Two-execution-element hydraulic system with interlocking function

Abstract

The invention belongs to the technical field of vehicle transmission, and particularly relates to a two-executive-element hydraulic system with an interlocking function, which comprises an oil supply system, a hydraulic control system and an interlocking device, the number of the clutches is two, one clutch is communicated with the oil supply system through a first clutch control valve, the other clutch is communicated with the oil supply system through a second clutch control valve, and the first clutch control valve and the second clutch control valve are used for controlling the combination state of the corresponding clutches; an interlocking valve is communicated between the first clutch control valve and the second clutch control valve, and 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. According to the device, the interlocking valve is arranged, when hydraulic oil enters the second clutch control valve, part of the hydraulic oil is shunted into the interlocking valve, the interlocking valve is driven to act to cut off a passage between the oil supply system and the first clutch control valve, and then mechanical interference is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle transmission, and in particular relates to a two-actuator hydraulic system with an interlocking function. Background Art

[0002] In a two-speed automatic transmission, the engagement and disengagement of the clutches can be controlled separately by configuring a hydraulic control system for two clutches. In actual working conditions, only one of the two clutches should be in the engaged state. If both clutches are in the engaged state, mechanical interference will occur. In traditional technology, solenoid valves are configured in the corresponding hydraulic pipelines, and the two clutches are controlled separately by controlling the on and off of the solenoid valves. However, the numerical control method has a potential risk of failure. Therefore, a two-actuator hydraulic system with an interlocking function is urgently needed to solve the above problem. Summary of the invention

[0003] The object of the present invention is to provide a two-actuator hydraulic system with an interlocking function to solve the above-mentioned problem.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] A two-actuator hydraulic system with an interlocking function, comprising:

[0006] Oil supply system, used to provide hydraulic pressure;

[0007] A clutch, wherein two clutches are provided, wherein one of the clutches is connected to the oil supply system via a first clutch control valve, and the other clutch is connected to the oil supply system via a second clutch control valve, wherein the first clutch control valve and the second clutch control valve are used to control the engagement state of the corresponding clutch;

[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 communication between the first clutch control valve and 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 through a first branch, and the first pilot solenoid valve is connected to the oil supply system through;

[0010] The interlocking valve is arranged in the middle of the first branch, and the interlocking valve is used to control the on and off of the first branch.

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

[0012] The interlocking valve is arranged in parallel in the middle of the second branch through 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 part is used to provide 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 adjust 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 driving 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 the pressure reducing valve is connected to the main oil circuit, and the other end of the pressure reducing valve is arranged in parallel on 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 is connected in parallel with one end of a third pilot solenoid valve, and the other end of the third pilot solenoid valve is communicated with the main pressure valve.

[0024] Optionally, the oil supply unit includes a hydraulic oil tank and a hydraulic oil pump, and an oil outlet end 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] When in use, the oil supply system is started to provide hydraulic pressure to drive the clutch to operate. The first clutch control valve and the second clutch control valve respectively control the opening and closing of the corresponding clutch and the oil supply system oil circuit. When the first clutch control valve or the second clutch control valve is opened, the hydraulic oil drives the clutch to engage. When the first clutch control valve or the second clutch control valve is closed, the clutch is separated due to lack of oil pressure. In actual working conditions, since only one of the two clutches is in the engaged state, by setting an interlock valve, when a fault occurs, the first clutch control valve and the second clutch control valve are both in the open state, and when the hydraulic oil enters the second clutch control valve to open it, part of the hydraulic oil is diverted to the interlock valve, driving the interlock valve to cut off the passage between the oil supply system and the first clutch control valve, so that the first clutch control valve is naturally closed in the state of lack of oil pressure, and the oil supply to the clutch connected to the first clutch control valve is stopped, thereby ensuring that only one clutch is in the engaged state to avoid mechanical interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0028] Figure 1 It 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 DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

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

[0033] Oil supply system, used to provide hydraulic pressure;

[0034] Clutch: There are 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;

[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 being connected to the oil supply system when the second clutch control valve 3 is connected to the oil supply system.

[0036] When in use, the oil supply system is started to provide hydraulic pressure to drive the clutch to operate. The first clutch control valve 2 and the second clutch control valve 3 respectively control the opening and closing of the corresponding clutch and the oil supply system oil circuit. When the first clutch control valve 2 or the second clutch control valve 3 is opened, 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 is separated due to lack of oil pressure. In actual working conditions, since only one of the two clutches is in the engaged state, by setting the interlock valve 4, when a fault occurs, the first clutch control valve 2 and the second clutch control valve 3 are both in the open state, and when the hydraulic oil enters the second clutch control valve 3 to open it, part of the hydraulic oil is diverted to the interlock valve 4, driving the interlock valve 4 to cut off the passage between the oil supply system and the first clutch control valve 2, so that the first clutch control valve 2 is naturally closed in the state of lack of oil pressure, and the oil supply to the clutch connected to the first clutch control valve 2 is stopped, thereby ensuring that only one clutch is in the engaged state to avoid mechanical interference.

[0037] As an optional implementation, 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;

[0038] The interlocking valve 4 is arranged in the middle of the first branch, and the interlocking valve 4 is used to control the on-off of the first branch.

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

[0040] The interlocking valve 4 is arranged in parallel in the middle of the second branch through 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 part is used to provide hydraulic oil and is connected with the main oil circuit;

[0044] The main pressure valve 1 is connected to the main oil circuit and is used to adjust 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 oil pressure regulating driving unit is used to drive the main pressure valve 1 to adjust 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 the interlock valve 4 , the first pilot solenoid valve 6 and the second pilot solenoid valve 7 .

[0049] As an optional embodiment, the oil pressure regulating driving 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 arranged in parallel on the control oil circuit;

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

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

[0052] As an optional implementation, 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.

[0053] The device is composed 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 pressure valve 1, the pressure reducing valve 5 and the third pilot solenoid valve 8 constitute the main oil circuit oil pressure control circuit, and the third pilot solenoid valve 8 realizes stepless regulation of the main oil circuit pressure. The first clutch control valve 2, the second clutch control valve 3, the interlocking valve 4, the first pilot solenoid valve 6 and the second pilot solenoid valve 7 constitute the clutch control circuit to realize the control of the pressure of the two clutches.

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

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

[0057] When the device is in operation, oil is supplied to the main oil circuit through the oil pump, and the oil outlet pressure of the main oil circuit is adjusted through the main pressure valve 1. The hydraulic oil in the main oil circuit is divided, and a part of it enters the control oil circuit through the pressure reducing valve 5. The hydraulic oil in the control oil circuit is divided and enters the third pilot solenoid valve 8. The opening size of the third pilot solenoid valve 8 is adjusted to act on the oil pressure in the main pressure valve 1. The 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, a balanced oil pressure is generated by the main oil circuit diversion to maintain the piston position. When the piston moves, the size of the upper oil drain port of the main pressure valve 1 is adjusted, and then the oil pressure in the main oil circuit is regulated by diverting the oil pressure in the main oil circuit.

[0058] The oil 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 respectively. The principle is as follows: the hydraulic oil entering the control oil circuit through the pressure reducing valve 5 is divided into 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 an open state and the other is in a closed state. When the first pilot solenoid valve 6 or the second pilot solenoid valve 7 is opened, the oil pressure acts on the corresponding first clutch control valve 2 or the second clutch control valve 3 to open it, so that the corresponding clutch is connected to the main oil circuit to realize clutch engagement. Under normal working conditions, only one of the first pilot solenoid valve 6 and the second pilot solenoid valve 7 is in an open state. One is in the open state and the other is in the closed state. When a problem occurs, that is, the first pilot solenoid valve 6 and the second pilot solenoid valve 7 are both 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 pushes its piston to return under the action of the spring due to lack of oil pressure, automatically closing the first clutch control valve 2 to avoid the two clutches being in the engaged state 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 open it after the system is restored. Each valve body returns the hydraulic oil to the oil tank through the return oil pipeline.

[0059] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, 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, and therefore should not be understood as a limitation on the present invention.

[0060] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A two-actuator hydraulic system with an interlocking function, comprising: Oil supply system, used to provide hydraulic pressure; A clutch, wherein two clutches are provided, one of the clutches is connected to the oil supply system via a first clutch control valve (2), and the other clutch is connected to the oil supply system via a second clutch control valve (3), and 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 invention is characterized in that an interlocking valve (4) is connected between the first clutch control valve (2) and the second clutch control valve (3), and the interlocking valve (4) is used to block the connection between the first clutch control valve (2) and the oil supply system when the second clutch control valve (3) is connected to the oil supply system.

2. A two-actuator hydraulic system with interlocking function according to claim 1, characterized in that: 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; The interlocking valve (4) is arranged in communication with the middle of the first branch, and the interlocking valve (4) is used to control the on-off of the first branch.

3. A two-actuator hydraulic system with interlocking function according to claim 2, characterized in that: 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; The interlocking valve (4) is arranged in parallel in the middle of the second branch through a 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).

4. A two-actuator hydraulic system with interlocking function according to claim 3, characterized in that: The oil supply system comprises 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 part is used to provide hydraulic oil and is connected to the main oil circuit; The main pressure valve (1) is in communication with the main oil circuit, and the main pressure valve (1) is used to adjust 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 driving 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).

5. A two-actuator hydraulic system with interlocking function according to claim 4, characterized in that: The oil pressure regulating driving unit comprises a pressure reducing valve (5), one end of the pressure reducing valve (5) is communicated with the main oil circuit, and the other end of the pressure reducing valve (5) is arranged in parallel with the control oil circuit; The control oil circuit is connected to the interlocking valve (4) via a fourth parallel branch; One end of a third pilot solenoid valve (8) is connected in parallel to the control oil circuit, and the other end of the third pilot solenoid valve (8) is connected to the main pressure valve (1).

6. A two-actuator hydraulic system with interlocking function according to claim 4, characterized in that: The oil supply unit includes a hydraulic oil tank and a hydraulic oil pump, and an oil outlet end of the hydraulic oil pump is communicated with the main oil circuit.

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