Cooling lubricant flow distribution control systems, methods, devices, apparatuses, and media

Abstract

This invention provides a cooling lubricating oil flow distribution control system, method, apparatus, equipment, and medium, relating to the field of new energy vehicle technology. This invention designs a cooling lubricating oil flow distribution control system using two switching valves and six throttling orifices. The system automatically distributes the cooling lubricating oil flow to the motor, engine, and generator flow distribution branches by controlling the opening and closing states of the two switching valves in pure electric mode, series mode, parallel mode, and direct drive mode. This eliminates the need for active control by solenoid valves and enables stable, reliable, and low-cost control of cooling lubricating oil flow distribution in multiple modes.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle technology, and more specifically, to a cooling and lubricating oil flow distribution control system, method, device, equipment, and medium. Background Technology

[0002] New energy vehicles, especially hybrid vehicles, generally use transmissions that integrate generators, motors, and engines. The power coupling modes include: pure electric mode: only the motor and reduction gears operate; series mode: the engine directly drives the vehicle or accelerates to drive the generator, and the motor drives the vehicle with sufficient electrical power; parallel mode: the engine and motor output torque simultaneously drive the vehicle, and the generator does not participate in power generation; direct drive mode: the motor does not operate, the engine directly drives the vehicle, and excess output power can be used for power generation. The cooling and lubrication oil requirements of the various sub-assemblies in hybrid vehicles differ significantly under different modes.

[0003] Currently, fixed orifices or solenoid valves are mainly used to control the distribution of cooling oil flow to various subassemblies in hybrid electric vehicles. If a fixed orifice is used, the maximum cooling oil flow required by each subassembly in multiple modes needs to be summed to obtain the minimum threshold for that subassembly's required cooling oil flow. This can easily lead to energy waste due to excessive cooling oil distribution in practical applications. If solenoid valves are used, they are affected by problems such as difficulty in measuring flow in the transmission, increased pressure drop due to solenoid valve spool travel limitations, and difficulty in uniformly controlling multiple solenoid valves, making it difficult to control cooling oil flow distribution in two or three modes. Therefore, it is evident that existing cooling oil flow control schemes are insufficient for stable, reliable, and low-cost control of cooling oil flow distribution in multiple modes. Summary of the Invention

[0004] The purpose of this invention is to provide a cooling lubricating oil flow distribution control system, method, apparatus, equipment, and medium to achieve the technical effect of stable, reliable, and low-cost control of cooling lubricating oil flow distribution in multiple modes.

[0005] In a first aspect, embodiments of the present invention provide a cooling lubricating oil flow distribution control system, including a first switching valve, a second switching valve, a first throttling orifice, a second throttling orifice, a third throttling orifice, a fourth throttling orifice, a fifth throttling orifice, and a sixth throttling orifice; The controlled end of the first switching valve is connected to the oil pressure output end of the main oil circuit of the hydraulic system, and the controlled end of the second switching valve is connected to the control pressure output end of the pilot valve of the main oil circuit of the hydraulic system. The inflow ends of the first, second, and third throttling orifices are respectively connected to the main flow distribution circuit. The outflow end of the first throttling orifice is connected to the motor flow distribution branch. The outflow end of the second throttling orifice is connected to the inflow end of the fourth throttling orifice. The outflow end of the fourth throttling orifice is connected to the engine flow distribution branch. The outflow end of the third throttling orifice is connected to the inflow end of the first switching valve. The outflow end of the first switching valve is connected to the inflow ends of the fifth throttling orifice and the second switching valve, respectively. The outflow end of the fifth throttling orifice is connected to the generator flow distribution branch. The outflow end of the second switching valve is connected to the inflow end of the sixth throttling orifice. The outflow end of the sixth throttling orifice is connected to the inflow end of the fourth throttling orifice.

[0006] In the above implementation process, a cooling lubricating oil flow distribution control system is designed by selecting two switching valves and six throttling orifices. The cooling lubricating oil flow distribution control system controls the opening and closing states of the two switching valves in pure electric mode, series mode, parallel mode, and direct drive mode to automatically distribute the cooling lubricating oil flow in the motor flow distribution branch, engine flow distribution branch, and generator flow distribution branch. No solenoid valve active control is required, and the cooling lubricating oil flow distribution can be controlled stably, reliably, and at low cost in multiple modes.

[0007] Furthermore, the cooling lubricating oil flow distribution control system also includes at least one seventh throttling orifice, at least one eighth throttling orifice, and at least one ninth throttling orifice; All of the seventh throttling orifices are located on the motor flow distribution branch, all of the eighth throttling orifices are located on the engine flow distribution branch, and all of the ninth throttling orifices are located on the generator flow distribution branch.

[0008] In the above implementation process, by adding at least one seventh throttling orifice to the motor flow distribution branch, at least one eighth throttling orifice to the engine flow distribution branch, and at least one ninth throttling orifice to the generator flow distribution branch, a cooling lubricating oil flow distribution control system is designed, which can precisely control the cooling lubricating oil flow distribution on the motor flow distribution branch, the engine flow distribution branch, and the generator flow distribution branch.

[0009] Furthermore, the motor flow distribution branch is used to provide cooling and lubricating oil to the motor and the reduction gear meshing with the motor, the engine flow distribution branch is used to provide cooling and lubricating oil to the engine, and the generator flow distribution branch is used to provide cooling and lubricating oil to the generator.

[0010] In the above implementation process, by designing a motor flow distribution branch to provide cooling and lubricating oil to the motor and the reduction gear meshing with the motor, designing an engine flow distribution branch to provide cooling and lubricating oil to the engine, and designing a generator flow distribution branch to provide cooling and lubricating oil to the generator, it is possible to control the distribution of cooling and lubricating oil flow in multiple modes more stably, reliably, and at low cost.

[0011] Furthermore, the starting pressures of both the first and second switching valves are within a preset pressure range, and the starting pressure of the first switching valve is greater than or equal to the starting pressure of the second switching valve.

[0012] In the above implementation process, by setting the starting pressure of both the first and second switching valves to be within a preset pressure range, and ensuring that the starting pressure of the first switching valve is greater than or equal to the starting pressure of the second switching valve, it is possible to stably and reliably control the opening and closing states of the first and second switching valves in multiple modes.

[0013] Furthermore, the preset pressure range is [1 bar, 2 bar].

[0014] In the above implementation process, by setting the preset pressure range to [1 bar, 2 bar], it is possible to ensure stable and reliable control of the opening and closing states of the first and second switching valves in multiple modes.

[0015] Furthermore, the first throttling orifice, the second throttling orifice, the third throttling orifice, the fourth throttling orifice, the fifth throttling orifice, and the sixth throttling orifice are all adjustable orifices.

[0016] In the above implementation process, by selecting six adjustable flow orifices as the first, second, third, fourth, fifth, and sixth throttling orifices, the flow distribution of cooling lubricating oil can be flexibly controlled in multiple modes.

[0017] Furthermore, all of the seventh, eighth, and ninth flow orifices are adjustable flow orifices.

[0018] In the above implementation process, multiple adjustable flow orifices are selected as all seventh flow orifices, all eighth flow orifices, and all ninth flow orifices, which can flexibly control the flow distribution of cooling and lubricating oil in the motor flow distribution branch, the engine flow distribution branch, and the generator flow distribution branch.

[0019] Secondly, embodiments of the present invention provide a cooling lubricating oil flow distribution control method, applied to the cooling lubricating oil flow distribution control system described above, specifically including: The hydraulic system transmits the oil pressure of the main oil circuit to the first switching valve in real time, and transmits the pilot valve control pressure of the main oil circuit to the second switching valve in real time. When the oil pressure in the main oil circuit of the hydraulic system is less than the starting pressure of the first switching valve, and the control pressure of the pilot valve of the hydraulic system is less than the starting pressure of the second switching valve, the first switching valve and the second switching valve are triggered to close, so that the cooling lubricating oil in the main flow distribution circuit flows into the motor flow distribution branch through the flow path where the first throttle orifice is located, and flows into the engine flow distribution branch through the flow paths where the second throttle orifice and the fourth throttle orifice are located; When the oil pressure of the main oil circuit of the hydraulic system is greater than or equal to the starting pressure of the first switching valve, and the pilot valve control pressure of the main oil circuit of the hydraulic system is less than the starting pressure of the second switching valve, the first switching valve is triggered to open and the second switching valve is triggered to close, so that the cooling lubricating oil in the main flow distribution circuit flows into the motor flow distribution branch through the flow path where the first throttle orifice is located, flows into the engine flow distribution branch through the flow paths where the second throttle orifice and the fourth throttle orifice are located, and flows into the generator flow distribution branch through the flow paths where the third throttle orifice, the first switching valve and the fifth throttle orifice are located; When the oil pressure in the main oil circuit of the hydraulic system is greater than or equal to the starting pressure of the first switching valve, and the pilot valve control pressure in the main oil circuit of the hydraulic system is greater than or equal to the starting pressure of the second switching valve, the first switching valve and the second switching valve are triggered to open, so that the cooling lubricating oil in the main flow distribution circuit flows into the motor flow distribution branch through the flow path where the first throttle orifice is located, and flows into the engine flow distribution branch through the flow paths where the second throttle orifice, the fourth throttle orifice, the third throttle orifice, the first switching valve, the second switching valve, and the sixth throttle orifice are located, and flows into the generator flow distribution branch through the flow paths where the third throttle orifice, the first switching valve, and the fifth throttle orifice are located.

[0020] Thirdly, embodiments of the present invention provide a cooling lubricating oil flow distribution control device, applied to the cooling lubricating oil flow distribution control system described above, comprising: The acquisition module is used to transmit the oil pressure of the main oil circuit of the hydraulic system to the first switching valve in real time, and to transmit the pilot valve control pressure of the main oil circuit of the hydraulic system to the second switching valve in real time. The control module is used to trigger the first and second switching valves to close when the oil pressure in the main oil circuit of the hydraulic system is less than the starting pressure of the first switching valve and the control pressure of the pilot valve of the hydraulic system is less than the starting pressure of the second switching valve, so that the cooling lubricating oil in the main flow distribution circuit flows into the motor flow distribution branch through the flow path where the first throttle orifice is located, and flows into the engine flow distribution branch through the flow paths where the second throttle orifice and the fourth throttle orifice are located; The control module is further configured to trigger the opening of the first switching valve and the closing of the second switching valve when the oil pressure of the main oil circuit of the hydraulic system is greater than or equal to the starting pressure of the first switching valve and the pilot valve control pressure of the main oil circuit of the hydraulic system is less than the starting pressure of the second switching valve, so that the cooling lubricating oil in the main flow distribution circuit flows into the motor flow distribution branch through the flow path where the first throttle orifice is located, flows into the engine flow distribution branch through the flow paths where the second throttle orifice and the fourth throttle orifice are located, and flows into the generator flow distribution branch through the flow paths where the third throttle orifice, the first switching valve and the fifth throttle orifice are located; The control module is further configured to trigger the opening of the first and second switching valves when the oil pressure of the main oil circuit of the hydraulic system is greater than or equal to the starting pressure of the first switching valve and the pilot valve control pressure of the main oil circuit of the hydraulic system is greater than or equal to the starting pressure of the second switching valve, so that the cooling lubricating oil in the main flow distribution circuit flows into the motor flow distribution branch through the flow path where the first throttle orifice is located, merges into the engine flow distribution branch through the flow paths where the second throttle orifice, the fourth throttle orifice, the third throttle orifice, the first switching valve, the second switching valve, and the sixth throttle orifice are located, and flows into the generator flow distribution branch through the flow paths where the third throttle orifice, the first switching valve, and the fifth throttle orifice are located.

[0021] Fourthly, embodiments of the present invention provide an electronic device, characterized in that it includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor; the memory is coupled to the processor, and the processor implements the cooling lubricating oil flow distribution control method as described above when executing the computer program.

[0022] Fifthly, embodiments of the present invention provide a computer-readable storage medium, characterized in that the computer-readable storage medium includes a stored computer program; wherein, when the computer program is executed, it controls the device where the computer-readable storage medium is located to perform the cooling lubricating oil flow distribution control method as described above. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments of the present invention will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a cooling and lubricating oil flow distribution control system provided in the first embodiment of the present invention; Figure 2 This is a schematic diagram of the cooling lubricating oil flow distribution path in pure electric mode, as exemplified by the first embodiment of the present invention. Figure 3 This is a schematic diagram of the cooling lubricating oil flow distribution path in series mode, as exemplified by the first embodiment of the present invention. Figure 4 This is a schematic diagram of the cooling and lubricating oil flow distribution path in parallel or direct drive mode, as exemplified by the first embodiment of the present invention. Figure 5 This is a schematic diagram of a cooling and lubricating oil flow distribution control system, which is an example of an optional embodiment in the first embodiment of the present invention. Figure 6 A flowchart illustrating a cooling lubricating oil flow distribution control method provided in the second embodiment of the present invention; Figure 7 This is a schematic diagram of a cooling lubricating oil flow distribution control device provided in the third embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of an electronic device provided in the fourth embodiment of the present invention; in, Figures 1-5 The annotations in the accompanying drawings are explained as follows: 1: First switching valve; 1-1: Controlled end of the first switching valve; 2: Second switching valve; 2-1: Controlled end of the second switching valve; 3: First throttling orifice; 4: Second throttling orifice; 5: Third throttling orifice; 6: Fourth throttling orifice; 7: Fifth throttling orifice; 8: Sixth throttling orifice; 9: Main flow distribution circuit; 10: Motor flow distribution branch; 11: Engine flow distribution branch; 12: Generator flow distribution branch; 13: Boundary of the hydraulic valve body; 14: Equivalent throttling orifice of all seventh throttling orifices; 15: Equivalent throttling orifice of all eighth throttling orifices; 16: Equivalent throttling orifice of all ninth throttling orifices. Detailed Implementation

[0025] The technical solutions of the present invention will now be described with reference to the accompanying drawings in the embodiments of the present invention.

[0026] It should be noted that in the description of this invention, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Furthermore, the step numbers in the text are only for the convenience of explaining the embodiments of this invention and are not intended to limit the order in which the steps are performed. The methods provided in the embodiments of this invention can be executed by relevant terminal devices, and the following description uses the control system of a hybrid electric vehicle as the execution subject.

[0027] Please refer to Figure 1 , Figure 1 This is a schematic diagram of a cooling lubricating oil flow distribution control system provided in the first embodiment of the present invention. The first embodiment of the present invention provides a cooling lubricating oil flow distribution control system, including a first switching valve 1, a second switching valve 2, a first throttling orifice 3, a second throttling orifice 4, a third throttling orifice 5, a fourth throttling orifice 6, a fifth throttling orifice 7, and a sixth throttling orifice 8; the controlled end 1-1 of the first switching valve is connected to the oil pressure output end of the main oil circuit of the hydraulic system, and the controlled end 2-2 of the second switching valve is connected to the control pressure output end of the pilot valve of the main oil circuit of the hydraulic system; the inflow ends of the first throttling orifice 3, the second throttling orifice 4, and the third throttling orifice 5 are respectively connected to the main flow distribution circuit 9, and the flow of the first throttling orifice 3... The outlet end is connected to the motor flow distribution branch 10. The outlet end of the second throttling orifice 4 is connected to the inlet end of the fourth throttling orifice 6. The outlet end of the fourth throttling orifice 6 is connected to the engine flow distribution branch 11. The outlet end of the third throttling orifice 5 is connected to the inlet end of the first switching valve 1. The outlet end of the first switching valve 1 is connected to the inlet end of the fifth throttling orifice 7 and the second switching valve 2 respectively. The outlet end of the fifth throttling orifice 7 is connected to the generator flow distribution branch 12. The outlet end of the second switching valve 2 is connected to the inlet end of the sixth throttling orifice 8. The outlet end of the sixth throttling orifice 8 is connected to the inlet end of the fourth throttling orifice 6.

[0028] As an example, based on actual application requirements, two switching valves are selected as the first switching valve 1 and the second switching valve 2, and six throttling orifices are selected as the first throttling orifice 3, the second throttling orifice 4, the third throttling orifice 5, the fourth throttling orifice 6, the fifth throttling orifice 7 and the sixth throttling orifice 8.

[0029] Connect the controlled end 1-1 of the first switching valve to the oil pressure output end of the main oil circuit of the hydraulic system; connect the controlled end 2-2 of the second switching valve to the control pressure output end of the pilot valve of the main oil circuit of the hydraulic system; connect the inflow ends of the first throttle orifice 3, the second throttle orifice 4, and the third throttle orifice 5 to the main flow distribution circuit 9 respectively; connect the outflow end of the first throttle orifice 3 to the motor flow distribution branch circuit 10; connect the outflow end of the second throttle orifice 4 to the inflow end of the fourth throttle orifice 6; and connect the fourth throttle orifice 5... The outlet of orifice 6 is connected to the engine flow distribution branch 11. The outlet of the third throttle orifice 5 is connected to the inlet of the first switching valve 1. The outlet of the first switching valve 1 is connected to the inlet of the fifth throttle orifice 7 and the second switching valve 2 respectively. The outlet of the fifth throttle orifice 7 is connected to the generator flow distribution branch 12. The outlet of the second switching valve 2 is connected to the inlet of the sixth throttle orifice 8. The outlet of the sixth throttle orifice 8 is connected to the inlet of the fourth throttle orifice 6. The design achieves the following: Figure 1 The cooling lubricating oil flow distribution control system shown.

[0030] In a hybrid electric vehicle, a cooling lubricating oil flow distribution control system is used to control the power coupling mode of the power system. When the current power coupling mode is pure electric, the electric motor in the power system is running, while the engine and generator are both off. At this time, the electric motor itself and the reduction gear meshing with the motor's output gear require cooling lubricating oil for cooling and lubrication. Components such as the gear shifting gear connected to the engine's output shaft also require a small amount of cooling lubricating oil. In this situation, because the engine is off, the oil pump, which is always connected to the engine shaft, is also off. The oil pressure in the main hydraulic circuit is zero. The controlled end 1-1 of the first switching valve receives the oil pressure signal from the main hydraulic circuit. Since the oil pressure in the main hydraulic circuit is zero and has not reached the starting pressure of the first switching valve 1, the first switching valve 1 is closed. Furthermore, since the pilot valve control terminal of the main hydraulic circuit uses the hydraulic system's main hydraulic circuit pressure as input, and the hydraulic system's main hydraulic circuit pressure is zero, the pilot valve control pressure of the main hydraulic system's main hydraulic circuit must also be zero. The controlled terminal 2-2 of the second switching valve will receive the pilot valve control pressure signal of the main hydraulic system's main hydraulic circuit. Since the pilot valve control pressure of the main hydraulic system's main hydraulic circuit is zero and has not reached the starting pressure of the second switching valve 2, the second switching valve 2 is also in the closed state. After controlling the first switching valve 1 and the second switching valve 2 to close, the cooling and lubricating oil in the main flow distribution circuit 9 flows into the motor flow distribution branch 10 through the flow path where the first throttle orifice 3 is located, cooling and lubricating the motor itself and the reduction gear meshing with the motor on the motor flow distribution branch 10, and flowing into the engine flow distribution branch 11 through the flow paths where the second throttle orifice 4 and the fourth throttle orifice 6 are located, cooling and lubricating the engine itself and its related parts on the engine flow distribution branch 11. For example, the cooling and lubricating oil flow distribution flow path in pure electric mode is as follows: Figure 2As shown.

[0031] When the current power coupling mode is series mode, the motor in the power system is in operation, and the engine drives the generator to generate electricity to supply the motor. At this time, both the motor flow distribution branch 10 and the generator flow distribution branch 12 require a large amount of cooling lubricating oil for cooling and lubrication. However, the shaft gear branch connected to the engine does not need to transmit a large amount of power, so the amount of cooling lubricating oil required is small. The amount of cooling lubricating oil required by the generator flow distribution branch 12 is relatively small. In this situation, since the engine is running, the oil pump connected to the engine is also running. The oil pressure in the main hydraulic circuit is greater than the minimum oil pressure, which is generally 2.5 bar. By reasonably setting the starting pressure of the first switching valve 1, for example, setting the starting pressure of the first switching valve 1 to 1.5 bar, it is ensured that the first switching valve 1 can be fully opened in any operating state of the oil pump. The controlled end 1-1 of the first switching valve will receive the oil pressure signal of the main hydraulic circuit. When the oil pressure of the main hydraulic circuit reaches the starting pressure of the first switching valve 1, the first switching valve 1 is in the open state. Since the pilot valve control pressure of the main hydraulic circuit is zero at this time, the second switching valve 2 will receive the pilot valve control pressure signal of the main hydraulic circuit. Since the pilot valve control pressure of the main hydraulic circuit is zero and has not reached the starting pressure of the second switching valve 2, the second switching valve 2 is in the closed state. After the first switching valve 1 is opened and the second switching valve 2 is closed, the cooling and lubricating oil in the main flow distribution path 9 flows into the motor flow distribution branch 10 through the flow path containing the first throttling orifice 3, cooling and lubricating the motor itself and the reduction gear meshing with the motor. It then flows into the engine flow distribution branch 11 through the flow paths containing the second throttling orifice 4 and the fourth throttling orifice 6, cooling and lubricating the engine itself and its related parts. Finally, it flows into the generator flow distribution branch 12 through the flow paths containing the third throttling orifice 5, the first switching valve 1, and the fifth throttling orifice 7, cooling and lubricating the generator itself and its related parts. For example, the cooling and lubricating oil flow distribution path in series mode is as follows: Figure 3 As shown.

[0032] When the current power coupling mode is parallel or direct drive, the control system needs to adjust the oil pressure of the main hydraulic circuit according to the control command. At this time, the oil pressure of the main hydraulic circuit and the pilot valve control pressure will change. In this situation, by reasonably setting the starting pressure of the first switching valve 1 and the second switching valve 2, for example, setting the starting pressure of the second switching valve 2 to be less than or equal to the starting pressure of the first switching valve 1, it is ensured that the second switching valve 2 can open with a smaller command current controlling the pilot valve of the main hydraulic circuit. This ensures that when the pilot valve control pressure of the main hydraulic circuit reaches the starting pressure of the second switching valve 2, the oil pressure of the main hydraulic circuit will inevitably reach the starting pressure of the first switching valve 1. The controlled end 1-1 of the first switching valve will receive the oil pressure signal of the main hydraulic circuit. When the oil pressure of the main hydraulic circuit reaches the starting pressure of the first switching valve 1, the first switching valve 1 is in the open state. The second switching valve 2 will receive the pilot valve control pressure signal of the main hydraulic circuit. When the pilot valve control pressure of the main hydraulic circuit reaches the starting pressure of the second switching valve 2, the second switching valve 2 is in the open state. After the first switching valve 1 and the second switching valve 2 are opened, the cooling and lubricating oil in the main flow distribution path 9 flows into the motor flow distribution branch 10 through the flow path where the first throttle orifice 3 is located, cooling and lubricating the motor itself and the reduction gear meshing with the motor on the motor flow distribution branch 10. It then flows into the engine flow distribution branch 11 through the flow paths where the second throttle orifice 4 and the fourth throttle orifice 6 are located, and the flow paths where the third throttle orifice 5, the first switching valve 1, the second switching valve 2, and the sixth throttle orifice 8 are located, cooling and lubricating the engine itself and its related parts on the engine flow distribution branch 11. Finally, it flows into the generator flow distribution branch 12 through the flow path where the third throttle orifice 5, the first switching valve 1, and the fifth throttle orifice 7 are located, cooling and lubricating the generator itself and its related parts on the generator flow distribution branch 12. For example, the cooling and lubricating oil flow distribution flow paths in parallel mode or direct drive mode are as follows: Figure 4 As shown.

[0033] The main difference between parallel and direct drive modes lies in whether the motor participates in the drive. This state can only be reliably identified in the hydraulic system by obtaining the control signal from the control system. Therefore, designing the cooling and lubricating oil flow distribution control system by further subdividing the parallel and direct drive modes would significantly increase the cost and complexity of the cooling and lubricating oil flow distribution control system. Moreover, since parallel or direct drive modes are commonly used when the vehicle is traveling at high speeds, the engine speed is high and the oil output of the mechanical pump is large. Therefore, without further subdividing the cooling and lubricating oil flow distribution path in parallel and direct drive modes, there will be no significant power waste.

[0034] This invention employs two switching valves and six throttling orifices to design a cooling lubricating oil flow distribution control system. This system automatically distributes the cooling lubricating oil flow in the motor flow distribution branch 10, engine flow distribution branch 11, and generator flow distribution branch 12 by controlling the opening and closing states of the two switching valves in pure electric mode, series mode, parallel mode, and direct drive mode. This eliminates the need for active control by solenoid valves and enables stable, reliable, and low-cost control of the cooling lubricating oil flow distribution in multiple modes.

[0035] In an optional embodiment, the cooling lubricating oil flow distribution control system further includes at least one seventh throttling orifice, at least one eighth throttling orifice, and at least one ninth throttling orifice; all seventh throttling orifices are disposed on the motor flow distribution branch 10, all eighth throttling orifices are disposed on the engine flow distribution branch 11, and all ninth throttling orifices are disposed on the generator flow distribution branch 12.

[0036] As an example, considering the connection relationship between the motor itself and the reduction gear meshing with the motor on the motor flow distribution branch 10, at least one seventh throttle orifice is added to the motor flow distribution branch 10; considering the connection relationship between the engine itself and its related parts on the engine flow distribution branch 11, at least one eighth throttle orifice is added to the engine flow distribution branch 11; and considering the connection relationship between the generator itself and its related parts on the generator flow distribution branch 12, at least one ninth throttle orifice is added to the generator flow distribution branch 12, resulting in the design as follows: Figure 5 The cooling lubricating oil flow distribution control system shown.

[0037] By adding at least one seventh throttle orifice to the motor flow distribution branch 10, the amount of cooling and lubricating oil for the motor itself and the reduction gear meshing with the motor can be subdivided. By adding at least one eighth throttle orifice to the engine flow distribution branch 11, the amount of cooling and lubricating oil for the engine itself and its related parts can be subdivided. By adding at least one ninth throttle control to the generator flow distribution branch 12, the amount of cooling and lubricating oil for the generator itself and its related parts can be subdivided.

[0038] This invention provides a cooling and lubricating oil flow distribution control system by adding at least one seventh throttling orifice to the motor flow distribution branch 10, at least one eighth throttling orifice to the engine flow distribution branch 11, and at least one ninth throttling orifice to the generator flow distribution branch 12. This system can precisely control the flow distribution of cooling and lubricating oil in the motor flow distribution branch 10, engine flow distribution branch 11, and generator flow distribution branch 12.

[0039] In an optional embodiment, the motor flow distribution branch 10 is used to provide cooling and lubricating oil to the motor and the reduction gear meshing with the motor, the engine flow distribution branch 11 is used to provide cooling and lubricating oil to the engine, and the generator flow distribution branch 12 is used to provide cooling and lubricating oil to the generator.

[0040] As an example, considering that the motor and the reduction gear meshing with the motor require cooling lubricating oil for cooling and lubrication in pure electric mode, series mode, parallel mode, and direct drive mode, by setting the motor and the reduction gear meshing with the motor as a whole on the motor flow distribution branch 10, the flow rate of cooling lubricating oil on the shaft gear can be adjusted according to the amount of power transmitted, avoiding large power waste. Furthermore, by using the motor flow distribution branch 10 as a continuous branch in the cooling lubricating oil flow distribution control system, the cooling lubricating oil in the main flow distribution road 9 can flow preferentially into the motor flow distribution branch 10, which is very much in line with the new energy hybrid route that is mainly based on plug-in hybrid electric vehicles.

[0041] This invention provides cooling and lubricating oil distribution in multiple modes by designing a motor flow distribution branch 10 to supply cooling and lubricating oil to the motor and the reduction gear meshing with the motor, an engine flow distribution branch 11 to supply cooling and lubricating oil to the engine, and a generator flow distribution branch 12 to supply cooling and lubricating oil to the generator. This allows for more stable, reliable, and cost-effective control of cooling and lubricating oil flow distribution in multiple modes.

[0042] In an optional embodiment, the starting pressures of both the first switching valve 1 and the second switching valve 2 are within a preset pressure range, and the starting pressure of the first switching valve 1 is greater than or equal to the starting pressure of the second switching valve 2.

[0043] As an example, in order to ensure that the first switching valve 1 can be opened and the second switching valve 2 can be closed in series mode, and that the first switching valve 1 and the second switching valve 2 can be opened in parallel mode and direct drive mode, the starting pressure of the first switching valve 1 and the second switching valve 2 needs to be set reasonably.

[0044] By setting the starting pressures of both the first switching valve 1 and the second switching valve 2 to be within a preset pressure range, and ensuring that the starting pressure of the first switching valve 1 is greater than or equal to the starting pressure of the second switching valve 2, it is possible not only to reliably control the opening and closing states of the first switching valve 1 and the second switching valve 2 in multiple modes, but also to ensure that the opening size of the first switching valve 1 will not change significantly due to oil pressure fluctuations in the main oil circuit of the hydraulic system, and that the opening size of the second switching valve 2 will not change significantly due to pilot valve control pressure fluctuations in the main oil circuit of the hydraulic system.

[0045] The embodiments of the present invention ensure stable and reliable control of the opening and closing states of the first switching valve 1 and the second switching valve 2 under various modes by setting the starting pressure of both the first switching valve 1 and the second switching valve 2 to be within a preset pressure range, and the starting pressure of the first switching valve 1 being greater than or equal to the starting pressure of the second switching valve 2.

[0046] In an optional embodiment, the preset pressure range is [1 bar, 2 bar].

[0047] As an example, considering that the minimum oil pressure in the main hydraulic circuit of the hydraulic system is generally 2.5 bar when the oil pump connected to the engine is running, by setting the preset pressure range to [1 bar, 2 bar], for example, setting the starting pressure of the first switching valve 1 to 1.5 bar and the starting pressure of the second switching valve 2 to any value in (0, 1.5 bar), it can not only ensure that the first switching valve 1 can be fully opened in any operating state of the oil pump, but also ensure that when the pilot valve control pressure of the main hydraulic circuit of the hydraulic system reaches the starting pressure of the second switching valve 2, the oil pressure in the main hydraulic circuit of the hydraulic system will necessarily reach the starting pressure of the first switching valve 1. By setting the preset pressure range to [1 bar, 2 bar], this embodiment of the invention can ensure stable and reliable control of the opening and closing states of the first switching valve 1 and the second switching valve 2 in multiple modes.

[0048] In an optional embodiment, the first throttling orifice 3, the second throttling orifice 4, the third throttling orifice 5, the fourth throttling orifice 6, the fifth throttling orifice 7, and the sixth throttling orifice 8 are all adjustable orifices.

[0049] As an example, six adjustable flow orifices are selected as the first throttling orifice 3, the second throttling orifice 4, the third throttling orifice 5, the fourth throttling orifice 6, the fifth throttling orifice 7, and the sixth throttling orifice 8.

[0050] A cooling and lubricating oil flow distribution control system is applied to the hybrid electric vehicle's control system to control the power coupling mode of the power system. When the current power coupling mode is pure electric mode, the first switching valve 1 and the second switching valve 2 are closed. The cooling and lubricating oil in the main flow distribution path 9 flows into the motor flow distribution branch 10 through the flow path containing the first throttling orifice 3, cooling and lubricating the motor itself and the reduction gear meshing with the motor. It also flows into the engine flow distribution branch 11 through the flow paths containing the second throttling orifice 4 and the fourth throttling orifice 6, cooling and lubricating the engine itself and its related components. Considering that the motor flow distribution branch 10 requires a larger flow of cooling and lubricating oil than the engine flow distribution branch 11, the orifice diameter ratio of the first throttling orifice 3 and the second throttling orifice 4 can be adjusted according to actual application needs. This satisfies the cooling and lubrication requirements of both the motor and engine flow distribution branches 10 while avoiding excessive cooling and lubricating oil in either branch, thus preventing energy waste.

[0051] When the current power coupling mode is series mode, after the first switching valve 1 is opened and the second switching valve 2 is closed, the cooling and lubricating oil in the main flow distribution circuit 9 flows into the motor flow distribution branch 10 through the flow path where the first throttle orifice 3 is located, cooling and lubricating the motor itself and the reduction gear meshing with the motor on the motor flow distribution branch 10. It then flows into the engine flow distribution branch 11 through the flow paths where the second throttle orifice 4 and the fourth throttle orifice 6 are located, cooling and lubricating the engine itself and its related parts on the engine flow distribution branch 11. Finally, it flows into the generator flow distribution branch 12 through the flow paths where the third throttle orifice 5, the first switching valve 1, and the fifth throttle orifice 7 are located, cooling and lubricating the generator itself and its related parts on the generator flow distribution branch 12. Considering that the motor flow distribution branch 10 requires a large flow of cooling and lubricating oil, the engine flow distribution branch 11 requires a small flow of cooling and lubricating oil, and the generator flow distribution branch 12 requires a large flow of cooling and lubricating oil, the diameter of the third throttling orifice 5 can be set according to actual application requirements. Under the premise of ensuring that the cooling and lubricating oil flow obtained by the motor flow distribution branch 10 and the engine flow distribution branch 11 in pure electric mode is not changed, all the cooling and lubricating oil flow added in the main flow distribution branch 9 is directed to the generator flow distribution branch 12 to avoid large power waste.

[0052] When the current power coupling mode is parallel mode or direct drive mode, the first switching valve 1 and the second switching valve 2 are opened. The cooling and lubricating oil in the main flow distribution circuit 9 flows into the motor flow distribution branch 10 through the flow path where the first throttle orifice 3 is located, cooling and lubricating the motor itself and the reduction gear meshing with the motor on the motor flow distribution branch 10. It then flows into the engine flow distribution branch 11 through the flow paths where the second throttle orifice 4 and the fourth throttle orifice 6 are located, and the third throttle orifice 5, the first switching valve 1, the second switching valve 2, and the sixth throttle orifice 8 are located, cooling and lubricating the engine itself and its related parts on the engine flow distribution branch 11. Finally, it flows into the generator flow distribution branch 12 through the flow path where the third throttle orifice 5, the first switching valve 1, and the fifth throttle orifice 7 are located, cooling and lubricating the generator itself and its related parts on the generator flow distribution branch 12. In particular, considering that the generator generally does not participate in power generation in parallel mode and direct drive mode, the cooling and lubricating oil flow required by the generator flow distribution branch 12 is relatively small. The orifice size of the fifth throttle orifice 7 can be set according to the actual application requirements. When the second switch valve 2 is open, most of the cooling and lubricating oil flow distributed to the generator flow distribution branch 12 in series mode is merged into the engine flow distribution branch 11 to meet the cooling and lubrication requirements of related gears, bearings, etc. when transmitting high power, without the need to increase the cooling and lubricating oil flow in the main flow distribution branch 9.

[0053] The embodiments of the present invention select six adjustable flow orifices as the first throttling orifice 3, the second throttling orifice 4, the third throttling orifice 5, the fourth throttling orifice 6, the fifth throttling orifice 7 and the sixth throttling orifice 8, which can flexibly control the distribution of cooling lubricating oil flow in multiple modes.

[0054] In an optional embodiment, all seventh, eighth, and ninth flow orifices are adjustable flow orifices.

[0055] As an example, multiple adjustable orifices are selected as all seventh orifices, all eighth orifices, and all ninth orifices.

[0056] By adding at least one adjustable flow orifice to the motor flow distribution branch 10, the amount of cooling and lubricating oil in the motor itself and the reduction gear meshing with the motor can be adjusted according to actual application requirements. By adding at least one adjustable flow orifice to the engine flow distribution branch 11, the amount of cooling and lubricating oil in the engine itself and its related parts can be adjusted according to actual application requirements. By adding at least one adjustable flow orifice to the generator flow distribution branch 12, the amount of cooling and lubricating oil in the generator itself and its related parts can be adjusted according to actual application requirements.

[0057] The embodiments of the present invention, by selecting multiple adjustable flow orifices as all seventh flow orifices, all eighth flow orifices, and all ninth flow orifices, can flexibly control the flow distribution of cooling and lubricating oil on the motor flow distribution branch 10, the engine flow distribution branch 11, and the generator flow distribution branch 12.

[0058] Please refer to Figure 6 , Figure 6 This is a flowchart illustrating a cooling lubricating oil flow distribution control method according to a second embodiment of the present invention. The second embodiment of the present invention provides a cooling lubricating oil flow distribution control method, applied to the cooling lubricating oil flow distribution control system as described in the first embodiment of the present invention, specifically including steps S201~S204: S201. Real-time transmission of the hydraulic system main oil circuit oil pressure to the first switching valve 1, and real-time transmission of the pilot valve control pressure of the hydraulic system main oil circuit to the second switching valve 2. S202. When the oil pressure of the main oil circuit of the hydraulic system is less than the starting pressure of the first switching valve 1 and the control pressure of the pilot valve of the hydraulic system is less than the starting pressure of the second switching valve 2, the first switching valve 1 and the second switching valve 2 are triggered to close, so that the cooling lubricating oil in the main flow distribution circuit 9 flows into the motor flow distribution branch 10 through the flow path where the first throttle orifice 3 is located, and flows into the engine flow distribution branch 11 through the flow paths where the second throttle orifice 4 and the fourth throttle orifice 6 are located. S203. When the oil pressure of the main oil circuit of the hydraulic system is greater than or equal to the starting pressure of the first switching valve 1, and the pilot valve control pressure of the main oil circuit of the hydraulic system is less than the starting pressure of the second switching valve 2, the first switching valve 1 is triggered to open and the second switching valve 2 is triggered to close, so that the cooling lubricating oil in the main flow distribution circuit 9 flows into the motor flow distribution branch 10 through the flow path where the first throttle orifice 3 is located, flows into the engine flow distribution branch 11 through the flow paths where the second throttle orifice 4 and the fourth throttle orifice 6 are located, and flows into the generator flow distribution branch 12 through the flow paths where the third throttle orifice 5, the first switching valve 1 and the fifth throttle orifice 7 are located. S204. When the oil pressure of the main oil circuit of the hydraulic system is greater than or equal to the starting pressure of the first switching valve 1, and the pilot valve control pressure of the main oil circuit of the hydraulic system is greater than or equal to the starting pressure of the second switching valve 2, the first switching valve 1 and the second switching valve 2 are triggered to open, so that the cooling lubricating oil in the main flow distribution circuit 9 flows into the motor flow distribution branch 10 through the flow path where the first throttle orifice 3 is located, and flows into the engine flow distribution branch 11 through the flow paths where the second throttle orifice 4 and the fourth throttle orifice 6 are located and the third throttle orifice 5, the first switching valve 1, the second switching valve 2, and the sixth throttle orifice 8 are located, and flows into the generator flow distribution branch 12 through the flow paths where the third throttle orifice 5, the first switching valve 1, and the fifth throttle orifice 7 are located.

[0059] As an example, by applying the cooling and lubricating oil flow distribution control system as described in the first embodiment of the present invention, the control system of the hybrid vehicle transmits the oil pressure of the main oil circuit of the hydraulic system to the first switching valve 1 in real time, and transmits the pilot valve control pressure of the main oil circuit of the hydraulic system to the second switching valve 2 in real time.

[0060] When the oil pressure in the main hydraulic circuit is less than the starting pressure of the first switching valve 1, and the control pressure of the pilot valve in the hydraulic system is less than the starting pressure of the second switching valve 2, the first switching valve 1 and the second switching valve 2 are triggered to close, so that the cooling and lubricating oil in the main flow distribution circuit 9 flows into the motor flow distribution branch circuit 10 through the flow path where the first throttle orifice 3 is located, to cool and lubricate the motor itself and the reduction gear meshing with the motor on the motor flow distribution branch circuit 10, and flows into the engine flow distribution branch circuit 11 through the flow paths where the second throttle orifice 4 and the fourth throttle orifice 6 are located, to cool and lubricate the engine itself and its related parts on the engine flow distribution branch circuit 11.

[0061] When the oil pressure in the main hydraulic circuit is greater than or equal to the starting pressure of the first switching valve 1, and the pilot valve control pressure in the main hydraulic circuit is less than the starting pressure of the second switching valve 2, the first switching valve 1 is triggered to open, and the second switching valve 2 is triggered to close. This causes the cooling and lubricating oil in the main flow distribution circuit 9 to flow into the motor flow distribution branch 10 through the flow path where the first throttle orifice 3 is located, thus cooling and lubricating the motor itself and the reduction gear meshing with the motor on the motor flow distribution branch 10. The oil then flows into the engine flow distribution branch 11 through the flow paths where the second throttle orifice 4 and the fourth throttle orifice 6 are located, thus cooling and lubricating the engine itself and its related parts on the engine flow distribution branch 11. Finally, the oil flows into the generator flow distribution branch 12 through the flow paths where the third throttle orifice 5, the first switching valve 1, and the fifth throttle orifice 7 are located, thus cooling and lubricating the generator itself and its related parts on the generator flow distribution branch 12.

[0062] When the oil pressure in the main hydraulic circuit is greater than or equal to the starting pressure of the first switching valve 1, and the pilot valve control pressure in the main hydraulic circuit is greater than or equal to the starting pressure of the second switching valve 2, the first switching valve 1 and the second switching valve 2 are triggered to open, allowing the cooling and lubricating oil in the main flow distribution circuit 9 to flow into the motor flow distribution branch 10 through the flow path where the first throttle orifice 3 is located. This cools and lubricates the motor itself and the reduction gear meshing with the motor on the motor flow distribution branch 10. The oil then flows into the engine flow distribution branch 11 through the flow paths where the second throttle orifice 4 and the fourth throttle orifice 6 are located, and the third throttle orifice 5, the first switching valve 1, the second switching valve 2, and the sixth throttle orifice 8 are located. This cools and lubricates the engine itself and its related parts on the engine flow distribution branch 11. Finally, the oil flows into the generator flow distribution branch 12 through the flow paths where the third throttle orifice 5, the first switching valve 1, and the fifth throttle orifice 7 are located. This cools and lubricates the generator itself and its related parts on the generator flow distribution branch 12.

[0063] This invention employs a cooling and lubricating oil flow distribution control system to transmit the oil pressure of the main hydraulic circuit to the first switching valve 1 in real time, and to transmit the pilot valve control pressure of the main hydraulic circuit to the second switching valve 2 in real time. It controls the opening and closing states of the two switching valves in pure electric mode, series mode, parallel mode, and direct drive mode to automatically distribute the cooling and lubricating oil flow in the motor flow distribution branch 10, engine flow distribution branch 11, and generator flow distribution branch 12. This allows for stable, reliable, and low-cost control of the cooling and lubricating oil flow distribution in multiple modes.

[0064] Please refer to Figure 7 , Figure 7This is a schematic diagram of a cooling and lubricating oil flow distribution control device provided in the third embodiment of the present invention. The third embodiment of the present invention provides a cooling lubricating oil flow distribution control device, applied to the cooling lubricating oil flow distribution control system as described in the first embodiment of the present invention, comprising: an acquisition module 301, used to transmit the oil pressure of the main oil circuit of the hydraulic system to the first switching valve 1 in real time, and to transmit the pilot valve control pressure of the main oil circuit of the hydraulic system to the second switching valve 2 in real time; a control module 302, used to trigger the first switching valve 1 and the second switching valve 2 to close when the oil pressure of the main oil circuit of the hydraulic system is less than the starting pressure of the first switching valve 1 and the pilot valve control pressure of the hydraulic system is less than the starting pressure of the second switching valve 2, so that the cooling lubricating oil in the main flow distribution circuit 9 flows into the motor flow distribution branch 10 through the flow path where the first throttle orifice 3 is located, and flows into the engine flow distribution branch 11 through the flow paths where the second throttle orifice 4 and the fourth throttle orifice 6 are located; the control module 302 is further used to trigger the first switching valve 1 to open and the second switching valve 2 to close when the oil pressure of the main oil circuit of the hydraulic system is greater than or equal to the starting pressure of the first switching valve 1 and the pilot valve control pressure of the main oil circuit of the hydraulic system is less than the starting pressure of the second switching valve 2. When switch valve 2 is closed, the cooling and lubricating oil in the main flow distribution circuit 9 flows into the motor flow distribution branch 10 through the flow path containing the first throttle orifice 3, into the engine flow distribution branch 11 through the flow paths containing the second throttle orifice 4 and the fourth throttle orifice 6, and into the generator flow distribution branch 12 through the flow paths containing the third throttle orifice 5, the first switch valve 1, and the fifth throttle orifice 7. The control module 302 is also used when the oil pressure in the main hydraulic circuit is greater than or equal to the starting pressure of the first switch valve 1, and the pilot valve control pressure in the main hydraulic circuit is greater than or equal to... When the starting pressure of the second switching valve 2 is reached, it triggers the opening of the first switching valve 1 and the second switching valve 2, causing the cooling lubricating oil in the main flow distribution circuit 9 to flow into the motor flow distribution branch circuit 10 through the flow path where the first throttle orifice 3 is located, and then into the engine flow distribution branch circuit 11 through the flow paths where the second throttle orifice 4 and the fourth throttle orifice 6 are located, and the third throttle orifice 5, the first switching valve 1, the second switching valve 2, and the sixth throttle orifice 8 are located, and finally into the generator flow distribution branch circuit 12 through the flow paths where the third throttle orifice 5, the first switching valve 1, and the fifth throttle orifice 7 are located.

[0065] The specific implementation process of the functions and roles of each module in the above device can be found in the implementation process of the corresponding steps in the above method, and will not be repeated here.

[0066] Please refer to Figure 8 , Figure 8This is a schematic diagram of the structure of an electronic device provided in the fourth embodiment of the present invention. The third embodiment of the present invention provides an electronic device 40, including a processor 401, a memory 402, and a computer program stored in the memory 402 and configured to be executed by the processor 401; the memory 402 is coupled to the processor 401, and when the processor 401 executes the computer program, it implements the cooling lubricating oil flow distribution control method as described in the second embodiment of the present invention.

[0067] When the processor 401 reads and executes the computer program from the memory 402 via the bus 404, it can implement any of the methods included in the cooling lubricating oil flow distribution control method described in the second embodiment of the present invention.

[0068] Processor 401 can process digital signals and can include various computing architectures. For example, it can be a complex instruction set computer architecture, a reduced instruction set computer architecture, or an architecture that implements multiple instruction set combinations. In some examples, processor 401 can be a microprocessor.

[0069] The memory 402 can be used to store instructions executed by the processor 401 or data related to the execution of instructions. These instructions and / or data may include code for implementing some or all of the functions of one or more modules described in the embodiments of the present invention. The processor 401 of this disclosure embodiment can be used to execute instructions in the memory 402 to implement the cooling lubricating oil flow distribution control method as described in the second embodiment of the present invention. The memory 402 includes dynamic random access memory, static random access memory, flash memory, optical memory, or other memories well known to those skilled in the art.

[0070] The fifth embodiment of the present invention provides a computer-readable storage medium, which includes a stored computer program; wherein, when the computer program is running, it controls the device where the computer-readable storage medium is located to execute the cooling lubricating oil flow distribution control method as described in the second embodiment of the present invention, and can achieve the same beneficial effect.

[0071] In summary, the embodiments of the present invention provide a cooling lubricating oil flow distribution control system, method, apparatus, equipment, and medium. The cooling lubricating oil flow distribution control system includes: a first switching valve 1, a second switching valve 2, a first throttling orifice 3, a second throttling orifice 4, a third throttling orifice 5, a fourth throttling orifice 6, a fifth throttling orifice 7, and a sixth throttling orifice 8; the controlled end 1-1 of the first switching valve is connected to the oil pressure output end of the main oil circuit of the hydraulic system, and the controlled end 2-2 of the second switching valve is connected to the control pressure output end of the pilot valve of the main oil circuit of the hydraulic system; the inflow ends of the first throttling orifice 3, the second throttling orifice 4, and the third throttling orifice 5 are respectively connected to the flow... The main flow distribution route 9 has the following connections: the outlet of the first throttle orifice 3 is connected to the motor flow distribution branch 10; the outlet of the second throttle orifice 4 is connected to the inlet of the fourth throttle orifice 6; the outlet of the fourth throttle orifice 6 is connected to the engine flow distribution branch 11; the outlet of the third throttle orifice 5 is connected to the inlet of the first switching valve 1; the outlet of the first switching valve 1 is connected to the inlet of the fifth throttle orifice 7 and the second switching valve 2; the outlet of the fifth throttle orifice 7 is connected to the generator flow distribution branch 12; the outlet of the second switching valve 2 is connected to the inlet of the sixth throttle orifice 8; and the outlet of the sixth throttle orifice 8 is connected to the inlet of the fourth throttle orifice 6. This invention employs two switching valves and six throttling orifices to design a cooling lubricating oil flow distribution control system. This system automatically distributes the cooling lubricating oil flow in the motor flow distribution branch 10, engine flow distribution branch 11, and generator flow distribution branch 12 by controlling the opening and closing states of the two switching valves in pure electric mode, series mode, parallel mode, and direct drive mode. This eliminates the need for active control by solenoid valves and enables stable, reliable, and low-cost control of the cooling lubricating oil flow distribution in multiple modes.

[0072] In the several embodiments provided by this invention, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative; for example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0073] In addition, the functional modules in the various embodiments of the present invention can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0074] If the aforementioned functions are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0075] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A cooling lubricant flow distribution control system characterized by, It includes a first switching valve, a second switching valve, a first throttling orifice, a second throttling orifice, a third throttling orifice, a fourth throttling orifice, a fifth throttling orifice, and a sixth throttling orifice; The controlled end of the first switching valve is connected to the oil pressure output end of the main oil circuit of the hydraulic system, and the controlled end of the second switching valve is connected to the control pressure output end of the pilot valve of the main oil circuit of the hydraulic system. The inflow ends of the first, second, and third throttling orifices are respectively connected to the main flow distribution circuit. The outflow end of the first throttling orifice is connected to the motor flow distribution branch. The outflow end of the second throttling orifice is connected to the inflow end of the fourth throttling orifice. The outflow end of the fourth throttling orifice is connected to the engine flow distribution branch. The outflow end of the third throttling orifice is connected to the inflow end of the first switching valve. The outflow end of the first switching valve is connected to the inflow ends of the fifth throttling orifice and the second switching valve, respectively. The outflow end of the fifth throttling orifice is connected to the generator flow distribution branch. The outflow end of the second switching valve is connected to the inflow end of the sixth throttling orifice. The outflow end of the sixth throttling orifice is connected to the inflow end of the fourth throttling orifice.

2. The cooling lubricating oil flow distribution control system according to claim 1, characterized in that, It also includes at least one seventh orifice, at least one eighth orifice, and at least one ninth orifice; All of the seventh throttling orifices are located on the motor flow distribution branch, all of the eighth throttling orifices are located on the engine flow distribution branch, and all of the ninth throttling orifices are located on the generator flow distribution branch.

3. The cooling lubricating oil flow distribution control system according to claim 1 or 2, characterized in that, The motor flow distribution branch is used to provide cooling and lubricating oil to the motor and the reduction gear meshing with the motor, the engine flow distribution branch is used to provide cooling and lubricating oil to the engine, and the generator flow distribution branch is used to provide cooling and lubricating oil to the generator.

4. The cooling lubricating oil flow distribution control system according to claim 1, characterized in that, The starting pressures of both the first and second switching valves are within a preset pressure range, and the starting pressure of the first switching valve is greater than or equal to the starting pressure of the second switching valve.

5. The cooling lubricating oil flow distribution control system according to claim 4, characterized in that, The preset pressure range is [1 bar, 2 bar].

6. The cooling lubricating oil flow distribution control system according to claim 1, characterized in that, The first throttling orifice, the second throttling orifice, the third throttling orifice, the fourth throttling orifice, the fifth throttling orifice, and the sixth throttling orifice are all adjustable orifices.

7. The cooling lubricating oil flow distribution control system according to claim 2, characterized in that, All of the seventh, eighth, and ninth flow orifices are adjustable flow orifices.

8. A method for controlling the flow distribution of cooling lubricating oil, characterized in that, The cooling lubricating oil flow distribution control system according to any one of claims 1 to 7 specifically includes: The hydraulic system transmits the oil pressure of the main oil circuit of the hydraulic system to the first switching valve in real time, and transmits the pilot valve control pressure of the main oil circuit of the hydraulic system to the second switching valve in real time. When the oil pressure in the main oil circuit of the hydraulic system is less than the starting pressure of the first switching valve, and the control pressure of the pilot valve of the hydraulic system is less than the starting pressure of the second switching valve, the first switching valve and the second switching valve are triggered to close, so that the cooling lubricating oil in the main flow distribution circuit flows into the motor flow distribution branch through the flow path where the first throttle orifice is located, and flows into the engine flow distribution branch through the flow paths where the second throttle orifice and the fourth throttle orifice are located; When the oil pressure of the main oil circuit of the hydraulic system is greater than or equal to the starting pressure of the first switching valve, and the pilot valve control pressure of the main oil circuit of the hydraulic system is less than the starting pressure of the second switching valve, the first switching valve is triggered to open and the second switching valve is triggered to close, so that the cooling lubricating oil in the main flow distribution circuit flows into the motor flow distribution branch through the flow path where the first throttle orifice is located, flows into the engine flow distribution branch through the flow paths where the second throttle orifice and the fourth throttle orifice are located, and flows into the generator flow distribution branch through the flow paths where the third throttle orifice, the first switching valve and the fifth throttle orifice are located; When the oil pressure in the main oil circuit of the hydraulic system is greater than or equal to the starting pressure of the first switching valve, and the pilot valve control pressure in the main oil circuit of the hydraulic system is greater than or equal to the starting pressure of the second switching valve, the first switching valve and the second switching valve are triggered to open, so that the cooling lubricating oil in the main flow distribution circuit flows into the motor flow distribution branch through the flow path where the first throttle orifice is located, and flows into the engine flow distribution branch through the flow paths where the second throttle orifice, the fourth throttle orifice, the third throttle orifice, the first switching valve, the second switching valve, and the sixth throttle orifice are located, and flows into the generator flow distribution branch through the flow paths where the third throttle orifice, the first switching valve, and the fifth throttle orifice are located.

9. A cooling lubricating oil flow distribution control device, characterized in that, The cooling lubricating oil flow distribution control system according to any one of claims 1 to 7 comprises: The acquisition module is used to transmit the oil pressure of the main oil circuit of the hydraulic system to the first switching valve in real time, and to transmit the pilot valve control pressure of the main oil circuit of the hydraulic system to the second switching valve in real time. The control module is used to trigger the first and second switching valves to close when the oil pressure in the main oil circuit of the hydraulic system is less than the starting pressure of the first switching valve and the control pressure of the pilot valve of the hydraulic system is less than the starting pressure of the second switching valve, so that the cooling lubricating oil in the main flow distribution circuit flows into the motor flow distribution branch through the flow path where the first throttle orifice is located, and flows into the engine flow distribution branch through the flow paths where the second throttle orifice and the fourth throttle orifice are located; The control module is further configured to trigger the opening of the first switching valve and the closing of the second switching valve when the oil pressure of the main oil circuit of the hydraulic system is greater than or equal to the starting pressure of the first switching valve and the pilot valve control pressure of the main oil circuit of the hydraulic system is less than the starting pressure of the second switching valve, so that the cooling lubricating oil in the main flow distribution circuit flows into the motor flow distribution branch through the flow path where the first throttle orifice is located, flows into the engine flow distribution branch through the flow paths where the second throttle orifice and the fourth throttle orifice are located, and flows into the generator flow distribution branch through the flow paths where the third throttle orifice, the first switching valve and the fifth throttle orifice are located; The control module is further configured to trigger the opening of the first and second switching valves when the oil pressure of the main oil circuit of the hydraulic system is greater than or equal to the starting pressure of the first switching valve and the pilot valve control pressure of the main oil circuit of the hydraulic system is greater than or equal to the starting pressure of the second switching valve, so that the cooling lubricating oil in the main flow distribution circuit flows into the motor flow distribution branch through the flow path where the first throttle orifice is located, merges into the engine flow distribution branch through the flow paths where the second throttle orifice, the fourth throttle orifice, the third throttle orifice, the first switching valve, the second switching valve, and the sixth throttle orifice are located, and flows into the generator flow distribution branch through the flow paths where the third throttle orifice, the first switching valve, and the fifth throttle orifice are located.

10. An electronic device, characterized in that, It includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor; the memory is coupled to the processor, and the processor, when executing the computer program, implements the cooling lubricating oil flow distribution control method according to claim 8.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored computer program; wherein, when the computer program is executed, it controls the device containing the computer-readable storage medium to perform the cooling lubricating oil flow distribution control method according to claim 8.

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