Lubrication system, vehicle and method for controlling the temperature of lubricating oil

Abstract

The application relates to a lubricating system, a vehicle and a lubricating oil temperature control method. The lubricating system comprises a structure to be lubricated, a lubricating pipeline for conveying lubricating oil to the structure to be lubricated, a heat dissipation pipeline for conveying low-temperature medium, a heating pipeline for conveying high-temperature medium, a first heat exchanger and a second heat exchanger. The heating pipeline passes through the first heat exchanger. When the lubricating system is in a first state, the heat dissipation pipeline is sequentially communicated with the second heat exchanger and the first heat exchanger, and the lubricating pipeline is communicated with the first heat exchanger. When the lubricating system is in a second state, the lubricating pipeline is located away from the first heat exchanger and the second heat exchanger. When the lubricating system is in a third state, the heat dissipation pipeline is communicated with the first heat exchanger and located away from the second heat exchanger, and the lubricating pipeline is communicated with the first heat exchanger. By switching the state of the lubricating system, the temperature in the cavity of the structure to be lubricated is kept within a certain range, thereby guaranteeing the lubricating effect of the lubricating oil and the precision of the sensor in the structure to be lubricated.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to lubrication systems, vehicles, and methods for controlling lubricating oil temperature. Background Technology

[0002] As a crucial component of the vehicle's transmission system, the internal temperature of the transmission has a significant impact on its performance. For example, electrical components such as the TCU and sensors inside the transmission are highly sensitive to temperature and greatly affected by it. If the internal temperature of the transmission is too high or too low, it will affect the reliability of the electrical components, thereby affecting the driving safety of the entire vehicle.

[0003] On the other hand, the physical properties of the lubricating oil used in the transmission are also closely related to the temperature inside the transmission chamber. If the temperature inside the transmission chamber is high, the viscosity of the lubricating oil is low, which will affect the formation of the oil film on the surface of gears and bearings, leading to dry friction on the gear surface and increasing the wear of gears and bearings. If the temperature inside the transmission chamber is low, the viscosity of the lubricating oil is high and its fluidity is poor, which will increase the pressure of the lubrication system and reduce the output oil volume of the oil suction pump, which will also affect the lubrication of the transmission and ultimately affect the service life of the transmission. Summary of the Invention

[0004] Therefore, it is necessary to provide a method for controlling the temperature of the lubrication system, vehicle, and lubricating oil to address the issue of maintaining the internal temperature of the transmission.

[0005] A lubrication system, comprising:

[0006] Structure to be lubricated;

[0007] Lubrication lines are used to deliver lubricating oil to the structure to be lubricated;

[0008] Heat dissipation piping is used to transport low-temperature media;

[0009] Heating pipes are used to transport high-temperature media;

[0010] First heat exchanger;

[0011] The second heat exchanger, the heating pipeline passes through the first heat exchanger;

[0012] The lubrication system includes a first state, a second state, and a third state. When the lubrication system is in the first state, the heat dissipation pipe is connected to the second heat exchanger and the first heat exchanger in sequence, the lubrication pipe is connected to the first heat exchanger, and the low-temperature medium exchanges heat with the high-temperature medium and then exchanges heat with the lubricating oil.

[0013] When the lubrication system is in the second state, the lubrication pipeline is located away from the first heat exchanger and the second heat exchanger;

[0014] When the lubrication system is in the third state, the heat dissipation pipe is connected to the first heat exchanger and avoids the second heat exchanger, the lubrication pipe is connected to the first heat exchanger, and the low-temperature medium exchanges heat with the lubricating oil.

[0015] In one embodiment, the lubrication system further includes a controller and a temperature sensor for monitoring the temperature of the lubricating oil within the structure to be lubricated;

[0016] The controller is electrically connected to the temperature sensor and is configured to control the lubrication system to switch between the first state, the second state, and the third state based on the temperature characteristics monitored by the temperature sensor.

[0017] In one embodiment, the lubrication system further includes a first reversing valve and a first heat exchange pipeline electrically connected to the controller. The first reversing valve includes a first inlet, a second inlet, a first outlet, and a second outlet. The first inlet is connected to the lubrication pipeline, the first outlet is connected to the second inlet through the first heat exchange pipeline, and the second outlet is connected to the structure to be lubricated. The first heat exchange pipeline passes through the first heat exchanger.

[0018] When the lubrication system is in the second state, the first inlet and the second outlet are connected; when the lubrication system is in the first state or the third state, the first inlet and the first outlet are connected, and the second inlet and the first inlet are connected.

[0019] In one embodiment, the lubrication system further includes a second reversing valve and a second heat exchange pipeline electrically connected to the controller. The first reversing valve includes a third inlet, a fourth inlet, a third outlet, and a fourth outlet. The third inlet is connected to the heat dissipation pipeline, the third outlet is connected to the fourth inlet through the second heat exchange pipeline, and the fourth outlet is connected to the first heat exchanger. The second heat exchange pipeline passes through the second heat exchanger.

[0020] When the lubrication system is in the first state, the third inlet is connected to the third outlet, and the fourth inlet is connected to the fourth outlet;

[0021] When the lubrication system is in the third state, the third inlet is connected to the fourth outlet.

[0022] In one embodiment, the lubrication system further includes a shut-off valve electrically connected to the controller, the shut-off valve being connected to the fourth outlet and the first heat exchanger respectively, and the connection or disconnection between the fourth outlet and the first heat exchanger can be controlled in a controlled manner.

[0023] In one embodiment, the lubrication system further includes an oil pump, the oil pump inlet being connected to the structure to be lubricated, the oil pump outlet being connected to the lubrication pipeline, and the temperature sensor being used to monitor the temperature characteristics of the lubricating oil in the oil pump inlet.

[0024] In one embodiment, a speed sensor is also provided inside the structure to be lubricated, and the speed sensor is electrically connected to the controller;

[0025] The oil pump is electrically connected to the controller, and the controller is configured to control the oil output of the oil pump based on the rotational speed characteristics monitored by the rotational speed sensor.

[0026] In one embodiment, a torque sensor is also provided inside the structure to be lubricated, and the torque sensor is electrically connected to the controller;

[0027] The oil pump is electrically connected to the controller, and the controller is configured to control the oil pump output based on the torque characteristics monitored by the torque sensor.

[0028] A vehicle including the lubrication system described above.

[0029] A lubricating oil temperature control method, applied to the lubrication system described above, includes the following steps:

[0030] If the temperature characteristics of the lubricating oil in the structure to be lubricated are obtained, and the temperature characteristics are lower than a first preset value, the lubrication system is controlled to be in a first state.

[0031] If the temperature characteristic is greater than the first preset value but less than the second preset value, the lubrication system is controlled to be in the second state.

[0032] If the temperature characteristic is greater than the second preset value, the temperature system is controlled to be in the third state.

[0033] The aforementioned lubrication system adjusts the lubrication system to the first, second, and third states to respectively heat up, maintain, and cool down the lubricating oil in the structure to be lubricated. This ensures that the lubricating oil in the structure to be lubricated is always within a certain temperature range. The lubricating oil is used to adjust the temperature inside the structure to be lubricated, thereby maintaining the temperature inside the structure within a certain range, ensuring the lubrication effect of the lubricating oil, and the accuracy of the sensors in the structure to be lubricated. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the lubrication system in a first state according to an embodiment of this application.

[0035] Figure 2 This is a schematic diagram of the lubrication system in a second state according to an embodiment of this application.

[0036] Figure 3 This is a schematic diagram of the lubrication system in a third state according to an embodiment of this application.

[0037] Figure 4 This is a schematic flowchart of a lubricating oil temperature control method in one embodiment of this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] Lubrication line 10; heat dissipation line 11; heating line 12; first heat exchanger 13; second heat exchanger 14; temperature sensor 15; controller 16;

[0040] First reversing valve 20; First heat exchange pipeline 21; First inlet 22; First outlet 23; Second inlet 24; Second outlet 25;

[0041] Second reversing valve 30; Second heat exchange pipeline 31; Third inlet 32; Fourth inlet 33; Third outlet 34; Fourth outlet 35;

[0042] 40. Shut-off valve; 41. Oil pump; 42. Speed ​​sensor; 43. Torque sensor; 44. Drive motor; 45. Three-position four-way valve;

[0043] Structure to be lubricated 100. Detailed Implementation

[0044] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0045] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0046] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0050] In actual use, the lubricating oil used in the transmission not only lubricates the gears inside the transmission, but also plays a very important role in regulating the temperature inside the transmission cavity because the cavity of the transmission is filled with lubricating oil.

[0051] Based on this, see Figure 1 , Figure 2 and Figure 3 The lubrication system provided in one embodiment of this application includes a structure to be lubricated 100, a lubrication pipeline 10, a heat dissipation pipeline 11 and a heat exchange pipeline, a first heat exchanger 13 and a second heat exchanger 14. The lubrication pipeline 10 is used to deliver lubricating oil to the structure to be lubricated 100, the heat dissipation pipeline 11 is used to deliver a low-temperature medium, the heat exchange pipeline is used to deliver a high-temperature medium, and the heating pipeline 12 passes through the first heat exchanger 13.

[0052] The lubrication system includes a first state, a second state, and a third state. When the lubrication system is in the first state, refer to... Figure 1 The heat dissipation pipe 11 is sequentially connected to the second heat exchanger 14 and the first heat exchanger 13, and the lubrication pipe 10 is connected to the first heat exchanger 13. After exchanging heat with the high-temperature medium, the low-temperature medium then exchanges heat with the lubricating oil to increase the temperature of the lubricating oil. Specifically, after the low-temperature medium exchanges heat with the high-temperature medium in the second heat exchanger 14, the low-temperature medium absorbs the heat from the high-temperature medium and its temperature rises. The heated low-temperature medium then exchanges heat with the lubricating oil in the first heat exchanger 13, thereby allowing the lubricating oil to absorb the temperature of the low-temperature medium and finally increase the temperature of the lubricating oil.

[0053] When the lubrication system is in the second state, refer to Figure 2 The lubrication pipeline 10 is located away from the first heat exchanger 13 and the second heat exchanger 14, that is, the lubricating oil in the lubrication pipeline 10 does not exchange heat with the high temperature medium and the low temperature medium, and is delivered to the structure 100 to be lubricated at a normal temperature.

[0054] When the lubrication system is in the third state, refer to Figure 3 The heat dissipation pipe 11 is connected to the first heat exchanger 13 and avoids the second heat exchanger 14. The lubrication pipe 10 is connected to the first heat exchanger 13. The low-temperature medium exchanges heat with the lubricating oil. That is to say, when the lubrication system is in the third state, the low-temperature medium does not exchange heat with the high-temperature medium, maintains a low-temperature state, and exchanges heat with the lubricating oil in the first heat exchanger 13, so as to absorb the temperature of the lubricating oil through the low-temperature medium, thereby reducing the temperature of the lubricating oil.

[0055] The aforementioned lubrication system adjusts the lubrication system to the first, second, and third states to respectively heat up, maintain, and cool down the lubricating oil in the structure to be lubricated 100, thereby ensuring that the lubricating oil in the structure to be lubricated 100 is always within a certain temperature range. The lubricating oil is used to adjust the temperature inside the structure to be lubricated 100, so that the temperature inside the structure to be lubricated 100 is maintained within a certain range, thereby ensuring the lubrication effect of the lubricating oil and the accuracy of the sensors in the structure to be lubricated 100.

[0056] Optionally, the structure to be lubricated 100 is a gearbox, so that the internal temperature of the gearbox is always kept within a certain range through the above-mentioned lubrication structure. It should be noted that in other embodiments, the above-mentioned structure to be lubricated 100 can also be a gearbox or other structure that requires lubrication.

[0057] Furthermore, the low-temperature medium can be cooling water, coolant, etc. For example, when the above-mentioned lubrication system is used in a vehicle, the vehicle water tank can be directly connected to the heat dissipation pipe 11 to introduce the cooling water in the water tank into the heat dissipation pipe 11. The high-temperature medium can be a liquid or gas with a high temperature, such as exhaust gas from the vehicle.

[0058] In some embodiments of this application, the lubrication system further includes a controller 16 and a temperature sensor 15. The temperature sensor 15 is used to monitor the temperature of the lubricating oil inside the structure 100 to be lubricated. The controller 16 is electrically connected to the temperature sensor 15 and is configured to control the lubrication system to switch between a first state, a second state, and a third state based on the temperature characteristics monitored by the temperature sensor 15. Thus, the temperature sensor 15 monitors the temperature of the lubricating oil in the structure 100 to be lubricated, thereby indirectly obtaining the internal temperature of the cavity inside the structure 100. The controller 16 then controls the lubrication system to switch between the first, second, and third states, ensuring that the internal temperature of the structure 100 to be lubricated is always maintained within a certain temperature range.

[0059] The temperature sensor 15 can be directly installed inside the structure to be lubricated 100 to detect the temperature of the lubricating oil inside the structure to be lubricated 100. In some embodiments, it can also be installed outside the structure to be lubricated to detect the temperature of the lubricating oil flowing out from the structure to be lubricated 100, thereby indirectly obtaining the temperature of the lubricating oil inside the structure to be lubricated.

[0060] Specifically, the lubrication system also includes an oil pump 41, the oil inlet of which is connected to the structure 100 to be lubricated, and the oil outlet of which is connected to the lubrication pipeline 10, so that the lubricating oil in the structure 100 to be lubricated is pumped into the lubrication pipeline 10 through the oil pump 41, so that the lubricating oil can be heated or cooled in accordance with the state of the lubrication system.

[0061] The temperature sensor 15 is used to monitor the temperature characteristics of the lubricating oil in the oil inlet of the oil pump 41. Since the lubricating oil flowing out of the structure to be lubricated 100 flows directly into the oil inlet of the oil pump 41, the temperature of the lubricating oil in the oil inlet of the oil pump 41 can be detected indirectly to obtain the temperature of the lubricating oil in the structure to be lubricated 100, and thus obtain the cavity temperature of the structure to be lubricated 100. The temperature sensor 15 is then transmitted to the controller 16. The controller 16 then controls the state of the lubrication system so that the lubricating oil flowing out of the oil outlet of the oil pump 41 can be heated or cooled before entering the structure to be lubricated 100, thereby regulating the cavity temperature of the structure to be lubricated 100.

[0062] In some embodiments, in order to switch the lubrication system between a first state, a second state, and a third state, the lubrication system further includes a first reversing valve 20 and a first heat exchange pipeline 21 electrically connected to the controller 16. The first reversing valve 20 includes a first inlet 22, a second inlet 24, a first outlet 23, and a second outlet 25. The first inlet 22 is connected to the lubrication pipeline 10, the first outlet 23 is connected to the second inlet 24 through the first heat exchange pipeline 21, and the second outlet 25 is connected to the structure 100 to be lubricated. The first heat exchange pipeline 21 passes through the first heat exchanger 13.

[0063] When the lubrication system is in the second state, the first inlet 22 and the second outlet 25 are connected. The lubricating oil in the lubrication pipeline 10 flows directly into the structure 100 to be lubricated after passing through the first reversing valve 20, without passing through the first heat exchanger 13 or the second heat exchanger 14. When the lubrication system is in the first state, the first inlet 22 and the first outlet 23 are connected, and the second inlet 24 is connected to the first inlet 22. That is, the lubricating oil in the lubrication pipeline 10 flows into the first heat exchanger 13 after being guided by the first reversing valve 20. After exchanging heat with the low-temperature medium in the first heat exchanger 13, it flows back into the first reversing valve 20 and finally flows into the structure 100 to be lubricated. When the lubrication system is in the third state, the same as the lubrication system in the first state, the first inlet 22 and the first outlet 23 are connected, and the second inlet 24 is connected to the first inlet 22. The lubricating oil passes through the first heat exchanger 13 before entering the system to be lubricated.

[0064] Furthermore, the lubrication system also includes a second reversing valve 30 and a second heat exchange pipeline 31 electrically connected to the controller 16. The second reversing valve 30 includes a third inlet 32, a fourth inlet 33, a third outlet 34, and a fourth outlet 35. The third inlet 32 ​​is connected to the heat dissipation pipeline 11, the third outlet 34 is connected to the fourth inlet 33 through the second heat exchange pipeline 31, the fourth outlet 35 is connected to the first heat exchanger 13, and the second heat exchange pipeline 31 passes through the second heat exchanger 14.

[0065] When the lubrication system is in the first state, the third inlet 32 ​​and the third outlet 34 are connected, and the fourth inlet 33 and the fourth outlet 35 are connected. At this time, the low-temperature medium in the heat dissipation pipe 11 flows to the second heat exchanger 14 through the second reversing valve 30, and exchanges heat with the high-temperature medium in the heating pipe 12 in the second heat exchanger 14. This causes the low-temperature medium to absorb energy from the high-temperature medium and rise in temperature. The heated low-temperature medium then enters the first heat exchanger 13 and exchanges heat with the lubricating oil flowing into the first heat exchanger 13 from the lubrication pipe 10, causing the temperature of the lubricating oil to rise. Finally, the lubricating oil flows back to the structure to be lubricated 100, raising the temperature of the cavity inside the structure to be lubricated 100.

[0066] When the lubrication system is in the third state, the third inlet 32 ​​and the fourth outlet 35 are connected. The low-temperature medium in the heat dissipation pipe 11 is guided by the second heat exchanger 14 and directly enters the first heat exchanger 13. Without passing through the second heat exchanger 14, the low-temperature medium does not exchange heat with the high-temperature medium, but directly exchanges heat with the lubricating oil in the first heat exchanger 13 to achieve the effect of cooling the lubricating oil.

[0067] When the lubrication system is in the second state, since the lubrication oil in the lubrication pipeline 10 does not pass through the first heat exchanger 13, the second reversing valve 30 can be in any state in this state. That is, when the lubrication system is in the second state, the lubrication pipeline 10 can be connected to the first heat exchanger 13 or not connected to the first heat exchanger 13.

[0068] In some specific embodiments, the lubrication system further includes a shut-off valve 40 electrically connected to the controller 16. The shut-off valve 40 is connected to the fourth outlet 35 and the first heat exchanger 13 respectively, and can controllably control the connection or disconnection between the fourth outlet 35 and the first heat exchanger 13. Thus, when the lubrication system is in the second state, the shut-off valve 40 can directly cut off the second reversing valve 30 and the first heat exchanger 13, thereby preventing the flow of the low-temperature medium and avoiding the direct discharge of the thermal or cold energy of the low-temperature medium, thus preventing energy waste.

[0069] In some embodiments, the lubrication system further includes a three-position four-way valve 45. The three-position four-way valve is configured to connect the second outlet 25 of the first directional valve 20 and the structure 100 to be lubricated. The lubricating oil in the lubrication pipeline 10 flows into the three-position four-way valve 45 after passing through the first directional valve 20. The three-position four-way valve is connected to multiple oil passages in the structure 100 to control the amount of lubricating oil flowing into each oil passage in the structure 100 to be lubricated.

[0070] The structure to be lubricated 100 is also equipped with a speed sensor 42, which is electrically connected to the controller 16. The oil pump 41 is also electrically connected to the controller 16. The controller 16 is configured to control the oil output of the oil pump 41 based on the speed characteristics monitored by the speed sensor 42, and to rationally distribute the oil to each oil passage through a three-dimensional four-way valve, so as to improve the rationality of the use of the lubrication system, extend the overall life of the lubrication system, and achieve more precise and effective lubrication of the gear shafts and gears in the gearbox.

[0071] Based on the same principle, a torque sensor 43 is also provided in the structure to be lubricated 100. The torque sensor 43 is electrically connected to the controller 16, and the controller 16 is configured to control the oil output of the oil pump 41 according to the torque characteristics monitored by the torque sensor 43, so as to lubricate the gears in the gearbox more accurately and effectively.

[0072] In some specific embodiments, the lubrication system further includes a drive motor 44, which drives the oil pump 41 and is electrically connected to the controller 16. The controller 16 controls the oil output of the oil pump 41 by controlling the rotational speed of the drive motor 44.

[0073] This application also provides a vehicle that includes the lubrication system as described in any of the above embodiments. Since the vehicle includes all the technical features of the above-described lubrication system, it possesses all the technical effects of the above-described lubrication system, which will not be repeated here.

[0074] The same concept in this application also provides a control method for a transmission assembly, used in any of the above embodiments of the transmission assembly, see reference. Figure 4 The control method for this transmission assembly includes the following steps:

[0075] If the temperature characteristics of the lubricating oil in the structure to be lubricated 100 are obtained, and the temperature characteristics are lower than a first preset value, the lubrication system is controlled to be in a first state.

[0076] If the temperature characteristic is greater than the first preset value but less than the second preset value, the lubrication system is controlled to be in the second state.

[0077] If the temperature characteristic is greater than the second preset value, the temperature system is controlled to be in the third state.

[0078] Specifically, when the temperature characteristic is lower than the first preset value, the controller 16 controls the first inlet 22 and the first outlet 23 of the first reversing valve 20 to be connected, the second inlet 24 and the first inlet 22 to be connected, and controls the third inlet 32 ​​and the third outlet 34 of the second reversing valve 30 to be connected, and the fourth inlet 33 and the fourth outlet 35 to be connected. After the low-temperature medium exchanges heat with the high-temperature medium in the second heat exchanger 14, the low-temperature medium absorbs the heat of the high-temperature medium and its temperature rises. The heated low-temperature medium then exchanges heat with the lubricating oil in the first heat exchanger 13, thereby allowing the lubricating oil to absorb the temperature of the low-temperature medium and finally raise the temperature of the lubricating oil.

[0079] When the temperature is greater than the first preset value and less than the second preset value, the controller 16 controls the first inlet 22 and the second outlet 25 of the first reversing valve 20 to be connected. The lubricating oil in the lubrication pipeline 10 flows directly into the structure to be lubricated 100 after passing through the first reversing valve 20, without passing through the first heat exchanger 13 or the second heat exchanger 14. The lubrication system is in normal working condition.

[0080] When the temperature characteristic is greater than the second preset value, the controller 16 controls the first inlet 22 and the first outlet 23 of the first reversing valve 20 to be connected, the second inlet 24 and the first inlet 22 to be connected, and controls the third inlet 32 ​​and the fourth outlet 35 of the second reversing valve 30 to be connected. The low temperature medium does not exchange heat with the high temperature medium, maintains a low temperature state, and exchanges heat with the lubricating oil in the first heat exchanger 13, so as to absorb the temperature of the lubricating oil through the low temperature medium, thereby reducing the temperature of the lubricating oil.

[0081] By adjusting the lubrication system to the first, second, and third states, the lubricating oil in the structure to be lubricated 100 is heated, maintained, and cooled respectively, thereby ensuring that the lubricating oil in the structure to be lubricated 100 is always within a certain temperature range. The temperature inside the structure to be lubricated 100 is adjusted by the lubricating oil, so that the temperature inside the structure to be lubricated 100 is maintained within a certain range, thereby ensuring the lubrication effect of the lubricating oil and the accuracy of the sensors in the structure to be lubricated 100.

[0082] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A lubrication system, characterized in that, The lubrication system includes: Structure to be lubricated (100); Lubrication line (10) is used to deliver lubricating oil to the structure to be lubricated (100). Heat dissipation pipe (11) is used to transport low-temperature media; Heating pipe (12) is used to transport high-temperature media; First heat exchanger (13); and The second heat exchanger (14) is through which the heating pipeline (12) passes; The lubrication system includes a first state, a second state, and a third state. When the lubrication system is in the first state, the heat dissipation pipe (11) is connected to the second heat exchanger (14) and the first heat exchanger (13) in sequence, and the lubrication pipe (10) is connected to the first heat exchanger (13). The low-temperature medium exchanges heat with the high-temperature medium and then exchanges heat with the lubricating oil. When the lubrication system is in the second state, the lubrication pipeline (10) is located away from the first heat exchanger (13) and the second heat exchanger (14). When the lubrication system is in the third state, the heat dissipation pipe (11) is connected to the first heat exchanger (13) and avoids the second heat exchanger (14), the lubrication pipe (10) is connected to the first heat exchanger (13), and the low-temperature medium exchanges heat with the lubricating oil; The lubrication system also includes a controller (16) and a temperature sensor (15) for monitoring the temperature of the lubricating oil in the structure to be lubricated (100); The controller (16) is electrically connected to the temperature sensor (15) and is configured to control the lubrication system to switch between the first state, the second state and the third state based on the temperature characteristics monitored by the temperature sensor (15). If the temperature characteristics of the lubricating oil in the structure to be lubricated (100) are obtained, and the temperature characteristics are lower than a first preset value, the lubrication system is controlled to be in a first state. If the temperature characteristic is greater than the first preset value but less than the second preset value, the lubrication system is controlled to be in the second state. If the temperature characteristic is greater than the second preset value, the temperature system is controlled to be in the third state.

2. The lubrication system according to claim 1, characterized in that, The lubrication system also includes a first reversing valve (20) and a first heat exchange pipeline (21) electrically connected to the controller (16). The first reversing valve (20) includes a first inlet (22), a second inlet (24), a first outlet (23), and a second outlet (25). The first inlet (22) is connected to the lubrication pipeline (10), the first outlet (23) is connected to the second inlet (24) through the first heat exchange pipeline (21), and the second outlet (25) is connected to the structure to be lubricated (100). The first heat exchange pipeline (21) passes through the first heat exchanger (13). When the lubrication system is in the second state, the first inlet (22) and the second outlet (25) are connected; when the lubrication system is in the first state or the third state, the first inlet (22) and the first outlet (23) are connected, and the second inlet (24) and the first inlet (22) are connected.

3. The lubrication system according to claim 1, characterized in that, The lubrication system also includes a second reversing valve (30) and a second heat exchange pipeline (31) electrically connected to the controller (16). The second reversing valve (30) includes a third inlet (32), a fourth inlet (33), a third outlet (34), and a fourth outlet (35). The third inlet (32) is connected to the heat dissipation pipeline (11). The third outlet (34) is connected to the fourth inlet (33) through the second heat exchange pipeline (31). The fourth outlet (35) is connected to the first heat exchanger (13). The second heat exchange pipeline (31) passes through the second heat exchanger (14). When the lubrication system is in the first state, the third inlet (32) is connected to the third outlet (34), and the fourth inlet (33) is connected to the fourth outlet (35); When the lubrication system is in the third state, the third inlet (32) is connected to the fourth outlet (35).

4. The lubrication system according to claim 3, characterized in that, The lubrication system also includes a shut-off valve (40) electrically connected to the controller (16), the shut-off valve (40) being connected to the fourth outlet (35) and the first heat exchanger (13) respectively, and being able to control the connection or disconnection of the fourth outlet (35) and the first heat exchanger (13).

5. The lubrication system according to claim 1, characterized in that, The lubrication system also includes an oil pump (41), the oil inlet of which is connected to the structure to be lubricated (100), the oil outlet of which is connected to the lubrication pipeline (10), and the temperature sensor (15) is used to monitor the temperature characteristics of the lubricating oil in the oil inlet of the oil pump (41).

6. The lubrication system according to claim 5, characterized in that, The structure to be lubricated (100) is also equipped with a speed sensor (42), which is electrically connected to the controller (16); The oil pump (41) is electrically connected to the controller (16), and the controller (16) is configured to control the oil output of the oil pump (41) based on the rotational speed characteristics monitored by the rotational speed sensor (42).

7. The lubrication system according to claim 5, characterized in that, The structure to be lubricated (100) is also equipped with a torque sensor (43), which is electrically connected to the controller (16); The oil pump (41) is electrically connected to the controller (16), and the controller (16) is configured to control the oil output of the oil pump (41) based on the torque characteristics monitored by the torque sensor (43).

8. A vehicle, characterized in that, Includes the lubrication system as described in any one of claims 1-7.

9. A method for controlling lubricating oil temperature, applied to the lubrication system as described in any one of claims 1-7, characterized in that, Includes the following steps: If the temperature characteristics of the lubricating oil in the structure to be lubricated (100) are obtained, and the temperature characteristics are lower than a first preset value, the lubrication system is controlled to be in a first state. If the temperature characteristic is greater than the first preset value but less than the second preset value, the lubrication system is controlled to be in the second state. If the temperature characteristic is greater than the second preset value, the temperature system is controlled to be in the third state.

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