CN107725135B - Stepless adjusting type variable displacement oil pump - Google Patents
Stepless adjusting type variable displacement oil pump Download PDFInfo
- Publication number
- CN107725135B CN107725135B CN201711166741.7A CN201711166741A CN107725135B CN 107725135 B CN107725135 B CN 107725135B CN 201711166741 A CN201711166741 A CN 201711166741A CN 107725135 B CN107725135 B CN 107725135B
- Authority
- CN
- China
- Prior art keywords
- oil pump
- machine body
- piston
- oil
- slide valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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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
- F01M1/16—Controlling lubricant pressure or quantity
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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
- 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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N23/00—Special adaptations of check valves
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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
- F01M2001/023—Piston pumps
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a stepless adjustment type variable displacement oil pump, which comprises a machine body and a shell cover arranged on the machine body, wherein a slide valve is arranged in the machine body in a sliding manner, the eccentricity of the oil pump is changed along with the sliding of the slide valve, a hydraulic driving device comprises a piston cavity penetrating through the machine body and a piston sleeved in the piston cavity in a sliding manner, a flow control system is respectively connected with the machine body and the piston, real-time parameters of all flows in the machine body are sequentially fed back to the flow control system, and the flow control system controls the hydraulic driving device to drive the piston to move and drives the slide valve to move so as to control the displacement of the oil. The invention changes the eccentricity of the oil pump by controlling the position movement of the piston to drive the slide valve to move, thereby changing the discharge capacity of the oil pump, not only considering the rotating speed of the engine but also considering the influence of the temperature of the oil in the process of adjusting the flow of the oil, and ensuring that the lubricating system of the engine has the optimal flow of the oil at any rotating speed and any temperature.
Description
Technical Field
The invention relates to an oil pump, in particular to a stepless adjusting type variable displacement oil pump.
Background
Energy conservation and emission reduction are development trends of modern engines, the engine has different requirements on engine oil flow under different rotating speeds, the existing variable displacement type engine oil pump generally only realizes two-stage flow adjustment, a simple and effective stepless adjusting device is lacked, and an optimal engine oil flow at any rotating speed and at any temperature of an engine lubricating system cannot be ensured.
In summary, in order to achieve stepless adjustment of the oil flow, a variable displacement oil pump with a simple structure and high efficiency needs to be designed at present.
Disclosure of Invention
The invention aims to solve the technical problem that the existing variable displacement type oil pump is lack of a stepless flow regulating device.
In order to solve the technical problems, the technical scheme adopted by the invention is to provide a stepless adjustment type variable displacement oil pump, which comprises a machine body and a shell cover arranged on the machine body, wherein a slide valve is arranged in the machine body in a sliding manner, the eccentricity of the oil pump is changed along with the sliding of the slide valve, the slide valve divides the interior of the machine body into a first pressure adjusting cavity and a second pressure adjusting cavity along the sliding direction, an adjusting spring is compressed between the slide valve and the machine body in the second pressure adjusting cavity, an impeller driving shaft is arranged in the slide valve in a penetrating and rotating manner, the stepless adjustment type variable displacement oil pump further comprises a hydraulic driving device and a flow control system, the hydraulic driving device comprises a piston cavity arranged in the machine body in a penetrating manner and a piston sleeved in the piston cavity in a sliding manner, the right end of the piston extends into the machine body and abuts against the outer side wall of, the left end of the piston moves in the piston cavity, the flow control system is respectively connected with the machine body and the piston and is configured to sequentially feed back flow real-time parameters in the machine body to the flow control system, and the flow control system controls the hydraulic driving device to drive the piston to move and drives the slide valve to move so as to control the discharge capacity of the engine oil pump.
In the above scheme, the flow control system sequentially includes an electronic control unit connected to an oil pan of an oil pump, an external engine, and the piston, and the electronic control unit feeds back pressure information, load information, temperature information, position information of the piston, and rotational speed information of the impeller driving shaft in the engine body to the flow control system.
In the above scheme, a map table is arranged in the electronic control unit, the electronic control unit correspondingly displays the pressure information, the load information, the temperature information, the position information and the rotating speed information on the map table, and the flow control system controls the displacement of the oil pump according to the feedback information.
In the scheme, the flow control system controls the pressure in the piston cavity according to the feedback information and enables the piston to move rightwards, so that the displacement of the oil pump is reduced.
In the above scheme, a high-pressure oil pump is connected between the oil pan and the piston.
In the above scheme, the piston cavity forms an opening connected with the high-pressure oil pump at one end penetrating out of the machine body.
In the above scheme, a main oil supply duct, an oil inlet cavity and an oil outlet cavity which are respectively communicated with the main oil supply duct are further integrally formed in the machine body, and the generator provides power for the impeller driving shaft.
In the above scheme, the machine body is provided with a first pressure relief oil passage and a second pressure relief oil passage which are respectively communicated with the main oil supply oil passage, and the first pressure relief oil passage and the second pressure relief oil passage are respectively communicated with the first pressure adjusting cavity and the second pressure adjusting cavity.
In the above aspect, an area of action of the first pressure regulation chamber on the spool is larger than an area of action of the second pressure regulation chamber on the spool.
In the above scheme, the outer end of the impeller driving shaft is connected with the crankshaft of the engine through a belt.
According to the invention, the eccentricity of the oil pump is changed by controlling the position movement of the piston to drive the slide valve to move, so that the displacement of the oil pump is changed, the rotating speed of the engine and the influence of the temperature of the oil are considered in the process of adjusting the flow of the oil, the displacement of the oil pump is finally controlled by controlling the high-pressure oil pump through the electric control unit, and the optimal oil flow of the engine lubrication system at any rotating speed and any temperature is ensured.
Drawings
FIG. 1 is a schematic view of the middle section of the present invention;
FIG. 2 is a schematic view of the present invention;
FIG. 3 is a control flow chart of the present invention.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 3, the stepless adjustable variable displacement oil pump provided by the present invention comprises a machine body 11, a cover and a cover 15 on the machine body 11, wherein a slide valve 9 is arranged in the machine body 11 in a sliding manner, an oil pump 18 changes eccentricity along with the sliding of the slide valve 9, the slide valve 9 divides the interior of the machine body 11 into a first pressure adjusting cavity 3 and a second pressure adjusting cavity 4 along the sliding direction, an adjusting spring 7 is arranged in the second pressure adjusting cavity 4 in a compression manner between the slide valve 9 and the machine body 11, an impeller driving shaft 8 is arranged in the slide valve 9 in a penetrating and rotating manner, and the outer end of the impeller driving shaft 8 is connected with a crankshaft of an engine through a driving shaft sprocket 16 and a belt.
The main oil supply duct, the oil inlet cavity 5 and the oil outlet cavity 6 which are respectively communicated with the main oil supply duct are further integrally formed in the machine body 11, and the generator provides power for the impeller driving shaft 8. A first oil inlet 1 and a second oil inlet 2 which are respectively communicated with a main oil supply duct are formed in the machine body 11, the first oil inlet 1 and the second oil inlet 2 are respectively communicated with a first pressure adjusting cavity 3 and a second pressure adjusting cavity 4, and the acting area of the first pressure adjusting cavity 3 on the slide valve 9 is larger than that of the second pressure adjusting cavity 4 on the slide valve 9.
As shown in fig. 3, the core of the present invention further includes a hydraulic driving device and a flow control system, the hydraulic driving device includes a piston cavity 10 penetrating through the machine body 11 and a piston 12 slidably sleeved in the piston cavity 10, a right end of the piston 12 extends into the machine body 11 and abuts against an outer side wall of the slide valve 9, a left end of the piston 12 moves in the piston cavity 10, a high pressure oil pump 14 is connected between the oil pan 13 and the piston 12, and an opening connected with the high pressure oil pump 14 is formed at one end of the piston cavity 10 penetrating through the machine body 11.
The flow control system is respectively connected with the machine body 11 and the piston 12, real-time flow parameters in the machine body 11 are sequentially fed back to the flow control system, then the flow control system controls the hydraulic driving device to drive the piston 12 to move and drive the slide valve 9 to move, and therefore the purpose of real-time stepless control of the discharge capacity of the engine oil pump is achieved.
The flow control system comprises an electronic control unit 24 which is respectively connected with an oil pan 13 of the oil pump 18, an external engine 17 and the piston 12, and when the flow control system works, the electronic control unit 24 respectively feeds back pressure information 22, load information 21, temperature information 23, position information of the piston 12 and rotating speed information 19 of the impeller driving shaft 8 in the machine body 11 to the flow control system. The electronic control unit 24 is provided with a map table, the electronic control unit 24 correspondingly displays the pressure information 22, the load information 21, the temperature information 23, the position information 20 and the rotating speed information 19 on the map table, and the flow control system controls the pressure in the piston cavity 10 and enables the piston 12 to move rightwards according to the feedback information, so that the displacement of the oil pump 18 is reduced, and the purpose of stepless regulation of the displacement is achieved.
When the slide valve 9 is positioned at the leftmost side, the eccentricity of the oil pump is the largest, and the displacement of the oil pump is the largest.
When the engine is just started, because the temperature of the engine oil is low and the rotating speed of the engine is low, in order to meet the requirement of a lubricating system on the amount of the engine oil in the starting process of the engine, the high-pressure oil pump does not work, the pressure of the engine oil in the piston cavity is low, and because of the action of the pretightening force of the adjusting spring, the slide valve is always positioned at the leftmost position, at the moment, the amount of the engine oil pumped by the engine oil pump per revolution is maximum, and along with the increase of the rotating.
When the engine normally works, the required lubricating oil amount is larger along with the increase of the rotating speed of the engine, and for a common oil pump, the pumped flow is in direct proportion to the rotating speed, so that the oil pump pumps excessive oil under the condition of high rotating speed, and the power waste and the oil consumption are increased. According to the invention, the high-pressure oil pump is controlled through load feedback, temperature feedback, load feedback and piston position feedback, so that the pressure in the piston cavity of the hydraulic driving device is increased, the piston drives the slide valve to move rightwards at the moment, the discharge capacity of the oil pump is reduced, and the stepless regulation of the flow of the oil pump is completed. On the control logic, closed loop control is used, so that the control is more accurate.
According to the invention, the eccentricity of the oil pump is changed by controlling the position movement of the piston to drive the slide valve to move, so that the displacement of the oil pump is changed, the rotating speed of the engine and the influence of the temperature of the oil are considered in the process of adjusting the flow of the oil, the displacement of the oil pump is finally controlled by controlling the high-pressure oil pump through the electric control unit, and the optimal oil flow of the engine lubrication system at any rotating speed and any temperature is ensured.
The present invention is not limited to the above-mentioned preferred embodiments, and any structural changes made under the teaching of the present invention shall fall within the protection scope of the present invention, which has the same or similar technical solutions as the present invention.
Claims (5)
1. The stepless adjustment type variable displacement oil pump comprises a machine body and a shell cover arranged on the machine body, and is characterized in that a slide valve is arranged in the machine body in a sliding mode, the eccentricity of the oil pump is changed along with the sliding of the slide valve, the slide valve divides the interior of the machine body into a first pressure adjusting cavity and a second pressure adjusting cavity along the sliding direction, an adjusting spring is arranged in the second pressure adjusting cavity in a compressing mode between the slide valve and the machine body, an impeller driving shaft penetrates through the slide valve and is rotatably arranged in the slide valve, the stepless adjustment type variable displacement oil pump further comprises a hydraulic driving device and a flow control system, the hydraulic driving device comprises a piston cavity penetrating through the machine body and a piston sleeved in the piston cavity in a sliding mode, the right end of the piston extends into the machine body and abuts against the outer side wall of the slide valve, and the left end of the piston moves in, the flow control system is respectively connected with the machine body and the piston and is configured to sequentially feed back various flow real-time parameters in the machine body to the flow control system, the flow control system respectively controls the pressure in the piston cavity according to feedback information and controls the hydraulic driving device to drive the piston to move rightwards from the initial position of the leftmost end and drive the slide valve to move so as to control the displacement of the oil pump to descend, when the slide valve is positioned at the leftmost end, the eccentricity of the oil pump is the largest, the displacement of the oil pump is the largest, the flow control system sequentially comprises an oil pan of the oil pump, an external engine and an electric control unit which is respectively connected with the piston, and the electric control unit respectively feeds back pressure information, load information, temperature information, position information of the piston and rotating speed information of the impeller driving shaft in the machine body to the flow control system, and a high-pressure oil pump is connected between the oil pan and the piston, and an opening connected with the high-pressure oil pump is formed at one end of the piston cavity penetrating out of the machine body.
2. The stepless adjustable variable displacement oil pump according to claim 1, wherein a map table is provided in the electronic control unit, the electronic control unit correspondingly displays the pressure information, the load information, the temperature information, the position information and the rotating speed information on the map table, and the flow control system controls the displacement of the oil pump according to the feedback information.
3. The stepless adjustable variable displacement oil pump according to claim 1, wherein a main oil supply passage, an oil inlet cavity and an oil outlet cavity which are respectively communicated with the main oil supply passage are further integrally formed in the machine body, and the outer end of the impeller driving shaft is connected with a crankshaft of the engine through a driving shaft chain wheel and a belt.
4. The continuously adjustable variable displacement oil pump according to claim 3, wherein the housing defines a first pressure relief oil passage and a second pressure relief oil passage that are in communication with the main oil supply passage, respectively, and the first pressure relief oil passage and the second pressure relief oil passage are in communication with the first pressure regulation chamber and the second pressure regulation chamber, respectively.
5. The continuously adjustable variable displacement oil pump according to claim 1, wherein an acting area of the first pressure regulating chamber on the spool valve is larger than an acting area of the second pressure regulating chamber on the spool valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711166741.7A CN107725135B (en) | 2017-11-21 | 2017-11-21 | Stepless adjusting type variable displacement oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711166741.7A CN107725135B (en) | 2017-11-21 | 2017-11-21 | Stepless adjusting type variable displacement oil pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107725135A CN107725135A (en) | 2018-02-23 |
| CN107725135B true CN107725135B (en) | 2021-02-26 |
Family
ID=61217843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711166741.7A Expired - Fee Related CN107725135B (en) | 2017-11-21 | 2017-11-21 | Stepless adjusting type variable displacement oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107725135B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6715294B2 (en) | 2018-09-06 | 2020-07-01 | 本田技研工業株式会社 | Control device for internal combustion engine |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10023330C1 (en) * | 2000-05-12 | 2001-10-18 | Daimler Chrysler Ag | Variable pump for lubrication of IC engine has regulation device controlling volumetric flow and/or pressure in pressure line leading to engine |
| JP6094077B2 (en) * | 2012-07-12 | 2017-03-15 | 株式会社ジェイテクト | Oil pump system |
| CN103775811A (en) * | 2012-10-24 | 2014-05-07 | 北京汽车动力总成有限公司 | Oil pump with variable displacement |
| US9759103B2 (en) * | 2013-03-18 | 2017-09-12 | Pierburg Pump Technology Gmbh | Lubricant vane pump |
| KR20150071188A (en) * | 2013-12-18 | 2015-06-26 | 현대자동차주식회사 | Pump structure |
| CN106567755A (en) * | 2016-11-04 | 2017-04-19 | 中国第汽车股份有限公司 | Variable displacement oil pump control system and control method thereof |
| CN207568675U (en) * | 2017-11-21 | 2018-07-03 | 吉林大学 | Electrodeless adjustable displacement formula lubricating oil pump |
-
2017
- 2017-11-21 CN CN201711166741.7A patent/CN107725135B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN107725135A (en) | 2018-02-23 |
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