CN113217797B - Two-stage variable control system based on variable pump - Google Patents
Two-stage variable control system based on variable pump Download PDFInfo
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- CN113217797B CN113217797B CN202110510207.3A CN202110510207A CN113217797B CN 113217797 B CN113217797 B CN 113217797B CN 202110510207 A CN202110510207 A CN 202110510207A CN 113217797 B CN113217797 B CN 113217797B
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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
- F16N—LUBRICATING
- F16N13/00—Lubricating-pumps
- F16N13/20—Rotary pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/02—Pressure lubrication using lubricating pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/02—Pressure lubrication using lubricating pumps
- F01M2001/0207—Pressure lubrication using lubricating pumps characterised by the type of pump
- F01M2001/0238—Rotary pumps
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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
- F16N—LUBRICATING
- F16N2270/00—Controlling
- F16N2270/20—Amount of lubricant
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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
- F16N—LUBRICATING
- F16N2280/00—Valves
- F16N2280/02—Valves electromagnetically operated
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The invention provides a two-stage variable control system based on a variable pump, which comprises the variable pump, a main oil duct, a pilot valve and an electromagnetic valve, wherein a feedback cavity is arranged on the variable pump; the control cavity is communicated with the pump outlet or the main oil gallery all the time, and the transfer chamber is communicated with the control cavity through the axial oil hole and the radial oil hole; the side wall of the valve sleeve is provided with a first interface used for being connected with an electromagnetic valve and a second interface used for being connected with the feedback cavity, the electromagnetic valve is a two-position two-way valve and comprises a port P and a port A, the port P is communicated with the first interface through an oil way, and the port A is communicated with the feedback cavity through an oil way. The structure and the layout of the control system are simplified, and the control strategy is quick and effective.
Description
Technical Field
The invention relates to the technical field of internal combustion engine lubrication systems, in particular to a control system of a variable 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, wherein the structure of the mechanical valve and the oil circuit design of the whole system are generally complex.
Disclosure of Invention
The invention aims to provide a two-stage variable control system based on a variable pump, and the control strategy and the oil circuit design of the control system are simpler.
In order to solve the technical problem, the technical scheme of the invention is as follows: a two-stage variable control system based on a variable pump comprises the variable pump, a pump outlet, a main oil duct, an electromagnetic valve and a pilot valve, wherein the variable pump comprises a pump body and a feedback cavity; a spring cavity is formed between the cylindrical part of the valve core and the valve sleeve, a transfer chamber is formed between the rod-shaped part and the inner wall of the valve sleeve, and a control cavity is formed between the disc part and the valve sleeve; the control cavity is communicated with the pump outlet or the main oil duct all the time through an oil way, and the transfer chamber is communicated with the control cavity all the time through an axial oil hole and a radial oil hole; the side wall of the valve sleeve is provided with a first interface used for being connected with an electromagnetic valve and a second interface used for being connected with a feedback cavity, the electromagnetic valve is a two-position two-way valve and comprises a port P and a port A, the port P is communicated with the first interface through an oil way, the port A is communicated with the feedback cavity through an oil way, and the port P and the port A can be in a communicated or disconnected state under the control of an ECU (electronic control Unit); along with the different positions of the valve core in the valve sleeve, the first interface and the second interface are respectively in two states of being shielded by the cylindrical part of the valve core or being communicated with the transfer chamber, so that the on-off of the transfer chamber and the feedback chamber is realized.
The working process of the invention is as follows: in an initial state, the oil pressure entering the control cavity from the pump outlet or the main oil gallery is not enough to push the valve core to move towards the spring cavity, the first interface and the second interface are both blocked by the cylindrical part of the valve core, and the pressure oil in the transfer chamber cannot flow into the feedback cavity;
when the oil pressure entering the control cavity from the pump outlet or the main oil gallery is continuously increased and pushes the valve core to move towards the spring cavity, the first interface is communicated with the transfer chamber, the second interface is continuously shielded by the cylindrical part of the valve core, the system enters a low-pressure variable mode at the moment, the port P and the port A of the electromagnetic valve are communicated under the control of the ECU, and the pressure oil in the transfer chamber flows into the feedback cavity through the first interface and the electromagnetic valve;
when the port P and the port A of the electromagnetic valve are disconnected under the control of the ECU, the system enters a high-pressure variable mode, and at the moment, pressure oil in the transfer chamber cannot flow into the feedback cavity through the first interface and the electromagnetic valve; when the oil pressure in the control cavity is continuously increased and pushes the valve core to further move towards the spring cavity, the second interface is communicated with the transfer chamber, and the pressure oil in the transfer chamber directly flows into the feedback cavity through the second interface.
Preferably, the cylindrical portion and the disc portion of the valve body have the same diameter. Therefore, the valve hole does not need to be provided with a step, and the coaxiality is ensured by convenient processing.
Furthermore, a throttle hole is formed in the position, corresponding to the feedback cavity, of the pump body. This orifice can be revealed the fluid in oil pump high pressure chamber to the feedback chamber and outwards discharged, avoids causing the interference to the feedback chamber.
The beneficial effects obtained by the invention are as follows:
1) In a low-pressure variable mode, the oil pressure entering the control cavity from the pump outlet or the main oil gallery is continuously increased and pushes the valve core to move towards the spring cavity, so that the first interface is communicated with the transfer chamber, and the pressure oil in the transfer chamber flows into the feedback cavity through the first interface and the electromagnetic valve; in the high-pressure variable mode, the valve core further moves towards the spring cavity under the action of oil pressure, so that the second interface is communicated with the transfer chamber, the electromagnetic valve is closed at the moment, and the pressure oil in the transfer chamber can only flow into the feedback cavity through the second interface; the control strategies of the two modes are different, but the oil way design is very simple and direct, so that the whole control system is more sensitive in response.
2) The adopted electromagnetic valve is a two-position two-way valve, only has an oil inlet P and an oil outlet A, and has no oil drainage port T, the structure is simpler, and the cost is low. The oil drainage port is free from pollution caused by oil drainage of the oil drainage port, and a special oil way is not required to be arranged to guide the discharged oil to a specified position.
Drawings
FIG. 1 is a schematic diagram of a pilot valve according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an oil path structure of the control system in an initial state according to the embodiment of the present invention;
FIG. 3 is a schematic diagram of an oil path structure of the control system in the low-pressure variable mode according to the embodiment of the invention;
FIG. 4 is a schematic diagram of an oil circuit structure of the control system in the high-pressure variable mode according to the embodiment of the invention;
reference numerals are as follows:
1-variable pump 11-feedback chamber 12-orifice
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-first interface 85-valve core
86-second interface.
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 those shown in the drawings, merely for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to 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 defined 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.
As shown in fig. 1 to 4, a two-stage variable control system based on a variable displacement pump comprises a variable displacement 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, wherein the variable displacement pump 1 comprises a pump body and a feedback cavity 11, and a throttle hole 12 is formed in the position, corresponding to the feedback cavity 11, of the pump body; the pilot valve 8 comprises a valve sleeve, a valve core 85 and a spring, the whole valve core 85 is in a high-foot cup shape and comprises a cylindrical part, a rod-shaped part and a disc part, the diameters of the cylindrical part and the disc part of the valve core 85 are the same, an axial oil hole 85a is formed from the middle of the end face of the disc part to the rod-shaped part, and at least one radial oil hole 85b communicated with the axial oil hole is formed in the peripheral surface of the rod-shaped part; a spring cavity 81 is formed between the cylindrical part of the valve core and the valve sleeve, a transfer chamber 83 is formed between the rod part and the inner wall of the valve sleeve, and a control cavity 82 is formed between the disc part and the valve sleeve; the control cavity 82 is always communicated with the pump outlet 2 or the main oil gallery 5 through an oil way, and the transfer chamber 83 is always communicated with the control cavity 82 through a radial oil hole 85b and an axial oil hole 85 a; a first interface 84 used for connecting an electromagnetic valve and a second interface used for connecting a feedback cavity 86 are arranged on the side wall of the valve sleeve, the electromagnetic valve 7 is a two-position two-way valve and comprises a port P and a port A, the port P is communicated with the first interface 84 through an oil way, the port A is communicated with the feedback cavity 11 through an oil way, and the port P and the port A can be in a communicated or disconnected state under the control of an ECU (electronic control Unit); with the different positions of the valve core 85 in the valve sleeve, the first port 84 and the second port 86 are respectively in two states of being blocked by the cylindrical portion of the valve core 85 or being communicated with the relay chamber 83, so that the relay chamber 83 and the feedback chamber 11 are switched on and off.
The working process of the embodiment is divided into the following three stages:
1. as shown in fig. 2, in the initial state, the oil pressure entering the control chamber 82 from the main gallery 5 is not sufficient to push the valve body 85 to move toward the spring chamber 81, and the first port 84 and the second port 86 are blocked by the cylindrical portion of the valve body 85, so that the pressure oil in the relay chamber 83 cannot flow into the feedback chamber 11.
2. As shown in fig. 3, when the oil pressure entering the control chamber 82 from the main oil gallery 5 continuously increases and pushes the valve core 85 to move toward the spring chamber 81, so that the first port 84 is communicated with the relay chamber 83, the second port 86 is continuously blocked by the cylindrical portion of the valve core 85, at this time, the system enters the low-pressure variable mode, the port P and the port a of the electromagnetic valve 7 are communicated under the control of the ECU, and the pressure oil in the relay chamber 83 flows into the feedback chamber 11 through the first port 84 and the electromagnetic valve 7.
3. As shown in fig. 4, when the port P and the port a of the electromagnetic valve 7 are disconnected under the control of the ECU, the system enters a high-pressure variable mode, and at this time, the pressure oil in the relay chamber 83 cannot flow into the feedback chamber 11 through the first port 84 and the electromagnetic valve 7; when the oil pressure in the control chamber 82 continues to increase and pushes the valve spool 85 to move further toward the spring chamber 81, the second port 86 is communicated with the relay chamber 83, and the pressure oil in the relay chamber 83 directly flows into the feedback chamber 11 through the second port 86.
The beneficial effect of this embodiment is:
1) In the low-pressure variable mode, the oil pressure entering the control chamber 82 from the main oil gallery 5 is continuously increased and pushes the valve core 85 to move towards the spring chamber 81, so that the first port 84 is communicated with the transfer chamber 83, and the pressure oil in the transfer chamber 83 flows into the feedback chamber 11 through the first port 84 and the electromagnetic valve 7; in the high-pressure variable mode, the valve core 85 further moves towards the spring cavity 81 under the action of the oil pressure, so that the second port 86 is communicated with the transfer chamber 83, the electromagnetic valve 7 is closed at the moment, and the pressure oil in the transfer chamber 83 can only flow into the feedback cavity 11 through the second port 86; the control strategies of the two modes are different, but the oil circuit design is very simple and direct, so that the reaction of the whole control system is more sensitive.
2) The adopted electromagnetic valve 7 is a two-position two-way valve, only has an oil inlet P and an oil outlet A, has no oil drainage port T, and has simpler structure and low cost. The oil drainage port is free from pollution caused by oil drainage of the oil drainage port, and a special oil way is not required to be arranged to guide the discharged oil to a specified position.
The above embodiments are preferred implementations of the present invention, and the present invention can be implemented in other ways without departing from the spirit of the present invention.
Some of the figures and descriptions of the present invention have been simplified to provide a convenient understanding of the modifications of the invention relative to the prior art, and to omit elements for clarity, as those skilled in the art will recognize may also constitute the subject matter of the present invention.
Claims (4)
1. The utility model provides a two-stage variable control system based on variable pump, includes variable pump (1), pump export (2), main oil gallery (5), solenoid valve (7), pilot valve (8), variable pump (1) is including the pump body and one feedback chamber (11), its characterized in that: the pilot valve (8) comprises a valve sleeve, a valve core (85) and a spring, the valve core (85) is in a goblet shape as a whole and comprises a cylindrical part, a rod-shaped part and a disk part, an axial oil hole (85 a) is formed from the middle of the end surface of the disk part to the rod-shaped part, and at least one radial oil hole (85 b) communicated with the axial oil hole is formed in the peripheral surface of the rod-shaped part; a spring cavity (81) is formed between the cylindrical part of the valve core (85) and the valve sleeve, a transfer chamber (83) is formed between the rod-shaped part and the inner wall of the valve sleeve, and a control cavity is formed between the disc part and the valve sleeve; the control cavity (82) is communicated with the pump outlet (2) or the main oil gallery (5) all the time through an oil way, and the transfer chamber (83) is communicated with the control cavity (82) all the time through a radial oil hole (85 b) and an axial oil hole (85 a); a first interface (84) used for being connected with an electromagnetic valve and a second interface (86) used for being connected with a feedback cavity (11) are arranged on the side wall of the valve sleeve, the electromagnetic valve (7) is a two-position two-way valve and comprises a port P and a port A, the port P is communicated with the first interface (84) through an oil way, the port A is communicated with the feedback cavity (11) through an oil way, and the port P and the port A can be in a communicated or disconnected state under the control of an ECU; with the different positions of the valve core (85) in the valve sleeve, the first interface (84) and the second interface (86) are respectively in two states of being shielded by the cylindrical part of the valve core (85) or being communicated with the transfer chamber (83), so that the transfer chamber (83) and the feedback chamber (11) are switched on and off.
2. The variable pump-based two-stage variable control system of claim 1, wherein: in an initial state, the oil pressure entering the control cavity (82) from the pump outlet (2) or the main oil gallery (5) is not enough to push the valve core (85) to move towards the spring cavity (81), the first interface (84) and the second interface (86) are both blocked by the cylindrical part of the valve core (85), and the pressure oil in the transfer chamber cannot flow into the feedback cavity (11);
when the oil pressure entering the control cavity (82) from the pump outlet (2) or the main oil gallery (5) is continuously increased and pushes the valve core (85) to move towards the spring cavity (81), the first interface (84) is communicated with the transfer chamber (83), the second interface (86) is continuously shielded by the cylindrical part of the valve core (85), the system enters a low-pressure variable mode at the moment, the port P and the port A of the electromagnetic valve (7) are communicated under the control of the ECU, and the pressure oil in the transfer chamber (83) flows into the feedback cavity (11) through the first interface (84) and the electromagnetic valve (7);
when a port P and a port A of the electromagnetic valve (7) are disconnected under the control of the ECU, the system enters a high-pressure variable mode, and pressure oil in the transfer chamber (83) cannot flow into the feedback cavity (11) through the first interface (84) and the electromagnetic valve (7); when the oil pressure entering the control chamber (82) is continuously increased and pushes the valve core (85) to further move towards the spring chamber (81), the second interface (86) is communicated with the transfer chamber (83), and the pressure oil in the transfer chamber (83) directly flows into the feedback chamber (11) through the second interface (86).
3. A two-stage variable control system based on a variable displacement pump according to claim 1 or 2, characterized in that: the cylindrical portion and the disk portion of the valve element (85) have the same diameter.
4. A two-stage variable control system based on a variable displacement pump according to claim 1 or 2, characterized in that: and a throttle hole (12) is formed in the position, corresponding to the feedback cavity (11), of the pump body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110510207.3A CN113217797B (en) | 2021-05-24 | 2021-05-24 | Two-stage variable control system based on variable pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110510207.3A CN113217797B (en) | 2021-05-24 | 2021-05-24 | Two-stage variable control system based on variable pump |
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| Publication Number | Publication Date |
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| CN113217797A CN113217797A (en) | 2021-08-06 |
| CN113217797B true CN113217797B (en) | 2022-10-11 |
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| CN202110510207.3A Active CN113217797B (en) | 2021-05-24 | 2021-05-24 | Two-stage variable control system based on variable pump |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2066904B1 (en) * | 2006-09-26 | 2017-03-22 | Magna Powertrain Inc. | Control system and method for pump output pressure control |
| CN104895642B (en) * | 2015-06-15 | 2017-05-03 | 湖南机油泵股份有限公司 | Control system for pilot solenoid valve single-chamber feedback variable-displacement vane pump |
| CN107605720B (en) * | 2017-10-27 | 2019-06-28 | 湖南机油泵股份有限公司 | A kind of three-level or level Four displacement-variable oil pump based on biswitch solenoid valve |
| CN108798823B (en) * | 2018-08-21 | 2023-08-18 | 湖南机油泵股份有限公司 | Three-stage variable displacement control system based on double-cavity feedback |
| CN110469503B (en) * | 2019-09-18 | 2024-04-02 | 湖南机油泵股份有限公司 | Two-stage variable control system based on variable displacement pump |
| CN111794959A (en) * | 2020-08-04 | 2020-10-20 | 湖南机油泵股份有限公司 | Pressure relief type variable displacement oil pump |
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