CN110594405B - Hydraulic control device for automatic transmission - Google Patents
Hydraulic control device for automatic transmission Download PDFInfo
- Publication number
- CN110594405B CN110594405B CN201910917733.4A CN201910917733A CN110594405B CN 110594405 B CN110594405 B CN 110594405B CN 201910917733 A CN201910917733 A CN 201910917733A CN 110594405 B CN110594405 B CN 110594405B
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- Prior art keywords
- switching valve
- valve
- oil
- failure switching
- failure
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 41
- 230000001105 regulatory effect Effects 0.000 claims abstract description 42
- 230000001276 controlling effect Effects 0.000 claims abstract description 10
- 239000003921 oil Substances 0.000 claims description 272
- 239000012208 gear oil Substances 0.000 claims description 6
- 238000000926 separation method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 1
Classifications
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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
- F16H61/02—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
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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
- F16H61/02—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
- F16H61/0276—Elements specially adapted for hydraulic control units, e.g. valves
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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
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
-
- 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
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
- F16H2061/1224—Adapting to failures or work around with other constraints, e.g. circumvention by avoiding use of failed parts
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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
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
- F16H2061/1232—Bringing the control into a predefined state, e.g. giving priority to particular actuators or gear ratios
-
- 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
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
- F16H2061/1252—Fail safe valves
Abstract
The invention discloses a hydraulic control device of an automatic transmission, which comprises a first failure switching valve, a second failure switching valve, a third failure switching valve connected with the first failure switching valve and the second failure switching valve, a clutch system connected with the first failure switching valve, the second failure switching valve and the third failure switching valve, a pressure regulating electromagnetic valve connected with the second failure switching valve and used for providing oil for the first failure switching valve when the transmission enters a failure mode, and a switching electromagnetic valve used for controlling the first failure switching valve, wherein the switching electromagnetic valve is a normally-low electromagnetic valve, and the pressure regulating electromagnetic valve is a normally-high electromagnetic valve. The hydraulic control device of the automatic transmission has only one type of pressure regulating electromagnetic valve controlled by all clutch brakes, is a normal low-pressure electromagnetic valve, reduces the cost and improves the safety of the transmission.
Description
Technical Field
The invention belongs to the technical field of gearboxes, and particularly relates to a hydraulic control device of an automatic transmission.
Background
In automatic transmissions, shift control is typically performed using an electro-hydraulic system, and in order to improve safety performance, power to solenoid valves of the hydraulic system is typically cut off when a transmission control unit detects a failure and cannot handle it. The hydraulic system will then enter a specific safety gear to keep the vehicle still running to the service location. The prior art generally adopts a normally high pressure regulating electromagnetic valve (when the power is off, the electromagnetic valve outputs high pressure) for a control system of a clutch or a brake forming a specific failure gear, and adopts a normally low pressure regulating electromagnetic valve for the control system of other clutches or brakes, so that the variety of the pressure regulating electromagnetic valve for controlling the clutch brake is more and the safety performance is poorer.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a hydraulic control device of an automatic transmission, with the aim of improving the safety performance of the automatic transmission.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the hydraulic control device of the automatic transmission comprises a first failure switching valve, a second failure switching valve, a third failure switching valve connected with the first failure switching valve and the second failure switching valve, a clutch system connected with the first failure switching valve, the second failure switching valve and the third failure switching valve, a pressure regulating electromagnetic valve connected with the second failure switching valve and used for providing oil for the first failure switching valve when the transmission enters a failure mode, and a switching electromagnetic valve used for controlling the first failure switching valve, wherein the switching electromagnetic valve is a normally low electromagnetic valve, and the pressure regulating electromagnetic valve is a normally high electromagnetic valve.
The clutch system comprises a first clutch connected with the third failure switching valve, a second clutch and a third clutch connected with the first control system and the second control system through the first failure switching valve, and a fourth clutch and a brake connected with the second failure switching valve, wherein the first failure switching valve and the third failure switching valve are connected with the first control system.
The first failure switching valve is provided with a first control oil port, a second control oil port, a third control oil port, a first oil inlet, a second oil inlet, a first oil outlet, a second oil outlet, a third oil inlet and a fourth oil inlet, the first control oil port of the first failure switching valve is connected with the first oil outlet of the third failure switching valve, the second failure switching valve and the third failure switching valve are used for guiding oil from the control oil port of the pressure regulating electromagnetic valve to the first control oil port of the first failure switching valve, the second control oil port of the first failure switching valve is connected with the oil outlet of the pressure reducing valve, the third control oil port of the first failure switching valve is connected with the oil outlet of the switching electromagnetic valve, the first oil outlet of the first failure switching valve is connected with the second clutch, the first oil inlet of the first failure switching valve is connected with the second control system and the second control oil port of the third failure switching valve, and the third oil inlet of the first failure switching valve is connected with the second control system.
The second failure switching valve is provided with a first control oil port, a second control oil port, a first oil inlet and a first oil outlet, the first control oil port of the second failure switching valve is connected with the fourth clutch, the second control oil port of the second failure switching valve is connected with the brake, the first oil inlet of the second failure switching valve is connected with the control oil port of the pressure regulating electromagnetic valve, and the first oil outlet of the second failure switching valve is connected with the first oil inlet of the third failure switching valve.
When the transmission enters a failure mode, the oil pressure of the first clutch, the fourth clutch, the brake and the first control system is zero, the switching electromagnetic valve and the pressure regulating electromagnetic valve are powered off, the control oil port of the pressure regulating electromagnetic valve is in a state of maximum oil pressure, the oil of the control oil port of the pressure regulating electromagnetic valve flows to the first control oil port of the first failure switching valve through the second failure switching valve and the third failure switching valve, the fourth oil inlet of the first failure switching valve is communicated with the second oil outlet, the second oil inlet of the first failure switching valve is communicated with the first oil outlet, the main pressure regulating valve is communicated with the third clutch through the first failure switching valve, the D gear oil path of the manual valve is communicated with the second clutch through the first failure switching valve, the oil of the main pressure regulating valve flows to the third clutch through the first failure switching valve, and the oil of the D gear oil path of the manual valve flows to the second clutch through the first failure switching valve, and the second clutch and the third clutch form a failure gear.
When the transmission does not need to enter a failure mode, the switch electromagnetic valve is electrified, oil at an oil outlet of the switch electromagnetic valve enters a third control oil port of the first failure switching valve, the valve core is pushed to move, a third oil inlet of the first failure switching valve is communicated with a second oil outlet, the second control system is communicated with the third clutch through the first failure switching valve, and a first oil outlet of the first failure switching valve is communicated with the first oil inlet, so that the second clutch is communicated with the first control system through the first failure switching valve.
When the transmission normally works, the oil pressure of one or two of the first clutch, the fourth clutch, the brake and/or the first control system is larger than zero, the oil flowing into the control oil port of the second failure switching valve or the third failure switching valve pushes the valve core to move, so that the oil of the first oil outlet of the second failure switching valve or the first oil outlet of the third failure switching valve can be discharged through the EX port, the pressure of the control oil port of the first failure switching valve is zero, the valve core is pushed to reset by the spring of the first failure switching valve, the third oil inlet of the first failure switching valve is communicated with the second oil outlet, the second control system is communicated with the third clutch through the first failure switching valve, and the first oil outlet and the first oil inlet of the first failure switching valve are communicated with the first control system through the first failure switching valve.
The hydraulic control device of the automatic transmission has only one type of pressure regulating electromagnetic valve controlled by all clutch brakes, is a normal low-pressure electromagnetic valve, reduces the cost and improves the safety of the transmission.
Drawings
The present specification includes the following drawings, the contents of which are respectively:
FIG. 1 is a schematic configuration view of a hydraulic control apparatus of an automatic transmission of the present invention;
marked in the figure as: 1. a filter; 2. an oil pump; 3. a first fail-over valve; 3a, a first control oil port; 3b, a first oil inlet; 3c, a first oil outlet; 3d, a third oil inlet; 3e, a second oil outlet; 3f, a fourth oil inlet; 3g, a second control oil port; 3h, a third control oil port; 3i, a second oil inlet; 4. switching on and off the electromagnetic valve; 4a, an oil outlet; 5. a second fail-over valve; 5a, a first control oil port; 5b, a second control oil port: 5c, a first oil inlet; 5d, a first oil outlet; EX, oil drain; 6. a third fail-over valve; 6a, a first control oil port; 6b, a second control oil port; 6c, a first oil inlet; 6d, a first oil outlet; EX, oil drain; 7. a first clutch; 8. a second clutch; 9. a third clutch; 10. a fourth clutch; 11. a brake; 12. a first control system; 13. a second control system; 14. a main pressure regulating valve; 15. a pressure regulating solenoid valve; prd, oil outlet of pressure relief valve.
Detailed Description
The following detailed description of the embodiments of the invention, given by way of example only, is presented in the accompanying drawings to aid in a more complete, accurate and thorough understanding of the concepts and aspects of the invention, and to aid in its practice, by those skilled in the art.
In the following embodiments, the "first", "second", "third" and "fourth" do not represent an absolute distinction between structures and/or functions, and do not represent a sequential order of execution, but are merely for convenience of description.
As shown in fig. 1, the present invention provides a hydraulic control apparatus of an automatic transmission, including a main regulator valve, a first fail-over valve 3, a second fail-over valve 5, a third fail-over valve 6 connected to the first fail-over valve 3 and the second fail-over valve 5, a clutch system connected to the first fail-over valve 3, the second fail-over valve 5 and the third fail-over valve 6, a regulator solenoid valve 15 connected to the second fail-over valve 5 and for supplying oil to the first fail-over valve 3 when the transmission enters a fail mode, and a switching solenoid valve 4 for controlling the first fail-over valve 3, the switching solenoid valve 4 being a normally low solenoid valve, the regulator solenoid valve 15 being a normally high solenoid valve.
Specifically, as shown in fig. 1, the clutch system includes a first clutch 7 connected to a third fail-over valve 6, a second clutch 8 and a third clutch 9 connected to a first control system 12 and a second control system 13 through a first fail-over valve 3, and a fourth clutch 10 and a brake 11 connected to a second fail-over valve 5, the first fail-over valve 3 and the third fail-over valve 6 are connected to the first control system 12, the second control system 13 is connected to the first fail-over valve 3, and the second clutch 8 and the third clutch 9 are connected to the first fail-over valve 3. The switch solenoid valve 4 controls the state of the first failure switching valve 3, the switch solenoid valve 4 is used for controlling the valve core of the first failure switching valve 3 to be switched from the first state to the second state, a reset spring used for pushing the valve core to be switched from the first state to the second state is further arranged in the first failure switching valve 3, and the reset of the first failure switching valve 3 is realized by the cooperation of the reset spring, the pressure reducing valve and the switch solenoid valve 4.
As shown in fig. 1, the first fail-over valve 3 has a first control port 3a, a second control port 3g, a third control port 3h, a first oil inlet 3b, a second oil inlet 3i, a first oil outlet 3c, a second oil outlet 3e, a third oil inlet 3d, and a fourth oil inlet 3f, and the third fail-over valve 6 has a first control port 6a, a second control port 6b, a first oil inlet 6c, and a first oil outlet 6d. The first control oil port 3a of the first fail-over valve 3 is connected with the first oil outlet 6D of the third fail-over valve 6, the second fail-over valve 5 and the third fail-over valve 6 are used for guiding the oil from the control oil port of the piezoelectric solenoid valve 15 to the first control oil port 3a of the first fail-over valve 3, the second control oil port 3g of the first fail-over valve 3 is connected with the oil outlet Prd of the pressure reducing valve, the third control oil port 3h of the first fail-over valve 3 is connected with the oil outlet 4a of the switching solenoid valve 4, the first oil outlet 3c of the first fail-over valve 3 is connected with the second clutch 8, the second oil outlet 3e of the first fail-over valve 3 is connected with the third clutch 9, the first oil inlet 3b of the first fail-over valve 3 is connected with the second control oil port 6b of the first fail-over valve 6, the third oil inlet 3D of the first fail-over valve 3 is connected with the second control system 13, the first oil inlet 3f of the first fail-over valve 3 is connected with the first oil line 3f of the second fail-over valve 6, and the first fail-over valve is in the forward position of the manual transmission (i.d is the forward position of the first fail-speed valve is the forward position of the manual transmission valve).
As shown in fig. 1, the second fail-over valve 5 has a first control oil port 5a, a second control oil port 5b, a first oil inlet 5c, and a first oil outlet 5d, the first control oil port 5a of the second fail-over valve 5 is connected to the fourth clutch 10, the second control oil port 5b of the second fail-over valve 5 is connected to the brake 11, the first oil inlet 5c of the second fail-over valve 5 is connected to the control oil port of the pressure regulating solenoid valve 15, the first oil outlet 5d of the second fail-over valve 5 is connected to the first oil inlet 6c of the third fail-over valve 6, and the pressure regulating solenoid valve 15 is connected to the main pressure regulating valve 14. By providing the second fail-over valve 5 and the third fail-over valve 6, the oil pressure of the control port of the pressure-regulating solenoid valve 15 is connected to the first control port 3a of the first fail-over valve 3, and control of the clutch is achieved.
As shown in fig. 1, the on-off solenoid valve 4 is used for controlling the state of the first fail-over valve 3, the on-off solenoid valve 4 has one oil outlet 4a, the on-off solenoid valve 4 is connected with an oil outlet Prd of a pressure reducing valve provided in a main oil passage of the transmission, a second control oil port 3g of the first fail-over valve 3 is connected with the oil outlet Prd of the pressure reducing valve, and a third control oil port 3h of the first fail-over valve 3 is connected with the oil outlet 4a of the on-off solenoid valve 4. When the on-off solenoid valve 4 is energized, the oil outlet 4a of the on-off solenoid valve 4 communicates with the oil outlet Prd of the pressure reducing valve, the oil pressure of the oil outlet 4a of the on-off solenoid valve 4 is the same as the oil pressure of the oil outlet Prd of the pressure reducing valve, and the oil pressure of the oil outlet 4a of the on-off solenoid valve 4 is greater than zero.
As shown in fig. 1, when the transmission is operating normally, the vehicle is running normally, any one of the first clutch 7, the fourth clutch 10, the brake 11 and the first control system 12 has pressure output, the oil flowing into the valve cavity of the second fail-over valve 5 or the third fail-over valve 6 pushes the valve core of the second fail-over valve 5 or the third fail-over valve 6 to move, the valve core of the second fail-over valve 5 or the third fail-over valve 6 moves to the spring end (the oil from the first clutch 7 enters the valve cavity of the third fail-over valve 6 through the first control oil port 6a of the third fail-over valve 6 and can push the valve core to move towards the spring end, the oil from the fourth clutch 10 enters the valve cavity of the second fail-over valve 5 through the first control oil port 5a of the second fail-over valve 5 and can push the valve core to move towards the spring end, the oil from the brake 11 enters the valve cavity of the second fail-over valve 5 through the second control oil port 5b of the second fail-over valve 5 and can push the valve core to move towards the spring end (the valve cavity of the third fail-over valve 6d is pushed by the second control oil outlet 6d of the second fail-over valve 6) and the oil from the fourth clutch 10 enters the valve cavity of the second fail-over valve 6 to move towards the spring end, the third fail-over valve 6d is pushed by the second fail-over valve 6b of the second fail-over valve 6 is pushed by the second fail-over valve 6, and the oil from the third oil outlet 6 EX is pushed by the second fail-over valve 6 is pushed by the second control oil from the second valve 6, the oil in the oil outlet Prd of the pressure reducing valve enters the second control oil port 3g of the first failure switching valve 3 to push the valve core of the first failure switching valve 3 to move, and because the first control oil port 3a is communicated with the first oil outlet 6d or the first control oil port 3a is communicated with the first oil outlet 5d through the third failure switching valve 6, the oil in the first control oil port 3a can be discharged, and then the valve core of the first failure switching valve 3 moves to a non-spring end under the action of the spring force generated by the return spring and the pressure of the second control oil port 3g, the first failure switching valve 3 is in a spring return state, in this state, the third oil inlet 3d and the second oil outlet 3e of the first failure switching valve 3 are communicated, the first oil outlet 3c and the first oil inlet 3b of the first failure switching valve 3 are communicated with the first clutch 9 through the first failure switching valve 3, and the second clutch 8 is communicated with the first control system 12 through the first failure switching valve 3. The first control system 12 is used for adjusting the pressure of the second clutch 8, the first control system 12 is used for controlling the combination and the separation of the second clutch 8, the second control system 13 is used for adjusting the pressure of the third clutch 9, and the second control system 13 is used for controlling the combination and the separation of the third clutch 9 to realize the normal shift of the gear of the transmission.
Therefore, when the vehicle is running normally, any one or two of the first clutch 7, the fourth clutch 10, the brake 11 and the first control system 12 has a combined pressure to control the state of the second fail-safe valve 5 or the third fail-safe valve 6, the control port oil pressure of the pressure regulating solenoid valve 15 is connected to the first control port of the first fail-safe valve 3 to be cut off by the second fail-safe valve 5 or the third fail-safe valve 6, and the spool of the first fail-safe valve 3 is at the unsprung end and cannot enter the fail-safe gear. With this structure, the safety accident that the output shaft of the transmission is locked due to the pressure of other clutch brakes when the transmission enters the failure mode gear is avoided.
As shown in fig. 1, when the transmission enters the failure mode, a failure is detected, the transmission control unit cuts off the power supply of all the electromagnetic valves, the oil pressure of the first clutch 7, the fourth clutch 10, the brake 11 and the first control system 12 is zero, the switching electromagnetic valve 4 and the pressure regulating electromagnetic valve 15 are powered off, the control oil port of the pressure regulating electromagnetic valve 15 is in the state of maximum oil pressure (the oil pressure of the control oil port of the pressure regulating electromagnetic valve 15 is the maximum value at this time), the valve cores of the second failure switching valve 5 and the third failure switching valve 6 are at the non-spring end under the spring force generated by the return spring, the second failure switching valve 5 and the third failure switching valve 6 are in the spring return state, the oil pressure of the first control oil port 5a and the second control oil port 5b of the second failure switching valve 5 is zero, the oil pressure of the first control oil port 6a and the second control oil port 6b of the third failure switching valve 6 is zero, the first oil outlet 5c and the first oil outlet 5d of the pressure regulating electromagnetic valve 15 are communicated, the first 6c of the third failure switching valve 6 and the first oil port 3 is also communicated with the first oil port 3 through the first oil port 3 of the first failure switching valve 3 and the second failure switching valve 3, the first oil port 3 is pushed by the first valve 3 and the first failure switching valve 3 is pushed by the first valve core 3 to the first failure switching valve 3 and the first failure switching valve 3 oil port 3 is pushed by the first failure switching valve 3 to the first failure switching valve 3, after the valve core of the first failure switching valve 3 is in a first state, the fourth oil inlet 3f of the first failure switching valve 3 is communicated with the second oil outlet 3e, the second oil inlet 3i of the first failure switching valve 3 is communicated with the first oil outlet 3c, the main pressure regulating valve 14 is further communicated with the third clutch 9 through the first failure switching valve 3, the D-gear oil way of the manual valve is communicated with the second clutch 8 through the first failure switching valve 3, oil from the main pressure regulating valve 14 flows to the third clutch 9 through the first failure switching valve 3, the third clutch 9 is combined, oil from the D-gear oil way of the manual valve flows to the second clutch 8 through the first failure switching valve 3, the second clutch 8 is combined, at the moment, the second clutch 8 and the third clutch 9 are in a combined state, the second clutch 8 and the third clutch 9 form a failure gear, and the transmission is in a failure gear formed by combining the second clutch 8 and the third clutch 9. The oil inlet of the main pressure regulating valve 14 is connected with the oil pump, the oil outlet of the main pressure regulating valve 14 is connected with the first failure switching valve 3, the oil inlet and the oil outlet of the main pressure regulating valve 14 are communicated, and the control oil port of the main pressure regulating valve 14 is connected with the pressure regulating electromagnetic valve 15.
As shown in fig. 1, when the transmission does not need to enter a failure mode, the switch electromagnetic valve 4 is electrified, the oil pressure at the oil outlet 4a of the switch electromagnetic valve 4 is the same as the oil pressure of the oil outlet Prd of the pressure reducing valve, the third control oil port 3h of the first failure switch valve 3 is pressurized, the oil at the oil outlet Prd of the pressure reducing valve enters the second control oil port 3g of the first failure switch valve 3, the valve core of the first failure switch valve 3 is pushed to move, and the valve core of the first failure switch valve 3 is moved to a non-spring end under the action of the spring force generated by the return spring and the pushing action of the oil from the third control oil port 3h and the second control oil port 3g, so that the valve core of the first failure switch valve 3 is switched to a second state from a first state, the first failure switch valve 3 is in a spring return state, the valve core of the first failure switch valve 3 is in a second state, and the third oil inlet 3d of the first failure switch valve 3 is communicated with the second oil outlet 3e of the first failure switch valve 3, the valve core is pushed to move, the first oil outlet 3c of the first failure switch valve 3b is communicated with the first oil inlet 3b of the first failure switch valve 3 is communicated with the first clutch system 9 and the first clutch system 8 is connected with the second clutch system 8 through the first clutch system 9, and the first clutch system is connected with the first clutch system 8 and the second clutch system 8 is connected with the first clutch system 8, and the first clutch system is connected with the first clutch system 3 and the clutch system 3 is connected with the clutch system 3 and the control system 3 is connected with the clutch system 3 and the control system 3 and the 3 is under the state. The second clutch 8 and the third clutch 9 are normally shifted under the control of the clutch control system.
Therefore, the first fail-safe valve 3 can be controlled with a normally low solenoid valve so that the automatic transmission is not in the fail mode.
The invention is described above by way of example with reference to the accompanying drawings. It will be clear that the invention is not limited to the embodiments described above. As long as various insubstantial improvements are made using the method concepts and technical solutions of the present invention; or the invention is not improved, and the conception and the technical scheme are directly applied to other occasions and are all within the protection scope of the invention.
Claims (5)
1. The utility model provides a hydraulic control device of automatic transmission, includes first inefficacy switching valve, second inefficacy switching valve, the third inefficacy switching valve of being connected with first inefficacy switching valve and second inefficacy switching valve and the clutch system who is connected with first inefficacy switching valve, second inefficacy switching valve and third inefficacy switching valve, its characterized in that: the system further comprises a pressure regulating electromagnetic valve which is connected with the second failure switching valve and is used for providing oil for the first failure switching valve when the transmission enters a failure mode, and a switching electromagnetic valve which is used for controlling the first failure switching valve, wherein the switching electromagnetic valve is a normally low electromagnetic valve, and the pressure regulating electromagnetic valve is a normally high electromagnetic valve;
the clutch system comprises a first clutch connected with the third failure switching valve, a second clutch and a third clutch connected with a first control system and a second control system through the first failure switching valve, and a fourth clutch and a brake connected with the second failure switching valve, wherein the first failure switching valve and the third failure switching valve are connected with the first control system, the second control system is connected with the first failure switching valve, and the second clutch and the third clutch are connected with the first failure switching valve;
the switch electromagnetic valve is used for controlling the valve core of the first failure switching valve to be switched from the first state to the second state, and a reset spring used for pushing the valve core to be switched from the first state to the second state is further arranged in the first failure switching valve, and the reset of the first failure switching valve is realized by the cooperation of the reset spring, the pressure reducing valve and the switch electromagnetic valve;
the first failure switching valve is provided with a first control oil port (3 a), a second control oil port (3 g), a third control oil port (3 h), a first oil inlet (3 b), a second oil inlet (3 i), a first oil outlet (3 c), a second oil outlet (3 e), a third oil inlet (3 d) and a fourth oil inlet (3 f), the first control oil port (3 a) of the first failure switching valve is connected with a first oil outlet (6 d) of the third failure switching valve, the second failure switching valve and the third failure switching valve are used for guiding oil from the control oil port of the pressure regulating electromagnetic valve to the first control oil port (3 a) of the first failure switching valve, the second control oil port (3 g) of the first failure switching valve is connected with the oil outlet (Prd) of the pressure reducing valve, the third control oil port (3 h) of the first failure switching valve is connected with the oil outlet of the switching electromagnetic valve, the first oil outlet (3 c) of the first failure switching valve is connected with the second clutch, the second oil outlet (3 e) of the first failure switching valve is connected with the first oil inlet of the first failure switching valve (3 b) of the first failure switching valve is connected with the first clutch and the first oil inlet of the first failure switching valve (3 b) of the first failure switching valve.
2. The hydraulic control apparatus of an automatic transmission according to claim 1, characterized in that: the second failure switching valve is provided with a first control oil port (5 a), a second control oil port (5 b), a first oil inlet (5 c) and a first oil outlet (5 d), the first control oil port (5 a) of the second failure switching valve is connected with the fourth clutch, the second control oil port (5 b) of the second failure switching valve is connected with the brake, the first oil inlet (5 c) of the second failure switching valve is connected with the control oil port of the pressure regulating electromagnetic valve, and the first oil outlet (5 d) of the second failure switching valve is connected with the first oil inlet (6 c) of the third failure switching valve.
3. The hydraulic control apparatus of an automatic transmission according to claim 2, characterized in that: when the transmission enters a failure mode, the oil pressure of the first clutch, the fourth clutch, the brake and the first control system is zero, the switching electromagnetic valve and the pressure regulating electromagnetic valve are powered off, the control oil port of the pressure regulating electromagnetic valve is in a state of maximum oil pressure, the oil of the control oil port of the pressure regulating electromagnetic valve flows to the first control oil port (3 a) of the first failure switching valve through the second failure switching valve and the third failure switching valve, the fourth oil inlet (3 f) of the first failure switching valve is communicated with the second oil outlet (3 e), the second oil inlet (3 i) of the first failure switching valve is communicated with the first oil outlet (3 c), the main pressure regulating valve is communicated with the third clutch through the first failure switching valve, the D-gear oil path of the manual valve is communicated with the second clutch through the first failure switching valve, the oil from the main pressure regulating valve flows to the third clutch through the first failure switching valve, and the oil of the D-gear oil path of the manual valve flows to the second clutch through the first failure switching valve at this time, and the second clutch and the third clutch are in failure gear.
4. The hydraulic control apparatus of an automatic transmission according to claim 2, characterized in that: when the transmission does not need to enter a failure mode, the switch electromagnetic valve is electrified, oil at an oil outlet of the switch electromagnetic valve enters a third control oil port (3 h) of the first failure switching valve, the valve core is pushed to move, a third oil inlet (3 d) of the first failure switching valve is communicated with a second oil outlet (3 e), the second control system is communicated with the third clutch through the first failure switching valve, and a first oil outlet (3 c) of the first failure switching valve is communicated with a first oil inlet (3 b), so that the second clutch is communicated with the first control system through the first failure switching valve.
5. The hydraulic control apparatus according to any one of claims 2 to 4, characterized in that: when the transmission works normally, the oil pressure of one or two of the first clutch, the fourth clutch, the brake and the first control system is larger than zero, the oil flowing into the control oil port of the second failure switching valve or the third failure switching valve pushes the valve core to move, so that the oil of the first oil outlet (5 d) of the second failure switching valve or the first oil outlet (6 d) of the third failure switching valve is discharged through the oil discharge port, the pressure of the control oil port (3 a) of the first failure switching valve is zero, the spring of the first failure switching valve pushes the valve core to reset, the third oil inlet (3 d) of the first failure switching valve is communicated with the second oil outlet (3 e) of the first failure switching valve, the second control system is communicated with the third clutch through the first failure switching valve, and the first oil outlet (3 c) and the first oil inlet (3 b) of the first failure switching valve are communicated with the first control system through the first failure switching valve.
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| CN201910917733.4A CN110594405B (en) | 2019-09-26 | 2019-09-26 | Hydraulic control device for automatic transmission |
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| CN201910917733.4A CN110594405B (en) | 2019-09-26 | 2019-09-26 | Hydraulic control device for automatic transmission |
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| CN110594405B true CN110594405B (en) | 2024-03-29 |
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