CN212272345U - Two-stage variable control system capable of avoiding temperature rise interference - Google Patents
Two-stage variable control system capable of avoiding temperature rise interference Download PDFInfo
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- CN212272345U CN212272345U CN202021190506.0U CN202021190506U CN212272345U CN 212272345 U CN212272345 U CN 212272345U CN 202021190506 U CN202021190506 U CN 202021190506U CN 212272345 U CN212272345 U CN 212272345U
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 37
- 238000012546 transfer Methods 0.000 claims abstract description 34
- 239000003921 oil Substances 0.000 claims description 157
- 239000010705 motor oil Substances 0.000 claims description 22
- 238000013016 damping Methods 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
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Abstract
The utility model provides a two-stage variable control system for avoiding temperature rise interference, including single chamber feedback variable displacement vane pump, main oil duct, oil pan, pilot valve, solenoid valve, the pilot valve includes valve barrel, case and spring, the case is whole to be "worker" font, including shaft-like portion and set up first disc and the second disc at shaft-like portion both ends respectively, form the spring chamber between the terminal surface of first disc and the valve barrel, form the control chamber between the terminal surface of second disc and the valve barrel, form the transfer room between shaft-like portion and the valve barrel inner wall; the control cavity is always connected with the pump outlet or the main oil gallery, the transfer chamber is connected with the main oil gallery through an electromagnetic valve, and the spring cavity is always connected with the pump outlet or the main oil gallery; the valve sleeve is provided with a feedback oil passage interface for connecting the feedback pressure oil cavity. The control system can avoid the delay opening of the pilot valve and ensure the control precision of the whole control system.
Description
Technical Field
The utility model relates to an internal-combustion engine lubricating system technical field, especially a control system of single chamber feedback variable displacement vane pump for internal-combustion engine lubrication.
Background
With the increasing development and popularization of the variable displacement technology of the engine lubricating system oil pump, the vane type oil pump is widely applied, the existing vane pump comprises two variable forms of single-acting cavity feedback and double-acting cavity feedback, wherein the single-acting cavity feedback can be designed into a one-stage variable displacement mode, MAP control can be realized through an electro-hydraulic proportional control valve, and the double-acting cavity feedback can be designed into a two-stage variable displacement mode.
The control system of the single-cavity two-stage variable displacement vane pump provided by the prior art generally uses an electromagnetic valve and a mechanical valve, the oil circuit design is generally complex, in the stage of two-stage variable displacement, the oil flow of the whole system is in a high-speed working condition, the high-speed flow of the oil inevitably leads to temperature rise, the dynamic viscosity mu of the oil is reduced along with the temperature rise, the oil pressure with the same flow is correspondingly reduced, the time for the oil pressure to push a valve core of the mechanical valve to move and open is prolonged, and the variable response speed of the oil pump is correspondingly delayed.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a two-stage variable control system who avoids temperature rise to disturb, ensures whole control system's control accuracy.
In order to solve the technical problem, the technical scheme of the utility model is that: a two-stage variable control system for avoiding temperature rise interference comprises a single-cavity feedback variable displacement vane pump, a pump outlet, a safety valve, a main oil duct, an oil pan, an electromagnetic valve and a pilot valve, wherein the single-cavity feedback variable displacement vane pump comprises a pump body, a feedback pressure oil cavity, a rotor, a variable slider and a variable spring, and the pilot valve comprises a valve sleeve, a valve core and a spring; the valve core is integrally I-shaped and comprises a rod-shaped part, a first disc and a second disc, wherein the first disc and the second disc are respectively arranged at two ends of the rod-shaped part, the diameters of the first disc and the second disc are the same, a spring cavity is formed between the end surface of the first disc and the valve sleeve, a control cavity is formed between the end surface of the second disc and the valve sleeve, and a transfer chamber is formed between the rod-shaped part and the inner wall of the valve sleeve; the control cavity is always connected with the pump outlet or the main oil gallery through an oil way, the spring cavity is always connected with the pump outlet or the main oil gallery through a damping hole, and the transfer chamber is connected with the main oil gallery through an electromagnetic valve; the side wall of the valve sleeve is provided with a feedback oil duct interface for connecting a feedback pressure oil cavity, the movement of the valve core in the valve sleeve is controlled through spring force and engine oil pressure, and the feedback oil duct interface is alternatively in two states of being communicated with the transfer chamber or the control cavity along with the different positions of the valve core in the valve sleeve, so that the on-off of the transfer chamber or the control cavity and the feedback pressure oil cavity is realized; the port P of the electromagnetic valve is communicated with the main oil gallery, the port A is communicated with a transfer chamber of the pilot valve, the port T is communicated with an oil pan, and the port A can be communicated with the port P or the port T under the control of the ECU.
In the technical scheme, the spring cavity of the pilot valve is always connected with the outlet of the pump or the main oil duct through the damping hole, so that the spring force in the spring cavity acts on the first disc of the valve core, and the oil pressure coming from the damping hole acts on the first disc of the valve core to form mixed supporting force on the valve core. The magnitude of the pressure of the hybrid support force is self-adjusting as the system pressure changes, as compared to a single spring support force. Because the control chamber of pilot valve and the pressure oil in the spring chamber are all from pump outlet or main oil gallery, therefore, in the unchangeable displacement stage, the oil pressure of control chamber and spring chamber is equal, when the oil pressure continues to rise, because the existence of damping hole, the oil pressure that gets into in the control chamber must be greater than the oil pressure in spring chamber, the pressure oil in the control chamber just can push the case and move to the spring chamber, along with the rising of pressure, the temperature of pressure oil also can correspondingly rise, and when the temperature rises, the oil pressure in the control chamber will reduce to some extent, the oil pressure in the spring chamber also will reduce to some extent, just so can not influence the opening time of pilot valve.
The working process of the utility model comprises the following two stages: in the first-stage variable displacement stage, under the control of an ECU, a port P of an electromagnetic valve is communicated with a port A, and pressure oil in a main oil duct enters a transfer chamber of a pilot valve through the electromagnetic valve; when the engine oil pressure of the main oil duct reaches a set low-pressure variable pressure point, the engine oil pressure of the main oil duct enters the feedback pressure oil cavity through the transfer chamber and directly acts on the variable slide block, so that the eccentricity between the variable slide block and the rotor is reduced, and the output displacement is reduced;
when the electromagnetic valve is switched to another working state under the control of the ECU, the port P of the electromagnetic valve is not communicated with the port A, the port A of the electromagnetic valve is communicated with the port T, pressure oil in a transfer chamber of the pilot valve is discharged to an oil pan through the electromagnetic valve, the system enters a secondary variable displacement stage, a control cavity and a spring cavity of the pilot valve are still communicated with an outlet of the pump or a main oil duct in the secondary variable displacement stage, and the oil pressure in the transfer chamber is zero; before the engine oil pressure at the outlet of the pump or the main oil gallery does not reach a set high-pressure variable pressure point, the feedback pressure oil cavity is communicated with the oil sump through a feedback oil gallery interface and a transfer chamber of the pilot valve in sequence; when the engine oil pressure of the pump outlet or the main oil duct reaches a set high-pressure variable pressure point, the valve core of the pilot valve moves towards the spring cavity under the action of the engine oil pressure in the control cavity, so that the space of the control cavity is increased and is further communicated with the feedback oil duct interface, the feedback pressure oil cavity is communicated with the pump outlet or the main oil duct through the feedback oil duct interface and the control cavity of the pilot valve in sequence, the engine oil pressure of the pump outlet or the main oil duct enters the feedback pressure oil cavity and directly acts on the variable slide block, the eccentric amount of the variable slide block and the rotor is reduced, and the.
The utility model has the advantages that: 1) in the first-stage variable displacement stage, a valve core of the pilot valve does not need to work, and pressure oil of the main oil duct directly flows into the feedback pressure oil cavity through the electromagnetic valve and the transfer chamber, so that the oil pressure of the main oil duct directly acts on the feedback pressure oil cavity; in the second-stage variable displacement stage, the electromagnetic valve is closed, and the pressure oil at the outlet of the pump or the main oil gallery can only flow into the feedback pressure oil cavity through the control cavity of the pilot valve; the control strategies in the two stages are different, but the oil way design is very simple and direct, so that the whole control system is sensitive in response, and the variable sliding block of the oil pump is quick in response. 2) The valve core of the pilot valve does not move in the first-stage variable displacement stage and moves in the second-stage variable displacement stage, so that the abrasion of the pilot valve caused by the movement is reduced, and the service life of the valve is prolonged. 3) The two ends of the valve core of the pilot valve are disc parts with the same diameter, and the structure ensures that the valve hole does not need to be provided with steps any more, thereby being convenient for processing and ensuring the coaxiality.
Drawings
Fig. 1 is a schematic structural diagram of a control system in an embodiment 1 of the present invention at a primary variable displacement stage;
fig. 2 is a schematic structural diagram of the control system of embodiment 1 of the present invention in a two-stage variable displacement stage;
fig. 3 is a schematic structural diagram of the control system of embodiment 2 of the present invention in a primary variable displacement stage;
fig. 4 is a schematic structural diagram of the control system of embodiment 2 of the present invention in the two-stage variable displacement stage;
reference numerals:
1-Single-Chamber feedback variable Displacement vane Pump 11-feedback pressure oil Chamber
2-pump outlet 3-safety valve 4-filter
5-main oil gallery 6-oil pan 7-electromagnetic valve
8-pilot valve 81-spring cavity 82-control cavity
83-transfer chamber 84-feedback oil passage interface 85-valve core
9-damping orifice.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or interconnected between two elements, directly or indirectly through intervening media, and the specific meaning of the terms may be understood by those skilled in the art according to their specific situation.
Example 1
As shown in fig. 1 and 2, a two-stage variable control system for avoiding temperature rise interference includes a single-cavity feedback variable displacement vane pump 1, a pump outlet 2, a safety valve 3, a filter 4, a main oil gallery 5, an oil pan 6, an electromagnetic valve 7, and a pilot valve 8, where the single-cavity feedback variable displacement vane pump 1 includes a pump body, a feedback pressure oil cavity 11, a rotor, a variable slider, and a variable spring, and the pilot valve 8 includes a valve sleeve, a valve core 85, and a spring; the valve core 85 is integrally in an I shape and comprises a rod-shaped part, a first disc and a second disc, wherein the first disc and the second disc are respectively arranged at two ends of the rod-shaped part, the diameters of the first disc and the second disc are the same, a spring cavity 81 is formed between the end surface of the first disc and the valve sleeve, a control cavity 82 is formed between the end surface of the second disc and the valve sleeve, and a transfer chamber 83 is formed between the rod-shaped part and the inner wall of the valve sleeve; the control cavity 82 is always connected with the main oil gallery (5) through an oil way, the spring cavity 81 is always connected with the main oil gallery 5 through a damping hole 9, and the transfer chamber 83 is connected with the main oil gallery 5 through an electromagnetic valve 7; a feedback oil passage interface 84 for connecting the feedback pressure oil chamber 11 is arranged on the side wall of the valve sleeve, the movement of the valve core 85 in the valve sleeve is controlled through spring force and engine oil pressure, and the feedback oil passage interface 84 is alternatively in two states of being communicated with the transfer chamber 83 or the control chamber 82 along with the different positions of the valve core 85 in the valve sleeve, so that the transfer chamber 83 or the control chamber 82 is connected with the feedback pressure oil chamber 11; a port P of the electromagnetic valve 7 is communicated with the main oil gallery 5, a port A is communicated with a transfer chamber 83 of the pilot valve 8, a port T is communicated with the oil pan 6, and the port A can be communicated with the port P or the port T under the control of the ECU.
In the above technical solution, since the spring chamber 81 of the pilot valve is always connected to the main oil gallery 5 through the damping hole 9, it means that both the spring force in the spring chamber acts on the first disk of the valve core 85 and the oil pressure from the damping hole 9 acts on the first disk of the valve core 85, thereby forming a mixed supporting force for the valve core 85. Because the pressure oil of the control chamber 82 and the spring chamber 81 of the pilot valve comes from the main oil gallery 5, the oil pressure of the control chamber and the spring chamber 81 of the pilot valve 82 is equal in the unchanged displacement stage, when the oil pressure continuously rises, the oil pressure entering the control chamber 82 is inevitably greater than the oil pressure of the spring chamber 81 due to the damping hole 9, the pressure oil in the control chamber 82 can push the valve core 85 to move towards the spring chamber 81, the temperature of the pressure oil correspondingly rises along with the rise of the pressure, and when the temperature rises, the oil pressure in the control chamber 82 is reduced, the oil pressure in the spring chamber 81 is also reduced, so that the opening time of the pilot valve 8 is not influenced.
The working process of the embodiment includes the following two stages: as shown in fig. 1, in the stage of one-stage variable displacement, under the control of the ECU, the port P of the solenoid valve is communicated with the port a, and the pressure oil in the main oil gallery enters the relay chamber 83 of the pilot valve through the solenoid valve 7, at this stage, the oil pressure entering the control chamber 82 from the main oil gallery 5 is not enough to push the valve core 85 to move towards the spring chamber 81, and at this time, the feedback oil gallery port 84 is communicated with the relay chamber 83, so that the oil in the relay chamber 83 is introduced into the feedback pressure oil chamber 11; when the engine oil pressure of the main oil duct 5 reaches the set low-pressure variable pressure point, the engine oil pressure of the main oil duct 5 enters the feedback pressure oil chamber 11 through the transfer chamber 83 and directly acts on the variable slider, so that the eccentricity between the variable slider and the rotor is reduced, and the output displacement is reduced.
As shown in fig. 2, when the solenoid valve 7 is switched to another working state under the control of the ECU, the port P of the solenoid valve is not communicated with the port a, the port a of the solenoid valve 7 is communicated with the port T, the pressure oil in the relay chamber 83 of the pilot valve is discharged to the oil pan 6 through the solenoid valve 7, the system enters a second-stage variable displacement stage, in which the control chamber 82 and the spring chamber 81 of the pilot valve are still communicated with the main oil gallery, and the oil pressure in the relay chamber 83 is zero; before the engine oil pressure of the main oil gallery 5 does not reach the set high-pressure variable pressure point, the feedback pressure oil cavity 11 is communicated with the oil pan 6 through a feedback oil gallery interface 84 and a transfer chamber 83 of the pilot valve in sequence; when the engine oil pressure of the main oil duct 5 reaches a set high-pressure variable pressure point, the valve core 85 of the pilot valve moves towards the spring cavity 81 under the action of the engine oil pressure in the control cavity 82, so that the space of the control cavity 82 is increased and is further communicated with the feedback oil duct interface 84, the feedback pressure oil cavity 11 is communicated with the main oil duct 5 sequentially through the feedback oil duct interface 84 and the control cavity 82 of the pilot valve, the engine oil pressure of the main oil duct 5 enters the feedback pressure oil cavity 11 and directly acts on the variable slide block, the eccentricity between the variable slide block and the rotor is reduced, and the output displacement is reduced.
Example 2
As shown in fig. 3 and 4, the whole control system provided by this embodiment belongs to the same concept as that of embodiment 1, and the working process and the working principle of the two are basically the same. The difference points are that: the control chamber 82 in this embodiment is always connected to the pump outlet 2 through an oil passage, the spring chamber 81 is always connected to the pump outlet 2 through the orifice 9, and the connection relationship between the other components is completely the same as that in embodiment 1.
The above-mentioned embodiment is the utility model discloses the implementation scheme of preferred, in addition, the utility model discloses can also realize by other modes, any obvious replacement is all within the protection scope of the utility model under the prerequisite that does not deviate from this technical scheme design.
In order to make it easier for those skilled in the art to understand the improvement of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and in order to clarify, some other elements have been omitted from this document, those skilled in the art should recognize that these omitted elements may also constitute the content of the present invention.
Claims (2)
1. The utility model provides an avoid two-stage variable control system of temperature rise interference, includes single chamber feedback variable displacement vane pump (1), pump export (2), relief valve (3), main oil gallery (5), oil pan (6), solenoid valve (7), pilot valve (8), single chamber feedback variable displacement vane pump (1) is including the pump body, feedback pressure oil pocket (11), rotor, variable slider and variable spring, its characterized in that: the pilot valve (8) comprises a valve sleeve, a valve core (85) and a spring; the valve core (85) is integrally I-shaped and comprises a rod-shaped part, a first disc and a second disc, wherein the first disc and the second disc are respectively arranged at two ends of the rod-shaped part, the diameters of the first disc and the second disc are the same, a spring cavity (81) is formed between the end surface of the first disc and the valve sleeve, a control cavity (82) is formed between the end surface of the second disc and the valve sleeve, and a transfer chamber (83) is formed between the rod-shaped part and the inner wall of the valve sleeve; the control cavity (82) is always connected with the pump outlet (2) or the main oil gallery (5) through an oil way, the spring cavity (81) is always connected with the pump outlet (2) or the main oil gallery (5) through a damping hole (9), and the transfer chamber (83) is connected with the main oil gallery (5) through an electromagnetic valve (7); a feedback oil channel interface (84) used for being connected with a feedback pressure oil cavity (11) is arranged on the side wall of the valve sleeve, the movement of the valve core (85) in the valve sleeve is controlled through spring force and engine oil pressure, and along with the difference of the position of the valve core (85) in the valve sleeve, the feedback oil channel interface (84) is alternatively in two states of being communicated with the transfer chamber (83) or the control cavity (82), so that the on-off of the transfer chamber (83) or the control cavity (82) and the feedback pressure oil cavity (11) is realized; a port P of the electromagnetic valve (7) is communicated with the main oil gallery (5), a port A is communicated with a transfer chamber (83) of the pilot valve, a port T is communicated with the oil pan (6), and the port A can be communicated with the port P or the port T under the control of the ECU.
2. A two-stage variable control system for avoiding temperature-rise interference as recited in claim 1 wherein: in the first-stage variable displacement stage, under the control of an ECU, a port P of an electromagnetic valve is communicated with a port A, pressure oil in a main oil duct enters a transfer chamber (83) of a pilot valve through the electromagnetic valve (7), in the stage, because pressure oil is filled in a spring chamber (81) and the transfer chamber (83), the oil pressure entering a control chamber (82) from a pump outlet (2) or a main oil duct (5) is insufficient to push a valve core (85) to move towards the spring chamber (81), and at the moment, a feedback oil duct interface (84) is communicated with the transfer chamber (83), and the engine oil in the transfer chamber (83) is introduced into a feedback pressure oil chamber (11); when the engine oil pressure of the main oil duct (5) reaches a set low-pressure variable pressure point, the engine oil pressure of the main oil duct (5) enters the feedback pressure oil cavity (11) through the transfer chamber (83) and directly acts on the variable slide block, so that the eccentric quantity of the variable slide block and the rotor is reduced, and the output displacement is reduced;
when the electromagnetic valve (7) is switched to another working state under the control of the ECU, a port P of the electromagnetic valve (7) is not communicated with a port A, the port A of the electromagnetic valve is communicated with a port T, pressure oil in a transfer chamber (83) of the pilot valve is discharged to an oil pan (6) through the electromagnetic valve (7), the system enters a second-stage variable displacement stage, in the second-stage variable displacement stage, a control cavity (82) and a spring cavity (81) of the pilot valve are still communicated with a pump outlet (2) or a main oil duct (5), and the oil pressure in the transfer chamber (83) is zero; before the engine oil pressure of the pump outlet (2) or the main oil gallery (5) does not reach a set high-pressure variable pressure point, the feedback pressure oil chamber (11) is communicated with the oil pan (6) through a feedback oil gallery interface (84) and a transfer chamber (83) of the pilot valve in sequence; when the engine oil pressure of the pump outlet (2) or the main oil gallery (5) reaches a set high-pressure variable pressure point, the valve core (85) of the pilot valve moves towards the spring cavity (81) under the action of the engine oil pressure in the control cavity (82) to increase the space of the control cavity (82) and further communicate with the feedback oil gallery interface (84), the feedback pressure oil cavity (11) sequentially communicates with the pump outlet (2) or the main oil gallery (5) through the feedback oil gallery interface (84) of the pilot valve and the control cavity (82), the engine oil pressure of the pump outlet (2) or the main oil gallery (5) enters the feedback pressure oil cavity (11) to directly act on the variable slide block, the eccentric quantity of the variable slide block and the rotor is reduced, and the output displacement is reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021190506.0U CN212272345U (en) | 2020-06-24 | 2020-06-24 | Two-stage variable control system capable of avoiding temperature rise interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021190506.0U CN212272345U (en) | 2020-06-24 | 2020-06-24 | Two-stage variable control system capable of avoiding temperature rise interference |
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| CN212272345U true CN212272345U (en) | 2021-01-01 |
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| CN202021190506.0U Withdrawn - After Issue CN212272345U (en) | 2020-06-24 | 2020-06-24 | Two-stage variable control system capable of avoiding temperature rise interference |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550297A (en) * | 2020-06-24 | 2020-08-18 | 湖南机油泵股份有限公司 | Two-stage variable control system capable of avoiding temperature rise interference |
-
2020
- 2020-06-24 CN CN202021190506.0U patent/CN212272345U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550297A (en) * | 2020-06-24 | 2020-08-18 | 湖南机油泵股份有限公司 | Two-stage variable control system capable of avoiding temperature rise interference |
| CN111550297B (en) * | 2020-06-24 | 2024-05-03 | 湖南机油泵股份有限公司 | Two-stage variable control system capable of avoiding temperature rise interference |
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Granted publication date: 20210101 Effective date of abandoning: 20240503 |