Bench test system and test method

Abstract

The invention discloses a bench test system and a test method, and belongs to the technical field of test. The bench test system comprises a heat exchange mechanism, a first connecting pipe, a second connecting pipe, a first valve and a flow detector. Heat exchange liquid is contained in a second heat exchange pipeline of the heat exchange mechanism. The liquid inlet end of the first connecting pipe is suitable for being communicated with a cooling liquid outlet of a to-be-tested engine, and the liquid outlet end of the first connecting pipe is communicated with the liquid inlet end of a first heat exchange pipeline of the heat exchange mechanism. The liquid inlet end of the second connecting pipe is communicated with the liquid outlet end of the first heat exchange pipeline, the liquid outlet end of the second connecting pipe is suitable for being communicated with a cooling liquid inlet of the engine to be tested, and the cooling liquid outlet is communicated with the cooling liquid inlet. The flow detector is installed on the first connecting pipe or the second connecting pipe. The first valve is installed on the first connecting pipe or the second connecting pipe, and the opening degree of the first valve can be adjusted. According to the technical scheme, the accuracy of engine bench test results can be improved.

Description

Technical Field

[0001] The present application relates to the field of testing technology, and in particular to a bench test system and a test method. Background Art

[0002] The engine bench test is an important part of the engine test. The cooling system of the bench can simulate the operating environment of the engine under different actual working conditions, so that the performance and reliability of the engine can be evaluated based on the test results. In this way, technicians can optimize the engine based on the test results to ensure that the engine can still work normally under harsh environments. The cooling system of the bench generally includes cooling lines. However, due to the layout of other components in the bench, the cooling lines are generally long and have many bends, which can easily lead to high resistance in the cooling lines and small flow in the cooling lines, making it impossible to truly simulate the operating environment of the engine.

[0003] In the related art, in order to compensate for the coolant flow loss caused by the long cooling pipe and many bends, a water pump is installed on the cooling pipe of the cooling system in the test bench to promote the coolant in the cooling pipe to flow under the action of the water pump. However, the water pump cannot accurately control the liquid flow in the cooling pipe, which still causes a large difference between the coolant flow in the cooling pipe and the liquid flow in the actual operating environment of the engine. In other words, the cooling system in the test bench cannot more accurately simulate the actual operating environment of the engine, so the test results will have large errors and low accuracy. Summary of the invention

[0004] In view of this, the present application provides a bench test system and a test method, which can more realistically simulate the actual operating environment of the engine, thereby improving the accuracy of the engine bench test results.

[0005] On the one hand, an embodiment of the present application provides a bench test system, the bench test system comprising a heat exchange mechanism, a first connecting pipe, a second connecting pipe, a first valve and a flow detector;

[0006] The heat exchange mechanism comprises a first heat exchange pipeline and a second heat exchange pipeline separated from each other, wherein the second heat exchange pipeline contains a heat exchange liquid, and the heat exchange liquid is suitable for exchanging heat with circulating water;

[0007] The liquid inlet end of the first connecting pipe is suitable for communicating with the coolant outlet of the engine to be tested, and the liquid outlet end of the first connecting pipe is communicated with the liquid inlet end of the first heat exchange pipeline;

[0008] The liquid inlet end of the second connecting pipe is connected to the liquid outlet end of the first heat exchange pipeline, and the liquid outlet end of the second connecting pipe is suitable for connecting to the coolant inlet of the engine to be tested, wherein the coolant outlet is connected to the coolant inlet;

[0009] The flow detector is installed on the first connecting pipe or the second connecting pipe;

[0010] The first valve is installed on the first connecting pipe or the second connecting pipe, wherein the opening of the first valve is adjustable.

[0011] Optionally, the bench test system further comprises a controller, and the controller is respectively connected to the flow detector and the first valve signal.

[0012] Optionally, the heat exchange mechanism includes a first heat exchanger and a second heat exchanger;

[0013] The first heat exchanger includes the first heat exchange pipeline and the second heat exchange pipeline;

[0014] The second heat exchanger includes a third heat exchange pipeline and a fourth heat exchange pipeline which are separated. The liquid inlet of the third heat exchange pipeline is connected to the liquid outlet of the second heat exchange pipeline. The liquid inlet of the fourth heat exchange pipeline is suitable for connecting to the circulating water outlet of the circulating water system. The liquid outlet of the fourth heat exchange pipeline is suitable for connecting to the circulating water inlet of the circulating water system.

[0015] Optionally, the heat exchange mechanism further includes a third connecting pipe and a fourth connecting pipe;

[0016] The liquid inlet end of the third connecting pipe is connected to the liquid outlet end of the second heat exchange pipeline, and the liquid outlet end of the third connecting pipe is connected to the liquid inlet end of the third heat exchange pipeline;

[0017] The liquid inlet end of the fourth connecting pipe is communicated with the liquid outlet end of the third heat exchange pipeline, and the liquid outlet end of the fourth connecting pipe is communicated with the liquid inlet end of the second heat exchange pipeline.

[0018] Optionally, the bench test system further includes a second valve and a temperature sensor, and the heat exchange mechanism further includes a fifth connecting pipe and a sixth connecting pipe;

[0019] The liquid inlet end of the fifth connecting pipe is connected to the liquid outlet end of the fourth heat exchange pipeline, and the liquid outlet end of the fifth connecting pipe is suitable for connecting to the circulating water inlet;

[0020] The liquid inlet end of the sixth connecting pipe is suitable for communicating with the circulating water outlet, and the liquid outlet end of the sixth connecting pipe is communicated with the liquid inlet end of the fourth heat exchange pipeline;

[0021] The temperature sensor is installed on the first connecting pipe or the second connecting pipe;

[0022] The second valve is installed on the fifth connecting pipe, wherein the opening of the second valve is adjustable.

[0023] Optionally, the bench test system further comprises a controller, and the controller is respectively connected to the temperature sensor and the second valve signal.

[0024] On the other hand, an embodiment of the present application further provides a test method, which is applied to the bench test system described in any one of the embodiments of the present application, and the test method includes:

[0025] Acquiring a current flow rate of liquid in the first connecting pipe or the second connecting pipe;

[0026] Based on the current flow and the target flow, a target flow adjustment instruction is determined, wherein the target flow adjustment instruction is used to instruct to adjust the opening of the first valve to adjust the liquid flow in the first connecting pipe or the second connecting pipe to the target flow.

[0027] Optionally, the determining the target flow rate adjustment instruction based on the current flow rate and the target flow rate includes:

[0028] In response to the current flow being less than the target flow, generating a first adjustment instruction;

[0029] Based on the first adjustment instruction, the opening of the first valve is controlled to increase to a first target opening corresponding to the target flow rate.

[0030] Optionally, the method further comprises:

[0031] Acquiring the current temperature of the liquid in the first connecting pipe or the second connecting pipe;

[0032] Based on the current temperature and the target temperature, a target temperature adjustment instruction is determined, wherein the target temperature adjustment instruction is used to instruct to adjust the opening of the second valve to adjust the temperature of the liquid in the first connecting pipe or the second connecting pipe to the target temperature.

[0033] Optionally, determining the target temperature adjustment instruction based on the current temperature and the target temperature includes:

[0034] In response to the current temperature being less than the target temperature, generating a second adjustment instruction;

[0035] Based on the second adjustment instruction, the opening degree of the second valve is controlled to be reduced to a second target opening degree corresponding to the target temperature.

[0036] The bench test system provided by the embodiment of the present application includes a heat exchange mechanism, a first connecting pipe, a second connecting pipe, a first valve and a flow detector. The coolant inlet and the coolant outlet of the engine to be tested are respectively connected to the liquid outlet end of the second connecting pipe and the liquid inlet end of the first connecting pipe. The coolant circulates in turn between the coolant outlet of the engine to be tested, the first connecting pipe, the first heat exchange pipeline of the heat exchange mechanism, the second connecting pipe and the coolant inlet of the engine to be tested, and the heat exchange liquid in the second heat exchange pipeline of the heat exchange mechanism can exchange heat with the circulating water, and then the heat exchange liquid in the second heat exchange pipeline can exchange heat with the coolant in the first heat exchange pipeline. Since the flow detector is installed on the first connecting pipe or the second connecting pipe, and the first valve is installed on the first connecting pipe or the second connecting pipe, the opening of the first valve can be adjusted in time according to the flow value detected by the flow detector, so that the coolant flow flowing into the engine to be tested can be adjusted in time, and then the coolant flow can be adjusted to the coolant flow corresponding to the engine under the actual operating environment in time. That is to say, the bench test system provided in the embodiment of the present application can timely adjust the coolant flow rate flowing into the engine, so as to more realistically simulate the actual operating environment of the engine, thereby improving the accuracy of the engine bench test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 It is a structural schematic diagram of a bench test system provided in an embodiment of the present application;

[0039] Figure 2 It is a flow chart of a test method provided in an embodiment of the present application;

[0040] Figure 3 It is a flow chart of another test method provided in an embodiment of the present application.

[0041] Reference numerals:

[0042] 100, heat exchange mechanism; 101, first heat exchange pipeline; 102, second heat exchange pipeline; 103, first heat exchanger; 104, second heat exchanger; 105, third heat exchange pipeline; 106, fourth heat exchange pipeline; 107, third connecting pipe; 108, fourth connecting pipe; 109, fifth connecting pipe; 110, sixth connecting pipe;

[0043] 200, first connecting pipe;

[0044] 300, second connecting pipe;

[0045] 400, first valve;

[0046] 500, flow detector;

[0047] 600, engine to be tested; 601, coolant outlet; 602, coolant inlet; 603, exhaust port;

[0048] 700, controller;

[0049] 800, circulating water system; 801, circulating water outlet; 802, circulating water inlet;

[0050] 900, second valve;

[0051] 1000. Temperature sensor;

[0052] 1100, water pump;

[0053] 1200. Expansion kettle.

[0054] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0056] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meanings as commonly understood by those skilled in the art.

[0057] In order to make the technical solutions and advantages of the present application more clear, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0058] like Figure 1 As shown, an embodiment of the present application provides a bench test system, which includes a heat exchange mechanism 100 , a first connecting pipe 200 , a second connecting pipe 300 , a first valve 400 and a flow detector 500 .

[0059] The heat exchange mechanism 100 includes a first heat exchange pipeline 101 and a second heat exchange pipeline 102 which are separated, wherein the second heat exchange pipeline 102 contains a heat exchange liquid, and the heat exchange liquid is suitable for exchanging heat with circulating water.

[0060] The liquid inlet end of the first connecting pipe 200 is suitable for communicating with the coolant outlet 601 of the engine 600 to be tested, and the liquid outlet end of the first connecting pipe 200 is communicated with the liquid inlet end of the first heat exchange pipeline 101 .

[0061] The liquid inlet end of the second connecting pipe 300 is connected to the liquid outlet end of the first heat exchange pipeline 101, and the liquid outlet end of the second connecting pipe 300 is suitable for being connected to the coolant inlet 602 of the engine 600 to be tested, wherein the coolant outlet 601 is connected to the coolant inlet 602. Thus, the coolant can circulate in sequence among the coolant outlet 601 of the engine 600 to be tested, the first connecting pipe 200, the first heat exchange pipeline 101 of the heat exchange mechanism 100, the second connecting pipe 300 and the coolant inlet 602 of the engine 600 to be tested. Since the heat exchange liquid in the second heat exchange pipeline 102 of the heat exchange mechanism 100 can exchange heat with the circulating water, the heat exchange liquid in the second heat exchange pipeline 102 after heat exchange with the circulating water can exchange heat with the coolant in the first heat exchange pipeline 101.

[0062] The flow detector 500 is installed on the first connecting pipe 200 or the second connecting pipe 300. It should be noted that the flow detector 500 in the embodiment of the present application can be, for example, a flow meter or a flow sensor, which is used to detect the flow of the coolant in the first connecting pipe 200 or the second connecting pipe 300 to obtain the current flow of the coolant in the first connecting pipe 200 and the second connecting pipe 300.

[0063] The first valve 400 is installed on the first connecting pipe 200 or the second connecting pipe 300, wherein the opening of the first valve 400 is adjustable. With such an arrangement, the opening of the first valve 400 can be timely adjusted according to the flow value detected by the flow detector 500, so that the coolant flow rate flowing into the engine 600 to be tested can be timely adjusted, and then the coolant flow rate can be timely adjusted to the coolant flow rate corresponding to the engine under the actual operating environment. It should be noted that the coolant flow rate can be the target flow rate corresponding to the engine under different operating environments set by the tester. The direction of liquid flow in each pipeline is determined according to the attached Figure 1 Flow in the direction indicated by the arrow.

[0064] That is to say, the bench test system provided in the embodiment of the present application can timely adjust the coolant flow rate flowing into the engine according to the coolant flow rate detected by the flow detector 500, thereby more realistically simulating the actual operating environment of the engine, thereby improving the accuracy of the engine bench test results.

[0065] The following is combined with Figure 1 The details and functions of the bench test system provided in the embodiment of the present application are described in more detail.

[0066] In some embodiments, the bench test system further includes a controller 700, and the controller 700 is respectively connected to the flow detector 500 and the first valve 400 by signal. It should be noted that the two components of the signal connection in the embodiment of the present application can be connected by a wiring harness. The first valve 400 can be, for example, an electrically controlled proportional valve, and signal transmission or instruction transmission can be performed between the first valve 400 and the controller 700, and signal transmission or instruction transmission can be performed between the flow detector 500 and the controller 700. The flow detector 500 is used to send the current flow of the coolant in the first connecting pipe 200 or the second connecting pipe 300 obtained by detection to the controller 700, and the controller 700 is used to control and adjust the opening of the first valve 400 based on the current flow and the target flow corresponding to the actual operation of the engine set by the tester under the test condition. For example, if the current flow is less than the target flow, the controller 700 controls the opening of the first valve 400 to increase to the target opening corresponding to the target flow, so that the flow can be accurately and efficiently adjusted, and the actual operating environment of the engine can be more realistically simulated, thereby improving the accuracy of the engine bench test results.

[0067] In some embodiments, the heat exchange mechanism 100 includes a first heat exchanger 103 and a second heat exchanger 104. The first heat exchanger 103 includes a first heat exchange pipeline 101 and a second heat exchange pipeline 102.

[0068] The second heat exchanger 104 includes a third heat exchange pipeline 105 and a fourth heat exchange pipeline 106 which are separated. The liquid inlet of the third heat exchange pipeline 105 is connected to the liquid outlet of the second heat exchange pipeline 102. The liquid inlet of the fourth heat exchange pipeline 106 is suitable for being connected to the circulating water outlet 801 of the circulating water system 800. The liquid outlet of the fourth heat exchange pipeline 106 is suitable for being connected to the circulating water inlet 802 of the circulating water system 800. In this way, the liquid in the third heat exchange pipeline 105 can circulate between the third heat exchange pipeline 105 and the second heat exchange pipeline 102. The circulating water can circulate between the fourth heat exchange pipeline 106 and the circulating water system 800. In other words, the circulating water can flow out from the circulating water outlet 801 to the fourth heat exchange pipeline 106, and then flow back to the circulating water inlet 802. It should be noted that the circulating water system 800 in the embodiment of the present application is a system that can reuse cooling water or process water. The circulating water flowing out of the fourth heat exchange pipeline 106 can flow back into the circulating water system 800. The circulating water treated by the circulating water system 800 will flow out from the circulating water outlet 801 to the fourth heat exchange pipeline 106 again to reduce the liquid temperature in the fourth heat exchange pipeline 106. In this way, water can be reused, and the fourth heat exchange pipeline 106 can also perform heat exchange with the third heat exchange pipeline 105, and then the third heat exchange pipeline 105 can perform heat exchange with the second heat exchange pipeline 102, so as to more realistically simulate the heat dissipation process of the engine under actual working conditions and improve the accuracy of the bench test results.

[0069] In some embodiments, the heat exchange mechanism 100 further includes a third connecting pipe 107 and a fourth connecting pipe 108. The liquid inlet end of the third connecting pipe 107 is connected to the liquid outlet end of the second heat exchange pipeline 102, and the liquid outlet end of the third connecting pipe 107 is connected to the liquid inlet end of the third heat exchange pipeline 105. The liquid inlet end of the fourth connecting pipe 108 is connected to the liquid outlet end of the third heat exchange pipeline 105, and the liquid outlet end of the fourth connecting pipe 108 is connected to the liquid inlet end of the second heat exchange pipeline 102. It can be understood that the third connecting pipe 107 and the fourth connecting pipe 108 increase the flow path of the liquid, which is more conducive to the heat exchange between the second heat exchange pipeline 102 and the first heat exchange pipeline 101 and the third heat exchange pipeline 105 respectively.

[0070] In some embodiments, the bench test system further includes a second valve 900 and a temperature sensor 1000 , and the heat exchange mechanism 100 further includes a fifth connecting pipe 109 and a sixth connecting pipe 110 .

[0071] The liquid inlet end of the fifth connecting pipe 109 is connected to the liquid outlet end of the fourth heat exchange pipeline 106, and the liquid outlet end of the fifth connecting pipe 109 is suitable for being connected to the circulating water inlet 802. The liquid inlet end of the sixth connecting pipe 110 is suitable for being connected to the circulating water outlet 801, and the liquid outlet end of the sixth connecting pipe 110 is connected to the liquid inlet end of the fourth heat exchange pipeline 106.

[0072] The temperature sensor 1000 is installed on the first connecting pipe 200 or the second connecting pipe 300, so that the temperature sensor 1000 can detect the temperature of the coolant in the first connecting pipe 200 or the second connecting pipe 300 to obtain the current temperature of the coolant in the first connecting pipe 200 or the second connecting pipe 300. The second valve 900 is installed on the fifth connecting pipe 109, wherein the opening of the second valve 900 is adjustable. It should be noted that since the opening of the second valve 900 is adjustable, the opening of the second valve 900 can be adjusted in time according to the current temperature detected by the temperature sensor 1000 and the target temperature corresponding to the engine under different operating environments set by the tester, so as to more realistically simulate the real operating environment of the engine, thereby improving the accuracy of the test results. It should be understood that the opening of the second valve 900 is associated with the circulating water resistance. The smaller the opening of the second valve 900, the greater the circulating water resistance, and the smaller the circulating water flow rate back to the circulating water system 800, so that the cooling capacity of the circulating water in the fourth heat exchange pipeline 106 is reduced. In this way, the temperature of the liquid in the third heat exchange pipeline 105 that performs heat exchange with the fourth heat exchange pipeline 106 will increase, so that the temperature of the liquid in the second heat exchange pipeline 102 that performs heat exchange with the third heat exchange pipeline 105 will increase, and then the temperature of the coolant in the first heat exchange pipeline 101 that performs heat exchange with the second heat exchange pipeline 102 will gradually increase to the target temperature. It should be understood that if the current temperature is greater than the target temperature, the opening of the second valve 900 should be increased to increase the circulating water flow rate to improve the cooling capacity of the circulating water until the temperature of the coolant in the first connecting pipe 200 drops to the target temperature.

[0073] In some embodiments, the bench test system further includes a controller 700, and the controller 700 is respectively connected to the temperature sensor 1000 and the second valve 900 by signal. It should be noted that the controller 700 and the controller 700 connected to the flow detector 500 by signal as described above can be the same controller 700, or two different controllers 700. The controller 700 can be, for example, a PID controller (Proportion Integration Differentiation, proportional-integral-differential controller), so that the opening of the first valve 400 and the opening of the second valve 900 can be accurately adjusted. The second valve 900 can be, for example, an electrically controlled proportional valve, and signal transmission or command transmission can be performed between the second valve 900 and the controller 700, and signal transmission or command transmission can be performed between the temperature sensor 1000 and the controller 700. The temperature sensor 1000 is used to send the current temperature of the coolant in the first connecting pipe 200 or the second connecting pipe 300 to the controller 700. The controller 700 is used to control and adjust the opening of the second valve 900 based on the current temperature and the target temperature corresponding to the actual operation of the engine under the test condition set by the tester. It should be noted that the principle of increasing or decreasing the opening of the second valve 900 according to the comparison result between the current temperature and the target temperature has been explained above, so the embodiment of the present application will not be repeated here.

[0074] In some embodiments, the bench test system further includes a water pump 1100, and the water pump 1100 is connected to the third connecting pipe 107 or the fourth connecting pipe 108. It should be noted that by providing the water pump 1100, power can be provided for the liquid flowing in the third connecting pipe 107 or the fourth connecting pipe 108, so as to facilitate the liquid to flow between the second heat exchange pipeline 102 and the third heat exchange pipeline 105, thereby ensuring the smooth progress of heat exchange.

[0075] In some embodiments, the bench test system further includes an expansion kettle 1200, which is respectively connected to the exhaust port 603 of the engine to be tested and the second connecting pipe 300. It should be noted that the exhaust port 603 is respectively connected to the coolant outlet 601 and the coolant inlet 602. The expansion kettle 1200 is an expansion kettle on the whole vehicle to be installed with the engine to be tested 600 or an equivalent replacement with the same performance parameters as the expansion kettle of the whole vehicle. The expansion kettle 1200 contains coolant, which enters the engine to be tested 600 through the expansion kettle 1200, the second connecting pipe 300 and the coolant inlet 602 in sequence, and then flows out through the coolant outlet 601. When injecting coolant into the engine to be tested 600, the gas in the coolant flow channel in the engine to be tested 600 can also be discharged into the expansion kettle 1200 through the exhaust port 603, so that the residual gas in the engine to be tested 600 can be discharged in time to ensure that the coolant is injected into the engine to be tested 600.

[0076] From the above, it can be seen that the bench test system provided in the embodiment of the present application can timely adjust the flow rate in the coolant pipeline or the flow rate of circulating water used to cool the coolant according to the current flow rate and current temperature of the coolant by utilizing the controller 700, so as to flexibly and accurately adjust the liquid flow rate in the coolant pipeline and the temperature of the coolant, thereby more realistically simulating the liquid flow rate and liquid temperature corresponding to the actual operating environment of the engine, thereby improving the accuracy of the bench test results. More accurate test results are also more conducive to testers to accurately adjust the engine to improve the performance of the engine.

[0077] On the other hand, Figure 2 As shown, the embodiment of the present application further provides a test method, which is applied to the bench test system of any one of the above embodiments of the present application. The test method can be executed by the controller 700 in the bench test system. The test method includes the following steps 101 to 102.

[0078] In step 101 , the controller 700 obtains the current flow rate of the liquid in the first connecting pipe 200 or the second connecting pipe 300 .

[0079] In some embodiments, the controller 700 may obtain the current flow rate from the flow detector 500 in real time or at preset intervals.

[0080] In step 102 , the controller 700 determines a target flow rate adjustment instruction based on the current flow rate and the target flow rate.

[0081] The target flow rate adjustment instruction is used to instruct to adjust the opening of the first valve 400 so as to adjust the liquid flow in the first connecting pipe 200 or the second connecting pipe 300 to the target flow rate. It should be noted that the target flow rate is the target flow rate corresponding to the engine running under the test condition preset by the tester. It should be understood that different test conditions have corresponding target flows.

[0082] From the above, it can be seen that by using the test method provided in the embodiment of the present application, the coolant flow rate flowing into the engine can be adjusted in time according to the current flow rate of the coolant detected by the flow detector 500, thereby being able to more realistically simulate the actual operating environment of the engine, thereby improving the accuracy of the engine bench test results.

[0083] On the other hand, Figure 3 As shown, the embodiment of the present application further provides a test method, which is applied to the bench test system of any one of the above embodiments of the present application. The test method can be executed by the controller 700 in the bench test system. The test method includes the following steps 201 to 204.

[0084] In step 201 , the controller 700 obtains the current flow rate of the liquid in the first connecting pipe 200 or the second connecting pipe 300 .

[0085] It should be noted that step 201 is the same as step 101, so the embodiment of the present application will not be repeated here.

[0086] In step 202 , the controller 700 determines a target flow rate adjustment instruction based on the current flow rate and the target flow rate.

[0087] The target flow rate adjustment instruction is used to instruct to adjust the opening of the first valve 400 so as to adjust the liquid flow rate in the first connecting pipe 200 or the second connecting pipe 300 to the target flow rate.

[0088] In some embodiments, the controller 700 determines the target flow rate adjustment instruction based on the current flow rate and the target flow rate, including: the controller 700 generates a first adjustment instruction in response to the current flow rate being less than the target flow rate. The controller 700 controls the opening of the first valve 400 to increase to a first target opening corresponding to the target flow rate based on the first adjustment instruction. It should be noted that when the opening of the first valve 400 is the first target opening, the flow rate flowing through the first valve 400 is the target flow rate. It can be understood that by increasing the opening of the first valve 400, the flow rate of the fluid allowed to pass through the first valve 400 can be increased, thereby increasing the coolant flow rate flowing in the engine 600 to be tested, so as to more realistically simulate the operating environment of the engine under the test condition, thereby improving the accuracy of the bench test results.

[0089] In some examples, the controller 700 determines the target flow rate adjustment instruction based on the current flow rate and the target flow rate, including: the controller 700 generates a third adjustment instruction in response to the current flow rate being less than the target flow rate. Based on the third adjustment instruction, the controller 700 controls the opening of the first valve 400 to be reduced to a first target opening corresponding to the target flow rate. It can be understood that by reducing the opening of the first valve 400, the flow rate of the fluid allowed to pass through the first valve 400 can be reduced, thereby reducing the coolant force flowing in the engine 600 to be tested, so as to more realistically simulate the operating environment of the engine under the test condition, thereby improving the accuracy of the bench test results.

[0090] In some embodiments, the controller 700 determines the target flow rate adjustment instruction based on the current flow rate and the target flow rate, including: the controller 700 controls the opening of the first valve 400 to maintain at the first target opening in response to the current flow rate being equal to the target flow rate within the first preset time. This can simulate the operation of the engine in a stable operating environment and accurately verify the performance of the engine.

[0091] In step 203 , the controller 700 obtains the current temperature of the liquid in the first connecting pipe 200 or the second connecting pipe 300 .

[0092] In some embodiments, the controller 700 may obtain the current flow rate from the temperature sensor 1000 in real time or at preset intervals.

[0093] In step 204 , the controller 700 determines a target temperature adjustment instruction based on the current temperature and the target temperature.

[0094] Among them, the target temperature adjustment instruction is used to instruct to adjust the opening of the second valve 900 so as to adjust the temperature of the liquid in the first connecting pipe 200 or the second connecting pipe 300 to the target temperature. It should be noted that the target temperature is the target temperature corresponding to the engine running under the test condition preset by the tester. It should be understood that different test conditions have corresponding target temperatures. By adjusting the temperature of the coolant in the engine in time according to the current temperature of the coolant detected by the temperature sensor 1000, the actual operating environment and operating state of the engine can be simulated more realistically, thereby improving the accuracy of the engine bench test results.

[0095] In some embodiments, the controller 700 determines the target temperature adjustment instruction based on the current temperature and the target temperature, including: the controller 700 generates a second adjustment instruction in response to the current temperature being less than the target temperature. Based on the second adjustment instruction, the controller 700 controls the opening of the second valve 900 to be reduced to a second target opening corresponding to the target temperature. It should be noted that by reducing the opening of the second valve 900, the cooling capacity of the circulating water in the fourth heat exchange pipeline 106 can be reduced, thereby increasing the temperature of the liquid in the third heat exchange pipeline 105, and then the temperature of the liquid in the second heat exchange pipeline 102 that performs heat exchange with the third heat exchange pipeline 105 will also increase, thereby increasing the temperature of the coolant in the first heat exchange pipeline 101 that performs heat exchange with the second heat exchange pipeline 102. In this way, the operating environment and operating state of the engine under the test condition can be more realistically simulated, thereby improving the accuracy of the bench test results.

[0096] In some embodiments, the controller 700 determines the target temperature adjustment instruction based on the current temperature and the target temperature, including: the controller 700 generates a fourth adjustment instruction in response to the current temperature being greater than the target temperature. Based on the fourth adjustment instruction, the controller 700 controls the opening of the second valve 900 to increase to a second target opening corresponding to the target temperature. It should be noted that by increasing the opening of the second valve 900, the cooling capacity of the circulating water in the fourth heat exchange pipeline 106 can be increased, and then the temperature of the coolant circulating in the engine 600 to be tested can be indirectly reduced through heat exchange of each heat exchange pipeline, so as to more realistically simulate the operating environment of the engine under the test condition, thereby improving the accuracy of the bench test results.

[0097] In some embodiments, the controller 700 determines the target temperature adjustment instruction based on the current temperature and the target temperature, including: the controller 700 controls the opening of the second valve 900 to maintain the second target opening in response to the current temperature being equal to the target temperature within the second preset time. This can simulate the operation of the engine in a stable operating environment and accurately verify the performance of the engine.

[0098] As can be seen from the above, the test method provided in the embodiment of the present application can timely and flexibly adjust the opening of the first valve 400 or the opening of the second valve 900 according to the current flow rate and current temperature of the coolant in the engine to be tested, so as to more realistically simulate the operating state of the engine in a real operating environment. Thus, the accuracy of the bench test results can be improved.

[0099] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the present application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only.

[0100] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A bench test system, characterized in that: The bench test system comprises a heat exchange mechanism (100), a first connecting pipe (200), a second connecting pipe (300), a first valve (400) and a flow detector (500); The heat exchange mechanism (100) comprises a first heat exchange pipeline (101) and a second heat exchange pipeline (102) which are separated, wherein the second heat exchange pipeline (102) contains a heat exchange liquid, and the heat exchange liquid is suitable for exchanging heat with circulating water; The liquid inlet end of the first connecting pipe (200) is suitable for communicating with the coolant outlet (601) of the engine (600) to be tested, and the liquid outlet end of the first connecting pipe (200) is communicated with the liquid inlet end of the first heat exchange pipeline (101); The liquid inlet end of the second connecting pipe (300) is in communication with the liquid outlet end of the first heat exchange pipeline (101), and the liquid outlet end of the second connecting pipe (300) is suitable for being in communication with the coolant inlet (602) of the engine (600) to be tested, wherein the coolant outlet (601) is in communication with the coolant inlet (602); The flow detector (500) is installed on the first connecting pipe (200) or the second connecting pipe (300); The first valve (400) is installed on the first connecting pipe (200) or the second connecting pipe (300), wherein the opening degree of the first valve (400) is adjustable.

2. The bench test system according to claim 1, characterized in that: The bench test system further comprises a controller (700), wherein the controller (700) is respectively connected to the flow detector (500) and the first valve (400) via signals.

3. The bench test system according to claim 1, characterized in that: The heat exchange mechanism (100) comprises a first heat exchanger (103) and a second heat exchanger (104); The first heat exchanger (103) comprises the first heat exchange pipeline (101) and the second heat exchange pipeline (102); The second heat exchanger (104) comprises a third heat exchange pipeline (105) and a fourth heat exchange pipeline (106) which are separated, the liquid inlet end of the third heat exchange pipeline (105) being connected to the liquid outlet end of the second heat exchange pipeline (102), the liquid inlet of the fourth heat exchange pipeline (106) being suitable for connecting to the circulating water outlet (801) of the circulating water system (800), and the liquid outlet of the fourth heat exchange pipeline (106) being suitable for connecting to the circulating water inlet (802) of the circulating water system (800).

4. The bench test system according to claim 3, characterized in that: The heat exchange mechanism (100) further includes a third connecting pipe (107) and a fourth connecting pipe (108); The liquid inlet end of the third connecting pipe (107) is in communication with the liquid outlet end of the second heat exchange pipeline (102), and the liquid outlet end of the third connecting pipe (107) is in communication with the liquid inlet end of the third heat exchange pipeline (105); The liquid inlet end of the fourth connecting pipe (108) is connected to the liquid outlet end of the third heat exchange pipeline (105), and the liquid outlet end of the fourth connecting pipe (108) is connected to the liquid inlet end of the second heat exchange pipeline (102).

5. The bench test system according to claim 3, characterized in that: The bench test system further comprises a second valve (900) and a temperature sensor (1000), and the heat exchange mechanism (100) further comprises a fifth connecting pipe (109) and a sixth connecting pipe (110); The liquid inlet end of the fifth connecting pipe (109) is connected to the liquid outlet end of the fourth heat exchange pipeline (106), and the liquid outlet end of the fifth connecting pipe (109) is suitable for connecting to the circulating water inlet (802); The liquid inlet end of the sixth connecting pipe (110) is suitable for communicating with the circulating water outlet (801), and the liquid outlet end of the sixth connecting pipe (110) is communicated with the liquid inlet end of the fourth heat exchange pipeline (106); The temperature sensor (1000) is installed on the first connecting pipe (200) or the second connecting pipe (300); The second valve (900) is installed on the fifth connecting pipe (109), wherein the opening degree of the second valve (900) is adjustable.

6. The bench test system according to claim 5, characterized in that: The bench test system further comprises a controller (700), wherein the controller (700) is respectively connected to the temperature sensor (1000) and the second valve (900) via signals.

7. A test method, characterized in that: The method is applied to the bench test system according to any one of claims 1 to 6, and the test method comprises: Acquiring a current flow rate of liquid in the first connecting pipe (200) or in the second connecting pipe (300); Based on the current flow rate and the target flow rate, a target flow rate adjustment instruction is determined, wherein the target flow rate adjustment instruction is used to instruct to adjust the opening of the first valve (400) so as to adjust the liquid flow in the first connecting pipe (200) or the second connecting pipe (300) to the target flow rate.

8. The test method according to claim 7, characterized in that: The step of determining a target flow rate adjustment instruction based on the current flow rate and the target flow rate includes: In response to the current flow being less than the target flow, generating a first adjustment instruction; Based on the first adjustment instruction, the opening of the first valve (400) is controlled to increase to a first target opening corresponding to the target flow rate.

9. The test method according to claim 8, characterized in that The method further comprises: Acquiring the current temperature of the liquid in the first connecting pipe (200) or the second connecting pipe (300); Based on the current temperature and the target temperature, a target temperature adjustment instruction is determined, wherein the target temperature adjustment instruction is used to instruct to adjust the opening of the second valve (900) so as to adjust the temperature of the liquid in the first connecting pipe (200) or the second connecting pipe (300) to the target temperature.

10. The test method according to claim 9, characterized in that: The step of determining a target temperature adjustment instruction based on the current temperature and the target temperature includes: In response to the current temperature being less than the target temperature, generating a second adjustment instruction; Based on the second adjustment instruction, the opening degree of the second valve (900) is controlled to be reduced to a second target opening degree corresponding to the target temperature.

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