Hydraulic system with two actuating elements with interlocking function

Abstract

The present application belongs to the field of vehicle transmission technology, and particularly relates to a two-execution-element hydraulic system with interlocking function, comprising: an oil supply system for providing hydraulic pressure; clutches, the clutches are provided with two, one of the clutches is communicated with the oil supply system through a first clutch control valve, and the other clutch is communicated with the oil supply system through a second clutch control valve, the first clutch control valve and the second clutch control valve are used for controlling the combination state of the corresponding clutch; a interlocking valve is communicated between the first clutch control valve and the second clutch control valve, and the interlocking valve is used for blocking the communication between the first clutch control valve and the oil supply system when the second clutch control valve is communicated with the oil supply system. The device sets the interlocking valve, part of the hydraulic oil is shunted into the interlocking valve when the hydraulic oil enters the second clutch control valve, the interlocking valve is driven to act to cut off the passage between the oil supply system and the first clutch control valve, and then mechanical interference is avoided.

Description

Technical Field

[0001] This invention belongs to the field of vehicle transmission technology, and particularly relates to a hydraulic system with two actuators having an interlocking function. Background Technology

[0002] In a two-speed automatic transmission, the engagement and disengagement of the clutches can be controlled separately by a hydraulic control system with two clutches. However, in actual operation, only one of the two clutches should be engaged. If both clutches are engaged, mechanical interference will occur. In traditional technology, solenoid valves are configured in the corresponding hydraulic lines, and the two clutches are controlled separately by controlling the opening and closing of the solenoid valves. However, the CNC method has potential failure risks. Therefore, there is an urgent need for a hydraulic system with two actuators and interlocking function to solve the above problems. Summary of the Invention

[0003] The purpose of this invention is to provide a two-actuator hydraulic system with interlocking function to solve the above-mentioned problems.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] A two-actuator hydraulic system with interlocking function includes:

[0006] The oil supply system is used to provide hydraulic pressure.

[0007] The clutch has two clutches, one of which is connected to the oil supply system through a first clutch control valve, and the other clutch is connected to the oil supply system through a second clutch control valve. The first clutch control valve and the second clutch control valve are used to control the engagement state of the corresponding clutches.

[0008] An interlock valve is connected between the first clutch control valve and the second clutch control valve. The interlock valve is used to block the first clutch control valve from connecting to the oil supply system when the second clutch control valve is connected to the oil supply system.

[0009] Optionally, the first clutch control valve is connected to a first pilot solenoid valve via a first branch, and the first pilot solenoid valve is connected to the oil supply system.

[0010] The interlock valve is connected and installed in the middle of the first branch, and the interlock valve is used to control the opening and closing of the first branch.

[0011] Optionally, the second clutch control valve is connected to a second pilot solenoid valve via a second branch, and the second pilot solenoid valve is connected to the oil supply system;

[0012] The interlock valve is connected in parallel to the middle of the second branch via the third branch;

[0013] The second pilot solenoid valve is used to control the opening and closing of the interlock valve and the second clutch control valve.

[0014] Optionally, the oil supply system includes an oil supply unit, a main pressure valve, an oil pressure regulating drive unit, a main oil circuit, and a control oil circuit;

[0015] The oil supply unit is used to supply hydraulic oil and is connected to the main oil circuit;

[0016] The main pressure valve is connected to the main oil circuit, and the main pressure valve is used to regulate the oil pressure in the main oil circuit;

[0017] The main oil circuit is connected in parallel with the first clutch control valve, the second clutch control valve and the oil pressure regulating drive unit;

[0018] The oil pressure regulating drive unit is used to drive the main pressure valve to regulate the oil supply pressure in the main oil circuit;

[0019] The control oil circuit is connected to the main oil circuit through the oil pressure regulating drive unit;

[0020] The control oil circuit is connected in parallel with the interlock valve, the first pilot solenoid valve, and the second pilot solenoid valve.

[0021] Optionally, the oil pressure regulating drive unit includes a pressure reducing valve, one end of which is connected to the main oil circuit, and the other end of which is connected in parallel to the control oil circuit;

[0022] The control oil circuit is connected to the interlock valve via a fourth parallel branch;

[0023] The control oil circuit has one end of a third pilot solenoid valve connected in parallel, and the other end of the third pilot solenoid valve is connected to the main pressure valve.

[0024] Optionally, the oil supply unit includes a hydraulic oil tank and a hydraulic oil pump, and the oil outlet of the hydraulic oil pump is connected to the main oil circuit.

[0025] Compared with the prior art, the present invention has the following advantages and technical effects:

[0026] In operation, the oil supply system is activated to provide hydraulic pressure to drive the clutches. The first and second clutch control valves control the connection and disconnection of the corresponding clutches with the oil supply system. When either the first or second clutch control valve is open, the hydraulic oil drives the clutches to engage. When either the first or second clutch control valve is closed, the clutches disengage due to lack of oil pressure. In actual operation, since only one of the two clutches is engaged, an interlock valve is installed. In the event of a malfunction, both the first and second clutch control valves are open. When the hydraulic oil enters the second clutch control valve to open it, some hydraulic oil is diverted to the interlock valve, which then cuts off the connection between the oil supply system and the first clutch control valve. This allows the first clutch control valve to close naturally when there is a lack of oil pressure, stopping the oil supply to the clutches connected to the first clutch control valve. This ensures that only one clutch is engaged, preventing mechanical interference. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of the present invention;

[0029] Among them, 1. main pressure valve; 2. first clutch control valve; 3. second clutch control valve; 4. interlock valve; 5. pressure reducing valve; 6. first pilot solenoid valve; 7. second pilot solenoid valve; 8. third pilot solenoid valve. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Reference Figure 1 This invention discloses a two-actuator hydraulic system with interlocking function, comprising:

[0033] The oil supply system is used to provide hydraulic pressure.

[0034] The clutch has two clutches. One clutch is connected to the oil supply system through the first clutch control valve 2, and the other clutch is connected to the oil supply system through the second clutch control valve 3. The first clutch control valve 2 and the second clutch control valve 3 are used to control the engagement state of the corresponding clutches.

[0035] An interlock valve 4 is connected between the first clutch control valve 2 and the second clutch control valve 3. The interlock valve 4 is used to block the first clutch control valve 2 from connecting to the oil supply system when the second clutch control valve 3 is connected to the oil supply system.

[0036] In use, the oil supply system is activated to provide hydraulic pressure to drive the clutch. The first clutch control valve 2 and the second clutch control valve 3 control the connection and disconnection of the corresponding clutch with the oil supply system. When the first clutch control valve 2 or the second clutch control valve 3 is open, the hydraulic oil drives the clutch to engage. When the first clutch control valve 2 or the second clutch control valve 3 is closed, the clutch disengages due to lack of oil pressure. In actual operation, since only one of the two clutches is engaged, an interlock valve 4 is installed. In the event of a malfunction, both the first clutch control valve 2 and the second clutch control valve 3 are open. When the hydraulic oil enters the second clutch control valve 3 to open it, some hydraulic oil is diverted to the interlock valve 4, which drives the interlock valve 4 to cut off the passage between the oil supply system and the first clutch control valve 2. This allows the first clutch control valve 2 to close naturally when there is a lack of oil pressure, stopping the oil supply to the clutch connected to the first clutch control valve 2, thus ensuring that only one clutch is engaged and avoiding mechanical interference.

[0037] As an optional implementation, the first clutch control valve 2 is connected to a first pilot solenoid valve 6 via a first branch, and the first pilot solenoid valve 6 is connected to the oil supply system.

[0038] Interlock valve 4 is connected and installed in the middle of the first branch. Interlock valve 4 is used to control the on / off state of the first branch.

[0039] As an optional implementation, the second clutch control valve 3 is connected to a second pilot solenoid valve 7 via a second branch, and the second pilot solenoid valve 7 is connected to the oil supply system.

[0040] Interlock valve 4 is connected in parallel to the middle of the second branch via the third branch;

[0041] The second pilot solenoid valve 7 is used to control the opening and closing of the interlock valve 4 and the second clutch control valve 3.

[0042] As an optional implementation, the oil supply system includes an oil supply unit, a main pressure valve 1, an oil pressure regulating drive unit, a main oil circuit, and a control oil circuit;

[0043] The oil supply unit is used to supply hydraulic oil and is connected to the main oil circuit;

[0044] Main pressure valve 1 is connected to the main oil circuit and is used to regulate the oil pressure in the main oil circuit.

[0045] The main oil circuit is connected in parallel with the first clutch control valve 2, the second clutch control valve 3, and the oil pressure regulating drive unit;

[0046] The hydraulic pressure regulating drive unit is used to drive the main pressure valve 1 to regulate the oil supply pressure in the main oil circuit;

[0047] The control oil circuit is connected to the main oil circuit through the oil pressure regulating drive unit;

[0048] The control oil circuit is connected in parallel with interlock valve 4, first pilot solenoid valve 6 and second pilot solenoid valve 7.

[0049] As an optional implementation, the oil pressure regulating drive unit includes a pressure reducing valve 5, one end of which is connected to the main oil circuit, and the other end of which is connected in parallel to the control oil circuit.

[0050] The control oil circuit is connected to interlock valve 4 via a parallel fourth branch;

[0051] One end of the control oil circuit is connected in parallel with the third pilot solenoid valve 8, and the other end of the third pilot solenoid valve 8 is connected to the main pressure valve 1.

[0052] As an optional implementation, the oil supply unit includes a hydraulic oil tank and a hydraulic oil pump, with the oil outlet of the hydraulic oil pump connected to the main oil circuit.

[0053] This device consists of a first pilot solenoid valve 6, a second pilot solenoid valve 7, a third pilot solenoid valve 8, a main pressure valve 1, a first clutch control valve 2, a second clutch control valve 3, an interlock valve 4, and a pressure reducing valve 5, and includes a main oil circuit and a control oil circuit.

[0054] The main oil circuit pressure control loop consists of the main pressure valve 1, the pressure reducing valve 5, and the third pilot solenoid valve 8, which enables stepless adjustment of the main oil circuit pressure. The clutch control loop consists of the first clutch control valve 2, the second clutch control valve 3, the interlock valve 4, the first pilot solenoid valve 6, and the second pilot solenoid valve 7, which controls the pressure of the two clutches.

[0055] The overflow circuit of the main pressure valve 1 forms a cooling and lubrication circuit, and the overflow flow goes directly to the cooling and lubrication after passing through the radiator.

[0056] The working principle of this invention is as follows:

[0057] When this device is running, oil is supplied to the main oil circuit by an oil pump, and the oil outlet pressure of the main oil circuit is regulated by the main pressure valve 1. The hydraulic oil in the main oil circuit is diverted, and a portion of it enters the control oil circuit through the pressure reducing valve 5. The hydraulic oil in the control oil circuit is diverted to the third pilot solenoid valve 8. The opening of the third pilot solenoid valve 8 is adjusted to control the oil pressure in the main pressure valve 1. This oil pressure is used to cooperate with the spring in the main pressure valve 1 to push the piston to move. At the other end of the piston, the main oil circuit diversion generates a balancing oil pressure to maintain the piston position. When the piston moves, it will adjust the size of the oil drain port of the main pressure valve 1, thereby achieving oil pressure regulation in the main oil circuit by diverting the oil pressure in the main oil circuit.

[0058] The hydraulic pressure in the main oil circuit acts on the corresponding clutches through the first clutch control valve 2 and the second clutch control valve 3. The principle is as follows: hydraulic oil entering the control oil circuit through the pressure reducing valve 5 is diverted to the first pilot solenoid valve 6 and the second pilot solenoid valve 7. One of the first pilot solenoid valve 6 and the second pilot solenoid valve 7 is in the open state, and the other is in the closed state. When the first pilot solenoid valve 6 or the second pilot solenoid valve 7 is open, the hydraulic pressure acts on the corresponding first clutch control valve 2 or the second clutch control valve 3, causing it to open and connecting the corresponding clutch to the main oil circuit, thus achieving clutch engagement. Under normal operating conditions, only one of the first pilot solenoid valve 6 and the second pilot solenoid valve 7 is open. One valve is in the open state, and the other is in the closed state. When a problem occurs, i.e., both the first pilot solenoid valve 6 and the second pilot solenoid valve 7 are in the open state, the hydraulic oil in the control oil circuit is diverted to the interlock valve 4, pushing the piston of the interlock valve 4 to move, blocking the oil circuit between the first clutch control valve 2 and the first pilot solenoid valve 6. Due to the lack of oil pressure, the piston of the first clutch control valve 2 is pushed back to its original position under the action of the spring, automatically closing the first clutch control valve 2 and preventing both clutches from being engaged at the same time. The end of the interlock valve 4 away from the second pilot solenoid valve 7 is connected to the control oil circuit through the fourth oil circuit, which is used to push the piston in the interlock valve 4 to overcome the spring action and put it in the open state after the system is restored. The hydraulic oil in each valve body returns to the oil tank through the return oil line.

[0059] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0060] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A two-actuator hydraulic system with interlocking function, comprising: The oil supply system is used to provide hydraulic pressure; The clutch has two clutches, one of which is connected to the oil supply system through a first clutch control valve (2), and the other clutch is connected to the oil supply system through a second clutch control valve (3). The first clutch control valve (2) and the second clutch control valve (3) are used to control the engagement state of the corresponding clutches. The first clutch control valve (2) and the second clutch control valve (3) are connected by an interlock valve (4), which is used to block the first clutch control valve (2) from connecting to the oil supply system when the second clutch control valve (3) is connected to the oil supply system. The first clutch control valve (2) is connected to the first pilot solenoid valve (6) through the first branch, and the first pilot solenoid valve (6) is connected to the oil supply system; The interlock valve (4) is connected and installed in the middle of the first branch, and the interlock valve (4) is used to control the opening and closing of the first branch; The second clutch control valve (3) is connected to the second pilot solenoid valve (7) through the second branch, and the second pilot solenoid valve (7) is connected to the oil supply system; The interlock valve (4) is connected in parallel to the middle of the second branch via the third branch; The second pilot solenoid valve (7) is used to control the opening and closing of the interlock valve (4) and the second clutch control valve (3); The oil supply system includes an oil supply unit, a main pressure valve (1), an oil pressure regulating drive unit, a main oil circuit, and a control oil circuit; The oil supply unit is used to supply hydraulic oil and is connected to the main oil circuit; The main pressure valve (1) is connected to the main oil circuit, and the main pressure valve (1) is used to regulate the oil pressure in the main oil circuit; The main oil circuit is connected in parallel with the first clutch control valve (2), the second clutch control valve (3) and the oil pressure regulating drive unit; The oil pressure regulating drive unit is used to drive the main pressure valve (1) to regulate the oil supply pressure in the main oil circuit; The control oil circuit is connected to the main oil circuit through the oil pressure regulating drive unit; The control oil circuit is connected in parallel with the interlock valve (4), the first pilot solenoid valve (6) and the second pilot solenoid valve (7); the oil pressure regulating drive unit includes a pressure reducing valve (5), one end of the pressure reducing valve (5) is connected to the main oil circuit, and the other end of the pressure reducing valve (5) is connected in parallel to the control oil circuit; The control oil circuit is connected to the interlock valve (4) via a fourth parallel branch; The control oil circuit has one end of a third pilot solenoid valve (8) connected in parallel, and the other end of the third pilot solenoid valve (8) is connected to the main pressure valve (1); Hydraulic oil entering the control circuit through the pressure reducing valve (5) is diverted to the first pilot solenoid valve (6) and the second pilot solenoid valve (7). One of the first pilot solenoid valve (6) and the second pilot solenoid valve (7) is open, and the other is closed. When the first pilot solenoid valve (6) or the second pilot solenoid valve (7) is open, the oil pressure acts on the corresponding first clutch control valve (2) or second clutch control valve (3) to open it, so that the corresponding clutch is connected to the main oil circuit and the clutch is engaged. Under normal working conditions, only one of the first pilot solenoid valve (6) and the second pilot solenoid valve (7) is open and the other is closed. When a problem occurs, i.e., the first pilot solenoid valve (6) and the second pilot solenoid valve (7) are closed, the hydraulic oil is diverted to the first pilot solenoid valve (6) and the second pilot solenoid valve (7) to the control circuit. When a problem occurs, i.e., the first pilot solenoid valve (6) and the second pilot solenoid valve (7) are closed, the hydraulic oil is diverted to the first pilot solenoid valve (6) and the second pilot solenoid valve (7) to the control circuit. Both the first pilot solenoid valve (6) and the second pilot solenoid valve (7) are in the open state. At this time, the hydraulic oil in the control oil circuit is diverted to the interlock valve (4), pushing the piston of the interlock valve (4) to move, blocking the oil circuit between the first clutch control valve (2) and the first pilot solenoid valve (6). The first clutch control valve (2) lacks oil pressure, pushing its piston to return to its original position under the action of the spring, automatically closing the first clutch control valve (2), avoiding the two clutches from being engaged at the same time. The end of the interlock valve (4) away from the second pilot solenoid valve (7) is connected to the control oil circuit through the fourth oil circuit, which is used to push the piston in the interlock valve (4) to overcome the spring action and put it in the open state after the system is restored.

2. A hydraulic system with two actuators and interlocking function according to claim 1, characterized in that: The oil supply unit includes a hydraulic oil tank and a hydraulic oil pump, and the oil outlet of the hydraulic oil pump is connected to the main oil circuit.

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