An integrated hydraulic control system and control device for a hybrid transmission

Abstract

This invention discloses an integrated hydraulic control system and control device for a hybrid transmission, comprising: an electronic pump, a mechanical pump, an oil filter, a switching valve, an accumulator, a pilot valve, a valve core, and an oil cooler. The electronic pump and the mechanical pump are connected to the oil tank through the oil filter. The outlet of the mechanical pump is connected in series with a first check valve and a second check valve, and then connected to a multi-plate clutch through the switching valve. The accumulator is connected to the oil passage between the switching valve and the multi-plate clutch. The inlets of the pilot valve and the valve core are connected to the oil passage between the first check valve and the second check valve, and the outlet of the valve core is connected to the oil passage between the third check valve and the oil cooler. This invention, through the combination of the mechanical pump and the electronic pump, can adjust the mode of the hybrid transmission to meet the diverse needs of the vehicle's ICE direct drive, parallel drive, series drive, and pure electric drive. By setting a valve body and controlling the oil pressure of the valve body through the pilot valve to control the connection of the oil circuit, the pressure value of the hydraulic system is kept constant.

Description

Technical Field

[0001] This invention relates to the field of hydraulic control technology, and specifically to an integrated hydraulic control system and control device for a hybrid transmission. Background Technology

[0002] Hybrid transmission hydraulic control systems play a crucial role in modern vehicles. These systems offer vehicles multiple driving modes, such as pure electric mode, series mode, parallel mode, and ICE mode, ensuring optimal performance and efficiency under various driving conditions. Therefore, the distribution of vehicle power and the interruption of ICE power become particularly critical.

[0003] However, the current technology of directly controlling clutch engagement and disengagement via an electronic hydraulic pump presents a series of problems. First, this method may cause jerking during engagement, affecting driver comfort. Second, excessive hydraulic pulsation may occur when the electronic pump starts, which can not only affect system stability but also potentially damage other hydraulic components.

[0004] To address these issues, some solutions employ split-type hydraulic modules for control. While this approach can improve the problems to some extent, it introduces new challenges, such as increased structural complexity, increased system weight, and higher costs. Summary of the Invention

[0005] The technical problem to be solved by this invention is the problem of jerking and other issues affecting system stability when the electronic pump controls the clutch. The purpose is to provide an integrated hydraulic control system and control device for hybrid transmissions, aiming to overcome the shortcomings of the prior art and provide a more optimized, efficient and low-cost hydraulic control method.

[0006] This invention is achieved through the following technical solution:

[0007] An integrated hydraulic control system for a hybrid transmission includes: an electronic pump, a mechanical pump, an oil filter, a switching valve, an accumulator, a pilot valve, a valve core, and an oil cooler;

[0008] The oil inlet of the electronic pump and the oil inlet of the mechanical pump are both connected to the oil tank through the oil filter. The oil outlet of the mechanical pump is connected to the multi-plate clutch through the switching valve after being connected in series with the first check valve and the second check valve. The accumulator is connected to the oil passage between the switching valve and the multi-plate clutch.

[0009] The oil outlet of the electronic pump is connected to the third check valve and then to the component to be lubricated via the oil cooler.

[0010] The inlet of the pilot valve and the valve core are connected to the oil passage between the first check valve and the second check valve, and the outlet of the valve core is connected to the oil passage between the third check valve and the oil cooler. The pilot valve is used to control the opening of the valve core according to the pressure.

[0011] Furthermore, it also includes a pressure sensor and a safety check valve. The pressure sensor is used to detect the oil pressure in the oil passage between the first check valve and the second check valve. The oil inlet of the safety check valve is connected to the oil passage between the first check valve and the second check valve, and the oil outlet of the safety check valve is connected to the oil tank.

[0012] An integrated hydraulic control device for a hybrid transmission includes: a support plate, an intermediate partition plate, and an upper valve plate for fixing a multi-plate clutch. A first side of the intermediate partition plate is sealed and fitted with the support plate, and a second side of the intermediate partition plate is sealed and fitted with the upper valve plate. An oil filter and a mechanical pump are fixedly connected to the upper valve plate, and the pumping chamber of the mechanical pump is disposed inside the upper valve plate.

[0013] Multiple support-side oil passages are provided on the sealing surface of the support plate and the intermediate partition plate, and multiple valve-side oil passages are provided on the sealing surface of the upper valve plate and the intermediate partition plate.

[0014] The support plate is also provided with an oil hole 5A that connects to the clutch oil passage, and the upper valve plate is also provided with a valve plate side oil hole that connects to the switching valve, oil filter, pilot valve, valve core, and electric pump; the intermediate partition plate is provided with an intermediate oil hole that connects the support side oil passage and the valve plate side oil passage.

[0015] Specifically, the support-side oil passage is obtained by assembling a groove and a middle partition plate on the side of the support plate; the valve plate-side oil passage is obtained by assembling a groove and a middle partition plate on the side of the upper valve plate.

[0016] Specifically, the device includes a main oil circuit, a first oil circuit, and a second oil circuit;

[0017] The main oil circuit includes: an oil passage 10 disposed on the upper valve plate and used for connection with the oil filter, an oil hole A disposed on the intermediate partition plate, and an oil passage 1 disposed on the support plate. The oil passage 1 is connected to the oil filter through the oil hole A and the oil passage 10.

[0018] The first oil circuit includes: an oil hole K set on the middle partition plate and an oil hole N set on the upper valve plate. The oil hole N is connected to the oil passage 1 through the oil hole K, and the oil inlet of the electronic pump is connected to the oil hole N.

[0019] The second oil circuit includes: oil holes B, C, and D on the intermediate partition plate; oil passage 2 on the support plate; oil holes 11A and 11 on the upper valve plate; and a first flow direction, a second flow direction, and a third flow direction connected to the oil passage 11. The oil inlet of the mechanical pump's pumping chamber is connected to the oil passage 1 through oil hole C; the oil outlet of the mechanical pump's pumping chamber is connected to the oil passage 2 through oil hole D; and the oil passage 11 is connected to the oil passage 2 through oil holes 11A and B.

[0020] The first flow direction is used for oil pressure detection;

[0021] The second flow direction is used to stabilize the oil pressure of high-pressure oil; it is also used to lubricate the parts that need to be lubricated.

[0022] The third flow direction is used to control the engagement and disengagement of the clutch; to prevent clutch jerking; and to relieve pressure.

[0023] Optionally, the first flow direction includes: an oil passage 17 and an oil hole 17A disposed on the upper valve plate, the oil passage 17 being connected to the oil passage 11, and a pressure sensor being connected to the oil passage 17 through the oil hole 17A, the pressure sensor being used to detect the oil pressure in the oil passage 11.

[0024] Optionally, the second flow direction includes: oil passage 14, oil hole 14A, oil hole 16A, oil hole 16B, oil passage 16, oil hole R, oil hole 15A, oil hole 15B, oil hole 15C, oil passage 15, pilot valve, and valve core disposed on the upper valve plate.

[0025] Oil holes 16A and 16B are connected through oil passage 16, oil holes 15A, 15B and 15C are connected through oil passage 15, oil hole 14A is connected to oil passage 14; oil passage 14 is connected to oil passage 11, oil holes 14A and 16B are connected through a pilot valve, and oil hole 15A is connected to the oil outlet passage of the electronic pump.

[0026] Oil holes 16A, 15C, R, and 15B are connected via a valve core. When the pressure requirements are met, oil holes 16A and 15C are connected, and oil holes R and 15B are connected.

[0027] Specifically, when the oil pressure in oil hole 16A reaches the first set value, the valve core is pushed to move so that oil hole R and oil hole 15B are connected.

[0028] When the oil pressure in oil hole 16A reaches the second set value, the valve core is pushed to move, so that oil hole 16A and oil hole 15C are connected, and oil hole R and oil hole 15B are connected.

[0029] Optionally, the third flow direction includes: oil holes F, G, and H provided on the intermediate partition plate, oil passage 4 provided on the support plate, a first branch, a second branch, and a third branch, and oil passage 4 is connected to oil passage 11 through oil hole F;

[0030] The first branch is used to stabilize the oil pressure of the high-pressure oil and to lubricate the parts to be lubricated;

[0031] The second branch is used to control the engagement and disengagement of the clutch; it is used to prevent clutch jerking.

[0032] The third branch is used for pressure relief.

[0033] Specifically, the first branch includes: an oil passage 3 set on the support plate, an oil hole E set on the intermediate partition plate, and an oil hole R, an oil hole 15A, an oil hole 15B, and an oil passage 15 set on the upper valve plate; the oil passage 3 is connected to the oil passage 4, and the oil hole R is connected to the oil passage 3 through the oil hole E.

[0034] The second branch includes: oil holes G, J, and L on the middle partition plate; oil holes 13A, 13B, 13, and P on the upper valve plate; oil passage 5 and 5A on the support plate; a switch valve; and an accumulator.

[0035] Oil hole 13B is connected to oil passage 4 through oil hole G; oil hole 13A and oil hole 13B are connected through oil passage 13; oil hole 13A is connected to oil hole P through a switching valve; oil passage 5 is connected to oil hole P through oil hole J; clutch oil passage is connected to oil passage 5 through oil hole 5A; and accumulator mounted on the support frame is connected to oil passage 5 through oil hole L.

[0036] The third branch includes: an oil hole H located on the intermediate partition plate, oil holes 12A and 12B located on the upper valve plate, an oil passage 12, and a safety valve; the safety valve is located at oil hole 12B.

[0037] Oil hole 12B is connected to oil passage 4 through oil hole H, and oil hole 12A is connected to oil hole 12B through oil passage 12, and oil hole 12A is connected to the reducer cavity.

[0038] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0039] This invention combines a mechanical pump and an electronic pump to adjust the mode of the hybrid transmission, meeting the diverse needs of the vehicle's ICE direct drive, parallel drive, series drive, and pure electric drive. By setting up a valve body and controlling the oil pressure of the valve body through a pilot valve, the oil circuit is controlled, thereby maintaining a constant pressure value in the hydraulic system, making the clutch engagement more stable and reducing jerking.

[0040] By integrating the intermediate partition, support plate, and upper valve plate into a single unit, and integrating the hydraulic system components onto the support plate, the overall structure becomes more compact and simplified, thereby improving the reliability and stability of the system. Attached Figure Description

[0041] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the invention. These drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, but do not constitute a limitation on the embodiments of the present invention.

[0042] Figure 1 This is a hydraulic schematic diagram of an integrated hydraulic control system for a hybrid transmission according to the present invention.

[0043] Figure 2 This is a schematic diagram of the support plate according to the present invention.

[0044] Figure 3 This is a schematic diagram of the structure of the intermediate partition according to the present invention.

[0045] Figure 4 This is a schematic diagram of the upper valve plate according to the present invention.

[0046] Figure 5 This is a schematic diagram of the structure of an integrated hydraulic control device for a hybrid transmission according to the present invention.

[0047] Figure 6 This is another structural schematic diagram of an integrated hydraulic control device for a hybrid transmission according to the present invention.

[0048] Figure 7 This is a connection diagram of the switching valve according to the present invention.

[0049] Figure 8 This is a schematic diagram of the connection of the pilot valve according to the present invention.

[0050] Figure 9 This is a schematic diagram of the valve core connection according to the present invention.

[0051] Figure 10 This is a schematic diagram of the clutch connection according to the present invention.

[0052] Attached reference numerals: 1-Support plate, 2-Intermediate partition plate, 3-Upper valve plate, 4-Oil filter, 5-Mechanical pump, 6-Switch valve, 7-Pilot valve, 8-Valve core, 9-Accumulator, 10-Clutch, 11-Clutch oil passage. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0054] It should also be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings.

[0055] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0056] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0057] Where there is no conflict, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0058] Example 1

[0059] like Figure 1 As shown, an integrated hydraulic control system for a hybrid transmission includes: an electronic pump, a mechanical pump 5, an oil filter, a switching valve 6, an accumulator 9, a pilot valve 7, a valve core 8, an oil cooler, a pressure sensor, and a safety check valve.

[0060] The oil inlet of the electronic pump and the oil inlet of the mechanical pump 5 are both connected to the oil tank through an oil filter. The oil outlet of the mechanical pump 5 is connected to the multi-plate clutch 10 through the switching valve 6 after being connected in series with the first check valve and the second check valve. The accumulator 9 is connected to the oil passage between the switching valve 6 and the multi-plate clutch 10.

[0061] The oil outlet of the electronic pump is connected to the third check valve and then to the parts to be lubricated via an oil cooler;

[0062] The inlet of the pilot valve 7 and the valve core 8 are connected to the oil passage between the first check valve and the second check valve, and the outlet of the valve core 8 is connected to the oil passage between the third check valve and the oil cooler. The pilot valve 7 is used to control the opening of the valve core 8 according to the pressure.

[0063] The pressure sensor is used to detect the oil passage between the first check valve and the second check valve. The oil inlet of the safety check valve is connected to the oil passage between the first check valve and the second check valve, and the oil outlet of the safety check valve is connected to the oil tank.

[0064] Example 2

[0065] like Figures 2-10 As shown, this embodiment provides an integrated hydraulic control device for a hybrid transmission based on the hydraulic principle in Embodiment 1, including: a support plate 1, an intermediate partition plate 2, and an upper valve plate 3 for fixing a multi-plate clutch 10. The first side of the intermediate partition plate 2 is sealed and fitted with the support plate 1, and the second side of the intermediate partition plate 2 is sealed and fitted with the upper valve plate 3. An oil filter and a mechanical pump 5 are fixedly connected to the upper valve plate 3, and the pumping chamber of the mechanical pump 5 is located inside the upper valve plate 3.

[0066] Multiple support-side oil passages are provided on the sealing surface of the support plate 1 and the intermediate partition plate 2, and multiple valve-side oil passages are provided on the sealing surface of the upper valve plate 3 and the intermediate partition plate 2.

[0067] The support plate 1 is also provided with an oil hole 5A that connects to the clutch oil passage 11, and the upper valve plate 3 is also provided with a valve plate side oil hole that connects to the switching valve 6, oil filter, pilot valve 7, valve core 8, and electric pump; the intermediate partition plate 2 is provided with an intermediate oil hole that connects the support side oil passage and the valve plate side oil passage.

[0068] The intermediate partition 2 is sealed to the support plate 1 and the upper valve plate 3. The oil passage on the support side is obtained by assembling the groove on the side of the support plate 1 and the intermediate partition 2. The oil passage on the valve plate side is obtained by assembling the groove on the side of the upper valve plate 3 and the intermediate partition 2.

[0069] The device includes a main oil circuit, a first oil circuit, and a second oil circuit;

[0070] The main oil circuit includes: an oil passage 10 disposed on the upper valve plate 3 and used for connection with the oil filter, an oil hole A disposed on the intermediate partition plate 2 and an oil passage 1 disposed on the support plate 1, the oil passage 1 being connected to the oil filter through the oil hole A and the oil passage 10;

[0071] After the main oil circuit introduces lubricating oil from the oil filter into oil passage 1, there are two oil passages, including the first oil passage and the second oil passage.

[0072] The first oil circuit includes: an oil hole K set on the intermediate partition plate 2 and an oil hole N set on the upper valve plate 3. The oil hole N is connected to the oil passage 1 through the oil hole K, and the oil inlet of the electronic pump is connected to the oil hole N.

[0073] The second oil passage includes: oil holes B, C, and D on the intermediate partition plate 2; oil passage 2 on the support plate 1; oil holes 11A and oil passage 11 on the upper valve plate 3; and a first flow direction, a second flow direction, and a third flow direction connected to the oil passage 11. The oil inlet of the pumping chamber of the mechanical pump 5 is connected to the oil passage 1 through oil hole C, and the oil outlet of the pumping chamber of the mechanical pump 5 is connected to the oil passage 2 through oil hole D. The oil passage 11 is connected to the oil passage 2 through oil holes 11A and B.

[0074] The second oil passage passes through the oil hole C of the intermediate partition 2, reaches the pumping chamber of the mechanical oil pump, and then flows out through the oil hole D of the intermediate partition 2. At this point, it is already high-pressure oil.

[0075] The flow direction of the high-pressure oil in the second oil circuit is described below. After passing through the oil hole D of the intermediate partition 2, the lubricating oil flows through the flow channel 2 and through the oil hole 11A of the upper valve plate 3. At the same time, a one-way valve is installed there. The lubricating oil reaches the oil passage 11 of the upper valve plate 3. In the oil passage 11, the lubricating oil has three flow directions:

[0076] The first flow direction is used for oil pressure detection; the first flow direction includes: oil passage 17 and oil hole 17A provided on the upper valve plate 3, oil passage 17 is connected to oil passage 11, and pressure sensor is connected to oil passage 17 through oil hole 17A. The pressure sensor is used to detect the oil pressure in oil passage 11.

[0077] The second flow direction is used to stabilize the oil pressure of high-pressure oil; it is also used to lubricate the parts to be lubricated; the second flow direction includes: oil passage 14, oil hole 14A, oil hole 16A, oil hole 16B, oil passage 16, oil hole R, oil hole 15A, oil hole 15B, oil hole 15C, oil passage 15, pilot valve 7, and valve core 8 provided on the upper valve plate 3;

[0078] Oil holes 16A and 16B are connected through oil passage 16, oil holes 15A, 15B and 15C are connected through oil passage 15, oil hole 14A is connected to oil passage 14; oil passage 14 is connected to oil passage 11, oil holes 14A and 16B are connected through pilot valve 7, and oil hole 15A is connected to the oil outlet passage of the electronic pump.

[0079] Oil holes 16A, 15C, R and 15B are connected by valve core 8. When the pressure requirements are met, oil holes 16A and 15C are connected, and oil holes R and 15B are connected.

[0080] Specifically, when the oil pressure in oil hole 16A reaches the first set value, the valve core 8 is pushed to move so that oil hole R and oil hole 15B are connected.

[0081] When the oil pressure in oil hole 16A reaches the second set value, the valve core 8 is pushed to move so that oil hole 16A and oil hole 15C are connected, and oil hole R and oil hole 15B are connected.

[0082] The working principle of the second flow direction is as follows: the oil passes through the oil passage 14 of the upper valve plate 3 and reaches the oil hole 14A of the upper valve plate 3. Because the bottom of the oil hole 14A and the oil hole 16B of the upper valve plate 3 are connected through the pilot valve 7, the lubricating oil can reach the oil hole 16B of the upper valve plate 3 through the oil hole 14A.

[0083] The flow rate of lubricating oil from oil hole 14A to oil hole 16B of upper valve plate 3 can be controlled by adjusting pilot valve 7. The lubricating oil passes through oil hole 16B of upper valve plate 3 to reach oil passage 16 of upper valve plate 3, and finally reaches oil hole 16A of upper valve plate 3.

[0084] The bottoms of oil holes 16A, 15C, R, and 15B on the upper valve plate 3 are connected through the valve core 8, but they are not interconnected. Only oil holes 16A and 15C are connected due to pressure requirements, and oil holes R and 15B are connected due to pressure requirements. The other oil holes are not interconnected.

[0085] When the lubricating oil pressure flowing to the oil hole 16A of the upper valve plate 3 reaches a certain value, the lubricating oil will push the valve core 8, causing the oil holes R and 15B of the upper valve plate 3 to connect. When the pressure continues to increase, at the same time as the oil holes R and 15B of the upper valve plate 3 connect, the oil holes 16A and 15C of the upper valve plate 3 will also connect. This ensures the stability of the oil pressure in the high-pressure oil passage.

[0086] The lubricating oil passing through oil hole 15C reaches oil passage 15, and finally flows into the oil outlet passage of the electronic oil pump through oil hole 15A, together lubricating gears, bearings and other components.

[0087] The third flow direction is used to control the oil pressure of high-pressure oil; to lubricate the parts to be lubricated; to control the engagement and disengagement of the clutch; to prevent clutch jerking; and to relieve pressure.

[0088] The third flow path includes: oil holes F, G, and H on the intermediate partition 2; oil passage 4 on the support plate 1; and a first branch, a second branch, and a third branch. Oil passage 4 is connected to oil passage 11 via oil hole F. The lubricating oil passes through oil hole F in the intermediate partition 2 and reaches oil passage 4 in the support plate 1. After passing through oil passage 4, the lubricating oil has three branches:

[0089] The first branch is used to stabilize the oil pressure of the high-pressure oil and to lubricate the parts to be lubricated; the first branch includes: an oil passage 3 set on the support plate 1, an oil hole E set on the intermediate partition plate 2, and an oil hole R, an oil hole 15A, an oil hole 15B, and an oil passage 15 set on the upper valve plate 3; the oil passage 3 is connected to the oil passage 4, and the oil hole R is connected to the oil passage 3 through the oil hole E.

[0090] Lubricating oil flows into the oil passage 3 of the support plate 1, passes through the oil hole E of the intermediate partition plate 2, reaches the oil hole R of the upper valve plate 3, flows through the oil hole 15B of the upper valve plate 3, and finally reaches the oil passage 15 of the upper valve plate 3. It then flows into the oil outlet passage of the electronic oil pump through the oil hole 15A, thus lubricating gears, bearings and other components.

[0091] The second branch is used to control the engagement and disengagement of the clutch; it is used to prevent the clutch 10 from jerking; the second branch includes: oil holes G, J and L provided on the intermediate partition plate 2, oil holes 13A, 13B and 13 and P provided on the upper valve plate 3, oil passage 5 and oil hole 5A provided on the support plate 1, switch valve 6, and accumulator 9.

[0092] Oil hole 13B is connected to oil passage 4 through oil hole G. Oil holes 13A and 13B are connected through oil passage 13. Oil hole 13A is connected to oil hole P through switch valve 6. Oil passage 5 is connected to oil hole P through oil hole J. Clutch oil passage 11 is connected to oil passage 5 through oil hole 5A. Accumulator 9, mounted on the support frame, is connected to oil passage 5 through oil hole L.

[0093] The lubricating oil passes through the oil hole G of the intermediate partition 2, reaches the oil hole 13B of the upper valve plate 3 (where a one-way valve is installed), then reaches the oil passage 13 of the upper valve plate 3, then flows into the oil hole 13A of the upper valve plate 3, and then passes through the oil hole P of the upper valve plate 3.

[0094] The bottom of the oil hole 13A and the oil hole P of the upper valve plate 3 are connected by the switching valve 6. The connection and closing of the oil hole 13A and the oil hole P can be controlled by controlling the switching valve 6. The lubricating oil then reaches the oil passage 5 of the support plate 1 through the oil hole J of the intermediate partition plate 2.

[0095] Finally, lubricating oil flows into the oil passage of clutch 10 through the oil hole 5A of support plate 1 to control the disengagement and engagement of clutch 10. The oil hole L of intermediate partition plate 2 is a hole connecting the oil passage 5 of support plate 1 and accumulator 9. When the oil pressure impact through oil passage 5 is too large, accumulator 9 can absorb part of the impact in time to prevent clutch 10 from jerking.

[0096] The third branch is used for pressure relief and includes: an oil hole H on the intermediate partition plate 2, oil holes 12A and 12B, an oil passage 12 on the upper valve plate 3, and a safety valve; the safety valve is located at oil hole 12B. Oil hole 12B is connected to oil passage 4 through oil hole H, and oil hole 12A is connected to oil hole 12B through oil passage 12, and oil hole 12A is connected to the reducer cavity.

[0097] The lubricating oil passes through the oil hole H of the intermediate partition 2 and reaches the oil hole 12B of the upper valve plate 3. A safety valve is installed at this point. When the oil pressure at this point is too high, the safety valve will open automatically. The lubricating oil then passes through the oil passage 12 of the upper valve plate 3 and reaches the oil hole 12A of the upper valve plate 3. The oil hole 12A is a through hole, and the lubricating oil flows directly into the reducer cavity through the oil hole 12A.

[0098] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0099] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0100] Those skilled in the art should understand that the above embodiments are merely for illustrating the present invention and are not intended to limit the scope of the invention. Those skilled in the art can make other changes or modifications based on the above invention, and these changes or modifications still fall within the scope of the present invention.

Claims

1. An integrated hydraulic control system for a hybrid transmission, characterized in that, include: Electronic pump, mechanical pump (5), oil filter, switching valve (6), accumulator (9), pilot valve (7), valve core (8) and oil cooler; The oil inlet of the electronic pump and the oil inlet of the mechanical pump (5) are both connected to the oil tank through the oil filter. The oil outlet of the mechanical pump (5) is connected to the multi-plate clutch (10) through the switching valve (6) after being connected in series with the first check valve and the second check valve. The accumulator (9) is connected to the oil passage between the switching valve (6) and the multi-plate clutch (10). The oil outlet of the electronic pump is connected to the third check valve and then to the component to be lubricated via the oil cooler. The inlet of the pilot valve (7) and the valve core (8) are connected to the oil passage between the first check valve and the second check valve, and the outlet of the valve core (8) is connected to the oil passage between the third check valve and the oil cooler. The pilot valve (7) is used to control the opening of the valve core (8) according to the pressure. It also includes: a support plate (1), an intermediate partition plate (2) and an upper valve plate (3) for fixing the multi-plate clutch (10), wherein the first side of the intermediate partition plate (2) is sealed and fitted with the support plate (1), the second side of the intermediate partition plate (2) is sealed and fitted with the upper valve plate (3), and an oil filter and a mechanical pump (5) are fixedly connected on the upper valve plate (3), and the pumping chamber of the mechanical pump (5) is located inside the upper valve plate (3); Multiple support-side oil passages are provided on the sealing surfaces of the support plate (1) and the intermediate partition plate (2), and multiple valve-side oil passages are provided on the sealing surfaces of the upper valve plate (3) and the intermediate partition plate (2); wherein, the support-side oil passages are obtained by assembling the grooves provided on the side of the support plate (1) and the intermediate partition plate (2); the valve-side oil passages are obtained by assembling the grooves provided on the side of the upper valve plate (3) and the intermediate partition plate (2); The support plate (1) is also provided with an oil hole 5A that connects to the clutch oil passage (11), and the upper valve plate (3) is also provided with a valve plate side oil hole that connects to the switching valve (6), oil filter, pilot valve (7), valve core (8), and electric pump; the intermediate partition plate (2) is provided with an intermediate oil hole that connects the support side oil passage and the valve plate side oil passage.

2. The integrated hydraulic control system for a hybrid transmission according to claim 1, characterized in that, It also includes a pressure sensor and a safety check valve. The pressure sensor is used to detect the oil pressure in the oil passage between the first check valve and the second check valve. The oil inlet of the safety check valve is connected to the oil passage between the first check valve and the second check valve, and the oil outlet of the safety check valve is connected to the oil tank.

3. The integrated hydraulic control system for a hybrid transmission according to claim 1, characterized in that, The hydraulic control system includes a main oil circuit, a first oil circuit, and a second oil circuit; The main oil circuit includes: an oil passage 10 disposed on the upper valve plate (3) and used to connect with the oil filter, an oil hole A disposed on the middle partition plate (2) and an oil passage 1 disposed on the support plate (1), the oil passage 1 being connected to the oil filter through the oil hole A and the oil passage 10; The first oil circuit includes: an oil hole K set on the middle partition plate (2) and an oil hole N set on the upper valve plate (3). The oil hole N is connected to the oil passage 1 through the oil hole K, and the oil inlet of the electronic pump is connected to the oil hole N. The second oil circuit includes: oil holes B, C and D set on the middle partition plate (2), oil passage 2 set on the support plate (1), oil hole 11A and oil passage 11 set on the upper valve plate (3), and the first flow direction, the second flow direction and the third flow direction connected to the oil passage 11. The oil inlet of the pumping chamber of the mechanical pump (5) is connected to the oil passage 1 through oil hole C, the oil outlet of the pumping chamber of the mechanical pump (5) is connected to the oil passage 2 through oil hole D, and the oil passage 11 is connected to the oil passage 2 through oil hole 11A and oil hole B. The first flow direction is used for oil pressure detection; The second flow direction is used to stabilize the oil pressure of high-pressure oil; it is also used to lubricate the parts that need to be lubricated. The third flow direction is used to control the engagement and disengagement of the clutch; to prevent clutch (10) from jerking; and to relieve pressure.

4. The integrated hydraulic control system for a hybrid transmission according to claim 3, characterized in that, The first flow direction includes: an oil passage 17 and an oil hole 17A disposed on the upper valve plate (3), the oil passage 17 being connected to the oil passage 11, and a pressure sensor being connected to the oil passage 17 through the oil hole 17A. The pressure sensor is used to detect the oil pressure in the oil passage 11.

5. The integrated hydraulic control system for a hybrid transmission according to claim 4, characterized in that, The second flow direction includes: oil passage 14, oil hole 14A, oil hole 16A, oil hole 16B, oil passage 16, oil hole R, oil hole 15A, oil hole 15B, oil hole 15C, oil passage 15, pilot valve (7), and valve core (8) provided on the upper valve plate (3). Oil holes 16A and 16B are connected through oil passage 16, oil holes 15A, 15B and 15C are connected through oil passage 15, oil hole 14A is connected to oil passage 14; oil passage 14 is connected to oil passage 11, oil holes 14A and 16B are connected through pilot valve (7), and oil hole 15A is connected to the oil outlet passage of the electronic pump. Oil holes 16A, 15C, R and 15B are connected by valve core (8). When the pressure requirements are met, oil holes 16A and 15C are connected, and oil holes R and 15B are connected.

6. The integrated hydraulic control system for a hybrid transmission according to claim 5, characterized in that, When the oil pressure in oil hole 16A reaches the first set value, the valve core (8) is pushed to move so that oil hole R and oil hole 15B are connected. When the oil pressure in oil hole 16A reaches the second set value, the valve core (8) is pushed to move so that oil hole 16A and oil hole 15C are connected, and oil hole R and oil hole 15B are connected.

7. The integrated hydraulic control system for a hybrid transmission according to claim 5, characterized in that, The third flow direction includes: oil holes F, G and H are provided on the intermediate partition plate (2), oil channel 4 is provided on the support plate (1), first branch, second branch and third branch, and oil channel 4 is connected to oil channel 11 through oil hole F; The first branch is used to stabilize the oil pressure of the high-pressure oil and to lubricate the parts to be lubricated; The second branch is used to control the engagement and disengagement of the clutch; it is used to prevent the clutch (10) from jerking. The third branch is used for pressure relief.

8. The integrated hydraulic control system for a hybrid transmission according to claim 7, characterized in that, The first branch includes: an oil passage 3 set on the support plate (1), an oil hole E set on the intermediate partition plate (2), and an oil hole R, an oil hole 15A, an oil hole 15B, and an oil passage 15 set on the upper valve plate (3); the oil passage 3 is connected to the oil passage 4, and the oil hole R is connected to the oil passage 3 through the oil hole E. The second branch includes: oil holes G, J, and L on the middle partition plate (2), oil holes 13A, 13B, 13, and P on the upper valve plate (3), oil passage 5 and 5A on the support plate (1), a switch valve (6), and an accumulator (9). Oil hole 13B is connected to oil passage 4 through oil hole G. Oil hole 13A and oil hole 13B are connected through oil passage 13. Oil hole 13A is connected to oil hole P through switch valve (6). Oil passage 5 is connected to oil hole P through oil hole J. Clutch oil passage (11) is connected to oil passage 5 through oil hole 5A. Accumulator (9) installed on support frame is connected to oil passage 5 through oil hole L. The third branch includes: an oil hole H set on the middle partition plate (2), an oil hole 12A, an oil hole 12B, an oil passage 12 set on the upper valve plate (3), and a safety valve; the safety valve is set at the oil hole 12B. Oil hole 12B is connected to oil passage 4 through oil hole H, and oil hole 12A is connected to oil hole 12B through oil passage 12, and oil hole 12A is connected to the reducer cavity.

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