Engine oil temperature control system

Abstract

The utility model relates to the technical field of engine bench tests, and discloses an engine oil temperature control system, which comprises an oil pumping pipeline, a first heat exchanger, an oil return pipeline, a three-way proportional valve, a first temperature sensor and a PID (Proportion Integration Differentiation) module, the three-way proportional valve is provided with a first inlet, a second inlet and a first outlet, the three-way proportional valve is connected to the oil return pipeline in series through the first inlet and the first outlet, and a first branch pipe is arranged between the oil pumping pipeline and the second inlet of the three-way proportional valve; the first temperature sensor is arranged on an engine sump and used for monitoring the temperature of engine oil in the engine sump. The PID module is arranged to be capable of adjusting the valve opening degree of a second inlet of the three-way proportional valve according to the temperature, detected by the first temperature sensor, of the engine oil. According to the engine oil temperature control system, the engine oil temperature can be adjusted more quickly, and the control precision of the engine oil temperature can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of engine bench tests, and particularly relates to an engine oil temperature control system. Background Art

[0002] Engine bench tests refer to the testing and evaluation of various performance parameters of an engine on a specially designed test bench. This test method can simulate various states of the engine during actual operation, such as operating states at different speeds and loads, in order to comprehensively understand the performance and potential problems of the engine. For some specific test cycle conditions, such as the cold and hot shock test of the engine, in order to avoid the engine oil temperature being too high and affecting the test effect, it is necessary to control the engine oil temperature.

[0003] Related technologies, such as the Chinese utility model patent with the publication number of "CN 210370836 U", disclose an automatic engine oil temperature regulating device. It draws out the engine oil in the engine oil pan, cools it through a heat exchanger and then returns it to the engine oil pan. During the process of regulating the oil temperature, the actual flow rate of the cooling water flowing into the heat exchanger is controlled by a proportional valve to achieve the automatic regulation of the oil temperature. However, such a method is difficult to ensure the control accuracy of the oil temperature.

[0004] Another example is the Chinese invention patent with the publication number of "CN 116696509 A", which discloses a control system and method for engine oil temperature in cold and hot shock tests. This control system controls the flow direction and flow rate of the high-temperature engine oil pumped out from the oil pan through a temperature control proportional valve. Specifically, the temperature control proportional valve controls the first outlet and the second outlet. Part of the high-temperature engine oil is flowed into the engine oil cooling module through the fifth engine oil pipeline through the first outlet for cooling, and part of the high-temperature engine oil is flowed into the engine oil pan through the fourth engine oil pipeline through the second outlet. In this technical solution, the temperature control proportional valve needs to control the flow rates of two outlets, with a complex internal structure and control logic, a long response time, and it is easy to have the problem of inaccurate flow distribution, resulting in the adjustment of the engine oil temperature being difficult to meet the actual requirements. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the defect of low control accuracy existing in the existing engine oil temperature control technology, and provide an engine oil temperature control system.

[0006] To achieve the above purpose, the utility model provides an engine oil temperature control system, including an oil pumping pipeline, a first heat exchanger, an oil return pipeline, a three-way proportional valve, a first temperature sensor and a PID module; the oil pumping pipeline is used to transport the engine oil in the engine oil pan to the first heat exchanger for heat exchange with the circulating medium, and then transport it back to the engine oil pan through the oil return pipeline;

[0007] The three-way proportional valve has a first inlet, a second inlet, and a first outlet. The three-way proportional valve is connected in series to the oil return pipeline through the first inlet and the first outlet, and a first branch pipe is provided between the oil pumping pipeline and the second inlet of the three-way proportional valve.

[0008] The first temperature sensor is arranged on the engine oil pan to monitor the temperature of the engine oil in the engine oil pan. The PID module is configured to adjust the valve opening degree of the second inlet of the three-way proportional valve according to the temperature of the engine oil detected by the first temperature sensor, so as to adjust the amount of engine oil transported from the oil pumping pipeline to the oil return pipeline through the first branch pipe.

[0009] Preferably, an oil pump is arranged on the oil pumping pipeline, and the oil pump is used to provide power to pump out the engine oil in the engine oil pan.

[0010] Preferably, a pressure gauge is arranged on the oil outlet side of the three-way proportional valve of the oil return pipeline. A second branch pipe is provided between the oil inlet side of the oil pump on the oil pumping pipeline and the oil outlet side of the three-way proportional valve of the oil return pipeline, and a regulating valve is arranged on the second branch pipe to regulate the oil flow rate in the second branch pipe.

[0011] Preferably, an oil filter is arranged on the oil pumping pipeline and / or the oil return pipeline, and the oil filter is used to filter the engine oil.

[0012] Preferably, an oil suction hose is connected to the engine oil pan, and the oil suction hose is connected to the oil pumping pipeline through a quick connector.

[0013] Preferably, an oil return hose is connected to the engine oil pan, and the oil return hose is connected to the oil return pipeline through a quick connector.

[0014] Preferably, a fueling pipe is arranged on the oil pumping pipeline, and the fueling pipe is used to fill engine oil into the oil pumping pipeline. A first control valve is arranged on the fueling pipe to control the on-off of the fueling pipe.

[0015] Preferably, the oil pumping pipeline is connected to the bottom of the engine oil pan, and the oil return pipeline is connected to the upper middle part of the engine oil pan.

[0016] Preferably, the engine oil temperature control system further includes a heating assembly. The heating assembly includes a second heat exchanger, a heating unit, and a circulation pipeline. The circulation pipeline is arranged between the second heat exchanger and the heating unit, and a circulation pump is arranged on the circulation pipeline to drive the heat exchange medium to flow between the heating unit and the second heat exchanger.

[0017] The second heat exchanger is used to perform heat exchange between at least part of the engine oil and the heat exchange medium in the circulation pipeline, and to transport the engine oil after heat exchange to the second inlet of the three-way proportional valve.

[0018] Preferably, the heating assembly further includes a second temperature sensor and an FDV module. The second temperature sensor is arranged on the circulation pipeline to detect the temperature of the heat exchange medium in the circulation pipeline, and the FDV module is arranged to control the opening or closing of the heating unit according to the temperature of the heat exchange medium detected by the second temperature sensor.

[0019] Through the above technical solution, by arranging a three-way proportional valve with a first inlet, a second inlet and a first outlet on the oil return pipeline, and arranging a first branch pipe between the oil pumping pipeline and the second inlet of the three-way proportional valve, by monitoring the temperature of the engine oil in the engine oil pan through the first temperature sensor arranged on the engine oil pan, the PID module adjusts the valve opening of the second inlet of the three-way proportional valve according to the engine oil temperature detected by the first temperature sensor, and further adjusts the amount of engine oil directly transported from the oil pumping pipeline to the oil return pipeline through the first branch pipe. By controlling the amount of this part of the engine oil, the amount of engine oil entering the first heat exchanger for heat exchange with the circulating medium is controlled, and further the adjustment control of the engine oil temperature is realized.

[0020] Compared with the prior art, since only part of the engine oil is introduced into the first heat exchanger for heat exchange treatment in the present invention, the adjustment of the engine oil temperature can be realized faster, and the adjustment accuracy of the engine oil temperature can be ensured; in addition, since the present invention arranges a three-way proportional valve in the form of two inlets and one outlet on the oil return pipeline, when adjusting the flow rate of the engine oil entering the first heat exchanger, only the valve opening of the second inlet of the three-way proportional valve needs to be adjusted, which is simple and convenient; the fluid mixing effect of the three-way proportional valve in the form of two inlets and one outlet can make the engine oil that has undergone heat exchange treatment in the first heat exchanger and the engine oil that enters through the second inlet and has not undergone heat exchange treatment be evenly mixed, ensuring that the engine oil transported back to the engine oil pan through the oil return pipeline has a uniform temperature, and further ensuring that the first temperature sensor can accurately monitor the engine oil temperature in the engine oil pan, ensuring that the PID module can accurately adjust the valve opening of the second inlet, and further ensuring the control accuracy of the engine oil temperature. Description of the Drawings

[0021] Figure 1 is a schematic diagram of an engine oil temperature control system provided by the present invention;

[0022] Figure 2 is a schematic diagram of another engine oil temperature control system provided by the present invention.

[0023] Description of the Reference Numerals

[0024] 1. Engine oil pan; 101. Oil suction hose; 102. Oil return hose; 103. Quick connector; 10. Oil suction pipeline; 11. First branch pipe; 12. Oil pump; 13. Second branch pipe; 131. Regulating valve; 14. Oil filter; 15. Fueling pipe; 151. First control valve; 20. First heat exchanger; 30. Oil return pipeline; 31. Pressure gauge; 40. Three-way proportional valve; 401. First inlet; 402. Second inlet; 403. First outlet; 50. First temperature sensor; 60. PID module; 70. Heating assembly; 71. Second heat exchanger; 72. Heating unit; 73. Circulation pipeline; 74. Circulation pump; 75. Second temperature sensor; 76. FDV module. Specific embodiments

[0025] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not intended to limit the present invention.

[0026] As Figure 1 shown, the present invention provides an engine oil temperature control system, including an oil suction pipeline 10, a first heat exchanger 20, an oil return pipeline 30, a three-way proportional valve 40, a first temperature sensor 50 and a PID module 60; the oil suction pipeline 10 is used to transport the engine oil in the engine oil pan 1 to the first heat exchanger 20 for heat exchange with the circulating medium, and then transport it back to the engine oil pan 1 through the oil return pipeline 30; the three-way proportional valve 40 has a first inlet 401, a second inlet 402 and a first outlet 403, and the three-way proportional valve 40 is connected in series to the oil return pipeline 30 through the first inlet 401 and the first outlet 403, and a first branch pipe 11 is provided between the oil suction pipeline 10 and the second inlet 402 of the three-way proportional valve 40; the first temperature sensor 50 is provided on the engine oil pan 1 to monitor the temperature of the engine oil in the engine oil pan 1, and the PID module 60 is configured to adjust the valve opening of the second inlet 402 of the three-way proportional valve 40 according to the temperature of the engine oil detected by the first temperature sensor 50, so as to adjust the amount of engine oil transported from the oil suction pipeline 10 to the oil return pipeline 30 through the first branch pipe 11.

[0027] When the engine oil temperature control system provided by the present invention is actually working, the engine oil in the engine oil pan 1 is transported to the first heat exchanger 20 through the oil suction pipeline 10 for heat exchange with the circulating medium, and then transported back to the engine oil pan 1 through the oil return pipeline 30.

[0028] In the present utility model, the first heat exchanger 20 can be a heat exchanger in any form, such as a plate heat exchanger; the circulating medium can be, for example, water.

[0029] In the present utility model, a three-way proportional valve 40 having a first inlet 401, a second inlet 402 and a first outlet 403 is provided on the oil return pipeline 30, and a first branch pipe 11 is provided between the oil pumping pipeline 10 and the second inlet 402 of the three-way proportional valve 40. The temperature of the engine oil in the engine oil pan 1 is monitored by a first temperature sensor 50 provided on the engine oil pan 1. The PID module 60 adjusts the valve opening of the second inlet 402 of the three-way proportional valve 40 according to the engine oil temperature detected by the first temperature sensor 50, and then adjusts the amount of engine oil directly transported from the oil pumping pipeline 10 to the oil return pipeline 30 through the first branch pipe 11. By controlling the amount of this part of the engine oil, the amount of engine oil entering the first heat exchanger 20 for heat exchange with the circulating medium is controlled, and thus the adjustment and control of the engine oil temperature are realized.

[0030] It should be noted that the principle of converting the signal of the first temperature sensor 50 into a temperature value and comparing it with the preset engine oil temperature, and then feedback-adjusting through the PID algorithm to control the valve opening to adjust the engine oil flow rate in the present utility model is the same as that of the prior art. The inventive concept of the present utility model is to provide a three-way proportional valve 40 with two inlets and one outlet on the oil return pipeline 30, and connect the second inlet 402 of the three-way proportional valve 40 to the oil pumping pipeline 10 through the first branch pipe 11. In this way, only by controlling the amount of engine oil entering through the second inlet 402 of the three-way proportional valve 40 can the amount of engine oil entering the first heat exchanger 20 be indirectly controlled.

[0031] Specifically, the first temperature sensor 50 feeds back the detected temperature signal of the engine oil in the engine oil pan 1 to the PID module 60. The PID module 60 converts it into an actual temperature value and compares it with the target temperature value. If the actual temperature value is higher than the target temperature value and the difference is large, the PID module 60 will control the valve opening of the second inlet 402 of the three-way proportional valve 40 to decrease, reducing the amount of engine oil in the oil pumping pipeline 10 directly entering the oil return pipeline 30 through the first branch pipe 11, so that more engine oil pumped out from the oil pumping pipeline 10 enters the first heat exchanger 20 for heat exchange with the circulating medium. In this way, the engine oil flowing back into the engine oil pan 1 can be reduced to the target temperature value more quickly.

[0032] When the actual temperature value is higher than the target temperature value and the difference is small, the PID module 60 will control the valve opening of the second inlet 402 of the three-way proportional valve 40 to increase, increasing the amount of engine oil in the pumping pipeline 10 that directly enters the oil return pipeline 30 through the first branch pipe 11, so that less engine oil pumped out from the pumping pipeline 10 enters the first heat exchanger 20 for heat exchange treatment with the circulating medium. In this way, the temperature reduction amplitude of the engine oil flowing back to the engine oil pan 1 is less, and thus it can slowly approach the target temperature value.

[0033] Compared with the prior art, for example, compared with the scheme of adjusting the flow rate of the circulating medium used to take away or provide heat in the first heat exchanger 20, the scheme provided by the present invention is to exchange heat between a part of the engine oil led out from the engine oil pan 1 and the circulating medium in the first heat exchanger 20. Compared with the way of adjusting the flow rate of the circulating medium by exchanging heat between all the led-out engine oil and the circulating medium in the first heat exchanger 20, the scheme provided by the present invention can adjust the engine oil temperature faster and ensure the adjustment accuracy of the engine oil temperature.

[0034] In addition, compared with setting a proportional valve in the form of one inlet and two outlets on the pumping pipeline 10 and using this proportional valve to distribute the engine oil led out from the engine oil pan 1 into a part entering the heat exchanger and a part directly transported to the oil return pipeline 30, the scheme provided by the present invention is to set a three-way proportional valve 40 in the form of two inlets and one outlet on the oil return pipeline 30. When adjusting the flow rate of the engine oil entering the first heat exchanger 20, only the valve opening of the second inlet 402 of the three-way proportional valve 40 needs to be adjusted to control the amount of engine oil directly entering the oil return pipeline 30 through the first branch pipe 11, which is simple and convenient; in addition, the three-way proportional valve 40 in the form of two inlets and one outlet provided by the present invention also has a fluid mixing effect. The engine oil that has undergone heat exchange treatment in the first heat exchanger 20 and enters the three-way proportional valve 40 through the first inlet 401 can be evenly mixed with the engine oil that has not undergone heat exchange treatment and enters through the second inlet 402, ensuring that the engine oil transported back to the engine oil pan 1 through the oil return pipeline 30 has a uniform temperature, and further ensuring that the first temperature sensor 50 can accurately monitor the engine oil temperature in the engine oil pan 1, ensuring that the PID module 60 can accurately adjust the valve opening of the second inlet 402, and further ensuring the control accuracy of the engine oil temperature.

[0035] In the present invention, as a specific implementation manner of the pumping pipeline 10 for pumping out engine oil from the engine oil pan 1, an oil pump 12 is provided on the pumping pipeline 10, and the oil pump 12 is used to provide power to pump out the engine oil in the engine oil pan 1.

[0036] In some embodiments, a pressure gauge 31 is provided on the oil return pipe 30 on the oil outlet side of the three-way proportional valve 40. A second branch pipe 13 is provided between the oil inlet side of the oil pump 12 on the oil suction pipe 10 and the oil outlet side of the three-way proportional valve 40 on the oil return pipe 30. A regulating valve 131 is provided on the second branch pipe 13 to regulate the oil flow rate in the second branch pipe 13. In the embodiments of the present invention, the pressure gauge 31 can conveniently monitor the oil pressure in the oil return pipe 30. By providing the second branch pipe 13, a small circulation path can be formed to avoid the situation that the oil pump 12 is overloaded due to abnormal pressure during the debugging stage, and to avoid the adverse impact on the engine caused by the excessive pressure of the entire engine oil temperature control system.

[0037] In some embodiments, an engine oil filter 14 is provided on the oil suction pipe 10 and / or the oil return pipe 30, and the engine oil filter 14 is used to filter the engine oil.

[0038] It should be noted that the engine oil temperature control system provided by the present invention extracts the engine oil in the engine oil pan 1 for temperature control. Due to limited space, for the convenience of operation, in some embodiments, an oil suction hose 101 is connected to the engine oil pan 1, and the oil suction hose 101 is connected to the oil suction pipe 10 through a quick connector 103. A return oil hose 102 is connected to the engine oil pan 1, and the return oil hose 102 is connected to the oil return pipe 30 through a quick connector 103. It can be understood that the connection problem at a narrow space position is solved by the additionally provided oil suction hose 101 and return oil hose 102.

[0039] In some embodiments, a fuel filling pipe 15 is provided on the oil suction pipe 10, and the fuel filling pipe 15 is used to fill the engine oil into the oil suction pipe 10. A first control valve 151 is provided on the fuel filling pipe 15 to control the on / off of the fuel filling pipe 15. In the embodiments of the present invention, by providing the fuel filling pipe 15 with the first control valve 151 on the oil suction pipe 10, during the first debugging of the engine oil temperature control system, that is, when the engine oil pan 1 is not connected, the engine oil is filled into the oil suction pipe 10 through the fuel filling pipe 15, so that the engine oil temperature control system can operate independently to check whether there is a pipeline leakage or other abnormal conditions. It can be understood that when the engine oil temperature control system is connected to the engine oil pan 1 for normal operation, the first control valve 151 is in the off state to prevent the engine oil from overflowing from the fuel filling pipe 15 and causing leakage.

[0040] It can be understood that in the embodiments of the present utility model, the oil pumping pipeline 10 and the oil return pipeline 30 should be at different positions of the engine oil sump 1 as much as possible to prevent the engine oil that has just flowed back into the engine oil sump 1 from being pumped out by the oil pumping pipeline 10. In some embodiments, the oil pumping pipeline 10 is connected to the bottom of the engine oil sump 1, and the oil return pipeline 30 is connected to the upper middle part of the engine oil sump 1. More specifically, in a specific implementation manner of the present utility model, the oil pumping pipeline 10 is connected at the oil drain hole of the engine oil sump 1, and the oil return pipeline 30 is connected at the engine oil dipstick. Through the above settings, the influence on the pressure in the main oil passage of the engine itself is effectively avoided, thereby avoiding abnormal wear of the various moving parts of the engine.

[0041] For the convenience of control, in a specific implementation manner of the present utility model, the PID module 60 is integrated into the bench PUMA OPEN system. It should be noted that the bench PUMA OPEN system is an existing integrated platform in the art, which can integrate all engine test equipment, including emission systems, combustion analysis systems, ECU application and optimization tools, and laboratory auxiliary equipment, etc. By integrating the PID module 60 into the bench PUMA OPEN system, control can be facilitated.

[0042] During specific use, after the bench PUMA OPEN system is started, it enters the Manual state from the Monitor state. The PID module 60 will be automatically started and enter the automatic control mode. At this time, the tester needs to manually set the target value of the test oil temperature. It can be understood that in the early stage of equipment operation, the oil temperature in the engine oil pan 1 will not be too high. As the engine speed continues to increase, the oil temperature will rise. Therefore, the engine speed can be used as a starting condition for the oil temperature control system of the present invention. For example, after the engine speed is greater than 600 rpm, the bench PUMA OPEN system simultaneously sets the digital output switch quantities of the valves in the oil pump 12 and the internal circulation medium flow path of the first heat exchanger 20 to 1. The contactors and relays controlled by the switch quantities are automatically attracted, and the oil pump 12 starts to operate. At the same time, the valve of the circulation medium flow path is switched to the open state. The oil pump 12 pumps out the oil in the engine oil pan 1 through the oil extraction pipeline 10 and divides it into two paths. One path enters the first heat exchanger 20 to exchange heat with the circulation medium, and the temperature of this part of the oil decreases. The other path directly enters the second inlet 402 of the three-way proportional valve 40 through the first branch pipe 11, and the temperature of this part of the oil basically remains unchanged. The two parts of the oil are mixed in the three-way proportional valve 40 and then flow back to the engine oil pan 1 through the oil return pipeline 30. The first temperature sensor 50 detects the temperature of the oil in the engine oil pan 1 at a preset frequency. If the actual temperature value is higher than the target temperature value and the difference is large, the PID module 60 will control the valve opening of the second inlet 402 of the three-way proportional valve 40 to decrease, reducing the amount of oil in the oil extraction pipeline 10 that directly enters the oil return pipeline 30 through the first branch pipe 11, so that more of the oil pumped out by the oil extraction pipeline 10 enters the first heat exchanger 20 to exchange heat with the circulation medium. In this way, the oil flowing back to the engine oil pan 1 can be quickly reduced to the target temperature value. If the actual temperature value is higher than the target temperature value and the difference is small, the PID module 60 will control the valve opening of the second inlet 402 of the three-way proportional valve 40 to increase, increasing the amount of oil in the oil extraction pipeline 10 that directly enters the oil return pipeline 30 through the first branch pipe 11, so that less of the oil pumped out by the oil extraction pipeline 10 enters the first heat exchanger 20 to exchange heat with the circulation medium. In this way, the temperature of the oil flowing back to the engine oil pan 1 decreases less, and thus can slowly approach the target temperature value.

[0043] According to the oil temperature control system provided by the present invention, considering the need for the oil temperature to rise rapidly during some tests in the circulation process, therefore, in some embodiments, such as Figure 2As shown, the engine oil temperature control system further includes a heating assembly 70. The heating assembly 70 includes a second heat exchanger 71, a heating unit 72, and a circulation pipeline 73. The circulation pipeline 73 is arranged between the second heat exchanger 71 and the heating unit 72. A circulation pump 74 is arranged on the circulation pipeline 73 to drive the heat exchange medium to flow between the heating unit 72 and the second heat exchanger 71. The second heat exchanger 71 is configured to exchange heat between at least part of the engine oil and the heat exchange medium in the circulation pipeline 73, and convey the engine oil after heat exchange to the second inlet 402 of the three-way proportional valve 40.

[0044] It can be understood that in the above embodiment, the amount of engine oil entering the second heat exchanger 71 of the oil extraction pipeline 10 is also controlled by the opening degree of the second inlet 402 of the three-way proportional valve 40. When controlling the increase of the engine oil temperature by using the engine oil temperature control system of the present invention, the first heat exchanger 20 does not operate. By controlling the valve opening degree of the second inlet 402 of the three-way proportional valve 40, part of the engine oil enters the second heat exchanger 71 to exchange heat with the heat exchange medium, while the remaining engine oil directly passes through the first heat exchanger 20 and mixes with the engine oil after heat exchange treatment in the three-way proportional valve 40, and then flows back to the engine oil sump 1 through the oil return pipeline 30.

[0045] In the present invention, under the action of the circulation pump 74, the heat exchange medium circulates between the heating unit 72 and the second heat exchanger 71, and transfers the heat provided by the heating unit 72 to the engine oil conveyed by the oil extraction pipeline 10, so as to achieve the purpose of raising the temperature of this part of the engine oil. The present invention does not make special limitations on the type of the heat exchange medium in the circulation pipeline 73. For example, it can be engine oil.

[0046] In some embodiments, the heating assembly 70 further includes a second temperature sensor 75 and an FDV module 76. The second temperature sensor 75 is arranged on the circulation pipeline 73 to detect the temperature of the heat exchange medium in the circulation pipeline 73. The FDV module 76 is configured to control the opening or closing of the heating unit 72 according to the temperature of the heat exchange medium detected by the second temperature sensor 75.

[0047] In an embodiment of the present utility model, the control of the heating unit 72 is achieved through the FDV module 76. When the heating assembly 70 is enabled to rapidly increase the temperature of the engine oil in the engine oil pan 1, the first heat exchanger 20 stops working, and at this time, the circulation pump 74 and the heating unit 72 start working. The second temperature sensor 75 collects the temperature of the heat exchange medium in the circulation pipeline 73 at a certain preset frequency. When the temperature value of the heat exchange medium is lower than the preset temperature, the FDV module 76 controls the contactor of the heating unit 72 to close to heat the heat exchange medium in the circulation pipeline 73; when the temperature of the heat exchange medium collected by the second temperature sensor 75 is higher than the preset temperature, the FDV module 76 controls the contactor of the heating unit 72 to open, and stops heating the heat exchange medium in the circulation pipeline 73. That is, when the heating assembly 70 is enabled, through the FDV module 76 and the second temperature sensor 75, it can be ensured that the heat exchange medium at the preset temperature always flows in the circulation pipeline 73, ready to heat the engine oil at any time.

[0048] Further, for the convenience of control, the FDV module 76 is integrated in the bench PUMA OPEN system, and the start-stop variable name value of the heating assembly 70 and the preset temperature of the heat exchange medium in the circulation pipeline 73 are assigned in the bench PUMA OPEN system.

[0049] Exemplarily, when the start-stop variable name value of the heating assembly 70 is set to 1, at this time, both the circulation pump 74 and the heating unit 72 are turned on, and the FDV module 76 starts to receive the temperature of the heat exchange medium in the circulation pipeline 73 collected by the second temperature sensor 75 at a preset frequency. When the actual temperature of the collected heat exchange medium is lower than the preset temperature, the FDV module 76 controls the contactor of the heating unit 72 to close to heat the heat exchange medium in the circulation pipeline 73; when the temperature of the heat exchange medium collected by the second temperature sensor 75 is higher than the preset temperature, the FDV module 76 controls the contactor of the heating unit 72 to open, and stops heating the heat exchange medium in the circulation pipeline 73. If there is no requirement for controlling the temperature rise of the engine oil in the engine oil pan 1 during the test, it is only necessary to set the start-stop variable name value of the heating assembly 70 to 0. At this time, the heating function will not be enabled, and neither the circulation pump 74 nor the heating unit 72 will work. The engine oil from the oil pumping pipeline 10 only enters the second inlet 402 of the three-way proportional valve 40 through the second heat exchanger 71. That is, the operator can judge whether to rapidly increase the temperature of the engine oil in the engine oil pan 1 according to the specific requirements of the test, and then directly set the start-stop variable name value of the heating assembly 70 on the operation interface of the bench PUMA OPEN system.

[0050] The preferred embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited thereto. Within the scope of the technical concept of the present utility model, various simple modifications can be made to the technical solutions of the present utility model. To avoid unnecessary repetition, the present utility model will not separately describe various possible combinations. However, these simple modifications and combinations should also be regarded as the content disclosed by the present utility model and all fall within the protection scope of the present utility model.

Claims

1. An oil temperature control system, characterized in that: The invention comprises an oil extraction pipeline (10), a first heat exchanger (20), an oil return pipeline (30), a three-way proportional valve (40), a first temperature sensor (50) and a PID module (60); the oil extraction pipeline (10) is used to transport the engine oil in the engine oil pan (1) to the first heat exchanger (20) to perform heat exchange with the circulating medium, and transport the oil back to the engine oil pan (1) through the oil return pipeline (30); The three-way proportional valve (40) has a first inlet (401), a second inlet (402) and a first outlet (403); the three-way proportional valve (40) is connected in series to the oil return pipeline (30) via the first inlet (401) and the first outlet (403); a first branch pipe (11) is provided between the oil extraction pipeline (10) and the second inlet (402) of the three-way proportional valve (40); The first temperature sensor (50) is arranged on the engine oil pan (1) for monitoring the temperature of the engine oil in the engine oil pan (1), and the PID module (60) is arranged to be able to adjust the valve opening of the second inlet (402) of the three-way proportional valve (40) according to the temperature of the engine oil detected by the first temperature sensor (50), so as to adjust the amount of engine oil transported from the oil extraction pipeline (10) to the oil return pipeline (30) through the first branch pipe (11).

2. The oil temperature control system according to claim 1, characterized in that: An oil pump (12) is arranged on the oil extraction pipeline (10), and the oil pump (12) is used to provide power to extract the oil in the engine oil pan (1).

3. The oil temperature control system according to claim 2, characterized in that: The return oil pipeline (30) is provided with a pressure gauge (31) on the oil outlet side of the three-way proportional valve (40), the oil extraction pipeline (10) is provided with a second branch pipe (13) between the oil inlet side of the oil pump (12) and the return oil pipeline (30) on the oil outlet side of the three-way proportional valve (40), and the second branch pipe (13) is provided with a regulating valve (131) for regulating the oil flow in the second branch pipe (13).

4. The oil temperature control system according to claim 1, characterized in that: An oil filter (14) is provided on the oil extraction pipeline (10) and / or the oil return pipeline (30), and the oil filter (14) is used to filter the oil.

5. The oil temperature control system according to claim 1, characterized in that: The engine oil pan (1) is connected to an oil extraction hose (101), and the oil extraction hose (101) is connected to the oil extraction pipeline (10) via a quick-connect connector (103).

6. The oil temperature control system according to claim 1, characterized in that: The engine oil pan (1) is connected to an oil return hose (102), and the oil return hose (102) is connected to the oil return pipeline (30) via a quick-connect connector (103).

7. The oil temperature control system according to claim 1, characterized in that: The oil extraction pipeline (10) is provided with a refueling pipe (15), and the refueling pipe (15) is used to add engine oil into the oil extraction pipeline (10). The refueling pipe (15) is provided with a first control valve (151) for controlling the opening and closing of the refueling pipe (15).

8. The oil temperature control system according to claim 1, characterized in that: The oil extraction pipeline (10) is connected to the bottom of the engine oil pan (1), and the oil return pipeline (30) is connected to the middle and upper part of the engine oil pan (1).

9. The oil temperature control system according to any one of claims 1 to 8, characterized in that: The oil temperature control system further comprises a heating assembly (70), wherein the heating assembly (70) comprises a second heat exchanger (71), a heating unit (72) and a circulation pipeline (73), wherein the circulation pipeline (73) is arranged between the second heat exchanger (71) and the heating unit (72), and a circulation pump (74) is arranged on the circulation pipeline (73) for driving a heat exchange medium to flow between the heating unit (72) and the second heat exchanger (71); The second heat exchanger (71) is used to perform heat exchange between at least part of the engine oil and the heat exchange medium in the circulation pipeline (73), and to transport the engine oil after heat exchange to the second inlet (402) of the three-way proportional valve (40).

10. The oil temperature control system according to claim 9, characterized in that: The heating component (70) further comprises a second temperature sensor (75) and an FDV module (76), wherein the second temperature sensor (75) is arranged on the circulation pipe (73) for detecting the temperature of the heat exchange medium in the circulation pipe (73), and the FDV module (76) is arranged to control the opening or closing of the heating unit (72) according to the temperature of the heat exchange medium detected by the second temperature sensor (75).

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