CN218327465U - Electric control variable flow oil pump - Google Patents
Electric control variable flow oil pump Download PDFInfo
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- CN218327465U CN218327465U CN202222609363.8U CN202222609363U CN218327465U CN 218327465 U CN218327465 U CN 218327465U CN 202222609363 U CN202222609363 U CN 202222609363U CN 218327465 U CN218327465 U CN 218327465U
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- valve hole
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- 238000006073 displacement reaction Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 64
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000006872 improvement Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000010721 machine oil Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- 238000011946 reduction process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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Abstract
The utility model provides an electric control variable flow oil pump, which comprises a pump shell, wherein a low-pressure area, a high-pressure area and a valve hole are arranged on the pump shell, and a plunger, a spring and a plug are arranged in the valve hole; a low-pressure area interface and a high-pressure area interface are arranged on the side wall of the valve hole; the two ends of the plunger piston are thick and the middle is thin, a transfer chamber is formed between the middle part of the plunger piston and the side wall of the valve hole, one end of the plunger piston is contacted with the spring, and a feedback cavity is formed between the end part of the other end of the plunger piston and the bottom wall of the plug or the valve hole; the feedback cavity is connected with the main oil gallery or the outlet of the pump through an oil passage, and a proportional electromagnetic valve is arranged on the oil passage; the proportional solenoid valve can control whether and how much oil that gets into in the feedback chamber, and the size of feedback intracavity oil pressure can influence the position of plunger in the valve opening. The oil pump can be improved on the basis of the original constant delivery pump, so that the oil pump has the energy-saving effect of variable displacement and also keeps the reliability of the constant delivery pump.
Description
Technical Field
The utility model relates to an engine lubrication system technical field, concretely relates to full variable displacement oil pump.
Background
In order to respond to emission upgrading and meet the requirement of users on higher fuel economy, various large engine plants carry out national six-emission upgrading development on engines so as to adapt to emission regulations and market requirements.
The oil pump is an important part of an engine, and the energy-saving optimization of the oil pump is an indispensable part of the engine. The variable displacement is taken as the latest energy-saving design technology of the oil pump, and is naturally concerned by major host factories.
At present, the proportion of the variable displacement pump adopted by the passenger vehicle reaches 50%, the variable displacement pump adopted by the commercial vehicle is gradually matured, and the variable displacement pump is substituted for the fixed displacement pump to indicate daily wait. However, the variable displacement pump has several disadvantages, which makes it difficult to be popularized.
1) The structure is complex, the variable structure is added, and the failure mode of the oil pump is increased while the cost is increased;
2) The quantitative pump mainly comprises a gear pump and a rotor pump, and the variable pump technology of the two structures is still immature;
3) The variable displacement pump is mainly a vane pump or a deformed vane type structure, and the reliability of the variable displacement pump is inferior to that of a gear pump and a rotor pump, particularly a commercial vehicle oil pump;
4) The difference of structure has led to arranging of variable pump and constant delivery pump great difference, and if both install the border altogether, or constant delivery pump upgrading variable delivery pump, design cost is higher, development cycle length.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that to the above-mentioned shortcoming that the variable displacement pump exists, provide an automatically controlled variable flow machine oil pump, this machine oil pump can use original constant delivery pump as the basis, improves it under the condition that does not change the basic structure and the installation boundary of constant delivery pump, makes it both have the energy-conserving effect of variable displacement volume, has remain the reliability of constant delivery pump again.
In order to solve the technical problem, the technical scheme of the utility model is that: an electric control variable flow oil pump comprises a pump shell, wherein a rotor cavity for mounting a rotor assembly is arranged on the pump shell, the rotor cavity can be divided into a low-pressure area and a high-pressure area according to the positions of an oil inlet and an oil outlet, a valve hole is formed in the pump shell, and a plunger, a spring and a plug are arranged in the valve hole; the side wall of the valve hole is provided with a low-pressure area interface for connecting a low-pressure area of an oil pump and a high-pressure area interface for connecting a high-pressure area of the oil pump; the two ends of the plunger are thick and the middle of the plunger is thin, a transfer chamber is formed between the middle part of the plunger and the side wall of the valve hole, one end of the plunger is contacted with the spring, and a feedback cavity is formed between the end part of the other end of the plunger and the bottom wall of the plug or the valve hole; the feedback cavity is connected with the main oil duct or the pump outlet through an oil path, and a proportional solenoid valve is arranged on the oil path; the proportional solenoid valve can control whether and how much oil that gets into in the feedback chamber, the size of feedback intracavity oil pressure can influence the position of plunger in the valve opening.
In one embodiment, the plunger is in the shape of an I in its entirety.
In one embodiment, the plunger is in a goblet shape as a whole and comprises a cylindrical part, a rod-shaped part and a disc part, wherein a raised part is arranged on the end face of the disc part, the cylindrical part is used for accommodating a part of the spring, and the raised part is in contact fit with the bottom wall of the blocking or valve hole.
In one embodiment, the proportional solenoid valve is provided with a port P, a port A and a port T, wherein the port P is communicated with the main oil gallery or the pump outlet, the port A is communicated with the feedback cavity, and the port T is communicated with the oil sump.
In one embodiment, the proportional solenoid valve is disposed on a pump housing of the oil pump or a cylinder block of the engine.
In one embodiment, the oil pump is a gear pump, a rotor pump or a vane pump.
The utility model discloses a theory of operation and process are: ECU sends PWM signal for proportional solenoid valve, and the proportion solenoid valve controls the fluid that gets into in the feedback chamber has or not and how much, and the size of feedback intracavity oil pressure and then influence the position of plunger in the valve hole, and its concrete process is as follows:
1) Flow reduction process: under the control of the ECU, the proportional solenoid valve P-A is communicated, A-T is not communicated, pressure oil in the main oil duct or the pump outlet enters the feedback cavity, the oil pressure in the feedback cavity is increased, the plunger is pushed to move rightwards, the high-pressure area interface and the low-pressure area interface are communicated through the transfer chamber, and at the moment, part of the oil in the high-pressure area directly flows back to the low-pressure area through the transfer chamber, so that the output flow of the pump outlet is reduced.
2) And (3) flow increasing process: the electromagnetic valve P-A is not communicated, the electromagnetic valve A-T is communicated, pressure oil in the feedback cavity is drained to the oil bottom shell from the port T, the oil pressure in the feedback cavity is reduced, the plunger returns to the left under the action of the pre-tightening force of the spring, the opening degree of the plunger is reduced or even closed, at the moment, the engine oil in the high-pressure area cannot directly flow back to the low-pressure area through the transfer chamber, or only a small amount of engine oil directly flows back to the low-pressure area through the transfer chamber, so that the output flow of the pump outlet is increased.
The utility model discloses the beneficial effect who gains is: the original structure of the constant delivery pump can be directly improved into the electric control variable flow rate oil pump, the design cost is low, the structure of the oil pump is not limited, the structures such as a gear pump, a rotor pump, a vane pump and the like can be all adopted, the flow rate of the outlet of the pump can be matched with the flow rate required by an engine after the improvement, and the power consumption can be saved to the greatest extent; a special variable flow mechanism is not required to be added, and only a proportional electromagnetic valve is required to be added on an oil pump or a cylinder body, so that the development time and cost are greatly reduced; the characteristics of the original structure can be continued, and the reliability is ensured.
Drawings
Fig. 1 is a schematic diagram of an overall structure of an oil pump in an embodiment of the present invention;
the reference signs are:
1-pump casing 2-plunger
3-spring 4-plug
5-transfer chamber 6-feedback chamber
7-proportional electromagnetic valve 8-oil inlet
9-oil outlet 10-oil return channel.
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 "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, and 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.
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, an electric control variable flow oil pump comprises a pump shell 1, wherein a rotor cavity for mounting a rotor assembly is arranged on the pump shell 1, the rotor cavity can be divided into a low-pressure area and a high-pressure area according to the positions of an oil inlet 8 and an oil outlet 9, a valve hole is arranged on the pump shell 1, and a plunger 2, a spring 3 and a plug 4 are arranged in the valve hole; the valve hole in the embodiment is adjacent to the high-pressure area, so that the valve hole can be communicated with the high-pressure area connected with the oil pump only by arranging a high-pressure area interface on the side wall of the valve hole, and the side wall of the valve hole is also provided with a low-pressure area interface and is connected to the low-pressure area of the oil pump through an oil return channel 10 (a dotted line part); the two ends of the plunger 2 are thick and the middle is thin, a transfer chamber 5 is formed between the middle part of the plunger 2 and the side wall of the valve hole, one end of the plunger 2 is contacted with the spring 3, and a feedback cavity 6 is formed between the end part of the other end of the plunger 2 and the plug 4 or the bottom wall of the valve hole; the feedback cavity 6 is connected with the main oil duct or the pump outlet through an oil path, and a proportional solenoid valve 7 is arranged on the oil path; the proportional solenoid valve 7 is arranged on a pump shell 1 of the oil pump or a cylinder body of an engine, the proportional solenoid valve 7 can control the amount of oil entering the feedback cavity 6, and the oil pressure in the feedback cavity 6 can influence the position of the plunger 2 in a valve hole; the proportional solenoid valve 7 is provided with a port P, a port A and a port T, wherein the port P is communicated with the main oil gallery or the pump outlet, the port A is communicated with the feedback cavity 6, and the port T is communicated with the oil pan.
In this embodiment, the plunger 2 is a high-leg cup shape as a whole, and includes a cylindrical portion, a rod-shaped portion, and a disk portion, and a protrusion portion is provided on an end surface of the disk portion, the cylindrical portion is used for accommodating a part of the spring 3, and the protrusion portion is in contact fit with the bottom wall of the plug 4 or the valve hole. Alternatively, the plunger 2 may be designed to have an i-shape as a whole.
The oil pump in this embodiment is a gear pump, and may be configured as a rotor pump or a vane pump as needed.
The working principle and the process of the embodiment are as follows: ECU sends PWM signal for proportional solenoid valve 7, and the proportion solenoid valve 7 is controlled the fluid that gets into in the feedback chamber 6 and has or not and how much, and the size of the interior oil pressure of feedback chamber 6 and then influence the position of plunger 2 in the valve opening, and its specific process is as follows:
1) Flow reduction process: under the control of the ECU, the P-A of the proportional solenoid valve 7 is communicated, the A-T is not communicated, pressure oil of a main oil duct or a pump outlet enters the feedback cavity 6, the oil pressure in the feedback cavity 6 is increased, the plunger 2 is pushed to move rightwards, the high-pressure area interface is communicated with the low-pressure area interface through the transfer chamber 5, and part of the oil in the high-pressure area directly flows back to the low-pressure area through the transfer chamber 5 at the moment, so that the output flow of the pump outlet is reduced.
2) And (3) flow increasing process: the P-A of the electromagnetic valve 7 is not communicated, the A-T is communicated, the pressure oil in the feedback cavity 6 is discharged to an oil pan from a T port, the oil pressure in the feedback cavity 6 is reduced, the plunger 2 returns to the left under the action of the pre-tightening force of the spring 3, the opening degree of the plunger 2 is reduced or even closed, at the moment, the oil in a high-pressure area cannot directly flow back to a low-pressure area through the transfer chamber 5, or only a small amount of oil directly flows back to the low-pressure area through the transfer chamber 5, so that the output flow of the pump outlet is increased.
The technical scheme of the embodiment can directly improve the original constant delivery pump structure into the electric control variable flow oil pump, has low design cost and no limit to the oil pump structure, can adopt the structures of a gear pump, a rotor pump, a vane pump and the like, can enable the flow of the outlet of the pump to be matched with the flow required by an engine after improvement, and can save power consumption to the maximum extent; a special variable flow mechanism is not required to be added, and only a proportional electromagnetic valve is required to be added on an oil pump or a cylinder body, so that the development time and cost are greatly reduced; the characteristics of the original structure can be continued, and the reliability is ensured.
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 (6)
1. The electric control variable flow oil pump comprises a pump shell (1), wherein a rotor cavity for mounting a rotor assembly is arranged on the pump shell (1), and the rotor cavity can be divided into a low-pressure area and a high-pressure area according to the positions of an oil inlet (8) and an oil outlet (9), and is characterized in that: a valve hole is formed in the pump shell (1), and a plunger (2), a spring (3) and a plug (4) are arranged in the valve hole; the side wall of the valve hole is provided with a low-pressure area interface for connecting a low-pressure area of an oil pump and a high-pressure area interface for connecting a high-pressure area of the oil pump; the two ends of the plunger (2) are thick and the middle is thin, a transfer chamber (5) is formed between the middle part of the plunger (2) and the side wall of the valve hole, one end of the plunger (2) is contacted with the spring (3), and a feedback cavity (6) is formed between the end part of the other end of the plunger and the bottom wall of the plug (4) or the valve hole; the feedback cavity (6) is connected with the main oil gallery or the pump outlet through an oil way, and a proportional electromagnetic valve (7) is arranged on the oil way; the proportional solenoid valve (7) can control whether and how much oil that gets into in feedback chamber (6), the size of oil pressure can influence the position of plunger (2) in the valve hole in feedback chamber (6).
2. The electric control variable flow oil pump according to claim 1, characterized in that: the plunger (2) is I-shaped as a whole.
3. The electric control variable flow oil pump according to claim 1, characterized in that: the plunger (2) is wholly in a goblet shape and comprises a cylindrical part, a rod-shaped part and a disc part, a protruding part is arranged on the end face of the disc part, the cylindrical part is used for containing a part of the spring (3), and the protruding part is in contact fit with the bottom wall of the plug (4) or the valve hole.
4. An electrically controlled variable flow oil pump according to any one of claims 1 to 3, characterized in that: the proportional solenoid valve (7) is provided with a port P, a port A and a port T, wherein the port P is communicated with the main oil gallery or the pump outlet, the port A is communicated with the feedback cavity, and the port T is communicated with the oil pan.
5. An electrically controlled variable flow oil pump according to any one of claims 1 to 3, characterized in that: the proportional electromagnetic valve (7) is arranged on a pump shell of the oil pump or a cylinder body of the engine.
6. An electrically controlled variable flow oil pump according to any one of claims 1 to 3, characterized in that: the oil pump is a gear pump, a rotor pump or a vane pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222609363.8U CN218327465U (en) | 2022-09-30 | 2022-09-30 | Electric control variable flow oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222609363.8U CN218327465U (en) | 2022-09-30 | 2022-09-30 | Electric control variable flow oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218327465U true CN218327465U (en) | 2023-01-17 |
Family
ID=84820960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222609363.8U Active CN218327465U (en) | 2022-09-30 | 2022-09-30 | Electric control variable flow oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218327465U (en) |
-
2022
- 2022-09-30 CN CN202222609363.8U patent/CN218327465U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No.69 Hengyue North Road, Chengguan Town, Hengdong County, Hengyang City, Hunan Province Patentee after: Hunan Meihu Intelligent Manufacturing Co.,Ltd. Country or region after: China Address before: No.69 Hengyue North Road, Chengguan Town, Hengdong County, Hengyang City, Hunan Province Patentee before: Hunan Oil Pump Co.,Ltd. Country or region before: China |