CN107975594B - Hydraulic system of automatic transmission - Google Patents
Hydraulic system of automatic transmission Download PDFInfo
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- CN107975594B CN107975594B CN201711456042.6A CN201711456042A CN107975594B CN 107975594 B CN107975594 B CN 107975594B CN 201711456042 A CN201711456042 A CN 201711456042A CN 107975594 B CN107975594 B CN 107975594B
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0003—Arrangement or mounting of elements of the control apparatus, e.g. valve assemblies or snapfittings of valves; Arrangements of the control unit on or in the transmission gearbox
- F16H61/0009—Hydraulic control units for transmission control, e.g. assembly of valve plates or valve units
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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
- F16H2061/1252—Fail safe valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention discloses a hydraulic system of an automatic transmission, which comprises a first failure valve, a second failure valve connected with the first failure valve, a normally-high electromagnetic valve used for controlling the first failure valve, a clutch system connected with the first failure valve and a normally-low electromagnetic valve used for controlling the second failure valve and used for forming two failure gears. According to the hydraulic system of the automatic transmission, two failure gears are realized by adopting the normally low electromagnetic valve, the gear number is divided into the low gear stage and the high gear stage, if the hydraulic system is in the form of the low gear stage before failure, the failure gear in the low gear stage is entered during failure, and if the hydraulic system is in the form of the high gear stage before failure, the hydraulic system is in the high gear failure gear stage during failure, so that the safety performance of the automatic transmission is improved.
Description
Technical Field
The invention belongs to the technical field of speed changers, and particularly relates to a hydraulic system of an automatic speed changer.
Background
In automatic transmissions, shift control is typically performed using an electro-hydraulic system, and in order to improve safety, the solenoid valve of the hydraulic system is normally cut off when a failure is detected by the transmission control unit and cannot be handled. The hydraulic system will enter a specific safety gear to keep the vehicle still running to the service location. In the prior art, normally high solenoid valves (when power is off, the solenoid valve outputs high pressure) are generally adopted to set a specific failure gear, and the variety of required solenoid valves is increased. And a failure gear in the prior art, along with the increase of the number of gears, the speed difference of gear switching is larger in failure, and the safety gear is generally in a high-speed gear, so that the output torque is smaller.
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 system 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: a hydraulic system of an automatic transmission includes a first fail valve, a second fail valve connected to the first fail valve, a normally high solenoid valve for controlling the first fail valve, a clutch system connected to the first fail valve, and a normally low solenoid valve for controlling the second fail valve and for forming two fail gear positions.
The clutch system comprises a first clutch connected with the first control system through the first failure valve, a second clutch connected with the second control system through the first failure valve and a third clutch connected with the third control system through the first failure valve, wherein the first failure valve is provided with a first oil outlet connected with the first clutch, a second oil outlet connected with the third clutch and a third oil outlet connected with the second clutch.
The first failure valve is provided with a first oil inlet connected with a system main pressure oil way, a second oil inlet connected with the first control system, a third oil inlet connected with the second failure valve, a fourth oil inlet connected with the third control system, a fifth oil inlet connected with the second failure valve and a sixth oil inlet connected with the second control system.
When the transmission is in a low gear and works normally, a fifth oil inlet of the first failure valve is communicated with the system main pressure oil way through the second failure valve, and a third oil inlet of the first failure valve is communicated with a second oil outlet so that the third clutch can drain oil through the first failure valve and the second failure valve.
When the transmission is in a low gear and enters a failure mode, the normally-high electromagnetic valve controls the first failure valve to enter a failure state, a first oil inlet of the first failure valve is communicated with the first oil outlet, a third oil inlet of the first failure valve is communicated with the second oil outlet, the third clutch is used for draining oil through the first failure valve and the second failure valve, a fifth oil inlet of the first failure valve is communicated with the third oil outlet, and a fifth oil inlet of the first failure valve is communicated with the system main pressure oil circuit through the second failure valve, and at the moment, the first clutch and the second clutch form a failure gear.
When the transmission is in a high gear and works normally, the normally low electromagnetic valve does not work, the fifth oil inlet of the first failure valve is used for discharging oil through the second failure valve, and the third oil inlet of the first failure valve is communicated with the system main pressure oil way through the second failure valve.
When the transmission is in a high gear and enters a failure mode, the normally-high electromagnetic valve controls the first failure valve to enter a failure state, a first oil inlet of the first failure valve is communicated with the first oil outlet, a fifth oil inlet of the first failure valve is communicated with the third oil outlet, the second clutch is used for draining oil through the first failure valve and the second failure valve, a third oil inlet of the first failure valve is communicated with the second oil outlet, and the third oil inlet of the first failure valve is communicated with the main pressure oil circuit of the system through the second failure valve, and at the moment, the first clutch and the third clutch form a failure gear.
According to the hydraulic system of the automatic transmission, two failure gears are realized by adopting the normally low electromagnetic valve, the gear number is divided into the low gear stage and the high gear stage, if the hydraulic system is in the form of the low gear stage before failure, the failure gear in the low gear stage is entered during failure, and if the hydraulic system is in the form of the high gear stage before failure, the hydraulic system is in the high gear failure gear stage during failure, so that the safety performance and reliability of the automatic transmission are improved.
Drawings
The present specification includes the following drawings, the contents of which are respectively:
FIG. 1 is a schematic illustration of a hydraulic system of an automatic transmission of the present invention;
marked in the figure as: 1. a first disable valve; 101. a first oil outlet; 102. a second oil outlet; 103. a third oil outlet; 104. a first oil inlet; 105. a second oil inlet; 106. a third oil inlet; 107. a fourth oil inlet; 108. a fifth oil inlet; 109. a sixth oil inlet; 110. a control port; 2. a second disable valve; 201. a first oil port; 202. a second oil port; 203. a third oil port; 204. a fourth oil port; 205. a first control port; 206. a second control port; 207. a third control port; 3. a normally high solenoid valve; 4. a first control system; 5. a second control system; 6. a third control system; 7. a system main pressure oil circuit; 8. a normally low solenoid valve; 9. a first clutch; 10. a third clutch; 11. and a second clutch.
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.
As shown in fig. 1, the present invention provides a hydraulic system of an automatic transmission, including a first fail valve 1 (i.e., fail-safe valve, simply fail-safe valve), a second fail valve 2 (i.e., fail-safe valve, simply fail-safe valve) connected to the first fail valve 1, a normally high solenoid valve 3 (also referred to as a normally high solenoid valve) for controlling the first fail-safe valve 1, a clutch system connected to the first fail-safe valve 1, and a normally low solenoid valve 8 (also referred to as a normally low solenoid valve) for controlling the second fail-safe valve 2 and for forming two fail-safe gear positions.
Specifically, as shown in fig. 1, the clutch system includes a first clutch 9 connected to the first control system 4 through the first failure valve 1, a second clutch 11 connected to the second control system 5 through the first failure valve 1, and a third clutch 10 connected to the third control system 6 through the first failure valve 1, wherein the first clutch 9 and the third clutch 10 constitute one failure gear, and the first clutch 9 and the second clutch 11 constitute the other failure gear. The first failure valve 1 has a first oil outlet 101 connected to the first clutch 9, a second oil outlet 102 connected to the third clutch 10, and a third oil outlet 103 connected to the second clutch 11. The first control system 4 is used for enabling oil to flow to the first clutch 9, and the first control system 4 is used for controlling the combination and the separation of the first clutch 9. The second control system 5 is used for enabling oil to flow to the second clutch 11, and the second control system 5 is used for controlling the combination and the separation of the second clutch 11. The third control system 6 is used for enabling oil to flow to the third clutch 10, and the third control system 6 is used for controlling the combination and the separation of the third clutch 10. The first control system 4, the second control system 5 and the third control system 6 are capable of controlling the output pressure level when the automatic transmission is operating normally, and the first control system 4, the second control system 5 and the third control system 6 have no pressure output when the automatic transmission is disabled.
As shown in fig. 1, the first failure valve 1 has a first oil inlet 104 connected to the system main pressure oil passage 7, a second oil inlet 105 connected to the first control system 4, a third oil inlet 106 connected to the second failure valve 2, a fourth oil inlet 107 connected to the third control system 6, a fifth oil inlet 108 connected to the second failure valve 2, and a sixth oil inlet 109 connected to the second control system 5. The first deactivating valve 1 has a control port 110, the control port 110 of the first deactivating valve 1 being connected to a normally high solenoid valve 3, the normally high solenoid valve 3 outputting a high pressure in the absence of current control. The system main pressure oil passage 7 is used for outputting the main pressure of the hydraulic system, and the system main pressure oil passage 7 provides a high pressure when the automatic transmission fails. The second failure valve 2 is a two-position four-way valve, the second failure valve 2 is provided with a first oil port 201, a second oil port 202, a third oil port 203 and a fourth oil port 204, the second failure valve 2 is also provided with a first control port 205, a second control port 206 and a third control port 207, the third control port 207 of the second failure valve 2 is connected with the normally-low electromagnetic valve 8, the second control port 206 of the second failure valve 2 is connected with the third control system 6, the second control port 206 of the second failure valve 2 is connected with the fourth oil inlet 107 of the first failure valve 1, and the normally-low electromagnetic valve 8 outputs low pressure when no current is controlled.
As shown in fig. 1, the first failure valve 1 includes a right side setting force including a spring force and a control port 110 in a reaction direction to the spring force, and six oil inlets and three oil outlets, and the first failure valve 1 has two connection states:
when the pressure of the control port 110 is smaller than the opening pressure set value of the first failure valve 1, the first failure valve 1 enters a spring reset state 1_s1, at this time, the second oil inlet 105 of the first failure valve 1 is in a communication state with the first oil outlet 101, the fourth oil inlet 107 of the first failure valve 1 is in a communication state with the second oil outlet 102, the sixth oil inlet 109 of the first failure valve 1 is in a communication state with the third oil outlet 103, the first oil inlet 104 of the first failure valve 1 is connected with the system main pressure oil circuit 7, and the third oil inlet 106 and the fifth oil inlet 108 of the first failure valve 1 are connected with the second failure valve 2;
when the pressure of the control port 110 is greater than the opening pressure set value of the first failure valve 1, the first failure valve 1 enters a failure state 1_s2, at this time, the first oil inlet 104 of the first failure valve 1 is in a communication state with the first oil outlet 101, the third oil inlet 106 of the first failure valve 1 is in a communication state with the second oil outlet 102, the fifth oil inlet 108 of the first failure valve 1 is in a communication state with the third oil outlet 103, and the second oil inlet 105 of the first failure valve 1 is in a communication state with the first oil outlet 101.
As shown in fig. 1, the second fail valve 2 includes a right side setting force of the spring and the third control port 207 and the first control port 205 and the second control port 206 in a reaction direction to the spring force, and the second fail valve 2 has two connection states:
when the pressure of the first control port 205 and the second control port 206 is smaller than the opening pressure set value of the second failure valve 2, the second failure valve 2 enters a spring reset state 2_s1, at this time, the first oil port 201 and the fourth oil port 204 of the second failure valve 2 are in a communication state, and the second oil port 202 and the third oil port 203 of the second failure valve 2 are in a communication state;
when the pressures of the first control port 205 and the second control port 206 are greater than the opening pressure set value of the second failure valve 2, the second failure valve 2 enters the gear shift state 2_s2, at this time, the first port 201 and the third port 203 of the second failure valve 2 are in a communicating state, and the second port 202 and the fourth port 204 of the second failure valve 2 are in a communicating state.
As shown in fig. 1, the output port of the normally high solenoid valve 3 is connected to the control port 110 of the first failure valve 1, the output port of the first control system 4 is connected to the second oil inlet 105 of the first failure valve 1, the output port of the second control system 5 is connected to the sixth oil inlet 109 of the first failure valve 1, the output port of the third control system 6 is connected to the fourth oil inlet 107 of the first failure valve 1 and the second control port 206 of the second failure valve 2, and the output port of the system main pressure oil circuit 7 is connected to the first oil inlet 104 of the first failure valve 1 and the third oil port 203 of the second failure valve 2. The output port of the normally-low solenoid valve 8 is connected to the third control port 207 of the second failure valve 2, and the first port 201 of the second failure valve 2 is connected to the first control port 205 of the second failure valve 2. The first oil outlet 101 of the first failure valve 1 is connected with the piston cavity of the first clutch 9, the second oil outlet 102 of the first failure valve 1 is connected with the piston cavity of the third clutch 10, the third oil outlet 103 of the first failure valve 1 is connected with the piston cavity of the second clutch 11, the third oil inlet 106 of the first failure valve 1 is connected with the first oil port 201 of the second failure valve 2, and the fifth oil inlet 108 of the first failure valve 1 is connected with the second oil port 202 of the second failure valve 2.
When the vehicle is running normally, the first failure valve 1 works in a spring reset state 1_s1, the control pressure of the first control system 4 enters the first clutch 9, the control pressure of the second control system 5 enters the second clutch 11, and the control pressure of the third control system 6 enters the third clutch 10 to perform normal gear shifting control.
When the automatic transmission is in a low gear and normally works, the vehicle normally runs in a low gear area, the first failure valve 1 works in a spring reset state 1_s1, the third control system 6 outputs low pressure, the normally low electromagnetic valve 8 works, the normally low electromagnetic valve 8 and spring force reset the second failure valve 2 together, so that the second failure valve 2 is in the spring reset state 2_s1, at the moment, the fifth oil inlet 108 of the first failure valve 1 is communicated with the system main pressure oil way 7 through the second failure valve 2, the fifth oil inlet 108 of the first failure valve 1 is communicated with the second oil port 202 of the second failure valve 2, the second oil port 202 of the second failure valve 2 is communicated with the third oil port 203, the third oil port 203 is communicated with the system main pressure oil way 7, and high pressure is input; the third oil inlet 106 of the first failure valve 1 is communicated with the second oil outlet 102 so that the third clutch 10 can drain oil through the first failure valve 1 and the second failure valve 2, the third oil inlet 106 of the first failure valve 1 is communicated with the first control port 205 and the fourth oil port 204 of the second failure valve 2, and the fourth oil port 204 is communicated with an oil tank and enters low pressure.
When the automatic transmission is in a low gear and enters a failure mode, the normally high electromagnetic valve 3 works, the normally high electromagnetic valve 3 outputs high pressure, the normally high electromagnetic valve 3 controls the first failure valve 1 to enter a failure state 1_s2, the second failure valve 2 is in a spring reset state 2_s1, at the moment, a first oil inlet 104 of the first failure valve 1 is communicated with a first oil outlet 101, a first clutch 9 is connected with a system main pressure oil way 7 through a first oil inlet 104 of the first failure valve 1, and the first clutch 9 is supplied with oil by the system main pressure oil way 7; the fifth oil inlet 108 of the first failure valve 1 is communicated with the third oil outlet 103, the fifth oil inlet 108 is communicated with the system main pressure oil way 7 through the second failure valve 2, the fifth oil inlet 108 of the first failure valve 1 is communicated with the second oil port 202 of the second failure valve 2, the second oil port 202 of the second failure valve 2 is communicated with the third oil port 203, the third oil port 203 is communicated with the system main pressure oil way 7, the second clutch 11 is connected with the system main pressure oil way 7 through the fifth oil inlet 108 of the first failure valve 1 and the second failure valve 2, and the second clutch 11 is provided with oil by the system main pressure oil way 7; the third oil inlet 106 of the first failure valve 1 is communicated with the second oil outlet 102, the third oil inlet 106 of the first failure valve 1 is communicated with the first control port 205 and the fourth oil port 204 of the second failure valve 2, the fourth oil port 204 is communicated with an oil tank, the third clutch 10 is used for draining oil through the first failure valve 1 and the second failure valve 2, the first clutch 9 and the second clutch 11 form a failure gear, and the first clutch 9 and the second clutch 11 are provided with high pressure, so that the automatic transmission is hung into a low-gear failure gear, and the vehicle can still travel to a maintenance site.
When the automatic transmission is in a high gear and normally works, the vehicle normally runs in a high gear area, the first failure valve 1 works in a spring reset state 1_s1, the normally low electromagnetic valve 8 does not work, the third control port 207 of the second failure valve 2 outputs low pressure and the third control system 6 outputs high pressure, the second failure valve 2 is in a selection state 2_s2 against a set value of opening pressure of the second failure valve 2, which consists of spring force and the third control port 207, at the moment, the fifth oil inlet 108 of the first failure valve 1 is used for draining oil through the second failure valve 2, the fifth oil inlet 108 of the first failure valve 1 is communicated with the second oil port 202 of the second failure valve 2, the second oil port 202 and the fourth oil port 204 of the second failure valve 2 are communicated with an oil tank, and the fourth oil port 204 is communicated with the oil tank and enters low pressure; the third oil inlet 106 of the first failure valve 1 is communicated with the system main pressure oil way 7 through the second failure valve 2, the third oil inlet 106 of the first failure valve 1 is communicated with the first oil port 201 of the second failure valve 2, the first oil port 201 of the second failure valve 2 is communicated with the third oil port 203, the third oil port 203 is communicated with the system main pressure oil way 7, and high pressure is entered.
When the automatic transmission is in a high gear and enters a failure mode, the normally high electromagnetic valve 3 outputs high pressure, the normally high electromagnetic valve 3 controls the first failure valve 1 to enter a failure state 1_s2, the normally low electromagnetic valve 8 does not work, the second failure valve 2 is in a selection state 2_s2, at the moment, a first oil inlet 104 of the first failure valve 1 is communicated with a first oil outlet 101, a first clutch 9 is connected with a system main pressure oil way 7 through a first oil inlet 104 of the first failure valve 1, and the first clutch 9 is provided with oil by the system main pressure oil way 7; the third oil inlet 106 of the first failure valve 1 is communicated with the second oil outlet 102, the third oil inlet 106 is communicated with the system main pressure oil way 7 through the second failure valve 2, the third oil inlet 106 of the first failure valve 1 is communicated with the first oil port 201 of the second failure valve 2, the first oil port 201 of the second failure valve 2 is communicated with the third oil port 203, the third oil port 203 is communicated with the system main pressure oil way 7, the third clutch 10 is connected with the system main pressure oil way 7 through the third oil inlet 106 of the first failure valve 1 and the second failure valve 2, and the third clutch 10 is provided with oil by the system main pressure oil way 7; the fifth oil inlet 108 of the first failure valve 1 is communicated with the third oil outlet 103, the second clutch 11 is used for draining through the first failure valve 1 and the second failure valve 2, the fifth oil inlet 108 of the first failure valve 1 is communicated with the second oil port 202 of the second failure valve 2, the second oil port 202 is communicated with the fourth oil port 204, the fourth oil port 204 is communicated with an oil tank, the second clutch 11 is used for draining through the first failure valve 1 and the second failure valve 2, at the moment, the first clutch 9 and the third clutch 10 form a failure gear, and the first clutch 9 and the third clutch 10 are provided with high pressure, so that the automatic transmission is hung into a high-gear failure gear, and the vehicle can still travel to a maintenance site.
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 (1)
1. A hydraulic system of an automatic transmission comprising a first fail valve, a second fail valve connected to the first fail valve, a normally high solenoid valve for controlling the first fail valve, and a clutch system connected to the first fail valve, characterized in that: the system further comprises a normally-low solenoid valve for controlling the second failure valve and for forming two failure gears;
the clutch system comprises a first clutch connected with the first control system through a first failure valve, a second clutch connected with the second control system through the first failure valve and a third clutch connected with the third control system through the first failure valve, wherein the first clutch and the third clutch form one failure gear, and the first clutch and the second clutch form the other failure gear; the system main pressure oil circuit is used for outputting main pressure of the hydraulic system, and the system main pressure oil circuit provides high pressure when the automatic transmission fails;
the first failure valve is provided with a first oil outlet connected with the first clutch, a second oil outlet connected with the third clutch and a third oil outlet connected with the second clutch; the first control system is used for enabling oil to flow to the first clutch, and is used for controlling the combination and separation of the first clutch; the second control system is used for enabling oil to flow to the second clutch, and is used for controlling the combination and separation of the second clutch; the third control system is used for enabling oil to flow to the third clutch, and is used for controlling the combination and separation of the third clutch; the first control system, the second control system and the third control system can control the output pressure when the automatic transmission works normally, and the first control system, the second control system and the third control system have no pressure output when the automatic transmission fails;
the first failure valve is provided with a first oil inlet connected with a system main pressure oil way, a second oil inlet connected with the first control system, a third oil inlet connected with the second failure valve, a fourth oil inlet connected with the third control system, a fifth oil inlet connected with the second failure valve and a sixth oil inlet connected with the second control system; the first failure valve is provided with a control port, the control port of the first failure valve is connected with a normally high electromagnetic valve, and the normally high electromagnetic valve outputs high pressure when no current is controlled;
the second failure valve is a two-position four-way valve, the second failure valve is provided with a first oil port, a second oil port, a third oil port and a fourth oil port, the second failure valve is also provided with a first control port, a second control port and a third control port, the third control port of the second failure valve is connected with a normally low electromagnetic valve, the second control port of the second failure valve is connected with a third control system, the second control port of the second failure valve is connected with a fourth oil inlet of the first failure valve, and the normally low electromagnetic valve outputs low pressure when no current is controlled;
when the pressure of the control port is smaller than the opening pressure set value of the first failure valve, the first failure valve enters a spring reset state 1_s1, at the moment, a second oil inlet and a first oil outlet of the first failure valve are in a communication state, a fourth oil inlet and a second oil outlet of the first failure valve are in a communication state, a sixth oil inlet and a third oil outlet of the first failure valve are in a communication state, the first oil inlet of the first failure valve is connected with a system main pressure oil circuit, and a third oil inlet and a fifth oil inlet of the first failure valve are connected with the second failure valve;
when the pressure of the control port is larger than the opening pressure set value of the first failure valve, the first failure valve enters a failure state 1_s2, at the moment, the first oil inlet and the first oil outlet of the first failure valve are in a communication state, the third oil inlet and the second oil outlet of the first failure valve are in a communication state, the fifth oil inlet and the third oil outlet of the first failure valve are in a communication state, and the second oil inlet and the first oil outlet of the first failure valve are in a communication state;
the second fail valve includes a right side set force including a spring and a third control port and first and second control ports reacting with the spring force, the second fail valve having two connected states:
when the pressure of the first control port and the second control port is smaller than the opening pressure set value of the second failure valve, the second failure valve enters a spring reset state 2_s1, at the moment, the first oil port and the fourth oil port of the second failure valve are in a communication state, and the second oil port and the third oil port of the second failure valve are in a communication state;
when the pressure of the first control port and the second control port is larger than the opening pressure set value of the second failure valve, the second failure valve enters a gear switching state 2_s2, at the moment, the first oil port and the third oil port of the second failure valve are in a communication state, and the second oil port and the fourth oil port of the second failure valve are in a communication state;
the output port of the normally high electromagnetic valve is connected with the control port of the first failure valve, the output port of the first control system is connected with the second oil inlet of the first failure valve, the output port of the second control system is connected with the sixth oil inlet of the first failure valve, the output port of the third control system is connected with the fourth oil inlet of the first failure valve and the second control port of the second failure valve, and the output port of the main pressure oil circuit of the system is connected with the first oil inlet of the first failure valve and the third oil port of the second failure valve; the output port of the normally-low electromagnetic valve is connected with the third control port of the second failure valve, and the first oil port of the second failure valve is connected with the first control port of the second failure valve; the first oil outlet of the first failure valve is connected with the piston cavity of the first clutch, the second oil outlet of the first failure valve is connected with the piston cavity of the third clutch, the third oil outlet of the first failure valve is connected with the piston cavity of the second clutch, the third oil inlet of the first failure valve is connected with the first oil port of the second failure valve, and the fifth oil inlet of the first failure valve is connected with the second oil port of the second failure valve;
when the automatic transmission is in a low gear and normally works, the vehicle normally runs in a low gear area, the first failure valve works in a spring reset state 1_s1, the third control system outputs low pressure, the normally low electromagnetic valve works, the normally low electromagnetic valve and spring force reset the second failure valve together, so that the second failure valve is in a spring reset state 2_s1, at the moment, a fifth oil inlet of the first failure valve is communicated with a system main pressure oil way through the second failure valve, a fifth oil inlet of the first failure valve is communicated with a second oil port of the second failure valve, a second oil port of the second failure valve is communicated with a third oil port, the third oil port of the second failure valve is communicated with the system main pressure oil way, and high pressure is entered; the third oil inlet of the first failure valve is communicated with the second oil outlet so that the third clutch can drain oil through the first failure valve and the second failure valve, the third oil inlet of the first failure valve is communicated with the first control port and the fourth oil port of the second failure valve, the fourth oil port is communicated with the oil tank, and low pressure is entered;
when the automatic transmission is in a low gear and enters a failure mode, a normally high electromagnetic valve works, the normally high electromagnetic valve outputs high pressure, the normally high electromagnetic valve controls a first failure valve to enter a failure state 1_s2, a second failure valve is in a spring reset state 2_s1, at the moment, a first oil inlet of the first failure valve is communicated with a first oil outlet, a first clutch is connected with a system main pressure oil way through a first oil inlet of the first failure valve, and the first clutch is supplied with oil by the system main pressure oil way; the second clutch is connected with the system main pressure oil way through the fifth oil inlet of the first failure valve and the second failure valve, and the second clutch is provided with oil by the system main pressure oil way; the third oil inlet of the first failure valve is communicated with the second oil outlet, the third oil inlet of the first failure valve is communicated with the first control port and the fourth oil port of the second failure valve, the fourth oil port is communicated with the oil tank, the third clutch is used for draining oil through the first failure valve and the second failure valve, the first clutch and the second clutch form a failure gear, and the first clutch and the second clutch are provided with high pressure, so that the automatic transmission is hung into a low-gear failure gear, and the vehicle can still travel to a maintenance site;
when the automatic transmission is in a high gear and enters a failure mode, a normally high electromagnetic valve outputs high pressure, the normally high electromagnetic valve controls a first failure valve to enter a failure state 1_s2, a normally low electromagnetic valve does not work, a second failure valve is in a gear switching state 2_s2, at the moment, a first oil inlet of the first failure valve is communicated with a first oil outlet, a first clutch is connected with a system main pressure oil way through a first oil inlet of the first failure valve, and the first clutch is supplied with oil by the system main pressure oil way; the third oil inlet of the first failure valve is communicated with the second oil outlet and the third oil inlet is communicated with a system main pressure oil way through the second failure valve, the third oil inlet of the first failure valve is communicated with the first oil port of the second failure valve, the first oil port of the second failure valve is communicated with the third oil port and the third oil port of the second failure valve is communicated with the system main pressure oil way, the third clutch is connected with the system main pressure oil way through the third oil inlet of the first failure valve and the second failure valve, and the third clutch is used for providing oil by the system main pressure oil way; the fifth oil inlet of the first failure valve is communicated with the third oil outlet, the second clutch is used for draining oil through the first failure valve and the second failure valve, the fifth oil inlet of the first failure valve is communicated with the second oil inlet of the second failure valve, the second oil inlet of the first failure valve is communicated with the fourth oil inlet of the second failure valve, the fourth oil inlet of the first failure valve is communicated with the oil tank, the second clutch is used for draining oil through the first failure valve and the second failure valve, at the moment, the first clutch and the third clutch form a failure gear, and the first clutch and the third clutch are provided with high pressure, so that the automatic transmission is hung into a high-grade failure gear, and the vehicle can still travel to a maintenance place;
when the automatic transmission is in a high gear and normally works, the vehicle normally runs in a high gear area, the first failure valve works in a spring reset state 1_s1, the normally low electromagnetic valve does not work, the third control port of the second failure valve outputs low pressure and the third control system outputs high pressure, the opening pressure set value consisting of spring force and the third control port of the second failure valve is overcome, the second failure valve is in a gear switching state 2_s2, at the moment, the fifth oil inlet of the first failure valve is used for draining oil through the second failure valve, the fifth oil inlet of the first failure valve is communicated with the second oil port of the second failure valve, the second oil port of the second failure valve is communicated with the fourth oil port, the fourth oil port is communicated with the oil tank, and the low pressure is entered; the third oil inlet of the first failure valve is communicated with a system main pressure oil way through the second failure valve, the third oil inlet of the first failure valve is communicated with the first oil port of the second failure valve, the first oil port of the second failure valve is communicated with the third oil port, and the third oil port is communicated with the system main pressure oil way and enters high pressure.
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| CN110594405B (en) * | 2019-09-26 | 2024-03-29 | 吉孚汽车技术(苏州)有限公司 | Hydraulic control device for automatic transmission |
| CN110925418B (en) * | 2020-02-19 | 2020-07-10 | 盛瑞传动股份有限公司 | Electromagnetic valve fault processing method based on automatic transmission control software |
| CN112096853B (en) * | 2020-09-11 | 2021-11-09 | 陕西法士特齿轮有限责任公司 | Safety valve mechanism, system and control method for hydraulic automatic gear shifting system |
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| CN102007326A (en) * | 2008-09-30 | 2011-04-06 | 爱信艾达株式会社 | Hydraulic control apparatus for automatic transmission |
| CN102378870A (en) * | 2009-07-28 | 2012-03-14 | 爱信艾达株式会社 | Hydraulic control device for automatic transmission |
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