Bench test diagnosis method, system and equipment for data acquisition

Abstract

The invention relates to the technical field of diesel engine testing, and discloses a bench test diagnosis method, system and equipment for data acquisition, and the method comprises the steps: recognizing whether engine test equipment is available or not based on a flag bit of the selected equipment; if yes, judging whether the engine test equipment, the test environment and the test state meet validity diagnosis conditions or not; if yes, based on a preset data acquisition strategy, data acquisition work of the engine is controlled according to diagnosis signals of different engine bench tests; otherwise, displaying test interruption according to the instrument, and sending an alarm signal which does not meet the required factors to the user side. According to the scheme, data validity automatic diagnosis can be realized, data acquisition results are evaluated in real time, the validity of data acquisition is improved, and the effective utilization rate of resources and time is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of diesel engine testing, in particular to a bench test diagnosis method, system and equipment for data acquisition. Background Art

[0002] In today's rapidly developing automotive industry, diesel engines, as a key power source, are crucial for performance optimization and development. Engine bench testing, a key step in diesel engine development, plays an irreplaceable role in obtaining accurate and valid test data. However, traditional manual test data collection methods are inefficient and costly. With the continuous advancement of automation technology, the adoption of automated testing methods has become an inevitable trend in the industry. Automated testing systems enable efficient collection of the vast amounts of data required for engine development, but this presents challenges in ensuring the effectiveness of data collection.

[0003] In diesel engine testing and development, data collection is fundamental to obtaining engine performance parameters and evaluating their performance. With the increasing complexity of diesel engine technology and the continuous improvement of R&D requirements, the amount of data required to be collected has exploded. To improve testing efficiency and reduce human resource costs, the industry has widely adopted automated testing methods. With their high efficiency and precision, automated testing systems can quickly and accurately collect various data required during engine development, such as fuel consumption, emissions, and combustion conditions. This data provides a critical basis for engine performance optimization, fault diagnosis, and new product development.

[0004] However, a significant problem with the current automated testing process is the near-total lack of real-time engineer intervention. Throughout the automated data collection process, the system operates automatically according to pre-set procedures, and engineers can only diagnose the validity of the collected data after it is complete. This post-hoc diagnostic approach has numerous drawbacks. Once a problem with data collection is discovered, the vast amount of data collected previously may be meaningless, wasting not only storage resources but also significant time. Problems with data collection necessitate retesting and re-collecting data, which undoubtedly prolongs the R&D cycle and increases R&D costs.

[0005] Therefore, the industry urgently needs a technology that can diagnose the validity of data in real time during the trial process to solve the above problems. Summary of the Invention

[0006] The present invention aims to provide a bench test diagnostic method, system, and electronic equipment for data acquisition, aiming to improve the effectiveness of data acquisition during automated diesel engine tests. The method can assess the effectiveness of data acquisition at any time during the test. When data acquisition fails to meet requirements, an alarm signal is immediately issued, and the test is promptly interrupted, preventing the continuation of invalid tests. This method not only improves the effectiveness of automated test data acquisition and reduces the generation of invalid data, but also significantly improves test accuracy and efficiency, reduces R&D costs, and promotes the rapid development of diesel engine R&D technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] In a first aspect, the present application provides a bench test diagnostic method for data acquisition, the method comprising:

[0009] Identify whether the engine test equipment is available based on the flag of the selected equipment;

[0010] If applicable, determine whether the engine test equipment, test environment and test status meet the validity diagnosis conditions;

[0011] If it meets the requirements, the engine data collection work is controlled based on the diagnostic signals of different engine bench tests based on the pre-established data collection strategy; otherwise, the test is interrupted according to the instrument display, and an alarm signal of unsatisfactory factors is sent to the user side.

[0012] Optionally, the identifying whether the engine test equipment is available based on the flag of the selected equipment includes:

[0013] When the selected device flag is 1, the test is carried out normally. When the device flag selected by the system is 0, the engine test equipment is unavailable.

[0014] The engine test equipment includes an engine bench, a fuel consumption meter, an air flow meter, an engine emission measuring instrument, a smoke meter, a combustion analyzer, a water thermostat, an air intake air conditioner and supply and exhaust air.

[0015] Optionally, determining whether the engine test equipment meets the validity diagnosis conditions includes:

[0016] The effectiveness of the engine test equipment, the test environment and the test state are respectively used as test conditions, and the effectiveness diagnosis of the engine test equipment, the test environment and the test state is performed in sequence;

[0017] Move the current engine to the baseline operating condition and determine the deviation between the parameters in the current state and the baseline values ​​of the baseline operating condition under different test conditions. If the deviation is greater than the predefined engineering target, the effectiveness diagnosis result is invalid.

[0018] When the validity diagnosis result of any one of the engine test equipment, test environment and test status is invalid, the test is terminated and the factors that do not meet the requirements are popped up; wherein, the factors include equipment factors, environmental factors and status factors.

[0019] Optionally, the engine test equipment effectiveness diagnosis includes: effectiveness diagnosis of the emission meter's measurement accuracy, measurement range, engine exhaust leakage status, fuel consumption meter's measurement accuracy, and smoke meter's measurement accuracy;

[0020] The effectiveness diagnosis of the engine test environment includes: effectiveness diagnosis of intake air temperature, intake air humidity and intake air pressure;

[0021] The test state validity diagnosis includes: engine fuel consumption, intake air volume, exhaust temperature, cylinder pressure and emission level, which can be used to measure the validity of engine state parameters.

[0022] Optionally, the deviation of the parameter in the current state from the reference value of the reference working condition is determined by the following formula:

[0023] η=(Kx-k) / k

[0024] Where Kx is the emission concentration EM_NOx of the emission instrument under the current NOx state; EM_NOx is the NOx emission amount of the emission instrument under the current state; and η is the deviation between the NOx emission concentration Kx of the emission instrument and the reference value k of the reference operating condition.

[0025] Optionally, the pre-established data collection strategy is formulated based on the availability status of different engine test equipment, and the effectiveness diagnosis results of the test equipment, test environment and test status, and is used to control the collection of data required during the engine development process.

[0026] In a second aspect, the present application provides a bench test diagnostic system for data acquisition, wherein the system is integrated into an engine bench and comprises:

[0027] an identification module for identifying whether the engine test equipment is available based on a flag bit of the selected equipment;

[0028] a judgment module, for judging, if applicable, whether the engine test equipment, the test environment, and the test status meet the validity diagnosis conditions;

[0029] The diagnostic module is used to control the engine data acquisition work based on the diagnostic signals of different engine bench tests if the engine test equipment, test environment and test status meet the validity diagnosis conditions. Otherwise, the test is interrupted according to the instrument display, and an alarm signal of non-compliance factors is sent to the user side.

[0030] Optionally, the identification module includes:

[0031] The identification unit is used to indicate that when the selected equipment flag is 1, the test is carried out normally, and when the equipment flag selected by the system is 0, the engine test equipment is unavailable; the engine test equipment includes an engine stand, a fuel consumption meter, an air flow meter, an engine emission measuring instrument, a smoke meter, a combustion analyzer, a water thermostat, an air intake air conditioner, and supply and exhaust air.

[0032] Optionally, the judgment module includes:

[0033] a validity diagnosis unit for sequentially performing validity diagnosis on the engine test equipment, the test environment, and the test state, respectively, using the validity of the engine test equipment, the test environment, and the test state as test conditions;

[0034] The comparison and judgment unit is used to move the current engine to the reference operating condition and judge the deviation between the parameters in the current state and the reference value of the reference operating condition under different test conditions. If the deviation is greater than the predefined engineering target, the effectiveness diagnosis result is invalid;

[0035] The test termination judgment unit is used to terminate the test when the validity diagnosis result of any one of the engine test equipment, test environment and test status is invalid, and pop up the factors that do not meet the requirements; wherein, the factors include equipment factors, environmental factors and status factors.

[0036] In a third aspect, the present application provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of any one of the methods described in the first aspect when executing the computer program.

[0037] The beneficial effects of the present invention are embodied in:

[0038] The aforementioned bench test diagnostic method, system, and device for data acquisition include identifying the availability of engine test equipment based on the selected equipment's flag; if so, determining whether the engine test equipment, as well as the test environment and test status, meet the validity diagnostic criteria; if so, controlling the engine's data acquisition based on diagnostic signals from different engine bench tests based on pre-established data acquisition strategies; otherwise, interrupting the test based on instrument display, and sending an alarm signal to the user indicating factors not meeting the requirements. This solution enables automated diagnosis of data validity and real-time evaluation of data acquisition results, improving the effectiveness of data acquisition and enhancing the efficient utilization of resources and time.

[0039] This invention, integrated and applied to an engine test bench, aims to address the challenge of diagnosing the effectiveness of data acquisition during engine test bench development. It can promptly diagnose the effectiveness of data acquisition and quickly issue an alarm signal when problems are identified, effectively resolving various issues that arise during the data acquisition process and significantly improving the effectiveness of test bench data output.

[0040] The bench test diagnosis method and system for data acquisition proposed by the present invention are particularly suitable for automated diagnosis of data validity during the automated data acquisition process of National VI diesel engines. They can perform real-time evaluation of data acquisition results, providing more reliable and efficient data support for diesel engine research and development. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0042] Figure 1 A flow chart of a bench test diagnostic method for data acquisition provided by the present invention;

[0043] Figure 2 A flow chart of a method for identifying whether an engine test device is available provided by the present invention;

[0044] Figure 3 A flow chart of the method for diagnosing the effectiveness of test equipment provided by the present invention;

[0045] Figure 4 A flow chart of the method for diagnosing the effectiveness of a test environment provided by the present invention;

[0046] Figure 5 A flow chart of the method for diagnosing the effectiveness of an engine state provided by the present invention;

[0047] Figure 6 A flow chart of a bench test diagnosis method for improving the effectiveness of diesel engine automated test data collection provided by the present invention;

[0048] Figure 7 This is a schematic diagram of the structure of the intelligent supercharging system for LNG commercial vehicles based on high-precision maps provided by the present invention;

[0049] Figure 8 This is a structural diagram of a computer device provided by the present invention. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0051] To overcome the shortcomings of existing technologies, the present invention provides a bench test diagnostic method for data acquisition, primarily for use in vehicle-mounted equipment. This method can be applied to a terminal, a server, or a complete vehicle system comprising a terminal and a server, and implemented through interaction between the terminal and the server. The terminal may be, but is not limited to, various personal computers, laptops, smartphones, tablet computers, and the like.

[0052] The following embodiment takes the car end as an example to elaborate on the design process of the method. Figure 1 In one embodiment, the present invention provides a bench test diagnostic method for data acquisition, the method comprising:

[0053] S1 identifies whether the engine test equipment is available based on the flag of the selected equipment;

[0054] S2, if applicable, determines whether the engine test equipment, test environment, and test status meet the validity diagnosis conditions;

[0055] If S3 meets the requirements, the engine data collection work is controlled based on the pre-established data collection strategy and the diagnostic signals of different engine bench tests; otherwise, the test is interrupted according to the instrument display, and an alarm signal of unsatisfactory factors is sent to the user side.

[0056] In the above embodiment, step S1 of identifying whether the engine test equipment is available based on the flag of the selected equipment includes:

[0057] When the selected device flag is 1, the test is carried out normally. When the device flag selected by the system is 0, the engine test equipment is unavailable.

[0058] The engine test equipment includes an engine bench, a fuel consumption meter, an air flow meter, an engine emission measuring instrument, a smoke meter, a combustion analyzer, a water thermostat, an air intake air conditioner and supply and exhaust air.

[0059] In the above embodiment, step S2 of determining whether the engine test equipment meets the validity diagnosis conditions includes:

[0060] The effectiveness of the engine test equipment, the test environment and the test state are respectively used as test conditions, and the effectiveness diagnosis of the engine test equipment, the test environment and the test state is performed in sequence;

[0061] Move the current engine to the baseline operating condition and determine the deviation between the parameters in the current state and the baseline values ​​of the baseline operating condition under different test conditions. If the deviation is greater than the predefined engineering target, the effectiveness diagnosis result is invalid.

[0062] When the validity diagnosis result of any one of the engine test equipment, test environment and test status is invalid, the test is terminated and the factors that do not meet the requirements are popped up; wherein, the factors include equipment factors, environmental factors and status factors.

[0063] In the above embodiment, the effectiveness diagnosis of the engine test equipment includes: effectiveness diagnosis of the measurement accuracy, measurement range, engine exhaust leakage status, fuel consumption meter measurement accuracy, and smoke meter measurement accuracy of the emission meter;

[0064] The effectiveness diagnosis of the engine test environment includes: effectiveness diagnosis of intake air temperature, intake air humidity and intake air pressure;

[0065] The test state validity diagnosis includes: engine fuel consumption, intake air volume, exhaust temperature, cylinder pressure and emission level, which can be used to measure the validity of engine state parameters.

[0066] Optionally, in step S2 of the above embodiment, the deviation between the parameter in the current state and the reference value of the reference working condition is determined by the following formula:

[0067] η=(Kx-k) / k

[0068] Where Kx is the emission concentration EM_NOx of the emission instrument under the current NOx state; EM_NOx is the NOx emission amount of the emission instrument under the current state; and η is the deviation between the NOx emission concentration Kx of the emission instrument and the reference value k of the reference operating condition.

[0069] In order to achieve the purpose of improving the effectiveness of diesel engine automated test data collection, the present invention proposes a practical application embodiment 1 based on the concept of the above steps S1 to S2. This embodiment 1 adopts a complete and scientific technical solution, specifically including the following steps:

[0070] S101 diagnosis of test equipment availability;

[0071] Diagnostic Purpose: This system accurately diagnoses the availability of engine test equipment, particularly those required for China VI diesel engine testing. This equipment availability diagnosis ensures that all equipment used during testing is in working order, preventing invalid test data due to equipment failure.

[0072] Before the test, it is necessary to carefully select the equipment required for the test according to the specific test requirements. Common equipment includes a fuel consumption meter that maintains engine operation, which can accurately measure the fuel consumption of the engine under different operating conditions and provide key data for the engine's fuel economy evaluation; engine emission measurement equipment, which is used to monitor the various emission indicators of the engine in real time to ensure that the engine meets environmental protection requirements; engine combustion state equipment, which can deeply analyze the combustion process inside the engine and provide a basis for optimizing the engine's combustion performance. In addition, engine test equipment can also include engine stands, air flow meters, smoke meters, combustion analyzers, water thermostats, intake air conditioners, supply and exhaust fans, etc. The selection of specific equipment should be based on the actual test needs and is not limited to the equipment listed above.

[0073] Equipment Availability Determination: When the equipment is available, the test system accurately identifies it and sets the selected equipment flag to 1, allowing the test to proceed normally. Conversely, when the equipment flag is 0, the test equipment is unavailable and the test cannot proceed. In this case, the system automatically displays a dialog box, notifying the tester that the test cannot proceed or has been interrupted due to an equipment problem, allowing the tester to promptly perform maintenance and repairs on the equipment.

[0074] S102 Diagnosis of the effectiveness of test equipment;

[0075] Diagnostic Purpose: Before or during a test, even if the measuring equipment is in a usable state, it is necessary to conduct an in-depth diagnosis of its measurement validity. The validity of the measuring equipment is directly related to the accuracy and reliability of the collected data. Therefore, ensuring the validity of the measuring equipment is a key step in improving the quality of data collection.

[0076] Effectiveness diagnosis content: Effectiveness diagnosis covers multiple aspects, including the measurement accuracy of the emission meter, which determines the accuracy of the engine emission index data; the engine exhaust leakage status, exhaust leakage will affect the engine performance and emission data, so it needs to be strictly monitored; the measurement accuracy of the fuel consumption meter, accurate fuel consumption data is crucial for evaluating the fuel economy of the engine; the measurement accuracy of the smoke meter, smoke density is one of the important indicators for measuring engine emission quality, and its measurement accuracy directly affects the evaluation of engine emission performance, etc.

[0077] Diagnostic method: The effectiveness diagnosis of the test equipment is carried out on the basis of the equipment being available.

[0078] During the test, it is first necessary to find a baseline operating condition. Generally, the rated speed N and rated torque T are used as the baseline operating condition. In the system of the present invention, the baseline values ​​of all equipment under this operating condition are defined. For example, the baseline value of the NOx emission of the emission meter is EM_NOX = kppm; the baseline value of the smoke emission of the smoke meter is S415 = s FSN; the baseline value of the fuel temperature of the fuel consumption meter is T = t1°C, etc. The specific method of effectiveness diagnosis is: taking the NOx emission of the emission meter as an example, the current engine is operated to the baseline operating condition, and then the deviation of the EM_NOx concentration kx in the current state and the baseline value k of the baseline operating condition is evaluated. The deviation calculation formula is: η = (Kx-k) / k. When the deviation η ≤ η0 (η0 is the engineering target value), it indicates that the measurement validity of the test equipment on this parameter is valid, and a2 = 1; otherwise, a2 = 0, that is, the measurement validity is invalid. Similarly, similar diagnosis and judgment are performed on other parameters. For example, the current engine is moved to the baseline operating condition, and the deviation of other parameters in the current state from the baseline operating condition is examined. If the deviation is greater than the engineering target, the corresponding validity flag is 0; otherwise, it is 1. When the validity flags of all key parameters meet the conditions (such as a2 = 1, b2 = 1, c2 = 1, etc.), A2 = 1, indicating that the test equipment validity conditions are met, and the test diagnosis proceeds to the next step.

[0079] S103 diagnosis of the effectiveness of the engine test environment;

[0080] Diagnostic Purpose: The effectiveness of the engine test environment significantly impacts the accuracy and reliability of test data. Different test environment parameters can have varying effects on engine performance. Therefore, before and during testing, it is necessary to accurately diagnose whether the test environment meets the requirements and ensure that the test is conducted under appropriate environmental conditions.

[0081] Environmental effectiveness parameters: Environmental effectiveness mainly includes parameters such as intake temperature, intake humidity, and intake pressure. Changes in these parameters will directly affect the engine's intake volume and combustion process, and thus affect the engine's performance and emissions data.

[0082] Diagnostic Method: During the test, the system monitors and diagnoses these environmental parameters in real time. For example, when the intake air temperature Tair∈(22,28), a3=1, indicating that the intake air temperature meets the test requirements; otherwise, a3=0, indicating that the intake air temperature is abnormal. Similarly, when the intake air humidity PHI∈(40,60), b3=1, otherwise b3=0; when the intake air pressure Pair∈(95,105), c3=1, otherwise c3=0. When the validity flags of all key environmental parameters meet the conditions (e.g., a3=1, b3=1, c3=1, etc.), A3=1, indicating that the test environment validity conditions are met, and the test diagnosis proceeds to the next step. If any environmental parameter does not meet the requirements, the system will automatically pop up a dialog box to inform the tester that the test cannot be carried out or the test has been interrupted due to a certain environmental factor, so that the test environment can be adjusted in a timely manner.

[0083] S104 diagnoses the effectiveness of engine test status;

[0084] Diagnostic Purpose: Engine testing requires a normal engine condition. The engine condition directly impacts the accuracy and reliability of test data. Therefore, before and during testing, a comprehensive diagnosis of the engine's condition is necessary to ensure it is in good condition for testing.

[0085] Engine status parameters: These include fuel consumption, intake air volume, exhaust temperature, cylinder pressure, and emission levels. These parameters intuitively reflect the engine's operating condition and performance. Monitoring and diagnosing these parameters can help identify engine problems and prevent test data from being invalidated due to abnormal engine status.

[0086] Diagnostic Method: During the test process, a benchmark operating condition is also required. Typically, the rated speed N and rated torque T are used as the benchmark conditions. In the system of the present invention, benchmark values ​​for all equipment under this operating condition are defined. For example, the benchmark value for fuel consumption is FB_VAL = fkg / h; the benchmark value for air volume is AIRCOIN = ai kg / h; the benchmark value for intake pressure is P_IC_O = p kPa; and the benchmark value for intake temperature is T_IC_O = t°C. The specific method for diagnosing effectiveness is as follows: Taking fuel consumption as an example, the current engine is operated at the benchmark operating condition and the deviation between the current fuel consumption and the baseline value under the benchmark operating condition is evaluated. If the deviation exceeds the engineering target, the effectiveness of the test equipment for that parameter is invalid, and a4 = 0; otherwise, a4 = 1, indicating effectiveness. Similarly, similar diagnostics and judgments are performed for other parameters. For example, the current engine is operated at the benchmark operating condition and the deviation between the current parameters and the baseline values ​​under the benchmark operating condition is evaluated. If the deviation exceeds the engineering target, the corresponding effectiveness flag is set to 0; otherwise, it is set to 1. When the validity flags of all key engine status parameters meet the conditions (such as a4=1, b4=1, c4=1, d4=1, etc.), A4=1, that is, the validity diagnosis of the engine test status meets the conditions.

[0087] After completing the diagnostics in steps S1-S4, the system will conduct a comprehensive assessment of the test conditions. The test can proceed only when A1 = 1, A2 = 1, A3 = 1, and A4 = 1—that is, when all test conditions are met (A = A1 & A2 & A3 & A4 = 1). Otherwise, if any of these conditions are not met, the test will be interrupted, and the system will automatically notify the tester of the specific problem, allowing for prompt investigation and correction. This rigorous comprehensive assessment mechanism ensures that the test is conducted under optimal conditions, effectively improving the effectiveness of diesel engine automated test data collection.

[0088] In one embodiment, in step S3 of the above embodiment, the pre-established data collection strategy is formulated based on the availability status of different engine test equipment, as well as the effectiveness diagnosis results of the test equipment, test environment and test status, and is used to control the collection of data required during the engine development process.

[0089] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0090] Based on the above specific implementation schemes, this application provides the following examples.

[0091] The above embodiments of the present invention provide a bench test diagnostic method for data acquisition, and the following embodiment 2 is provided:

[0092] Taking the development of a heavy-duty diesel engine as an example, the engine undergoes bench automated testing. During the test, the bench test diagnostic system proposed in this invention to improve the effectiveness of diesel engine automated test data collection will be fully applied to perform effectiveness diagnosis on the test equipment, test environment, and engine status to ensure the accuracy and reliability of the test data. Figures 2 to 5 As shown, the above-mentioned figures are flow charts of the bench test diagnosis of the present invention for verifying a method for improving the effectiveness of diesel engine automated test data collection. These flow charts detail the various diagnostic steps and their logical relationships of the system of the present invention, starting with the test equipment availability diagnosis, and then proceeding through the test equipment effectiveness diagnosis, the engine test environment effectiveness diagnosis, and the engine test status effectiveness diagnosis, ultimately making a comprehensive judgment on the test conditions. Through these flow charts, one can intuitively understand the workflow and diagnostic methods of the system of the present invention, making it easier for technicians to understand and implement. The specific implementation process is as follows:

[0093] S11: Diagnosis of test equipment availability;

[0094] Equipment selection and flag setting: According to the requirements of the implementation case, a heavy-duty diesel engine is bench tested. The equipment required includes: a1 fuel consumption meter, whose flag a1=1 when available and a1=0 when unavailable; b1 gas emission analyzer, whose flag b1=1 when available and b1=0 when unavailable; c1 steady-state smoke meter, whose flag c1=1 when available and c1=0 when unavailable; d1 air flow meter, whose flag d1=1 when available and d1=0 when unavailable; e1 water thermostat, whose flag e1=1 when available and e1=0 when unavailable. All the equipment used has been connected to the bench system, and their availability status has been called by the bench test diagnosis system for improving the effectiveness of diesel engine automated test data collection of the present invention.

[0095] Equipment Availability Determination: After debugging, all systems meet measurement conditions. After system diagnosis, if the test equipment is available, A = 1; otherwise, A = 0. The diagnostic system will only proceed to the next step when A = 1. For example, when a1 = 1, b1 = 1, c1 = 1, d1 = 1, and e1 = 1, A1 = 1 indicates that the equipment meets availability conditions and the test can continue.

[0096] Furthermore, the test equipment is not limited to the equipment listed in this embodiment, and any equipment used in the test process is included in the protection scope of the present invention.

[0097] S12 Diagnosis of the effectiveness of test equipment;

[0098] Setting a baseline operating condition and defining baseline values: During testing, a baseline operating condition is identified, typically the rated speed N and rated torque T. In this invention, baseline values ​​for all equipment under this operating condition are defined. For example, the baseline value for NOx emissions from an emissions meter is EM_NOX = kppm; the baseline value for smoke emissions from a smoke meter is S415 = s FSN; and the baseline value for fuel temperature from a fuel consumption meter is T = t1°C.

[0099] Validity diagnosis process: Taking the NOx emissions tester as an example, the current engine is run to the baseline operating condition. The deviation of the EM_NOx concentration kx under the current condition from the baseline operating condition's reference value k is then evaluated. The deviation is calculated as: η = (Kx - k) / k. When η ≤ η0 (η0 is the engineering target value), a2 = 1, indicating that the test equipment's measurement validity for that parameter is valid; otherwise, a2 = 0, indicating that the measurement validity is invalid. Similar diagnostics and judgments are performed for other parameters. For example, the current engine is run to the baseline operating condition. The deviation of the smoke meter's smoke emission S415 under the current condition from the baseline operating condition's reference value s is evaluated. If the deviation is less than the engineering target, b2 = 1; otherwise, b2 = 0. The deviation of the fuel temperature T of the fuel consumption meter from the baseline operating condition's reference value t1 is evaluated. If the deviation is less than the engineering target, c2 = 1; otherwise, c2 = 0. When the validity flags of all key parameters meet the conditions (such as a2=1, b2=1, c2=1, etc.), A2=1, that is, the validity of the test equipment meets the conditions, and the test diagnosis enters the next step.

[0100] S13 diagnosis of the effectiveness of the engine test environment;

[0101] Environmental parameter diagnostic standard setting: This system diagnoses the effectiveness of the engine test environment, focusing on parameters such as intake air temperature, intake air humidity, and intake air pressure. The effective range of intake air temperature (Tair) is set to (22, 28). When Tair∈(22, 28), a3=1; otherwise, a3=0. The effective range of intake air humidity (PHI) is set to (40, 60). When PHI∈(40, 60), b3=1; otherwise, b3=0. The effective range of intake air pressure (Pair) is set to (95, 105). When Pair∈(95, 105), c3=1; otherwise, c3=0.

[0102] Environmental Validity Assessment: During the test, the system monitors these environmental parameters in real time. When the validity flags for all key environmental parameters meet the requirements (e.g., a3 = 1, b3 = 1, c3 = 1, etc.), A3 = 1, indicating that the test environment is valid, and the test diagnosis proceeds to the next step. If any environmental parameter does not meet the requirements, the system will automatically prompt a dialog box to inform the tester that the test cannot be carried out or has been interrupted due to a certain environmental factor, so that the test environment can be adjusted in a timely manner.

[0103] S14 effectiveness diagnosis of engine test status

[0104] Baseline operating condition setting and baseline value definition: During the test, rated speed N and rated torque T are also used as the baseline operating condition. In the system of the present invention, baseline values ​​for all equipment under this operating condition are defined. For example, the baseline value for fuel consumption is FB_VAL = fkg / h; the baseline value for air volume is AIRCOIN = ai kg / h; the baseline value for intake pressure is P_IC_O = pkPa; the baseline value for intake temperature is T_IC_O = t°C, etc.

[0105] Validity diagnosis process: Taking fuel consumption as an example, the current engine is run to the baseline operating condition and the deviation between the current fuel consumption and the baseline value is measured. If the deviation is greater than the engineering target, the test equipment's validity for that parameter is invalid, and a4 = 0; otherwise, a4 = 1, indicating validity. Similar diagnostics and judgments are performed for other parameters. For example, the current engine is run to the baseline operating condition and the deviation between the current air volume AIRCOIN and the baseline value ai is measured. If the deviation is greater than the engineering target, b4 = 0; otherwise, b4 = 1. The deviation between the current intake pressure P_IC_O and the baseline value p is measured. If the deviation is greater than the engineering target, c4 = 0; otherwise, c4 = 1. The deviation between the current intake temperature T_IC_O and the baseline value t is measured. If the deviation is greater than the engineering target, d4 = 0; otherwise, d4 = 1. When the validity flags of all key engine status parameters meet the conditions (such as a4=1, b4=1, c4=1, d4=1, etc.), A4=1, that is, the validity diagnosis of the engine test status meets the conditions.

[0106] After completing the diagnostics in steps S11-S14, the system conducts a comprehensive assessment of the test conditions. The test can proceed only when A1 = 1, A2 = 1, A3 = 1, and A4 = 1—that is, when all test conditions are met (A = A1 & A2 & A3 & A4 = 1). Otherwise, if any of these conditions are not met, the test is interrupted, and the system automatically prompts the tester with the specific problem, allowing for prompt troubleshooting and correction. This rigorous comprehensive assessment mechanism ensures that the test is conducted under optimal conditions, effectively improving the effectiveness of diesel engine automated test data collection.

[0107] Based on the same inventive concept, embodiments of the present application further provide a bench test diagnostic system for data acquisition, which is used to implement the aforementioned bench test diagnostic method for data acquisition. The solution provided by this system is similar to the solution described in the aforementioned method. Therefore, the specific limitations of one or more embodiments of the bench test diagnostic system for data acquisition provided below can be found in the above-mentioned limitations of the bench test diagnostic method for data acquisition, and will not be repeated here.

[0108] In one embodiment, a bench test diagnostic system for data acquisition is provided, such as Figure 7 As shown in the communication principle diagram, the system is integrated into the engine rig and includes an identification module 210, a judgment module 220 and a diagnosis module 230, wherein:

[0109] An identification module 210 is used to identify whether the engine test equipment is available based on the flag of the selected equipment;

[0110] A determination module 220 is configured to determine, if applicable, whether the engine test equipment, the test environment, and the test status meet the validity diagnosis conditions;

[0111] The diagnostic module 230 is used to control the engine data acquisition work based on the diagnostic signals of different engine bench tests if the engine test equipment, test environment and test status meet the validity diagnosis conditions. Otherwise, the test is interrupted according to the instrument display, and an alarm signal of non-compliance factors is sent to the user side.

[0112] The identification module 210 includes:

[0113] The identification unit is used to indicate that when the selected equipment flag is 1, the test is carried out normally, and when the equipment flag selected by the system is 0, the engine test equipment is unavailable; the engine test equipment includes an engine stand, a fuel consumption meter, an air flow meter, an engine emission measuring instrument, a smoke meter, a combustion analyzer, a water thermostat, an air intake air conditioner, and supply and exhaust air.

[0114] The judgment module 220 includes:

[0115] a validity diagnosis unit for sequentially performing validity diagnosis on the engine test equipment, the test environment, and the test state, respectively, using the validity of the engine test equipment, the test environment, and the test state as test conditions;

[0116] The comparison and judgment unit is used to move the current engine to the reference operating condition and judge the deviation between the parameters in the current state and the reference value of the reference operating condition under different test conditions. If the deviation is greater than the predefined engineering target, the effectiveness diagnosis result is invalid;

[0117] The test termination judgment unit is used to terminate the test when the validity diagnosis result of any one of the engine test equipment, test environment and test status is invalid, and pop up the factors that do not meet the requirements; wherein, the factors include equipment factors, environmental factors and status factors.

[0118] In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as follows: Figure 8As shown. The computer device includes a processor, a memory, a communication interface, a display screen and an input device connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a bench test diagnostic method for data acquisition is implemented.

[0119] Those skilled in the art will understand that Figure 8 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0120] It should be noted that the various technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0121] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A bench test diagnostic method for data acquisition, characterized in that: The method comprises: Identify whether the engine test equipment is available based on the flag of the selected equipment; If applicable, determine whether the engine test equipment, test environment and test status meet the validity diagnosis conditions; If it meets the requirements, the engine data collection work is controlled based on the diagnostic signals of different engine bench tests based on the pre-established data collection strategy; otherwise, the test is interrupted according to the instrument display, and an alarm signal of unsatisfactory factors is sent to the user side.

2. The method according to claim 1, wherein The identifying whether the engine test equipment is available based on the flag of the selected equipment includes: When the selected device flag is 1, the test is carried out normally. When the device flag selected by the system is 0, the engine test equipment is unavailable. The engine test equipment includes an engine bench, a fuel consumption meter, an air flow meter, an engine emission measuring instrument, a smoke meter, a combustion analyzer, a water thermostat, an air intake air conditioner and supply and exhaust air.

3. The method according to claim 1, wherein The determination of whether the engine test equipment meets the validity diagnosis conditions includes: The effectiveness of the engine test equipment, the test environment and the test state are respectively used as test conditions, and the effectiveness diagnosis of the engine test equipment, the test environment and the test state is performed in sequence; Move the current engine to the baseline operating condition and determine the deviation between the parameters in the current state and the baseline values ​​of the baseline operating condition under different test conditions. If the deviation is greater than the predefined engineering target, the effectiveness diagnosis result is invalid. When the validity diagnosis result of any one of the engine test equipment, test environment and test status is invalid, the test is terminated and the factors that do not meet the requirements are popped up; wherein, the factors include equipment factors, environmental factors and status factors.

4. The method according to claim 3, wherein The effectiveness diagnosis of the engine test equipment includes: effectiveness diagnosis of the measurement accuracy and measurement range of the emission meter, the engine exhaust leakage status, the measurement accuracy of the fuel consumption meter and the measurement accuracy of the smoke meter; The effectiveness diagnosis of the engine test environment includes: effectiveness diagnosis of intake air temperature, intake air humidity and intake air pressure; The test state validity diagnosis includes: engine fuel consumption, intake air volume, exhaust temperature, cylinder pressure and emission level, which can be used to measure the validity of engine state parameters.

5. The method according to claim 3, wherein The deviation between the parameter in the current state and the reference value of the reference working condition is determined by the following formula: η=(Kx-k) / k Where Kx is the emission concentration EM_NOx of the emission instrument under the current NOx state; EM_NOx is the NOx emission amount of the emission instrument under the current state; and η is the deviation between the NOx emission concentration Kx of the emission instrument and the reference value k of the reference operating condition.

6. The method according to claim 1, wherein The pre-established data collection strategy is formulated based on the availability status of different engine test equipment, as well as the effectiveness diagnosis results of the test equipment, test environment and test status, and is used to control the collection of data required during the engine development process.

7. A bench test diagnostic system for data acquisition, characterized in that: The system is integrated into the engine rig and includes: an identification module for identifying whether the engine test equipment is available based on a flag bit of the selected equipment; a judgment module, for judging, if applicable, whether the engine test equipment, the test environment, and the test status meet the validity diagnosis conditions; The diagnostic module is used to control the engine data acquisition work based on the diagnostic signals of different engine bench tests if the engine test equipment, test environment and test status meet the validity diagnosis conditions. Otherwise, the test is interrupted according to the instrument display, and an alarm signal of non-compliance factors is sent to the user side.

8. The system according to claim 7, wherein: The identification module includes: The identification unit is used to indicate that when the selected equipment flag is 1, the test is carried out normally, and when the equipment flag selected by the system is 0, the engine test equipment is unavailable; the engine test equipment includes an engine stand, a fuel consumption meter, an air flow meter, an engine emission measuring instrument, a smoke meter, a combustion analyzer, a water thermostat, an air intake air conditioner, and supply and exhaust air.

9. The system according to claim 7, wherein: The judgment module includes: a validity diagnosis unit for sequentially performing validity diagnosis on the engine test equipment, the test environment, and the test state, respectively, using the validity of the engine test equipment, the test environment, and the test state as test conditions; The comparison and judgment unit is used to move the current engine to the reference operating condition and judge the deviation between the parameters in the current state and the reference value of the reference operating condition under different test conditions. If the deviation is greater than the predefined engineering target, the effectiveness diagnosis result is invalid; The test termination judgment unit is used to terminate the test when the validity diagnosis result of any one of the engine test equipment, test environment and test status is invalid, and pop up the factors that do not meet the requirements; wherein, the factors include equipment factors, environmental factors and status factors.

10. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 8 are implemented.

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