CN111289252A - Bench test method, device, computer equipment and storage medium - Google Patents
Bench test method, device, computer equipment and storage medium Download PDFInfo
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- CN111289252A CN111289252A CN201811485604.4A CN201811485604A CN111289252A CN 111289252 A CN111289252 A CN 111289252A CN 201811485604 A CN201811485604 A CN 201811485604A CN 111289252 A CN111289252 A CN 111289252A
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- G01M15/00—Testing of engines
Abstract
The application relates to a bench test method, a bench test device, computer equipment and a storage medium. The computer equipment adjusts the running state of the engine according to the acquired testing boundary conditions of the engine, and then performs bench testing on the engine according to the adjusted running state of the engine. In the embodiment, the test boundary condition of the engine comprises the target value of the running parameter to be tested of the engine and/or the adjustment rule of the critical condition to be tested, so that the running state of the engine can be automatically adjusted by the computer equipment according to the test boundary condition, and the engine is automatically subjected to bench test according to the program after the running state of the engine is adjusted, so that manual debugging and judgment are not needed in the whole process, and the test efficiency and the precision of the test result are greatly improved.
Description
Technical Field
The present disclosure relates to the field of bench testing technologies, and in particular, to a bench testing method, an apparatus, a computer device, and a storage medium.
Background
The engine bench test is an important ring in the engine development stage, and is used for not only checking the reliability of the whole engine and related parts, but also verifying whether the performance of the engine reaches the initial design index, so that a large number of bench tests cannot be carried out before the engine is successfully produced in mass.
At present, a common bench test is mainly a manual test, a tester needs to manually debug an engine operating condition point, and then the performance of the engine is measured according to test boundary conditions such as the engine speed, the engine load, an air inlet/outlet valve, an air-fuel ratio and an ignition angle.
Therefore, the manual rack test mode has the technical problems of low working efficiency, high labor intensity of workers and low measurement precision.
Disclosure of Invention
Therefore, it is necessary to provide a bench test method, an apparatus, a computer device and a storage medium for solving the technical problems of low working efficiency, high labor intensity of workers and low measurement accuracy in the manual bench test mode.
In a first aspect, an embodiment of the present invention provides a bench test method, where the method includes:
acquiring a test boundary condition of the engine; the test boundary condition comprises a target value of the running parameter to be tested of the engine and/or an adjustment rule of a critical condition to be tested;
adjusting the running state of the engine according to the testing boundary condition of the engine;
and carrying out bench test on the engine according to the adjusted running state of the engine.
In one embodiment, the obtaining the test boundary condition of the engine includes:
acquiring a rotating speed target value and a load target value of the engine in the test working condition table;
the adjusting the operating state of the engine according to the test boundary condition of the engine comprises:
and adjusting the real-time rotating speed and the load of the engine to the target value according to the target value of the rotating speed and the target value of the load of the engine respectively.
In one embodiment, the obtaining the test boundary condition of the engine includes:
acquiring an adjustment rule of an air-fuel ratio and an ignition angle of the engine; the regulation rule comprises the exhaust temperature quantity, the exhaust temperature limit value, the combustion knock state and the combustion phase of the engine;
the adjusting the operating state of the engine according to the test boundary condition of the engine comprises:
and respectively adjusting the air-fuel ratio and the ignition angle of the engine according to the adjustment rule.
In one embodiment, the adjusting the air-fuel ratio and the ignition angle of the engine according to the adjustment rule respectively includes:
if the exhaust temperature of the engine is lower than the exhaust temperature limit value, adjusting the air-fuel ratio of the engine to be an equivalent air-fuel ratio;
and if the exhaust temperature of the engine is higher than the exhaust temperature limit value, adjusting the air-fuel ratio to be the air-fuel ratio corresponding to the exhaust temperature limit value.
In one embodiment, the adjusting the air-fuel ratio and the ignition angle of the engine according to the adjustment rule respectively includes:
if the combustion knock state is non-knock, adjusting the ignition angle to a target value of the combustion phase;
and if the combustion knock state is knock, adjusting the ignition angle to a combustion phase value corresponding to a knock edge.
In one embodiment, the method further comprises:
acquiring a detonation probability distribution value output by a combustion analyzer;
and determining the combustion knock state according to the knock probability distribution value.
In one embodiment, the knock probability distribution values are a distribution of times that a knock signal exceeds a threshold value within a preset number of cycles at different engine speeds.
In a second aspect, an embodiment of the present invention provides a bench test apparatus, including:
the first acquisition module is used for acquiring a test boundary condition of the engine; the test boundary condition comprises a target value of the running parameter to be tested of the engine and/or an adjustment rule of a critical condition to be tested;
the adjusting module is used for adjusting the running state of the engine according to the testing boundary condition of the engine;
and the test module is used for carrying out bench test on the engine according to the adjusted running state of the engine.
In a third aspect, an embodiment of the present invention provides a computer device, including a memory and a processor, where the memory stores a computer program, and the processor implements the following steps when executing the computer program:
acquiring a test boundary condition of the engine; the test boundary condition comprises a target value of the running parameter to be tested of the engine and/or an adjustment rule of a critical condition to be tested;
adjusting the running state of the engine according to the testing boundary condition of the engine;
and carrying out bench test on the engine according to the adjusted running state of the engine.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the following steps:
acquiring a test boundary condition of the engine; the test boundary condition comprises a target value of the running parameter to be tested of the engine and/or an adjustment rule of a critical condition to be tested;
adjusting the running state of the engine according to the testing boundary condition of the engine;
and carrying out bench test on the engine according to the adjusted running state of the engine.
According to the bench test method, the bench test device, the computer equipment and the storage medium, the computer equipment adjusts the running state of the engine through the obtained test boundary condition of the engine, and then bench test is conducted on the engine according to the adjusted running state of the engine. In the embodiment, the test boundary condition of the engine comprises the target value of the running parameter to be tested of the engine and/or the adjustment rule of the critical condition to be tested, so that the running state of the engine can be automatically adjusted by the computer equipment according to the test boundary condition, and the engine is automatically subjected to bench test according to the program after the running state of the engine is adjusted, so that manual debugging and judgment are not needed in the whole process, and the test efficiency and the precision of the test result are greatly improved.
Drawings
FIG. 1 is a diagram of an application environment of a bench test method according to an embodiment;
FIG. 2 is a flow chart illustrating a method for bench testing according to one embodiment;
FIG. 2.1 is a flow chart of a method for bench testing according to one embodiment;
FIG. 3 is a flow diagram of a method for bench testing according to one embodiment;
FIG. 3.1 illustrates a schematic flow chart for adjusting air-fuel ratio of an engine according to one embodiment;
FIG. 4 is a flow chart illustrating a method for bench testing according to one embodiment;
FIG. 4.1 is a schematic flow chart of adjusting the firing angle of an engine according to one embodiment;
FIG. 5 is a flow chart illustrating a method for bench testing according to one embodiment;
FIG. 6 is a block diagram of a bench test apparatus according to an embodiment;
FIG. 7 is a block diagram of a bench test apparatus according to an embodiment;
FIG. 8 is a diagram illustrating an internal structure of a computer device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The rack test method provided by the application can be applied to an automatic test system shown in fig. 1, and the automatic test system comprises: the fuel cell system comprises computer equipment 1, computer equipment 8, a combustion analyzer 2, a communication tool 3, an engine stand 4, a cylinder pressure sensor 5, an engine 6 and a calibration Electronic Control Unit (ECU) 7, wherein the communication tool 3 CAN be ES581 Controller Area Network (CAN) bus communication, and CAN realize communication among the computer equipment 1, the computer equipment 8 and the engine stand 4. The engine bench 4 may be a PUMA bench or other benches, which is not limited in this embodiment. The computer device 1 is provided with combustion analysis software, the computer device 8 is provided with automatic test software and calibration software INCA, and the computer device 1 is used for receiving a knock signal sent by the combustion analyzer 2, wherein data interaction is carried out between the combustion analyzer 2 and the cylinder pressure sensor 5, and the cylinder pressure sensor 5 is used for monitoring the knock condition of the engine 6. Therein, the calibration ECU7 may communicate with the calibration software INCA and the engine 6 for controlling the engine 6 in accordance with the instructions sent by the calibration software INCA.
The embodiment of the application provides a rack testing method, a rack testing device, computer equipment and a storage medium, and aims to solve the technical problems of low working efficiency, high labor intensity of workers and low measurement precision in a manual rack testing mode. The bench test method provided by the embodiment of the application can automatically complete the whole bench test of the engine, and the technical problem is avoided. The following describes in detail the technical solutions of the present application and how the technical solutions of the present application solve the above technical problems by embodiments and with reference to the drawings. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. It should be noted that, in the bench test method provided in the present application, the execution subject is a computer device, wherein the execution subject may also be a bench test apparatus, and the apparatus may be implemented as part or all of a data analysis terminal by software, hardware, or a combination of software and hardware.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
FIG. 2 is a flow chart of a bench test method, which relates to a specific process of bench testing an engine after a computer device adjusts the running state of the engine according to the test boundary conditions of the engine. As shown in fig. 2, the method includes:
s101, obtaining a test boundary condition of the engine; the test boundary conditions comprise target values of the engine to-be-tested operation parameters and/or adjustment rules of to-be-tested critical conditions.
In this embodiment, the test boundary condition represents a standard according to which the computer device adjusts the engine operating parameter, and the test boundary condition may include a target value of the engine operating parameter to be tested and/or an adjustment rule of a critical condition to be tested, where the target value of the engine operating parameter may be set by a user according to an actual situation, and the computer device adjusts the engine operating parameter according to the set target value, for example: adjusting the engine speed to a set target speed, or adjusting the engine load to a set target load, etc., and the embodiment does not limit the operation parameters to be tested. It should be noted that the target value of the operating parameter set by the user may be stored in a condition table, and the computer device may obtain the target value from the condition table when in use. The adjustment rule of the critical condition may also be set by the user according to the actual situation, so that the computer device adjusts the critical condition to be tested of the engine according to the adjustment rule, for example: the intake and exhaust phase, the air-fuel ratio, and the ignition angle are adjusted according to the adjustment rule, and the critical condition to be tested is not limited in this embodiment. For example, taking the operation parameter to be tested as the engine speed and the critical condition to be tested as the air-fuel ratio as an example, in practical application, the computer device obtains the test boundary condition of the engine, that is, obtains the target value of the engine speed and the adjustment rule of the air-fuel ratio.
S102, adjusting the running state of the engine according to the testing boundary condition of the engine.
Based on the target value of the to-be-tested operating parameter of the engine and/or the adjustment rule of the to-be-tested critical condition obtained by the computer device in S101, the computer device adjusts the operating state of the engine according to the target value and the adjustment rule, for example, taking the to-be-tested operating parameter as the engine speed and the to-be-tested critical condition as the air-fuel ratio, the computer device adjusts the engine speed to the target value according to the obtained target value of the engine speed, and adjusts the air-fuel ratio of the engine according to the obtained adjustment rule of the air-fuel ratio. It should be noted that, when the computer device adjusts the running parameters to be tested of the engine, the critical conditions to be tested may be adjusted in real time, which is not limited in this embodiment.
S103, performing bench test on the engine according to the adjusted running state of the engine.
Based on the above S102, after the computer device adjusts the operating state of the engine, according to the adjusted engine, the computer device starts to perform the bench test on the engine, where the computer device may start to perform the bench test on the engine by triggering the bench measurement instruction, and then obtain the data to be measured. The data to be measured in the test of the engine on the bench may be parameters such as oil consumption, power, or exhaust temperature, which is not limited in this embodiment. Wherein the computer device may allow the adjusted engine to run steady for a certain time (e.g., 10S) before initiating a bench test that triggers the engine before beginning the measurement. It can be understood that, since the bench test of the engine is to test the performance or reliability of the engine under different conditions, after the test according to the test method provided by the embodiment of the present application is completed, the computer device may continue to perform the bench test of the engine under the next condition according to the set program.
It should be noted that, when the bench test method provided in this embodiment is applied to the automatic test system provided in fig. 1, part of the modules may be changed according to actual situations, for example: the control program of the automatic test software CAN be adaptively adjusted according to different engine models and different bench tests, and the BDC file communicated by the ES581CAN CAN be compiled according to different control related conditions (such as rotating speed, load, exhaust temperature, emission, combustion phase AI50 and the like) required by different bench test boundary conditions, so that the automatic test software CAN obtain the variable values and use the variable values as the related control basis of the automatic test. For example, as shown in fig. 2.1 and fig. 1, the computer device first obtains a target rotation speed from a test condition table, sends the target rotation speed to an engine bench, the engine bench adjusts a rotation speed target value of a current rotation speed of the engine, and then obtains a load target value from the test condition table, wherein the load may include torque, Mean Effective Brake pressure (BMEP), intake manifold pressure, and the like, the computer device sends the target load to the engine bench, the engine bench adjusts the current load of the engine to a corresponding target value, and simultaneously, when the computer device adjusts the rotation speed and the load of the engine, the air-fuel ratio and the ignition angle of the engine can be adjusted in real time, and then the computer device performs bench test on the engine according to the operation state of the adjusted engine.
According to the bench test method provided by the embodiment, the computer equipment adjusts the running state of the engine according to the acquired test boundary conditions of the engine, and then bench test is carried out on the engine according to the adjusted running state of the engine. In the embodiment, the test boundary condition of the engine comprises the target value of the running parameter to be tested of the engine and/or the adjustment rule of the critical condition to be tested, so that the running state of the engine can be automatically adjusted by the computer equipment according to the test boundary condition, and the engine can be automatically subjected to bench test according to the setting of the program after the running state of the engine is adjusted, manual debugging and judgment are not needed in the whole process, and the test efficiency and the precision of the test result are greatly improved.
In the above embodiments, the test boundary condition describing the engine includes a target value of an engine running parameter to be tested and/or an adjustment rule of a critical condition to be tested, the engine running parameter to be tested may include an engine speed and a load, and the critical condition to be tested of the engine may include an air-fuel ratio and an ignition angle of the engine.
In one embodiment, if the obtaining the test boundary conditions of the engine comprises: acquiring a rotating speed target value and a load target value of the engine in the test working condition table; the adjusting the operating state of the engine according to the test boundary condition of the engine comprises: and adjusting the real-time rotating speed and the load of the engine to the target value according to the target value of the rotating speed and the target value of the load of the engine respectively.
In this embodiment, the test boundary conditions of the engine obtained by the computer device are a target value of the rotational speed and a target value of the load of the engine, and the computer device adjusts the rotational speed and the load of the engine to the corresponding target values according to the target values of the rotational speed and the load, respectively, wherein the adjustment mode may be that the computer device obtains the current rotational speed and the load of the engine through a rack, then judges the current rotational speed and the load and the respective corresponding target values, respectively increases the current rotational speed and the load of the engine to the target values if the current rotational speed and the load of the engine are less than the target values, and respectively decreases the current rotational speed and the load of the engine to the target values if the current rotational speed and the load of the engine are greater than the target values. Therefore, the computer equipment automatically adjusts the current rotating speed and load of the engine according to the target values of the rotating speed and the load so as to perform bench test on the engine after the running state of the engine is adjusted to the target value, manual operation is not needed in the adjusting process, and debugging efficiency is greatly improved.
In another embodiment, if said obtaining the test boundary conditions of the engine comprises: acquiring an adjustment rule of an air-fuel ratio and an ignition angle of the engine; the regulation rule comprises the exhaust temperature quantity, the exhaust temperature limit value, the combustion knock state and the combustion phase of the engine; the adjusting the operating state of the engine according to the test boundary condition of the engine comprises: and respectively adjusting the air-fuel ratio and the ignition angle of the engine according to the adjustment rule.
In this embodiment, the test boundary conditions of the engine acquired by the computer device are adjustment rules of the air-fuel ratio and the ignition angle of the engine, where the adjustment rules include an exhaust temperature amount, an exhaust temperature limit value, a combustion knock state, and a combustion phase of the engine, and according to the adjustment rules, the computer device respectively adjusts the air-fuel ratio and the ignition angle of the engine. The adjustment mode may be a specific mode in which the computer device first determines the air-fuel ratio and the ignition angle of the engine according to the adjustment rule, and then adjusts the air-fuel ratio and the ignition angle of the engine through calibration software, for example: and the INCA is used for obtaining the current air-fuel ratio and ignition angle of the engine, judging whether the current air-fuel ratio and ignition angle need to be adjusted or not, and carrying out corresponding adjustment on the air-fuel ratio and ignition angle according to an adjustment rule when the current air-fuel ratio and ignition angle need to be adjusted. Therefore, the computer equipment automatically adjusts the current air-fuel ratio and ignition angle of the engine according to the adjustment rule so as to perform bench test on the engine after the running state of the engine is adjusted, manual operation is not needed in the adjustment process, and debugging efficiency is greatly improved.
Alternatively, the step "adjusting the air-fuel ratio and the ignition angle of the engine according to the adjustment rule" may be realized by a bench test method provided in fig. 3, which specifically includes:
s201, if the exhaust temperature of the engine is lower than the exhaust temperature limit value, adjusting the air-fuel ratio of the engine to be an equivalent air-fuel ratio.
In this embodiment, when the exhaust temperature amount and the exhaust temperature limit value of the engine are determined, the current exhaust temperature amount of the engine may be a monitoring result of the acquisition sensor, and the exhaust temperature limit value may be set by a user according to an actual situation, where the exhaust temperature limit value may be stored in a working condition table as a target value of an engine operating parameter, and when the exhaust temperature limit value needs to be used, the computer device acquires the exhaust temperature from the working condition table. For example, as shown in fig. 3.1, in practical application, the computer device first determines the current exhaust temperature amount of the engine and the magnitude of the exhaust temperature limit, and if the exhaust temperature amount of the engine is lower than the exhaust temperature limit, the air-fuel ratio of the engine is adjusted to the equivalent air-fuel ratio (14.7), wherein the adjustment mode may continue to refer to fig. 3.1, the computer device first determines the current air-fuel ratio of the engine and the magnitude of the equivalent air-fuel ratio 14.7, and if the current air-fuel ratio is smaller than the equivalent air-fuel ratio, the computer device controls the engine to reduce the fuel injection amount through the calibration software INCA, so that the air-fuel ratio is increased to the equivalent air-fuel ratio, and the air-fuel ratio reaches an optimal value. If the current air-fuel ratio is larger than the equivalent air-fuel ratio, the computer equipment controls the engine to increase the fuel injection quantity through the calibration software INCA so that the air-fuel ratio is reduced to the equivalent air-fuel ratio, and the air-fuel ratio is enabled to reach an optimal value.
S202, if the exhaust temperature of the engine is higher than the exhaust temperature limit value, adjusting the air-fuel ratio to be the air-fuel ratio corresponding to the exhaust temperature limit value.
In this step, the process of determining the size of the exhaust temperature amount and the exhaust temperature limit value of the engine by the computer device is the same as that in the step S201, which is not repeated herein, please refer to fig. 3.1, based on the result of determining the size of the exhaust temperature amount and the exhaust temperature limit value of the engine by the computer device, if the exhaust temperature amount of the engine is higher than the exhaust temperature limit value, the air-fuel ratio of the engine is adjusted by the computer device to be the air-fuel ratio corresponding to the exhaust temperature amount of the engine being the exhaust temperature limit value, wherein the specific adjustment manner may be that the computer device controls the engine to increase the fuel injection amount through the calibration software INCA, that is, decrease the air-fuel ratio to make the air-fuel ratio reach the optimal value, so that the current exhaust temperature amount of the engine is decreased to the exhaust temperature limit value.
According to the bench test method provided by the embodiment, when the exhaust temperature of the engine is lower than the exhaust temperature limit value, the air-fuel ratio of the engine is adjusted to be the equivalent air-fuel ratio by the computer equipment, and when the exhaust temperature of the engine is higher than the exhaust temperature limit value, the air-fuel ratio is adjusted to be the air-fuel ratio corresponding to the exhaust temperature limit value by the computer equipment.
Alternatively, the step "respectively adjusting the air-fuel ratio and the ignition angle of the engine according to the adjustment rule" may be another achievable manner of providing a bench test method in fig. 4, which specifically includes:
and S301, if the combustion knock state is non-knock, adjusting the ignition angle to the target value of the combustion phase.
In the present embodiment, the computer device adjusts the ignition angle to a target value of the combustion phase indicating an optimum value of the combustion phase (for example, AI 50-8) when the combustion knock state of the engine is non-knocking. As shown in fig. 4.1, in the case of non-knocking (i.e. no knocking in the figure), the computer device adjusts to the target value of the combustion phase in such a way that: the current value of the combustion phase of the engine is judged, the current value of the combustion phase of the engine is compared with 8, if the current value of the combustion phase of the engine is larger than 8, the computer device controls the engine to increase the ignition angle through the calibration software INCA so as to reduce the current combustion phase of the engine, and the optimal value that AI50 is 8 is achieved, correspondingly, if the current value of the combustion phase of the engine is smaller than 8, the computer device controls the engine to decrease the ignition angle through the calibration software INCA so as to increase the current combustion phase of the engine, and the optimal value that AI50 is 8 is achieved.
In this embodiment, the combustion knock state of the engine is a knock state and a non-knock state, wherein the combustion knock of the engine is determined according to the knock probability distribution value KP _ KHI of the combustion analyzer, for example: KP _ KHI is 0, and is no knocking, KP _ KHI is 1, and is a knocking edge, KP _ KHI is 2, and is occurrence of knocking. In one embodiment, a bench test method is provided by FIG. 5 to illustrate the relationship between the determination of the combustion knock state of an engine and the knock probability distribution values, the method comprising in particular:
s401, acquiring a knock probability distribution value output by the combustion analyzer.
The computer device obtains a knock probability distribution value output by the combustion analysis, and may be a frequency of obtaining a knock signal sent by the combustion analysis meter, and then determines the knock probability distribution value according to the frequency of the knock signal, optionally, the knock probability distribution value is a frequency distribution of the knock signal exceeding a threshold value within a preset cycle frequency of the engine at different rotation speeds. Specifically, the computer device obtains the number of times of the knock signal emitted by the combustion analyzer at different rotation speeds and within a preset number of cycles, and then determines a knock probability distribution value, where the determination of the knock probability distribution value by the computer device may be performed according to a preset rule, which is not limited in this embodiment and may be determined according to actual conditions, for example, if the preset number of cycles is 100, the preset rule is: in 100 times, if the frequency of the knock signal sent by the combustion analyzer is 0, KP _ KHI is 0, and the knock-free state is represented; if the frequency of the knock signal sent by the combustion analyzer is 1-2 times, KP _ KHI is 1, and the state of a knock edge is represented; if the number of knock signals from the combustion analyzer is greater than 2, KP _ KHI is 2, indicating that a knock state has occurred.
S402, determining the combustion knock state according to the knock probability distribution value.
Based on the knock probability distribution value determined by the computer device in the above step S401, the computer device determines the combustion knock state of the engine, and exemplarily, taking a preset rule assumed in the above step S401 as an example, the computer device determines the combustion knock state of the engine as a no-knock state when the knock probability distribution value KP _ KHI is 0, determines the combustion knock state of the engine as a knock edge state when the knock probability distribution value KP _ KHI is 1, and determines the combustion knock state of the engine as an occurrence-knock state when the knock probability distribution value KP _ KHI is 2. Therefore, the computer equipment determines the combustion knock state according to the knock probability distribution value output by the combustion analyzer, so that the accuracy of the result is greatly improved when the computer equipment adjusts the ignition angle according to the combustion knock state of the engine.
S302, if the combustion knock state is knock, adjusting the ignition angle to a combustion phase value corresponding to a knock edge.
In this step, the specific process of determining the combustion knock state of the engine by the computer device is the same as that in the step S301, which is not repeated herein, and based on the determination result, if the combustion knock state is a knock (i.e., a state with a knock), the computer device adjusts the ignition angle to the combustion phase value corresponding to the knock edge, see fig. 4.1 continuously, and the manner of adjusting the ignition angle by the computer device is to control the engine to decrease the ignition angle through the calibration software INCA so as to increase the current combustion phase of the engine, and control the combustion phase to the phase corresponding to the knock edge, that is, to obtain the optimal combustion phase value.
According to the bench test method provided by the embodiment, when the combustion knocking state is non-knocking, the computer device adjusts the ignition angle to the target value of the combustion phase, and when the combustion knocking state is knocking, the computer device adjusts the ignition angle to the combustion phase value corresponding to the knocking edge, so that according to different conditions, the computer device automatically adjusts the ignition angle of the engine according to the adjustment rule, the ignition angle of the engine is controlled to be an optimal value, the bench test is carried out on the engine after the running state of the engine is adjusted, manual operation is not needed in the adjustment process, and the debugging efficiency is greatly improved.
It should be understood that although the various steps in the flow charts of fig. 2-5 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 2-5 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.
In one embodiment, as shown in fig. 6, there is provided a stage test apparatus including: a first obtaining module 10, an adjusting module 11 and a testing module 12, wherein:
the first acquisition module 10 is used for acquiring the testing boundary conditions of the engine; the test boundary condition comprises a target value of the running parameter to be tested of the engine and/or an adjustment rule of a critical condition to be tested;
the adjusting module 11 is used for adjusting the running state of the engine according to the testing boundary condition of the engine;
and the test module 12 is used for performing bench test on the engine according to the adjusted running state of the engine.
The implementation principle and technical effect of the bench test device provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.
In one embodiment, if the first obtaining module 10 is specifically configured to obtain a target speed value and a target load value of the engine in the test condition table, the adjusting module 11 is specifically configured to adjust the real-time speed and the load of the engine to the target values according to the target speed value and the target load value of the engine, respectively.
The implementation principle and technical effect of the bench test device provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.
In yet another embodiment, if the first obtaining module 10 is specifically used for obtaining the adjustment rules of the air-fuel ratio and the ignition angle of the engine; the adjustment rule includes an exhaust temperature amount, an exhaust temperature limit value, a combustion knock state, and a combustion phase of the engine, and the adjustment module 11 is specifically configured to adjust an air-fuel ratio and an ignition angle of the engine according to the adjustment rule.
The implementation principle and technical effect of the bench test device provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.
In one embodiment, the adjusting module 11 is specifically configured to adjust the air-fuel ratio and the ignition angle of the engine according to the adjustment rule, and includes:
if the adjusting module determines that the exhaust temperature of the engine is lower than the exhaust temperature limit value, adjusting the air-fuel ratio of the engine to be an equivalent air-fuel ratio; and if the adjusting module determines that the exhaust temperature of the engine is higher than the exhaust temperature limit value, adjusting the air-fuel ratio to be the air-fuel ratio corresponding to the exhaust temperature limit value.
The implementation principle and technical effect of the bench test device provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.
In one embodiment, the adjusting module 11 is specifically configured to adjust the air-fuel ratio and the ignition angle of the engine according to the adjustment rule, and includes:
if the adjusting module determines that the combustion knock state is non-knock, adjusting the ignition angle to a target value of the combustion phase; and if the adjusting module determines that the combustion knock state is knock, adjusting the ignition angle to a combustion phase value corresponding to a knock edge.
The implementation principle and technical effect of the bench test device provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.
In one embodiment, as shown in fig. 7, there is provided a bench test apparatus, further comprising: a second obtaining module 13 and a determining module 14, wherein:
the second acquisition module 13 is used for acquiring a knock probability distribution value output by the combustion analyzer;
and the determining module 14 is used for determining the combustion knock state according to the knock probability distribution value.
The implementation principle and technical effect of the bench test device provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.
In one embodiment, the knock probability distribution values are a distribution of times that a knock signal exceeds a threshold value within a preset number of cycles at different rotational speeds of the engine.
The implementation principle and technical effect of the bench test device provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.
For the specific definition of the bench test device, reference may be made to the definition of the bench test method above, which is not described herein again. The modules in the bench test device can be wholly or partially realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as shown in fig. 8. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile 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 an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a bench test method. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the architecture shown in fig. 8 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, the present application further provides a computer device, including a memory and a processor, where the memory stores a computer program, and the processor implements the following steps when executing the computer program:
acquiring a test boundary condition of the engine; the test boundary condition comprises a target value of the running parameter to be tested of the engine and/or an adjustment rule of a critical condition to be tested;
adjusting the running state of the engine according to the testing boundary condition of the engine;
and carrying out bench test on the engine according to the adjusted running state of the engine.
The implementation principle and technical effect of the computer device provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.
In one embodiment, the present application further provides a computer readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the following steps:
acquiring a test boundary condition of the engine; the test boundary condition comprises a target value of the running parameter to be tested of the engine and/or an adjustment rule of a critical condition to be tested;
adjusting the running state of the engine according to the testing boundary condition of the engine;
and carrying out bench test on the engine according to the adjusted running state of the engine.
The implementation principle and technical effect of the computer-readable storage medium provided by the above embodiments are similar to those of the above method embodiments, and are not described herein again.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method of bench testing, the method comprising:
acquiring a test boundary condition of the engine; the test boundary condition comprises a target value of the running parameter to be tested of the engine and/or an adjustment rule of a critical condition to be tested;
adjusting the running state of the engine according to the testing boundary condition of the engine;
and carrying out bench test on the engine according to the adjusted running state of the engine.
2. The method of claim 1, wherein said obtaining a test boundary condition for the engine comprises:
acquiring a rotating speed target value and a load target value of the engine in the test working condition table;
the adjusting the operating state of the engine according to the test boundary condition of the engine comprises:
and adjusting the real-time rotating speed and the load of the engine to the target value according to the target value of the rotating speed and the target value of the load of the engine respectively.
3. The method of claim 1, wherein said obtaining a test boundary condition for the engine comprises:
acquiring an adjustment rule of an air-fuel ratio and an ignition angle of the engine; the regulation rule comprises the exhaust temperature quantity, the exhaust temperature limit value, the combustion knock state and the combustion phase of the engine;
the adjusting the operating state of the engine according to the test boundary condition of the engine comprises:
and respectively adjusting the air-fuel ratio and the ignition angle of the engine according to the adjustment rule.
4. The method of claim 3, wherein said separately adjusting the air-fuel ratio and the ignition angle of the engine according to the adjustment rules comprises:
if the exhaust temperature of the engine is lower than the exhaust temperature limit value, adjusting the air-fuel ratio of the engine to be an equivalent air-fuel ratio;
and if the exhaust temperature of the engine is higher than the exhaust temperature limit value, adjusting the air-fuel ratio to be the air-fuel ratio corresponding to the exhaust temperature limit value.
5. The method of claim 3, wherein said separately adjusting the air-fuel ratio and the ignition angle of the engine according to the adjustment rules comprises:
if the combustion knock state is non-knock, adjusting the ignition angle to a target value of the combustion phase;
and if the combustion knock state is knock, adjusting the ignition angle to a combustion phase value corresponding to a knock edge.
6. The method of claim 5, further comprising:
acquiring a detonation probability distribution value output by a combustion analyzer;
and determining the combustion knock state according to the knock probability distribution value.
7. The method of claim 6 wherein the knock probability distribution values are a distribution of times that a knock signal exceeds a threshold for a preset number of cycles at different rotational speeds of the engine.
8. A bench test apparatus, the apparatus comprising:
the first acquisition module is used for acquiring a test boundary condition of the engine; the test boundary condition comprises a target value of the running parameter to be tested of the engine and/or an adjustment rule of a critical condition to be tested;
the adjusting module is used for adjusting the running state of the engine according to the testing boundary condition of the engine;
and the test module is used for carrying out bench test on the engine according to the adjusted running state of the engine.
9. A computer device comprising a memory and a processor, the memory storing a computer program, wherein the processor implements the steps of the method of any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 7.
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| CN201811485604.4A CN111289252A (en) | 2018-12-06 | 2018-12-06 | Bench test method, device, computer equipment and storage medium |
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