A method of testing a dpf regeneration of an engine of a crane

Abstract

The application discloses a kind of engine DPF regeneration test methods of crane, can verify and examine the regeneration effect of crane engine DPF, with good representativeness and repeatability, and operability is strong, to provide strong data support, for the adaptive adjustment of truck crane vehicle working condition is carried out.The application includes: control crane engine start, when determining the water temperature of the engine is greater than the preset temperature, control the engine DPF regeneration;Control the crane continuous work first preset time, the continuous work includes: in turn no boom uploading operation, no boom slewing operation, arm operation, arm operation, arm operation, maximum arm spread uploading operation and maximum arm spread slewing operation;After the crane continuous work reaches the first preset time, control the crane intermittent work second preset time.

Description

Technical Field

[0001] This application relates to the field of crane testing technology, and in particular to a method for testing the regeneration of a crane engine's DPF. Background Technology

[0002] To meet the stricter China VI emission requirements, DPF devices must be used in automotive aftertreatment systems to reduce particulate matter emissions. However, as operating time accumulates, the DPF device captures more and more particulate matter, which can cause the back pressure of the vehicle's exhaust system to rise, leading to a deterioration in the vehicle's power and fuel economy. In severe cases, it can cause abnormal regeneration, resulting in damage to the aftertreatment device.

[0003] Truck cranes, as important engineering vehicles, are classified into cranes and truck-mounted cranes. Due to the characteristics of their operation, truck cranes have relatively low engine speeds and intermittent operation, which significantly impacts the regeneration efficiency of the DPF (Diesel Particulate Filter). Therefore, it is necessary to measure DPF data for truck cranes operating under different conditions to address issues such as DPF overload and blockage that prevent normal vehicle use. However, existing measurement methods lack sufficient data support to adapt to the specific operating conditions of truck cranes, resulting in low operating efficiency. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a method for testing the regeneration of the DPF (Digital Power Filter) of a crane engine.

[0005] The technical solution provided in this application is described below:

[0006] This application provides a method for testing the regeneration of the DPF (Digital Power Filter) of a crane engine, the method comprising:

[0007] Control the start of the crane's engine; when it is determined that the engine's water temperature is greater than a preset temperature, control the engine to perform DPF regeneration.

[0008] The crane is controlled to work continuously for a first preset time. The continuous work includes: sequentially performing loading and unloading operations without boom extension, slewing operations without boom extension, boom extension operations, boom swing operations, boom retraction operations, loading and unloading operations with maximum boom extension, and slewing operations with maximum boom extension.

[0009] After the crane has worked continuously for the first preset time, the crane is controlled to work intermittently for a second preset time.

[0010] After a first preset time of continuous operation and a second preset time of intermittent operation, determine whether the regeneration temperature of the DPF meets the preset conditions.

[0011] If so, control the engine to perform the DPF regeneration test again;

[0012] If not, adjust the control parameters and repeat the above test operation until the regeneration temperature of the DPF meets the preset conditions, then control the engine to perform the DPF regeneration test again.

[0013] Optionally, when it is determined that the engine's water temperature is greater than a preset temperature, controlling the engine to perform DPF regeneration includes:

[0014] When the engine water temperature is determined to be greater than 60°C, the engine is controlled to perform DPF regeneration.

[0015] Optionally, controlling the crane to operate continuously for a first preset time includes:

[0016] Control the crane to work continuously for 30 minutes. The continuous work includes: sequentially performing loading operations without boom extension, slewing operations without boom extension, boom extension operations, boom swing operations, boom retraction operations, loading operations with maximum boom extension, and slewing operations with maximum boom extension.

[0017] Optionally, the second preset time for controlling the intermittent operation of the crane includes:

[0018] The crane is controlled to work intermittently for 60 minutes, and the intermittent work for 60 minutes is carried out according to the following time: 5 minutes of idling, 10 minutes of continuous operation, 5 minutes of idling, 10 minutes of continuous operation, and so on, repeating the cycle 4 times to 60 minutes.

[0019] Optionally, after controlling the engine to perform the DPF regeneration test again, the method further includes:

[0020] Collect relevant parameters such as vehicle speed, gear position, engine speed, torque, main injection quantity, rear injection quantity, DOC inlet temperature, DPF inlet temperature, and ECU;

[0021] DPF regeneration verification was performed based on the relevant parameters.

[0022] Optionally, the second preset time for controlling the intermittent operation of the crane includes:

[0023] The crane is controlled to work intermittently for 60 minutes, and the intermittent work for 60 minutes is carried out according to the following time: 6 minutes of idling, 9 minutes of continuous operation, 9 minutes of idling, 9 minutes of continuous operation, and so on, repeating the cycle 4 times to 60 minutes.

[0024] Optionally, the second preset time for controlling the intermittent operation of the crane includes:

[0025] The crane is controlled to work intermittently for 60 minutes, and the intermittent work for 60 minutes is carried out according to the following time: 7 minutes of idling, 8 minutes of continuous operation, 7 minutes of idling, 8 minutes of continuous operation, and so on, repeating the cycle 4 times to 60 minutes.

[0026] Optionally, the second preset time for controlling the intermittent operation of the crane includes:

[0027] The crane is controlled to work intermittently for 60 minutes, and the intermittent work for 60 minutes is carried out according to the following time: idling for 4 minutes, continuous operation for 11 minutes, idling for 1 minute, continuous operation for 11 minutes, and so on, repeating the cycle 4 times to 60 minutes.

[0028] Optionally, the second preset time for controlling the intermittent operation of the crane includes:

[0029] The crane is controlled to work intermittently for 60 minutes, and the intermittent work for 60 minutes is carried out according to the following time: 3 minutes of idling, 12 minutes of continuous operation, 3 minutes of idling, 12 minutes of continuous operation, and so on, repeating the cycle 4 times to 60 minutes.

[0030] Optionally, the second preset time for controlling the intermittent operation of the crane includes:

[0031] The crane is controlled to work intermittently for 60 minutes, and the intermittent work for 60 minutes is carried out according to the following time: 2 minutes of idling, 13 minutes of continuous operation, 2 minutes of idling, 13 minutes of continuous operation, and so on, repeating the cycle 4 times to 60 minutes.

[0032] As can be seen from the above technical solutions, this application has the following advantages:

[0033] This application allows for DPF regeneration testing of crane engines, which can verify and evaluate the regeneration effect of crane engine DPF. It has good representativeness and repeatability, and is highly operable, thus providing strong data support for making adaptive adjustments to the vehicle operating conditions of truck cranes. It effectively solves the problem of vehicles being unable to operate normally due to DPF overload and blockage, thereby improving the working efficiency of truck cranes. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1This is a schematic diagram of an embodiment of the DPF regeneration test method for the crane engine of this application. Detailed Implementation

[0036] Due to the inherent characteristics of truck cranes, such as low engine operating speeds and intermittent operation, the regeneration efficiency of the DPF (Diesel Particulate Filter) is significantly affected. Therefore, it is necessary to measure DPF data for truck cranes operating under different conditions to address issues like DPF overload and blockage that prevent normal vehicle operation. However, existing measurement methods lack robust data support, hindering adaptive adjustments to the truck crane's operating conditions and resulting in low operating efficiency.

[0037] Based on this, this application provides a DPF regeneration test method for crane engines, which can perform DPF regeneration tests on crane engines, verify and evaluate the regeneration effect of crane engine DPF, has good representativeness and repeatability, and is highly operable, thus providing strong data support for making adaptive adjustments to the vehicle operating conditions of truck cranes, effectively solving the problem of vehicles being unable to operate normally due to DPF overload and blockage, thereby improving the working efficiency of truck cranes.

[0038] Please see Figure 1 This application first provides an embodiment of a DPF regeneration test method for a crane engine, the embodiment including:

[0039] 101. Control the start of the crane's engine; when it is determined that the engine's water temperature is greater than the preset temperature, control the engine to perform DPF regeneration.

[0040] In this embodiment, before performing carbon buildup detection on the crane vehicle, the crane engine is first started. Crane engine start-up control typically involves a series of safety and operational logics to ensure the engine starts and runs in optimal condition. This usually includes checking various system parameters, such as water temperature, oil pressure, and battery voltage, to ensure the engine is in a safe state before start-up. After the engine has been running for a period of time, the engine water temperature is monitored. When the engine water temperature exceeds 60°C, DPF regeneration is performed. DPF regeneration involves increasing the exhaust temperature to burn accumulated particulate matter and convert it into harmless substances, thereby maintaining the DPF's filtering performance while avoiding unnecessary damage to the engine. After controlling the engine to perform DPF regeneration, step 102 is executed.

[0041] 102. Control the crane to work continuously for a first preset time, wherein the continuous work includes: sequentially performing non-extension boom loading operation, non-extension boom slewing operation, boom extension operation, boom swing operation, boom retraction operation, maximum boom extension loading operation, and maximum boom extension slewing operation;

[0042] In this embodiment, the first preset time is 30 minutes, but it can also be set to other times according to the actual situation. That is, the crane is controlled to work continuously for 30 minutes. Continuous work includes: sequentially performing non-extension boom loading operations, non-extension boom slewing operations, boom extension operations, boom swing operations, boom retraction operations, maximum boom extension loading operations, and maximum boom extension slewing operations. During this continuous work process, the actual working time for each operation can be set according to the actual situation, and is not specifically limited here.

[0043] 103. After the crane has been working continuously for the first preset time, control the crane to work intermittently for a second preset time;

[0044] In this embodiment of the application, after determining that the continuous working time of the crane has reached 30 minutes, the crane is then controlled to work intermittently for a second preset time, wherein the second preset time is 60 minutes. There are several preferred cases for the intermittent working time, which are described below:

[0045] 1. Control the crane to operate intermittently for 60 minutes. This intermittent operation is performed according to the following schedule: 5 minutes of idling, 10 minutes of continuous operation, 5 minutes of idling, 10 minutes of continuous operation, repeating this cycle 4 times for a total of 60 minutes. The 5 minutes of idling means that the crane is in a non-working state and will not perform any work during these 5 minutes. After 5 minutes, it operates continuously for 10 minutes. The continuous operation process is the same as that in step 102 above and will not be repeated here. The actual working time for each stage of the continuous operation is also set according to the actual situation.

[0046] 2. Control the crane to operate intermittently for 60 minutes. This intermittent operation is performed according to the following schedule: 6 minutes of idling, 9 minutes of continuous operation, 9 minutes of idling, 9 minutes of continuous operation, and so on, repeating this cycle 4 times for a total of 60 minutes. The 6 minutes of idling means that the crane is in a non-working state and does not perform any work during these 6 minutes. After 6 minutes, it operates continuously for 9 minutes. The continuous operation process is the same as that in step 102 above and will not be repeated here. The actual working time for each stage of the continuous operation is also set according to the actual situation.

[0047] 3. Control the crane to operate intermittently for 60 minutes. This intermittent operation is performed according to the following schedule: 7 minutes of idling, 8 minutes of continuous operation, 7 minutes of idling, 8 minutes of continuous operation, and so on, repeating this cycle 4 times for a total of 60 minutes. The 7 minutes of idling means that the crane is in a non-working state and does not perform any work during these 7 minutes. After 7 minutes, it operates continuously for 8 minutes. The continuous operation process is the same as that in step 102 above and will not be repeated here. The actual working time for each stage of the continuous operation is also set according to the actual situation.

[0048] 4. Control the crane to operate intermittently for 60 minutes. This intermittent operation is performed according to the following schedule: 4 minutes of idling, 11 minutes of continuous operation, 1 minute of idling, 11 minutes of continuous operation, and so on, repeating this cycle 4 times for a total of 60 minutes. The 4 minutes of idling means that the crane is in a non-working state and does not perform any work during these 4 minutes. After 4 minutes, it operates continuously for 11 minutes. The continuous operation process is the same as that in step 102 above and will not be repeated here. The actual working time for each stage of the continuous operation is also set according to the actual situation.

[0049] 5. Control the crane to operate intermittently for 60 minutes. This intermittent operation is performed according to the following schedule: 3 minutes of idling, 12 minutes of continuous operation, 3 minutes of idling, 12 minutes of continuous operation, and so on, repeating this cycle 4 times for a total of 60 minutes. The 3 minutes of idling means that the crane is in a non-working state and does not perform any work during these 3 minutes. After this 3 minutes, it operates continuously for 12 minutes. The continuous operation process is the same as that in step 102 above and will not be repeated here. The actual working time for each stage of the continuous operation is also set according to the actual situation.

[0050] 6. Control the crane to operate intermittently for 60 minutes. This intermittent operation is performed according to the following schedule: 2 minutes of idling, 13 minutes of continuous operation, 2 minutes of idling, 13 minutes of continuous operation, and so on, repeating this cycle 4 times for a total of 60 minutes. The 2 minutes of idling means that during these 13 minutes, the crane is in a non-working state and will not perform any work. After 2 minutes, it operates continuously for another 13 minutes. The continuous operation process is the same as that in step 102 above and will not be repeated here. The actual working time for each stage of the continuous operation is also set according to the actual situation.

[0051] 104. After the first preset time of continuous operation and the second preset time of intermittent operation, determine whether the regeneration temperature of the DPF meets the preset conditions;

[0052] In this embodiment of the application, after the crane has undergone 30 minutes of continuous operation and 60 minutes of intermittent operation, the regeneration temperature of the crane's DPF is further checked to see if it meets the preset conditions. If yes, step 105 is executed. If no, step 106 is executed.

[0053] 105. Control the engine to perform the DPF regeneration test again.

[0054] In this embodiment of the application, after the engine is controlled to perform DPF regeneration test, the relevant parameters of vehicle speed, gear, engine speed, torque, main injection quantity, post-injection quantity, DOC inlet temperature, DPF inlet temperature and ECU are further collected, and DPF regeneration is verified and confirmed based on the relevant parameters.

[0055] 106. Adjust the control parameters and repeat the above test operation until the regeneration temperature of the DPF meets the preset conditions. Then, control the engine to perform the DPF regeneration test again.

[0056] This application allows for DPF regeneration testing of crane engines, which can verify and evaluate the regeneration effect of crane engine DPF. It has good representativeness and repeatability, and is highly operable, thus providing strong data support for making adaptive adjustments to the vehicle operating conditions of truck cranes. It effectively solves the problem of vehicles being unable to operate normally due to DPF overload and blockage, thereby improving the working efficiency of truck cranes.

[0057] Furthermore, this crane engine DPF regeneration test method is applicable to whole vehicle testing of engines equipped with DPF, such as cranes and truck-mounted cranes. It covers various regeneration conditions during vehicle operation and can be used in various environments such as plains, plateaus, and cold regions, exhibiting excellent operability and repeatability.

[0058] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0059] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only 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 coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0060] 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 network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0061] Furthermore, the functional units in the various embodiments of this application 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.

[0062] 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 this application, 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 this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

Claims

1. A method for testing the regenerative braking of a crane engine's DPF, characterized in that, The method includes: Control the start of the crane's engine; when it is determined that the engine's water temperature is greater than a preset temperature, control the engine to perform DPF regeneration. The crane is controlled to work continuously for a first preset time. The continuous work includes: sequentially performing loading and unloading operations without boom extension, slewing operations without boom extension, boom extension operations, boom swing operations, boom retraction operations, loading and unloading operations with maximum boom extension, and slewing operations with maximum boom extension. After the crane has worked continuously for the first preset time, the crane is controlled to repeat the second preset time cycle of idling, continuous operation, idling, and continuous operation. After a first preset time of continuous operation and a second preset time of repeating the cycle of idling, continuous operation, idling, and continuous operation, determine whether the regeneration temperature of the DPF meets the preset conditions. If so, control the engine to perform the DPF regeneration test again; If not, adjust the control parameters and repeat the above test operation until the DPF regeneration temperature meets the preset conditions, then control the engine to perform the DPF regeneration test again.

2. The method for testing the regenerative braking of a crane's engine DPF according to claim 1, characterized in that, When it is determined that the engine's water temperature is greater than a preset temperature, controlling the engine to perform DPF regeneration includes: When the engine water temperature is determined to be greater than 60°C, the engine is controlled to perform DPF regeneration.

3. The method for testing the regenerative braking of a crane's engine DPF according to claim 1, characterized in that, The control of the crane to operate continuously for a first preset time includes: Control the crane to work continuously for 30 minutes. The continuous work includes: sequentially performing loading operations without boom extension, slewing operations without boom extension, boom extension operations, boom swing operations, boom retraction operations, loading operations with maximum boom extension, and slewing operations with maximum boom extension.

4. The method for testing the regenerative braking of a crane's engine DPF according to claim 1, characterized in that, The second preset time for controlling the intermittent operation of the crane includes: The crane is controlled to work intermittently for 60 minutes, and the intermittent work for 60 minutes is carried out according to the following time: idling for 5 minutes, continuous work for 10 minutes, idling for 5 minutes, continuous work for 10 minutes, and so on, repeating the cycle 4 times to 60 minutes.

5. The method for testing the regenerative braking of a crane's engine DPF according to claim 4, characterized in that, After controlling the engine to perform the DPF regeneration test again, the method further includes: Collect relevant parameters such as vehicle speed, gear, engine speed, torque, main injection quantity, rear injection quantity, DOC inlet temperature, DPF inlet temperature, and ECU; DPF regeneration verification was performed based on the relevant parameters.

6. The method for testing the regenerative braking of a crane's engine DPF according to claim 1, characterized in that, The second preset time for controlling the intermittent operation of the crane includes: The crane is controlled to work intermittently for 60 minutes, and the intermittent work for 60 minutes is carried out according to the following time: 7 minutes of idling, 8 minutes of continuous work, 7 minutes of idling, 8 minutes of continuous work, and so on, repeating the cycle 4 times to 60 minutes.

7. The method for testing the regenerative braking of a crane's engine DPF according to claim 1, characterized in that, The second preset time for controlling the intermittent operation of the crane includes: The crane is controlled to work intermittently for 60 minutes, and the intermittent work for 60 minutes is carried out according to the following time: 3 minutes of idling, 12 minutes of continuous work, 3 minutes of idling, 12 minutes of continuous work, and so on, repeating the cycle 4 times to 60 minutes.

8. The method for testing the regenerative braking of a crane's engine DPF according to claim 1, characterized in that, The second preset time for controlling the intermittent operation of the crane includes: The crane is controlled to work intermittently for 60 minutes, and the intermittent work for 60 minutes is carried out according to the following time: 2 minutes of idling, 13 minutes of continuous work, 2 minutes of idling, 13 minutes of continuous work, and so on, repeating the cycle 4 times to 60 minutes.

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