water storage tank for adding coolant to the expansion tank of the cooling system; The output pipe is equipped with an electric control valve for controlling the coolant output and a flow meter for detecting the amount of coolant added to the expansion tank. A level gauge used to detect the liquid level of the coolant in the expansion tank; The processor, connected to the electric control valve, is used to control the closing and opening of the electric control valve; the processor is also connected to the flow meter, the level gauge, and the engine starting system, and is used to control the engine to start based on the coolant filling amount detected by the flow meter and the liquid level height detected by the level gauge, so as to execute the steps of the method for detecting the coolant filling amount of the engine cooling system as described in any one of claims 1 to 6.

9. The device for detecting the coolant level in an engine cooling system as described in claim 8, characterized in that, The level gauge is installed at the output port of the output pipe.

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