Parking hydraulic system
By designing a specific oil circuit connection and valve core reset mechanism for parking hydraulic system, the sudden parking problem caused by pilot solenoid valve failure is solved to ensure the safe operation of the vehicle.
Patent Information
- Application Number
- CN202010760410.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-07-31
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2040-07-31
AI Technical Summary
When the pilot solenoid valve fails, the vehicle may stop suddenly, resulting in safety risks. It is difficult for the prior art to effectively avoid such parking situations.
A parking hydraulic system is designed, including a parking control valve, a parking valve, a parking retaining valve and a clutch oil supply control valve. Through specific oil circuit connections and valve core reset mechanisms, ensuring that even if the pilot control valve fails, The vehicle system can remain activated to prevent sudden stops.
Even if the pilot control valve fails, the parking control valve, parking retaining valve and clutch oil supply control valve can still remain activated, avoiding the vehicle's sudden stop and improving safety.
Smart Images
Figure CN111895078B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of transmission technology, and in particular to a parking hydraulic system. Background Art
[0002] When the vehicle enters the driving gear, if the pilot solenoid valve fails, the pilot solenoid valve will enter the closed state. At this time, the oil pressure of the pilot control oil circuit will decrease or even disappear, and the oil pressure of the parking control valve and the clutch oil supply control valve connected to the parking hold valve will also decrease or even disappear, and the parking valve will enter the stop opening state, causing the vehicle to stop suddenly. If the vehicle stops suddenly, it is very likely to put the vehicle in danger. Therefore, the parking situation caused by the failure of the pilot solenoid valve must be avoided. Summary of the invention
[0003] The object of the present invention is to provide a parking hydraulic system which can prevent sudden parking caused by damage of a pilot solenoid valve.
[0004] The above-mentioned parking hydraulic system includes a parking control valve, a parking valve, a parking holding valve and a clutch oil supply control valve; the control valve oil inlet of the parking control valve is connected to the main oil circuit, and the control valve oil outlet of the parking control valve is connected to the parking valve oil inlet of the parking valve; the pilot oil circuit oil inlet of the parking holding valve is connected to the pilot control oil circuit, the holding valve oil outlet of the parking holding valve is connected to the control valve control port of the parking control valve, and the clutch oil circuit oil inlet of the parking holding valve and the holding valve control port of the parking holding valve are both connected to the clutch control oil circuit; the oil supply control valve oil inlet of the clutch oil supply control valve is connected to the main oil circuit, the oil supply control valve oil outlet of the clutch oil supply control valve is connected to the clutch control valve oil supply oil circuit, the first oil supply control valve control port of the clutch oil supply control valve is connected to the holding valve oil outlet of the parking holding valve, and the second oil supply control valve control port of the clutch oil supply control valve is connected to the clutch control oil circuit.
[0005] Optionally, the oil outlet of the control valve is located between the control port of the control valve and the oil inlet of the control valve.
[0006] Optionally, the pilot oil circuit oil inlet and the holding valve oil outlet are located between the holding valve control port and the clutch oil circuit oil inlet, and the pilot oil circuit oil inlet is located between the holding valve oil outlet and the holding valve control port.
[0007] Optionally, the first control port of the oil supply control valve and the oil outlet of the oil supply control valve are located between the second control port of the oil supply control valve and the oil inlet of the oil supply control valve, and the oil outlet of the oil supply control valve is located between the first control port of the oil supply control valve and the oil inlet of the oil supply control valve.
[0008] Optionally, a control valve core and a first return spring are provided in the inner cavity of the parking control valve, and one end of the control valve core is plugged into the first return spring.
[0009] Optionally, the inner cavity of the parking holding valve is provided with a holding valve core and a second return spring, and one end of the holding valve core is plugged into the second return spring.
[0010] Optionally, the inner cavity of the clutch oil supply control valve is provided with an oil supply control valve core and a third return spring, and one end of the oil supply control valve core is plugged into the third return spring.
[0011] The technical solution provided by the embodiment of the present invention has the following advantages compared with the prior art:
[0012] Even if the pilot control valve fails, the parking control valve, the parking hold valve and the clutch oil supply control valve can still remain in the started state, so that the parking valve will not enter the closed state and stop suddenly. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.
[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0015] Figure 1 is a schematic diagram of the parking hydraulic system of the present invention when parking;
[0016] Figure 2 It is a schematic diagram of the parking hydraulic system of the present invention when releasing the parking;
[0017] Figure 3 It is a schematic diagram of the parking hydraulic system in the present invention when the pilot solenoid valve is damaged;
[0018] Figure 4 is a schematic diagram of a parking control valve in the present invention;
[0019] Figure 5 is a schematic diagram of a parking valve in the present invention;
[0020] Figure 6 is a schematic diagram of a parking holding valve in the present invention;
[0021] Figure 7 It is a schematic diagram of the clutch oil supply control valve in the present invention.
[0022] Among them, 1. parking control valve; 11. control valve oil inlet; 12. control valve oil outlet; 13. control valve control port; 14. control valve spool; 15. first return spring; 2. parking valve; 21. parking valve oil inlet; 3. parking holding valve; 31. pilot oil circuit oil inlet; 32. holding valve oil outlet; 33. clutch oil circuit oil inlet; 34. holding valve control port; 35. holding valve spool; 36. second return spring; 4. clutch oil supply control valve; 41. oil supply control valve oil inlet; 42. oil supply control valve oil outlet; 43. first control port of oil supply control valve; 44. second control port of oil supply control valve; 45. oil supply control valve spool; 46. third return spring. DETAILED DESCRIPTION
[0023] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.
[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.
[0025] like Figures 1 to 7 As shown, the parking hydraulic system provided by the present invention includes a parking control valve 1, a parking valve 2, a parking holding valve 3 and a clutch oil supply control valve 4. The control valve oil inlet 11 of the parking control valve 1 is connected to the main oil circuit, and the control valve oil outlet 12 of the parking control valve 1 is connected to the parking valve oil inlet 21 of the parking valve 2. The pilot oil circuit oil inlet 31 of the parking holding valve 3 is connected to the pilot control oil circuit, the holding valve oil outlet 32 of the parking holding valve 3 is connected to the control valve control port 13 of the parking control valve 1, and the clutch oil circuit oil inlet 33 of the parking holding valve 3 and the holding valve control port 34 of the parking holding valve 3 are both connected to the clutch control oil circuit. The oil supply control valve oil inlet 41 of the clutch oil supply control valve 4 is connected to the main oil circuit, the oil supply control valve oil outlet 42 of the clutch oil supply control valve 4 is connected to the clutch control valve oil supply oil circuit, the oil supply control valve first control port 43 of the clutch oil supply control valve 4 is connected to the holding valve oil outlet 32 of the parking holding valve 3, and the oil supply control valve second control port 44 of the clutch oil supply control valve 4 is connected to the clutch control oil circuit.
[0026] In the present invention, Figure 1 As shown, when the vehicle is in the parking gear, the parking valve 2 is in a closed state (ie, the parking valve spool is not pushed), there is no pressure in the pilot control oil circuit, the hydraulic valve is in a closed state, and the oil in the main oil circuit cannot enter the parking valve 2.
[0027] In this embodiment, if Figure 2 As shown, when the clutch is started, the pilot control oil circuit is pressurized, and the pilot oil circuit oil inlet 31 of the parking holding valve 3 is connected to the holding valve oil outlet 32, so that the hydraulic oil of the pilot control oil circuit can enter the control valve control port 13 of the parking control valve 1 and the first control port 43 of the oil supply control valve of the clutch oil supply control valve 4 respectively. The hydraulic oil enters the control valve control port 13 of the parking control valve 1, and the control valve oil inlet 11 and the control valve oil outlet 12 of the parking control valve 1 are connected. The hydraulic oil of the main oil circuit can enter the parking valve oil inlet 21 of the parking valve 2 through the parking control valve 1, so that the parking valve spool is pushed, the closed state of the parking valve 2 begins to be released, and the parking gear of the vehicle also begins to be released. The hydraulic oil enters the first control port 43 of the clutch oil supply control valve 4, the oil supply control valve oil inlet 41 and the oil supply control valve oil outlet 42 are connected, and the hydraulic oil of the main oil circuit can enter the clutch control valve oil supply circuit through the clutch oil supply control valve 4.
[0028] In this embodiment, if Figure 3 As shown, when the pilot control valve of the pilot control oil circuit fails, the hydraulic oil of the pilot control oil circuit cannot enter the pilot oil circuit oil inlet 31, and the parking holding valve 3 cannot be started normally, so that the hydraulic oil of the main oil circuit cannot enter the parking valve 2. At this time, the clutch control oil circuit can inject hydraulic oil into the holding valve control port 34 of the parking holding valve 3 and the second control port 44 of the clutch oil supply control valve 4 (also supply oil to the clutch oil circuit oil inlet 33). On the one hand, the hydraulic oil is injected into the parking holding valve 3 through the holding valve control port 34, the clutch oil circuit oil inlet 33 is connected with the holding valve oil outlet 32, and the hydraulic oil from the clutch control oil circuit enters the control valve control port 13 of the parking control valve 1 through the parking holding valve 3; the control valve oil inlet 11 and the control valve oil outlet 12 are connected again, and the hydraulic oil of the main oil circuit enters the parking valve oil inlet 21 through the parking control valve 1, so that the parking valve 2 is maintained in the started state. On the other hand, the hydraulic oil is injected into the clutch oil supply control valve 4 through the second control port 44 of the oil supply control valve, so that the oil supply control valve oil inlet 41 and the oil supply control valve oil outlet 42 are connected again, and the hydraulic oil of the main oil circuit can enter the clutch control valve oil supply oil circuit through the clutch oil supply control valve 4. Therefore, even if the pilot control valve fails, the parking control valve 1, the parking holding valve 3 and the clutch oil supply control valve 4 can still maintain the start state, so that the parking valve 2 will not enter the closed state and stop suddenly.
[0029] It should be noted that, as is well known to those skilled in the art, the parking control valve 1, the parking holding valve 3, the clutch oil supply control valve 4 and the parking valve 2 in the present invention are all common hydraulic valves or mechanical valves in the field, and the present invention will not elaborate on the specific structure of the above-mentioned hydraulic valves and how to realize the opening and closing of each interface; of course, the main oil circuit, the pilot control oil circuit, the clutch control oil circuit and the clutch control valve oil supply oil circuit are also conventional oil circuit systems in the field, and the present invention will not elaborate on the structure and function of the above-mentioned oil circuits.
[0030] like Figure 4 As shown, in one embodiment of the present invention, the control valve oil outlet 12 is located between the control valve control port 13 and the control valve oil inlet 11 .
[0031] In the present invention, when the control valve control port 13 is activated, the control valve oil inlet 11 and the control valve oil outlet 12 are connected, so that the hydraulic oil of the main oil circuit can enter the parking valve 2 through the control valve oil inlet 11 and the control valve oil outlet 12. When the control valve control port 13 is closed, the control valve oil inlet 11 and the control valve oil outlet 12 are not connected.
[0032] like Figure 6 As shown, in one embodiment of the present invention, the pilot oil circuit oil inlet 31 and the holding valve oil outlet 32 are located between the holding valve control port 34 and the clutch oil circuit oil inlet 33, and the pilot oil circuit oil inlet 31 is located between the holding valve oil outlet 32 and the holding valve control port 34.
[0033] In this embodiment, when the pilot oil circuit inlet 31 is opened, the holding valve oil outlet 32 is also opened, and the pilot oil circuit inlet 31 is connected to the holding valve oil outlet 32, but the holding valve control port 34 and the clutch oil circuit inlet 33 are closed. When the holding valve control port 34 is activated, the pilot oil circuit inlet 31 is closed, the clutch oil circuit inlet 33 and the holding valve oil outlet 32 are opened, and the clutch oil circuit inlet 33 and the holding valve oil outlet 32 are connected.
[0034] like Figure 7 As shown, in one embodiment of the present invention, the first control port 43 of the oil supply control valve and the oil outlet 42 of the oil supply control valve are located between the second control port 44 of the oil supply control valve and the oil inlet 41 of the oil supply control valve, and the oil outlet 42 of the oil supply control valve is located between the first control port 43 of the oil supply control valve and the oil inlet 41 of the oil supply control valve.
[0035] In this embodiment, when the first control port 43 of the oil supply control valve and the second control port 44 of the oil supply control valve are closed, the oil inlet 41 of the oil supply control valve will be closed. When the first control port 43 of the oil supply control valve is opened, the oil outlet 42 of the oil supply control valve will be opened, and the oil inlet 41 of the oil supply control valve and the oil outlet 42 of the oil supply control valve are connected. When the second control port 44 of the oil supply control valve is opened, the oil outlet 42 of the oil supply control valve will be opened, and the oil inlet 41 of the oil supply control valve and the oil outlet 42 of the oil supply control valve are connected.
[0036] like Figure 4 As shown, in one embodiment of the present invention, a control valve core 14 and a first return spring 15 are provided in the inner cavity of the parking control valve 1 , and one end of the control valve core 14 is plugged into the first return spring 15 .
[0037] In this embodiment, when there is no oil pressure at the control port 13 of the control valve, the control valve core 14 can be reset by the first reset spring 15. One end of the control valve core 14 is plugged with the reset spring so that the two are stably connected. Of course, the control valve core 14 and the first reset spring 15 can be common structures in the art, and the present invention will not be repeated here.
[0038] like Figure 6 As shown, in one embodiment of the present invention, the inner cavity of the parking holding valve 3 is provided with a holding valve core 35 and a second return spring 36 , and one end of the holding valve core 35 is plugged into the second return spring 36 .
[0039] In the present invention, when there is no oil pressure at the holding valve control port 34, the holding valve core 35 is reset by the second return spring 36. One end of the holding valve core 35 is plugged into the second return spring 36 to ensure a stable connection between the two. Of course, the holding valve core 35 and the second return spring 36 can be common structures in the art, and the present invention will not be repeated here.
[0040] like Figure 7 As shown, in one embodiment of the present invention, the inner cavity of the clutch oil supply control valve 4 is provided with an oil supply control valve core 45 and a third return spring 46 , and one end of the oil supply control valve core 45 is plugged into the third return spring 46 .
[0041] In this embodiment, when there is no oil pressure at the first control port 43 and the second control port 44 of the oil supply control valve, the oil supply control valve core 45 is reset by the third reset spring 46. One end of the oil supply control valve core 45 is plugged into the third reset spring 46 to ensure a stable connection between the two. Of course, the oil supply control valve core 45 and the third reset spring 46 can be common structures in the art, and the present invention will not be repeated here.
[0042] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0043] The above are only specific embodiments of the present invention, which enable those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments herein, but will conform to the widest scope consistent with the principles and novel features invented herein.
Claims
1. A parking hydraulic system, characterized in that: It comprises a parking control valve (1), a parking valve (2), a parking holding valve (3) and a clutch oil supply control valve (4); The control valve oil inlet (11) of the parking control valve (1) is in communication with the main oil circuit, and the control valve oil outlet (12) of the parking control valve (1) is in communication with the parking valve oil inlet (21) of the parking valve (2); The pilot oil circuit oil inlet (31) of the parking holding valve (3) is in communication with the pilot control oil circuit, the holding valve oil outlet (32) of the parking holding valve (3) is in communication with the control valve control port (13) of the parking control valve (1), and the clutch oil circuit oil inlet (33) of the parking holding valve (3) and the holding valve control port (34) of the parking holding valve (3) are both in communication with the clutch control oil circuit; The oil supply control valve oil inlet (41) of the clutch oil supply control valve (4) is in communication with the main oil circuit, the oil supply control valve oil outlet (42) of the clutch oil supply control valve (4) is in communication with the clutch control valve oil supply oil circuit, the oil supply control valve first control port (43) of the clutch oil supply control valve (4) is in communication with the holding valve oil outlet (32) of the parking holding valve (3), and the oil supply control valve second control port (44) of the clutch oil supply control valve (4) is in communication with the clutch control oil circuit; The control valve oil outlet (12) is located between the control valve control port (13) and the control valve oil inlet (11). When the control valve control port (13) is activated, the control valve oil inlet (11) and the control valve oil outlet (12) are connected, so that the hydraulic oil of the main oil circuit can enter the parking valve (2) through the control valve oil inlet (11) and the control valve oil outlet (12). When the control valve control port (13) is closed, the control valve oil inlet (11) and the control valve oil outlet (12) are not connected. The pilot oil circuit oil inlet (31) and the holding valve oil outlet (32) are located between the holding valve control port (34) and the clutch oil circuit oil inlet (33), and the pilot oil circuit oil inlet (31) is located between the holding valve oil outlet (32) and the holding valve control port (34); When the pilot oil circuit inlet (31) is opened, the holding valve oil outlet (32) is also opened, and the pilot oil circuit inlet (31) is connected to the holding valve oil outlet (32), but the holding valve control port (34) and the clutch oil circuit inlet (33) are closed. When the holding valve control port (34) is activated, the pilot oil circuit inlet (31) is closed, the clutch oil circuit inlet (33) and the holding valve oil outlet (32) are opened, and the clutch oil circuit inlet (33) and the holding valve oil outlet (32) are connected. The first control port (43) of the oil supply control valve and the oil outlet (42) of the oil supply control valve are located between the second control port (44) of the oil supply control valve and the oil inlet (41) of the oil supply control valve, and the oil outlet (42) of the oil supply control valve is located between the first control port (43) of the oil supply control valve and the oil inlet (41) of the oil supply control valve; When the first control port (43) of the oil supply control valve and the second control port (44) of the oil supply control valve are closed, the oil inlet (41) of the oil supply control valve will be closed; when the first control port (43) of the oil supply control valve is opened, the oil outlet (42) of the oil supply control valve will be opened, and the oil inlet (41) of the oil supply control valve and the oil outlet (42) of the oil supply control valve will be communicated; when the second control port (44) of the oil supply control valve is opened, the oil outlet (42) of the oil supply control valve will be opened, and the oil inlet (41) of the oil supply control valve and the oil outlet (42) of the oil supply control valve will be communicated.
2. The parking hydraulic system according to claim 1, characterized in that: A control valve core (14) and a first return spring (15) are arranged in the inner cavity of the parking control valve (1), and one end of the control valve core (14) is plugged into the first return spring (15).
3. The parking hydraulic system according to claim 1, characterized in that: The inner cavity of the parking holding valve (3) is provided with a holding valve core (35) and a second return spring (36), and one end of the holding valve core (35) is plugged into the second return spring (36).
4. The parking hydraulic system according to claim 1, characterized in that: The inner cavity of the clutch oil supply control valve (4) is provided with an oil supply control valve core (45) and a third return spring (46), and one end of the oil supply control valve core (45) is plugged into the third return spring (46).