Cooling and lubricating system, cooling and lubricating control method and device and vehicle

Abstract

The embodiment of the invention provides a cooling and lubricating system, a cooling and lubricating control method and device and a vehicle. The system comprises an oil tank assembly, a cooling and filtering module, a power system and a controller. The oil tank assembly comprises an oil tank and a coarse filter. The power system comprises a transmission part, a driving part and a power generation part; the cooling and filtering module comprises an oil pump, an oil tank and a cooling and filtering module, the oil cooler is connected with an outlet of the oil pump and used for cooling the lubricating oil; the oil temperature sensor is arranged at an outlet of the oil pump and used for detecting the oil temperature of the lubricating oil pumped by the oil pump; the fine filter is connected with an outlet of the oil cooler; an inlet of the first electromagnetic valve is connected with an outlet of the oil pump, and an outlet of the first electromagnetic valve is connected to a pipeline between the oil cooler and the fine filter; the controller is connected with the oil temperature sensor and the first electromagnetic valve, and when the oil temperature of the vehicle lubricating oil is lower than the first preset oil temperature, the first electromagnetic valve is controlled to be opened.

Description

Technical Field

[0001] The present application relates to the technical field of lubrication and cooling of hybrid vehicles, and in particular to a cooling and lubrication system, a cooling and lubrication control method and device, and a vehicle. Background Art

[0002] The cooling and lubrication system of a dual-motor hybrid system is usually an extension of a single-motor or three-in-one electric drive cooling system. It usually includes a coarse filter, an oil pump, an oil cooler and other structures, as well as oil channels that connect the various parts. The lubricating oil enters the motor stator and rotor spray and the gear shaft spray port through the oil channels to cool and lubricate the motor and gear shaft system.

[0003] However, for complex dual-motor systems and multi-gear shaft systems, the cooling and lubrication flow required by the motors and gear shafts changes dynamically under different operating conditions. The existing oil-cooled cooling and lubrication system cannot make timely adjustments to the cooling and lubrication needs of each component without intelligent control, resulting in problems such as motor over-temperature derating, insufficient gear shaft lubrication leading to reduced life, or unnecessary losses caused by redundant oil pump output, resulting in low cooling and lubrication utilization. Summary of the invention

[0004] The embodiments of the present application provide a cooling lubrication system, a cooling lubrication control method and device, and a vehicle. Based on the cooling lubrication system, the temperature of the lubricating oil can be adjusted based on the vehicle operating conditions and the temperature of the lubricating oil, so that the temperature and pumping conditions of the adjusted lubricating oil are more in line with the vehicle operating conditions, thereby improving the utilization rate of the lubricating oil, and doubly filtering the lubricating oil through a coarse filter and a fine filter to reduce the impurity content in the lubricating oil and increase the service life of corresponding parts of the vehicle.

[0005] In a first aspect, an embodiment of the present application provides a cooling and lubricating system, which is applied to a hybrid vehicle, and the cooling and lubricating system includes: an oil tank assembly, a cooling and filtering module, a power system and a controller; the oil tank assembly includes an oil tank and a coarse filter; the power system includes a transmission part, a drive part and a power generation part; the cooling and filtering module includes: an oil pump, the oil pump inlet is connected to the oil tank through the coarse filter; an oil cooler is connected to the oil pump outlet and is used to cool the lubricating oil; an oil temperature sensor is arranged at the oil pump outlet position and is used to detect the oil temperature of the lubricating oil pumped by the oil pump; a fine filter is connected to the oil cooler outlet; and a first solenoid valve, the first solenoid valve inlet is connected to the oil pump outlet, and the first solenoid valve outlet is connected to the pipeline between the oil cooler and the fine filter; the controller is connected to the oil temperature sensor and the first solenoid valve respectively, and when the oil temperature of the lubricating oil of the vehicle is lower than the first preset oil temperature, the first solenoid valve is controlled to be opened, and the lubricating oil is controlled to enter the fine filter through the first solenoid valve for filtration and then be transported to the oil circuit of the power system.

[0006] In one possible implementation, the power generation unit includes: a generator; a first spray assembly connected to the fine filter outlet and used to spray lubricating oil to multiple components of the generator; a second solenoid valve arranged between the first spray assembly and the fine filter and used to adjust the flow of lubricating oil entering the generator oil circuit; a first temperature sensor connected to the controller and used to detect the first motor temperature of the generator.

[0007] In one possible implementation, when the generator is not in operation, the controller compares the first motor temperature with a first set temperature to determine that the first motor temperature meets a first condition, and then sends a closing instruction to the second solenoid valve to control the second solenoid valve to close.

[0008] In one possible implementation, when the generator is in working state, the controller compares the first motor temperature with the first temperature matrix, calculates the first real-time required oil volume of the generator, sends a flow adjustment instruction to the second solenoid valve, and controls the output flow of the first spray assembly to be adjusted to the first real-time required oil volume.

[0009] In one possible implementation, the driving unit includes: a driving motor; a second spray assembly connected to the fine filter outlet and used to spray lubricating oil to multiple components of the driving motor; and a second temperature sensor connected to the controller and used to detect the second motor temperature of the driving motor.

[0010] In one possible implementation, when the drive motor is in working state, the controller compares the second motor temperature with the second temperature matrix, calculates the second real-time required oil volume of the drive motor, sends a flow adjustment instruction to the second solenoid valve, and controls the output flow of the second spray assembly to be adjusted to the second real-time required oil volume.

[0011] In one possible implementation, the transmission part includes: a transmission assembly; a throttle valve, arranged in front of the transmission part oil circuit inlet, for increasing the flow pressure of the lubricating oil entering the transmission part oil circuit; a first spray assembly, connected to the throttle valve, for spraying lubricating oil to various components of the transmission part.

[0012] In a second aspect, an embodiment of the present application further provides a cooling lubrication control method, which is applied to a cooling lubrication system, and the method includes: When the generator is not in operation, the first motor temperature of the generator is compared with the first set temperature to determine that the first motor temperature meets the first condition, and then the lubricating oil is stopped from being delivered to the generator oil circuit; When the generator is in operation, a first motor temperature of the generator is compared with a first temperature matrix to calculate a first real-time required oil quantity of the generator, and lubricating oil is sprayed to multiple components of the generator based on the first real-time required oil quantity; or When the drive motor is in operation, the second motor temperature of the drive motor is compared with the second temperature matrix, the second real-time required oil quantity of the drive motor is calculated, and lubricating oil is sprayed to multiple components of the drive motor based on the second real-time required oil quantity.

[0013] In a third aspect, an embodiment of the present application provides a cooling and lubrication control device, which includes: a processor and a memory, wherein the memory is used to store at least one instruction, and when the instruction is loaded and executed by the processor, the cooling and lubrication control method provided in the second aspect is implemented.

[0014] In a fourth aspect, an embodiment of the present application further provides a vehicle, which may include the cooling and lubrication system provided in the first aspect.

[0015] Through the above technical scheme, when delivering lubricating oil to the power system of the vehicle, the lubricating oil can be coarsely filtered through the coarse filter of the oil tank assembly to remove coarse impurities that may be carried in the lubricating oil tank. Furthermore, secondary filtration is performed through the fine filter, thereby improving the oil quality of the pumped lubricating oil and reducing the damage of impurities in the lubricating oil to components in the power system, thereby increasing the service life of the components. On the other hand, the vehicle condition can be detected and the oil temperature can be further monitored in real time. When the oil temperature is lower than the first preset oil temperature, the first solenoid valve of the pumping oil circuit can be controlled to open, so that the lubricating oil is directly filtered through the fine filter without passing through the oil cooler and provided to each oil circuit of the power system, thereby realizing oil circuit switching based on the actual oil temperature and improving the efficiency of the cooling and lubrication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1 A schematic diagram of the architecture of a cooling and lubrication system provided by one embodiment of the present application; Figure 2 A schematic diagram of the structure of a cooling and lubrication system provided in one embodiment of the present application. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] Figure 1 A schematic diagram of the architecture of a cooling and lubrication system provided in one embodiment of the present application.

[0020] Reference Figure 1 As shown, the cooling and lubrication system may include: an oil tank assembly M1, a cooling filter module M2, a power system M3 and a controller M4.

[0021] The oil tank assembly M1 may include an oil tank (oil sump) 10 for containing lubricating oil and a coarse filter 20. The coarse filter 20 is used to perform a coarse filter on the lubricating oil in the pumping pipeline, that is, to perform a first filter on the lubricating oil extracted from the oil tank 10, for example, to filter out large particles of impurities therein.

[0022] Reference Figure 1 As shown, the cooling and filtering module M2 may include an oil pump 31 , an oil temperature sensor 32 , a first solenoid valve 33 , an oil cooler 34 , and a fine filter 35 .

[0023] The input port of the oil pump 31 is connected to the oil tank 10 through the coarse filter 20 for pumping the lubricating oil that has been coarsely filtered.

[0024] The input port of the oil cooler 34 is connected to the oil pump outlet for cooling the lubricating oil pumped in the oil circuit.

[0025] The oil temperature sensor 32 may be disposed at the outlet of the oil pump to monitor the oil temperature of the lubricating oil pumped by the oil pump in real time.

[0026] The input port of the fine filter 35 is connected to the output port of the oil cooler 34, and is used to finely filter the lubricating oil in the oil circuit, that is, to perform secondary filtration on the lubricating oil that has been coarsely filtered, for example, to finely filter the fine impurities remaining in the lubricating oil that has been coarsely filtered, etc. By providing double filtration of the lubricating oil pumped in the oil circuit, the remaining impurities (such as metal chips) can be filtered out more finely, reducing the damage of impurities to the components in the power system, thereby increasing the service life of each component.

[0027] The inlet of the first solenoid valve 33 is connected to the output port of the oil pump 31, and the outlet of the first solenoid valve 33 can be connected to the pipeline between the output port of the oil cooler 34 and the input port of the fine filter 35. In one embodiment, the first solenoid valve can be a flow switch solenoid valve.

[0028] Reference Figure 1 As shown, the power system M3 may include a transmission part M3a, a driving part M3b and a power generation part M3c.

[0029] The cooling and filtering module M2 can deliver the filtered or cooled and filtered lubricating oil to the oil circuits of the transmission part M3a, the driving part M3b and the power generation part M3c to cool and lubricate the corresponding parts.

[0030] Reference Figure 1 As shown, the controller M4 can be connected to the oil temperature sensor 32 and the first solenoid valve 33 respectively. When the lubricating oil temperature of the vehicle is lower than the first preset oil temperature, the first solenoid valve 33 is controlled to open, and the lubricating oil is controlled to enter the fine filter 35 through the first solenoid valve 33 for filtration and then delivered to the oil circuit of the power system M3.

[0031] In some embodiments, when the vehicle is in a state of just starting, the lubricating oil is generally at a low temperature, that is, lower than the first preset oil temperature. In this state, the lubricating oil extracted and pumped from the oil tank does not need to be cooled. Therefore, when it is determined that the lubricating oil temperature is lower than the first preset oil temperature, the first solenoid valve 33 can be controlled to open and the oil circuit can be switched, thereby controlling the lubricating oil to enter the fine filter 35 through the first solenoid valve 33 and then be filtered and delivered to the oil circuit of the power system M3. This oil quantity switching can avoid redundant operations of cooling the lubricating oil below the first preset oil temperature, improve the pumping efficiency, and further improve the cooling and lubrication efficiency of the cooling and lubrication system for the power system M3.

[0032] Figure 2 A schematic diagram of the structure of a cooling and lubrication system provided in one embodiment of the present application.

[0033] Reference Figure 2 As shown, the transmission part M3a may include a throttle valve 40 , a transmission assembly 50 and a first spray assembly 51 .

[0034] The transmission assembly 50 is used to provide power transmission function for the power system of the vehicle.

[0035] The throttle valve 40 can be arranged before the inlet of the transmission oil circuit to increase the flow pressure of the lubricating oil entering the transmission oil circuit. It should be noted that many parts in the transmission assembly 50 require oil lubrication, so it is necessary to spray lubricating oil evenly on multiple parts in the transmission assembly 50. Then, the flow pressure is increased by the throttle valve 40 to provide sufficient pressure for the spraying operation of the first spray assembly 51, so that the first spray assembly 51 can achieve the preset spraying effect.

[0036] Reference Figure 2 As shown, the power generation part M3c may include a generator 90 , a first spray assembly 91 , a first temperature sensor 92 , and a second solenoid valve 80 .

[0037] The first spray assembly 91 is connected to the output port of the fine filter 35 and is used to spray lubricating oil to multiple components of the generator 90 .

[0038] The second solenoid valve 80 may be disposed between the first spray assembly 91 and the fine filter 35 to adjust the flow rate of lubricating oil entering the generator oil circuit.

[0039] The first temperature sensor 92 is connected to the controller M4 and is used to detect a first motor temperature of the generator 90 .

[0040] In some embodiments, the controller M4 can obtain the working status information of the generator 90 , that is, it can determine whether the generator 90 is currently in a working state or in a non-working state through the working status information of the generator 90 .

[0041] Specifically, when it is determined that the generator 90 is in working condition, the controller M4 can compare the first motor temperature monitored in real time by the first temperature sensor 92 with the first set temperature to determine whether the first motor temperature meets the first condition. When the first motor temperature meets the first condition, a closing command can be sent to the second solenoid valve 80 to control the second solenoid valve 80 to close, so that more lubricating oil flows to the drive unit, thereby improving the system lubrication efficiency and the motor efficiency.

[0042] When the generator 90 is in working state, the controller M4 compares the first motor temperature monitored in real time by the first temperature sensor 92 with the first temperature matrix, calculates the first real-time required oil volume of the generator 90, and sends a flow adjustment instruction to the second solenoid valve 80 to control the output flow of the first spray assembly 91 to be adjusted to the first real-time required oil volume.

[0043] Reference Figure 2 As shown, the driving part M3b may include a driving motor 60 , a second spray assembly 61 and a second temperature sensor 62 .

[0044] The second spray assembly 61 is connected to the output port of the fine filter 35 and is used to spray lubricating oil to multiple components of the drive motor 60 .

[0045] The second temperature sensor 62 may be connected to the controller M4 to monitor the second motor temperature of the drive motor 60 in real time.

[0046] In some embodiments, the controller M4 can obtain the working state information of the drive motor 60, that is, it can determine whether the drive motor 60 is currently in a working state or in a non-working state through the working state information of the drive motor 60. Specifically, when it is determined that the drive motor 60 is in a working state, the controller M4 can compare the second motor temperature monitored in real time by the second temperature sensor 62 with the second temperature matrix, thereby calculating the second real-time required oil volume of the drive motor 60, and sending a flow adjustment instruction to the second solenoid valve to control the output flow of the second spray assembly to be adjusted to the second real-time required oil volume.

[0047] The present application also provides a cooling lubrication control method, which may include the following steps: S301: when the generator is not in operation, comparing a first motor temperature of the generator with a first set temperature to determine that the first motor temperature meets a first condition, stopping the delivery of lubricating oil to the generator oil circuit; S311: when the generator is in operation, comparing a first motor temperature of the generator with a first temperature matrix, calculating a first real-time required oil quantity of the generator, and spraying lubricating oil to multiple components of the generator based on the first real-time required oil quantity; or S321: When the drive motor is in working state, the second motor temperature of the drive motor is compared with the second temperature matrix, the second real-time required oil quantity of the drive motor is calculated, and lubricating oil is sprayed to multiple components of the drive motor based on the second real-time required oil quantity.

[0048] An embodiment of the present application also provides a cooling and lubrication control device, which may include: a processor and a memory, the memory being used to store at least one instruction, and when the instruction is loaded and executed by the processor, the cooling and lubrication control method provided in the above embodiment of the present application is implemented.

[0049] An embodiment of the present application also provides a vehicle, which may include the cooling and lubrication system provided by any embodiment of the present application.

[0050] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0051] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0052] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0053] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0054] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to perform some steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program codes.

[0055] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A cooling and lubrication system, characterized in that: Applied to hybrid vehicles, the cooling and lubrication system includes: a tank assembly, a cooling filter module, a power system, and a controller; The oil tank assembly comprises an oil tank and a coarse filter; The power system includes a transmission part, a driving part and a power generation part; The cooling filter module comprises: An oil pump, wherein an inlet of the oil pump is connected to the oil tank through the coarse filter; An oil cooler, connected to the oil pump outlet, for cooling the lubricating oil; An oil temperature sensor, disposed at the outlet of the oil pump, for detecting the oil temperature of the lubricating oil pumped by the oil pump; a fine filter connected to the oil cooler outlet; and a first solenoid valve, wherein an inlet of the first solenoid valve is connected to an outlet of the oil pump, and an outlet of the first solenoid valve is connected to a pipeline between the oil cooler and the fine filter; The controller is connected to the oil temperature sensor and the first solenoid valve respectively. When the oil temperature of the lubricating oil in the vehicle is lower than the first preset oil temperature, the first solenoid valve is controlled to open, and the lubricating oil is controlled to enter the fine filter through the first solenoid valve for filtration and then delivered to the oil circuit of the power system.

2. The cooling lubrication system according to claim 1, characterized in that: The power generation unit comprises: dynamo; a first spray assembly, connected to the fine filter outlet, for spraying lubricating oil to multiple components of the generator; A second solenoid valve, disposed between the first spray assembly and the fine filter, for adjusting the flow of lubricating oil entering the generator oil circuit; The first temperature sensor is connected to the controller and is used to detect a first motor temperature of the generator.

3. The cooling lubrication system according to claim 2, characterized in that: When the generator is not in operation, the controller compares the first motor temperature with a first set temperature to determine that the first motor temperature meets a first condition, and then sends a closing instruction to the second solenoid valve to control the second solenoid valve to close.

4. The cooling lubrication system according to claim 2, characterized in that: When the generator is in working state, the controller compares the first motor temperature with the first temperature matrix, calculates the first real-time required oil volume of the generator, sends a flow adjustment instruction to the second solenoid valve, and controls the output flow of the first spray assembly to be adjusted to the first real-time required oil volume.

5. The cooling lubrication system according to claim 2, characterized in that: The driving unit comprises: Drive motor; a second spray assembly, connected to the outlet of the fine filter, for spraying lubricating oil to multiple components of the drive motor; The second temperature sensor is connected to the controller and is used to detect a second motor temperature of the drive motor.

6. The cooling lubrication system according to claim 5, characterized in that: When the drive motor is in working state, the controller compares the second motor temperature with the second temperature matrix, calculates the second real-time required oil volume of the drive motor, sends a flow adjustment instruction to the second solenoid valve, and controls the output flow of the second spray assembly to be adjusted to the second real-time required oil volume.

7. The cooling lubrication system according to claim 1, characterized in that: The transmission part comprises: Transmission components; A throttle valve, arranged before the inlet of the transmission oil circuit, for increasing the flow pressure of the lubricating oil entering the transmission oil circuit; The first spray assembly is connected to the throttle valve and is used for spraying lubricating oil to various components of the transmission part.

8. A cooling lubrication control method, characterized in that: Applied to a cooling and lubrication system, the method comprises: When the generator is not in operation, the first motor temperature of the generator is compared with the first set temperature to determine that the first motor temperature meets the first condition, and then the lubricating oil is stopped from being delivered to the generator oil circuit; When the generator is in operation, a first motor temperature of the generator is compared with a first temperature matrix to calculate a first real-time required oil quantity of the generator, and lubricating oil is sprayed to multiple components of the generator based on the first real-time required oil quantity; or When the drive motor is in operation, the second motor temperature of the drive motor is compared with the second temperature matrix, the second real-time required oil quantity of the drive motor is calculated, and lubricating oil is sprayed to multiple components of the drive motor based on the second real-time required oil quantity.

9. A cooling and lubrication control device, characterized in that: The device comprises: A processor and a memory, wherein the memory is used to store at least one instruction, and when the instruction is loaded and executed by the processor, the cooling and lubrication control method according to claim 8 is implemented.

10. A vehicle, characterized in that: The vehicle comprises a cooling lubrication system according to any one of claims 1-7.

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