CN113294516A - Hydraulic oil supply system of transmission - Google Patents

Hydraulic oil supply system of transmission Download PDF

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Publication number
CN113294516A
CN113294516A CN202010108091.6A CN202010108091A CN113294516A CN 113294516 A CN113294516 A CN 113294516A CN 202010108091 A CN202010108091 A CN 202010108091A CN 113294516 A CN113294516 A CN 113294516A
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China
Prior art keywords
oil
pressure
valve
communicated
inlet
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CN202010108091.6A
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Chinese (zh)
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CN113294516B (en
Inventor
栾智存
黄新志
梁东伟
戴良顺
邓云飞
刘学武
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Guangzhou Automobile Group Co Ltd
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Guangzhou Automobile Group Co Ltd
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Priority to CN202010108091.6A priority Critical patent/CN113294516B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/0003—Arrangement or mounting of elements of the control apparatus, e.g. valve assemblies or snapfittings of valves; Arrangements of the control unit on or in the transmission gearbox
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/0003—Arrangement or mounting of elements of the control apparatus, e.g. valve assemblies or snapfittings of valves; Arrangements of the control unit on or in the transmission gearbox
    • F16H61/0009—Hydraulic control units for transmission control, e.g. assembly of valve plates or valve units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/0021—Generation or control of line pressure
    • F16H61/0025—Supply of control fluid; Pumps therefore
    • F16H61/0031—Supply of control fluid; Pumps therefore using auxiliary pumps, e.g. pump driven by a different power source than the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/0021—Generation or control of line pressure
    • F16H2061/0037—Generation or control of line pressure characterised by controlled fluid supply to lubrication circuits of the gearing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Transmission Device (AREA)

Abstract

The invention belongs to the technical field of transmissions and relates to a hydraulic oil supply system of a transmission. The hydraulic oil supply system of the transmission comprises an oil tank, a mechanical oil pump, an electronic oil pump, a pressure control device, a pressure switch valve and a main oil way, wherein the mechanical oil pump and the electronic oil pump are respectively communicated between the oil tank and the main oil way, and the main oil way is communicated with an oil inlet of a pressure control oil way of a vehicle; the pressure control device is used for controlling the communication or disconnection between the main oil way and the oil inlet of the mechanical oil pump and between the main oil way and the cooling and lubricating oil way of the vehicle, so that the oil pressure in the main oil way is adjusted; the pressure switch valve is used for controlling the connection or disconnection between the electronic oil pump and a cooling and lubricating oil path of the vehicle. The hydraulic oil supply system of the transmission has three working modes, and the transmission can continuously supply oil to components in start-stop working and sliding modes without being influenced by the rotating speed of an engine driving a mechanical oil pump.

Description

Hydraulic oil supply system of transmission
Technical Field
The invention belongs to the technical field of transmissions, and particularly relates to a hydraulic oil supply system of a transmission.
Background
In the working process of the automatic transmission, all actions are mainly controlled by a hydraulic system, particularly the automatic transmission mainly based on electro-hydraulic control. The oil supply system, which is an important component of the hydraulic system, provides continuous power for the hydraulic system, provides hydraulic oil for components such as a hydraulic torque converter, a hydraulic actuator and a control valve, and simultaneously provides cooling and lubricating oil for components such as a clutch and a gear.
With the development of automobile energy-saving technology and hybrid power technology, the requirements of the transmission on the working efficiency, control precision, energy consumption level and the like of an oil supply system are continuously improved, and the oil supply system of the transmission is developed from a traditional mechanical oil pump to a double-pump system and an electronic oil pump.
Most of the existing domestic and foreign automatic transmissions adopt a mechanical oil pump as a hydraulic oil supply source. However, the power and flow demand of the transmission for hydraulic oil varies at any time according to load, and there are peaks and valleys, and when only a mechanical oil pump is provided, the mechanical oil pump needs to be designed according to the maximum demand, the discharge capacity of the mechanical oil pump is designed to be large, and energy waste is generated. Therefore, an auxiliary electronic oil pump is added to a part of automatic transmissions at present, but the auxiliary electronic oil pump is only used for assisting in providing cooling and lubricating flow, and cannot meet the requirements of starting and stopping of the whole vehicle and the sliding and stopping operation.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the technical problem that the existing automatic transmission cannot meet the requirements of starting, stopping, sliding and stopping of the whole vehicle, the hydraulic oil supply system of the transmission is provided.
In order to solve the technical problem, an embodiment of the present invention provides a hydraulic oil supply system for a transmission, including an oil tank, a mechanical oil pump, an electronic oil pump, a pressure control device, a pressure switch valve, and a main oil path, where the mechanical oil pump and the electronic oil pump are respectively communicated between the oil tank and the main oil path, and the main oil path is communicated with an oil inlet of a pressure control oil path of a vehicle;
the pressure control device is connected among the main oil way, the oil inlet of the mechanical oil pump and the oil inlet of the cooling and lubricating oil way of the vehicle, and is used for controlling the connection or disconnection between the main oil way and the oil inlet of the mechanical oil pump and between the main oil way and the cooling and lubricating oil way of the vehicle, so that the oil pressure in the main oil way is adjusted;
the pressure switch valve is connected among the main oil way, the oil outlet of the electronic oil pump and the oil inlet of the cooling and lubricating oil way of the vehicle, and the pressure switch valve is used for controlling the connection or disconnection between the electronic oil pump and the cooling and lubricating oil way of the vehicle.
According to the hydraulic oil supply system of the transmission, the double-pump system of the mechanical oil pump and the electronic oil pump is adopted for supplying oil to the hydraulic oil supply system, so that the hydraulic oil supply system of the transmission has three working modes, the transmission can continuously supply oil to components in the start-stop working mode and the coast stop mode without being influenced by the rotating speed of the engine driving the mechanical oil pump, and the responsiveness of combining the engine with the clutch in the starting process can also be improved. When an engine driving the mechanical oil pump stops working, the electronic oil pump can work alone to establish main oil pressure so as to meet all working condition requirements of the vehicle on the transmission in start-stop and sliding stop modes. Meanwhile, when the mechanical oil pump works, the electronic oil pump can perform automatic switching of two working conditions of assisting in building main oil pressure and completely providing cooling and lubricating flow based on the pressure of the main oil path built by the mechanical oil pump, and when the pressure of the main oil path built by the mechanical oil pump reaches a certain limit value, the electronic oil pump completely provides extra oil to the cooling and lubricating oil path of the vehicle, so that the design displacement of the mechanical oil pump is effectively reduced. In addition, the hydraulic oil supply system of the transmission provided by the embodiment of the invention has the advantages of small element number, simple structure and low cost.
Optionally, the pressure control device comprises a pressure control solenoid valve and a pressure control slide valve, and the pressure control slide valve is connected among the main oil path, the oil inlet of the mechanical oil pump and the oil inlet of the cooling and lubricating oil path of the vehicle;
the pressure control electromagnetic valve is used for controlling the valve core of the pressure control slide valve to slide, so that the main oil way is communicated or disconnected with the oil inlet of the mechanical oil pump and the oil inlet of the cooling and lubricating oil way of the vehicle.
Optionally, the pressure control slide valve is provided with a first oil inlet, a first oil outlet and a second oil outlet, the first oil inlet is communicated with the main oil path, the first oil outlet is communicated with an oil inlet of the mechanical oil pump, and the second oil outlet is communicated with an oil inlet of the cooling and lubricating oil path;
the valve core of the pressure control slide valve is provided with a first position, a second position and a third position;
when the pressure control electromagnetic valve is powered off, the valve core of the pressure control slide valve is at a first position, the first oil inlet is disconnected with the first oil outlet, and the first oil inlet is disconnected with the second oil outlet;
when the pressure control electromagnetic valve is electrified, the valve core of the pressure control slide valve slides to a second position or a third position from a first position; in the second position, the first oil inlet is disconnected from the first oil outlet, and the first oil inlet is communicated with the second oil outlet; in the third position, the first oil inlet is communicated with the first oil outlet, and the first oil inlet is communicated with the second oil outlet.
Optionally, the pressure control slide valve is further provided with a first control end and a feedback end, and the feedback end is communicated with the main oil path;
the pressure control electromagnetic valve is provided with a second oil inlet, a third oil outlet and a first pressure relief opening communicated with the oil tank, the second oil inlet is communicated with the main oil way, the second oil inlet is communicated with the third oil outlet, and the third oil outlet is communicated with the first control end;
when the pressure control electromagnetic valve is powered off, the second oil inlet is disconnected with the first pressure relief opening, and a valve core of the pressure control slide valve is located at a first position;
when the pressure control electromagnetic valve is electrified, the second oil inlet is communicated with the first pressure relief opening, so that the valve core of the pressure control slide valve slides to a second position or a third position from a first position.
Optionally, the hydraulic oil supply system further comprises a pressure stabilizing accumulator connected between the pressure control solenoid valve and the pressure control slide valve, and the pressure stabilizing accumulator is used for stabilizing the pressure of the oil flowing from the pressure control solenoid valve to the pressure control slide valve.
Optionally, a second control end, a third oil inlet and a fourth oil outlet are arranged on the pressure switch valve, the second control end is communicated with the main oil path, the third oil inlet is communicated with an oil outlet of the electronic oil pump, and the fourth oil outlet is communicated with an oil inlet of the cooling and lubricating oil path;
when the oil pressure in the main oil way is greater than a first preset value, the second control end controls the third oil inlet to be communicated with the fourth oil outlet;
and when the oil pressure in the main oil way is smaller than a first preset value, the second control end controls the third oil inlet to be disconnected with the fourth oil outlet.
Optionally, the hydraulic oil supply system further includes a first check valve, a second check valve, a third check valve, and a fourth check valve, an oil inlet of the first check valve is communicated with an oil outlet of the mechanical oil pump, and an oil outlet of the first check valve is communicated with the main oil passage;
an oil inlet of the second one-way valve is communicated with the oil tank, and an oil outlet of the second one-way valve is communicated with an oil inlet of the electronic oil pump;
an oil inlet of the third one-way valve is communicated with an oil outlet of the electronic oil pump, and an oil outlet of the third one-way valve is communicated with the main oil way;
an oil inlet of the fourth one-way valve is communicated with an oil outlet of the electronic oil pump, and an oil outlet of the fourth one-way valve is communicated with the third oil inlet.
Optionally, the hydraulic oil supply system further comprises an oil suction filter, an oil inlet of the oil suction filter is communicated with the oil tank, an oil outlet of the oil suction filter is communicated with an oil inlet of the mechanical oil pump and an oil inlet of the electronic oil pump, and the oil suction filter is used for filtering oil.
Optionally, the hydraulic oil supply system further includes a safety valve, the safety valve is provided with a fourth oil inlet and a second pressure relief port communicated with the oil tank, and the fourth oil inlet is communicated with the main oil path;
when the oil pressure in the main oil way is greater than a second preset value, the fourth oil inlet is communicated with the second pressure relief opening;
and when the oil pressure in the main oil way is smaller than a second preset value, the fourth oil inlet is disconnected with the second pressure relief opening.
Optionally, the hydraulic oil supply system further comprises a pressure sensor for sensing an oil pressure in the main oil passage.
Drawings
Fig. 1 is a schematic view of a hydraulic oil supply system according to an embodiment of the present invention.
The reference numerals in the specification are as follows:
1. an oil tank;
2. a mechanical oil pump;
3. an electronic oil pump;
4. a pressure switching valve; 401. a second control terminal; 402. a third oil inlet; 403. a fourth oil outlet;
5. a main oil path;
6. a pressure control solenoid valve; 601. a second oil inlet; 602. a third oil outlet; 603. a first pressure relief port; 604. a feedback port;
7. a pressure control spool valve; 701. a first oil inlet; 702. a first oil outlet; 703. a second oil outlet; 704. a first control terminal; 705. a feedback terminal;
8. a regulated pressure accumulator;
9. a first check valve;
10. a second one-way valve;
11. a third check valve;
12. a fourth check valve;
13. an oil suction filter;
14. a safety valve; 1401. a fourth oil inlet; 1402. a second pressure relief vent;
15. a pressure sensor.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, a hydraulic oil supply system according to an embodiment of the present invention includes an oil tank 1, a mechanical oil pump 2, an electronic oil pump 3, a pressure control device, a pressure switching valve 4, and a main oil path 5, where the mechanical oil pump 2 and the electronic oil pump 3 are respectively communicated between the oil tank 1 and the main oil path 5, and the main oil path 5 is communicated with an oil inlet of a pressure control oil path of a vehicle.
The pressure control device is connected among the main oil way 5, an oil inlet of the mechanical oil pump 2 and an oil inlet of a cooling and lubricating oil way of the vehicle, and is used for controlling the connection or disconnection between the main oil way 5 and the oil inlet of the mechanical oil pump 2 and the cooling and lubricating oil way of the vehicle, so that the oil pressure in the main oil way 5 is adjusted.
The pressure switch valve 4 is connected among the main oil path 5, an oil outlet of the electronic oil pump 3 and an oil inlet of a cooling and lubricating oil path of the vehicle, and the pressure switch valve 4 is used for controlling the connection or disconnection between the electronic oil pump 3 and the cooling and lubricating oil path of the vehicle.
According to the hydraulic oil supply system provided by the embodiment of the invention, the double-pump system of the mechanical oil pump 2 and the electronic oil pump 3 is adopted to supply oil to the hydraulic oil supply system, so that the hydraulic oil supply system of the transmission has three working modes, the transmission can continuously supply oil to components in start-stop working and sliding stop modes without being influenced by the rotating speed of an engine driving the mechanical oil pump 2, and the responsiveness of the combination of the engine and a clutch in starting can also be improved. When the engine driving the mechanical oil pump 2 stops working, the electronic oil pump 3 can work alone to establish the main oil pressure so as to meet all working condition requirements of the vehicle on the transmission in start-stop and coast stop modes. Meanwhile, when the mechanical oil pump 2 works, the electronic oil pump 3 can assist in automatic switching of two working conditions of building main oil pressure and completely providing cooling and lubricating flow based on the pressure of the main oil way 5 built by the mechanical oil pump 2, and when the pressure of the main oil way 5 built by the mechanical oil pump 2 reaches a certain limit value, the electronic oil pump 3 completely provides extra oil to the cooling and lubricating oil way of the vehicle, so that the design displacement of the mechanical oil pump 2 is effectively reduced. In addition, the hydraulic oil supply system of the transmission provided by the embodiment of the invention has the advantages of small element number, simple structure and low cost.
In one embodiment, as shown in fig. 1, the mechanical oil pump 2 may be a double-acting vane pump or a gear pump, and the mechanical oil pump 2 is driven by an engine.
The electronic oil pump 3 can adopt an inner rotor pump or a gear pump, and the electronic oil pump 3 is driven by a motor thereof.
In one embodiment, as shown in fig. 1, the pressure control device includes a pressure control solenoid valve 6 and a pressure control slide valve 7, and the pressure control slide valve 7 is connected among the main oil path 5, an oil inlet of the mechanical oil pump 2 and an oil inlet of a cooling and lubricating oil path of the vehicle.
The pressure control electromagnetic valve 6 is used for controlling the valve core of the pressure control slide valve 7 to slide, so that the main oil path 5 is communicated or disconnected with the oil inlet of the mechanical oil pump 2 and the oil inlet of the cooling and lubricating oil path of the vehicle.
When the main oil path 5 is disconnected from an oil inlet of the mechanical oil pump 2 and the main oil path 5 is disconnected from an oil inlet of a cooling and lubricating oil path of the vehicle, the oil delivered to the mechanical oil pump 2 and the electronic oil pump 3 from the oil tank 1 is directly delivered into the main oil path 5 and finally delivered to a pressure control oil path of the vehicle.
When the main oil way 5 is disconnected from an oil inlet of the mechanical oil pump 2 and the main oil way 5 is communicated with an oil inlet of a cooling and lubricating oil way of a vehicle, part of oil conveyed to the mechanical oil pump 2 and the electronic oil pump 3 from the oil tank 1 is conveyed into the main oil way 5 and finally conveyed to a pressure control oil way of the vehicle; and part of the oil is conveyed to a cooling and lubricating oil way of the vehicle.
When the main oil path 5 is communicated with an oil inlet of the mechanical oil pump 2 and the main oil path 5 is communicated with an oil inlet of a cooling and lubricating oil path of a vehicle, part of oil delivered to the mechanical oil pump 2 and the electronic oil pump 3 from the oil tank 1 is delivered into the main oil path 5 and finally delivered to a pressure control oil path of the vehicle; part of the cooling lubricating oil is conveyed to a cooling lubricating oil way of the vehicle; and part of the oil is conveyed to an oil inlet of the mechanical oil pump 2 and an oil inlet of the electronic oil pump 3, so that oil is provided for the mechanical oil pump 2 and the electronic oil pump 3, and the pressure of the main oil path 5 can be relieved.
In an embodiment, as shown in fig. 1, a first oil inlet 701, a first oil outlet 702 and a second oil outlet 703 are provided on the pressure control slide valve 7, the first oil inlet 701 is communicated with the main oil path 5, the first oil outlet 702 is communicated with the oil inlet of the mechanical oil pump 2, and the second oil outlet 703 is communicated with the oil inlet of the cooling lubricating oil path.
The spool of the pressure control spool valve 7 is provided with a first position, a second position and a third position.
When the pressure control electromagnetic valve 6 is powered off, the spool of the pressure control slide valve 7 is in the first position, the first oil inlet 701 is disconnected from the first oil outlet 702, so that the main oil path 5 is disconnected from the oil inlet of the mechanical oil pump 2, the first oil inlet 701 is disconnected from the second oil outlet 703, and the main oil path 5 is disconnected from the oil inlet of the cooling and lubricating oil path of the vehicle.
When the pressure control solenoid valve 6 is energized, the spool of the pressure control spool valve 7 slides from the first position to the second position or the third position. In the second position, the first oil inlet 701 is disconnected from the first oil outlet 702, so that the main oil path 5 is disconnected from the oil inlet of the mechanical oil pump 2, the first oil inlet 701 is communicated with the second oil outlet 703, and the main oil path 5 is communicated with the oil inlet of the cooling and lubricating oil path of the vehicle. In the third position, the first oil inlet 701 is communicated with the first oil outlet 702, so that the main oil path 5 is communicated with the oil inlet of the mechanical oil pump 2 and the oil inlet of the electronic oil pump 3, and the first oil inlet 701 is communicated with the second oil outlet 703, so that the main oil path 5 is communicated with the oil inlet of the cooling and lubricating oil path of the vehicle.
In one embodiment, as shown in fig. 1, the pressure control spool 7 is further provided with the first control end 704 and a feedback end 705, and the feedback end 705 is communicated with the main oil passage 5.
The pressure control solenoid valve 6 is provided with a second oil inlet 601, a third oil outlet 602 and a first pressure relief port 603 communicated with the oil tank 1, the second oil inlet 601 is communicated with the main oil path 5, the second oil inlet 601 is communicated with the third oil outlet 602, and the third oil outlet 602 is communicated with the first control end 704.
When the pressure control electromagnetic valve 6 is powered off, the second oil inlet 601 is disconnected from the first pressure relief port 603, and the valve core of the pressure control slide valve 7 is in the first position.
When the pressure control solenoid valve 6 is powered on, the second oil inlet 601 is communicated with the first pressure relief port 603, so that oil flowing through the pressure control solenoid valve 6 is relieved, the oil pressure of the oil conveyed to the first control end 704 is reduced, and the spool of the pressure control spool 7 slides from the first position to the second position or the third position.
When the pressure control solenoid valve 6 is powered off, the oil pressure of the oil delivered to the spool of the pressure control spool 7 through the pressure control solenoid valve 6 is the oil pressure of the main oil passage 5, and the feedback end 705 is communicated with the main oil passage 5. When the pressure control solenoid valve 6 is energized, the oil pressure of the oil delivered to the spool of the pressure control spool 7 through the pressure control solenoid valve 6 is reduced, so that the spool of the pressure control spool 7 moves, and the pressure regulation of the main oil passage 5 is realized.
In an embodiment, the third oil outlet 602 and the first control end 704 may be communicated through a throttle, and the feedback end 705 and the main oil passage 5 may be communicated through a throttle.
In an embodiment, as shown in fig. 1, the pressure control solenoid valve 6 employs a two-position three-way normally-open proportional pressure reducing valve, and the oil pressure of the oil flowing out from the third oil outlet 602 is linearly controlled by adjusting the magnitude of the control current of the pressure control solenoid valve 6, so as to achieve connection or disconnection between the main oil path 5 and the oil inlet of the mechanical oil pump 2 and the oil inlet of the cooling and lubricating oil path of the vehicle, and further linearly control the oil pressure of the main oil path 5.
In an embodiment, as shown in fig. 1, a feedback port 604 is further disposed on the pressure control solenoid valve 6, and the third oil outlet 602 communicates with the feedback port 604 through a first oil path a to implement pressure feedback.
In one embodiment, as shown in FIG. 1, the pressure control spool 7 is a three-position, three-way spool valve.
In one embodiment, as shown in fig. 1, the hydraulic oil supply system further includes a pressure stabilizing accumulator 8 connected between the pressure control solenoid valve 6 and the pressure control spool valve 7, wherein the pressure stabilizing accumulator 8 is used for stabilizing the pressure of the oil flowing from the pressure control solenoid valve 6 to the pressure control spool valve 7.
In an embodiment, the pressure-stabilizing accumulator 8 may consist of an accumulator piston chamber, an accumulator piston and a spring.
In an embodiment, as shown in fig. 1, a second control end 401, a third oil inlet 402 and a fourth oil outlet 403 are provided on the pressure switch valve 4, the second control end 401 is communicated with the main oil path 5, the third oil inlet 402 is communicated with the oil outlet of the electronic oil pump 3, and the fourth oil outlet 403 is communicated with the oil inlet of the cooling lubricating oil path.
When the oil pressure in the main oil path 5 is greater than a first preset value, the second control end 401 controls the third oil inlet 402 to communicate with the fourth oil outlet 403, so that the electronic oil pump 3 directly supplies oil to the cooling and lubricating oil path. When the oil pressure in the main oil path 5 is smaller than a first preset value, the second control end 401 controls the third oil inlet 402 to be disconnected from the fourth oil outlet 403, so that the electronic oil pump 3 directly supplies oil to the main oil path 5.
In an embodiment, the first preset value may be set according to actual needs. In the low-pressure hydraulic oil supply system, the first preset value may be set to 12 bar.
In one embodiment, as shown in fig. 1, the pressure switching valve 4 is a two-position two-way spool valve.
In an embodiment, as shown in fig. 1, the hydraulic oil supply system further includes a first check valve 9, a second check valve 10, a third check valve 11, and a fourth check valve 12, an oil inlet of the first check valve 9 communicates with an oil outlet of the mechanical oil pump 2, an oil outlet of the first check valve 9 communicates with the main oil passage 5, and the first check valve 9 can prevent oil delivered to the main oil passage 5 from flowing back to the mechanical oil pump 2.
An oil inlet of the second check valve 10 is communicated with the oil tank 1, an oil outlet of the second check valve 10 is communicated with an oil inlet of the electronic oil pump 3, and the second check valve 10 can prevent oil conveyed to the electronic oil pump 3 from flowing back to the oil tank 1.
An oil inlet of the third check valve 11 is communicated with an oil outlet of the electronic oil pump 3, an oil outlet of the third check valve 11 is communicated with the main oil path 5, and the third check valve 11 can prevent oil conveyed to the main oil path 5 from flowing back to the electronic oil pump 3.
An oil inlet of the fourth check valve 12 is communicated with an oil outlet of the electronic oil pump 3, an oil outlet of the fourth check valve 12 is communicated with the third oil inlet 402, and the fourth check valve 12 can prevent the oil delivered to the third oil inlet 402 from flowing back to the electronic oil pump 3.
In an embodiment, as shown in fig. 1, the hydraulic oil supply system further includes an oil suction filter 13, an oil inlet of the oil suction filter 13 is communicated with the oil tank 1, an oil outlet of the oil suction filter 13 is communicated with an oil inlet of the mechanical oil pump 2 and an oil inlet of the electronic oil pump 3, and the oil suction filter 13 is configured to filter oil.
Oil filter 13 arranges the front end of mechanical oil pump 2 and electronic oil pump 3 to right by oil tank 1 flow direction mechanical oil pump 2 with the impurity in the fluid is got rid of to the fluid of electronic oil pump 3 filters.
In an embodiment, as shown in fig. 1, the hydraulic oil supply system further includes a relief valve 14, the relief valve 14 is provided with a fourth oil inlet 1401 and a second relief port 1402 communicated with the oil tank 1, and the fourth oil inlet 1401 is communicated with the main oil path 5.
When the oil pressure in the main oil path 5 is greater than a second preset value, the fourth oil inlet 1401 is communicated with the second pressure relief opening 1402, so as to relieve the pressure in the main oil path 5. When the oil pressure in the main oil path 5 is smaller than a second preset value, the fourth oil inlet 1401 is disconnected from the second pressure relief opening 1402.
The safety valve 14 is arranged on the main oil path 5, and ensures that the pressure of the main oil path 5 does not exceed a second preset value.
The second preset value can be set according to actual needs. In the low-pressure hydraulic oil supply system, the second preset value may be set to 35 bar. In the high-pressure hydraulic oil supply system, the second preset value may be set to 80 bar.
In one embodiment, as shown in fig. 1, the hydraulic oil supply system further includes a pressure sensor 15 for sensing the oil pressure in the main oil passage 5.
The pressure sensor 15 detects a pressure signal of the main oil passage 5 and sends the pressure signal to the controller so as to facilitate reading.
The embodiment of the invention provides three working modes of a hydraulic oil supply system, which are as follows:
the first working mode is as follows: the mechanical oil pump 2 operates alone.
The mechanical oil pump 2 sucks oil from the oil tank 1 through the oil suction filter 13, the oil enters the main oil way 5 through the first one-way valve 9, and the main oil way 5 is directly communicated with the pressure control oil way to realize hydraulic gear shifting control and clutch control. And the main oil circuit 5 is provided with a safety valve 14 for controlling the oil pressure of the hydraulic oil supply system to be smaller than a second preset value. The pressure control solenoid valve 6 controls the current according to the pressure requirement, the third oil outlet 602 outputs oil at the target pressure, and a part of the oil is delivered to the feedback port 604 of the pressure control solenoid valve 6 through the first oil path a; another part is fed to the first control end 704 of the delivery pressure control spool valve 7, regulating the position of the spool of said pressure control spool valve 7.
A valve core of the pressure control slide valve 7 is provided with three positions, and in a first position, the first oil inlet 701 is closed, the first oil inlet 701 is disconnected with the first oil outlet 702, and the first oil inlet 701 is disconnected with the second oil outlet 703; in the second position, the first oil inlet 701 is communicated with the second oil outlet 703, so that the main oil path 5 is communicated with an oil inlet of a cooling and lubricating oil path of the vehicle for cooling the clutch and lubricating the shaft teeth. In the third position, the first oil inlet 701 is simultaneously communicated with the first oil outlet 702 and the second oil outlet 703, so that the main oil path 5 is communicated with an oil inlet of a cooling and lubricating oil path of a vehicle, and is used for cooling a clutch and lubricating shaft teeth, and the main oil path 5 is communicated with an oil inlet of the mechanical oil pump 2 and an oil inlet of the electronic oil pump 3 for oil supplement.
At this time, the electronic oil pump 3 does not operate, and the oil in the main oil passage 5 is stopped at the third check valve 11.
And a second working mode: the electronic oil pump 3 operates alone.
The electronic oil pump 3 sucks oil from the oil tank 1 through the oil suction filter 13 and the second check valve 10. The oil output by the oil outlet of the electronic oil pump 3 is divided into two paths, one path is conveyed to a main conveying oil path 5 through the third one-way valve 11, and the main conveying oil path 5 is directly communicated with a pressure control oil path to realize hydraulic gear shifting control and clutch control; one path is sent to the third oil inlet 402 of the pressure switch valve 4 through the fourth check valve 12. And the main oil circuit 5 is provided with a safety valve 14 for controlling the oil pressure of the hydraulic oil supply system to be smaller than a second preset value. The pressure control solenoid valve 6 controls the current according to the pressure requirement, the third oil outlet 602 outputs oil at the target pressure, and a part of the oil is delivered to the feedback port 604 of the pressure control solenoid valve 6 through the first oil path a; another part is fed to the first control end 704 of the delivery pressure control spool valve 7, regulating the position of the spool of said pressure control spool valve 7.
A valve core of the pressure control slide valve 7 is provided with three positions, and in a first position, the first oil inlet 701 is closed, the first oil inlet 701 is disconnected with the first oil outlet 702, and the first oil inlet 701 is disconnected with the second oil outlet 703; in the second position, the first oil inlet 701 is communicated with the second oil outlet 703, so that the main oil path 5 is communicated with an oil inlet of a cooling and lubricating oil path of the vehicle for cooling the clutch and lubricating the shaft teeth. In the third position, the first oil inlet 701 is simultaneously communicated with the first oil outlet 702 and the second oil outlet 703, so that the main oil path 5 is communicated with an oil inlet of a cooling and lubricating oil path of a vehicle, and is used for cooling a clutch and lubricating shaft teeth, and the main oil path 5 is communicated with an oil inlet of the mechanical oil pump 2 and an oil inlet of the electronic oil pump 3 for oil supplement.
The second control end 401 of the pressure switch valve 4 is communicated with the main oil path 5, if the oil pressure of the main oil path 5 is smaller than a first preset value, the third oil inlet 402 of the pressure switch valve 4 is closed, and the oil of the electronic oil pump 3 is communicated with the main oil path 5 only through the third check valve 11, so as to establish the pressure of the main oil path 5. If the oil pressure of the main oil path 5 is greater than the first preset value, the third oil inlet 402 of the pressure switch valve 4 is communicated with the fourth oil outlet 403, so that the oil output by the electronic oil pump 3 can enter a cooling and lubricating oil path, and cooling of the clutch and lubrication of the shaft teeth are realized.
When the electronic oil pump 3 works independently, the oil pressure of the main oil way 5 is limited to a first preset value to the maximum extent, and the pressure value can meet the gear shifting requirements of starting and stopping of the whole vehicle and sliding and stopping of the vehicle.
And a third working mode: the mechanical oil pump 2 and the electronic oil pump 3 operate simultaneously.
The mechanical oil pump 2 sucks oil from the oil tank 1 through the oil suction filter 13, the oil enters the main oil way 5 through the first one-way valve 9, and the main oil way 5 is directly communicated with the pressure control oil way to realize hydraulic gear shifting control and clutch control. And the main oil circuit 5 is provided with a safety valve 14 for controlling the oil pressure of the hydraulic oil supply system to be smaller than a second preset value. The pressure control solenoid valve 6 controls the current according to the pressure requirement, the third oil outlet 602 outputs oil at the target pressure, and a part of the oil is delivered to the feedback port 604 of the pressure control solenoid valve 6 through the first oil path a; another part is fed to the first control end 704 of the delivery pressure control spool valve 7, regulating the position of the spool of said pressure control spool valve 7. The first oil inlet 701 is closed by adjusting the position of a valve core of the pressure control slide valve 7; or the first oil inlet 701 is communicated with the second oil outlet 703 for cooling the clutch and lubricating the shaft teeth; or the first oil inlet 701 is simultaneously communicated with the first oil outlet 702 and the second oil outlet 703, and is used for cooling the clutch and lubricating the shaft teeth, and supplementing oil to the mechanical oil pump 2 and the electronic oil pump 3.
The electronic oil pump 3 starts to work, and the electronic oil pump 3 sucks oil from the oil tank 1 through the oil suction filter 13 and the second one-way valve 10. The oil output by the oil outlet of the electronic oil pump 3 is divided into two paths, and one path of the oil is conveyed to the main conveying oil path 5 through the third one-way valve 11; one path is sent to the third oil inlet 402 of the pressure switch valve 4 through the fourth check valve 12.
The second control end 401 of the pressure switch valve 4 communicates with the main oil passage 5.
If the oil pressure of the main oil path 5 is smaller than a first preset value, the third oil inlet 402 of the pressure switch valve 4 is closed, the oil of the electronic oil pump 3 is communicated with the main oil path 5 only through the third check valve 11, and the pressure of the main oil path 5 is established together with the mechanical oil pump 2.
If the oil pressure of the main oil path 5 is greater than the first preset value, the third oil inlet 402 of the pressure switch valve 4 is communicated with the fourth oil outlet 403, so that the oil output by the electronic oil pump 3 can enter the cooling and lubricating oil path. Because the load pressure of the cooling and lubricating oil path is low, the third check valve 11 is in a reverse cut-off state due to the large oil pressure of the main oil path 5, and all the output oil of the electronic oil pump 3 enters the cooling and lubricating oil path through the fourth check valve 12 and the pressure switch valve 4, so that the cooling of the clutch and the lubrication of the shaft teeth are realized.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The hydraulic oil supply system of the transmission is characterized by comprising an oil tank, a mechanical oil pump, an electronic oil pump, a pressure control device, a pressure switch valve and a main oil way, wherein the mechanical oil pump and the electronic oil pump are respectively communicated between the oil tank and the main oil way, and the main oil way is communicated with an oil inlet of a pressure control oil way of a vehicle;
the pressure control device is connected among the main oil way, an oil inlet of the mechanical oil pump and an oil inlet of a cooling and lubricating oil way of the vehicle, and is used for controlling the connection or disconnection among the main oil way, the mechanical oil pump and the cooling and lubricating oil way of the vehicle so as to adjust the oil pressure in the main oil way;
the pressure switch valve is connected among the main oil way, the oil outlet of the electronic oil pump and the oil inlet of the cooling and lubricating oil way of the vehicle, and the pressure switch valve is used for controlling the connection or disconnection between the electronic oil pump and the cooling and lubricating oil way of the vehicle.
2. The hydraulic oil supply system of a transmission according to claim 1, wherein the pressure control device includes a pressure control solenoid valve and a pressure control spool valve, the pressure control spool valve being connected between the main oil passage, an oil inlet of the mechanical oil pump, and an oil inlet of a cooling lubrication oil passage of a vehicle;
the pressure control electromagnetic valve is used for controlling the valve core of the pressure control slide valve to slide, so that the main oil way is communicated or disconnected with the oil inlet of the mechanical oil pump and the oil inlet of the cooling and lubricating oil way of the vehicle.
3. The hydraulic oil supply system of a transmission according to claim 2, wherein the pressure control spool is provided with a first oil inlet, a first oil outlet, and a second oil outlet, the first oil inlet communicating with the main oil passage, the first oil outlet communicating with the oil inlet of the mechanical oil pump, and the second oil outlet communicating with the oil inlet of the cooling lubrication oil passage;
the valve core of the pressure control slide valve is provided with a first position, a second position and a third position;
when the pressure control electromagnetic valve is powered off, the valve core of the pressure control slide valve is at a first position, the first oil inlet is disconnected with the first oil outlet, and the first oil inlet is disconnected with the second oil outlet;
when the pressure control electromagnetic valve is electrified, the valve core of the pressure control slide valve slides to a second position or a third position from a first position; in the second position, the first oil inlet is disconnected from the first oil outlet, and the first oil inlet is communicated with the second oil outlet; in the third position, the first oil inlet is communicated with the first oil outlet, and the first oil inlet is communicated with the second oil outlet.
4. The hydraulic oil supply system of a transmission according to claim 3, wherein the pressure control spool is further provided with a first control end and a feedback end, the feedback end being communicated with the main oil passage;
the pressure control electromagnetic valve is provided with a second oil inlet, a third oil outlet and a first pressure relief opening communicated with the oil tank, the second oil inlet is communicated with the main oil way, the second oil inlet is communicated with the third oil outlet, and the third oil outlet is communicated with the first control end;
when the pressure control electromagnetic valve is powered off, the second oil inlet is disconnected with the first pressure relief opening, and a valve core of the pressure control slide valve is located at a first position;
when the pressure control electromagnetic valve is electrified, the second oil inlet is communicated with the first pressure relief opening, so that the valve core of the pressure control slide valve slides to a second position or a third position from a first position.
5. The hydraulic oil supply system of a transmission according to claim 4, further comprising a pressure-stabilizing accumulator connected between the pressure-control solenoid valve and the pressure-control spool valve, the pressure-stabilizing accumulator being configured to stabilize the oil flowing from the pressure-control solenoid valve to the pressure-control spool valve.
6. The hydraulic oil supply system of the transmission according to claim 1, wherein a second control end, a third oil inlet and a fourth oil outlet are provided on the pressure switch valve, the second control end is communicated with the main oil path, the third oil inlet is communicated with an oil outlet of the electronic oil pump, and the fourth oil outlet is communicated with an oil inlet of the cooling and lubricating oil path;
when the oil pressure in the main oil way is greater than a first preset value, the second control end controls the third oil inlet to be communicated with the fourth oil outlet;
and when the oil pressure in the main oil way is smaller than a first preset value, the second control end controls the third oil inlet to be disconnected with the fourth oil outlet.
7. The hydraulic oil supply system of a transmission of claim 6, further comprising a first check valve, a second check valve, a third check valve, and a fourth check valve, an oil inlet of the first check valve being in communication with an oil outlet of the mechanical oil pump, an oil outlet of the first check valve being in communication with the main oil passage;
an oil inlet of the second one-way valve is communicated with the oil tank, and an oil outlet of the second one-way valve is communicated with an oil inlet of the electronic oil pump;
an oil inlet of the third one-way valve is communicated with an oil outlet of the electronic oil pump, and an oil outlet of the third one-way valve is communicated with the main oil way;
an oil inlet of the fourth one-way valve is communicated with an oil outlet of the electronic oil pump, and an oil outlet of the fourth one-way valve is communicated with the third oil inlet.
8. The hydraulic oil supply system of the transmission according to claim 1, further comprising an oil suction filter, wherein an oil inlet of the oil suction filter is communicated with the oil tank, an oil outlet of the oil suction filter is communicated with an oil inlet of the mechanical oil pump and an oil inlet of the electronic oil pump, and the oil suction filter is configured to filter oil.
9. The hydraulic oil supply system of a transmission according to claim 1, further comprising a relief valve provided with a fourth oil inlet port communicating with the main oil passage and a second relief port communicating with the oil tank;
when the oil pressure in the main oil way is greater than a second preset value, the fourth oil inlet is communicated with the second pressure relief opening;
and when the oil pressure in the main oil way is smaller than a second preset value, the fourth oil inlet is disconnected with the second pressure relief opening.
10. The hydraulic oil supply system of a transmission of claim 1, further comprising a pressure sensor for sensing an oil pressure within the main oil passage.
CN202010108091.6A 2020-02-21 2020-02-21 Hydraulic oil supply system of transmission Active CN113294516B (en)

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