Hydraulic systems and vehicles

Abstract

The present invention discloses a hydraulic system and a vehicle. The hydraulic system includes: a main oil circuit for supplying oil to a clutch system to activate the clutch system and for supplying oil to a parking mechanism; a lubricating and cooling oil circuit for supplying oil to parts to be cooled, and a cooler is provided on the lubricating and cooling oil circuit to cool and lubricate the parts to be cooled; a first control valve is provided on the main oil circuit and is used to control the on-off state of the oil circuit between the main oil circuit and the parking mechanism; a second control valve is provided on the lubricating and cooling oil circuit and is used to control the on-off state of the oil circuit between the lubricating and cooling oil circuit and the parts to be cooled; and a third control valve is provided on the main oil circuit and is connected to the first control valve and the second control valve, and is used to control the operation of at least one of the first control valve and the second control valve. The hydraulic system according to the present invention can realize control of the parking mechanism, meet the different cooling and lubrication requirements of the parts to be cooled, and reduce the structural complexity of the hydraulic system and the space occupied.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and more particularly, to a hydraulic system and a vehicle. Background Art

[0002] In the related art, the hydraulic system has many parts, which makes the structure complex, has high installation requirements, occupies a large space, and is complex to control. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a hydraulic system that can control a parking mechanism, meet the different cooling and lubrication requirements of components to be cooled, and reduce the structural complexity and space occupied by the hydraulic system.

[0004] Another object of the present invention is to provide a vehicle having the above hydraulic system.

[0005] According to an embodiment of the present invention, the hydraulic system includes: an oil tank; a main oil circuit, the main oil circuit is connected to the oil tank, the main oil circuit is used to supply oil to the clutch system to activate the clutch system and to supply oil to the parking mechanism; a lubricating cooling oil circuit, the lubricating cooling oil circuit is connected to the oil tank, the lubricating cooling oil circuit is used to supply oil to the parts to be cooled, and a cooler is provided on the lubricating cooling oil circuit to cool and lubricate the parts to be cooled; a first control valve, the first control valve is arranged on the main oil circuit and is used to control the on-off of the oil circuit between the main oil circuit and the parking mechanism; a second control valve, the second control valve is arranged on the lubricating cooling oil circuit and is used to control the on-off of the oil circuit between the lubricating cooling oil circuit and the parts to be cooled; a third control valve, the third control valve is arranged on the main oil circuit, the third control valve is connected to the first control valve and the second control valve, and the third control valve is used to control the action of at least one of the first control valve and the second control valve.

[0006] According to the hydraulic system of an embodiment of the present invention, a main oil circuit is used to supply oil to the parking mechanism, a first control valve is provided on the main oil circuit and is used to control the on-off of the oil circuit between the main oil circuit and the parking mechanism, thereby realizing control of the parking mechanism; a lubricating cooling oil circuit is used to supply oil to the parts to be cooled, and a cooler is provided on the lubricating cooling oil circuit to cool and lubricate the parts to be cooled, a second control valve is provided on the lubricating cooling oil circuit and is used to control the on-off of the oil circuit between the lubricating cooling oil circuit and the parts to be cooled, thereby meeting different cooling and lubrication requirements of the parts to be cooled, thereby improving the efficiency of the hydraulic system; a third control valve is connected to the first control valve and the second control valve, and the third control valve is used to control at least one action of the first control valve and the second control valve, and different control requirements of the first control valve and the second control valve can be realized only by one third control valve, thereby reducing the structural complexity of the hydraulic system, thereby reducing the number of components, and reducing occupied space.

[0007] In addition, the hydraulic system according to the above embodiment of the present invention may also have the following additional technical features:

[0008] According to the hydraulic system of some embodiments of the present invention, the first control valve and the second control valve are both sliding valves, and the ratio of the initial installation force value of the spring of the first control valve to the valve core diameter is smaller than the ratio of the initial installation force value of the spring to the valve core diameter of the second control valve.

[0009] According to some embodiments of the present invention, the parking mechanism includes: a parking component; a fourth control valve, the fourth control valve is arranged on the main oil circuit, the fourth control valve includes a first valve core, and the first valve core is connected to the parking component to control the movement of the parking component.

[0010] According to some embodiments of the present invention, a groove is provided on a peripheral wall of the first valve core, and the parking mechanism further includes a locking member adapted to extend into the groove to limit axial movement of the first valve core.

[0011] According to some embodiments of the present invention, the hydraulic system also includes: a mechanical pump, which is used to drive the oil in the oil tank into the main oil circuit; an electronic pump, which is connected in parallel with the mechanical pump and is used to drive the oil in the oil tank to flow out; a fifth control valve, the electronic pump is located between the fifth control valve and the oil tank, and the fifth control valve is used to control the connection between the electronic pump and the main oil circuit or the lubrication and cooling oil circuit.

[0012] According to some embodiments of the present invention, the component to be cooled includes at least one of a transmission system, a motor, a brake, and a clutch.

[0013] According to some embodiments of the present invention, the motor is multiple and includes: a first motor and a second motor, the first motor and the second motor are connected to the lubrication and cooling oil circuit, a sixth control valve is provided on the lubrication and cooling oil circuit, and the sixth control valve can selectively control at least one of the first motor and the second motor to be connected to the lubrication and cooling oil circuit.

[0014] According to some embodiments of the present invention, the clutch system includes a plurality of clutches, and the main oil circuit is connected in parallel with a plurality of clutch pressure control circuits for respectively delivering oil to the plurality of clutches.

[0015] According to some embodiments of the present invention, a seventh control valve is provided on each of the plurality of clutch pressure control circuits, and the seventh control valve is used to control the oil flow of the clutch on the corresponding clutch pressure control circuit.

[0016] According to some embodiments of the present invention, when the seventh control valve controls the oil flow of the clutch, the lubrication and cooling oil circuit cools the corresponding clutch.

[0017] According to some embodiments of the present invention, the seventh control valve is a variable force solenoid valve.

[0018] According to some embodiments of the present invention, the main oil circuit includes: a first oil circuit, one end of the first oil circuit is connected to the oil tank, and the other end is connected to the lubrication and cooling oil circuit through an eighth control valve, the eighth control valve is provided with a control end connected to the first oil circuit, and the control end is used to control the movement of the second valve core of the eighth control valve; a second oil circuit, one end of the second oil circuit is connected to the oil tank, and the other end is connected to the clutch system and the parking mechanism, the first control valve and the third control valve are located on the second oil circuit, a branch oil circuit is provided on the second oil circuit, a ninth control valve is provided on the branch oil circuit, and the ninth control valve is used to pressurize the end of the eighth control valve away from the control end to control the movement of the second valve core.

[0019] A vehicle according to an embodiment of the present invention includes a hydraulic system according to an embodiment of the present invention.

[0020] According to the vehicle of the embodiment of the present invention, the main oil circuit is used to supply oil to the parking mechanism, and the first control valve is arranged on the main oil circuit and is used to control the on-off of the oil circuit between the main oil circuit and the parking mechanism to realize the control of the parking mechanism; the lubricating cooling oil circuit is used to supply oil to the parts to be cooled, and a cooler is provided on the lubricating cooling oil circuit to cool and lubricate the parts to be cooled, and the second control valve is arranged on the lubricating cooling oil circuit and is used to control the on-off of the oil circuit between the lubricating cooling oil circuit and the parts to be cooled, so as to meet the different cooling and lubrication requirements of the parts to be cooled, which is beneficial to improving the efficiency of the hydraulic system; the third control valve is connected to the first control valve and the second control valve, and the third control valve is used to control at least one action of the first control valve and the second control valve. Different control requirements of the first control valve and the second control valve can be realized by only one third control valve, which reduces the structural complexity of the hydraulic system, is beneficial to reduce the number of components, and reduces the occupied space.

[0021] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0023] Figure 1 is a structural diagram of a hydraulic system according to an embodiment of the present invention;

[0024] Figure 2 is a schematic diagram of a communication structure of an eighth control valve according to an embodiment of the present invention;

[0025] Figure 3 is a working logic diagram of a vehicle according to an embodiment of the present invention.

[0026] Reference numerals:

[0027] 100. Hydraulic system;

[0028] 10. Fuel tank;

[0029] 20, main oil circuit; 21, first oil circuit; 22, second oil circuit; 221, branch oil circuit;

[0030] 30. Lubrication and cooling oil circuit; 31. Bypass channel;

[0031] 40. Clutch system; 41. Clutch pressure control circuit;

[0032] 50. Parking mechanism; 51. Parking assembly; 52. Locking member;

[0033] 60. Part to be cooled; 61. Cooler; 62. Transmission system; 63. Motor; 64. Brake; 65. Clutch; 631. First motor; 632. Second motor; 651. Clutch A; 652. Clutch B; 653. Clutch C; 654. Clutch D; 655. Clutch E; 656. Clutch K0;

[0034] 71. First control valve; 72. Second control valve; 73. Third control valve; 74. Fourth control valve; 75. Fifth control valve; 76. Sixth control valve; 77. Seventh control valve; 78. Eighth control valve; 79. Ninth control valve; 70. Tenth control valve; 711. Eleventh control valve; 741. First valve core; 742. Groove; 771. A control valve; 772. B control valve; 773. C control valve; 774. D control valve; 775. E control valve; 776. K0 control valve; 781. Control end; 782. First oil port; 783. Second oil port; 784. Third oil port; 785. Fourth oil port; 786. Fifth oil port; 787. Sixth oil port.

[0035] 80. Mechanical pump; 81. Electronic pump; 82. Filter element; 83. Check valve; 84. Safety valve. DETAILED DESCRIPTION

[0036] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0038] In the description of the present invention, "first feature" and "second feature" may include one or more such features, "plurality" means two or more, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features not being in direct contact but being in contact through another feature between them, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and diagonally above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0039] The following describes a hydraulic system 100 according to an embodiment of the present invention with reference to the accompanying drawings.

[0040] Reference Figure 1 As shown, the hydraulic system 100 according to the embodiment of the present invention may include: an oil tank 10 , a main oil circuit 20 , a lubrication and cooling oil circuit 30 , a first control valve 71 and a second control valve 72 .

[0041] Specifically, the main oil circuit 20 is connected to the fuel tank 10 and is used to supply oil to the clutch system 40 to activate it. When oil is supplied to the clutch system 40 through the main oil circuit 20, the clutch system 40 engages, enabling power transmission; when the clutch system 40 is unloaded, the clutch system 40 resets. The main oil circuit 20 also supplies oil to the parking mechanism 50. A first control valve 71 is provided on the main oil circuit 20 and is used to control the oil flow between the main oil circuit 20 and the parking mechanism 50, thereby controlling the parking mechanism 50 and meeting parking and release control requirements.

[0042] At the same time, if Figure 1 As shown, the lubricating cooling oil circuit 30 is connected to the oil tank 10, and the lubricating cooling oil circuit 30 is used to supply oil to the part to be cooled 60, and a cooler 61 is provided on the lubricating cooling oil circuit 30. After the oil flows through the cooler 61 and flows to the part to be cooled 60, the part to be cooled 60 can be cooled and lubricated, meeting the cooling and lubrication needs of the part to be cooled 60. The second control valve 72 is provided on the lubricating cooling oil circuit 30, and the second control valve 72 is used to control the on-off of the oil circuit between the lubricating cooling oil circuit 30 and the part to be cooled 60, meeting the different cooling and lubrication needs of the part to be cooled 60, which is beneficial to improving the efficiency of the hydraulic system 100 and improving fuel economy. Among them, as Figure 1 As shown, the component to be cooled 60 may include at least one of a transmission system 62 , a motor 63 , a brake 64 and a clutch 65 , all of which may be supplied with oil through the lubrication cooling oil circuit 30 for cooling and lubrication.

[0043] In addition, if Figure 1As shown, hydraulic system 100 also includes a third control valve 73, which is disposed on main oil circuit 20 and connected to first control valve 71 and second control valve 72. Third control valve 73 is used to control the operation of at least one of first control valve 71 and second control valve 72. In other words, third control valve 73 can control the operation of first control valve 71 and second control valve 72, or third control valve 73 can control the operation of either. Thus, different control requirements for first control valve 71 and second control valve 72 can be met using only one third control valve 73, reducing the structural complexity of hydraulic system 100, facilitating a reduction in the number of components, reducing occupied space, minimizing installation space, and lowering production costs. For example, third control valve 73 can be a linear proportional solenoid valve.

[0044] According to the hydraulic system 100 of the present invention, the main oil circuit 20 is used to supply oil to the parking mechanism 50, and the first control valve 71 is provided on the main oil circuit 20 and is used to control the on-off of the oil circuit between the main oil circuit 20 and the parking mechanism 50, thereby realizing control of the parking mechanism 50; the lubricating cooling oil circuit 30 is used to supply oil to the part to be cooled 60, and the lubricating cooling oil circuit 30 is provided with a cooler 61 for cooling and lubricating the part to be cooled 60, and the second control valve 72 is provided on the lubricating cooling oil circuit 30 and is used to control the on-off of the oil circuit between the lubricating cooling oil circuit 30 and the part to be cooled 60, thereby meeting the different cooling and lubrication requirements of the part to be cooled 60, thereby improving the efficiency of the hydraulic system 100; the third control valve 73 is connected to the first control valve 71 and the second control valve 72, and the third control valve 73 is used to control at least one action of the first control valve 71 and the second control valve 72. Different control requirements of the first control valve 71 and the second control valve 72 can be realized by only one third control valve 73, thereby reducing the structural complexity of the hydraulic system 100, thereby reducing the number of components and reducing occupied space.

[0045] In some embodiments of the present invention, Figure 1 As shown, the first control valve 71 and the second control valve 72 are both slide valves, which have a simple and compact structure, are easy to install, and operate reliably.

[0046] In addition, the ratio of the initial installation force value of the spring of the first control valve 71 to the valve core diameter is smaller than the ratio of the initial installation force value of the spring of the second control valve 72 to the valve core diameter, which enables the first control valve 71 and the second control valve 72 to meet different control requirements, and facilitates the control of the first control valve 71 and the second control valve 72 by the pressure of the oil flowing through the third control valve 73. When the oil is low-pressure oil, the parking mechanism 50 is controlled. When the oil is high-pressure oil, the cooling and lubrication requirements of the part to be cooled 60 are met. The first control valve 71 and the second control valve 72 can be adjusted according to different control requirements, and the control is simple.

[0047] In some specific embodiments, Figure 1 As shown, the part to be cooled 60 can be a brake 64, the first control valve 71 can control the on-off of the oil circuit between the main oil circuit 20 and the parking mechanism 50, and the second control valve 72 can control the on-off of the oil circuit between the lubricating cooling oil circuit 30 and the brake 64, and the ratio of the initial installation force value of the spring of the first control valve 71 to the valve core diameter is smaller than the ratio of the initial installation force value of the spring of the second control valve 72 to the valve core diameter. When the oil flowing through the third control valve 73 is low-pressure oil, the low-pressure oil can push the valve core of the first control valve 71 to move, so that the oil circuit between the main oil circuit 20 and the parking mechanism 50 is connected, thereby realizing control of the parking mechanism 50; when the oil flowing through the third control valve 73 is high-pressure oil, the high-pressure oil can push the valve core of the first control valve 71 to move, and the high-pressure oil can push the valve core of the second control valve 72 to move, while realizing control of the parking mechanism 50, making the oil circuit between the lubrication cooling oil circuit 30 and the brake 64 connected, cooling and lubricating the brake 64, and meeting the sliding friction working requirements of the brake 64.

[0048] According to some embodiments of the present invention, Figure 1 As shown, the parking mechanism 50 includes a parking assembly 51 and a fourth control valve 74. The fourth control valve 74 is disposed on the main oil circuit 20 and includes a first valve core 741 connected to the parking assembly 51. When oil flows through the first control valve 71 and into the fourth control valve 74, the oil pushes the first valve core 741 to move axially, causing the first valve core 741 to drive the parking assembly 51 to move. This allows parking and releasing the vehicle, fulfilling the requirements of hydraulic parking and ensuring reliable control.

[0049] In some embodiments of the present invention, Figure 1 As shown, a groove 742 is provided on the peripheral wall of the first valve core 741, and the parking mechanism 50 also includes a locking member 52, which can extend into the groove 742, so that the locking member 52 can limit the axial movement of the first valve core 741, thereby limiting the movement of the parking assembly 51, and can meet the needs of mechanical parking. Through the joint action of the fourth control valve 74 and the locking member 52, dual mechanical and hydraulic protection of parking can be achieved, which is conducive to ensuring the safety of parking and improving the user experience.

[0050] According to some embodiments of the present invention, Figure 1As shown, the hydraulic system 100 also includes a mechanical pump 80, an electronic pump 81 and a fifth control valve 75. The mechanical pump 80 is used to drive the oil in the oil tank 10 into the main oil circuit 20 to meet the oil supply demand for the main oil circuit 20. The electronic pump 81 is connected in parallel with the mechanical pump 80. The electronic pump 81 is located between the fifth control valve 75 and the oil tank 10, and is used to drive the oil in the oil tank 10 to flow out. The fifth control valve 75 is used to control the electronic pump 81 to be connected with the main oil circuit 20 or the lubricating and cooling oil circuit 30, which can meet the different oil supply requirements of the main oil circuit 20 and the lubricating and cooling oil circuit 30, ensuring that the hydraulic system 100 is more efficient.

[0051] When the fifth control valve 75 controls the electronic pump 81 to be connected to the main oil circuit 20, the electronic pump 81 can realize the initial pressure supply to the main oil circuit 20, which is convenient for driving the vehicle to start and ensuring the control reliability, and can realize the parallel supply of the mechanical pump 80 and the electronic pump 81. When the oil demand of the hydraulic system 100 is determined, the displacement of the mechanical pump 80 can be reduced, which is beneficial to improving the working efficiency of the mechanical pump 80 and the fuel economy of the vehicle; when the fifth control valve 75 controls the electronic pump 81 to be connected to the lubricating and cooling oil circuit 30, the independent supply of the mechanical pump 80 and the electronic pump 81 can be realized, and the electronic pump 81 can drive the oil in the oil tank 10 to enter the lubricating and cooling oil circuit 30 to realize the oil supply demand for the lubricating and cooling oil circuit 30, and the mechanical pump 80 can drive the oil in the oil tank 10 to enter the main oil circuit 20 to realize the oil supply demand for the main oil circuit 20.

[0052] For example, when the vehicle starts, the electronic pump 81 supplies oil to the main oil circuit 20 to meet the vehicle's pure electric starting conditions and the pressure supply requirements of the hydraulic system 100, such as the oil supply requirements for the clutch system 40; when the vehicle is driving, the fifth control valve 75 controls the electronic pump 81 to supply oil to the cooling and lubricating oil circuit to meet the cooling and lubrication supply requirements of the cooling component 60.

[0053] In some embodiments, as Figure 1 As shown, the hydraulic system 100 may include a filter 82, which can be configured according to actual usage requirements. The filter 82 can filter the oil in the oil tank 10 to ensure the cleanliness of the hydraulic system 100, avoid problems such as clogging, and help extend the service life of the hydraulic system 100. For example, the filter 82 can be installed at the input end of the electronic pump 81, the input end of the mechanical pump 80, or the input end of the cooler 61.

[0054] In some embodiments, as Figure 1As shown, the hydraulic system 100 may include a one-way valve 83. The one-way valve 83 may be configured according to actual use requirements. The one-way valve 83 may prevent problems such as oil backflow in the hydraulic system 100 and ensure the normal operation of the hydraulic system 100. For example, the one-way valve 83 may be provided at the output end of the electronic pump 81, the output end of the mechanical pump 80, or the oil output end of different control valves.

[0055] In some embodiments of the present invention, Figure 1 As shown, there are multiple motors 63, and the multiple motors 63 include a first motor 631 and a second motor 632. The first motor 631 and the second motor 632 are connected to the lubrication cooling oil circuit 30. The lubrication cooling oil circuit 30 can supply oil to the first motor 631 and the second motor 632 to meet the cooling and lubrication needs of the first motor 631 and the second motor 632.

[0056] In addition, if Figure 1 As shown, a sixth control valve 76 is further provided on the lubricating cooling oil circuit 30. The sixth control valve 76 can selectively control at least one of the first motor 631 and the second motor 632 to be connected to the lubricating cooling oil circuit 30, that is, the sixth control valve 76 can control both the first motor 631 and the second motor 632 to be connected to the lubricating cooling oil circuit 30, or the sixth control valve 76 can control one of them to be connected to the lubricating cooling oil circuit 30, which can realize different cooling and lubrication requirements for the first motor 631 and the second motor 632, reduce the flow demand of the hydraulic system 100, improve the cooling efficiency and working efficiency of the hydraulic system 100, and reduce the power of the electronic pump 81.

[0057] In some embodiments, the sixth control valve 76 can control the cooling flow to the first motor 631 and the second motor 632. The first motor 631 and the second motor 632 can respectively distribute the cooling flow according to the heat dissipation requirements of the first motor 631 and the second motor 632 to meet different cooling requirements, reduce the flow requirements of the hydraulic system 100, and improve the cooling efficiency of the hydraulic system 100.

[0058] According to some embodiments of the present invention, Figure 1 As shown, the clutch system 40 may include multiple clutches 65, and multiple clutch pressure control circuits 41 are provided on the main oil circuit 20. The multiple clutch pressure control circuits 41 are arranged in parallel. The multiple clutch pressure control circuits 41 can respectively deliver oil to the multiple clutches 65 to realize the control of the multiple clutches 65, meet the engagement and reset of the multiple clutches 65, realize the adjustment requirements of multiple gears of the vehicle, realize multiple working modes of the hydraulic system 100, and make the hydraulic system 100 compact and reasonable in structure, which is conducive to reducing the installation space.

[0059] In the embodiment of the present invention, the number of the clutches 65 can be flexibly set according to actual conditions. For example, the clutches 65 can be as follows: Figure 1 Six are shown, but there may also be two, three, four, five, seven or more, all of which are within the scope of protection of the present invention.

[0060] In some embodiments of the present invention, Figure 1 As shown, a seventh control valve 77 is provided on each of the multiple clutch pressure control circuits 41. The seventh control valve 77 is used to control the oil on and off of the clutch 65 on the corresponding clutch pressure control circuit 41, so as to facilitate the control of the corresponding clutch 65 and meet the requirements of the clutch 65 engagement and reset, making the control simple.

[0061] In some specific embodiments, Figure 1 As shown, the plurality of clutches 65 may include an A clutch 651 , a B clutch 652 , a C clutch 653 , a D clutch 654 , an E clutch 655 and a K0 clutch 656 .

[0062] The seventh control valve 77 on the clutch pressure control circuit 41 provided with the A clutch 651 is the A control valve 771, and the A clutch 651 can be controlled by the A control valve 771; the seventh control valve 77 on the clutch pressure control circuit 41 provided with the B clutch 652 is the B control valve 772, and the B clutch 652 can be controlled by the B control valve 772; the seventh control valve 77 on the clutch pressure control circuit 41 provided with the C clutch 653 is the C control valve 773, and the C clutch 653 can be controlled by the C control valve 773; The seventh control valve 77 on the clutch pressure control circuit 41 of the D clutch 654 is the D control valve 774, and the D clutch 654 can be controlled by the D control valve 774; the seventh control valve 77 on the clutch pressure control circuit 41 with the E clutch 655 is the E control valve 775, and the E clutch 655 can be controlled by the E control valve 775; the seventh control valve 77 on the clutch pressure control circuit 41 with the K0 clutch 656 is the K0 control valve 776, and the K0 clutch 656 can be controlled by the K0 control valve 776.

[0063] Thus, by controlling the A control valve 771, the B control valve 772, the C control valve 773, the D control valve 774, the E control valve 775 and the K0 control valve 776, the vehicle can realize eight forward gears and one reverse gear, meeting the different control requirements of the vehicle. For example, the specific control of the first control valve 71, the second control valve 72, the seventh control valve 77 and the clutch 65 is as follows: Figure 3 As shown, “●” indicates working, “○” indicates optional working, and a space indicates not working.

[0064] In some embodiments, as Figure 1 As shown, the A control valve 771, the B control valve 772 and the K0 control valve 776 are normal low-pressure solenoid valves. When the A control valve 771, the B control valve 772 and the K0 control valve 776 are in the energized state, the A control valve 771, the B control valve 772 and the K0 control valve 776 control the clutch pressure control circuit 41 to be connected, and can supply oil to the A clutch 651, the B clutch 652 and the K0 clutch 656, so as to realize the combination of the clutch system 40 and perform power transmission; when the A control valve 771, the B control valve 772 and the K0 control valve 776 are in the de-energized state, the A control valve 771, the B control valve 772 and the K0 control valve 776 control the clutch pressure control circuit 41 to be disconnected, so as to unload the A clutch 651, the B clutch 652 and the K0 clutch 656, so as to realize the reset of the clutch system 40 and meet different usage requirements.

[0065] The C control valve 773, the D control valve 774 and the E control valve 775 are normal high-pressure solenoid valves. When the C control valve 773, the D control valve 774 and the E control valve 775 are in the energized state, the C control valve 773, the D control valve 774 and the E control valve 775 control the clutch pressure control circuit 41 to be disconnected, and can unload the C control valve 773, the D control valve 774 and the E control valve 775 to achieve the resetting of the clutch system 40; when the C control valve 773, the D control valve 774 and the E control valve 775 are in the de-energized state, the C control valve 773, the D control valve 774 and the E control valve 775 control the clutch pressure control circuit 41 to be connected, and can supply oil to the C control valve 773, the D control valve 774 and the E control valve 775 to achieve the engagement of the clutch system 40, ensure that the hydraulic system 100 has gear engagement, and performs power transmission to meet the required requirements. At the same time, the C control valve 773, the D control valve 774 and the E control valve 775 are normal high-pressure solenoid valves, which can realize the limp home position of the vehicle (for example Figure 3 The D6 gear shown in the figure) can make the vehicle have better ride comfort, smoother gear shifting, and high control reliability, which is conducive to improving the user's riding experience.

[0066] According to some embodiments of the present invention, Figure 1 As shown, when the seventh control valve 77 controls the oil flow of the clutch 65, the lubricating cooling oil circuit 30 cools the corresponding clutch 65, which can cool the working clutch 65, improve the working efficiency of the hydraulic system 100, enhance fuel economy, and help extend the service life of the clutch 65.

[0067] In some specific embodiments, Figure 1As shown, the seventh control valve 77 can be a K0 control valve 776, and the clutch 65 can be a K0 clutch 656. An eleventh control valve 711 is provided on the lubricating and cooling oil circuit 30. The eleventh control valve 711 is used to control the on-off of the oil circuit between the lubricating and cooling oil circuit 30 and the K0 clutch 656. The eleventh control valve 711 is connected to the output end of the K0 control valve 776, so that a part of the oil flowing through the K0 control valve 776 can enter the K0 clutch 656 to control the operation of the K0 clutch 656, and another part of the oil flowing through the K0 control valve 776 can push the eleventh control valve 711 to operate, so that the K0 clutch 656 is connected to the lubricating and cooling oil circuit 30, thereby cooling the K0 clutch 656, meeting the cooling requirements of the K0 clutch 656, and extending the service life of the K0 clutch 656.

[0068] In some embodiments, as Figure 1 As shown, a bypass channel 31 is provided on the lubricating cooling oil circuit 30, and a tenth control valve 70 is provided on the bypass channel 31. The tenth control valve 70 is used to control the on-off of the oil circuit between the bypass channel 31 and the eleventh control valve 711 to meet the different cooling flow requirements of the K0 clutch 656.

[0069] In some embodiments of the present invention, the seventh control valve 77 can be a variable force solenoid valve, which can realize the on-off of oil between the clutch pressure control circuit 41 and the corresponding clutch 65. Compared with the related art of controlling the clutch 65 through multiple control valves, the present invention only sets one control valve to realize the control of the corresponding clutch 65, which can reduce the oil leakage of the hydraulic system 100, which is beneficial to reduce the number of components, reduce the occupied space, and make the installation space small.

[0070] According to some embodiments of the present invention, Figure 1 As shown, the main oil circuit 20 includes a first oil circuit 21 and a second oil circuit 22. One end of the first oil circuit 21 is connected to the oil tank 10, and the other end of the first oil circuit 21 is connected to the lubricating and cooling oil circuit 30 via an eighth control valve 78. The eighth control valve 78 can control the flow of oil between the first oil circuit 21 and the lubricating and cooling oil circuit 30 to meet different control requirements. One end of the second oil circuit 22 is connected to the oil tank 10, and the other end of the second oil circuit 22 is connected to the clutch system 40 and the parking mechanism 50. The second oil circuit 22 can meet the oil supply requirements of the clutch system 40 and the parking mechanism 50. The first control valve 71 and the third control valve 73 are located on the second oil circuit 22. The first control valve 71 and the third control valve 73 can be used to meet different control requirements of the second oil circuit 22.

[0071] In addition, if Figure 1As shown, the eighth control valve 78 has a control end 781 that communicates with the first oil circuit 21 and is used to control the movement of the second valve core of the eighth control valve 78. The second oil circuit 22 is provided with a branch oil circuit 221, which is provided with a ninth control valve 79. The ninth control valve 79 is used to apply pressure to the end of the eighth control valve 78 away from the control end 781, so that the ninth control valve 79 can control the movement of the second valve core. As a result, the second valve core is in a balanced state under the combined action of the control end 781 and the ninth control valve 79, thereby achieving control of the oil pressure of the hydraulic system 100, meeting the requirements of oil pressure regulation, and simplifying control. For example, the ninth control valve 79 can be a pilot proportional solenoid valve.

[0072] In some embodiments, as Figure 2 As shown, the eighth control valve 78 includes a first oil port 782, a second oil port 783, a third oil port 784, a fourth oil port 785, a fifth oil port 786 and a sixth oil port 787. The first oil port 782, the second oil port 783 and the third oil port 784 are all connected to the oil tank 10. The first oil port 782 is the output inlet of the oil after pressure regulation of the hydraulic system 100, the second oil port 783 is the oil inlet of the cooling and lubricating oil circuit of the eighth control valve 78, the third oil port 784 is the oil inlet of the control end 781, the fourth oil port 785 is the oil outlet of the cooling and lubricating oil circuit of the eighth control valve 78, the fifth oil port 786 is connected to the oil tank 10, and the sixth oil port 787 is connected to the branch oil circuit 221 for linear control of the hydraulic system 100.

[0073] Therefore, when the first oil port 782, the second oil port 783, the fourth oil port 785 and the fifth oil port 786 are all not conductive, the third oil port 784 is connected to the first oil circuit 21, and the sixth oil port 787 is connected to the branch oil circuit 221, so that the first oil circuit 21 and the branch oil circuit 221 respectively pressurize the second valve core to realize the control of the oil pressure of the hydraulic system 100 and meet the demand of oil pressure regulation; the second oil port 783 is connected to the fourth oil port 785, while ensuring the oil pressure of the hydraulic system 100, the second oil circuit 22 can supply oil to the cooling and lubricating oil circuit, meet the demand for oil in the cooling and lubricating oil circuit, and improve the cooling and lubrication efficiency; the second oil port 783 is connected to the fourth oil port 785, and the first oil port 782 is connected to the fifth oil port 786, while ensuring the oil pressure of the hydraulic system 100, the demand for oil in the cooling and lubricating oil circuit is met, and the excess oil on the main oil circuit 20 can be discharged to meet different oil volume requirements.

[0074] In some embodiments, as Figure 1As shown, the hydraulic system 100 includes a safety valve 84, and the first oil port 782, the second oil port 783 and the third oil port 784 are all connected to the safety valve 84, and the safety valve 84 is connected to the oil tank 10. When a problem occurs inside the hydraulic system 100, the pressure is released in time through the safety valve 84 to ensure the working safety of the hydraulic system 100.

[0075] In some embodiments, as Figure 1 As shown, the hydraulic system 100 includes an accumulator, which can be disposed between the control valves and the oil tank 10. The accumulator can ensure pressure stability in the main oil circuit 20. For example, the accumulator can be disposed between the eighth control valve 78 and the oil tank 10, between the seventh control valve 77 and the oil tank 10, between the third control valve 73 and the oil tank 10, etc., to meet different usage requirements.

[0076] The vehicle according to the embodiment of the present invention includes the hydraulic system 100 according to the embodiment of the present invention. Since the hydraulic system 100 according to the embodiment of the present invention has the above-mentioned beneficial technical effects, the vehicle according to the embodiment of the present invention uses the main oil circuit 20 to supply oil to the parking mechanism 50, and the first control valve 71 is provided on the main oil circuit 20 and is used to control the on-off of the oil circuit between the main oil circuit 20 and the parking mechanism 50, thereby controlling the parking mechanism 50; the lubricating cooling oil circuit 30 is used to supply oil to the part to be cooled 60, and the lubricating cooling oil circuit 30 is provided with a cooler 61 to cool and lubricate the part to be cooled 60, and the second control valve 72 is provided on the lubricating cooling oil circuit 30 and is used to control the lubricating cooling oil circuit 30. The opening and closing of the oil circuit between the cooling oil circuit 30 and the part to be cooled 60 meets the different cooling and lubrication requirements of the part to be cooled 60, which is beneficial to improving the efficiency of the hydraulic system 100; the third control valve 73 is connected to the first control valve 71 and the second control valve 72, and the third control valve 73 is used to control at least one action of the first control valve 71 and the second control valve 72. Different control requirements for the first control valve 71 and the second control valve 72 can be achieved by only one third control valve 73, which reduces the structural complexity of the hydraulic system 100, helps to reduce the number of components, and reduces occupied space.

[0077] In some embodiments, the vehicle may be a new energy vehicle, which features low energy consumption and environmental friendliness. New energy vehicles equipped with hybrid transmissions offer the advantage of long driving range, alleviating range anxiety. For example, a hybrid transmission may be a combination of an engine and multiple motors, offering various modes such as electric drive, series, and parallel operation.

[0078] In some embodiments where the plurality of motors 63 include a first motor 631 and a second motor 632, a dual-motor series-parallel hybrid transmission can achieve single-stage or multi-stage reduction. The two motors in the dual-motor series-parallel hybrid transmission are the first motor 631 and the second motor 632. The multi-stage reduction of the dual-motor series-parallel hybrid transmission has multiple gear ratios, which can more reasonably distribute the intervals and gradients of the gear ratios. The operation of the first motor 631 and the second motor 632 can better utilize the vehicle's fuel economy, improve the vehicle's power performance, and meet the driver's driving power requirements. At the same time, the hydraulic system 100 of the present invention can meet different cooling and lubrication requirements for the first motor 631 and the second motor 632, reduce the flow demand of the hydraulic system 100, improve the cooling efficiency and working efficiency of the hydraulic system 100, and reduce the power of the electronic pump 81.

[0079] The hydraulic system 100 and other components and operations of the vehicle according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0080] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0081] Throughout this specification, reference to terms such as "embodiment," "specific embodiment," and "example" indicates that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0082] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A hydraulic system, characterized in that: include: tank; a main oil circuit, the main oil circuit being in communication with the oil tank and being used to supply oil to the clutch system to actuate the clutch system and to supply oil to the parking mechanism; a lubricating cooling oil circuit, the lubricating cooling oil circuit being in communication with the oil tank and being used to supply oil to the parts to be cooled, and a cooler being provided on the lubricating cooling oil circuit for cooling and lubricating the parts to be cooled; a first control valve, the first control valve being provided on the main oil circuit and being used for controlling the opening and closing of the oil circuit between the main oil circuit and the parking mechanism; a second control valve, the second control valve being provided in the lubricating and cooling oil circuit and being used for controlling the opening and closing of the oil circuit between the lubricating and cooling oil circuit and the component to be cooled; A third control valve is provided on the main oil line, the third control valve is connected to the first control valve and the second control valve, and is used to control at least one of the first control valve and the second control valve. The first control valve and the second control valve are both sliding valves, and the ratio of the initial installation force of the spring to the valve core diameter of the first control valve is smaller than the ratio of the initial installation force of the spring to the valve core diameter of the second control valve.

2. The hydraulic system according to claim 1, characterized in that The parking mechanism comprises: parking components; A fourth control valve is provided on the main oil circuit. The fourth control valve includes a first valve core. The first valve core is connected to the parking assembly to control the movement of the parking assembly.

3. The hydraulic system according to claim 2, characterized in that A groove is provided on the peripheral wall of the first valve core, and the parking mechanism further includes a locking member, which is suitable for extending into the groove to limit the axial movement of the first valve core.

4. The hydraulic system according to claim 1, characterized in that Also includes: a mechanical pump, the mechanical pump being used to drive the oil in the oil tank into the main oil circuit; an electronic pump, connected in parallel with the mechanical pump and used to drive the oil in the oil tank to flow out; A fifth control valve, wherein the electronic pump is located between the fifth control valve and the oil tank, and the fifth control valve is used to control the communication between the electronic pump and the main oil circuit or the lubrication and cooling oil circuit.

5. The hydraulic system according to claim 1, characterized in that The component to be cooled includes at least one of a transmission system, a motor, a brake, and a clutch.

6. The hydraulic system according to claim 5, characterized in that The motors are multiple and include: A first motor and a second motor are connected to the lubricating and cooling oil circuit. A sixth control valve is provided on the lubricating and cooling oil circuit. The sixth control valve can selectively control at least one of the first motor and the second motor to be connected to the lubricating and cooling oil circuit.

7. The hydraulic system according to claim 1, characterized in that The clutch system includes a plurality of clutches, and the main oil circuit is connected in parallel with a plurality of clutch pressure control circuits for respectively delivering oil to the plurality of clutches.

8. The hydraulic system according to claim 7, characterized in that: A seventh control valve is provided on each of the plurality of clutch pressure control circuits, and the seventh control valve is used to control the oil flow of the clutch on the corresponding clutch pressure control circuit.

9. The hydraulic system according to claim 8, characterized in that When the seventh control valve controls the oil flow of the clutch, the lubrication and cooling oil circuit cools the corresponding clutch.

10. The hydraulic system according to claim 8, characterized in that The seventh control valve is a variable force solenoid valve.

11. The hydraulic system according to claim 1, wherein: The main oil circuit includes: a first oil circuit, one end of the first oil circuit being in communication with the oil tank, and the other end of the first oil circuit being in communication with the lubrication and cooling oil circuit via an eighth control valve, the eighth control valve being provided with a control end in communication with the first oil circuit, the control end being configured to control movement of a second valve core of the eighth control valve; A second oil circuit, one end of the second oil circuit is connected to the oil tank, and the other end is connected to the clutch system and the parking mechanism, the first control valve and the third control valve are located on the second oil circuit, a branch oil circuit is provided on the second oil circuit, a ninth control valve is provided on the branch oil circuit, and the ninth control valve is used to apply pressure to the end of the eighth control valve away from the control end to control the movement of the second valve core.

12. A vehicle, characterized in that: Comprising a hydraulic system according to any one of claims 1-11.

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