Engine cooling system testing equipment

Abstract

This disclosure relates to a testing device for an engine cooling system, belonging to the field of engine technology. A heat exchanger has a first outlet connected to a first inlet, a second outlet connected to a second inlet, and the first outlet connected to a third inlet of the engine cooling system. A fourth inlet of a liquid supply module is connected to the second outlet via a pipe, and the fourth outlet of the liquid supply module is also connected to the second inlet via a pipe. A proportional valve has its two ends connected to the second outlet and the fourth inlet, respectively. A temperature measuring module measures the coolant temperature at the first outlet. A controller is electrically connected to the proportional valve and the temperature measuring module, and is used to acquire the temperature measured by the temperature measuring module and control the opening of the proportional valve based on the difference between the measured temperature and a preset temperature. Using this disclosure, the testing accuracy of the testing device can be improved during the development of an engine cooling system.

Description

Technical Field

[0001] This disclosure relates to the field of engine technology, and in particular to an engine cooling system testing device. Background Technology

[0002] The engine cooling system is a crucial component of an engine, used to control and regulate its temperature. As the engine operates under different conditions, the heat generated per unit time varies, requiring the cooling system to provide corresponding cooling capacity. The development of an engine cooling system necessitates the use of testing equipment connected to both the inlet and outlet of the cooling system. This equipment continuously supplies coolant to the system for a set duration and measures the coolant temperature at the inlet. The degree of deviation between this temperature and the set temperature is used to determine the suitability of the engine cooling system.

[0003] Currently, when testing engine cooling systems, the testing equipment delivers coolant to the engine cooling system at corresponding flow rates under different engine operating conditions to prevent the engine from overheating during operation.

[0004] However, changes in the coolant flow rate within the engine cooling system may cause turbulence within the system, leading to inaccurate test results from the testing equipment. Summary of the Invention

[0005] This disclosure provides an engine cooling system testing device that can solve the technical problems existing in related technologies. The technical solution is as follows:

[0006] This disclosure provides an engine cooling system testing device, which includes a heat exchanger, a liquid supply module, a proportional valve, a temperature measurement module, and a controller.

[0007] The heat exchanger includes a first liquid outlet, a first liquid inlet, a second liquid outlet, and a second liquid inlet. The first liquid outlet is connected to the first liquid inlet, and the second liquid outlet is connected to the second liquid inlet. The first liquid outlet is used to connect to the third liquid inlet of the engine cooling system, and the first liquid inlet is connected to the third liquid outlet of the engine cooling system.

[0008] The fourth liquid inlet of the liquid supply module is connected to the second liquid outlet through a pipe, and the fourth liquid outlet of the liquid supply module is connected to the second liquid inlet through a pipe.

[0009] The two ends of the proportional valve are respectively connected to the second liquid outlet and the fourth liquid inlet;

[0010] The temperature measuring module is used to measure the temperature of the coolant at the first outlet.

[0011] The controller is electrically connected to the proportional valve and the temperature measuring module, respectively, and is used to obtain the temperature measured by the temperature measuring module and control the opening degree of the proportional valve based on the difference between the temperature and the preset temperature.

[0012] In one possible implementation, the engine cooling system test equipment further includes a fluid replenishment module;

[0013] The air inlet of the fluid replenishment module is connected to the air outlet of the engine cooling system, and the third fluid inlet of the fluid replenishment module is connected to the first fluid outlet.

[0014] In one possible implementation, the engine cooling system test equipment further includes an electrically controlled tee pipe electrically connected to the controller, wherein the first connector of the electrically controlled tee pipe is electrically connected to the second liquid outlet, the second connector of the electrically controlled tee pipe is electrically connected to the fourth liquid inlet, and the third connector of the electrically controlled tee pipe is electrically connected to the fourth liquid outlet.

[0015] The proportional valve is located inside the electrically controlled tee pipe, and its two ends are respectively connected to the first connector and the second connector;

[0016] The controller is used to control the third connector to connect to the second connector or the first connector based on the difference.

[0017] In one possible implementation, the liquid supply module includes a liquid storage tank, a pump body, and a cooling fan. The liquid storage tank has a fourth liquid outlet and a fourth liquid inlet. The two ends of the pump body are respectively connected to the second liquid inlet and the fourth liquid outlet. The cooling fan is used to cool the coolant in the liquid storage tank.

[0018] The controller is electrically connected to the pump body and the cooling fan respectively, and is used to determine the first target speed and the second target speed corresponding to the target value range to which the difference belongs in the pre-stored correspondence between the numerical range of the difference and the speed, control the pump body to run at the first target speed, and control the cooling fan to run at the second target speed.

[0019] In one possible implementation, the heat exchanger has a plurality of first flow channels and a plurality of second flow channels. The two ends of the first flow channels are respectively connected to the first liquid outlet and the first liquid inlet, and the two ends of the second flow channels are respectively connected to the second liquid outlet and the second liquid inlet. Each first flow channel is arranged opposite to one second flow channel.

[0020] In one possible implementation, the engine cooling system test equipment further includes a flow detection module, which is electrically connected to the controller and has its two ends connected to the second liquid outlet and the second liquid inlet, respectively.

[0021] In one possible implementation, both the flow detection module and the proportional valve are rated at 24V.

[0022] In one possible implementation, the engine cooling system test equipment further includes a set of movable wheels that are detachably connected to the heat exchanger.

[0023] In one possible implementation, the temperature measurement module is a PT100 temperature sensor.

[0024] In one possible implementation, the coolant is a mixture of water and ethylene glycol, wherein the volume percentage of ethylene glycol in the mixture is 53%.

[0025] The technical solutions provided by the embodiments of this disclosure have at least the following beneficial effects:

[0026] This disclosure provides an engine cooling system testing device. Two independent circulating coolant paths are formed between the heat exchanger and the engine cooling system, and between the heat exchanger and the coolant supply module. The flow rates of these two circulating coolant paths do not affect each other. The controller adjusts the opening of a proportional valve based on the difference between the temperature at the first outlet of the heat exchanger and a preset temperature, thereby adjusting the heat exchange efficiency of the two circulating coolant paths. This achieves controlled adjustment of the coolant temperature within the engine cooling system. Throughout the adjustment process, the flow rate within the engine cooling system remains almost unchanged, avoiding turbulence within the engine cooling system and thus improving the testing accuracy of the device.

[0027] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this disclosure, 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 disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of an engine cooling system testing device shown in an embodiment of this disclosure;

[0030] Figure 2This is a schematic diagram of the structure of an engine cooling system testing device shown in an embodiment of this disclosure;

[0031] Figure 3 This is a circuit diagram of an engine cooling system testing device shown in an embodiment of the present disclosure;

[0032] Figure 4 This is a circuit diagram of an engine cooling system testing device shown in an embodiment of this disclosure.

[0033] Legend

[0034] 100. Engine cooling system; 101. Third liquid outlet; 102. Third liquid inlet; 103. Air outlet;

[0035] 1. Heat exchanger;

[0036] 11. First liquid outlet; 12. First liquid inlet; 13. Second liquid outlet; 14. Second liquid inlet;

[0037] 2. Liquid supply module;

[0038] 21. Fourth liquid outlet; 22. Fourth liquid inlet;

[0039] 3. Proportional valve;

[0040] 4. Temperature measurement module;

[0041] 5. Controller;

[0042] 6. Fluid replenishment module;

[0043] 61. Air inlet; 62. Fifth liquid outlet;

[0044] 7. Electrically controlled tee tube;

[0045] 71. First connector; 72. Second connector; 73. Third connector;

[0046] 8. Traffic flow detection module;

[0047] 9. Mobility wheel set;

[0048] 10. Liquid level sensor;

[0049] 20. Alarm module. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0051] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar terms used in this patent disclosure and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0052] This disclosure provides an engine cooling system testing device for testing various performance aspects of the engine cooling system during the design and development process. Figure 1 This is a schematic diagram of the structure of an engine cooling system testing device provided in an embodiment of this disclosure, as shown below. Figure 1 As shown, the engine cooling system test equipment includes a heat exchanger 1, a liquid supply module 2, a proportional valve 3, a temperature measurement module 4, and a controller 5.

[0053] The heat exchanger 1 includes a first outlet 11, a first inlet 12, a second outlet 13, and a second inlet 14. The first outlet 11 is connected to the first inlet 12, and the second outlet 13 is connected to the second inlet 14. The first outlet 11 is connected to the third inlet 102 of the engine cooling system 100, and the first inlet 12 is connected to the third outlet 101 of the engine cooling system 100. The fourth inlet 22 of the liquid supply module 2 is connected to the second outlet 13 via a pipe, and the fourth outlet 21 of the liquid supply module 2 is connected to the second inlet 14 via a pipe. The two ends of the proportional valve 3 are connected to the second outlet 13 and the fourth inlet 22, respectively. The temperature measuring module 4 is used to measure the coolant temperature at the first outlet 11. The controller 5 is electrically connected to the proportional valve 3 and the temperature measuring module 4, respectively, and is used to acquire the temperature measured by the temperature measuring module 4 and control the opening degree of the proportional valve 3 based on the difference between the temperature and the preset temperature.

[0054] In this way, two independent circulating coolant paths are formed between heat exchanger 1 and engine cooling system 100, and between heat exchanger 1 and coolant supply module 2 (for ease of explanation, the circulating coolant path between heat exchanger 1 and engine cooling system 100 is referred to as the first circulating coolant path, and the circulating coolant path between heat exchanger 1 and coolant supply module 2 is referred to as the second circulating coolant path). The flow rates of these two circulating coolant paths do not affect each other. Controller 5 adjusts the opening of proportional valve 3 according to the difference between the temperature of the first outlet 11 of heat exchanger 1 and the preset temperature, thereby adjusting the heat exchange efficiency of the two circulating coolant paths and controlling the coolant temperature in the engine cooling system. During the entire adjustment process, the flow rate in the engine cooling system remains almost unchanged, which avoids turbulence inside the engine cooling system and thus improves the testing accuracy of the testing equipment.

[0055] In some possible embodiments, the temperature measuring module 4 is a temperature sensor, specifically, the temperature measuring module 4 may be a PT100 temperature sensor.

[0056] Specifically, the first liquid inlet 12 of the heat exchanger 1 and the third liquid outlet 101 of the engine cooling system 100 can be connected by a pipe. A temperature sensor can be installed inside the pipe connecting the first liquid inlet 12 and the third liquid outlet 101. The temperature sensor is electrically connected to the controller 5 and is used to send the detected temperature value to the controller 5.

[0057] The pipe connecting the first inlet 12 and the third outlet 101 can be a steel pipe or an aluminum pipe, and this embodiment does not limit the type of pipe. The inner wall cross-section of the pipe can be circular to avoid turbulence inside the pipe.

[0058] In one example, the temperature measuring module 4 sends the temperature value at the third outlet 101 to the controller 5 according to a preset cycle. The specific value of the preset cycle can be set by the technician according to actual needs, such as 0.5 seconds, 1 second, 2 seconds, etc., and this embodiment does not limit it.

[0059] In implementation, controller 5 can pre-store multiple preset temperatures. For example, controller 5 can pre-store a first preset temperature, a second preset temperature, and a third preset temperature. The first preset temperature corresponds to the engine's first operating condition, the second preset temperature corresponds to the engine's second operating condition, and the third preset temperature corresponds to the engine's third operating condition. The first, second, and third operating conditions can be the engine's low-speed, medium-speed, and high-speed operating conditions, respectively. The correspondence between engine operating conditions and preset temperatures is shown in Table 1. Table 1 is only an example; in actual implementation, relevant technical personnel can set the preset temperatures themselves.

[0060] Table 1

[0061] Operating conditions Preset temperature (°C) Low-speed operating conditions 80 Medium-speed operating conditions 105 High-speed operating conditions 120

[0062] In implementation, the controller 5 can be electrically connected to the gear shifter. The controller 5 can control the engine to operate under the different operating conditions mentioned above through the gear shifter. Then, the controller 5 periodically acquires the temperature measured by the temperature measuring module 4 and compares the temperature with the target preset temperature corresponding to the current operating condition. It determines the difference between the temperature and the target preset temperature. When the difference between the temperature and the target preset temperature is positive (i.e., the temperature at the third outlet 101 is greater than the target preset temperature corresponding to the current operating condition), the controller 5 increases the opening of the proportional valve 3, thereby increasing the coolant flow rate between the second outlet 13 and the second inlet 14, increasing the heat exchange efficiency between the first and second circulating coolant circuits, and reducing the coolant temperature in the engine cooling system. Correspondingly, when the difference between the temperature and the target preset temperature is negative (i.e., the temperature at the third outlet 101 is less than the target preset temperature corresponding to the current operating condition), the controller 5 reduces the opening of the proportional valve 3, thereby reducing the coolant flow rate between the second outlet 13 and the second inlet 14, reducing the heat exchange efficiency between the first and second circulating coolant circuits, and thus increasing the coolant temperature in the engine cooling system.

[0063] For example, controller 5 controls the engine to operate at medium speed via a gear shifter, and periodically obtains the temperature at the third outlet 101 from temperature sensing module 4, determining the target preset temperature corresponding to medium speed operation to be 80°C. If the temperature obtained by controller 5 from temperature sensing module 4 is 84°C, the difference between this temperature and the target preset temperature is positive, controller 5 increases the opening of proportional valve 3, thereby increasing the coolant flow rate between the second outlet 13 and the second inlet 14, increasing the heat exchange efficiency between the first and second circulating coolant paths, and thus reducing the coolant temperature in the engine cooling system.

[0064] In one example, controller 5 determines the difference between the temperature measured by temperature sensing module 4 and the target preset temperature. Based on the pre-stored correspondence between the numerical range of this difference and the target value for unit opening adjustment, controller 5 determines the target value for unit opening adjustment corresponding to the target numerical range of the difference, and controls the opening of proportional valve 3 to increase or decrease the target value for unit opening adjustment. This allows for rapid adjustment of the coolant temperature in the engine cooling system.

[0065] In implementation, controller 5 can pre-store multiple target values ​​for unit opening adjustment. These opening percentages can be 1%, 1.5%, 2%, 2.5%, and 3%. Each opening adjustment corresponds to a target range of difference values. The correspondence between the target range of difference values ​​and the target values ​​for unit opening adjustment is shown in Table 2. Table 2 is only an example; in actual implementation, relevant technical personnel can set it themselves.

[0066] Table 2

[0067] The numerical range of the difference (°C) Target value for unit opening adjustment (%) 1～3 1 3～5 1.5 5～7 2 7～9 2.5 9～11 3

[0068] Understandably, in this example, if the controller 5 determines that the absolute value of the difference between the temperature measured by the temperature measuring module 4 and the target preset temperature is less than 1°C, the controller 5 can determine that the coolant inside the engine cooling system does not need to be adjusted in temperature. Accordingly, the controller 5 does not adjust the opening of the proportional valve 3.

[0069] In some possible embodiments, the engine cooling system test equipment also includes a fluid replenishment module 6.

[0070] See Figure 1 The air inlet 61 of the fluid replenishment module 6 is connected to the air outlet 103 of the engine cooling system 100, and the fifth liquid outlet 62 of the fluid replenishment module 6 is connected to the third liquid inlet 102.

[0071] The replenishment module 6 can be a tank with an air inlet 61 and a fifth liquid outlet 62. The air inlet 61 can be connected to the air outlet 103 of the engine cooling system 100 through a pipe. The third liquid inlet 102 and the first liquid outlet 11 can be connected through a pipe. The fifth liquid outlet 62 of the replenishment module 6 can be connected to the pipe connecting the third liquid inlet 102 and the first liquid outlet 11 through a pipe, so that the fifth liquid outlet 62 is connected to the third liquid inlet 102.

[0072] The air inlet 61 can be located on the inner wall of the tank, and the fifth liquid outlet 62 can be located on the bottom wall of the tank. A condenser plate can be installed on the top inner wall of the tank. The connection between the condenser plate and the inner wall of the tank can be welding or threaded connection, and this embodiment does not limit the method. The tank can be a cylindrical structure to avoid coolant accumulation in the replenishment module 6.

[0073] In some possible embodiments, the engine cooling system test equipment also includes an electrically controlled tee 7 electrically connected to the controller 5.

[0074] See Figure 2The electrically controlled three-way pipe 7 has a first connector 71, a second connector 72, and a third connector 73 that are interconnected. The first connector 71 of the electrically controlled three-way pipe 7 is electrically connected to the second liquid outlet 13, the second connector 72 of the electrically controlled three-way pipe 7 is electrically connected to the fourth liquid inlet 22, and the third connector 73 of the electrically controlled three-way pipe 7 is electrically connected to the fourth liquid outlet 21. The proportional valve 3 is located inside the electrically controlled three-way pipe 7, and its two ends are connected to the first connector 71 and the second connector 72, respectively.

[0075] The controller 5 is used to control the connection between the third connector 73 and the second connector 72 or the first connector 71 based on the difference.

[0076] In implementation, controller 5 pre-stores a difference threshold. Controller 5 periodically acquires the temperature measured by temperature sensing module 4 and compares this temperature with the target preset temperature corresponding to the current operating condition, determining the difference between the two. Controller 5 then compares this difference with the difference threshold. If the difference is greater than the threshold, the coolant temperature in the engine cooling system is significantly different from the stable temperature under the current operating condition. Controller 5 then connects the first connector 71 and the second connector 72 and controls the opening of the proportional valve 3. Detailed instructions on adjusting the opening of the proportional valve 3 can be found above and will not be repeated here. Conversely, if the difference is less than the threshold, the coolant temperature in the engine cooling system is less different from the stable temperature under the current operating condition. Controller 5 then connects the third connector 73 and the second connector 72, allowing the coolant to flow directly from the fourth outlet 21 to the fourth inlet 22 without passing through heat exchanger 1. This extends the service life of heat exchanger 1.

[0077] For example, the difference threshold can be 1℃ to 3℃, specifically 3℃.

[0078] In some possible embodiments, the liquid supply module 2 includes a liquid storage tank, a pump body, and a cooling fan.

[0079] In one example, the storage tank has a fourth outlet 21 and a fourth inlet 22. The pump body is connected to the second inlet 14 and the fourth outlet 21 at both ends, respectively. A cooling fan is used to cool the coolant in the storage tank. The controller 5 is electrically connected to the pump body and the cooling fan, and is used to determine the first target speed and the second target speed corresponding to the target value range to which the difference belongs, based on a pre-stored correspondence between the numerical range of the difference and the speed. The controller then controls the pump body to operate at the first target speed and the cooling fan to operate at the second target speed.

[0080] This improves the heat dissipation efficiency of the liquid supply module 2, reduces the temperature of the coolant in the second circulation coolant circuit, and thus improves the heat exchange efficiency between the first and second circulation coolant circuits.

[0081] In some possible embodiments, the heat exchanger 1 has a plurality of first flow channels and a plurality of second flow channels. The two ends of the first flow channels are connected to the first liquid outlet 11 and the first liquid inlet 12, respectively. The two ends of the second flow channels are connected to the second liquid outlet 13 and the second liquid inlet 14, respectively. Each first flow channel is arranged opposite to one second flow channel.

[0082] Optionally, each first flow channel can be distributed in a double helix pattern corresponding to a second flow channel. This can improve the heat exchange efficiency between the first and second circulating coolant paths.

[0083] In some possible embodiments, the coolant is a mixture of water and ethylene glycol. In the coolant, ethylene glycol comprises 53% by volume, and water comprises 47% by volume.

[0084] In some possible embodiments, see Figure 2 The engine cooling system test equipment also includes a movable wheel set 9, which is detachably connected to the heat exchanger 1.

[0085] The movable wheel set 9 can be located below the heat exchanger 1. The connection between the heat exchanger 1 and the movable wheel set 9 can be a snap-fit ​​connection or a threaded connection. This embodiment does not limit the connection in this respect.

[0086] In some possible embodiments, the engine cooling system test equipment also includes a liquid level sensor 10 and an alarm module 20, with the controller 5 electrically connected to the liquid level sensor 10 and the alarm module 20, respectively.

[0087] See Figure 2 The engine cooling system testing equipment includes two liquid level sensors 10. One liquid level sensor 10 is located on a first pipe connecting a third outlet 101 and a first inlet 12, used to detect the first liquid level height of the coolant in the first pipe and send the first liquid level height to the controller 5. The other liquid level sensor 10 is located on a second pipe connecting a third inlet and a first outlet 11, used to detect the second liquid level height of the coolant in the second pipe and send the second liquid level height to the controller 5. The controller 5 is used to trigger the alarm module 20 to operate when either the first liquid level height or the second liquid level height is less than a preset height threshold, and to switch the engine to idle speed via the gear shifter.

[0088] During implementation, when testing the engine during the design process, the testing process may last for dozens or even hundreds of hours. Technicians cannot monitor the coolant level in the engine cooling system throughout the entire process. Therefore, the coolant level sensor 10 and alarm module 20 can be used to monitor the coolant level in the engine cooling system, reducing the monitoring difficulty for technicians.

[0089] In one example, alarm module 20 is an audible and visual alarm.

[0090] Optionally, the alarm module 20 is communicatively connected to the control terminal. When the controller 5 triggers the operation of the alarm module 20, the alarm module 20 sounds an alarm bell and flashes a light. At the same time, the alarm module 20 sends an alarm notification message to the control terminal.

[0091] In some possible embodiments, the engine cooling system test equipment also includes a flow detection module 8, see [link to relevant documentation]. Figure 3 The flow detection module 8 is electrically connected to the controller 5, and its two ends are respectively connected to the second liquid outlet 13 and the second liquid inlet 14.

[0092] The flow detection module 8 can be a flow meter, which is electrically connected to the controller 5. The flow meter can periodically detect the coolant flow between the second outlet 13 and the second inlet 14 and send the coolant flow to the controller 5. The controller 5 stores the coolant flow to form engine cooling system flow data. This engine cooling system flow data is used by technicians to analyze the flow stability of the engine cooling system currently being tested.

[0093] Optionally, see Figure 4 Both the flow detection module 8 and the proportional valve 3 have a rated voltage of 24V. This improves the operational safety of the engine cooling system testing equipment.

[0094] The technical solutions provided by the embodiments of this disclosure have at least the following beneficial effects:

[0095] This disclosure provides an engine cooling system testing device for testing various performance aspects of the engine cooling system during the design and development process. Figure 1 This is a schematic diagram of the structure of an engine cooling system testing device provided in an embodiment of this disclosure, as shown below. Figure 1 As shown, the engine cooling system test equipment includes a heat exchanger 1, a liquid supply module 2, a proportional valve 3, a temperature measurement module 4, and a controller 5.

[0096] The heat exchanger 1 includes a first outlet 11, a first inlet 12, a second outlet 13, and a second inlet 14. The first outlet 11 is connected to the first inlet 12, and the second outlet 13 is connected to the second inlet 14. The first outlet 11 is connected to the third inlet 102 of the engine cooling system 100, and the first inlet 12 is connected to the third outlet 101 of the engine cooling system 100. The fourth inlet 22 of the liquid supply module 2 is connected to the second outlet 13 via a pipe, and the fourth outlet 21 of the liquid supply module 2 is connected to the second inlet 14 via a pipe. The two ends of the proportional valve 3 are connected to the second outlet 13 and the fourth inlet 22, respectively. The temperature measuring module 4 is used to measure the coolant temperature at the first outlet 11. The controller 5 is electrically connected to the proportional valve 3 and the temperature measuring module 4, respectively, and is used to acquire the temperature measured by the temperature measuring module 4 and control the opening degree of the proportional valve 3 based on the difference between the temperature and the preset temperature.

[0097] In this way, two independent circulating coolant paths are formed between heat exchanger 1 and engine cooling system 100, and between heat exchanger 1 and coolant supply module 2 (for ease of explanation, the circulating coolant path between heat exchanger 1 and engine cooling system 100 is referred to as the first circulating coolant path, and the circulating coolant path between heat exchanger 1 and coolant supply module 2 is referred to as the second circulating coolant path). The flow rates of these two circulating coolant paths do not affect each other. Controller 5 adjusts the opening of proportional valve 3 according to the difference between the temperature of the first outlet 11 of heat exchanger 1 and the preset temperature, thereby adjusting the heat exchange efficiency of the two circulating coolant paths and controlling the coolant temperature in the engine cooling system. During the entire adjustment process, the flow rate in the engine cooling system remains almost unchanged, which avoids turbulence inside the engine cooling system and thus improves the testing accuracy of the testing equipment.

[0098] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. An engine cooling system testing device, characterized in that, The engine cooling system test equipment includes a heat exchanger (1), a liquid supply module (2), a proportional valve (3), a temperature measuring module (4), a controller (5), and an electrically controlled three-way pipe (7) electrically connected to the controller (5). The heat exchanger (1) includes a first liquid outlet (11), a first liquid inlet (12), a second liquid outlet (13), and a second liquid inlet (14). The first liquid outlet (11) is connected to the first liquid inlet (12), and the second liquid outlet (13) is connected to the second liquid inlet (14). The first liquid outlet (11) is used to connect to the third liquid inlet (102) of the engine cooling system (100), and the first liquid inlet (12) is used to connect to the third liquid outlet (101) of the engine cooling system (100). The heat exchanger (1) has multiple first flow channels and multiple second flow channels. The two ends of the first flow channels are connected to the first liquid outlet (11) and the first liquid inlet (12) respectively, and the two ends of the second flow channels are connected to the second liquid outlet (13) and the second liquid inlet (14) respectively. Each first flow channel is arranged opposite to one second flow channel. The liquid supply module (2) includes a liquid storage tank, a pump body and a cooling fan. The liquid storage tank has a fourth liquid outlet (21) and a fourth liquid inlet (22). The fourth liquid inlet (22) is connected to the second liquid outlet (13) through a pipe. The fourth liquid outlet (21) is connected to the second liquid inlet (14) through a pipe. The two ends of the pump body are connected to the second liquid inlet (14) and the fourth liquid outlet (21) respectively. The cooling fan is used to cool the coolant in the liquid storage tank. The first connector (71) of the electrically controlled three-way pipe (7) is electrically connected to the second liquid outlet (13), the second connector (72) of the electrically controlled three-way pipe (7) is electrically connected to the fourth liquid inlet (22), and the third connector (73) of the electrically controlled three-way pipe (7) is electrically connected to the fourth liquid outlet (21). The proportional valve (3) is located inside the electrically controlled three-way pipe (7), and the two ends of the proportional valve (3) are respectively connected to the first connector (71) and the second connector (72); The temperature measuring module (4) is used to measure the temperature of the coolant at the first outlet (11); The controller (5) is electrically connected to the proportional valve (3), the temperature measuring module (4), the pump body, and the cooling fan, respectively, for: The temperature measured by the temperature measuring module (4) is obtained, and the opening degree of the proportional valve (3) is controlled based on the difference between the temperature and the preset temperature, so as to connect the third connector (73) to the second connector (72) or the first connector (71). Based on the pre-stored correspondence between the numerical range of the difference and the rotational speed, a first target rotational speed and a second target rotational speed corresponding to the target numerical range to which the difference belongs are determined. The pump body is controlled to run at the first target rotational speed, and the cooling fan is controlled to run at the second target rotational speed.

2. The engine cooling system testing equipment according to claim 1, characterized in that, The engine cooling system test equipment also includes a fluid replenishment module (6). The air inlet (61) of the liquid replenishment module (6) is connected to the air outlet (103) of the engine cooling system (100), and the fifth liquid outlet (62) of the liquid replenishment module (6) is connected to the third liquid inlet (102).

3. The engine cooling system testing equipment according to claim 1, characterized in that, The engine cooling system test equipment also includes a flow detection module (8), which is electrically connected to the controller (5) and its two ends are respectively connected to the second liquid outlet (13) and the second liquid inlet (14).

4. The engine cooling system testing equipment according to claim 3, characterized in that, The rated voltage of both the flow detection module (8) and the proportional valve (3) is 24V.

5. The engine cooling system testing equipment according to claim 1, characterized in that, The engine cooling system test equipment also includes a set of movable wheels (9), which is detachably connected to the heat exchanger (1).

6. The engine cooling system testing equipment according to claim 1, characterized in that, The temperature measurement module (4) is a PT100 temperature sensor.

7. The engine cooling system testing equipment according to any one of claims 1 to 6, characterized in that, The coolant is a mixture of water and ethylene glycol, wherein the volume percentage of ethylene glycol in the mixture is 53%.

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