Hybrid hydraulic control system and method

Abstract

The present invention discloses a hybrid hydraulic control system and method, relating to the technical field of hybrid hydraulic systems. The method comprises: an electronic pump control circuit, with its inlet connected to a fuel tank and its first output channel connected to a main oil pressure regulating circuit; a first regulating valve, with its oil inlet connected to a second output channel and its oil outlet connected to a cooling and lubricating oil circuit; a mechanical pump control circuit, with its inlet connected to a fuel tank and its outlet connected to the main oil pressure regulating circuit; a cooling flow regulating circuit, with its oil inlet connected to the main oil pressure regulating circuit and its outlet connected to the cooling and lubricating oil circuit; a first solenoid valve, with its oil inlet connected to the main oil pressure regulating circuit and its outlet connected to a control end of the first regulating valve; a parking control circuit, with its oil inlet connected to the main oil pressure regulating circuit; a second solenoid valve, with its oil inlet connected to the main oil pressure regulating circuit; and a clutch control circuit, with its oil inlet connected to the main oil pressure regulating circuit. This system can avoid unnecessary energy loss.

Description

Technical Field

[0001] The present invention relates to the technical field of hybrid power hydraulic systems, and in particular to a hybrid power hydraulic control system and method. Background Art

[0002] Current hybrid automatic transmission hydraulic systems generally utilize a dual pump configuration (mechanical pump + mechanical pump or electronic pump + mechanical pump) as the hydraulic control system's power source. The electronic pump + mechanical pump configuration is the most common, as it can be decoupled from the engine and vehicle speed. However, current hydraulic control systems lack flexibility in controlling the electronic pump's flow rate, failing to readily adjust whether the electric pump is used for pressure building or cooling and lubrication based on actual operating conditions. This results in unnecessary energy loss. Furthermore, the electronic pump's constant switching between startup and shutdown modes in actual operating conditions can cause sudden changes in hydraulic system flow rate, leading to fluctuations in the hydraulic system's main oil circuit pressure. This can negatively impact clutch control, reduce vehicle comfort, and shorten clutch life.

[0003] Currently, many foreign regions have mandatory regulations requiring passenger car transmissions to have parking systems. To meet the future demand for domestic products to be exported, passenger car transmissions must have parking control mechanisms. This brings additional control requirements, increases the difficulty of product space layout and the requirements for controller control channel resources. Summary of the Invention

[0004] The present invention aims to address at least one of the technical problems existing in the prior art. To this end, the present invention proposes a hybrid hydraulic control system and method that can adjust whether the electric pump is used for pressure building or cooling and lubrication according to actual operating conditions, thereby avoiding unnecessary energy loss. By controlling the flow direction of the electric pump, the main oil circuit oil pressure fluctuations during the electronic pump startup are reduced. Furthermore, while integrating the parking mechanism control, the controller control channels and the number of solenoid valves are not increased, which reduces the difficulty of product layout and reduces product cost.

[0005] In one aspect, a hybrid hydraulic control system according to an embodiment of the present invention includes:

[0006] An electronic pump control circuit, wherein the inlet end of the electronic pump control circuit is connected to the oil tank, the electronic pump control circuit has a first output channel and a second output channel, and the first output channel is connected to the main oil pressure regulating oil circuit;

[0007] a first regulating valve, an oil inlet of which is connected to the second output channel, and an oil outlet of the first regulating valve is connected to a cooling and lubricating oil circuit;

[0008] a mechanical pump control circuit, wherein the inlet end of the mechanical pump control circuit is connected to the oil tank, and the outlet end of the mechanical pump control circuit is connected to the main oil pressure regulating oil circuit;

[0009] A cooling flow regulating circuit, the oil inlet of which is connected to the main oil pressure regulating oil circuit, and the oil outlet of the cooling flow regulating circuit is connected to the cooling lubricating oil circuit;

[0010] a first solenoid valve, an oil inlet of which is connected to the main oil pressure regulating oil circuit, and an oil outlet of the first solenoid valve is connected to a control end of the first regulating valve;

[0011] A parking control circuit, wherein the oil inlet is connected to the main oil pressure regulating oil circuit, and the control end of the parking control circuit is connected to the oil outlet of the first solenoid valve; the oil pressure at the oil outlet of the first solenoid valve is used to control the opening and closing of the parking control circuit and the first regulating valve, and the opening oil pressure of the parking control circuit is lower than the opening oil pressure of the first regulating valve;

[0012] a second solenoid valve, the oil inlet of which is connected to the main oil pressure regulating oil circuit;

[0013] The clutch control circuit has an oil inlet connected to the main oil pressure regulating oil circuit, and a control end of the clutch control circuit is connected to the oil outlet of the second solenoid valve.

[0014] According to some embodiments of the present invention, the electronic pump control circuit includes:

[0015] an electronic pump, wherein an inlet end of the electronic pump is connected to the oil tank;

[0016] a second regulating valve, wherein the oil inlet of the second regulating valve is connected to the outlet end of the electronic pump, and the oil outlet of the second regulating valve is connected to the main oil pressure regulating oil circuit;

[0017] a third regulating valve, wherein the oil inlet of the third regulating valve is connected to the outlet end of the electronic pump, and the oil outlet of the third regulating valve is connected to the oil inlet of the first regulating valve;

[0018] The operating speed of the electronic pump is decoupled from the engine speed and the transmission speed.

[0019] According to some embodiments of the present invention, the mechanical pump control circuit comprises:

[0020] a mechanical pump, wherein an inlet end of the mechanical pump is connected to the oil tank;

[0021] a fourth regulating valve, wherein the oil inlet of the fourth regulating valve is connected to the outlet end of the mechanical pump, and the oil outlet of the fourth regulating valve is connected to the main oil pressure regulating oil circuit;

[0022] The operating speed of the mechanical pump is coupled to the engine speed, the transmission speed, or the drive motor speed.

[0023] According to some embodiments of the present invention, the cooling flow regulating circuit includes:

[0024] a third solenoid valve, wherein the oil inlet of the third solenoid valve is connected to the main oil pressure regulating oil circuit;

[0025] The fifth regulating valve, the first control end of the fifth regulating valve is connected to the oil outlet of the third solenoid valve, the second control end of the fifth regulating valve is connected to the main oil pressure regulating oil circuit, the oil inlet of the fifth regulating valve is connected to the main oil pressure regulating oil circuit, the first oil outlet of the fifth regulating valve is connected to the cooling and lubricating oil circuit through the damping hole, and the second oil outlet of the fifth regulating valve is connected to the inlet end of the mechanical pump.

[0026] According to some embodiments of the present invention, the parking control circuit includes:

[0027] a sixth regulating valve, wherein a control end of the sixth regulating valve is connected to the oil outlet of the first solenoid valve, and an oil inlet of the sixth regulating valve is connected to the main oil pressure regulating oil circuit;

[0028] The parking piston is connected to the first oil outlet of the sixth regulating valve, and the second oil outlet of the sixth regulating valve is connected to the oil tank.

[0029] According to some embodiments of the present invention, the clutch control circuit includes:

[0030] a seventh regulating valve, wherein a first control end of the seventh regulating valve is connected to the oil outlet of the second solenoid valve, and an oil inlet of the seventh regulating valve is connected to the main oil pressure regulating oil circuit;

[0031] a clutch piston connected to the first oil outlet of the seventh regulating valve via a clutch pressure control oil circuit, a second oil outlet of the seventh regulating valve being connected to the oil tank, and the clutch pressure control oil circuit being further connected to the second control end of the seventh regulating valve;

[0032] The oil pressure sensor is used to detect the oil pressure of the clutch pressure control oil circuit.

[0033] According to some embodiments of the present invention, the oil tank is connected to the inlet end of the electronic pump control circuit and the inlet end of the mechanical pump control circuit respectively through a first filter; the main oil pressure regulating oil circuit is connected to the oil inlet of the second solenoid valve through a second filter.

[0034] On the other hand, a hybrid hydraulic control method according to an embodiment of the present invention is applied to the above hybrid hydraulic control system, and the method includes:

[0035] When the mechanical pump control circuit is not operating or is operating at a speed lower than a first preset speed, the first regulating valve is closed, and the flow of the electronic pump control circuit is output to the main oil pressure regulating oil circuit through the first output channel;

[0036] The cooling flow regulating circuit regulates the main oil pressure of the main oil pressure regulating oil circuit and the cooling flow of the cooling lubricating oil circuit;

[0037] Controlling the current of the first solenoid valve by the main oil pressure so that the oil pressure at the oil outlet of the first solenoid valve is between the opening pressure of the parking control circuit and the opening pressure of the first regulating valve, so that the parking control circuit is opened and the first regulating valve is closed;

[0038] The current of the second solenoid valve is controlled by the main oil pressure so that the oil pressure of the clutch pressure control oil circuit meets the clutch torque capacity requirement.

[0039] According to some embodiments of the present invention, the method further comprises:

[0040] When the mechanical pump control circuit operates at a speed higher than the first preset speed and lower than the second preset speed, the first regulating valve opens, and the flow of the electronic pump control circuit is output to the cooling lubricating oil circuit through the second output channel;

[0041] Regulating the main oil pressure of the main oil pressure regulating oil circuit and the cooling flow of the cooling lubricating oil circuit by the cooling flow regulating circuit;

[0042] Controlling the current of the first solenoid valve by the main oil pressure so that the oil pressure at the oil outlet of the first solenoid valve is greater than the opening pressure of the parking control circuit and the first regulating valve, so that both the parking control circuit and the first regulating valve are opened;

[0043] The current of the second solenoid valve is controlled by the main oil pressure so that the oil pressure of the clutch pressure control oil circuit meets the clutch torque capacity requirement.

[0044] According to some embodiments of the present invention, the method further comprises:

[0045] When the mechanical pump control circuit operates at a speed higher than a second preset speed, the flow of the mechanical pump control circuit is output to the main oil pressure regulating oil circuit, the electronic pump control circuit stops operating, and the first regulating valve is closed;

[0046] Regulating the main oil pressure of the main oil pressure regulating oil circuit and the cooling flow of the cooling lubricating oil circuit by the cooling flow regulating circuit;

[0047] Controlling the current of the first solenoid valve by the main oil pressure so that the oil pressure at the oil outlet of the first solenoid valve is between the opening pressure of the parking control circuit and the opening pressure of the first regulating valve, so that the parking control circuit is opened and the first regulating valve is closed;

[0048] The current of the second solenoid valve is controlled by the main oil pressure so that the oil pressure of the clutch pressure control oil circuit meets the clutch torque capacity requirement.

[0049] On the other hand, a computer-readable storage medium according to an embodiment of the present invention stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the hybrid hydraulic control method described above.

[0050] The hybrid hydraulic control system and method according to embodiments of the present invention have at least the following beneficial effects: By actively controlling the opening and closing of the first regulating valve, the electronic pump control circuit can actively switch between providing main oil pressure and providing cooling flow, reducing unnecessary energy consumption. By using a single first solenoid valve to control the opening and closing of both the first regulating valve and the parking control circuit, the controller's control channel resources are reduced, reducing layout space requirements, reducing product size while also lowering costs and enhancing product competitiveness.

[0051] 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

[0052] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments with reference to the following drawings, in which:

[0053] Figure 1 A schematic structural diagram of a hybrid hydraulic control system according to an embodiment of the present invention;

[0054] Figure 2 A flowchart of a hybrid hydraulic control method according to an embodiment of the present invention;

[0055] Figure 3 A flowchart of a hybrid hydraulic control method according to another embodiment of the present invention;

[0056] Figure 4 This is a flowchart of a hybrid hydraulic control method according to another embodiment of the present invention. DETAILED DESCRIPTION

[0057] The embodiments of the present invention are described in detail below. 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 only used to explain the present application and are not to be construed as limiting the present application. The step numbers in the following embodiments are provided only for the convenience of explanation and do not limit the order of the steps. The order of execution of the steps in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.

[0058] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0059] The terms "first," "second," "third," and "fourth," etc., in the specification, claims, and accompanying drawings of the present invention are used to distinguish between different items, not to describe a specific order. Furthermore, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements, but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0060] References to "embodiments" in this disclosure mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the disclosure. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0061] Hybrid automatic transmission hydraulic systems currently utilize a dual pump configuration (mechanical pump + mechanical pump or electronic pump + mechanical pump) as the hydraulic control system's power source. The electronic pump + mechanical pump configuration is the most common, as it can be decoupled from the engine and vehicle speed. However, current hydraulic control systems lack flexible control over the electronic pump's flow rate, unable to dynamically adjust whether the electric pump is used for pressure building or cooling and lubrication based on actual operating conditions, resulting in unnecessary energy loss.

[0062] Currently, many foreign regions have mandatory regulations requiring passenger car transmissions to have parking systems. To meet the future demand for domestic products to be exported, passenger car transmissions must have parking control mechanisms. This brings additional control requirements, increases the difficulty of product space layout and the requirements for controller control channel resources.

[0063] To this end, embodiments of the present invention propose a hybrid hydraulic control system and method. By actively controlling the opening and closing of a first regulating valve, the electronic pump control circuit can actively switch between providing main oil pressure and providing cooling flow, reducing unnecessary energy consumption. By using a single first solenoid valve to control the opening and closing of both the first regulating valve and the parking control circuit, the controller's control channel resources and layout space requirements are reduced, resulting in a smaller product while also lowering costs and enhancing product competitiveness.

[0064] The hybrid hydraulic control system and method according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0065] On the one hand, the embodiment of the present invention provides a hybrid hydraulic control system, such as Figure 1 As shown, the system includes:

[0066] An electronic pump control circuit, the inlet of which is connected to the oil tank 900. The electronic pump control circuit has a first output channel and a second output channel. The first output channel is connected to the main oil pressure regulating oil circuit 1400.

[0067] The first regulating valve 300 has an oil inlet connected to the second output channel, and an oil outlet connected to the cooling lubricating oil circuit 1900;

[0068] A mechanical pump control circuit, the inlet of which is connected to the oil tank 900 , and the outlet of which is connected to the main oil pressure regulating oil circuit 1400 ;

[0069] The oil inlet of the cooling flow regulating circuit is connected to the main oil pressure regulating oil circuit 1400, and the oil outlet of the cooling flow regulating circuit is connected to the cooling lubricating oil circuit 1900;

[0070] The first solenoid valve 400 has an oil inlet connected to the main oil pressure regulating oil circuit 1400, and an oil outlet connected to the control end of the first regulating valve 300;

[0071] The parking control circuit has an oil inlet connected to the main oil pressure regulating oil circuit 1400, and a control end of the parking control circuit is connected to the oil outlet of the first solenoid valve 400. The oil pressure at the oil outlet of the first solenoid valve 400 is used to control the opening and closing of the parking control circuit and the first regulating valve 300, and the opening oil pressure of the parking control circuit is lower than the opening oil pressure of the first regulating valve 300.

[0072] The oil inlet of the second solenoid valve 600 is connected to the main oil pressure regulating oil circuit 1400;

[0073] The clutch control circuit has an oil inlet connected to the main oil pressure regulating oil circuit 1400 , and a control end of the clutch control circuit is connected to the oil outlet of the second solenoid valve 600 .

[0074] Specifically, both the electronic pump control circuit and the mechanical pump control circuit can draw oil from the oil tank 900, thereby providing the system with main oil pressure for pressure buildup and cooling flow for cooling and lubrication. The main oil pressure and cooling flow can be adjusted via the first regulating valve 300 and the cooling flow regulating circuit. When the mechanical pump control circuit is operating at high speed (capable of meeting the system's pressure buildup and cooling flow requirements), under such operating conditions, the flow rate of the mechanical pump control circuit is sufficient to support the hydraulic system in building pressure to the required level and meet the entire tank's cooling flow requirements. Therefore, the electronic pump control circuit can be inoperative, and at this time, the first regulating valve 300 is in a closed state. When the mechanical pump control circuit operates at medium speed (meeting the system pressure building requirement, but not the cooling flow requirement), under such working conditions, the mechanical pump control circuit can provide a part of the flow, and its flow is sufficient to support the hydraulic system to build pressure to the required size, but does not meet the cooling flow requirement of the entire box, so the electronic pump control circuit is needed to assist in the supply of cooling flow. At this time, the first regulating valve 300 needs to be in the open state, and the output flow of the electronic pump control circuit directly enters the cooling lubricating oil circuit 1900. The main oil pressure and cooling flow are adjusted through the cooling flow regulating circuit, and the current of the first solenoid valve 400 is controlled so that the output oil pressure of the first solenoid valve 400 is greater than the opening pressure of the first regulating valve 300 and the parking control circuit, so as to achieve the goal of opening the first regulating valve 300 and the parking control circuit at the same time; the current of the second solenoid valve 600 is controlled so that the oil pressure of the clutch control circuit meets the clutch torque capacity requirement. When the mechanical pump control circuit is operating at low speed (not meeting the system pressure buildup requirements), the mechanical pump control circuit can provide a low flow rate, but this flow rate is insufficient to support the hydraulic system in building pressure to the required level. Therefore, the electronic pump control circuit is required to assist in building pressure. In this case, the first control valve 300 must be closed, and the output flow of the electronic pump control circuit is entirely diverted to the main oil pressure control circuit 1400. The cooling flow control circuit regulates the main oil pressure and cooling flow rate. The current of the first solenoid valve 400 is controlled to ensure that the output oil pressure of the first solenoid valve 400 is between the parking control circuit and the opening pressure of the first control valve 300, achieving the goal of opening the parking control circuit and closing the first control valve 300. The current of the second solenoid valve 600 is controlled to ensure that the oil pressure in the clutch control circuit meets the clutch torque capacity requirements. When the mechanical pump control circuit is not operating, the automatic transmission requires the hydraulic system to have cooling flow control, parking control, and clutch oil pressure control functions under different operating conditions. Vehicle driving requires the vehicle to be in a non-P gear, and power transmission requires the clutch control circuit oil pressure to meet the clutch torque capacity requirements. Therefore, the main oil pressure must reach a certain level.When the mechanical pump control circuit is not working, all the flow of the hydraulic system is supplied by the electronic pump control circuit. The output flow of the electronic pump control circuit must not only establish the system main oil pressure, but also meet the cooling flow demand. At this time, the first regulating valve 300 needs to be in a closed state, and the output flow of the electronic pump control circuit all enters the main oil pressure regulating oil circuit 1400. The main oil pressure and cooling flow are adjusted by the cooling flow regulating circuit, and the current of the first solenoid valve 400 is controlled so that the output oil pressure of the first solenoid valve 400 is between the opening pressure of the parking control circuit and the first regulating valve 300, so as to achieve the goal of opening the parking control circuit and closing the first regulating valve 300; the current of the second solenoid valve 600 is controlled so that the oil pressure of the clutch control circuit meets the clutch torque capacity requirement.

[0075] Thus, the hybrid hydraulic control system according to the embodiment of the present invention, through active control of the opening and closing of the first regulating valve 300, can achieve active switching between providing main oil pressure and providing cooling flow in the electronic pump control circuit, thereby reducing unnecessary energy consumption. By using a single first solenoid valve 400 to control the opening and closing of the first regulating valve 300 and the parking control circuit, the demand for controller control channel resources and layout space requirements are reduced, thereby reducing product size while also lowering costs and improving product competitiveness.

[0076] like Figure 1 As shown, in some embodiments of the present invention, the electronic pump control circuit includes:

[0077] An electronic pump 110, wherein the inlet end of the electronic pump 110 is connected to the oil tank 900;

[0078] A second regulating valve 120 , wherein the oil inlet of the second regulating valve 120 is connected to the outlet of the electronic pump 110 , and the oil outlet of the second regulating valve 120 is connected to the main oil pressure regulating oil circuit 1400 ;

[0079] A third regulating valve 130 , wherein the oil inlet of the third regulating valve 130 is connected to the outlet of the electronic pump 110 , and the oil outlet of the third regulating valve 130 is connected to the oil inlet of the first regulating valve 300 ;

[0080] The second regulating valve 120 forms the first output channel of the electronic pump control circuit, and the third regulating valve 130 forms the second output channel of the electronic pump control circuit. The electronic pump 110 is independently driven by its motor. The operating speed of the electronic pump 110 is decoupled from the engine speed and the transmission speed, allowing its speed to be actively controlled according to the control strategy. The oil outlet of the electronic pump 110 is connected to the oil inlets of the second regulating valve 120 and the third regulating valve 130. The oil outlet of the second regulating valve 120 is connected to the main oil pressure regulating circuit 1400, while the oil outlet of the third regulating valve 130 is connected to the cooling and lubricating oil circuit 1900 through the first regulating valve 300. The opening and closing of the second regulating valve 120 is controlled by the pressure difference between its inlet and outlet ports. When the force generated by the difference between the inlet and outlet pressures exceeds the preset value of the spring built into the second regulating valve 120, the second regulating valve 120 opens, allowing oil to enter the main oil pressure regulating circuit 1400. The opening and closing of the first regulating valve 300 is controlled by the oil pressure at the oil outlet of the first solenoid valve 400 and a spring. When the oil pressure at the oil outlet of the first solenoid valve 400 is greater than a preset value, the first regulating valve 300 opens, and the oil enters the cooling lubricating oil circuit 1900 through the first regulating valve 300 and the third regulating valve 130.

[0081] like Figure 1 As shown, in some embodiments of the present invention, the mechanical pump control circuit includes:

[0082] A mechanical pump 210, wherein the inlet end of the mechanical pump 210 is connected to the oil tank 900;

[0083] The fourth regulating valve 220, the oil inlet of the fourth regulating valve 220 is connected to the outlet of the mechanical pump 210, and the oil outlet of the fourth regulating valve 220 is connected to the main oil pressure regulating oil circuit 1400;

[0084] The operating speed of the mechanical pump 210 is coupled to the engine speed, the transmission speed, or the drive motor speed. The oil outlet of the mechanical pump 210 is connected to the oil inlet of the fourth regulating valve 220, which in turn is connected to the main oil pressure regulating circuit 1400. When the fourth regulating valve 220 is open, the oil provided by the mechanical pump 210 can pass through the fourth regulating valve 220 and enter the main oil pressure regulating circuit 1400.

[0085] like Figure 1 As shown, in some embodiments of the present invention, the cooling flow regulating circuit includes:

[0086] A third solenoid valve 810 , the oil inlet of the third solenoid valve 810 is connected to the main oil pressure regulating oil circuit 1400 ;

[0087] The fifth regulating valve 820 has a first control end connected to the oil outlet of the third solenoid valve 810, a second control end connected to the main oil pressure regulating oil circuit 1400, an oil inlet connected to the main oil pressure regulating oil circuit 1400, a first oil outlet connected to the cooling and lubricating oil circuit 1900 via a damping orifice 830, and a second oil outlet connected to the inlet of the mechanical pump 210. A bypass oil circuit 1500 is formed between the second oil outlet of the fifth regulating valve 820 and the oil tank 900. The cooling flow from the mechanical pump 210 in the cooling lubricating oil circuit 1900 is controlled in coordination by the oil pressure of the main pressure regulating oil circuit and the damping hole 830. When the output flow of the mechanical pump 210 is greater than the hydraulic system requirement, the excess flow is overflowed by the fifth regulating valve 820 and returns to the oil suction port of the mechanical pump 210 through the bypass oil circuit 1500, thereby reducing the oil suction load of the mechanical pump 210.

[0088] like Figure 1 As shown, in some embodiments of the present invention, the parking control circuit includes:

[0089] A sixth regulating valve 510 , wherein the control end of the sixth regulating valve 510 is connected to the oil outlet of the first solenoid valve 400 , and the oil inlet of the sixth regulating valve 510 is connected to the main oil pressure regulating oil circuit 1400 ;

[0090] The parking piston 520 is connected to a first oil outlet of the sixth regulating valve 510 , and a second oil outlet of the sixth regulating valve 510 is connected to the oil tank 900 .

[0091] Specifically, the sixth regulating valve 510 is controlled by the oil pressure at the oil outlet of the first solenoid valve 400. When the oil pressure at the oil outlet of the first solenoid valve 400 is greater than the set value, the sixth regulating valve 510 opens, and the oil inlet and oil outlet of the sixth regulating valve 510 are connected. The pressure oil of the main oil pressure regulating oil circuit 1400 enters the piston chamber of the parking piston 520, pushing the parking piston 520 to move, completing the switching of P gear & NP gear (non-P gear, such as N gear, D gear, R gear, etc.).

[0092] like Figure 1 As shown, in some embodiments of the present invention, the clutch control circuit includes:

[0093] A seventh regulating valve 710 , wherein a first control end of the seventh regulating valve 710 is connected to the oil outlet of the second solenoid valve 600 , and an oil inlet of the seventh regulating valve 710 is connected to the main oil pressure regulating oil circuit 1400 ;

[0094] The clutch piston 720 is connected to the first oil outlet of the seventh regulating valve 710 through the clutch pressure control oil circuit 1800. The second oil outlet of the seventh regulating valve 710 is connected to the fuel tank. The clutch pressure control oil circuit 1800 is also connected to the second control end of the seventh regulating valve 710.

[0095] The oil pressure sensor 730 is used to detect the oil pressure of the clutch pressure control oil circuit 1800.

[0096] Specifically, the piston chamber pressure of the clutch piston 720 is jointly controlled by the seventh regulating valve 710, the second solenoid valve 600 and the oil pressure sensor 730. The second solenoid valve 600 is the pilot control valve of the seventh regulating valve 710. The change in the valve core position of the seventh regulating valve 710 is jointly affected by the spring force of the built-in spring in the seventh regulating valve 710, the oil pressure of the clutch pressure control oil circuit 1800 and the output oil pressure of the second solenoid valve 600. By changing the output oil pressure of the second solenoid valve 600, the equilibrium position of the valve core of the seventh regulating valve 710 is changed, and the oil pressure of the clutch pressure control oil circuit 1800 is controlled.

[0097] Through the combined action of the first solenoid valve 400, the first regulating valve 300 and the sixth regulating valve 510, the hydraulic system can achieve the following functions:

[0098] The output flow of the electronic pump 110 can be controlled according to the needs of the hydraulic system to build pressure or directly enter the cooling and lubricating oil circuit 1900, thereby minimizing unnecessary power loss of the electronic pump 110; by setting the oil pressure of the oil outlet of the first solenoid valve 400 corresponding to different ones when the first regulating valve 300 and the sixth regulating valve 510 are opened, the active control of parking and the flow function of the electronic pump 110 can be achieved using only the first solenoid valve 400.

[0099] Furthermore, if Figure 1 As shown, in some embodiments of the present invention, the oil tank 900 is connected to the inlet of the electronic pump control circuit and the inlet of the mechanical pump control circuit respectively through a first filter 1300; the main oil pressure regulating oil circuit 1400 is connected to the oil inlet of the second solenoid valve 600 through a second filter 1000. The first filter 1300 and the second filter 1000 filter the oil to prevent impurities in the oil from affecting the system.

[0100] Furthermore, if Figure 1 As shown, in some embodiments of the present invention, the oil in the cooling and lubricating oil circuit 1900 passes through the oil cooler 1100 and the bypass valve 1200 to cool and lubricate the system's electronic stator, motor rotor, clutch, bearings, and gears.

[0101] In summary, the composition and functional implementation of the hybrid hydraulic control system of the embodiment of the present invention are described as follows:

[0102] The system mainly consists of the main oil pressure regulating oil circuit 1400, the electronic pump flow control oil circuit 1600, the parking control oil circuit 1700, the clutch pressure control oil circuit 1800, the cooling and lubricating oil circuit 1900 and the bypass oil circuit 1500;

[0103] The main oil pressure regulation function is achieved by the fifth regulating valve 820, a hydraulic valve with its oil inlet connected to the main oil pressure regulation circuit 1400, its first oil outlet connected to the cooling and lubricating oil circuit 1900, and its second oil outlet connected to the bypass oil circuit 1500. The fifth regulating valve 820 controls the flow into the cooling and lubricating oil circuit 1900 and the flow into the bypass oil circuit 1500 by changing the position of its valve core, while simultaneously regulating the pressure in the main oil pressure regulation circuit 1400. The change in the valve core position of the fifth regulating valve 820 is influenced by the spring force of the internal spring of the fifth regulating valve 820, the oil pressure in the main oil pressure control circuit, and the output oil pressure of the third solenoid valve 810. By changing the output oil pressure of the third solenoid valve 810, the equilibrium position of the valve core of the fifth regulating valve 820 is altered, thereby controlling the main oil pressure, the flow in the cooling oil circuit, and the flow in the bypass oil circuit 1500. The third solenoid valve 810 is a proportional pressure solenoid valve.

[0104] The electronic pump flow control function is implemented as follows: the oil outlet of the electronic pump 110 is connected to the oil inlets of the second regulating valve 120 and the third regulating valve 130. The oil outlet of the second regulating valve 120 is connected to the main oil pressure regulating oil circuit 1400, and the oil outlet of the third regulating valve 130 is connected to the cooling and lubricating oil circuit 1900 through the first regulating valve 300. When the second regulating valve 120 is opened, the oil enters the main oil pressure regulating oil circuit 1400, and when the first regulating valve 300 is opened, the oil enters the cooling and lubricating oil circuit 1900.

[0105] Implementation of the parking function: The sixth regulating valve 510 is controlled by the oil pressure of the oil outlet of the first solenoid valve 400. When the oil pressure of the oil outlet of the first solenoid valve 400 is greater than the set value, the sixth regulating valve 510 opens, and the oil inlet and oil outlet of the sixth regulating valve 510 are connected. The pressure oil of the main oil pressure regulating oil circuit 1400 enters the piston chamber of the parking piston 520, pushing the parking piston 520 to move, completing the switching of P gear & NP gear (non-P gear, such as N gear, D gear, R gear, etc.).

[0106] The clutch piston chamber pressure control function is realized: the piston chamber pressure of the clutch piston 720 is jointly controlled by the seventh regulating valve 710, the second solenoid valve 600 and the oil pressure sensor 730. The second solenoid valve 600 is the pilot control valve of the seventh regulating valve 710. The change of the valve core position of the seventh regulating valve 710 is jointly affected by the spring force of the built-in spring in the seventh regulating valve 710, the oil pressure of the clutch pressure control oil circuit 1800 and the output oil pressure of the second solenoid valve 600. By changing the output oil pressure of the second solenoid valve 600, the equilibrium position of the valve core of the seventh regulating valve 710 is changed, and the oil pressure of the clutch pressure control oil circuit 1800 is controlled.

[0107] A single solenoid valve realizes the parking and electronic pump flow control functions: the first regulating valve 300 and the sixth regulating valve 510 are both hydraulic valves. By setting different opening pressures (in this example, based on the current product requirements, the opening pressure of the sixth regulating valve 510 is set to be smaller than the opening pressure of the first regulating valve 300), and connecting the valve core control chamber in parallel to the oil pressure of the oil outlet of the first solenoid valve 400, the function of actively controlling the working modes of the two valve cores can be achieved with one solenoid valve.

[0108] On the other hand, based on the above hybrid hydraulic control system, the embodiment of the present invention also proposes a hybrid hydraulic control method, such as Figure 2 As shown, the method includes the following steps:

[0109] Step S100: When the mechanical pump control circuit is not operating or is operating at a speed lower than a first preset speed, the first regulating valve is closed, and the flow of the electronic pump control circuit is output to the main oil pressure regulating oil circuit 1400 through the first output channel;

[0110] Step S200: regulating the main oil pressure of the main oil pressure regulating oil circuit 1400 and the cooling flow of the cooling lubricating oil circuit 1900 through the cooling flow regulating circuit;

[0111] Step S300: controlling the current of the first solenoid valve 400 by the main oil pressure so that the oil pressure at the oil outlet of the first solenoid valve 400 is between the opening pressure of the parking control circuit and the opening pressure of the first regulating valve 300, thereby opening the parking control circuit and closing the first regulating valve 300;

[0112] Step S400: controlling the current of the second solenoid valve 600 by the main oil pressure so that the oil pressure of the clutch control circuit meets the clutch torque capacity requirement.

[0113] Specifically, for a hybrid automatic transmission, if it is a dual-pump system, the mechanical pump 210 can be driven in the following three ways:

[0114] (1) Coupled with the engine speed, the mechanical pump 210 only works when the engine is driving;

[0115] (2) Coupling with the speed of the driving motor: The mechanical pump 210 will only work when the driving motor is working;

[0116] (3) Coupling with the transmission output speed: The mechanical pump 210 only starts working when the transmission has a speed output.

[0117] Regardless of which of the above driving forms of the mechanical pump 210 is used, the output flow of the mechanical pump 210 is not fixed during the driving process of the entire vehicle, and the flow rate variation range is relatively large. The working process of this hydraulic system is introduced based on the four working conditions of the mechanical pump 210 speed: the mechanical pump 210 is not working, the mechanical pump 210 is running at a low speed, the mechanical pump 210 is running at a medium speed, and the mechanical pump 210 is running at a high speed.

[0118] Mechanical pump 210 does not work:

[0119] Under different working conditions, the automatic transmission requires the hydraulic system to have cooling flow control and adjustment functions, parking control functions and clutch oil pressure control functions. The vehicle needs to be in NP gear when driving, and the power transmission requires the clutch piston chamber pressure to meet the clutch torque capacity requirements. The main oil pressure needs to reach a certain level. When the mechanical pump 210 is not working, all the flow of the hydraulic system is supplied by the electronic pump 110. The output flow of the electronic pump 110 is required to establish the main oil pressure of the system and meet the demand for cooling and lubrication flow. At this time, the first regulating valve 300 needs to be in a closed state, and the output flow of the electronic pump 110 all enters the main oil pressure regulating oil circuit 1400, controls the current of the third solenoid valve 810, and adjusts the main oil pressure and cooling flow through the fifth regulating valve 820 and the damping hole 830; controls the current of the first solenoid valve 400 so that the output oil pressure of the first solenoid valve 400 is between the opening pressure of the sixth regulating valve 510 and the first regulating valve 300, so as to achieve the goal of opening the sixth regulating valve 510 and closing the first regulating valve 300; controls the current of the second solenoid valve 600 so that the oil pressure of the clutch pressure control oil circuit 1800 meets the clutch torque capacity requirement.

[0120] The mechanical pump 210 operates at a low speed (i.e., operates at a speed lower than the first preset speed, at which time the flow rate of the mechanical pump 210 does not meet the system pressure building requirement):

[0121] Under such working conditions, the mechanical pump 210 can provide a part of the flow, but its flow is not enough to support the hydraulic system to build up the pressure to the required level, so the electronic pump 110 is needed to assist in building pressure. At this time, the first regulating valve 300 needs to be in a closed state, and the electronic pump 110 outputs the flow into the main oil pressure regulating oil circuit 1400, controls the current of the third solenoid valve 810, and adjusts the main oil pressure and cooling flow through the fifth regulating valve 820 and the damping hole 830; controls the current of the first solenoid valve 400 so that the output oil pressure of the first solenoid valve 400 is between the opening pressure of the sixth regulating valve 510 and the first regulating valve 300, so as to achieve the goal of opening the sixth regulating valve 510 and closing the first regulating valve 300; controls the current of the second solenoid valve 600 so that the oil pressure of the clutch pressure control oil circuit 1800 meets the clutch torque capacity requirement.

[0122] Furthermore, in some embodiments of the present invention, Figure 3As shown, the hybrid hydraulic control method further includes the following steps:

[0123] Step S500: When the mechanical pump control circuit operates at a speed higher than the first preset speed and lower than the second preset speed, the first regulating valve 300 is opened, and the flow of the electronic pump control circuit is output to the cooling lubricating oil circuit 1900 through the second output channel;

[0124] Step S600: regulating the main oil pressure of the main oil pressure regulating oil circuit 1400 and the cooling flow of the cooling lubricating oil circuit 1900 through the cooling flow regulating circuit;

[0125] Step S700: controlling the current of the first solenoid valve 400 by the main oil pressure so that the oil pressure at the oil outlet of the first solenoid valve 400 is greater than the opening pressure of the parking control circuit and the first regulating valve 300, thereby opening the parking control circuit and the first regulating valve 300;

[0126] Step S800: controlling the current of the second solenoid valve 600 by the main oil pressure so that the oil pressure of the clutch control circuit meets the clutch torque capacity requirement.

[0127] Specifically, when the mechanical pump 210 operates at a medium speed (i.e., the mechanical pump 210 operates at a speed higher than the first preset speed and lower than the second preset speed, the flow rate of the mechanical pump 210 meets the system pressure building requirement but does not meet the cooling flow rate requirement):

[0128] Under such working conditions, the mechanical pump 210 can provide a part of the flow, and its flow is sufficient to support the hydraulic system to build up the pressure to the required size, but it does not meet the cooling flow demand of the entire box, so the electronic pump 110 is needed to assist in the supply of cooling flow. At this time, the first regulating valve 300 needs to be in the open state, and the output flow of the electronic pump 110 directly enters the cooling oil circuit, controls the current of the third solenoid valve 810, and adjusts the main oil pressure and cooling flow through the fifth regulating valve 820 and the damping hole 830; controls the current of the first solenoid valve 400 so that the output oil pressure of the first solenoid valve 400 is greater than the opening pressure of the first regulating valve 300, so as to achieve the goal of both the sixth regulating valve 510 and the first regulating valve 300 being open; controls the current of the second solenoid valve 600 so that the oil pressure of the clutch pressure control oil circuit 1800 meets the clutch torque capacity requirement.

[0129] Furthermore, in some embodiments of the present invention, Figure 4 As shown, the hybrid hydraulic control method further includes the following steps:

[0130] Step S900: When the mechanical pump control circuit operates at a speed higher than the second preset speed, the flow of the mechanical pump control circuit is output to the main oil pressure regulating oil circuit 1400, the electronic pump control circuit stops operating, and the first regulating valve 300 is closed;

[0131] Step S1000: regulating the main oil pressure of the main oil pressure regulating oil circuit 1400 and the cooling flow of the cooling lubricating oil circuit 1900 through the cooling flow regulating circuit;

[0132] Step S1100: controlling the current of the first solenoid valve 400 by the main oil pressure so that the oil pressure at the oil outlet of the first solenoid valve is between the opening pressure of the parking control circuit and the opening pressure of the first regulating valve, thereby opening the parking control circuit and closing the first regulating valve 300;

[0133] Step S1200: Control the current of the second solenoid valve 600 by the main oil pressure so that the oil pressure of the clutch control circuit meets the clutch torque capacity requirement.

[0134] Specifically, when the mechanical pump 210 operates at a high speed (ie, the mechanical pump 210 operates at a speed higher than the second preset speed, and the flow rate of the mechanical pump 210 meets the system pressure building and cooling flow rate requirements):

[0135] Under such working conditions, the flow of the mechanical pump 210 is sufficient to support the hydraulic system to build up the pressure to the required level and meet the cooling flow demand of the entire box, so the electronic pump 110 can be non-operating. At this time, the first regulating valve 300 needs to be in a closed state, and the current of the third solenoid valve 810 is controlled to adjust the main oil pressure and cooling flow provided by the mechanical pump 210 through the fifth regulating valve 820 and the damping hole 830; the current of the first solenoid valve 400 is controlled so that the output oil pressure of the first solenoid valve 400 is between the opening pressure of the sixth regulating valve 510 and the first regulating valve 300, so as to achieve the goal of opening the sixth regulating valve 510 and closing the first regulating valve 300; the current of the second solenoid valve 600 is controlled so that the oil pressure of the clutch pressure control oil circuit 1800 meets the clutch torque capacity requirement. Furthermore, in some embodiments of the present invention, the hybrid control method also includes the following steps:

[0136] Step S1300: When the flow rate change rate of the mechanical pump control circuit exceeds a preset rate, the first regulating valve 300 is opened by controlling the current of the first solenoid valve 400, and the electronic pump 110 is started at the same time, so that the flow rate of the electronic pump control circuit is output to the cooling lubricating oil circuit 1900 through the second output channel;

[0137] Step S1400 : The first regulating valve 300 is gradually changed from an open state to a closed state by controlling the current of the first solenoid valve 400 .

[0138] During this process, the electronic pump 110 completes startup and speed response, and the low-frequency flow pulsation discharged by the electronic pump and the oil with a high gas content directly enter the cooling and lubricating oil circuit 1900 without affecting the main oil circuit. At the same time, the opening change process of the first regulating valve 300 is a gradual process, and the flow change discharged by the electronic pump 110 into the main oil pressure regulating oil circuit 1400 is also a gradual process, which avoids sudden changes in flow and thereby suppresses the main oil circuit oil pressure fluctuation caused by the instantaneous startup of the electronic pump.

[0139] An embodiment of the present application further provides a storage medium, which is a computer-readable storage medium and stores a computer program. When the computer program is executed by a processor, the above-mentioned hybrid hydraulic control method is implemented.

[0140] The memory, as a non-transient computer-readable storage medium, can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some embodiments, the memory optionally includes a memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of the above-mentioned networks include but are not limited to the Internet, an intranet, a local area network, a mobile communication network and a combination thereof. The device embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and are located in one place, or may be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0141] Although specific embodiments are described herein, those skilled in the art will recognize that many other modifications or alternative embodiments are also within the scope of this disclosure. For example, any of the functions and / or processing capabilities described in conjunction with a particular device or component may be performed by any other device or component. In addition, although various exemplary implementations and architectures have been described in accordance with embodiments of the present disclosure, those skilled in the art will recognize that many other modifications to the exemplary implementations and architectures described herein are also within the scope of this disclosure.

[0142] Some aspects of the present disclosure have been described above with reference to the block diagrams and flow charts of the systems, methods, systems and / or computer program products according to the exemplary embodiments. It should be understood that the combination of one or more blocks in the block diagram and the flow chart and the blocks in the block diagram and the flow chart can be realized by executing computer executable program instructions respectively. Equally, according to some embodiments, some blocks in the block diagram and the flow chart may not need to be executed in the order shown, or may not need to be executed in full. In addition, additional components and / or operations beyond those components and / or operations shown in the blocks in the block diagram and the flow chart may be present in certain embodiments.

[0143] Therefore, the blocks in the block diagrams and flow charts support combinations of means for performing the specified functions, combinations of elements or steps for performing the specified functions, and program instruction means for performing the specified functions. It should also be understood that each block in the block diagrams and flow charts, and combinations of blocks in the block diagrams and flow charts, can be implemented by a dedicated hardware computer system that performs the specific functions, elements, or steps, or a combination of dedicated hardware and computer instructions.

[0144] The program modules, applications, etc. described herein may include one or more software components, including, for example, software objects, methods, data structures, etc. Each such software component may include computer-executable instructions that, in response to execution, cause at least a portion of the functionality described herein (e.g., one or more operations of the illustrative methods described herein) to be performed.

[0145] Software component can be encoded with any one in various programming languages.A kind of exemplary programming language can be low-level programming language, such as the assembly language associated with specific hardware architecture and / or operating system platform.Comprise that the software component of assembly language instruction may need to be converted to executable machine code by assembler before being executed by hardware architecture and / or platform.Another exemplary programming language can be a more advanced programming language, and it can be transplanted across multiple architectures.Comprise that the software component of more advanced programming language may need to be converted to intermediate representation by interpreter or compiler before execution.Other examples of programming language include but are not limited to macro language, shell or command language, job control language, script language, database query or search language or report writing language.In one or more exemplary embodiments, the software component that comprises the instruction of one in the above-mentioned programming language example can be directly executed by operating system or other software component, without first being converted into another form.

[0146] Software components can be stored as files or other data storage structures. Software components of similar types or related functions can be stored together, such as in a specific directory, folder, or library. Software components can be static (e.g., preset or fixed) or dynamic (e.g., created or modified at execution time).

[0147] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the scope of the present invention.

Claims

1. A hybrid hydraulic control system, characterized in that: include: An electronic pump control circuit, wherein the inlet end of the electronic pump control circuit is connected to the oil tank, the electronic pump control circuit has a first output channel and a second output channel, and the first output channel is connected to the main oil pressure regulating oil circuit; a first regulating valve, wherein an oil inlet of the first regulating valve is connected to the second output channel, and an oil outlet of the first regulating valve is connected to a cooling and lubricating oil circuit; a mechanical pump control circuit, wherein the inlet end of the mechanical pump control circuit is connected to the oil tank, and the outlet end of the mechanical pump control circuit is connected to the main oil pressure regulating oil circuit; a cooling flow regulating circuit, wherein the oil inlet of the cooling flow regulating circuit is connected to the main oil pressure regulating oil circuit, and the oil outlet of the cooling flow regulating circuit is connected to the cooling lubricating oil circuit; a first solenoid valve, wherein an oil inlet of the first solenoid valve is connected to the main oil pressure regulating oil circuit, and an oil outlet of the first solenoid valve is connected to a control end of the first regulating valve; a parking control circuit, wherein the oil inlet of the parking control circuit is connected to the main oil pressure regulating oil circuit, and the control end of the parking control circuit is connected to the oil outlet of the first solenoid valve; the oil pressure at the oil outlet of the first solenoid valve is used to control the opening state of the parking control circuit and the first regulating valve, and the opening oil pressure of the parking control circuit is lower than the opening oil pressure of the first regulating valve; a second solenoid valve, wherein the oil inlet of the second solenoid valve is connected to the main oil pressure regulating oil circuit; a clutch control circuit, wherein the oil inlet of the clutch control circuit is connected to the main oil pressure regulating oil circuit, and the control end of the clutch control circuit is connected to the oil outlet of the second solenoid valve; The electronic pump control circuit includes: an electronic pump, wherein an inlet end of the electronic pump is connected to the oil tank; a second regulating valve, wherein the oil inlet of the second regulating valve is connected to the outlet end of the electronic pump, and the oil outlet of the second regulating valve is connected to the main oil pressure regulating oil circuit; a third regulating valve, wherein the oil inlet of the third regulating valve is connected to the outlet end of the electronic pump, and the oil outlet of the third regulating valve is connected to the oil inlet of the first regulating valve; Wherein, the operating speed of the electronic pump is decoupled from the engine speed and the transmission speed; The mechanical pump control circuit includes: a mechanical pump, wherein an inlet end of the mechanical pump is connected to the oil tank; a fourth regulating valve, wherein the oil inlet of the fourth regulating valve is connected to the outlet end of the mechanical pump, and the oil outlet of the fourth regulating valve is connected to the main oil pressure regulating oil circuit; The operating speed of the mechanical pump is coupled to the engine speed, the transmission speed, or the drive motor speed.

2. The hybrid hydraulic control system according to claim 1, characterized in that: The cooling flow regulating circuit includes: a third solenoid valve, wherein the oil inlet of the third solenoid valve is connected to the main oil pressure regulating oil circuit; The fifth regulating valve, the first control end of the fifth regulating valve is connected to the oil outlet of the third solenoid valve, the second control end of the fifth regulating valve is connected to the main oil pressure regulating oil circuit, the oil inlet of the fifth regulating valve is connected to the main oil pressure regulating oil circuit, the first oil outlet of the fifth regulating valve is connected to the cooling and lubricating oil circuit through the damping hole, and the second oil outlet of the fifth regulating valve is connected to the inlet end of the mechanical pump.

3. The hybrid hydraulic control system according to claim 1, characterized in that: The parking control circuit includes: a sixth regulating valve, wherein a control end of the sixth regulating valve is connected to the oil outlet of the first solenoid valve, and an oil inlet of the sixth regulating valve is connected to the main oil pressure regulating oil circuit; The parking piston is connected to the first oil outlet of the sixth regulating valve, and the second oil outlet of the sixth regulating valve is connected to the oil tank.

4. The hybrid hydraulic control system according to claim 1, characterized in that: The clutch control circuit includes: a seventh regulating valve, wherein a first control end of the seventh regulating valve is connected to the oil outlet of the second solenoid valve, and an oil inlet of the seventh regulating valve is connected to the main oil pressure regulating oil circuit; a clutch piston connected to the first oil outlet of the seventh regulating valve via a clutch pressure control oil circuit, a second oil outlet of the seventh regulating valve being connected to the oil tank, and the clutch pressure control oil circuit being further connected to the second control end of the seventh regulating valve; The oil pressure sensor is used to detect the oil pressure of the clutch pressure control oil circuit.

5. The hybrid hydraulic control system according to claim 1, characterized in that: The oil tank is connected to the inlet end of the electronic pump control circuit and the inlet end of the mechanical pump control circuit respectively through a first filter; the main oil pressure regulating oil circuit is connected to the oil inlet of the second solenoid valve through a second filter.

6. A hybrid hydraulic control method, characterized in that: Applied to the hybrid hydraulic control system according to any one of claims 1 to 5, the method comprises: When the mechanical pump control circuit is not operating or is operating at a speed lower than a first preset speed, the first regulating valve is closed, and the flow of the electronic pump control circuit is output to the main oil pressure regulating oil circuit through the first output channel; The cooling flow regulating circuit regulates the main oil pressure of the main oil pressure regulating oil circuit and the cooling flow of the cooling lubricating oil circuit; Controlling the current of the first solenoid valve by the main oil pressure so that the oil pressure at the oil outlet of the first solenoid valve is between the opening pressure of the parking control circuit and the opening pressure of the first regulating valve, so that the parking control circuit is opened and the first regulating valve is closed; The current of the second solenoid valve is controlled by the main oil pressure so that the oil pressure of the clutch pressure control oil circuit meets the clutch torque capacity requirement.

7. The hybrid hydraulic control method according to claim 6, characterized in that: The method further comprises: When the mechanical pump control circuit operates at a speed higher than the first preset speed and lower than the second preset speed, the first regulating valve opens, and the flow of the electronic pump control circuit is output to the cooling lubricating oil circuit through the second output channel; Regulating the main oil pressure of the main oil pressure regulating oil circuit and the cooling flow of the cooling lubricating oil circuit by the cooling flow regulating circuit; Controlling the current of the first solenoid valve by the main oil pressure so that the oil pressure at the oil outlet of the first solenoid valve is greater than the opening pressure of the parking control circuit and the first regulating valve, so that both the parking control circuit and the first regulating valve are opened; The current of the second solenoid valve is controlled by the main oil pressure so that the oil pressure of the clutch pressure control oil circuit meets the clutch torque capacity requirement.

8. The hybrid hydraulic control method according to claim 6, characterized in that: The method further comprises: When the mechanical pump control circuit operates at a speed higher than a second preset speed, the flow of the mechanical pump control circuit is output to the main oil pressure regulating oil circuit, the electronic pump control circuit stops operating, and the first regulating valve is closed; Regulating the main oil pressure of the main oil pressure regulating oil circuit and the cooling flow of the cooling lubricating oil circuit by the cooling flow regulating circuit; Controlling the current of the first solenoid valve by the main oil pressure so that the oil pressure at the oil outlet of the first solenoid valve is between the opening pressure of the parking control circuit and the opening pressure of the first regulating valve, so that the parking control circuit is opened and the first regulating valve is closed; The current of the second solenoid valve is controlled by the main oil pressure so that the oil pressure of the clutch pressure control oil circuit meets the clutch torque capacity requirement.

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