Bench test system and test methods
By introducing a heat exchange mechanism, connecting pipes, flow detectors, and adjustable valves into the engine bench test system, the problem of coolant flow loss was solved, enabling accurate simulation of the actual engine operating environment and improving the accuracy of test results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHERY AUTOMOBILE CO LTD
- Filing Date
- 2025-01-23
- Publication Date
- 2026-06-02
AI Technical Summary
In existing engine bench testing systems, the cooling pipes are long and have many bends, resulting in coolant flow loss. This makes it impossible to accurately simulate the actual operating environment of the engine, leading to large errors and low accuracy in the test results.
By employing a combination of heat exchange mechanism, connecting pipe, flow detector and adjustable valve, the flow detector detects the coolant flow rate, and the controller adjusts the valve opening to precisely control the coolant flow rate and temperature, thereby simulating the actual operating environment of the engine.
This improves the accuracy of engine bench test results, enabling a more realistic simulation of coolant flow and temperature under actual engine operating conditions, thus ensuring the accuracy of test results.
Smart Images
Figure CN119915520B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of testing technology, specifically to a bench testing system and testing method. Background Technology
[0002] Engine bench testing is a crucial part of engine testing. The bench's cooling system simulates the engine's operating environment under various real-world conditions, allowing for the evaluation of engine performance and reliability based on test results. This enables technicians to optimize the engine based on the test results, ensuring its proper functioning under harsh environments. A bench cooling system typically includes cooling pipes. However, due to the arrangement of other components within the bench, these cooling pipes are generally long and have many bends, which can easily lead to high resistance and low flow rate, thus failing to accurately simulate the engine's operating environment.
[0003] In related technologies, to compensate for coolant flow loss caused by long and winding cooling pipes, a water pump is installed on the cooling pipes of the cooling system in a test bench to facilitate coolant flow. However, the water pump cannot precisely control the liquid flow rate in the cooling pipes, resulting in a significant difference between the coolant flow rate in the cooling pipes and the coolant flow rate in the engine's actual operating environment. In other words, the cooling system in the test bench cannot accurately simulate the actual engine operating environment, leading to significant errors and low accuracy in the test results. Summary of the Invention
[0004] In view of this, this application provides a bench test system and test method that can more realistically simulate the actual operating environment of the engine, thereby improving the accuracy of engine bench test results.
[0005] On one hand, embodiments of this application provide a bench test system, which includes a heat exchange mechanism, a first connecting pipe, a second connecting pipe, a first valve, and a flow detector;
[0006] The heat exchange mechanism includes 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 heat exchange with circulating water.
[0007] The inlet end of the first connecting pipe is adapted to be connected to the coolant outlet of the engine under test, and the outlet end of the first connecting pipe is connected to the inlet end of the first heat exchange pipeline.
[0008] The inlet end of the second connecting pipe is connected to the outlet end of the first heat exchange pipe, and the outlet end of the second connecting pipe is adapted to be connected to the coolant inlet of the engine under test, 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 degree of the first valve is adjustable.
[0011] Optionally, the bench test system further includes a controller, which is connected to the flow detector and the first valve signal, respectively.
[0012] Optionally, the heat exchange mechanism includes a first heat exchanger and a second heat exchanger;
[0013] The first heat exchanger includes a first heat exchange pipeline and a second heat exchange pipeline;
[0014] The second heat exchanger includes a third heat exchange pipeline and a fourth heat exchange pipeline separated from each other. 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 adapted to be connected to the circulating water outlet of the circulating water system, and the liquid outlet of the fourth heat exchange pipeline is adapted to be connected 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 inlet end of the third connecting pipe is connected to the outlet end of the second heat exchange pipeline, and the outlet end of the third connecting pipe is connected to the inlet end of the third heat exchange pipeline.
[0017] The inlet end of the fourth connecting pipe is connected to the outlet end of the third heat exchange pipe, and the outlet end of the fourth connecting pipe is connected to the inlet end of the second heat exchange pipe.
[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 of the fifth connecting pipe is connected to the liquid outlet of the fourth heat exchange pipe, and the liquid outlet of the fifth connecting pipe is adapted to be connected to the circulating water inlet.
[0020] The inlet end of the sixth connecting pipe is adapted to be connected to the circulating water outlet, and the outlet end of the sixth connecting pipe is connected to the 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 degree of the second valve is adjustable.
[0023] Optionally, the bench test system further includes a controller, which is connected to the temperature sensor and the second valve signal respectively.
[0024] On the other hand, this application also provides a testing method, which is applied to the bench testing system described in any one of the above embodiments of this application, the testing method comprising:
[0025] Obtain the current flow rate of the liquid in the first connecting pipe or the second connecting pipe;
[0026] Based on the current flow rate and the target flow rate, a target flow rate adjustment command is determined, wherein the target flow rate adjustment command is used to instruct the adjustment of the opening of the first valve to adjust the liquid flow rate in the first connecting pipe or the second connecting pipe to the target flow rate.
[0027] Optionally, determining the target traffic adjustment instruction based on the current traffic and the target traffic includes:
[0028] In response to the current flow being less than the target flow, a first adjustment command is generated;
[0029] Based on the first adjustment command, the opening of the first valve is increased to a first target opening corresponding to the target flow rate.
[0030] Optionally, the method further includes:
[0031] Obtain the current temperature of the liquid inside the first connecting pipe or the second connecting pipe;
[0032] Based on the current temperature and the target temperature, a target temperature adjustment command is determined, wherein the target temperature adjustment command is used to instruct the adjustment of the opening degree 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 command based on the current temperature and the target temperature includes:
[0034] In response to the current temperature being lower than the target temperature, a second adjustment command is generated;
[0035] Based on the second adjustment command, the opening of the second valve is reduced to a second target opening corresponding to the target temperature.
[0036] The bench test system provided in this 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 coolant outlet of the engine under test are connected to the outlet end of the second connecting pipe and the inlet end of the first connecting pipe, respectively. The coolant circulates sequentially between the coolant outlet of the engine under test, the first connecting pipe, the first heat exchange pipe of the heat exchange mechanism, the second connecting pipe, and the coolant inlet of the engine under test. The heat exchange liquid in the second heat exchange pipe of the heat exchange mechanism can exchange heat with the circulating water, and thus the heat exchange liquid in the second heat exchange pipe can exchange heat with the coolant in the first heat exchange pipe. Since a flow detector and a first valve are installed on the first or second connecting pipe, the opening of the first valve can be adjusted in a timely manner according to the flow rate value detected by the flow detector, thereby adjusting the coolant flow rate into the engine under test in a timely manner, and thus adjusting the coolant flow rate to the coolant flow rate corresponding to the engine under actual operating conditions. In other words, the bench test system provided in this application embodiment can adjust the flow rate of coolant into the engine in a timely manner, thereby more realistically simulating the actual operating environment of the engine and improving the accuracy of the engine bench test results. Attached Figure Description
[0037] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0038] Figure 1 This is a schematic diagram of the structure of a bench testing system provided in an embodiment of this application;
[0039] Figure 2 This is a flowchart of an experimental method provided in an embodiment of this application;
[0040] Figure 3 This is a flowchart of another testing method provided in the embodiments of this application.
[0041] Figure label:
[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 under test; 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 accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation
[0055] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0056] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by those skilled in the art.
[0057] To make the technical solutions and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.
[0058] like Figure 1 As shown in the figure, this 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 pipe 101 and a second heat exchange pipe 102 separated from each other, wherein the second heat exchange pipe 102 contains a heat exchange liquid, and the heat exchange liquid is suitable for exchanging heat with circulating water.
[0060] The inlet end of the first connecting pipe 200 is adapted to be connected to the coolant outlet 601 of the engine under test 600, and the outlet end of the first connecting pipe 200 is connected to the inlet end of the first heat exchange pipe 101.
[0061] The inlet end of the second connecting pipe 300 is connected to the outlet end of the first heat exchange pipe 101, and the outlet end of the second connecting pipe 300 is adapted to be connected to the coolant inlet 602 of the engine under test 600. The coolant outlet 601 is connected to the coolant inlet 602. Thus, the coolant can circulate sequentially between the coolant outlet 601 of the engine under test 600, the first connecting pipe 200, the first heat exchange pipe 101 of the heat exchange mechanism 100, the second connecting pipe 300, and the coolant inlet 602 of the engine under test 600. Since the heat exchange liquid in the second heat exchange pipe 102 of the heat exchange mechanism 100 can exchange heat with the circulating water, the heat exchange liquid in the second heat exchange pipe 102, after exchanging heat with the circulating water, can exchange heat with the coolant in the first heat exchange pipe 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 this embodiment can be, for example, a flow meter or a flow sensor, used to detect the flow rate of the coolant in the first connecting pipe 200 or the second connecting pipe 300, and obtain the current flow rate of the coolant in the first connecting pipe 200 and the second connecting pipe 300.
[0063] The first valve 400 is installed on either the first connecting pipe 200 or the second connecting pipe 300, and its opening is adjustable. This configuration allows for timely adjustment of the first valve 400's opening based on the flow rate detected by the flow detector 500, thereby regulating the coolant flow rate into the engine under test 600 and adjusting it to the level appropriate for the engine's actual operating conditions. It should be noted that the coolant flow rate can be a target flow rate set by the tester for different operating conditions of the engine. The liquid flow direction in each pipe follows the attached diagram. Figure 1 The flow is in the direction indicated by the middle arrow.
[0064] In other words, the bench test system provided in this application embodiment can adjust the coolant flow rate into the engine in a timely manner based on the coolant flow rate detected by the flow detector 500, thereby more realistically simulating the actual operating environment of the engine and improving the accuracy of the engine bench test results.
[0065] The following is in conjunction with the appendix Figure 1 The details and functions of the bench testing system provided in the embodiments of this application will be described in more specific and detailed manner.
[0066] In some embodiments, the bench test system further includes a controller 700, which is signal-connected to both the flow detector 500 and the first valve 400. It should be noted that the two signal-connected components in this embodiment can be connected via a wiring harness. The first valve 400 can be, for example, an electronically controlled proportional valve. Signal or command transmission can occur between the first valve 400 and the controller 700, and signal or command transmission can also occur between the flow detector 500 and the controller 700. The flow detector 500 sends the detected current flow rate of the coolant in the first connecting pipe 200 or the second connecting pipe 300 to the controller 700. The controller 700 controls and adjusts the opening of the first valve 400 based on the current flow rate and the target flow rate set by the tester for the engine's actual operation under test conditions. For example, if the current flow rate is less than the target flow rate, the controller 700 controls the opening of the first valve 400 to increase to the target opening rate, thereby enabling precise and efficient flow rate adjustment and more realistic simulation of the engine's actual operating environment, thus 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 pipe 101 and a second heat exchange pipe 102.
[0068] The second heat exchanger 104 includes a separated third heat exchange pipe 105 and a fourth heat exchange pipe 106. The liquid inlet of the third heat exchange pipe 105 is connected to the liquid outlet of the second heat exchange pipe 102. The liquid inlet of the fourth heat exchange pipe 106 is adapted to be connected to the circulating water outlet 801 of the circulating water system 800, and the liquid outlet of the fourth heat exchange pipe 106 is adapted to be connected to the circulating water inlet 802 of the circulating water system 800. Thus, the liquid in the third heat exchange pipe 105 can circulate between the third heat exchange pipe 105 and the second heat exchange pipe 102. The circulating water can circulate between the fourth heat exchange pipe 106 and the circulating water system 800. That is, the circulating water can flow from the circulating water outlet 801 to the fourth heat exchange pipe 106, and then flow back to the circulating water inlet 802. It should be noted that the circulating water system 800 in this embodiment is a system capable of reusing cooling water or process water. Circulating water flowing out of the fourth heat exchange pipe 106 can flow back into the circulating water system 800. After being treated by the circulating water system 800, the circulating water will again flow out from the circulating water outlet 801 into the fourth heat exchange pipe 106 to reduce the liquid temperature within the fourth heat exchange pipe 106. This allows for water reuse. The fourth heat exchange pipe 106 can also exchange heat with the third heat exchange pipe 105, and the third heat exchange pipe 105 can exchange heat with the second heat exchange pipe 102. This more realistically simulates the engine's heat dissipation process under actual operating conditions, improving the accuracy of 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 of the third connecting pipe 107 is connected to the liquid outlet of the second heat exchange pipe 102, and the liquid outlet of the third connecting pipe 107 is connected to the liquid inlet of the third heat exchange pipe 105. The liquid inlet of the fourth connecting pipe 108 is connected to the liquid outlet of the third heat exchange pipe 105, and the liquid outlet of the fourth connecting pipe 108 is connected to the liquid inlet of the second heat exchange pipe 102. It is understood that the third connecting pipe 107 and the fourth connecting pipe 108 increase the liquid flow path, which is more conducive to heat exchange between the second heat exchange pipe 102 and the first heat exchange pipe 101 and the third heat exchange pipe 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 inlet end of the fifth connecting pipe 109 is connected to the outlet end of the fourth heat exchange pipe 106, and the outlet end of the fifth connecting pipe 109 is adapted to be connected to the circulating water inlet 802. The inlet end of the sixth connecting pipe 110 is adapted to be connected to the circulating water outlet 801, and the outlet end of the sixth connecting pipe 110 is connected to the inlet end of the fourth heat exchange pipe 106.
[0072] A temperature sensor 1000 is installed on either the first connecting pipe 200 or the second connecting pipe 300, allowing it to detect the coolant temperature within either pipe and obtain the current coolant temperature. A second valve 900 is installed on the fifth connecting pipe 109, and its opening is adjustable. It should be noted that because the opening of the second valve 900 is adjustable, its opening can be adjusted in a timely manner based on the current temperature detected by the temperature sensor 1000 and the target temperatures set by the tester for different engine operating environments. This allows for a more realistic simulation of the engine's actual operating environment, thereby improving the accuracy of the test results. It should be understood that the opening of the second valve 900 is related to the circulating water resistance. A smaller opening of the second valve 900 results in greater circulating water resistance, leading to a smaller flow rate of circulating water returning to the circulating water system 800, and consequently, a decrease in the cooling capacity of the circulating water in the fourth heat exchange pipe 106. Thus, the liquid temperature in the third heat exchange pipe 105, which exchanges heat with the fourth heat exchange pipe 106, will rise, thereby raising the liquid temperature in the second heat exchange pipe 102, which also exchanges heat with the third heat exchange pipe 105. This, in turn, causes the coolant temperature in the first heat exchange pipe 101, which exchanges heat with the second heat exchange pipe 102, to gradually rise to the target temperature. It should be understood that if the current temperature is higher than the target temperature, the opening of the second valve 900 should be increased to increase the circulating water flow rate and improve the cooling capacity of the circulating water until the coolant temperature in the first connecting pipe 200 drops to the target temperature.
[0073] In some embodiments, the bench test system further includes a controller 700, which is signal-connected to the temperature sensor 1000 and the second valve 900. It should be noted that this controller 700 and the controller 700 signal-connected to the flow detector 500 mentioned above can be the same controller 700, or they can be two different controllers 700. The controller 700 can be, for example, a PID controller (Proportional-Integral-Derivative controller), thereby enabling precise adjustment of the opening degree of the first valve 400 and the second valve 900. The second valve 900 can be, for example, an electrically controlled proportional valve. Signal or command transmission can occur between the second valve 900 and the controller 700, and signal or command transmission can also occur between the temperature sensor 1000 and the controller 700. Temperature sensor 1000 is used to send the detected current temperature of the coolant in the first connecting pipe 200 or the second connecting pipe 300 to controller 700. Controller 700 is used to control and adjust the opening of the second valve 900 based on the current temperature and the target temperature set by the tester corresponding to the actual operation of the engine under test conditions. It should be noted that the principle of increasing or decreasing the opening of the second valve 900 based on the comparison between the current temperature and the target temperature has been explained above, and therefore will not be repeated here.
[0074] In some embodiments, the bench test system further includes a water pump 1100, which is connected to a third connecting pipe 107 or a fourth connecting pipe 108. It should be noted that by providing the water pump 1100, the liquid flowing within the third connecting pipe 107 or the fourth connecting pipe 108 can be powered, thereby facilitating the flow of liquid between the second heat exchange pipe 102 and the third heat exchange pipe 105, and thus ensuring smooth heat exchange.
[0075] In some embodiments, the bench test system further includes an expansion tank 1200, which is connected to the exhaust port 603 of the engine under test and the second connecting pipe 300. It should be noted that the exhaust port 603 is connected to the coolant outlet 601 and the coolant inlet 602. The expansion tank 1200 is either the expansion tank on the vehicle to be installed on the engine under test 600 or an equivalent replacement with the same performance parameters as the vehicle's expansion tank. The expansion tank 1200 contains coolant, which enters the engine under test 600 sequentially through the expansion tank 1200, the second connecting pipe 300, and the coolant inlet 602, and then flows out through the coolant outlet 601. When coolant is injected into the engine under test 600, gas in the coolant flow channel of the engine under test 600 can also be discharged into the expansion tank 1200 through the exhaust port 603, thereby timely expelling residual gas in the engine under test 600 and ensuring the timely injection of coolant into the engine under test 600.
[0076] As can be seen from the above, the bench test system provided in this application embodiment can adjust the flow rate of the coolant in the pipeline or the flow rate of the circulating water used to cool the coolant in a timely manner by using the controller 700 according to the current flow rate and current temperature of the coolant. This allows for flexible and precise adjustment of the liquid flow rate and temperature in the coolant pipeline, thereby more realistically simulating the liquid flow rate and liquid temperature corresponding to the engine in the real operating environment. This improves the accuracy of the bench test results, and more accurate test results are more conducive to the test personnel to make accurate adjustments to the engine to improve its performance.
[0077] On the other hand, such as Figure 2 As shown, this application embodiment also provides a test method, which is applied to the bench test system of any of the above embodiments of this application. The test method can be executed by the controller 700 in the bench test system. The test method includes 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 traffic from the traffic detector 500 in real time or at preset intervals.
[0080] In step 102, the controller 700 determines the target flow adjustment command based on the current flow and the target flow.
[0081] The target flow rate adjustment command is used to instruct the opening degree of the first valve 400 to adjust the liquid flow rate 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 preset by the tester for the engine operating under the test conditions. It should be understood that different test conditions have corresponding target flow rates.
[0082] As can be seen from the above, by using the test method provided in the embodiments of this application, the flow rate of coolant flowing into the engine can be adjusted in a timely manner according to the current flow rate of coolant detected by the flow detector 500, thereby simulating the actual operating environment of the engine more realistically and improving the accuracy of the engine bench test results.
[0083] On the other hand, such as Figure 3 As shown, this application embodiment also provides a test method, which is applied to the bench test system of any of the above embodiments of this application. The test method can be executed by the controller 700 in the bench test system. The test method includes 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 embodiments of this application will not be described again here.
[0086] In step 202, the controller 700 determines the target flow adjustment command based on the current flow and the target flow.
[0087] The target flow rate adjustment command is used to instruct the opening of the first valve 400 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 a target flow rate adjustment command based on the current flow rate and the target flow rate, including: the controller 700 generating a first adjustment command in response to the current flow rate being less than the target flow rate. Based on the first adjustment command, the controller 700 controls the opening of the first valve 400 to be increased to a first target opening rate corresponding to the target flow rate. It should be noted that when the opening of the first valve 400 is the first target opening rate, the flow rate through the first valve 400 is the target flow rate. It is understood that by increasing the opening of the first valve 400, the flow rate of fluid allowed to pass through the first valve 400 can be increased, thereby increasing the coolant flow rate within the engine under test 600, to more realistically simulate the operating environment of the engine under test conditions, and thus improve the accuracy of the bench test results.
[0089] In some instances, controller 700 determines a target flow rate adjustment command based on the current flow rate and the target flow rate, including: controller 700 generating a third adjustment command in response to the current flow rate being less than the target flow rate. Based on the third adjustment command, 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 is understood that by reducing the opening of the first valve 400, the flow rate of fluid allowed through the first valve 400 is reduced, thereby reducing the coolant force flowing within the engine under test 600, to more realistically simulate the operating environment of the engine under test conditions, and thus improve the accuracy of bench test results.
[0090] In some embodiments, the controller 700 determines a target flow rate adjustment command based on the current flow rate and the target flow rate, including: the controller 700 controlling the opening of the first valve 400 to maintain a first target opening degree in response to the current flow rate equaling the target flow rate within a first preset time period. This allows for the simulation of an engine operating in a stable environment and accurate verification of engine performance.
[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 the target temperature adjustment command based on the current temperature and the target temperature.
[0094] The target temperature adjustment command instructs the opening degree of the second valve 900 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 preset target temperature for the engine under test conditions. It should be understood that different test conditions have corresponding target temperatures. By adjusting the current coolant temperature detected by the temperature sensor 1000, the coolant temperature in the engine can be adjusted in a timely manner, thereby more realistically simulating the engine's actual operating environment and state, and ultimately improving the accuracy of the engine bench test results.
[0095] In some embodiments, the controller 700 determines a target temperature adjustment command based on the current temperature and the target temperature, including: the controller 700 generating a second adjustment command in response to the current temperature being lower than the target temperature. Based on the second adjustment command, the controller 700 controls the opening of the second valve 900 to decrease to a second target opening corresponding to the target temperature. It should be noted that by decreasing the opening of the second valve 900, the cooling capacity of the circulating water in the fourth heat exchange pipe 106 can be reduced, thereby increasing the liquid temperature in the third heat exchange pipe 105. Consequently, the liquid temperature in the second heat exchange pipe 102, which exchanges heat with the third heat exchange pipe 105, will also increase, and thus the temperature of the coolant in the first heat exchange pipe 101, which exchanges heat with the second heat exchange pipe 102, will also increase. This allows for a more realistic simulation of the engine's operating environment and state under test conditions, thereby improving the accuracy of bench test results.
[0096] In some embodiments, the controller 700 determines a target temperature adjustment command based on the current temperature and the target temperature, including: the controller 700 generating a fourth adjustment command in response to the current temperature being greater than the target temperature. Based on the fourth adjustment command, the controller 700 controls the opening of the second valve 900 to be increased 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, thereby reducing the temperature of the coolant circulating inside the engine under test 600 through heat exchange in each heat exchange pipeline and by time-grounding, so as to more realistically simulate the operating environment of the engine under test conditions, thereby improving the accuracy of the bench test results.
[0097] In some embodiments, the controller 700 determines a target temperature adjustment command based on the current temperature and the target temperature, including: the controller 700 controlling the opening of the second valve 900 to maintain a second target opening degree in response to the current temperature equaling the target temperature within a second preset time period. This allows for the simulation of the engine operating in a stable environment and accurate verification of the engine's performance.
[0098] As can be seen from the above, the test method provided in this application embodiment can adjust the opening of the first valve 400 or the second valve 900 in a timely and flexible manner according to the current flow rate and temperature of the coolant in the engine under test, so as to more realistically simulate the operating state of the engine in a real operating environment. This can improve the accuracy of the bench test results.
[0099] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.
[0100] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.
Claims
1. A bench testing system, characterized in that, The bench test system 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). The heat exchange mechanism (100) includes a first heat exchange pipe (101) and a second heat exchange pipe (102) separated from each other, wherein the second heat exchange pipe (102) contains a heat exchange liquid, and the heat exchange liquid is adapted to exchange heat with circulating water; The inlet end of the first connecting pipe (200) is adapted to be connected to the coolant outlet (601) of the engine under test (600), and the outlet end of the first connecting pipe (200) is connected to the inlet end of the first heat exchange pipe (101). The liquid inlet of the second connecting pipe (300) is connected to the liquid outlet of the first heat exchange pipe (101), and the liquid outlet of the second connecting pipe (300) is adapted to be connected to the coolant inlet (602) of the engine under test (600), wherein the coolant outlet (601) is connected to 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; The heat exchange mechanism (100) includes a first heat exchanger (103) and a second heat exchanger (104). The first heat exchanger (103) includes the first heat exchange pipeline (101) and the second heat exchange pipeline (102). The second heat exchanger (104) includes a separated third heat exchange pipe (105) and a fourth heat exchange pipe (106). The liquid inlet of the third heat exchange pipe (105) is connected to the liquid outlet of the second heat exchange pipe (102). The liquid inlet of the fourth heat exchange pipe (106) is adapted to be connected to the circulating water outlet (801) of the circulating water system (800). The liquid outlet of the fourth heat exchange pipe (106) is adapted to be connected to the circulating water inlet (802) of the circulating water system (800).
2. The bench testing system according to claim 1, characterized in that, The bench test system also includes a controller (700), which is connected to the flow detector (500) and the first valve (400) respectively.
3. The bench testing system according to claim 1, characterized in that, The heat exchange mechanism (100) also includes a third connecting pipe (107) and a fourth connecting pipe (108). The liquid inlet of the third connecting pipe (107) is connected to the liquid outlet of the second heat exchange pipe (102), and the liquid outlet of the third connecting pipe (107) is connected to the liquid inlet of the third heat exchange pipe (105). The inlet end of the fourth connecting pipe (108) is connected to the outlet end of the third heat exchange pipe (105), and the outlet end of the fourth connecting pipe (108) is connected to the inlet end of the second heat exchange pipe (102).
4. The bench testing system according to claim 1, characterized in that, The bench test system also includes a second valve (900) and a temperature sensor (1000), and the heat exchange mechanism (100) also includes a fifth connecting pipe (109) and a sixth connecting pipe (110). The liquid inlet of the fifth connecting pipe (109) is connected to the liquid outlet of the fourth heat exchange pipe (106), and the liquid outlet of the fifth connecting pipe (109) is adapted to be connected to the circulating water inlet (802). The inlet end of the sixth connecting pipe (110) is adapted to be connected to the circulating water outlet (801), and the outlet end of the sixth connecting pipe (110) is connected to the inlet end of the fourth heat exchange pipe (106). The temperature sensor (1000) is mounted 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.
5. The bench testing system according to claim 4, characterized in that, The bench test system also includes a controller (700), which is connected to the temperature sensor (1000) and the second valve (900) respectively.
6. A test method, characterized in that, The method is applied to the bench test system according to any one of claims 1 to 5, and the test method includes: Obtain the current flow rate of the liquid in the first connecting pipe (200) or 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 the adjustment of the opening of the first valve (400) to adjust the liquid flow rate in the first connecting pipe (200) or the second connecting pipe (300) to the target flow rate.
7. The test method according to claim 6, characterized in that, The step of determining the target traffic adjustment instruction based on the current traffic and the target traffic includes: In response to the current flow being less than the target flow, a first adjustment command is generated; Based on the first adjustment command, the opening of the first valve (400) is increased to a first target opening corresponding to the target flow rate.
8. A test method, characterized in that, The method is applied to the bench test system according to any one of claims 4 to 5, and the test method includes: Obtain the current flow rate of the liquid in the first connecting pipe (200) or 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 the adjustment of the opening of the first valve (400) to adjust the liquid flow rate in the first connecting pipe (200) or the second connecting pipe (300) to the target flow rate; The step of determining the target traffic adjustment instruction based on the current traffic and the target traffic includes: In response to the current flow being less than the target flow, a first adjustment command is generated; Based on the first adjustment command, the opening of the first valve (400) is increased to a first target opening corresponding to the target flow rate; The method further includes: Obtain the current temperature of the liquid inside the first connecting tube (200) or the second connecting tube (300); Based on the current temperature and the target temperature, a target temperature adjustment command is determined, wherein the target temperature adjustment command is used to instruct the adjustment of the opening of the second valve (900) to adjust the temperature of the liquid in the first connecting pipe (200) or the second connecting pipe (300) to the target temperature.
9. The test method according to claim 8, characterized in that, The step of determining the target temperature adjustment command based on the current temperature and the target temperature includes: In response to the current temperature being lower than the target temperature, a second adjustment command is generated; Based on the second adjustment command, the opening of the second valve (900) is reduced to a second target opening corresponding to the target temperature.