WO2022078478A1 - Dispositif de commande hydraulique pour transmission automatique - Google Patents

Dispositif de commande hydraulique pour transmission automatique Download PDF

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Publication number
WO2022078478A1
WO2022078478A1 PCT/CN2021/123980 CN2021123980W WO2022078478A1 WO 2022078478 A1 WO2022078478 A1 WO 2022078478A1 CN 2021123980 W CN2021123980 W CN 2021123980W WO 2022078478 A1 WO2022078478 A1 WO 2022078478A1
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WO
WIPO (PCT)
Prior art keywords
oil
pressure
valve
chamber
port
Prior art date
Application number
PCT/CN2021/123980
Other languages
English (en)
Chinese (zh)
Inventor
毛泽贤
唐立中
赵雪松
赵健涛
宋建军
梅相楠
赵慧超
康志军
刘振宇
Original Assignee
中国第一汽车股份有限公司
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Publication of WO2022078478A1 publication Critical patent/WO2022078478A1/fr

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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
    • 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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • 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
    • 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
    • F15B21/042—Controlling the temperature of the fluid
    • F15B21/0423—Cooling
    • 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
    • F16H61/02—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 characterised by the signals used
    • F16H61/0202—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 characterised by the signals used the signals being electric
    • F16H61/0204—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 characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
    • F16H61/0206—Layout of electro-hydraulic control circuits, e.g. arrangement of valves
    • 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
    • F16H61/02—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 characterised by the signals used
    • F16H61/0262—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 characterised by the signals used the signals being hydraulic
    • F16H61/0265—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 characterised by the signals used the signals being hydraulic for gearshift control, e.g. control functions for performing shifting or generation of shift signals
    • 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
    • F16H61/02—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 characterised by the signals used
    • F16H61/0262—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 characterised by the signals used the signals being hydraulic
    • F16H61/0265—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 characterised by the signals used the signals being hydraulic for gearshift control, e.g. control functions for performing shifting or generation of shift signals
    • F16H61/0267—Layout of hydraulic control circuits, e.g. arrangement of valves
    • 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
    • F16H63/3408—Locking or disabling mechanisms the locking mechanism being moved by the final actuating mechanism
    • 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

Definitions

  • the present application relates to the technical field of hydraulic control of automatic transmissions, for example, to a hydraulic control system of automatic transmissions.
  • the hydraulic control system of the automatic transmission usually adopts a locking solenoid valve, at least one pressure regulating solenoid valve and multiple mechanical valves.
  • the additional at least two solenoid valves not only The cost of the system is increased, and more ports of the automatic transmission control unit are occupied, which increases the difficulty of control.
  • the present application provides a hydraulic control system for an automatic transmission, which solves the problems of high system cost and difficult control caused by the large number of solenoid valves in the related art.
  • a hydraulic control system for an automatic transmission comprising: a pilot pressure regulating valve; a gear operation structure, including a pressure regulating valve; a parking lock structure, including an oil inlet slide valve, an oil discharge slide valve and a parking lock assembly,
  • the vehicle locking assembly includes a push piece, a stop piece, a housing with a cavity, and a parking piece, the parking piece is connected with the push piece, and the housing is provided with a connection with the cavity.
  • a first communication port and a second communication port, part of the pusher extends into the chamber and divides the chamber into a first chamber and a second chamber, the stopper is provided on the first chamber
  • the first oil inlet cavity of the oil inlet spool valve is communicated with the pilot pressure regulating valve
  • the first oil inlet of the oil inlet spool valve can be communicated with the pressure regulating valve
  • the oil inlet spool valve is provided with
  • There are a first working oil port and a first oil return port and the oil in the first oil inlet chamber can push the oil inlet piston of the oil inlet spool valve to make the first working oil port and the first return port.
  • the oil port or the first oil inlet is communicated, and the first working oil port can be communicated with the first communication port and the first oil discharge cavity of the oil discharge spool valve, and the second inlet of the oil discharge spool valve.
  • the oil port can be communicated with the pipeline between the pressure regulating valve and the first oil inlet, the second communication port is communicated with the second working oil port of the oil discharge spool valve, and the first oil discharge
  • the oil in the cavity can push the oil discharge piston of the oil discharge spool valve to make the second working oil port communicate with the second oil return port or the second oil inlet port of the oil discharge spool valve, and the first
  • the oil in a chamber can push the stopper to move in a first direction to make the stopper abut or disengage from the pusher, and the oil in the second chamber can push the pusher
  • the parking element is moved in a second direction to make the parking piece abut or disengage from the parking pawl, and the second direction and the first direction are arranged at an
  • the parking lock structure further includes a first check valve and a pressure maintaining valve, and the inlet of the first check valve is communicated with the first working oil port,
  • the outlet of the first check valve is communicated with the first oil discharge chamber and the first pressure keeping chamber of the pressure keeping valve, the inlet of the pressure keeping valve is communicated with the outlet of the pressure regulating valve, the The outlet of the pressure-holding valve is communicated with the second oil inlet.
  • the first check valve is opened, the oil discharged from the first working oil port enters the first row through the first check valve.
  • the oil chamber and the first pressure maintaining chamber, the oil discharged from the outlet of the pressure regulating valve can pass through the pressure maintaining valve, the second oil inlet, the second working oil port, and the second The communication port enters the second chamber.
  • the number of the pressure regulating valves is two, and the two pressure regulating valves are a first pressure regulating valve and a second pressure regulating valve respectively, and the parking lock structure It also includes a shuttle valve, the two inlets of the shuttle valve are respectively communicated with the first pressure regulating valve and the second pressure regulating valve, and the outlet of the shuttle valve is respectively connected with the first oil inlet and the second pressure regulating valve. The inlet of the pressure-retaining valve is connected.
  • the parking lock assembly includes: a reset elastic piece, the reset elastic piece is located in the first chamber, one end of the reset elastic piece is connected with the housing, and the other end is connected with the stop piece, so When the stopper is separated from the pusher, the reset elastic piece is compressed, and the reset elastic piece can reset the stopper, so that the limiting protrusion is located in the groove or the stopper is located.
  • the moving piece is in contact with the end face of the pushing piece; an elastic piece is loaded, the elastic loading piece is sleeved on the pushing piece and is located outside the casing, and one end of the elastic loading piece is connected to the casing connected, the other end is connected to the pusher or the pusher, when the parking member is separated from the parking pawl, the loading elastic member is compressed, and the loading elastic member can push the pusher moving in the second direction, so that the pushing member drives the parking member to abut against the parking pawl.
  • the elastic force of the restoring elastic member is a first pressure when the stopper is separated from the pushing member, and the first pressure is the first pressure when the first check valve is opened.
  • the difference between the inlet and outlet pressures of the check valve is the second pressure, and the second pressure is greater than the first pressure; when the limiting protrusion is located in the groove, the elastic force of the loading elastic member is the first pressure.
  • the third pressure is greater than the first pressure, when the inlet and outlet of the pressure maintaining valve are connected, the elastic force of the pressure maintaining elastic member of the pressure maintaining valve is the fourth pressure, and the fourth pressure is lower than the the third pressure.
  • the parking lock assembly further includes a bushing, the bushing is located in the second chamber, and the pushing member is in sealing and sliding connection with the bushing, so
  • the pusher divides the second chamber into an isolated exhaust chamber and an oil-liquid chamber, and a third communication port is also provided on the housing, and the third communication port communicates with the exhaust chamber , the second communication port communicates with the oil chamber.
  • the parking lock structure further includes a first oil tank and a second oil tank, the first oil tank is communicated with the first oil return port, and the second oil tank is connected to the first oil tank.
  • the second oil return port is communicated.
  • the hydraulic control system of the automatic transmission further includes a low-pressure cooling and lubricating structure
  • the low-pressure cooling and lubricating structure includes a first oil tank, a high-pressure oil pump, a high-pressure filter, a second A check valve and an accumulator
  • the low-pressure cooling and lubricating structure further comprises a switching valve, the inlet of the switching valve is communicated with the pipeline between the high-pressure filter and the second check valve, the switching valve
  • the second check valve can be opened, and the high-pressure oil pump can charge the accumulator; when the switching valve is energized, the high-pressure oil pump can pass the oil in the first oil tank through The switching valve is pumped out, the high-pressure oil pump is depressurized, the second check valve is in a closed state, and the accumulator maintains pressure.
  • the low-pressure cooling and lubricating structure further includes a second oil tank, a low-pressure oil pump, a cooler, and a low-pressure filter connected in sequence, and the outlet of the low-pressure filter is connected to the cooling pipeline and the lubricating oil.
  • the pipelines are connected, and one of the cooling pipeline and the lubricating pipeline is provided with a flow regulating valve, and the flow regulating valve is connected with the pilot pressure regulating valve.
  • FIG. 1 is a partial schematic diagram of a hydraulic control system of an automatic transmission provided by an embodiment of the present application
  • FIG. 2 is a schematic diagram of a hydraulic control system of an automatic transmission provided by an embodiment of the present application.
  • the terms “center”, “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “inner”, “outer” etc. refer to the orientation or position The relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore It should not be construed as a limitation on this application. Furthermore, the terms “first” and “second” are used for descriptive purposes only and should not be construed to indicate or imply relative importance. Therein, the terms “first position” and “second position” are two different positions.
  • connection should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection; it may be a mechanical connection, It can also be an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or an internal connection between two components.
  • connection should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection; it may be a mechanical connection, It can also be an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or an internal connection between two components.
  • the present embodiment provides a hydraulic control system for an automatic transmission, including a pilot pressure regulating valve 1 , a gear operating structure and a parking lock structure.
  • the gear operating structure includes a pressure regulating valve
  • the vehicle locking structure includes an oil inlet spool valve 31, an oil discharge spool valve 32 and a parking lock assembly 33.
  • the parking lock assembly 33 includes a pusher 331, a stopper 332, a housing 333 with a chamber and a parking element 334, the parking member 334 is connected with the push member 331, the housing 333 is provided with a first communication port 33301 and a second communication port 33302 that communicate with the chamber, and part of the push member 331 extends into the chamber and divides the chamber into a first communication port 33301 and a second communication port 33302.
  • a chamber 33303 and a second chamber 33304, the stopper 332 is arranged in the first chamber 33303, the first inlet chamber of the oil inlet spool valve 31 is communicated with the pilot pressure regulating valve 1, and the first inlet of the oil inlet spool valve 31 is communicated with the pilot pressure regulating valve 1.
  • the oil port can be communicated with the pressure regulating valve, the oil inlet spool valve 31 is provided with a first working oil port and a first oil return port, and the oil in the first oil inlet chamber can push the oil inlet piston of the oil inlet spool valve 31 to make the first oil inlet
  • a working oil port is communicated with the first oil return port or the first oil inlet port, and the first working oil port can be communicated with the first communication port 33301 and the first oil discharge cavity of the oil discharge slide valve 32 respectively.
  • the second oil inlet can be communicated with the pipeline between the pressure regulating valve and the first oil inlet
  • the second communication port 33302 can be communicated with the second working oil port of the oil discharge slide valve 32
  • the oil in the first oil discharge chamber can Push the oil discharge piston of the oil discharge spool valve 32 to make the second working oil port communicate with the second oil return port or the second oil inlet port of the oil discharge spool valve 32
  • the oil in the first chamber 33303 can push the stopper 332 Moving in the first direction to make the stopper 332 abut or disengage from the pusher 331
  • the oil in the second chamber 33304 can push the pusher 331 to move in the second direction to make the parking member 334 and the parking pawl Abutting or disengaging
  • the second direction and the first direction are arranged at an included angle.
  • the push member 331 includes a push rod and a piston.
  • the piston is fixedly mounted on the push rod and can be sealed and slidably connected to the inner wall of the chamber.
  • a joint is provided on the pipeline between the second discharge port of the oil drain slide valve 32 and the second chamber 33304.
  • the additional orifice can control the movement speed of the pusher 331 to prevent the speed from hitting the housing 333 too fast to generate noise.
  • the dashed lines in Figures 1 and 2 represent the hydraulic pipelines that control each valve, and the working state of each valve is changed by adjusting the pressure of the oil in the hydraulic pipeline to switch the state of the valve.
  • the first oil inlet is the P port of the oil inlet spool valve 31 in FIG. 1
  • the first working oil port is the A port of the oil inlet spool valve 31 in FIG. 1
  • the first oil return port is the oil inlet spool valve in FIG. 1
  • the second oil inlet is the P port of the oil drain spool valve 32 in Fig. 1
  • the second working oil port is the A port of the oil drain spool valve 32 in Fig. 1
  • the second oil return port is the oil drain valve in Fig. 1 Port A T port of valve 32.
  • the first direction of this embodiment is the vertical direction as shown in FIG. 1 .
  • the second direction in this embodiment is the horizontal direction as shown in FIG. 1 , and the included angle between the first direction and the second direction is 90°.
  • the pushing member 331 moves along The horizontal direction moves to the right, and when the parking member 334 is gradually disengaged from the parking pawl, the push member 331 moves to the left in the horizontal direction.
  • the first direction and the second direction are not limited to the limitations of this embodiment, and may also be other directions, and the first direction and the second direction can be set according to actual needs.
  • the added oil inlet slide valve 31 and the oil discharge slide valve 32 are both mechanical valves, and the oil inlet slide valve 31 and the oil discharge slide valve 32 are controlled by the pilot pressure regulating valve 1 to realize the hydraulic parking function
  • the production cost is reduced, and the control difficulty is reduced.
  • the parking lock structure of this embodiment further includes a first check valve 34 and a pressure maintaining valve 35 .
  • the inlet of the first check valve 34 is communicated with the first working oil port, and the first check valve
  • the outlet of 34 is communicated with the first oil discharge chamber and the first pressure keeping chamber of the pressure keeping valve 35 respectively, the inlet of the pressure keeping valve 35 is communicated with the outlet of the pressure regulating valve, and the outlet of the pressure keeping valve 35 is communicated with the second oil inlet
  • the first check valve 34 is opened, the oil discharged from the first working oil port enters the first oil discharge chamber and the first pressure holding chamber respectively through the first check valve 34, and the oil discharged from the outlet of the pressure regulating valve can It enters the second chamber 33304 through the pressure maintaining valve 35 , the second oil inlet port, the second working oil port, and the second communication port 33302 in sequence.
  • the stopper 332 moves downward in the first direction to separate the stopper 332 from the pusher 331.
  • the oil in the second chamber 33304 can pass through the first direction.
  • the two communication ports 33302 and the A port of the oil drain spool valve 32 reach the T port of the oil drain spool valve 32, the pushing member 331 moves to the right in the second direction to make the parking member 334 abut the parking pawl, and then the pilot pressure is adjusted
  • the output pressure of the valve 1 is adjusted to switch the oil inlet spool valve 31 from the non-basic position to the basic position.
  • the A port of the oil inlet spool valve 31 is connected to the T port of the oil inlet spool valve 31, and the oil in the first oil chamber can pass through the first oil chamber in turn.
  • a communication port 33301 , the A port of the oil inlet spool valve 31 is discharged from the T port of the oil inlet spool valve 31 , the stopper 332 is reset and abuts the left end surface
  • the pilot pressure regulating valve 1 controls the oil pressure entering the first oil chamber, so that the oil inlet spool valve 31 is switched to the basic position,
  • the oil in the first oil chamber can be discharged from the T port of the oil inlet spool valve 31 through the first communication port 33301 and the A port of the oil inlet spool valve 31 in sequence.
  • the above-mentioned basic position is the position of the valve core when there is no power supply or control pressure
  • the non-basic position is the other position of the valve core when it is not in the basic position.
  • the opening pressure of the pressure maintaining valve 35 in this embodiment is the same as the opening pressure of the oil drain spool valve 32 and the opening pressure of the first check valve 34.
  • the pressure maintaining valve 35 in this embodiment is a two-position two-way spool valve, the inlet of the pressure maintaining valve 35 is the P port of the pressure maintaining valve 35 in FIG. 1 , and the inlet of the pressure maintaining valve 35 is shown in FIG. 1 .
  • the A port of the middle pressure maintaining valve 35 when the pressure maintaining valve 35 is in the closed state, the P port of the pressure maintaining valve 35 is not connected to the A port of the pressure maintaining valve 35, and when the pressure maintaining valve 35 is in the open state, the pressure maintaining valve 35 is in the open state.
  • the P port of 35 communicates with the A port of the pressure maintaining valve 35 .
  • the pilot pressure regulating valve 1 adjusts the pressure of the oil entering the first oil chamber to increase, so that the first oil inlet of the oil inlet spool valve 31 is connected with the first working oil port, if the inlet of the first check valve 34 is When the oil pressure of the first check valve 34 is greater than the oil pressure at the inlet of the first check valve 34 and the difference between the two reaches the pressure when the first check valve 34 is opened, the inlet and outlet of the first check valve 34 are connected, and the second oil
  • the oil in the cavity can enter the first oil discharge cavity and the first pressure holding cavity respectively through the first check valve 34, so that the second oil inlet port of the oil discharge spool valve 32 can be communicated with the second working oil port, and the pressure holding valve
  • the inlet and outlet of 35 can be communicated, and the oil pressure at the inlet of the first check valve 34 is the same as the oil pressure at the inlet of the first check valve 34, so that the first check valve 34 is closed again, and the second check valve 34 is closed again.
  • the oil inlet is communicated with the second working oil port and the inlet and outlet of the pressure maintaining valve 35 are communicated.
  • the oil at the outlet of the pressure regulating valve can enter the second working oil port through the pressure maintaining valve 35, the second oil inlet port and the second working oil port in sequence. Chamber 33304.
  • the number of pressure regulating valves in this embodiment is two, and the two pressure regulating valves are the first pressure regulating valve 211 and the second pressure regulating valve 221 respectively, and the first pressure regulating valve 211
  • the main function of the pressure regulating valve 221 and the second pressure regulating valve 221 is to adjust the pressure by changing the oil pressure of the two outlets when engaging the clutch or shifting gears.
  • the parking lock structure also includes a shuttle valve 36.
  • the two inlets of the shuttle valve 36 are respectively It is communicated with the first pressure regulating valve 211 and the second pressure regulating valve 221, the outlet of the shuttle valve 36 is communicated with the first oil inlet, and the inlet of the pressure maintaining valve 35 is communicated with the first oil inlet and the inlet of the pressure maintaining valve 35 respectively. .
  • the first pressure regulating valve 211 When the outlet pressure of the first pressure regulating valve 211 is greater than the outlet pressure of the second pressure regulating valve 221, the first pressure regulating valve 211 communicates with the shuttle valve 36, and when the outlet pressure of the second pressure regulating valve 221 is greater than the first pressure regulating valve At the outlet pressure of 211, the second pressure regulating valve 221 communicates with the shuttle valve 36, and the oil can only flow out from the first pressure regulating valve 211 or the second pressure regulating valve 221 through the shuttle valve 36, but cannot pass through the shuttle valve 36.
  • the first pressure regulating valve 211 or the second pressure regulating valve 221 flows out.
  • one of the first pressure regulating valve 211 and the second pressure regulating valve 221 is communicated with the shuttle valve 36 and the oil inlet spool valve 31, and the first gear It is any one of the neutral gear, reverse gear, forward gear and sports gear of the vehicle.
  • the first pressure regulating valve 211 is connected with the shuttle valve 36 and the oil inlet spool valve 31, and when the reverse gear is switched with the parking gear, the second The pressure regulating valve 221 communicates with the shuttle valve 36 and the oil inlet spool valve 31 .
  • the state in which the first pressure regulating valve 211 or the second pressure regulating valve 221 communicates with the shuttle valve 36 and the oil inlet spool valve 31 when the first gear is switched between the parking gear is not limited to this embodiment.
  • This limitation of the example can also be other control strategies, but to ensure that when the first gear and the parking gear are switched, one of the first pressure regulating valve 211 and the second pressure regulating valve 221 is connected to the shuttle valve 36 and the oil inlet slip.
  • the valve 31 communicates.
  • the stopper 332 in this embodiment is provided with a limit protrusion 3321
  • the pusher 331 is provided with a groove 3310 that cooperates with the limit protrusion 3321
  • the assembly 33 includes a reset elastic member 335 and a loading elastic member 336. Both the reset elastic member 335 and the loading elastic member 336 are springs.
  • the reset elastic member 335 is located in the first chamber 33303, and one end of the reset elastic member 335 is connected to the housing 333. The other end is connected with the stopper 332.
  • the reset elastic piece 335 When the stopper 332 is separated from the pusher 331, the reset elastic piece 335 is compressed, and the reset elastic piece 335 can reset the stopper 332, so that the limiting protrusion 3321 is located in the groove 3310 or
  • the stopper 332 is in contact with the end face of the pusher 331 , the loading elastic piece 336 is sleeved on the pusher 331 and is located outside the casing 333 , one end of the loading elastic piece 336 is connected with the casing 333 , and the other end is connected with the pusher 331 Or the pushing member 331 is connected, and when the parking member 334 is separated from the parking pawl, the loading elastic member 336 is compressed, and the loading elastic member 336 can push the pushing member 331 to move in the second direction, so that the pushing member 331 drives the parking member 334 abuts the parking pawl.
  • the oil in the first chamber 33303 to push the pusher 331 must overcome the resultant force of the elastic member 336 and the force required to remove the stopper. Therefore, the first pressure regulating valve 211 or the second pressure regulating valve 221 The pressure of the oil at the outlet is greater than the opening pressure of the first check valve 34 .
  • the pushing member 331 may also be provided with a limiting protrusion 3321
  • the stopper 332 may be provided with a groove 3310 that cooperates with the limiting protrusion 3321, so as to realize the push member 331 and the stopper 332. abutment or separation.
  • the parking lock assembly 33 in this embodiment further includes a parking push-pull rod 337 , a parking elastic member 338 and a position sensor (not shown in the figure).
  • the parking elastic member 338 in this embodiment is a Spring, one end of the parking push-pull rod 337 is connected to the push member 331, and the other end is connected to the parking member 334.
  • the parking elastic member 338 is sleeved on the parking push-pull rod 337.
  • the pilot pressure regulating valve 1 controls the oil pressure entering the first oil chamber, so that the oil inlet spool valve 31 is switched to the basic position. Location.
  • the elastic force of the reset elastic member 335 is the first pressure
  • the difference between the inlet and outlet pressures of the first check valve 34 when the first check valve 34 is opened is the second pressure pressure
  • the second pressure is greater than the first pressure.
  • the first pressure is lower than the second pressure, which can ensure that when the stopper 332 is separated from the pusher 331, the first check valve 34 is still in a closed state, thereby further increasing the outlet pressure of the oil of the pressure regulating valve and the first check
  • the second check valve 44 is opened.
  • the parking lock assembly 33 of this embodiment further includes a bushing 339 , the bushing 339 is located in the second chamber 33304 , the pusher 331 is sealed and slidably connected with the bushing 339 , and the pusher 331 pushes the second
  • the chamber 33304 is divided into an isolated exhaust chamber and an oil chamber.
  • the casing 333 is also provided with a third communication port 33305.
  • the third communication port 33305 communicates with the exhaust chamber, and the second communication port 33302 communicates with the oil chamber.
  • the third communication port 33305 and the exhaust chamber can make the gas pressure in the exhaust chamber the same as the outside gas pressure when the pusher 331 moves.
  • the elastic force of the elastic member 336 is the third pressure, and the third pressure is greater than the first pressure.
  • the pressure of the oil discharged from the first working oil port into the first chamber 33303 is equal to the first pressure, and the first pressure is lower than the third pressure, which can make the stopper 332 and the pusher 331 detached , the loading elastic member 336 tends to push the pushing member 331 to the right.
  • the elastic force of the pressure maintaining elastic member of the pressure maintaining valve 35 is the fourth pressure, and the fourth pressure is lower than the third pressure.
  • the oil at the outlet of the shuttle valve 36 enters the second chamber 33304 through the pressure maintaining valve 35 and the oil drain spool valve 32 in turn, and the oil pressure at the second outlet of the oil drain spool valve 32 is equal to the third pressure,
  • the third pressure is greater than the first pressure, and because the fourth pressure is less than the third pressure, the resistance of the oil in the second chamber 33304 to the pushing member 331 is smaller than the maximum elastic force of the pressure-holding elastic member, so that the loading elastic member 336 can push The pusher 331 moves rightward in the horizontal direction.
  • the second oil inlet cavity of the oil inlet spool valve 31 in this embodiment is communicated with the outlet of the shuttle valve 36, and one end of the oil inlet elastic member of the oil inlet spool valve 31 extends into the second oil inlet cavity.
  • This arrangement makes the oil inlet spool valve 31 actually work, the oil in the second oil inlet chamber and the oil inlet elastic member of the oil inlet spool valve 31 exert a leftward force on the oil inlet piston of the oil inlet spool valve 31, and the first The oil in the oil inlet chamber exerts a rightward force on the oil inlet piston, so that the oil inlet piston moves to the left or right, thereby changing the opening state of the oil inlet spool valve 31 and avoiding the misoperation of the pilot pressure regulating valve 1 The phenomenon of the oil inlet spool valve 31 occurs.
  • the parking lock structure of this embodiment further includes a first fuel tank 37 and a second fuel tank 38 .
  • the first fuel tank 37 is communicated with the first fuel return port, so that the first fuel tank 37 can hold the first fuel tank 37 .
  • the second oil tank 38 is communicated with the second oil return port, so that the second oil tank 38 can contain the oil discharged through the second oil return port.
  • the hydraulic control system of the automatic transmission of this embodiment further includes a low-pressure cooling and lubrication structure.
  • the low-pressure cooling and lubrication structure includes a first oil tank 41 , a high-pressure oil pump 42 , a high-pressure filter 43 , and a second check valve that are connected in sequence.
  • the accumulator 45 is respectively communicated with the first pressure regulating chamber of the first pressure regulating valve 211 and the second pressure regulating chamber of the second pressure regulating valve 221, and then the oil in the first pressure regulating chamber
  • the opening state of the first pressure regulating valve 211 can be adjusted, the oil in the second pressure regulating chamber can adjust the opening state of the second pressure regulating valve 221, and the low-pressure cooling and lubricating structure also includes a switching valve 46, the inlet of the switching valve 46 and the high pressure
  • the pipeline between the filter 43 and the second check valve 44 is connected, the second check valve 44 can be opened when the switching valve 46 is de-energized, and the high-pressure oil pump 42 can charge the accumulator 45; when the switching valve 46 is energized,
  • the high-pressure oil pump 42 can pump the oil in the first oil tank 41 through the switching valve 46 , the high-pressure oil pump 42 releases pressure, the second check valve 44 is closed, and the accumulator 45 maintains pressure.
  • the low-pressure cooling and lubricating structure of this embodiment further includes a safety valve 47 and a pressure sensor 48 .
  • the safety valve 47 is arranged between the high-pressure oil pump 42 and the high-pressure filter 43
  • the pressure sensor 48 is arranged to detect the accumulator 45 . pressure.
  • the low-pressure cooling and lubricating structure of this embodiment further includes a second oil tank 51 , a low-pressure oil pump 52 , a cooler 53 , and a low-pressure filter 54 that are communicated in sequence.
  • the height of the second oil tank 51 is lower than that of the first oil tank 41 .
  • height and the second oil tank 51 is communicated with the first oil tank 41.
  • One of the cooling pipeline 55 and the lubricating pipeline 56 is provided with a flow regulating valve 57.
  • the pilot pressure regulating valve 1 Connected with the pilot pressure regulating valve 1, the main function of the pilot pressure regulating valve 1 is to regulate the flow of the flow regulating valve 57, and the flow regulating valve 57 is a two-position two-way spool valve.
  • the opening pressure of the flow regulating valve 57 in this embodiment is greater than the force of the oil inlet elastic member on the oil inlet piston when the first oil inlet of the oil inlet slide valve 31 is connected to the first working oil port.
  • the low-pressure cooling and lubricating structure of this embodiment further includes a suction filter 58 , a pressure relief valve 59 , and a bypass valve 510 .
  • the suction filter 58 is located between the second oil tank 51 and the low-pressure oil pump 52 , and the suction filter 58 can utilize The vacuum makes the oil pass through the filter cloth of the suction filter 58 to separate the solid particles in the oil.
  • the inlet of the pressure relief valve 59 is connected to the pipeline between the low pressure oil pump 52 and the cooler 53, and the outlet of the pressure relief valve 59 is connected to the second
  • the pipeline between the oil tank 51 and the suction filter 58 is connected, and the pressure relief valve 59 can be opened when the oil pressure at the outlet of the low pressure oil pump 52 is high to return the oil at the outlet of the low pressure oil pump 52 to the second through the pressure relief valve 59.
  • Oil tank 51, bypass valve 510 is connected in parallel with the series pipeline of cooler 53 and low pressure filter 54, bypass valve 510 can be opened when the temperature of oil in cooling pipeline 55 and lubricating pipeline 56 is low to prevent low pressure
  • the oil at the outlet of the oil pump 52 continues to cool down.
  • the gear operation structure of this embodiment further includes an odd-numbered clutch pressure regulating valve 212 , an odd-numbered emergency oil drain spool valve 213 , a first odd-numbered shift valve 214 , a second odd-numbered shift valve 215 , and an even-numbered clutch pressure
  • the valve 211 can adjust the oil flow of the first odd-numbered shift valve 214 and the second odd-numbered shift valve 215 to realize the shifting of the first, third, fifth, and seventh gears.
  • the second even-numbered shift valve 225 is related to the second pressure.
  • the regulating valve 221 is connected, and the second pressure regulating valve 221 can adjust the oil flow of the first even-numbered shift valve 224 and the second even-numbered shift valve 225 to realize the shifting of the second, fourth, sixth and reverse gears.

Landscapes

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

Abstract

La présente invention concerne un système de commande hydraulique pour une transmission automatique, le système de commande hydraulique comprenant : une soupape de régulation de pression pilote (1) ; une structure d'actionnement d'engrenage comprenant une soupape de régulation de pression ; et une structure de verrouillage de stationnement comprenant un distributeur à tiroir d'entrée d'huile (31), un distributeur à tiroir de sortie d'huile (32) et un ensemble de verrouillage de stationnement (33), l'ensemble de verrouillage de stationnement comprenant un élément de poussée (331), un élément d'arrêt (332), un logement (333) et un élément de stationnement (334), l'élément de stationnement étant raccordé à l'élément de poussée, l'élément de poussée s'étendant partiellement dans une chambre et divisant la chambre en une première chambre (33303) et une seconde chambre (33304), l'élément d'arrêt étant disposé dans la première chambre, une première cavité d'entrée d'huile du distributeur à tiroir d'entrée d'huile étant en communication avec la soupape de régulation de pression pilote, et une seconde entrée d'huile du distributeur à tiroir de sortie d'huile étant apte à être en communication avec une conduite n entre la soupape de régulation de pression et la première entrée d'huile.
PCT/CN2021/123980 2020-10-15 2021-10-15 Dispositif de commande hydraulique pour transmission automatique WO2022078478A1 (fr)

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CN113944668A (zh) * 2021-11-03 2022-01-18 山推工程机械股份有限公司 一种先导控制系统
WO2023088513A1 (fr) * 2021-11-18 2023-05-25 Schaeffler Technologies AG & Co. KG Ensemble hydraulique et procédé de commande d'un ensemble hydraulique
WO2023088509A1 (fr) * 2021-11-18 2023-05-25 Schaeffler Technologies AG & Co. KG Procédé d'actionnement d'un dispositif de verrouillage de stationnement
CN114151541B (zh) * 2021-12-01 2023-06-02 中国第一汽车股份有限公司 一种自动变速器液压控制装置及车辆
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