CN217081182U - Hydraulic system of hybrid transmission - Google Patents
Hydraulic system of hybrid transmission Download PDFInfo
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- CN217081182U CN217081182U CN202220976343.1U CN202220976343U CN217081182U CN 217081182 U CN217081182 U CN 217081182U CN 202220976343 U CN202220976343 U CN 202220976343U CN 217081182 U CN217081182 U CN 217081182U
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- 230000005540 biological transmission Effects 0.000 title claims description 25
- 238000001816 cooling Methods 0.000 claims abstract description 75
- 230000001105 regulatory effect Effects 0.000 claims description 41
- 230000008901 benefit Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
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Abstract
The utility model discloses a mix and move derailleur hydraulic system, including first hydraulic pump, the second hydraulic pump, the cooling oil circuit with first hydraulic pump connection, the main pressure-regulating valve of being connected with the second hydraulic pump, the generator cooling control valve of being connected with the main pressure-regulating valve, be connected with the second hydraulic pump and be used for carrying pressure oil to the clutch's clutch pressure control oil circuit and the ooff valve of being connected with clutch pressure control oil circuit and main pressure-regulating valve, clutch pressure control oil circuit is connected with the main pressure-regulating valve through the guide's oil circuit, the ooff valve is connected with control valve guide's oil circuit.
Description
Technical Field
The utility model belongs to the technical field of the gearbox, specifically speaking, the utility model relates to a mix variable-speed transmission hydraulic system.
Background
In the prior art, the pressure regulating valve is arranged in the hybrid electric vehicle system to control and regulate pressure, the cleanliness requirements on the valve body and the transmission assembly are high, the clamping stagnation condition is easy to occur, and the reliability is poor.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a mix and move derailleur hydraulic system, the purpose is the reliability that improves.
In order to realize the purpose, the utility model discloses the technical scheme who takes does: the hydraulic system of the hybrid transmission comprises a first hydraulic pump, a second hydraulic pump, a cooling oil path connected with the first hydraulic pump, a main pressure regulating valve connected with the second hydraulic pump, a generator cooling control valve connected with the main pressure regulating valve, a clutch pressure control oil path connected with the second hydraulic pump and used for conveying pressure oil to a clutch, and a switch valve connected with the clutch pressure control oil path and the main pressure regulating valve, wherein the clutch pressure control oil path is connected with the main pressure regulating valve through a pilot oil path, and the switch valve is connected with a pilot oil path of a control valve.
The clutch pressure control oil path comprises a clutch pressure control valve, and the clutch pressure control valve is connected with the pilot oil path.
The output end of the switch valve is connected with the spring side of the main pressure regulating valve and the pilot side of the clutch pressure control valve through the pilot oil way, and when the switch valve is opened, the pressure of the main oil way is boosted, and meanwhile, the valve core of the clutch pressure control valve is pushed to move.
A first orifice is provided in the pilot oil passage, and the first orifice is located between the on-off valve and the clutch pressure control valve.
A second orifice is provided in the pilot oil passage, and the second orifice is located between the on-off valve and the main pressure regulating valve.
The cooling oil path is connected with the clutch and the driving motor, the cooling oil path comprises a first one-way valve and an oil cooler, and the generator cooling control valve is connected with the oil cooler.
The cooling oil circuit further comprises a cooling pressure control valve, and the cooling pressure control valve is connected with the oil tank, the oil cooler and the main pressure regulating valve.
The clutch pressure control valve is connected with an energy accumulator, and the energy accumulator is connected with the clutch.
The working pressure range of the energy accumulator is 1-9Bar, and the initial working pressure of the energy accumulator is greater than the pressure of a KP point of the clutch.
The first hydraulic pump is connected with the differential mechanism, and the second hydraulic pump is connected with an output shaft of the engine.
The hydraulic system of the hybrid transmission of the utility model controls the pressure through the switch valve and a series of slide valves, has higher tolerance to pollutants and higher reliability; and only one switching solenoid valve is adopted for control, the control of the flow and the pressure of the single-gear DHT transmission under various working conditions can be realized, the arrangement is compact, the space is small, the cost advantage is obvious, and the occupied space is reduced.
Drawings
The description includes the following figures, the contents shown are respectively:
FIG. 1 is a schematic diagram of a hydraulic system of a hybrid transmission according to the present invention;
labeled as: 1. a first hydraulic pump; 2. a second hydraulic pump; 3. a main pressure regulating valve; 4. a generator cooling control valve; 5. a clutch pressure control valve; 6. an on-off valve; 7. a pilot oil path; 8. a first orifice; 9. a second orifice; 10. a first check valve; 11. a second one-way valve; 12. a gear shaft cooling branch; 13. a suction filter; 14. an oil cooler; 15. an accumulator; 16. a pressure sensor; 17. a clutch cooling branch; 18. a drive motor cooling branch; 19. the pressure control valve is cooled.
Detailed Description
The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings, for the purpose of helping those skilled in the art to understand more completely, accurately and deeply the conception and technical solution of the present invention, and to facilitate its implementation.
It should be noted that, in the following embodiments, the terms "first", "second" and "third" do not denote absolute differences in structure and/or function, nor do they denote a sequential order of execution, but rather are used for convenience of description.
As shown in fig. 1, the utility model provides a mix and move derailleur hydraulic system, including first hydraulic pump 1, second hydraulic pump 2, the cooling oil circuit of being connected with first hydraulic pump 1, main pressure-regulating valve 3 of being connected with second hydraulic pump 2, generator cooling control valve 4 of being connected with main pressure-regulating valve 3, clutch pressure control oil circuit and the ooff valve 6 of being connected with clutch pressure control oil circuit and main pressure-regulating valve 3 of being connected and being used for carrying pressure oil to the clutch with second hydraulic pump 2, clutch pressure control oil circuit is connected with main pressure-regulating valve 3 through pilot oil circuit 7, ooff valve 6 is connected with control valve pilot oil circuit 7, generator cooling control valve 4 is connected with the cooling oil circuit.
Specifically, as shown in fig. 1, the first hydraulic pump 1 and the second hydraulic pump 2 are both mechanical pumps, the on-off valve 6 is an electromagnetic valve, the main pressure regulating valve 3 is a spool valve, and the generator cooling control valve 4 is a pilot spool valve. The clutch pressure control oil path comprises a clutch pressure control valve 5, the clutch pressure control valve 5 is connected with a pilot oil path 7, the clutch pressure control valve 5 is a pilot slide valve, and the clutch pressure control valve 5 is provided with a pilot control port, an oil inlet and an oil outlet.
As shown in fig. 1, an oil inlet of the clutch pressure control valve 5 is connected with an oil outlet of the second hydraulic pump 2 through a main oil passage, and an oil outlet of the clutch pressure control valve 5 is connected with a clutch of the hybrid transmission through an oil pipe. The input end of the on-off valve 6 is connected with the main oil passage, and the connection point of the on-off valve 6 and the main oil passage is located between the clutch pressure control valve 5 and the second hydraulic pump 2. A pressure sensor 16 is arranged on an oil pipe connecting the clutch and the clutch pressure control valve 5, and the pressure sensor 16 is used for monitoring oil pressure.
Preferably, the first hydraulic pump 1 is connected to a differential gear on the vehicle, the differential gear drives the first hydraulic pump 1 to operate, and the second hydraulic pump 2 is connected to an output shaft of an engine on the vehicle. When the engine works, the second hydraulic pump 2 can be driven to operate.
As shown in fig. 1, the main pressure regulating valve 3 has a first control port, a second control port, an oil inlet and an oil outlet, the first control port and the oil inlet of the main pressure regulating valve 3 are connected to a main oil path, the second control port of the main pressure regulating valve 3 is connected to a pilot oil path 7, and the oil outlet of the main pressure regulating valve 3 is connected to a cooling oil path. The oil inlet of the main pressure regulating valve 3 is located between the first control port and the second control port, after the oil pressure at the first control port reaches a first opening pressure value of the main pressure regulating valve 3, the valve core of the main pressure regulating valve 3 can be pushed to move towards the second control port, finally, the oil inlet and the oil outlet of the main pressure regulating valve 3 are conducted, and oil from the second hydraulic pump 2 can enter a cooling oil path through the main pressure regulating valve 3.
As shown in fig. 1, the output end of the on-off valve 6 is connected to the second control port of the main regulator valve 3 and the pilot control port of the clutch pressure control valve 5 via a pilot oil passage 7, and when the on-off valve 6 is opened, the main oil passage pressure is boosted and the spool of the clutch pressure control valve 5 is pushed to move. One end of the pilot oil path 7 is connected to the second control port of the main pressure-regulating valve 3, the other end of the pilot oil path 7 is connected to the pilot control port of the clutch pressure control valve 5, the output end of the on-off valve 6 is connected to the pilot oil path 7, and the connection point between the output end of the on-off valve 6 and the pilot oil path 7 is located between the main pressure-regulating valve 3 and the clutch pressure control valve 5. The oil entering the pilot control port of the clutch pressure control valve 5 through the pilot oil passage 7 can push the valve core of the clutch pressure control valve 5 to move, so that the clutch pressure control valve 5 is opened, the oil inlet and the oil outlet of the clutch pressure control valve 5 are communicated, and the oil from the second hydraulic pump 2 can enter the clutch through the clutch pressure control valve 5.
As shown in fig. 1, an oil inlet of the clutch pressure control valve 5 is connected with an oil outlet of the second hydraulic pump 2 through a main oil path, and an oil outlet of the clutch pressure control valve 5 is connected with a clutch of the hybrid transmission through an oil pipe. The input end of the on-off valve 6 is connected with the main oil passage, and the connection point of the on-off valve 6 and the main oil passage is located between the clutch pressure control valve 5 and the second hydraulic pump 2. A pressure sensor 16 is arranged on an oil pipe connecting the clutch and the clutch pressure control valve 5, and the pressure sensor 16 is used for monitoring oil pressure.
As shown in fig. 1, the main pressure regulating valve 3 mainly includes a valve body, a movable valve core disposed inside the valve body, and a spring disposed inside the valve body and applying elastic force to the valve core, the valve body is provided with a first control port pl, a second control port s1, an oil inlet and an oil outlet, a valve cavity for accommodating the valve core and the spring is disposed inside the valve body, the first control port and the second control port are located at two ends of the valve cavity, the valve core is located between the first control port and the second control port, the spring is also located at the second control port, the spring is clamped between the inner wall surface of the valve core and the inner wall surface of the valve body, and the first control port, the second control port, the oil inlet and the oil outlet are communicated with the valve cavity. The area of the end face of the first end of the valve core is larger than that of the end face of the second end, the valve core is of a variable cross-section structure, the first end and the second end of the valve core are two opposite ends of the valve core in the axial direction, the first end of the valve core is close to the first control port, and the second end of the valve core is close to the second control port.
As shown in fig. 1, when the hybrid transmission is in the direct drive mode of the engine, the clutch needs to be in an engaged state, and the pressure required for engaging the clutch is higher, and at this time, the on-off valve 6 needs to be controlled to be opened. When the switch valve 6 is opened, oil enters the second control port of the main pressure regulating valve 3, the oil pressure at the second control port is increased, the oil entering the second control port is contacted with the second end face of the valve core, the force-bearing area of the second end face of the valve core is smaller than that of the first end face, the second end of the valve core is under the combined action of the spring force and the oil pressure, the pressure at the second end of the valve core is increased, the valve core of the main pressure regulating valve 3 moves towards the first control port to close the main pressure regulating valve 3, then the valve core of the main pressure regulating valve 3 gradually moves towards the second control port along with the gradual increase of the oil pressure at the first control port of the main pressure regulating valve 3 until the oil pressure at the first control port reaches the second opening pressure value of the main pressure regulating valve 3, the main pressure regulating valve 3 is completely opened, the pressure of the main oil way is also increased, the oil of the main oil way enters the pilot control port of the clutch pressure control valve 5, and pushing a valve core of the clutch pressure control valve 5 to move so as to open the clutch pressure control valve 5, thereby controlling the clutch to finish corresponding actions, combining the clutch, and then enabling the hybrid transmission to switch the vehicle to the engine direct-drive working condition.
When the on-off valve 6 is in the open state, the main pressure regulating valve 3 can be opened until the oil pressure in the main oil path reaches the second opening pressure value of the main pressure regulating valve 3. In this embodiment, the first opening pressure value of the main pressure regulating valve 3 is 2bar, and the second opening pressure value of the main pressure regulating valve 3 is 7 bar.
As shown in fig. 1, a first orifice 8 is provided in the pilot oil passage 7, and the first orifice 8 is located between the on-off valve 6 and the clutch pressure control valve 5. A second orifice 9 is provided in the pilot oil passage 7, and the second orifice 9 is located between the on-off valve 6 and the main regulator valve 3. The second orifice 9 is closer to the second control port of the main regulator valve 3, and the second orifice 9 is farther from the clutch pressure control valve 5. The diameter of the first orifice 8 is smaller than that of the second control port, the diameter of the second orifice 9 is smaller than that of the pilot control port of the clutch pressure control valve 5, the diameter of the first orifice 8 is 1mm, the diameter of the second orifice 9 is 1mm, and the cooling flow rate is distributed by the orifices.
The generator is driven by the engine, when the hybrid gearbox is in the range extending mode, the engine starts the generator to run, the generator provides electric energy for the driving motor, and the driving motor drives the vehicle to run. As shown in fig. 1, the generator cooling control valve 4 has a pilot control port, an oil inlet and an oil outlet, the oil inlet of the engine cooling control valve is connected to the cooling oil path, and the oil outlet of the engine cooling control valve is connected to the generator. The pilot control port of the generator cooling control valve 4 is connected with the main oil way, the rear end oil way of the second hydraulic pump 2 carries out pilot control on the generator cooling control valve 4, when the second hydraulic pump 2 operates, oil enters the pilot control port of the generator cooling control valve 4 to enable the generator cooling control valve 4 to be opened, the oil inlet and the oil outlet of the generator cooling control valve 4 are communicated, and the oil from the cooling oil way enters the generator through the generator cooling control valve 4 to cool the generator in work.
As shown in fig. 1, a cooling oil path is connected to the clutch and the driving motor, the cooling oil path includes a first check valve 10 and an oil cooler 14, and the generator cooling control valve 4 is connected to the oil cooler 14. An oil inlet of the first check valve 10 is connected with an oil outlet of the first hydraulic pump 1, an oil inlet of the first hydraulic pump 1 is connected with an oil tank, and an oil outlet of the first check valve 10 is connected with an oil inlet of the oil cooler 14. The cooling oil circuit further comprises a generator cooling branch circuit, a clutch cooling branch circuit 17, a driving motor cooling branch circuit 18 and a gear shaft cooling branch circuit 12, an oil outlet of the oil cooler 14 is connected with the generator cooling branch circuit, the clutch cooling branch circuit 17, the driving motor cooling branch circuit 18 and the gear shaft cooling branch circuit 12, the generator cooling branch circuit is used for guiding oil from the oil cooler 14 to the generator cooling control valve 4, the clutch cooling branch circuit 17 is used for guiding the oil from the oil cooler 14 to the clutch, the driving motor cooling branch circuit 18 is used for guiding the oil from the oil cooler 14 to the driving motor, and the gear shaft cooling branch circuit 12 is used for guiding the oil from the oil cooler 14 to the gear shaft. The oil inlet end of the generator cooling branch is connected with the oil cooler 14, and the oil outlet end of the generator cooling branch is connected with the oil inlet of the generator cooling control valve 4. The oil inlet end of the driving motor cooling branch 18 is connected with the oil cooler 14, and the oil outlet end of the driving motor cooling branch 18 is connected with the driving motor, so that the driving motor can be cooled. The oil inlet end of the clutch cooling branch 17 is connected with the oil cooler 14, and the oil outlet end of the clutch cooling branch 17 is connected with the clutch, so that the clutch can be cooled. The oil inlet end of the gear shaft cooling branch 12 is connected with the oil cooler 14, and the oil outlet end of the gear shaft cooling branch 12 is connected with the gear shaft, so that the gear shaft can be cooled.
As shown in fig. 1, the cooling oil circuit further includes a cooling pressure control valve 19, and the cooling pressure control valve 19 is connected to the oil tank, the oil cooler 14, and the main pressure regulating valve 3. The opening of the pressure control valve 19 is pressure-controlled to release the excess flow. An oil outlet of the main pressure regulating valve 3 is connected with an oil inlet of an oil cooler 14. The generator cooling control valve 4 is a pilot type slide valve, the generator cooling control valve 4 is provided with a pilot control port, an oil inlet and an oil outlet, the pilot control port of the generator cooling control valve 4 is connected with the oil outlet of the main pressure regulating valve 3 and the oil outlet of the first one-way valve 10, the oil inlet of the generator cooling control valve 4 is connected with the oil outlet of the main pressure regulating valve 3 and the oil outlet of the first one-way valve 10, and the oil outlet of the generator cooling control valve 4 is connected with an oil tank.
As shown in fig. 1, the clutch pressure control valve 5 is connected to an accumulator 15, and the accumulator 15 is connected to the clutch. The working pressure range of the accumulator 15 is 1-9Bar, and the initial working pressure of the accumulator 15 is larger than the pressure of a clutch KP point (clutch half-joint point), so that the response speed of the clutch can be improved. The accumulator 15 is connected to an oil line connecting the clutch and the clutch pressure control valve 5, and the connection point of the accumulator 15 to the oil line is located between the clutch and the clutch pressure control valve 5.
In the present embodiment, the hybrid transmission is a single-stage DHT transmission.
The hydraulic system of the hybrid transmission case with the structure has the following advantages:
(1) the control of the cooling and lubricating flow and the clutch pressure under the working conditions of pure electricity, series connection, parallel connection, direct drive of an engine and the like only needs to adopt one switching electromagnetic valve, so that the control elements are relatively few, the arrangement is compact, the space is small, the cost advantage is obvious, and the space occupied by the valve body is reduced;
(2) the output end of the switch electromagnetic valve is connected with the spring side of the main pressure regulating valve 3 and the pilot side of the clutch pressure valve, when the switch electromagnetic valve is opened, the pressure of a main oil way is boosted, and meanwhile, the clutch pressure regulating valve core is pushed to move, so that the action of the clutch is finished;
(3) distributing the cooling flow through the throttling hole;
(4) the opening of the pressure control valve 19 is pressure-controlled to release the excess flow.
The invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-described manner. Various insubstantial improvements are made by adopting the method conception and the technical proposal of the utility model; or without improvement, the above conception and technical solution of the present invention can be directly applied to other occasions, all within the protection scope of the present invention.
Claims (10)
1. Hybrid transmission hydraulic system, its characterized in that: the clutch pressure control oil path is connected with the main pressure regulating valve through a pilot oil path, and the switch valve is connected with a pilot oil path of the control valve.
2. The hybrid transmission hydraulic system according to claim 1, wherein: the clutch pressure control oil path comprises a clutch pressure control valve, and the clutch pressure control valve is connected with the pilot oil path.
3. The hybrid transmission hydraulic system according to claim 2, wherein: the output end of the switch valve is connected with the spring side of the main pressure regulating valve and the pilot side of the clutch pressure control valve through the pilot oil way, and when the switch valve is opened, the pressure of the main oil way is boosted, and meanwhile, the valve core of the clutch pressure control valve is pushed to move.
4. The hybrid transmission hydraulic system according to claim 2, wherein: a first orifice is provided in the pilot oil passage, and the first orifice is located between the on-off valve and the clutch pressure control valve.
5. The hybrid transmission hydraulic system according to claim 4, wherein: a second orifice is provided in the pilot oil passage, and the second orifice is located between the on-off valve and the main pressure regulating valve.
6. The hybrid transmission hydraulic system according to any one of claims 1 to 5, characterized in that: the cooling oil path is connected with the clutch and the driving motor, the cooling oil path comprises a first one-way valve and an oil cooler, and the generator cooling control valve is connected with the oil cooler.
7. The hybrid transmission hydraulic system according to claim 6, wherein: the cooling oil circuit further comprises a cooling pressure control valve, and the cooling pressure control valve is connected with the oil tank, the oil cooler and the main pressure regulating valve.
8. The hybrid transmission hydraulic system according to any one of claims 1 to 5, characterized in that: the clutch pressure control valve is connected with an energy accumulator, and the energy accumulator is connected with the clutch.
9. The hybrid transmission hydraulic system according to claim 8, wherein: the working pressure range of the energy accumulator is 1-9Bar, and the initial working pressure of the energy accumulator is greater than the pressure of a KP point of the clutch.
10. The hybrid transmission hydraulic system according to any one of claims 1 to 5, characterized in that: the first hydraulic pump is connected with the differential, and the second hydraulic pump is connected with an output shaft of the engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220976343.1U CN217081182U (en) | 2022-04-25 | 2022-04-25 | Hydraulic system of hybrid transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220976343.1U CN217081182U (en) | 2022-04-25 | 2022-04-25 | Hydraulic system of hybrid transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217081182U true CN217081182U (en) | 2022-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220976343.1U Active CN217081182U (en) | 2022-04-25 | 2022-04-25 | Hydraulic system of hybrid transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217081182U (en) |
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2022
- 2022-04-25 CN CN202220976343.1U patent/CN217081182U/en active Active
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Effective date of registration: 20240129 Address after: Room 32, 5th Floor, Comprehensive Service Building, Management Committee of Fanchang Economic Development Zone, Fanchang District, Wuhu City, Anhui Province, 241000 Patentee after: Anhui Fuzhen Automobile Power System Co.,Ltd. Country or region after: China Address before: 215000 16F, building a, vitality Business Plaza, No. 185 jumao street, Yuanhe street, Xiangcheng District, Suzhou City, Jiangsu Province Patentee before: Jifu Automotive Technology (Suzhou) Co.,Ltd. Country or region before: China |
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