CN110966400A - Gearbox hydraulic control system and vehicle - Google Patents
Gearbox hydraulic control system and vehicle Download PDFInfo
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- CN110966400A CN110966400A CN201911251072.2A CN201911251072A CN110966400A CN 110966400 A CN110966400 A CN 110966400A CN 201911251072 A CN201911251072 A CN 201911251072A CN 110966400 A CN110966400 A CN 110966400A
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- proportional solenoid
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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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/08—Multiple final output mechanisms being moved by a single common final actuating mechanism
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D48/00—External control of clutches
- F16D48/02—Control by fluid pressure
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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
- F16H61/0021—Generation or control of line pressure
- F16H61/0025—Supply of control fluid; Pumps therefore
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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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/3023—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by fluid pressure
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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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/34—Locking or disabling mechanisms
- F16H63/3416—Parking lock mechanisms or brakes in the transmission
- F16H63/3483—Parking lock mechanisms or brakes in the transmission with hydraulic actuating means
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D48/00—External control of clutches
- F16D48/02—Control by fluid pressure
- F16D2048/0203—Control by fluid pressure with an accumulator; Details thereof
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D48/00—External control of clutches
- F16D48/02—Control by fluid pressure
- F16D2048/0221—Valves for clutch control systems; Details thereof
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D48/00—External control of clutches
- F16D48/02—Control by fluid pressure
- F16D2048/0227—Source of pressure producing the clutch engagement or disengagement action within a circuit; Means for initiating command action in power assisted devices
- F16D2048/0233—Source of pressure producing the clutch engagement or disengagement action within a circuit; Means for initiating command action in power assisted devices by rotary pump actuation
- F16D2048/0245—Electrically driven rotary pumps
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D48/00—External control of clutches
- F16D48/02—Control by fluid pressure
- F16D2048/0257—Hydraulic circuit layouts, i.e. details of hydraulic circuit elements or the arrangement thereof
- F16D2048/0287—Hydraulic circuits combining clutch actuation and other hydraulic systems
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/10—System to be controlled
- F16D2500/102—Actuator
- F16D2500/1026—Hydraulic
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/30—Signal inputs
- F16D2500/302—Signal inputs from the actuator
- F16D2500/3024—Pressure
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/70—Details about the implementation of the control system
- F16D2500/704—Output parameters from the control unit; Target parameters to be controlled
- F16D2500/70402—Actuator parameters
- F16D2500/70406—Pressure
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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
- F16H61/0021—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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention provides a gearbox hydraulic control system and a vehicle, and relates to the field of vehicles. The hydraulic control system of the gearbox comprises a high-pressure main oil way, a first high-pressure branch oil way and a second high-pressure branch oil way, a low-pressure oil way and a control unit, wherein the high-pressure main oil way is formed by sequentially connecting an oil tank, a suction filter, an electronic duplex pump, a high-pressure filter press and an energy accumulator, the first high-pressure branch oil way and the second high-pressure branch oil way are formed by respectively connecting a first pressure proportion electromagnetic valve and a second pressure proportion electromagnetic valve with the energy accumulator, and the low-pressure. The control unit is used for controlling the oil output of the first pressure proportional solenoid valve so as to adjust the oil pressure of the first high-pressure branch oil circuit to realize the parking or parking of the parking system, and controlling the oil output of the second pressure proportional solenoid valve so as to adjust the oil pressure of the second high-pressure branch oil circuit to realize the engagement or disengagement of the clutch. The invention can realize high-precision control and improve the overall working efficiency of the hydraulic system.
Description
Technical Field
The invention relates to the field of vehicles, in particular to a hydraulic control system of a gearbox and a vehicle.
Background
The hydraulic control system adjusts the flow direction and pressure of hydraulic oil through a control valve, so that the hydraulic oil is used for driving a hydraulic element to perform different functional operations. The control valve of the hydraulic system is structurally divided into two categories of an electromagnetic valve and a mechanical valve, and functionally divided into two categories of a pilot valve and a direct drive valve. Through the cooperation of pilot valve and direct drive valve, hydraulic system can eliminate the fluid pressure fluctuation that the oil pump was pumped to realize the steady control to transmission system, also have the control accuracy height simultaneously, advantage that response time is fast. In addition, the hydraulic system can also realize the lubrication/cooling of hydraulic elements and transmission system components, thereby prolonging the service life of the transmission system.
Gearbox hydraulic system among the prior art is mostly low-pressure system, and the cooperation mechanical oil pump uses, and at response time, the system leaks the leakage quantity, exists not enoughly in the control accuracy.
Disclosure of Invention
The invention aims to provide a hydraulic control system of a gearbox, which solves the defects of response time, system leakage and control precision of the hydraulic control system of the gearbox in the prior art.
It is a further object of the first aspect of the invention to improve the safety of the high-pressure main oil passage.
It is an object of a second aspect of the invention to provide a vehicle.
According to the object of the first aspect of the invention, the invention provides a hydraulic control system of a gearbox, which comprises a high-pressure main oil way, a main oil tank, a suction filter, an electronic duplex pump, a high-pressure filter press and an accumulator are sequentially connected,
further comprising:
one end of the first pressure proportional solenoid valve is connected with the energy accumulator, the other end of the first pressure proportional solenoid valve is used for being connected with a parking system so as to form a first high-pressure branch oil path, one end of the second pressure proportional solenoid valve is connected with the energy accumulator, and the other end of the second pressure proportional solenoid valve is used for being connected with a clutch so as to form a second high-pressure branch oil path;
the oil cooler is connected with the electronic duplex pump so as to form a low-pressure oil way, and oil in the low-pressure oil way flows to a cooling channel of the vehicle and is used for cooling and lubricating all parts of the vehicle;
and the control unit is connected with the first pressure proportional solenoid valve and the second pressure proportional solenoid valve and is used for controlling the oil outlet quantity of the first pressure proportional solenoid valve so as to adjust the oil pressure of the first high-pressure branch oil way to realize the parking or parking of the parking system and controlling the oil outlet quantity of the second pressure proportional solenoid valve so as to adjust the oil pressure of the second high-pressure branch oil way to realize the engagement or the disengagement of the clutch.
Optionally, the first high-pressure branch oil circuit further comprises a first pressure sensor, the first pressure sensor is connected between the first pressure proportional solenoid valve and the parking system in series and is connected with the control unit, and the first pressure sensor is used for detecting the oil pressure of the first high-pressure branch oil circuit and feeding back the oil pressure to the control unit;
the second high-pressure branch oil circuit further comprises a second pressure sensor, and the second pressure sensor is connected between the second pressure proportional solenoid valve and the clutch in series, is connected with the control unit, and is used for detecting the oil pressure of the second high-pressure branch oil circuit and feeding back the oil pressure to the control unit.
Optionally, the high-pressure main oil passage further includes:
a first check valve disposed between the high pressure filter press and the accumulator to allow the oil to flow to the accumulator in a single direction.
Optionally, the high-pressure main oil passage further includes:
a relief valve disposed between the first check valve and the high-pressure filter press, the relief valve configured to open to reduce the oil pressure of the high-pressure main oil passage when the oil pressure of the high-pressure main oil passage is greater than a first preset threshold pressure.
Optionally, the method further comprises:
the switching solenoid valve is configured to be opened when the oil pressure of the high-pressure main oil way is greater than a second preset threshold pressure so that oil in the high-pressure main oil way flows to the low-pressure oil way to reduce the oil pressure of the high-pressure main oil way, wherein the second preset threshold pressure is less than the first preset threshold pressure.
Optionally, a main oil line pressure sensor is arranged on the high-pressure main oil line, and the main oil line pressure sensor is used for detecting the oil pressure of the high-pressure main oil line.
Optionally, the high-pressure main oil passage further includes:
a second check valve connected in parallel with the high pressure filter press, the second check valve configured to open to allow oil in the high pressure main line to flow to the accumulator in one direction when a differential pressure across the high pressure filter press is detected to be greater than a third preset threshold pressure.
Optionally, one end of the main oil path pressure sensor is connected to the accumulator, and the other end of the main oil path pressure sensor is connected to both the first pressure proportional solenoid valve and the second pressure proportional solenoid valve.
Optionally, the electronic twin pump comprises a high pressure pump and a low pressure pump in parallel.
According to the object of the second aspect of the invention, the invention also provides a vehicle which is provided with the hydraulic control system of the gearbox.
According to the invention, the control unit is used for controlling the first pressure proportional solenoid valve and the second pressure proportional solenoid valve, so that the control precision of the hydraulic control system of the transmission can be improved, the accurate control of the clutch and the parking system is realized, and the accumulator is arranged on the high-pressure main oil way, so that the oil pressure in the high-pressure main oil way can be maintained within a certain range, and the oil pressure supplied to the first high-pressure branch oil way and the second high-pressure branch oil way is ensured. The hydraulic component is controlled by the high-pressure system, so that the response time is fast and the efficiency is high. Meanwhile, because the electronic duplex pump is adopted to supply oil, the low-pressure oil circuit can meet the requirement of a cooling/lubricating system on large flow.
Further, a relief valve is arranged between the first check valve and the high-pressure filter press, and the relief valve is configured to be opened when the oil pressure of the high-pressure main oil way is greater than a first preset threshold pressure so as to reduce the oil pressure of the high-pressure main oil way and protect the high-pressure oil way and each hydraulic component. In addition, the high-pressure filter press is connected with the second one-way valve in parallel, and when the high-pressure filter press breaks down, oil can flow to the energy accumulator through the second one-way valve, so that the normal operation of a hydraulic control system of the gearbox is ensured.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic block diagram of a transmission hydraulic control system according to one embodiment of the present invention;
FIG. 2 is a schematic flow diagram of a high pressure oil circuit in the transmission hydraulic control system shown in FIG. 1;
fig. 3 is a schematic flow diagram of a low pressure oil circuit in the transmission hydraulic control system shown in fig. 1.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Fig. 1 is a schematic configuration diagram of a transmission hydraulic control system according to an embodiment of the present invention, fig. 2 is a schematic flow diagram of a high-pressure oil passage in the transmission hydraulic control system shown in fig. 1, and fig. 3 is a schematic flow diagram of a low-pressure oil passage in the transmission hydraulic control system shown in fig. 1. As shown in fig. 1-3, wherein the direction of arrows in fig. 2 and 3 indicate the flow direction of oil, in a specific embodiment, the hydraulic control system of the transmission may generally include a high-pressure main oil path sequentially connected by the oil tank 1, the suction filter 2, the electronic duplex pump 3, the high-pressure filter press 4 and the accumulator 7, and further include a first pressure proportional solenoid valve 11 and a second pressure proportional solenoid valve 12, wherein one end of the first pressure proportional solenoid valve 11 is connected with the accumulator 7, the other end is used for being connected with the parking system 16 to form a first high-pressure branch oil path, and one end of the second pressure proportional solenoid valve 12 is connected with the accumulator 7, and the other end is used for being connected with the clutch 17 to form a second high-pressure branch oil path. And the oil cooler 15 is connected with the electronic duplex pump 3 to form a low-pressure oil path, and oil in the low-pressure oil path flows to a cooling channel of the vehicle and is used for cooling and lubricating all parts of the vehicle. Here, the oil in the low pressure oil path flows to the cooling passages 18 at different portions of the vehicle through orifices of different sizes, and the control unit 19 is connected to both the first pressure proportional solenoid valve 11 and the second pressure proportional solenoid valve 12, and is used for controlling the oil output of the first pressure proportional solenoid valve 11 so as to adjust the oil pressure of the first high pressure branch oil path to realize the parking or parking of the parking system 16, and controlling the oil output of the second pressure proportional solenoid valve 12 so as to adjust the oil pressure of the second high pressure branch oil path to realize the engagement or disengagement of the clutch 17.
In the invention, the control unit 19 is used for controlling the first pressure proportional solenoid valve 11 and the second pressure proportional solenoid valve 12, the control precision of a hydraulic control system of the transmission can be improved, so that the clutch 17 and the parking system 16 can be accurately controlled, and the accumulator 7 arranged on the high-pressure main oil way can maintain the oil pressure in the high-pressure main oil way within a certain range, so that the oil pressure supplied to the first high-pressure branch oil way and the second high-pressure branch oil way is ensured. The hydraulic component is controlled by the high-pressure system, so that the response time is fast and the efficiency is high. Meanwhile, as the electronic duplex pump 3 is adopted to supply oil, the low-pressure oil circuit can meet the requirement of a cooling/lubricating system on large flow.
Further, the first high-pressure branch oil circuit further comprises a first pressure sensor 13, and the first pressure sensor 13 is connected in series between the first pressure proportional solenoid valve 11 and the parking system 16 and is connected with the control unit 19, and is used for detecting the oil pressure of the first high-pressure branch oil circuit and feeding back the oil pressure to the control unit 19. The second high-pressure branch oil path further comprises a second pressure sensor 14, and the second pressure sensor 14 is connected between the second pressure proportional solenoid valve 12 and the clutch 17 in series and is connected with the control unit 19, and is used for detecting the oil pressure of the second high-pressure branch oil path and feeding back the oil pressure to the control unit 19. Specifically, the first pressure proportional solenoid valve 11 and the second pressure proportional solenoid valve 12 are both normal-low pressure proportional control solenoid valves, the first pressure sensor 13 is a parking solenoid valve pressure sensor, the second pressure sensor 14 is a clutch 17 solenoid valve pressure sensor, and the normal-low pressure proportional control solenoid valves can control the opening size through current signals to control the execution end pressure of the clutch 17 and the parking system 16, so that the actions of engaging/disengaging the clutch 17, parking/parking the parking system 16 and the like are realized.
According to the invention, the pressure sensor is arranged on the high-pressure branch oil way, the detected oil pressure is fed back to the control unit 19, and the control unit 19 adjusts the oil output quantity of the high-pressure proportional solenoid valve in real time according to the oil pressure of the high-pressure branch oil way, so that the parking system 16 and the clutch 17 can be controlled more accurately.
Specifically, the high-pressure main oil passage further includes a first check valve 6 provided between the high-pressure filter press 4 and the accumulator 7 to make the oil flow to the accumulator 7 in a single direction. The first check valve 6 is arranged, so that oil in the high-pressure main oil way can be prevented from flowing back, and oil pressure loss is avoided.
In another embodiment, the high pressure main oil circuit further comprises a pressure relief valve 5 arranged between the first check valve 6 and the high pressure filter press 4, the pressure relief valve 5 being configured to open to reduce the oil pressure of the high pressure main oil circuit when the oil pressure of the high pressure main oil circuit is greater than a first preset threshold pressure. Here, the relief valve 5 is a mechanical hydraulic slide valve, and when the oil pressure of the high-pressure main oil line is greater than a first preset threshold pressure for various reasons, the mechanical hydraulic slide valve is automatically opened to release the pressure, so that the oil in the high-pressure main oil line is directly released to the transmission case to protect the high-pressure oil line and each hydraulic component, and the mechanical hydraulic slide valve is automatically closed when the oil pressure of the high-pressure main oil line is not greater than the first preset threshold pressure.
In addition, a switch solenoid valve 9 is further included for connecting the high-pressure main oil passage with the low-pressure oil passage, the switch solenoid valve 9 being configured to open when the oil pressure of the high-pressure main oil passage is greater than a second preset threshold pressure, which is less than the first preset threshold pressure, to cause the oil in the high-pressure main oil passage to flow to the low-pressure oil passage, thereby reducing the oil pressure of the high-pressure main oil passage. The switching electromagnetic valve 9 in the invention can lead the redundant oil in the high-pressure main oil circuit into the oil cooler 15 and enter the cooling channel 18 of the vehicle together with the oil in the low-pressure oil circuit for cooling and lubricating. The electronic double pump 3 can be operated with a relatively low load, and the efficiency and the service life of the electronic double pump 3 are improved.
Specifically, a main oil line pressure sensor 8 is arranged on the high-pressure main oil line, and the main oil line pressure sensor 8 is used for detecting the oil pressure of the high-pressure main oil line and feeding the oil pressure back to the switching solenoid valve 9 so that the switching solenoid valve 9 is opened or closed according to the oil pressure of the high-pressure main oil line.
In a preferred embodiment, the high-pressure main circuit further comprises a second check valve 10 connected in parallel with the high-pressure filter press 4, the second check valve 10 being configured to open to allow unidirectional flow of oil in the high-pressure main circuit to the accumulator 7 upon detection of a pressure difference across the high-pressure filter press 4 greater than a third preset threshold pressure. The second check valve 10 can ensure the oil pressure of the high-pressure main oil way when the high-pressure filter press 4 is in failure or damaged, so that the hydraulic control system of the gearbox can normally operate.
Further, one end of the main oil path pressure sensor 8 is connected with the accumulator 7, and the other end is connected with both the first pressure proportional solenoid valve 11 and the second pressure proportional solenoid valve 12.
The electronic duplex pump 3 comprises a high-pressure pump and a low-pressure pump which are connected in parallel, and can adjust the pressure and the flow of different oil liquid by utilizing different rotating speeds. The oil pressure in the high-pressure oil line is maintained by the accumulator 7, and when the oil pressure in the high-pressure oil line reaches a predetermined pressure, the accumulator 7 maintains the pressure of the first pressure proportional solenoid valve 11 and the second pressure proportional solenoid valve 12, and the first check valve 6 prevents the oil from flowing back to cause pressure loss. At this time, the oil in the high-pressure oil path is discharged to the oil cooler 15 by opening the on-off solenoid valve 9, and is cooled and lubricated together with the oil in the low-pressure oil path. This enables the electronic twin pump 3 to operate at a lower load, improving efficiency and life.
The invention also provides a vehicle which is provided with the hydraulic control system of the gearbox in any one of the embodiments, and the hydraulic control system of the gearbox is not described in detail herein.
According to the invention, through the design of the hydraulic system, high-precision control can be realized, and the integral working efficiency of the hydraulic system is improved while cooling and lubricating are integrated.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. A hydraulic control system of a gearbox is characterized by comprising a high-pressure main oil way which is formed by sequentially connecting an oil tank, a suction filter, an electronic duplex pump, a high-pressure filter press and an energy accumulator,
further comprising:
one end of the first pressure proportional solenoid valve is connected with the energy accumulator, the other end of the first pressure proportional solenoid valve is used for being connected with a parking system so as to form a first high-pressure branch oil path, one end of the second pressure proportional solenoid valve is connected with the energy accumulator, and the other end of the second pressure proportional solenoid valve is used for being connected with a clutch so as to form a second high-pressure branch oil path;
the oil cooler is connected with the electronic duplex pump so as to form a low-pressure oil way, and oil in the low-pressure oil way flows to a cooling channel of the vehicle and is used for cooling and lubricating all parts of the vehicle;
and the control unit is connected with the first pressure proportional solenoid valve and the second pressure proportional solenoid valve and is used for controlling the oil outlet quantity of the first pressure proportional solenoid valve so as to adjust the oil pressure of the first high-pressure branch oil way to realize the parking or parking of the parking system and controlling the oil outlet quantity of the second pressure proportional solenoid valve so as to adjust the oil pressure of the second high-pressure branch oil way to realize the engagement or the disengagement of the clutch.
2. The transmission hydraulic control system of claim 1,
the first high-pressure branch oil circuit further comprises a first pressure sensor, the first pressure sensor is connected between the first pressure proportional solenoid valve and the parking system in series and is connected with the control unit, and the first pressure sensor is used for detecting the oil pressure of the first high-pressure branch oil circuit and feeding back the oil pressure to the control unit;
the second high-pressure branch oil circuit further comprises a second pressure sensor, and the second pressure sensor is connected between the second pressure proportional solenoid valve and the clutch in series, is connected with the control unit, and is used for detecting the oil pressure of the second high-pressure branch oil circuit and feeding back the oil pressure to the control unit.
3. The transmission hydraulic control system of claim 1, wherein the high pressure main oil passage further comprises:
a first check valve disposed between the high pressure filter press and the accumulator to allow the oil to flow to the accumulator in a single direction.
4. The transmission hydraulic control system of claim 3, wherein the high pressure main oil passage further comprises:
a relief valve disposed between the first check valve and the high-pressure filter press, the relief valve configured to open to reduce the oil pressure of the high-pressure main oil passage when the oil pressure of the high-pressure main oil passage is greater than a first preset threshold pressure.
5. The transmission hydraulic control system of claim 4, further comprising:
the switching solenoid valve is configured to be opened when the oil pressure of the high-pressure main oil way is greater than a second preset threshold pressure so that oil in the high-pressure main oil way flows to the low-pressure oil way to reduce the oil pressure of the high-pressure main oil way, wherein the second preset threshold pressure is less than the first preset threshold pressure.
6. The transmission hydraulic control system of claim 1,
and a main oil way pressure sensor is arranged on the high-pressure main oil way and is used for detecting the oil pressure of the high-pressure main oil way.
7. The transmission hydraulic control system of claim 1, wherein the high pressure main oil passage further comprises:
a second check valve connected in parallel with the high pressure filter press, the second check valve configured to open to allow oil in the high pressure main line to flow to the accumulator in one direction when a differential pressure across the high pressure filter press is detected to be greater than a third preset threshold pressure.
8. The transmission hydraulic control system of claim 6,
one end of the main oil way pressure sensor is connected with the energy accumulator, and the other end of the main oil way pressure sensor is connected with the first pressure proportional solenoid valve and the second pressure proportional solenoid valve.
9. The transmission hydraulic control system of claim 1,
the electronic twin pump includes a high pressure pump and a low pressure pump connected in parallel.
10. A vehicle, characterized in that a gearbox hydraulic control system according to any one of claims 1-9 is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911251072.2A CN110966400A (en) | 2019-12-09 | 2019-12-09 | Gearbox hydraulic control system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN112178184A (en) * | 2020-10-15 | 2021-01-05 | 中国第一汽车股份有限公司 | Hydraulic control system of automatic transmission |
| CN112283330A (en) * | 2020-11-18 | 2021-01-29 | 海马汽车有限公司 | Hybrid power transmission hydraulic system and vehicle |
| CN112896357A (en) * | 2021-03-30 | 2021-06-04 | 郑州宇通重工有限公司 | Wheel-foot composite movable mechanical equipment and hydraulic system thereof |
| CN113606265A (en) * | 2021-08-13 | 2021-11-05 | 安徽江淮汽车集团股份有限公司 | Clutch control system of hybrid power transmission |
| CN114151541A (en) * | 2021-12-01 | 2022-03-08 | 中国第一汽车股份有限公司 | Automatic transmission hydraulic control device and vehicle |
| CN114352659A (en) * | 2021-11-09 | 2022-04-15 | 苏州瑞赛精密工具有限公司 | Double-pump hydraulic system of 2AT transmission |
| US20230193995A1 (en) * | 2020-05-11 | 2023-06-22 | Schaeffler Technologies AG & Co. KG | Hydraulic parking lock actuator module |
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