Hydraulic systems and automobiles

Abstract

This application relates to the technical field of automotive lubrication and cooling, and more particularly to a hydraulic system and automobile including a generator, a drive motor, an electric pump, a first lubrication assembly, a mechanical pump, and a second lubrication assembly. The first lubrication assembly communicates with the first rotor via a first pressure valve and with the second rotor via a second pressure valve. The output terminal of the second lubrication assembly communicates with the output terminal of the first lubrication assembly via a third pressure valve, and the one direction refers to the direction from the output terminal of the second lubrication assembly to the output terminal of the first lubrication assembly.

Description

Technical Field

[0001] This application relates to the technical field of automotive lubrication and cooling, and particularly to hydraulic systems and automobiles.

Background Art

[0002] An automobile generates a means of transportation that assists the movement of users by the coordinated operation of multiple components.

[0003] An automobile includes a drive motor, a generator, and an oil pump. The drive motor and the generator operate to generate heat, and the oil pump supplies oil for lubrication and cooling to the drive motor and the generator.

[0004] In related technologies, in order to maintain the normal operation of the generator and the drive motor, the oil pump generally consumes a large amount of energy and is prone to overheating. As a result, the power is limited.

Summary of the Invention

[0005] This application provides a hydraulic system and an automobile, including the following technical solutions.

[0006] The first aspect of this application provides a hydraulic system including a generator, a drive motor, an electric pump, a first oil supply assembly, a mechanical pump, and a second oil supply assembly. Among them, the above generator includes a first rotor and a first stator. The above drive motor includes a second rotor and a second stator. The above electric pump is used to pump oil to the first rotor, the second rotor, and the second stator through the above first oil supply assembly. The above first oil supply assembly communicates with the above first rotor through a first pressure valve and communicates with the above second rotor through a second pressure valve. The above mechanical pump is used to pump oil to the first rotor, the second rotor, the second stator, the first stator, and the output end of the above first oil supply assembly through the above second oil supply assembly. The output end of the above second oil supply assembly communicates with the output end of the above first oil supply assembly through a third pressure valve. In one directionThey are in communication, and the aforementioned one direction refers to the direction from the output terminal of the second lubrication assembly to the output terminal of the first lubrication assembly.

[0007] In some embodiments, the first lubrication assembly includes a bypass valve and an oil cooler, the bypass valve connecting the output terminal of the first lubrication assembly to the electric pump, and the oil cooler connecting the output terminal of the first lubrication assembly to the electric pump.

[0008] In some embodiments, the first lubrication assembly further includes a first one-way valve and a second one-way valve, the first one-way valve communicating the electric pump and the bypass valve, and the electric pump and the oil cooler, and the second one-way valve communicating the bypass valve and the oil cooler.

[0009] In some embodiments, the second lubrication assembly includes a fourth pressure valve and a control valve, the fourth pressure valve communicating the mechanical pump and the first stator, the fourth pressure valve being used to allow or prevent the mechanical pump from supplying oil to the first stator, and the control valve communicating the mechanical pump and the fourth pressure valve to control the opening of the fourth pressure valve.

[0010] In some embodiments, the hydraulic system includes a clutch, the second lubrication assembly further includes an on-off valve, the on-off valve connects the mechanical pump and the clutch.

[0011] In some embodiments, the hydraulic system includes a clutch, and both the first lubrication assembly and the second lubrication assembly communicate with the clutch.

[0012] In some embodiments, the hydraulic system includes a relief valve, which is located between the third pressure valve and the second lubrication assembly and communicates with the output terminals of the third pressure valve and the second lubrication assembly, respectively.

[0013] In some embodiments, when the electric pump and the mechanical pump are operated simultaneously, the hydraulic pressure at the output terminal of the first lubrication assembly is lower than the hydraulic pressure at the output terminal of the second lubrication assembly.

[0014] In some embodiments, the hydraulic system includes a controller, which is signal-connected to the electric pump and the mechanical pump, respectively. The controller is configured to control the oil flow rate output by the electric pump and the oil flow rate output by the mechanical pump, respectively, so that the oil pressure at the output terminal of the first lubrication assembly is less than the oil pressure at the output terminal of the second lubrication assembly.

[0015] In some embodiments, the controller is signal-connected to the first pressure valve and is configured to control the opening of the first pressure valve such that the ratio of the oil flow rate of the first stator to the oil flow rate of the first rotor is 4:1 or greater, and / or The controller described above is connected to the second pressure valve and is configured to control the opening degree of the second pressure valve so that the ratio of the oil flow rate of the second stator to the oil flow rate of the second rotor is 4:1 or greater.

[0016] A second aspect of the present application provides an automobile including the hydraulic system described in the first aspect. [Brief explanation of the drawing]

[0017] To more clearly explain the technical concept in the embodiments of this application, the drawings necessary for describing the embodiments are briefly introduced below. Clearly, the drawings in the following description are only a few embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any creative work. [Figure 1] This is a schematic diagram of the structure of the hydraulic system provided by the embodiment of the present invention. [Figure 2]This is a schematic diagram of the operation of the first hydraulic system provided by the embodiment of the present application. [Figure 3] This is a schematic diagram illustrating the operation of a second hydraulic system provided by an embodiment of the present invention. [Figure 4] This is a schematic diagram illustrating the operation of the third hydraulic system provided by the embodiment of the present application. [Figure 5] This is a schematic diagram of the control architecture of the controller provided by the embodiment of the present invention.

[0018] The drawings above clearly illustrate embodiments of the present application, which are described in more detail below. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but rather to explain the concept of the present application to those skilled in the art by referring to specific embodiments. [Modes for carrying out the invention]

[0019] The technical concepts described below will be clearly and completely explained in accordance with the drawings of the embodiments of this application. However, it is clear that the embodiments described are only a selection of embodiments of this application, not all of them. All other embodiments obtained based on the embodiments of this application without the creative work of a person skilled in the art fall within the scope of protection of this application.

[0020] The directional nouns such as "up," "down," and "side" in the embodiments of this application are generally based on the relative relationship of directions shown in Figure 1, and the use of these directional nouns is merely to more clearly explain the relationship between structures, and not to explain absolute directions. When products are placed in different orientations, the directions may change, and for example, "up" and "down" may be swapped.

[0021] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as those generally understood by those skilled in the art.

[0022] To make the technical solution and advantages of the present application clearer, the embodiments of the present application will be described in more detail below in combination with the drawings.

[0023] The first aspect of the present application provides a hydraulic system. As shown in FIG. 1, the hydraulic system includes a generator 1, a drive motor 2, an electric pump 3, a first oil supply assembly 4, a mechanical pump 5, and a second oil supply assembly 6. Among them, the generator 1 includes a first rotor 11 and a first stator 12. The drive motor 2 includes a second rotor 21 and a second stator 22. The electric pump 3 is used to pump oil to the first rotor 11, the second rotor 21, and the second stator 22 through the first oil supply assembly 4. The first oil supply assembly 4 communicates with the first rotor 11 through a first pressure valve 41 and communicates with the second rotor 21 through a second pressure valve 42. The mechanical pump 5 is used to pump oil to the first rotor 11, the second rotor 21, the second stator 22, the first stator 12, and the output end of the first oil supply assembly 4 through the second oil supply assembly 6. The output end of the second oil supply assembly 6 communicates with the output end of the first oil supply assembly 4 in one direction through a third pressure valve 61. The one direction refers to the direction from the output end of the second oil supply assembly 6 to the output end of the first oil supply assembly 4. Specifically, the third pressure valve 61 can limit the flow direction of the oil flowing through the third pressure valve 61 so that the oil can only flow from the second oil supply assembly 6 to the first oil supply assembly 4 and cannot flow in the reverse direction.

[0024] As can be understood, the mechanical pump 5 and the electric pump 3 can lubricate and cool these members by pumping oil to the first rotor 11, the second rotor 21, and the second stator 22. The mechanical pump 5 can lubricate and cool the first stator 12 by pumping oil to the first stator 12 through the second oil supply assembly 6.

[0025] Of these, the oil supplied to the first stator 12 is individually delivered by the electric pump 3 via the second lubrication assembly 6, thereby increasing the independence of lubrication and cooling for the first stator 12 and further improving the rationality of the oil distribution in the hydraulic system of this invention.

[0026] The first lubrication assembly 4 communicates with the first rotor 11 via the first pressure valve 41 and with the second rotor 21 via the second pressure valve 42. By controlling the opening of the first pressure valve 41 and the second pressure valve 42, the amount of oil supplied to the first rotor 11 and the second rotor 21 can be rationally adjusted, avoiding supplying too much oil to the first rotor 11 and the second rotor 21 and reducing oil waste.

[0027] The output terminal of the second lubrication assembly 6 is in unidirectional communication with the output terminal of the first lubrication assembly 4 via the third pressure valve 61, enabling the mechanical pump 5 to deliver oil to the first rotor 11, the second rotor 21, and the second stator 22 via the second lubrication assembly 6, and also helps to improve the lubrication sealing performance of the second lubrication assembly 6, and helps the user to deliver oil to these components driven by the mechanical pump 5 as needed, thereby improving the rationality of oil distribution.

[0028] In related technologies, due to the limitations of interior space, oil pumps typically lubricate multiple components simultaneously through a single port. Because these components operate under different conditions, the port cannot accommodate the lubrication needs of all components, resulting in some components being insufficiently lubricated and prone to failure. Furthermore, maintaining the lubrication of multiple components leads to increased energy consumption of the oil pump, which in turn generates more heat, conversely limiting the oil pump's power supply.

[0029] In the embodiment of the present invention, on the one hand, the lubrication needs of the first rotor 11, the second rotor 21, and the second stator 22 are met and their normal operation is maintained by supplying oil to them via the electric pump 3. On the other hand, considering that the operating time of the generator 1 is short and the operating temperature of the first stator 12 is low, the lubrication and cooling of the first stator 12 is performed individually by the second lubrication assembly 6 using the mechanical pump 5. This distinguishes the lubrication and cooling operations of the first stator 12 from those of the other three, and direct lubrication and cooling are performed for the first stator 12 as needed. In this way, the amount of oil supplied to the first stator 12 is reduced to a basic extent, thereby reducing oil waste.

[0030] Furthermore, in the hydraulic system of the embodiment of the present invention, the output terminals of the first lubrication assembly 4 and the output terminals of the second lubrication assembly are further connected to the first rotor 11 via the first pressure valve 41 and to the second rotor 21 via the second pressure valve 42. This allows, on the one hand, when the hydraulic pressure generated by the operation of the electric pump 3 is relatively small, the amount of oil supplied to the first rotor 11 and the second rotor 21 to be reduced, thereby increasing the amount of oil supplied to the second stator 22 and improving the lubrication and cooling efficiency of the second stator 22. On the other hand, it also helps to provide the first rotor 11 and the second rotor 21 with oil that has sufficient pressure and oil volume, thereby improving the lubrication and cooling effect of the first rotor 11 and the second rotor 21.

[0031] It should be understood that, in the embodiments of the present application, both the first lubrication assembly 4 and the second lubrication assembly 6 include a lubrication line, and the members of the hydraulic system may communicate directly with each other or through the lubrication line.

[0032] As shown in Figures 2 to 4, in the embodiment of the present invention, the hydraulic system has three types of operating states, specifically including the following:

[0033] 1. As shown in Figure 2, the electric pump 3 operates, while the mechanical pump 5 does not. The electric pump 3 supplies oil to the first rotor 11, the second rotor 21, and the second stator 22 via the first lubrication assembly 4. The openings of the first pressure valve 41 and the second pressure valve 42 are controlled according to the actual lubrication and cooling needs of each component. The third pressure valve 61 shuts off the supply of oil driven by the electric pump 3 to the second lubrication assembly 6.

[0034] 2. As shown in Figure 3, both the electric pump 3 and the mechanical pump 5 operate. The electric pump 3 supplies oil to the first rotor 11, the second rotor 21, and the second stator 22 via the first lubrication assembly 4. The mechanical pump 5 supplies oil to the first stator 12 via the second lubrication assembly 6, and at the same time, may supply oil to the first rotor 11, the second rotor 21, and the second stator 22 via the first lubrication assembly 4 by the third pressure valve 61. The openings of the first pressure valve 41, the second pressure valve 42, and the third pressure valve 61 are controlled according to the actual lubrication and cooling needs of each component. For example, when the amount of oil supplied by the electric pump 3 is sufficient to meet the lubrication and cooling needs of the first rotor 11, the second rotor 21, and the second stator 22, the third pressure valve 61 can be closed, that is, the opening of the third pressure valve 61 can be controlled to zero, thereby allowing the mechanical pump 5 to supply oil only to the first stator 12 via the second lubrication assembly 6.

[0035] 3. As shown in Figure 4, the mechanical pump 5 operates, while the electric pump 3 does not. The mechanical pump 5 supplies oil to the first stator 12 via the second oil supply assembly 6, and simultaneously supplies oil to the first rotor 11, the second rotor 21, and the second stator 22 via the first oil supply assembly 4 by the third pressure valve 61.

[0036] In some embodiments of the present application, the first pressure valve 41 may be a one-way valve. This one-way valve can restrict not only the direction of flow of the liquid but also the flow rate of the liquid. Specifically, this one-way valve is a one-way throttle valve.

[0037] In some embodiments of the present application, the second pressure valve 42 may be a one-way valve. This one-way valve can restrict not only the direction of flow of the liquid but also the flow rate of the liquid. Specifically, this one-way valve is a one-way throttle valve.

[0038] In some embodiments of the present application, the third pressure valve 61 may be a one-way valve. This one-way valve can restrict not only the direction of flow of the liquid but also the flow rate of the liquid. Specifically, this one-way valve is a one-way throttle valve.

[0039] In some embodiments of the present invention, as shown in Figure 1, the hydraulic system may further include a shaft tooth 9 and a clutch 7, and the electric pump 3 can further supply oil to the shaft tooth 9 and the clutch 7, respectively, via a first lubrication assembly 4, thereby providing lubrication and cooling to the shaft tooth 9 and the clutch 7.

[0040] In some embodiments of the present invention, the hydraulic system may further include a structure (not shown) for recovering and cooling the oil, which is in communication with an electric pump 3 and a mechanical pump 5, respectively, and can cool the oil after it has completed its lubrication and cooling operations, and can also deliver the cooled oil to the mechanical pump 5 and the electric pump 3, respectively.

[0041] In some embodiments of the present application, as shown in Figure 1, the first lubrication assembly 4 includes a bypass valve 43 and an oil cooler 44, and the output terminal of the first lubrication assembly 4 communicates with the electric pump 3 via the bypass valve 43, and the output terminal of the first lubrication assembly 4 also communicates with the electric pump 3 via the oil cooler 44. Specifically, the bypass valve 43 has two connection ports (not shown) an inlet and an outlet, the electric pump 3 communicates with the inlet of the bypass valve 43, and the output terminal of the first lubrication assembly 4 communicates with the outlet of the bypass valve 43. The oil cooler 44 also has two connection ports (not shown) an inlet and an outlet, the electric pump 3 communicates with the inlet of the oil cooler 44, and the output terminal of the first lubrication assembly 4 communicates with the outlet of the oil cooler 44. For this reason, the bypass valve 43 and the oil cooler 44 are connected in parallel in the hydraulic system.

[0042] To understand this, the bypass valve 43 can maintain the supply of oil to the first rotor 11, the second rotor 21, and the second stator 22, thereby maintaining lubrication and cooling for the three components. The oil cooler 44 can lower the temperature of the oil passing through the bypass valve 43 in order to enhance the cooling effect of the oil on the first rotor 11, the second rotor 21, and the second stator 22. Through the combined action of the bypass valve 43 and the oil cooler 44, the first lubrication assembly 4 can achieve better lubrication and cooling for the first rotor 11, the second rotor 21, and the second stator 22.

[0043] In some embodiments of the present invention, as shown in Figure 1, the first lubrication assembly 4 further includes a first one-way valve 45 and a second one-way valve 46, the first one-way valve 45 connecting the electric pump 3 to a bypass valve 43 and the electric pump 3 to an oil cooler 44, and the second one-way valve 46 connecting the bypass valve 43 to the oil cooler 44.

[0044] Specifically, the first one-way valve 45 has two connection ports (not shown) for an inlet and an outlet. The inlet of the first one-way valve 45 communicates with the electric pump 3, and the outlet of the first one-way valve 45 communicates with the inlet of the bypass valve 43 and the inlet of the oil cooler 44, respectively. The second one-way valve 46 has two connection ports (not shown) for an inlet and an outlet. The inlet of the second one-way valve 46 communicates with the outlet of the bypass valve 43 and the outlet of the oil cooler 44, respectively, and the outlet of the second one-way valve 46 communicates with the output terminal of the first lubrication assembly 4.

[0045] To understand this, the first one-way valve 45 can prevent oil from flowing back into the electric pump 3 when the oil cooler 44 and bypass valve 43 become clogged, thus reducing the impact on the electric pump 3. The second one-way valve 46 can block the oil driven by the second lubrication assembly 6 from flowing back into the bypass valve 43 and oil cooler 44, thus helping to improve the operational independence between the first lubrication assembly 4 and the second lubrication assembly 6.

[0046] In some embodiments of the present invention, as shown in Figure 1, the second lubrication assembly 6 includes a fourth pressure valve 62 and a control valve 63, the fourth pressure valve 62 and the control valve 63 communicating with a mechanical pump 5, the fourth pressure valve 62 being used to supply oil to the first stator 12, and the control valve 63 communicating with the fourth pressure valve 62 to control the opening degree of the fourth pressure valve 62.

[0047] In the hydraulic system provided by the embodiment of the present invention, the mechanical pump 5 can supply oil to the first stator 12 by means of a fourth pressure valve 62, thereby providing lubrication and cooling to the first stator 12. The fourth pressure valve 62 and the control valve 63 are installed in parallel and work together to achieve real-time control of the hydraulic pressure in the second lubrication assembly 6. In one example, the control valve 63 has a control function over the fourth pressure valve 62, and by adjusting the opening degree of the fourth pressure valve 62, the amount of oil in the second lubrication assembly 6 can be adjusted. In another example, the control valve 63 and the fourth pressure valve 62 are independent of each other, and when the opening degree of the control valve 63 itself changes, the amount of oil in the oil passage where it is located changes, which in turn causes a change in the amount of oil in the oil passage where the fourth pressure valve 62 is located, thereby adjusting the amount of oil that the second lubrication assembly 6 supplies to the first stator 12. In this way, the second lubrication assembly 6 helps to adapt the amount of oil supplied to the first stator 12 to the operating conditions of the first stator 12, and in other cases reduces waste and energy consumption due to lubrication and cooling of the first stator 12.

[0048] In some embodiments of the present application, as shown in Figure 1, the hydraulic system includes a clutch 7, and the second lubrication assembly 6 further includes an on-off valve 64, which connects the mechanical pump 5 and the clutch 7. Optionally, the clutch 7 may be the same clutch as the clutch 7 communicating with the first lubrication assembly 4 mentioned above, or it may be a different clutch.

[0049] As can be understood, the clutch 7 is generally used to transmit and interrupt power and generates a large amount of heat during operation. By connecting the mechanical pump 5 and the clutch 7 via the on-off valve 64, the mechanical pump 5 can supply oil with sufficient pressure and flow rate to the clutch 7, thus providing lubrication and cooling to the clutch 7.

[0050] In the embodiment of the present application, the on / off valve 64 may be a two-position, three-way proportional valve.

[0051] In the embodiments of the present invention, the hydraulic system may further include an accumulator (not shown) located between the clutch 7 and the on-off valve 64 and communicating with the on-off valve 64. The accumulator can stabilize hydraulic fluctuations of the clutch 7 and reduce the impact it receives.

[0052] In some embodiments of the present invention, as shown in Figure 1, the hydraulic system includes a clutch 7, and both the first lubrication assembly 4 and the second lubrication assembly 6 are in communication with the clutch 7.

[0053] To make it clear, by communicating with the clutch 7 via the first lubrication assembly 4 and the second lubrication assembly 6, the hydraulic system of the present invention can increase the amount of oil supplied to the clutch 7, thus helping to improve the operating condition of the clutch 7.

[0054] In some embodiments of the present invention, as shown in Figure 1, the hydraulic system includes a relief valve 8, which is located between a third pressure valve 61 and a second lubrication assembly 6, and communicates with the output terminals of the third pressure valve 61 and the second lubrication assembly 6, respectively.

[0055] To make it easier to understand, the relief valve 8 can reduce situations where the hydraulic pressure generated in the second lubrication assembly 6 is too high and pushes open the third pressure valve 61, and helps to divert the excess oil generated in the second lubrication assembly 6 to other locations, thus helping to distribute the oil as needed in the actual situation, while also reducing the impact on the first lubrication assembly 4.

[0056] In some embodiments of the present invention, when the electric pump 3 and the mechanical pump 5 are operated simultaneously, the hydraulic pressure at the output terminal of the first lubrication assembly 4 is always kept lower than the hydraulic pressure at the output terminal of the second lubrication assembly 6. This not only helps to reduce the amount of oil supplied to the first stator 12, but also allows for simultaneous lubrication and cooling of the drive motor 2 and the generator 1 as needed, thereby reducing energy consumption and ensuring that each component can maintain normal operation.

[0057] Furthermore, because the hydraulic pressure at the output terminal of the first lubrication assembly 4 is lower than the hydraulic pressure at the output terminal of the second lubrication assembly 6, the oil liquid with the pressure generated by the mechanical pump 5 is further helped to be supplied by the third pressure valve 61 to the first rotor 11, the second rotor 21, and the second stator 22, further helping to improve the lubrication and cooling effects on the three components.

[0058] In some embodiments of the present invention, by selecting electric pumps 3 and mechanical pumps 5 with different rated flow rates, the effect of making the hydraulic pressure at the output end of the first lubrication assembly 4 lower than the hydraulic pressure at the output end of the second lubrication assembly 6 can be achieved.

[0059] For example, when selecting the electric pump 3 and mechanical pump 9 to be used in the hydraulic system, one can select an electric pump with a relatively small rated flow rate and a mechanical pump with a relatively large rated flow rate. Therefore, when the hydraulic system is in operation and both the electric pump and the mechanical pump are set to their rated operating conditions, the oil flow rate that the electric pump can provide is naturally smaller than the oil flow rate that the mechanical pump can provide, and furthermore, the hydraulic pressure at the output terminal of the first lubrication assembly 4 is naturally smaller than the hydraulic pressure at the output terminal of the second lubrication assembly 6.

[0060] In some other embodiments of the present invention, the effect of making the hydraulic pressure at the output end of the first lubrication assembly 4 less than the hydraulic pressure at the output end of the second lubrication assembly 6 is achieved by further controlling the oil flow rate output by the electric pump and the oil flow rate output by the mechanical pump using a control device.

[0061] Exemplary, as shown in Figure 5, the hydraulic system further includes a controller 10, which is signal-connected to the electric pump 3 and the mechanical pump 5, respectively, thereby controlling the electric pump 3 and the mechanical pump 5. machine The operating status of pump 5 is controlled. Specifically, the controller 10 is configured to control the oil flow rate output by the electric pump 3 and the oil flow rate output by the mechanical pump 5, respectively, so that the oil pressure at the output terminal of the first lubrication assembly 4 is always kept lower than the oil pressure at the output terminal of the second lubrication assembly 6.

[0062] In some embodiments of the present invention, the controller 10 is further signal-connected to the first pressure valve 41 and is configured to control the opening degree of the first pressure valve 41 such that the ratio of the oil flow rate of the second stator 22 to the oil flow rate of the second rotor 21 is 4:1 or greater.

[0063] To make it clear, the second stator 22 and the second rotor 21 are the operating components of the drive motor 2, and both have relatively long operating times. The second stator 22 is lubricated with a relatively large oil flow rate, which helps maintain a relatively stable operating state, while at the same time, the oil flow rate of the second rotor 21 is relatively small, which helps improve the rationality of oil distribution.

[0064] In the embodiment of the present invention, the oil flow rate of the second stator 22 refers to the oil flow rate received by the second stator 22 when the second stator 22 and the second rotor 21 are lubricated simultaneously.

[0065] In the embodiment of the present invention, the oil flow rate of the second rotor 21 refers to the oil flow rate received by the second rotor 21 when the second stator 22 and the second rotor 21 are lubricated simultaneously.

[0066] In some embodiments of the present invention, the controller 10 is further signal-connected to a second pressure valve 42 and is configured to control the opening degree of the second pressure valve 42 such that the ratio of the oil flow rate of the first stator 12 to the oil flow rate of the first rotor 11 is 4:1 or greater.

[0067] To make it easier to understand, the first stator 12 and the first rotor 11 are the operating components of the generator 1, and their operating times are relatively short. The first stator 12 is lubricated with a relatively large oil flow rate, which helps maintain a relatively stable operating state, while at the same time, the oil flow rate of the first rotor 11 is relatively small, which helps improve the rationality of oil distribution.

[0068] In the embodiment of the present invention, the oil flow rate of the first stator 22 refers to the oil flow rate received by the first stator 22 when the first stator 22 and the first rotor 21 are lubricated simultaneously.

[0069] In the embodiment of the present invention, the oil flow rate of the first rotor 21 refers to the oil flow rate received by the first rotor 21 when the first stator 22 and the first rotor 21 are lubricated simultaneously.

[0070] In some embodiments of the present invention, as shown in Figure 5, the controller 10 is further connected to at least one of the following valves to control the opening degree of the corresponding valve: the first pressure valve 41, the second pressure valve 42, the third pressure valve 61, the fourth pressure valve 62, the control valve 63, the on / off valve 64, the bypass valve 43, and the relief valve 8.

[0071] By enabling automated control of the opening degree of each valve using the controller 10, the hydraulic system has high flexibility and relatively precise control capabilities, and can accurately determine and timely meet the oil demand and supply conditions of each component during the operation of the hydraulic system.

[0072] In some other embodiments of the present invention, as shown in Figure 5, the opening degree of at least one of the valves among the first pressure valve 41, second pressure valve 42, third pressure valve 61, fourth pressure valve 62, control valve 63, on-off valve 64, bypass valve 43, and relief valve 8 may be further controlled manually, thereby allowing for flexible adjustment as needed and reducing system costs.

[0073] Continuing to refer to Figure 5, in this embodiment of the present invention, the controller 10 can further control the starting and stopping of the oil cooler 44 and control the cooling temperature of the oil cooler 44 by signal connection to the oil cooler 44, or the oil cooler 44 may be controlled manually. Thus, excessive use of the oil cooler 44 in situations where there is no cooling demand can be avoided, and the energy consumption of the system can be reduced.

[0074] A second aspect of the present application provides an automobile including the hydraulic system described in the above embodiment.

[0075] To facilitate understanding, the automobile of this application employs the hydraulic system of the above embodiment, and therefore has the same technical effects as the above hydraulic system, which will not be explained here.

[0076] In the embodiments of the present invention, the automobile may be a hybrid automobile.

[0077] In some embodiments of the present invention, the automobile includes a clutch 7 and an engine, of which a second lubrication assembly 6 can supply oil to the clutch 7, and the engine is powered by a mechanical pump 5. The automobile has the following five modes, specifically including:

[0078] 1. Pure electric mode. The electric pump 3 operates, while the mechanical pump 5 does not. The electric pump 3 supplies oil to the first rotor 11, the second rotor 21, the second stator 22, and the clutch 7 via the first lubrication assembly 4. The third pressure valve 61 shuts off the supply of oil driven by the electric pump 3 to the second lubrication assembly 6.

[0079] 2. Series mode. The electric pump 3 and the mechanical pump 5 are in operation. The electric pump 3 supplies oil to the first rotor 11, the second rotor 21, the second stator 22, and the clutch 7 via the first oil supply assembly 4. The mechanical pump 5 supplies oil to the first stator 12 via the second oil supply assembly 6 and, via the third pressure valve 61, supplies oil to the first rotor 11, the second rotor 21, the second stator 22, and the clutch 7 via the first oil supply assembly 4.

[0080] 3. Parallel mode. The electric pump 3 and the mechanical pump 5 are in operation. The electric pump 3 supplies oil to the first rotor 11, the second rotor 21, the second stator 22, and the clutch 7 via the first oil supply assembly 4. The mechanical pump 5 supplies oil to the first stator 12 via the second oil supply assembly 6, and then supplies oil to the first rotor 11, the second rotor 21, the second stator 22, and the clutch 7 via the first oil supply assembly 4 by the third pressure valve 61, and further supplies oil to the clutch 7 via the second oil supply assembly 6.

[0081] 4. Direct engine drive mode. The mechanical pump 5 operates, while the electric pump 3 does not. The mechanical pump 5 supplies oil to the first stator 12 via the second oil supply assembly 6. Simultaneously, the third pressure valve 61 supplies oil to the first rotor 11, the second rotor 21, the second stator 22, and the clutch 7 via the first oil supply assembly 4.

[0082] 5. Reverse mode. The electric pump 3 operates, while the mechanical pump 5 does not. The electric pump 3 supplies oil to the first rotor 11, the second rotor 21, the second stator 22, and the clutch 7 via the first lubrication assembly 4. The third pressure valve 61 blocks the flow of oil driven by the electric pump 3 to the second lubrication assembly 6.

[0083] In this application, the terms "first" and "second" are merely for the purpose of describing the objective and should not be understood as indicating or implying relative importance. The term "plural" refers to two or more unless otherwise specified.

[0084] Those skilled in the art will readily conceive of other embodiments of the Application after considering the specification and implementing the Application disclosed herein. The Application is intended to cover any variations, uses, or adaptable changes of the Application, including common or customary technical means known in the Art and not disclosed herein, in accordance with the general principles of the Application. The Specification and Examples are to be considered merely illustrative.

[0085] It should be understood that this application is not limited to the exact structure described above and shown in the drawings, and that various modifications and changes are possible without departing from that scope. The scope of this application is limited only by the attached claims.

[0086] This application claims priority to a Chinese patent application filed on April 24, 2024, with application number 202420869501.2 and utility model title "Hydraulic System and Automobile," the entire contents of which are incorporated into this application by reference. [Explanation of symbols]

[0087] 1. Generator, 11. First rotor, 12. First stator, 2. Drive motor, 21. Second rotor, 22. Second stator, 3. Electric pump, 4. First lubrication assembly, 41. First pressure valve, 42. Second pressure valve, 43. Bypass valve, 44. Oil cooler, 45. First one-way valve, 46. Second one-way valve, 5. Mechanical pump, 6. Second lubrication assembly, 61. Third pressure valve, 62. Fourth pressure valve, 63. Control valve, 64. On / off valve, 7. Clutch, 8. Relief valve, 9. Axis tooth, 10. Controller.

Claims

1. A hydraulic system comprising a generator (1), a drive motor (2), an electric pump (3), a first lubrication assembly (4), a mechanical pump (5), and a second lubrication assembly (6), The generator (1) includes a first rotor (11) and a first stator (12), The drive motor (2) includes a second rotor (21) and a second stator (22), The electric pump (3) is used to supply oil to the first rotor (11), the second rotor (21), and the second stator (22) via the first lubrication assembly (4). The first lubrication assembly (4) communicates with the first rotor (11) via a first pressure valve (41) and with the second rotor (21) via a second pressure valve (42). The mechanical pump (5) is used to supply oil to the first rotor (11), the second rotor (21), the second stator (22), the first stator (12), and the output terminal of the first oil supply assembly (4) via the second oil supply assembly (6). The output terminal of the second lubrication assembly (6) communicates in one direction with the output terminal of the first lubrication assembly (4) via a third pressure valve (61), and the one direction refers to the direction from the output terminal of the second lubrication assembly (6) to the output terminal of the first lubrication assembly (4). Hydraulic system.

2. The first lubrication assembly (4) includes a bypass valve (43) and an oil cooler (44), The bypass valve (43) connects the output terminal of the first lubrication assembly (4) to the electric pump (3), The oil cooler (44) connects the output terminal of the first lubrication assembly (4) to the electric pump (3). The hydraulic system according to claim 1.

3. The first lubrication assembly (4) further includes a first one-way valve (45) and a second one-way valve (46), The first one-way valve (45) connects the electric pump (3) and the bypass valve (43), and also connects the electric pump (3) and the oil cooler (44), The second one-way valve (46) connects the bypass valve (43) and the oil cooler (44). The hydraulic system according to claim 2.

4. The second lubrication assembly (6) includes a fourth pressure valve (62) and a control valve (63), The fourth pressure valve (62) connects the mechanical pump (5) and the first stator (12), and the fourth pressure valve (62) is used to allow or prevent the mechanical pump (5) from supplying oil to the first stator (12). The hydraulic system according to claim 1, wherein the control valve (63) connects the mechanical pump (5) and the fourth pressure valve (62) to control the opening degree of the fourth pressure valve (62).

5. The hydraulic system according to claim 1, wherein the hydraulic system includes a clutch (7), the second lubrication assembly (6) further includes an on-off valve (64), the on-off valve (64) connects the mechanical pump (5) and the clutch (7).

6. The hydraulic system according to claim 1, wherein the hydraulic system includes a clutch (7), and the first lubrication assembly (4) and the second lubrication assembly (6) are both in communication with the clutch (7).

7. The hydraulic system according to claim 1, wherein the hydraulic system includes a relief valve (8), the relief valve (8) is located between the third pressure valve (61) and the second lubrication assembly (6), and communicates with the output terminals of the third pressure valve (61) and the second lubrication assembly (6), respectively.

8. The hydraulic system according to claim 1, wherein when the electric pump (3) and the mechanical pump (5) are operated simultaneously, the hydraulic pressure at the output terminal of the first lubrication assembly (4) is less than the hydraulic pressure at the output terminal of the second lubrication assembly (6).

9. The hydraulic system includes a controller (10), which is signal-connected to the electric pump (3) and the mechanical pump (5), respectively. The controller (10) is configured to control the oil flow rate output by the electric pump (3) and the oil flow rate output by the mechanical pump (5) respectively, such that the oil pressure at the output terminal of the first oil supply assembly (4) is lower than the oil pressure at the output terminal of the second oil supply assembly (6). The hydraulic system according to claim 8.

10. The hydraulic system according to claim 9, wherein the controller (10) is signal-connected to the first pressure valve (41) and is arranged to control the opening degree of the first pressure valve (41) such that the ratio of the oil flow rate of the first stator (12) to the oil flow rate of the first rotor (11) is 4:1 or greater.

11. The hydraulic system according to claim 9, wherein the controller (10) is signal-connected to the second pressure valve (42) and is arranged to control the opening degree of the second pressure valve (42) such that the ratio of the oil flow rate of the second stator (22) to the oil flow rate of the second rotor (21) is 4:1 or greater.

12. An automobile comprising a hydraulic system according to any one of claims 1 to 11.

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