Hybrid power transmission cooling and lubrication system and vehicle

Abstract

The present application provides a hybrid power transmission cooling and lubrication system, which includes a first cooling branch, a second cooling branch, a first cooling main path, a second cooling main path, a first cooling channel, and a second cooling channel. The first cooling main path is provided with a first metal sheet and is connected to the first cooling branch and the second cooling branch, respectively. When the temperature of the oil passing through the first metal sheet is less than a first preset range, the first metal sheet closes the second cooling branch, and the first cooling branch is in a connected state. When the temperature of the oil passing through the first metal sheet is greater than the first preset range, the first metal sheet closes the first cooling branch, and the second cooling branch is in a connected state. The lubricating oil is cooled by the oil cooler of the second cooling branch and flows to the first cooling channel and the second cooling channel to cool and lubricate the stator and rotor of the generator and the drive motor. The control method is simple and the cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a hybrid power transmission cooling and lubrication system and a vehicle. Background Art

[0002] Hybrid transmissions generally contain multiple motors and a complex shaft-tooth structure. The transmission and motors share oil, and the motors are cooled by oil. The cooling of the motors includes spray cooling the motor stator from the outside and cooling by introducing oil into the rotor shaft.

[0003] In the prior art, in order to control the opening and closing of the main pipeline or branch pipeline of the transmission cooling and lubrication system, a solenoid valve or a temperature control valve is set at the front end of the radiator of the cooling and lubrication system. However, this solution is costly and has complex control logic. Summary of the Invention

[0004] In view of this, the main purpose of this application is to provide a gearbox cooling and lubrication system to solve the problems of high cost and complex control logic of the gearbox cooling and lubrication system.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0006] The present application provides a hybrid transmission cooling and lubrication system, comprising:

[0007] Oil pump;

[0008] an oil pan, used for supplying oil to the oil pump;

[0009] A cooling pipeline, wherein the cooling pipeline includes a first cooling branch, a second cooling branch, a first cooling main path, and a second cooling main path, wherein one end of the first cooling main path is connected to the oil pump, and the other end of the first cooling main path is provided with a first metal sheet, and the other end of the first cooling main path is respectively connected to one end of the first cooling branch and one end of the second cooling branch, and one end of the second cooling main path is respectively connected to the other end of the first cooling branch and the other end of the second cooling branch; wherein the second cooling branch is provided with an oil cooler, and when the oil temperature is less than a first preset range, the first metal sheet closes the second cooling branch, and the first cooling branch is in a connected state; and when the oil temperature is greater than the first preset range, the first metal sheet closes the first cooling branch, and the second cooling branch is in a connected state;

[0010] a first cooling channel, wherein the first cooling channel is used to cool and lubricate the rotor unit of the generator and the rotor unit of the drive motor;

[0011] The second cooling channel is used to cool the stator of the generator and the stator of the drive motor. The first cooling channel and the second cooling channel are both connected to the other end of the second cooling main path.

[0012] Furthermore, a second metal sheet is provided on the second cooling channel. The second metal sheet is located upstream of the stator of the generator and the stator of the drive motor. The second metal sheet is used to control the connection or closure of the second cooling channel.

[0013] Furthermore, when the oil temperature is less than or equal to a second preset value, the second metal sheet closes the second cooling channel; when the oil temperature is greater than the second preset value, the second metal sheet releases the closed state of the second cooling channel, wherein the first preset range is greater than the second preset value.

[0014] Furthermore, the first metal sheet and the second metal sheet are both bimetallic sheets.

[0015] Furthermore, the cooling and lubrication system further comprises:

[0016] a first temperature sensor, configured to detect the temperature of the generator;

[0017] a second temperature sensor, configured to detect the temperature of the drive motor;

[0018] a third temperature sensor, configured to detect the oil temperature of the oil pan;

[0019] Furthermore, the cooling and lubrication system further includes a controller configured to adjust a rotation speed of the oil pump based on temperatures detected by the first temperature sensor, the second temperature sensor, and the third temperature sensor.

[0020] Furthermore, when the temperature value acquired by the first temperature sensor is greater than a preset first temperature threshold, the controller controls the speed of the oil pump to increase;

[0021] When the temperature value acquired by the second temperature sensor is greater than a preset second temperature threshold, the controller controls the speed of the oil pump to increase;

[0022] When the temperature value acquired by the third temperature sensor is greater than a preset third temperature threshold, the controller controls the speed of the oil pump to increase.

[0023] The present application also provides a vehicle, comprising: the above-mentioned cooling and lubrication system.

[0024] The present application provides a hybrid transmission cooling and lubrication system, comprising a first cooling branch, a second cooling branch, a first main cooling path, a second main cooling path, a first cooling channel, and a second cooling channel. One end of the first main cooling path is connected to an oil pump, and the other end of the first main cooling path is provided with a first metal sheet, which is connected to one end of the first cooling branch and one end of the second cooling branch, respectively. One end of the second main cooling path is connected to the other ends of the first cooling branch and the second cooling branch, respectively, and the other end of the second main cooling path is connected to the first cooling channel and the second cooling channel, respectively. The second cooling branch is provided with an oil cooler. When the temperature of the oil flowing to the first metal sheet is below a first preset range, the first metal sheet seals the second cooling branch, leaving the first cooling branch connected. When the temperature of the oil flowing to the first metal sheet is above the first preset range, the first metal sheet seals the first cooling branch, leaving the second cooling branch connected. Lubricating oil is cooled by the oil cooler in the second cooling branch and flows to the first cooling channel and the second cooling channel to cool and lubricate the stator and rotor of the engine and drive motor. This system simplifies control and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of a cooling and lubrication system for a hybrid transmission provided in an embodiment of the present application;

[0026] Figure 2 Schematic diagram of the relative positions of the first metal sheet and the first main cooling path, the first cooling branch and the second cooling branch in an embodiment of the present application.

[0027] Description of Reference Numerals

[0028] 10. Oil pan; 11. Filter; 12. Oil pump; 13. First main cooling path; 131. First cooling branch; 132. Second cooling branch; 133. Oil cooler; 14. Second main cooling path; 141. First cooling channel; 142. Second cooling channel; 15. First metal sheet; 16. Second metal sheet; 17. Rotor unit of generator; 18. Rotor unit of drive motor; 19. Stator of generator; 20. Stator of drive motor; A. The first cooling branch is in a closed state; B. The second cooling branch is in a closed state. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0030] The various specific technical features described in the specific embodiments may be combined in any suitable manner, unless they are inconsistent. For example, different embodiments and technical solutions may be formed by combining different specific technical features. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this application will not be described separately.

[0031] In the following description, the terms "first, second, ..." are used solely to distinguish different objects and do not imply any similarities or connections between the objects. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to directions during normal use. The directions "left" and "right" refer to the left-right directions shown in the corresponding schematic diagrams, which may or may not be the left-right directions during normal use.

[0032] It should be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising that element. The term "connected," unless otherwise specified, includes both direct and indirect connections.

[0033] The transmission cooling and lubrication system provided in the following specific embodiments can be used in any hybrid vehicle. For example, the cooling and lubrication system can be applied to a hybrid car, or a hybrid truck.

[0034] In one embodiment, if Figure 1As shown, the present application provides a cooling and lubrication system for a hybrid transmission, which includes an oil pump 12, an oil pan 10, a first cooling branch 131, a second cooling branch 132, a first cooling main path 13 and a second cooling main path 14, a first cooling channel 141 and a second cooling channel 142, one end of the first cooling main path 13 is connected to the oil pump 12, and the other end of the first cooling main path 13 is provided with a first metal sheet 15, the other end of the first cooling main path 13 is respectively connected to one end of the first cooling branch 131 and one end of the second cooling branch 132, and one end of the second cooling main path 14 is respectively connected to the other end of the first cooling branch 131 and the other end of the second cooling branch 132; wherein, the second cooling main path 14 is provided with an oil cooler 133, when the oil temperature is lower than a first preset range, the first metal sheet 15 closes the second cooling branch 132, and the first cooling branch 131 is in a connected state; when the oil temperature is higher than the first preset range, the first metal sheet 15 closes the first cooling branch 131, and the second cooling branch 132 is in a connected state. First cooling channel 141 is used to cool and lubricate the generator rotor unit 17 and the drive motor rotor unit 18. Second cooling channel 142 is used to cool the generator stator 19 and the drive motor stator 20. Both first cooling channel 141 and second cooling channel 142 are connected to the other end of second main cooling path 14. It should be noted that the generator rotor unit 17 includes a generator rotor, bearings for mounting the generator rotor, and gears mounted on the generator shaft. The drive motor rotor unit 18 includes a drive motor rotor, bearings for mounting the drive motor rotor, and gears mounted on the drive motor shaft.

[0035] Specifically, a first metal sheet 15 is provided at one end of the first cooling main path 13 and is respectively connected to one end of the first cooling branch 131 and one end of the second cooling branch 132. The other end of the first cooling main path 13 is connected to the oil pump 12. One end of the second cooling main path 14 is respectively connected to the other end of the first cooling branch 131 and the other end of the second cooling branch 132. The other end of the second cooling main path 14 is respectively connected to the first cooling channel 141 and the second cooling channel 142. The oil pan 10 provides lubricating oil for the cooling and lubricating system. The oil pump 12 delivers the lubricating oil in the oil pan 10 to the first cooling main path 13. When the oil temperature of the lubricating oil passing through the first metal sheet 15 of the first cooling main path 13 is lower than the first preset range, the first metal sheet 15 bends toward the second cooling branch 132 and closes the second cooling branch 132. The first cooling branch 131 is in a connected state. The lubricating oil passes through the first cooling branch 131 to the second cooling main path 14 and finally flows to the first cooling channel 141 and the second cooling channel 142. The lubricating oil flowing through the first cooling channel 141 has a great impact on the generator. The rotor unit 17 and the rotor unit 18 of the drive motor are cooled and lubricated, and the lubricating oil flowing through the second cooling channel 142 cools and lubricates the stator 19 of the generator and the stator 20 of the drive motor; when the oil temperature of the lubricating oil passing through the first metal sheet 15 of the first cooling main path 13 is greater than the first preset range, the first metal sheet 15 bends toward the first cooling branch 131 and closes the first cooling branch 131, and the second cooling branch 132 is in a connected state. The lubricating oil passes through the second cooling branch 132 to the second cooling main path 14, and finally flows to the first cooling channel 141 and the second cooling channel 142. For example, if the first preset range is 50°C to 60°C, the oil temperature of the lubricating oil passing through the first metal sheet of the first main cooling path 13 is 40°C. The first metal sheet bends toward and seals the second cooling branch 132, leaving the first cooling branch 131 in a connected state. This prevents the lubricating oil from passing through the oil cooler 133 of the second cooling branch 132 when the oil temperature is below the first preset range, thereby reducing the viscosity of the lubricating oil and affecting the lubrication efficiency of the lubricating oil for the generator and drive motor. For example, if the first preset range is 50°C to 60°C, the oil temperature of the lubricating oil passing through the first metal sheet 15 of the first main cooling path 13 is 90°C. The first metal sheet 15 bends toward and seals the first cooling branch 131, leaving the second cooling branch 132 in a connected state. The lubricating oil is cooled by the oil cooler 133 of the second cooling branch 132, preventing the high-temperature lubricating oil from damaging the generator and drive motor. A filter 11 is provided between the oil sump 10 and the oil pump 12 to filter impurities from the lubricating oil.

[0036] It should be understood that the temperature of the lubricating oil changes continuously, not abruptly. For example, when the temperature of the lubricating oil passing through the first metal sheet 15 of the first cooling main path 13 is greater than the first preset range, the first metal sheet 15 bends toward the first cooling branch 131 and closes the first cooling branch 131. The bending of the first metal sheet 15 is in a process-like manner, rather than being immediately closed when its temperature characteristic is greater than the critical point. It is characterized as a closed process.

[0037] Optionally, the oil cooler 133 may be an external air-cooled radiator, which can reduce system costs.

[0038] Optionally, the oil cooler 133 may also be cooled by water, which has high cooling efficiency.

[0039] It should be noted that the structure and material of the first metal sheet 15 are calibrated according to the early development test. Specifically, the first preset range is determined in the early design of the cooling and lubrication system, and the first metal sheet is calibrated according to the structure of the first cooling branch 131, the structure of the second cooling branch 132 and the lubricating oil temperature. By setting the first metal sheet 15 under different oil temperature conditions, it is recorded whether the first cooling branch 131 and the second cooling branch 132 are in a closed state or a connected state. If it is satisfied that when the oil temperature of the first metal sheet 15 is less than the first preset range, the first metal sheet 15 closes the second cooling branch 132 and the first cooling branch 131 is in a connected state, and when the oil temperature of the first metal sheet 15 is greater than the first preset range, the first metal sheet 15 closes the first cooling branch 131 and the second cooling branch 132 is in a connected state, then the test sample meets the design requirements and the calibration test is ended. If it does not meet the design requirements, it is necessary to reselect the material and structure of the first metal sheet 15 and re-calibrate the test until the design requirements are met. Figure 2 As shown, in the early design, the first preset range is determined to be 50°C to 60°C, and the first metal sheet 15 is arranged at one end of the first main path and is located at the intersection of the first cooling branch 131 and the second cooling branch 132. For example, when the oil temperature is less than 50°C, the first metal sheet 15 closes the second cooling branch 132, and the second cooling branch is in a closed state B; when the oil temperature is greater than 60°C, the first metal sheet 15 closes the first cooling branch 131, and the first cooling branch is in a closed state A. When the oil temperature is between 50°C and 60°C, the first cooling branch 131 and the second cooling branch 132 are both in a connected state. In the process of the oil temperature passing through the first metal sheet increasing from 50°C to 60°C, the first metal sheet turns from a state close to the first cooling branch 131 to a state close to the second cooling branch 132.

[0040] In one embodiment, if Figure 1As shown, a second metal sheet 16 is provided on the second cooling channel 142. The second metal sheet 16 is located upstream of the generator stator 19 and the drive motor stator 20. The second metal sheet 16 is used to control the connection or blocking of the second cooling channel 142. When the oil temperature is less than or equal to a second preset value, the second metal sheet 16 blocks the second cooling channel 142. When the oil temperature is greater than the second preset value, the second metal sheet 16 releases the blockage of the second cooling channel 142. The first preset range is greater than the second preset value.

[0041] Specifically, the second metal sheet 16 is provided in the second cooling channel 142 and is located upstream of the stator 19 of the generator and the stator 20 of the drive motor. When the temperature of the lubricating oil passing through the second metal sheet 16 is less than the first preset value, the second cooling channel 142 is in a closed state. For example, when the second preset value is -10°C, when the temperature of the lubricating oil flowing through the second metal sheet 16 is -20°C, the second cooling channel 142 is in a closed state, and the lubricating oil is only guided from the second cooling main path 14 to the first cooling channel 141, and the rotor unit 17 of the generator and the rotor unit 18 of the drive motor are respectively cooled. When the temperature of the lubricating oil passing through the second metal sheet 16 is less than or equal to the second preset value, the second cooling channel 142 is in a closed state. For example, when the second preset value is -10°C, the temperature of the lubricating oil flowing through the second metal sheet 16 is -30°C. The second metal sheet 16 bends to close the second cooling channel 142. The lubricating oil flows from the second main cooling path 14 only to the first cooling channel 141, thereby preventing the heat of the lubricating oil from being lost through the second cooling channel 142, reducing the viscosity of the lubricant, and thus reducing the lubrication efficiency of the lubricating oil on the rotor unit located in the first cooling channel 141. It should be understood that the "upstream" mentioned in the embodiment is relative to the flow direction of the lubricating oil.

[0042] It should be noted that, in the early design of the cooling and lubrication system, the second preset value is determined, and the structure and material of the second metal sheet 16 are calibrated according to the early development test. Specifically, the second metal sheet 16 is calibrated according to the structure of the second cooling channel 142 and the lubricating oil temperature. Under different oil temperature conditions of the second metal sheet 16, it is recorded whether the second cooling channel 142 is in a closed state or a connected state. If the second metal sheet 16 is in a closed state when the oil temperature is less than or equal to the second preset value, and the second metal sheet 16 releases the closed state of the second cooling channel 142 when the oil temperature is greater than the second preset value, then the test sample meets the design requirements and the calibration test is terminated. If it does not meet the design requirements, it is necessary to reselect the material and structure of the second metal sheet 16 and re-calibrate the test until the design requirements are met. It should be understood that, for example, when the second preset value is -10°C, as the oil temperature passing through the second metal sheet 16 gradually decreases from 30°C, the flow rate of lubricating oil in the second cooling channel 142 gradually decreases to 0. It should be further explained that when a vehicle equipped with the cooling and lubrication system of the present application is operated in an area with a climate temperature far below the second preset value, the lubricating oil is affected by the ambient temperature during driving, and the lubricating oil temperature is below the second preset value. The second metal sheet always closes the second cooling channel, preventing the heat increased by the oil stirring in the gears in the transmission from being dissipated to the generator stator 19 and the drive motor stator 20 in the second cooling channel, thereby affecting the lubrication efficiency of the lubricating oil for the rotor unit of the generator and the rotor unit of the drive motor. The first preset range is greater than the second preset value, for example, the first preset range is 50°C to 60°C, and the second preset value is -10°C. Each temperature value in the first preset range is greater than the second preset value.

[0043] In order to better understand the functions of the first metal sheet 15 and the second metal sheet 16, the gearbox cooling and lubrication system of the present application is further described. When the temperature of the lubricating oil passing through the first metal sheet 15 is greater than the first preset range, the temperature of the lubricating oil is relatively high at this time, and the first metal sheet 15 closes the first cooling branch 131, and the lubricating oil is cooled through the oil cooler 133 of the second cooling branch 132. The first cooling channel 141 and the second cooling channel 142 are both in a connected state, and the lubricating oil cools and lubricates the stator 19 of the generator, the stator 20 of the drive motor, the rotor unit 17 of the generator, and the rotor unit 18 of the drive motor at the same time, preventing the high-temperature lubricating oil from damaging the generator and the drive motor; when the temperature of the lubricating oil after cooling through the oil cooler 133 of the second cooling branch 132 is less than the first preset range, the first metal sheet 15 closes the second cooling branch 132, and the lubricating oil flows through the first cooling branch 131 to the first cooling channel 141 and the second cooling channel 142, lubricating the stator 19 of the generator, the stator 20 of the drive motor, the rotor unit 17 of the generator, and the rotor unit 18 of the drive motor. Since the oil temperature is lower than the first preset range, the oil temperature is relatively low and there is no need to guide the lubricating oil to the second cooling branch 132 for cooling, resulting in a decrease in the viscosity of the lubricating oil, thereby affecting the lubrication effect on the generator rotor and the drive electronic rotor, and avoiding the problem of excessive lubrication efficiency; due to climatic or regional reasons, when the oil temperature further drops below the second preset value, the second metal sheet 16 closes the second cooling channel 142, the first metal sheet 15 closes the second cooling branch 132, and the first cooling branch 131 is in a connected state. The lubricating oil passes through the first cooling branch 131 to the second cooling main path 14, and finally flows to the first cooling channel 141, only lubricating the rotor unit 17 of the generator and the rotor unit 18 of the drive motor, avoiding the heat generated by the gearbox stirring the oil and dissipating it to the stator 19 of the generator and the stator 20 of the drive motor in the second cooling channel 142, so that the viscosity of the lubricating oil is further reduced, affecting the lubrication effect on the generator rotor and the drive electronic rotor.

[0044] In one embodiment, the first metal sheet 15 and the second metal sheet 16 are both bimetallic sheets. Specifically, the structure and material of the first metal sheet 15 and the second metal sheet 16 are determined based on their installation locations and calibration tests. Specifically, the first preset range and the second preset value are determined based on the design requirements of the cooling and lubrication system. The active and passive layers of the first metal sheet 15 and the second metal sheet 16 are then determined based on their installation locations and calibration tests. For example, the active layer of the first metal sheet 15 is selected as a nickel-chromium alloy, and the passive layer of the first metal sheet 15 is selected as a nickel-iron alloy. The thickness of the active layer and the passive layer of the first metal sheet 15 are determined based on a calibration test on the first metal sheet 15, so that when the oil temperature of the first metal sheet 15 is less than the first preset range, the first metal sheet 15 is bent and deformed and closes the second cooling branch 132, and the first cooling branch 131 is in a connected state. When the oil temperature of the first metal sheet 15 is greater than the second preset range, the first metal sheet 15 is bent and deformed and closes the first cooling branch 131, and the second cooling branch 132 is in a connected state. When the oil temperature of the first metal sheet 15 is in the second preset range, the first cooling branch 131 and the second cooling branch 132 are both in a connected state. For example, the active layer of the second metal sheet 16 is selected as a manganese-nickel-copper alloy, and the passive layer of the second metal sheet 16 is selected as a nickel-iron alloy. The thickness of the active layer and the passive layer of the second metal sheet 16 are determined based on a calibration test on the second metal sheet 16, so that the second metal sheet 16 meets the oil temperature design requirement.

[0045] In one embodiment, the cooling and lubrication system further includes a first temperature sensor, a second temperature sensor, and a third temperature sensor. The first temperature sensor is used to detect the temperature of the generator, the second temperature sensor is used to detect the temperature of the drive motor, and the third temperature sensor is used to detect the oil temperature in the oil pan. Specifically, two first temperature sensors are provided, mounted on the generator stator 19 and the generator rotor of the generator rotor unit 17, respectively, to detect the temperatures of the generator stator 19 and the generator rotor of the generator rotor unit 17; two second temperature sensors are provided, mounted on the drive motor stator 20 and the drive motor rotor of the drive motor rotor unit 18, respectively, to detect the temperatures of the drive motor stator 20 and the drive motor rotor of the drive motor rotor unit 18; and the third temperature sensor is installed in the pipeline between the oil pan 10 and the oil pump 12 to detect the oil temperature in the oil pan 10.

[0046] In one embodiment, the cooling and lubrication system further includes a controller that adjusts the speed of the oil pump 12 based on the temperatures of the first temperature sensor, the second temperature sensor, and the third temperature sensor. When the temperature value acquired by the first temperature sensor is greater than a preset first temperature threshold, the controller increases the speed of the oil pump 12; when the temperature value acquired by the second temperature sensor is greater than a preset second temperature threshold, the controller increases the speed of the oil pump 12; and when the temperature value acquired by the third temperature sensor is greater than a preset third temperature threshold, the controller increases the speed of the oil pump 12.

[0047] Specifically, the speed of the oil pump 12 is adjusted according to the temperature values ​​of the stator 19 of the generator and the generator rotor in the rotor unit 17 of the generator measured by the first temperature sensor, the temperature values ​​of the stator 20 of the drive motor and the drive motor rotor in the rotor unit 18 of the drive motor measured by the second temperature sensor, and the lubricating oil temperature value measured by the third temperature sensor. When any temperature value of the stator 19 temperature value of the generator and the generator rotor temperature value obtained by the first temperature sensor is greater than the first temperature threshold, the controller increases the speed of the oil pump 12, thereby adjusting the oil supply of the first cooling channel 141 or the second cooling channel 142, reducing the temperature of the lubricating oil, and avoiding damage to the generator due to excessive oil temperature; when any temperature value of the stator 20 temperature value of the drive motor and the drive motor rotor temperature value obtained by the second temperature sensor is greater than the second temperature threshold, the controller increases the speed of the oil pump 12, thereby adjusting the oil supply of the first cooling channel 141 or the second cooling channel 142, and cooling and lubricating the stator 20 of the drive motor or the drive motor rotor; when the oil temperature detected by the third temperature sensor is greater than the third temperature threshold, the controller increases the speed of the oil pump 12 and increases the circulation volume to reduce the temperature of the lubricating oil and avoid damage to the motor or gearbox.

[0048] The present application also provides a vehicle, which, by setting up the above-mentioned hybrid power transmission, realizes independent cooling and lubrication of the stator unit and the rotor unit according to actual needs. When the oil temperature is greater than the first preset range, the first metal sheet 15 closes the first cooling branch 131, and the lubricating oil reduces the oil temperature of the lubricating oil through the oil cooler 133 of the second cooling branch 132 until the oil temperature is less than the second preset value. The second metal sheet 16 closes the second cooling channel 142, and the lubricating oil only flows to the first cooling channel 141 to cool and lubricate the rotor unit 18 of the drive motor and the rotor unit 17 of the generator, so as to prevent the heat generated by the transmission gear stirring the oil from being dissipated to the stator of the generator and the stator of the drive motor in the second cooling channel 142 under low oil temperature conditions, thereby reducing the lubrication effect on the rotor unit 18 of the drive motor and the rotor unit 17 of the generator.

[0049] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present application.

Claims

1. A hybrid transmission cooling and lubrication system, characterized in that: The cooling and lubrication system comprises: Oil pump; an oil pan, used for supplying oil to the cooling and lubricating system; A cooling pipeline, wherein the cooling pipeline includes a first cooling branch, a second cooling branch, a first cooling main path, and a second cooling main path, wherein one end of the first cooling main path is connected to the oil pump, and the other end of the first cooling main path is provided with a first metal sheet, and the other end of the first cooling main path is respectively connected to one end of the first cooling branch and one end of the second cooling branch, and one end of the second cooling main path is respectively connected to the other end of the first cooling branch and the other end of the second cooling branch; wherein the second cooling branch is provided with an oil cooler, and when the temperature of the oil passing through the first metal sheet is less than a first preset range, the first metal sheet closes the second cooling branch, and the first cooling branch is in a connected state; when the temperature of the oil passing through the first metal sheet is greater than the first preset range, the first metal sheet closes the first cooling branch, and the second cooling branch is in a connected state; a first cooling channel, wherein the first cooling channel is used to cool and lubricate the rotor unit of the generator and the rotor unit of the drive motor; The second cooling channel is used to cool the stator of the generator and the stator of the drive motor. The first cooling channel and the second cooling channel are both connected to the other end of the second cooling main path.

2. The cooling and lubricating system according to claim 1, characterized in that: A second metal sheet is provided on the second cooling channel. The second metal sheet is located upstream of the stator of the generator and the stator of the drive motor. The second metal sheet is used to control the connection or closure of the second cooling channel.

3. The cooling and lubricating system according to claim 2, characterized in that: When the oil temperature passing through the second metal sheet is less than or equal to a second preset value, the second metal sheet closes the second cooling channel; when the oil temperature passing through the second metal sheet is greater than the second preset value, the second metal sheet releases the closed state of the second cooling channel, wherein the first preset range is greater than the second preset value.

4. The cooling and lubricating system according to claim 2, characterized in that: The first metal sheet and the second metal sheet are both bimetallic sheets.

5. The cooling and lubricating system according to claim 1, characterized in that: The cooling and lubrication system further comprises: a first temperature sensor, configured to detect temperatures of the stator and rotor units of the generator; a second temperature sensor, configured to detect the temperature of the stator and rotor units of the drive motor; The third temperature sensor is used to detect the oil temperature of the oil pan.

6. The cooling and lubricating system according to claim 5, characterized in that: The cooling and lubrication system further includes a controller configured to adjust a rotation speed of the oil pump based on temperatures detected by the first temperature sensor, the second temperature sensor, and the third temperature sensor.

7. The cooling and lubricating system according to claim 6, characterized in that: When the temperature value acquired by the first temperature sensor is greater than a preset first temperature threshold, the controller controls the speed of the oil pump to increase; When the temperature value acquired by the second temperature sensor is greater than a preset second temperature threshold, the controller controls the speed of the oil pump to increase; When the temperature value acquired by the third temperature sensor is greater than a preset third temperature threshold, the controller controls the speed of the oil pump to increase.

8. A vehicle, characterized in that: include: A cooling lubrication system according to any one of claims 1 to 7.

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