CN212744319U - Control system based on pressure relief type variable pump - Google Patents
Control system based on pressure relief type variable pump Download PDFInfo
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- CN212744319U CN212744319U CN202021584899.3U CN202021584899U CN212744319U CN 212744319 U CN212744319 U CN 212744319U CN 202021584899 U CN202021584899 U CN 202021584899U CN 212744319 U CN212744319 U CN 212744319U
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Abstract
The utility model provides a control system based on pressure relief type variable displacement pump, including pressure relief type variable displacement pump, pilot valve, solenoid valve, pump export, main oil gallery, oil pan, ECU, pressure relief type variable displacement pump is equipped with first feedback oil pocket and second feedback oil pocket; the first feedback oil cavity and the second feedback oil cavity are respectively communicated with the pump outlet or the main oil channel through oil channels, wherein a pilot valve is arranged on the oil channel between the second feedback oil cavity and the pump outlet or the main oil channel and comprises a control cavity and a transfer chamber; the electromagnetic valve is arranged on an oil path between a control cavity of the pilot valve and the main oil duct, feedback oil from the main oil duct controls the pilot valve through the electromagnetic valve, and along with the movement of a valve core of the pilot valve, the second feedback oil cavity is alternatively communicated with an outlet/the main oil duct or an oil pan of the pump through a transfer chamber of the pilot valve. The utility model discloses a combination of proportional solenoid valve and pilot valve has realized the full variable displacement control of pressure release formula variable displacement pump, and the control accuracy obtains obviously improving.
Description
Technical Field
The utility model relates to an internal-combustion engine lubricating system technical field, in particular to control system based on pressure release formula variable pump.
Background
The full-variable displacement engine oil pump control system can supply oil to an engine lubricating system as required, and the energy-saving effect is improved. In the prior art, a fully-variable displacement engine oil pump control system generally adopts a booster type, namely, the oil pressure of a main oil duct drives a slide block variable through a proportional solenoid valve, and the variable mode lacks a pressure compensation control device and has poor control precision and response time; the pressure relief type variable displacement pump is mainly a two-stage variable displacement pump controlled by a switching solenoid valve, but the displacement cannot be fully variable.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a control system based on pressure release formula variable displacement pump realizes that the discharge capacity is fully variable.
In order to solve the technical problem, the utility model discloses a following technical scheme: a control system based on a pressure relief type variable pump comprises the pressure relief type variable pump, a pilot valve, an electromagnetic valve, a pump outlet, a main oil duct, an oil pan and an ECU (electronic control Unit), wherein the pressure relief type variable pump comprises a pump body, a variable slider, a variable spring, a first feedback oil cavity and a second feedback oil cavity, the first feedback oil cavity is arranged on one side of the variable slider, and the second feedback oil cavity and the variable spring are arranged on the other side of the variable slider; the first feedback oil cavity and the second feedback oil cavity are respectively communicated with the pump outlet or the main oil channel through oil channels, wherein a pilot valve is arranged on the oil channel between the second feedback oil cavity and the pump outlet or the main oil channel and comprises a control cavity and a transfer chamber; the electromagnetic valve is arranged on an oil path between a control cavity of the pilot valve and the main oil duct, feedback oil from the main oil duct controls the pilot valve through the electromagnetic valve, and a second feedback oil cavity is alternatively communicated with an outlet of the pump/the main oil duct or an oil pan through a transfer chamber of the pilot valve along with the movement of a valve core of the pilot valve; when the second feedback oil cavity is communicated with the oil pan, the oil pressure in the first feedback oil cavity is greater than the sum of the oil pressure in the second feedback oil cavity and the pretightening force of the variable spring, and the oil pressure in the first feedback oil cavity can push the variable slider to compress the variable spring to move radially, so that the eccentric quantity of the variable slider and the rotor is reduced, and the output displacement is reduced.
Furthermore, a damping hole is arranged on an oil path between the pilot valve and the pump outlet or the main oil gallery.
Preferably, the electromagnetic valve is a proportional electromagnetic valve, and the output pressure of the proportional electromagnetic valve is realized by adjusting the duty ratio of the proportional electromagnetic valve by the ECU according to the collected sensor signals.
Further, a safety valve is mounted on an oil path between the pump outlet and the oil pan.
The utility model discloses a combination of proportional solenoid valve and pilot valve has realized the full variable displacement control of pressure release formula variable displacement pump, and the control accuracy obtains obviously improving, and response time obtains obviously shortening, has greatly promoted engine lubrication system's energy-conserving effect.
Drawings
Fig. 1 is a schematic structural diagram of a control system in embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of a control system in embodiment 2 of the present invention;
the reference signs are:
1-pressure relief type variable displacement pump 1 a-first control cavity 1 b-second control cavity
2-pilot valve 3-electromagnetic valve 4-pump outlet
5-main oil gallery 6-ECU 7-damping hole
8-safety valve.
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 "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any 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, the control system based on the pressure relief type variable displacement pump comprises a pressure relief type variable displacement pump 1, a pilot valve 2, a proportional electromagnetic valve 3, a pump outlet 4, a main oil gallery 5, an oil pan, a machine cooler, a machine filter, an ECU6, a pressure sensor, a rotation speed sensor, a load sensor and an oil temperature sensor; the pressure relief type variable pump comprises a pump body, a variable slider, a variable spring, a first feedback oil cavity 1a and a second feedback oil cavity 1b, wherein the first feedback oil cavity 1a is arranged on one side of the variable slider, and the second feedback oil cavity 1b and the variable spring are arranged on the other side of the variable slider; the first feedback oil cavity 1a and the second feedback oil cavity 1b are respectively communicated with the pump outlet 4 through oil paths, wherein a pilot valve 2 is arranged on the oil path between the second feedback oil cavity 1b and the pump outlet 4, and the pilot valve 2 comprises a control cavity and a transfer chamber; a damping hole 7 is arranged on an oil path between the transfer chamber of the pilot valve 2 and the pump outlet 4; the proportional solenoid valve 3 is arranged on an oil path between the control cavity of the pilot valve 2 and the main oil duct 5, the ECU6 adjusts the duty ratio of the proportional solenoid valve 3 according to the collected sensor signals, feedback oil from the main oil duct 5 enters the control cavity of the pilot valve 2 through the proportional solenoid valve 3 and pushes the valve core of the pilot valve 2 to move, and along with the movement of the valve core of the pilot valve 2, the second feedback oil cavity 1b is alternatively communicated with the pump outlet 4 or the oil pan through a transfer chamber of the pilot valve 2; when the second feedback oil cavity 1b is communicated with the oil pan, the oil pressure in the first feedback oil cavity 1a is greater than the sum of the oil pressure in the second feedback oil cavity 1b and the pretightening force of the variable spring, and the oil pressure in the first feedback oil cavity 1a can push the variable slider to compress the variable spring to move radially, so that the eccentricity of the variable slider and the rotor is reduced, and the output displacement is reduced; and a safety valve 8 is arranged on an oil path between the pump outlet 4 and the oil pan.
Example 2
A control system based on a pressure relief type variable displacement pump as shown in fig. 2 is basically the same in structure and operation as embodiment 1, except that: in this embodiment, the first feedback oil chamber 1a and the second feedback oil chamber 1b are respectively communicated with the main oil gallery 5 through oil passages, wherein a pilot valve 2 is arranged on the oil passage between the second feedback oil chamber 1b and the main oil gallery 5, and a damping hole 7 is arranged on the oil passage between the relay chamber of the pilot valve 2 and the main oil gallery 5. That is to say, the feedback oil in the first feedback oil chamber 1a and the second feedback oil chamber 1b in the present embodiment is from the main oil gallery 5, while the feedback oil in the embodiment 1 is from the pump outlet 4, in comparison, the cleanliness of the oil in the main oil gallery 5 is better due to the machine cooling and the machine filtering, the feedback oil passage is not easy to be blocked, and the variable jamming is avoided.
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 (4)
1. A control system based on pressure relief type variable pump is characterized in that: the variable displacement pump comprises a pressure relief type variable displacement pump (1), a pilot valve (2), an electromagnetic valve (3), a pump outlet (4), a main oil duct (5), an oil pan and an ECU (6), wherein the pressure relief type variable displacement pump (1) comprises a pump body, a rotor, a variable sliding block, a variable spring, a first feedback oil cavity (1 a) and a second feedback oil cavity (1 b), the first feedback oil cavity (1 a) is arranged on one side of the variable sliding block, and the second feedback oil cavity (1 b) and the variable spring are arranged on the other side of the variable sliding block; the first feedback oil cavity (1 a) and the second feedback oil cavity (1 b) are respectively communicated with a pump outlet (4) or a main oil duct (5) through oil ways, wherein a pilot valve (2) is arranged on the oil way between the second feedback oil cavity (1 b) and the pump outlet (4) or the main oil duct (5), and the pilot valve (2) comprises a control cavity and a transfer chamber; the electromagnetic valve (3) is arranged on an oil path between a control cavity of the pilot valve (2) and the main oil duct (5), feedback oil from the main oil duct (5) controls the pilot valve (2) through the electromagnetic valve (3), and along with the movement of a valve core of the pilot valve (2), the second feedback oil cavity (1 b) is alternatively communicated with the pump outlet (4)/the main oil duct (5) or an oil pan through a transfer chamber of the pilot valve (2); when the second feedback oil cavity (1 b) is communicated with the oil pan, the oil pressure in the first feedback oil cavity (1 a) is greater than the sum of the oil pressure in the second feedback oil cavity (1 b) and the pretightening force of the variable spring, and the oil pressure in the first feedback oil cavity (1 a) can push the variable slider to compress the variable spring to move radially, so that the eccentric quantity of the variable slider and the rotor is reduced, and the output displacement is reduced.
2. The pressure relief variable displacement pump-based control system of claim 1, wherein: and a damping hole (7) is arranged on an oil path between the pilot valve (2) and the pump outlet (4) or the main oil gallery (5).
3. The pressure relief variable displacement pump-based control system of claim 1, wherein: the electromagnetic valve (3) is a proportional electromagnetic valve, and the output pressure of the proportional electromagnetic valve is realized by adjusting the duty ratio of the proportional electromagnetic valve according to the collected sensor signals by the ECU (6).
4. The pressure relief variable displacement pump-based control system of claim 1, wherein: and a safety valve (8) is arranged on an oil circuit between the pump outlet (4) and the oil pan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021584899.3U CN212744319U (en) | 2020-08-04 | 2020-08-04 | Control system based on pressure relief type variable pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021584899.3U CN212744319U (en) | 2020-08-04 | 2020-08-04 | Control system based on pressure relief type variable pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212744319U true CN212744319U (en) | 2021-03-19 |
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ID=74987530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021584899.3U Active CN212744319U (en) | 2020-08-04 | 2020-08-04 | Control system based on pressure relief type variable pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212744319U (en) |
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2020
- 2020-08-04 CN CN202021584899.3U patent/CN212744319U/en active Active
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