CN109469528A - A kind of change discharge capacity inner-rotor-type lubricating oil pump - Google Patents
A kind of change discharge capacity inner-rotor-type lubricating oil pump Download PDFInfo
- Publication number
- CN109469528A CN109469528A CN201811625086.1A CN201811625086A CN109469528A CN 109469528 A CN109469528 A CN 109469528A CN 201811625086 A CN201811625086 A CN 201811625086A CN 109469528 A CN109469528 A CN 109469528A
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- Prior art keywords
- valve
- oil pump
- rotor
- slide
- oil
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- 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.)
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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
- F01M1/02—Pressure lubrication using lubricating pumps
-
- 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
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/10—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by changing the positions of the inlet or outlet openings with respect to the working chamber
- F04C14/12—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by changing the positions of the inlet or outlet openings with respect to the working chamber using sliding 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
- F01M2001/0238—Rotary pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Rotary Pumps (AREA)
Abstract
The invention discloses a kind of change discharge capacity inner-rotor-type lubricating oil pump, it is related to vehicular engine lubrication technical field, the device includes rotor-type oil pump shell, internal rotor, outer rotor, inlet port, oil outlet, pressure limiting valve, relief valve, drive shaft, the side of the machine oil pump case is rotatably connected to drive shaft, the drive shaft is connected with internal rotor close to one end of machine oil pump case, the internal rotor is rotated coaxially with drive shaft, outer rotor corresponding with internal rotor is provided on the outside of the internal rotor, the outer rotor and internal rotor eccentric setting and intermeshing, the outer rotor is fixedly installed lubricating oil pump end cap far from the side of drive shaft, the lubricating oil pump end cap is fixedly connected by screw with machine oil pump case, the following distance for being internally located at internal rotor of the machine oil pump case offers oil sucting cavity, the machine oil pump case is internally located at internal rotor Side and top offer level-one oil pocket corresponding with oil sucting cavity and second level oil pocket respectively.
Description
Technical field
The present invention relates to vehicular engine lubrication technical field, specially a kind of change discharge capacity inner-rotor-type lubricating oil pump.
Background technique
The effect of lubricating oil pump is to recycle machine oil in lubrication road oil delivery to each friction part of engine, with
Guarantee that each components of engine obtain good lubrication.Conventional engines fuel pump structure is simple, cannot be according to engine not
Same revolving speed is to provide the machine oil of different pressures, and under slow-speed of revolution operating condition, oil pressure is too small out, and part cannot be good
Lubrication, affect the reliability of engine component, when engine enters high speed operating condition, oil outlet pressure is then anxious
Play rises, and mechanical output loss is excessive, and engine fuel economy is caused to decline.
Summary of the invention
For the deficiency of available engine lubricating oil pump technology, the present invention provides a kind of change discharge capacity inner-rotor-type lubricating oil pump,
It realizes engine and becomes the reliable and stable work of displacement oil pump.
In order to achieve the above object, the present invention is achieved by the following technical programs: a kind of change discharge capacity inner-rotor-type machine oil
Pump, including machine oil pump case, the side of the machine oil pump case are rotatably connected to drive shaft, the drive shaft close to machine oil pump case one
End is connected with internal rotor, and the internal rotor is rotated coaxially with drive shaft, is provided on the outside of the internal rotor corresponding with internal rotor
Outer rotor, the outer rotor and internal rotor eccentric setting and intermeshing, the outer rotor fixes far from the side of drive shaft
It is provided with lubricating oil pump end cap, the lubricating oil pump end cap is fixedly connected by screw with machine oil pump case, the inside of the machine oil pump case
Oil sucting cavity, the side and top for being internally located at internal rotor of the machine oil pump case are offered positioned at the following distance of internal rotor
Offer level-one oil pocket corresponding with oil sucting cavity and second level oil pocket respectively, the machine oil pump case to be internally located at level-one oil pocket separate
One end of internal rotor is fixedly installed the first relief valve, and the machine oil pump case is internally located at one of second level oil pocket far from internal rotor
End is fixedly installed the second relief valve, the top certain distance for being internally located at level-one oil pocket and second level oil pocket of the machine oil pump case
Be fixedly installed slide-valve, the slide-valve is internally provided with sliding valve core, the sliding valve core and slide-valve be coaxially disposed and
It is slidably connected, the side for being internally located at sliding valve core of the slide-valve is provided with slide-valve preloading spring, the machine oil pump case
Side be located at slide-valve preloading spring one end of sliding valve core be provided with slide-valve nut, the slide-valve is far from sliding
One end of valve nut offers slide-valve oil outlet, and the slide-valve offers slide-valve emptying close to one end of slide-valve nut
Mouthful, the middle part side of the oil sucting cavity and slide-valve offers the first oil duct, between the second level oil pocket and slide-valve oil outlet
The second oil duct is offered, offers third oil duct in the middle part of the second level oil pocket and slide-valve.
Preferably, first relief valve includes the first pressure release valve casing, and the first pressure release valve casing is internally provided with the
One relief valve core, first relief valve core are coaxially disposed and are slidably connected with the first pressure release valve casing, first pressure release
One end for being internally located at the first relief valve core of valve casing is provided with the first relief valve preloading spring, and first relief valve pre-tightens
Spring is fixedly installed the first relief valve nut far from one end of the first relief valve core, and the outer wall of the first pressure release valve casing is remote
One end from the first relief valve nut offers the first relief valve oil inlet, and the side of the outer wall of the first pressure release valve casing is located at
First relief valve core offers the first relief valve oil outlet far from one end of the first relief valve preloading spring.
Preferably, the pumping cavity is divided into level-one oil pocket and the independent two parts of second level oil pocket, described and oil sucting cavity, level-one
Oil pocket and second level oil pocket volume are equal.
Preferably, the side that the outer wall of first relief valve is located at the first relief valve oil outlet is provided with the first relief valve
Control terminal.
Preferably, the side of the close slide-valve unloading port of the slide-valve opens up that there are two unloading port and slide-valve emptyings
Mouth is connected.
Preferably, the sliding valve core is three stage structure.
Preferably, the second level oil pocket is fixedly installed the second relief valve far from one end of internal rotor, described and second lets out
Pressure valve possesses internal structure similar with the first relief valve.
Preferably, one end of first gate gurgle valve, the second relief valve and slide-valve is connected with oil pump body by screw thread
It connects.
The invention has the following advantages:
1, oil outlet pressure is adjusted by Novel sliding valve, four kinds of states of slide-valve spool position can correspond to four
Kind different oil outlet pressure meets engine start, idling, accelerates and the four kinds of working conditions that run at high speed, starts in satisfaction
Under conditions of machine lubrication needs, power is saved.
2, simple and compact for structure, oil outlet pressure is adjusted by slide-valve, it is mechanical to overcome tradition machinery variable-displacement pump
The shortcomings that structure is complicated, stable and reliable in work, mechanical wear is small.
3, by way of dividing lubricating oil pump pumping cavity, a crescent gear pump is divided into two lubricating oil pump, phase
Than in two small-sized lubricating oil pump are arranged, structure is more compact, and functional reliability significantly improves.With original single-stage inner-rotor-type machine
Oil pump is compared, and mounting structure size can directly substitute existing lubricating oil pump product without significant changes.
Detailed description of the invention
Fig. 1 is a kind of change discharge capacity inner-rotor-type fuel pump structure explosive view of the present invention；
Fig. 2 is a kind of change discharge capacity inner-rotor-type fuel pump structure cross-sectional view of the present invention；
Fig. 3 is the partial enlarged view in Fig. 2 at A；
Fig. 4 is a kind of explosive view for the overflow valve for becoming discharge capacity inner-rotor-type lubricating oil pump of the present invention；
Fig. 5 is a kind of cross-sectional view for the overflow valve for becoming discharge capacity inner-rotor-type lubricating oil pump of the present invention；
Fig. 6 is a kind of oil outlet pressure for becoming discharge capacity inner-rotor-type lubricating oil pump of the present invention with rotation speed change scatter plot；
Wherein each appended drawing reference meaning: 1- machine oil pump case, 2- drive shaft, 3- internal rotor, 4- outer rotor, 5- lubricating oil pump end cap, 6-
Screw, 7- oil sucting cavity, 8- level-one oil pocket, 9- second level oil pocket, the first relief valve of 10-, the second relief valve of 11-, 12- slide-valve, 13-
Sliding valve core, 14- slide-valve preloading spring, 15- slide-valve nut, 16- slide-valve oil outlet, 17- slide-valve unloading port, 18-
First oil duct, the second oil duct of 19-, 20- third oil duct, the first pressure release of 21- valve casing, the first relief valve core of 22-, 23- first are let out
Pressure valve preloading spring, the first relief valve of 24- nut, the first relief valve of 25- oil inlet, the first relief valve of 26- oil outlet, 27-
One relief valve control terminal.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in figures 1 to 6, the embodiment of the invention provides a kind of change discharge capacity inner-rotor-type lubricating oil pump, including machine oil pump case 1,
The side of machine oil pump case 1 is rotatably connected to drive shaft 2, and drive shaft 2 is connected with internal rotor 3 close to one end of machine oil pump case 1, and interior turn
Son 3 is rotated coaxially with drive shaft 2, and the outside of internal rotor 3 is provided with outer rotor 4 corresponding with internal rotor 3, outer rotor 4 and interior turn
Sub 3 eccentric settings and intermeshing, outer rotor 4 are fixedly installed lubricating oil pump end cap 5, lubricating oil pump end far from the side of drive shaft 2
Lid 5 is fixedly connected by screw 6 with machine oil pump case 1, and the following distance for being internally located at internal rotor 3 of machine oil pump case 1 opens up
There is oil sucting cavity 7, the side for being internally located at internal rotor 3 of machine oil pump case 1 and top offer level-one corresponding with oil sucting cavity 7 respectively
The level-one oil pocket 8 that is internally located at of oil pocket 8 and second level oil pocket 9, machine oil pump case 1 is fixedly installed first far from one end of internal rotor 3
The second level oil pocket 9 that is internally located at of relief valve 10, machine oil pump case 1 is fixedly installed the second relief valve 11 far from one end of internal rotor 3,
Machine oil pump case 1 be internally located at level-one oil pocket 8 and the top certain distance of second level oil pocket 9 is fixedly installed slide-valve 12, sliding
Valve 12 is internally provided with sliding valve core 13, and sliding valve core 13 is coaxially disposed and is slidably connected with slide-valve 12, slide-valve 12 it is interior
The side that portion is located at sliding valve core 13 is provided with slide-valve preloading spring 14, and the side of machine oil pump case 1 is located at slide-valve and pre-tightens bullet
Spring 14 is provided with slide-valve nut 15 far from one end of sliding valve core 13, and slide-valve 12 is opened up far from one end of slide-valve nut 15
Have a slide-valve oil outlet 16, slide-valve 12 offers slide-valve unloading port 17 close to one end of slide-valve nut 15, oil sucting cavity 7 with
The middle part side of slide-valve 12 offers the first oil duct 18, and the second oil is offered between second level oil pocket 9 and slide-valve oil outlet 16
The middle part of road 19, second level oil pocket 9 and slide-valve 12 offers third oil duct 20.
First relief valve 10 includes the first pressure release valve casing 21, and the first pressure release valve casing 21 is internally provided with the first relief valve valve
Core 22, the first relief valve core 22 are coaxially disposed and are slidably connected with the first pressure release valve casing 21, the inside of the first pressure release valve casing 21
One end of first relief valve core 22 is provided with the first relief valve preloading spring 23, the first relief valve preloading spring 23 is separate
One end of first relief valve core 22 is fixedly installed the first relief valve nut 24, and the outer wall of the first pressure release valve casing 21 is far from first
One end of relief valve nut 24 offers the first relief valve oil inlet 25, and the side of the outer wall of the first pressure release valve casing 21 is located at first
Relief valve core 22 offers the first relief valve oil outlet 26 far from one end of the first relief valve preloading spring 23, realizes level-one pressure
Oil pocket decompression protection prevents oil pressure excessive.Pumping cavity is divided into level-one oil pocket 8 and the independent two parts of second level oil pocket 9, and oil sucting cavity
7, level-one oil pocket 8 is equal with 9 volume of second level oil pocket, and a hydraulic oil pump is split as one, two two-stage oil pumps.First relief valve 10
Outer wall be located at the side of the first relief valve oil outlet 26 and be provided with the first relief valve control terminal 27, realization, which obtains oil pressure, remotely to be controlled
System.The side of the close slide-valve unloading port 17 of slide-valve 12, which is opened up, to be connected there are two unloading port with slide-valve unloading port 17, leads to
It crosses two pressure release oil circuits and realizes second voltage regulation.Sliding valve core 13 is three stage structure, realizes second voltage regulation by three stage structure.
Second level oil pocket 9 is fixedly installed the second relief valve 11 far from one end of internal rotor 3, and the second relief valve 11 possesses and the first pressure release
The similar internal structure of valve 10 realizes second level pumping cavity decompression protection, prevents oil pressure excessive.First gate gurgle valve 10, the second pressure release
One end of valve 11 and slide-valve 12 is connected through a screw thread with oil pump body, is connected through a screw thread, simple in construction, easy to disassemble and assemble.
Just start in engine, when revolving speed is lower, sliding valve core 13 is located at left end, and primary pump and two stage pump simultaneously can
To oil outlet fuel feeding, can cracking increase oil outlet pressure, provide lubrication in time for engine components, oil outlet pressure with
First segment in rotation speed change curve corresponding diagram 6.As engine speed further increases, oil outlet pressure increases, fuel-displaced oral fluid
Oil pressure is gradually increased, and sliding valve core 13 is under hydraulic fluid pressure effect, and to the mobile a distance in left end, primary pump can be after
Continue to oil transportation confession oil, but two stage pump has connected the oil circuit of oil return box, hydraulic oil directly flows back to fuel tank, just starts one in engine
After the section time, revolving speed starts to be promoted, and can directly unload back a part of oil under conditions of meeting engine components lubrication
Fuel tank, reduces the outlet pressure of lubricating oil, to effectively reduce the power loss of engine, oil outlet pressure becomes with revolving speed
Change second segment in curve corresponding diagram 6.In the further operational process of engine, revolving speed is further increased, and outlet pressure is further
It is promoted, sliding valve core 13 is further pushed to left end, primary pump and two stage pump are simultaneously to oil transportation confession oil at this time, in engine
During running at high speed, when needing the environment of high pressure oil, it can be good at providing extreme pressure lubricant.Its oil outlet pressure is with revolving speed
Third section in change curve corresponding diagram 6.It is further speeded up in engine speed, outlet pressure further increases, at this point, slide-valve
While spool 13 is pushed to close to left end, primary pump and two stage pump to oil transportation confession oil, the circuit of oil return box is connected smaller
Opening, a part of oil liquid flows to oil outlet, and another part oil liquid then flows back to fuel tank, maintains oil outlet pressure to stablize, is starting
Machine reaches when running at high speed, and is flowed back by the off-load of a part of oil liquid, limits the maximum pressure of oil outlet, to lubricate meeting
Under conditions of demand, engine power loss is reduced.Its oil outlet pressure is with the 4th section in rotation speed change curve corresponding diagram 6, and
One relief valve 11 and the second relief valve 12 are then respectively level-one oil pocket 9, second level oil pocket 10 during the entire process of engine operates
Oil pressure off-load protection is carried out, prevents oil pressure cavity pressure excessive and engine operating is damaged.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of change discharge capacity inner-rotor-type lubricating oil pump, including machine oil pump case (1), it is characterised in that: the one of the machine oil pump case (1)
Side is rotatably connected to drive shaft (2), and the drive shaft (2) is connected with internal rotor (3) close to the one end of machine oil pump case (1), described
Internal rotor (3) is rotated coaxially with drive shaft (2), is provided with outer rotor corresponding with internal rotor (3) on the outside of the internal rotor (3)
(4), the outer rotor (4) and internal rotor (3) eccentric setting and intermeshing, the one of the outer rotor (4) separate drive shaft (2)
Side is fixedly installed lubricating oil pump end cap (5), and the lubricating oil pump end cap (5) is fixedly connected by screw (6) with machine oil pump case (1),
The following distance for being internally located at internal rotor (3) of the machine oil pump case (1) offers oil sucting cavity (7), the machine oil pump case
(1) the side for being internally located at internal rotor (3) and top offers level-one oil pocket (8) corresponding with oil sucting cavity (7) and two respectively
Grade oil pocket (9), being internally located at of the machine oil pump case (1) level-one oil pocket (8) are fixedly installed the far from the one end of internal rotor (3)
Be internally located at second level oil pocket (9) of one relief valve (10), the machine oil pump case (1) are fixedly installed far from the one end of internal rotor (3)
Have the second relief valve (11), the machine oil pump case (1) be internally located at level-one oil pocket (8) and the top of second level oil pocket (9) is certain
Distance is fixedly installed slide-valve (12), and the slide-valve (12) is internally provided with sliding valve core (13), the sliding valve core
(13) it is coaxially disposed and is slidably connected with slide-valve (12), the side for being internally located at sliding valve core (13) of the slide-valve (12)
It is provided with slide-valve preloading spring (14), the side of the machine oil pump case (1) is located at slide-valve preloading spring (14) far from sliding
One end of spool (13) is provided with slide-valve nut (15), and the slide-valve (12) opens up far from the one end of slide-valve nut (15)
Have slide-valve oil outlet (16), the slide-valve (12) offers slide-valve unloading port close to the one end of slide-valve nut (15)
(17), the middle part side of the oil sucting cavity (8) and slide-valve (12) offers the first oil duct (18), the second level oil pocket (9) with
It offers between slide-valve oil outlet (16) the second oil duct (19), is opened up in the middle part of the second level oil pocket (9) and slide-valve (12)
There are third oil duct (20).
2. a kind of change discharge capacity inner-rotor-type lubricating oil pump according to claim 1, it is characterised in that: first relief valve
It (10) include the first pressure release valve casing (21), the first pressure release valve casing (21) is internally provided with the first relief valve core (22),
First relief valve core (22) is coaxially disposed and is slidably connected with the first pressure release valve casing (21), the first pressure release valve casing
(21) one end for being internally located at the first relief valve core (22) is provided with the first relief valve preloading spring (23), and described first lets out
Pressure valve preloading spring (23) is fixedly installed the first relief valve nut (24) far from the one end of the first relief valve core (22), described
The outer wall of first pressure release valve casing (21) offers the first relief valve oil inlet (25) far from one end of the first relief valve nut (24),
The side of the outer wall of the first pressure release valve casing (21) is located at the first relief valve core (22) far from the first relief valve preloading spring
(23) one end offers the first relief valve oil outlet (26).
3. a kind of change discharge capacity inner-rotor-type lubricating oil pump according to claim 1, it is characterised in that: the level-one oil pocket (8)
Pumping cavity is formed with second level oil pocket (9), the oil sucting cavity (7), level-one oil pocket (8) and second level oil pocket (9) volume are equal.
4. a kind of change discharge capacity inner-rotor-type lubricating oil pump according to claim 2, it is characterised in that: first relief valve
(10) side that outer wall is located at the first relief valve oil outlet (26) is provided with the first relief valve control terminal (27).
5. a kind of change discharge capacity inner-rotor-type lubricating oil pump according to claim 1, it is characterised in that: the slide-valve (12) is leaned on
The side of close slide-valve unloading port (17), which is opened up, to be connected there are two unloading port with slide-valve unloading port (17).
6. a kind of change discharge capacity inner-rotor-type lubricating oil pump according to claim 1, it is characterised in that: the sliding valve core (13)
For three stage structure.
7. a kind of change discharge capacity inner-rotor-type lubricating oil pump according to claim 1, it is characterised in that: the second level oil pocket (9)
One end far from internal rotor (3) is fixedly installed the second relief valve (11), and second relief valve (11) possesses and the first pressure release
The similar internal structure of valve (10).
8. a kind of change discharge capacity inner-rotor-type lubricating oil pump according to claim 1, it is characterised in that: first gate gurgle valve
(10), one end of the second relief valve (11) and slide-valve (12) is connected through a screw thread with oil pump body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811625086.1A CN109469528A (en) | 2018-12-28 | 2018-12-28 | A kind of change discharge capacity inner-rotor-type lubricating oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811625086.1A CN109469528A (en) | 2018-12-28 | 2018-12-28 | A kind of change discharge capacity inner-rotor-type lubricating oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109469528A true CN109469528A (en) | 2019-03-15 |
Family
ID=65678129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811625086.1A Pending CN109469528A (en) | 2018-12-28 | 2018-12-28 | A kind of change discharge capacity inner-rotor-type lubricating oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109469528A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0845080B1 (en) * | 1995-08-14 | 2000-11-22 | Stackpole Limited | Outlet pressure control for internal gear pump |
| JP2003328959A (en) * | 2003-06-13 | 2003-11-19 | Hitachi Unisia Automotive Ltd | Oil pump |
| EP1529958A2 (en) * | 2003-11-06 | 2005-05-11 | Aisin Seiki Kabushiki Kaisha | Oil supply system for an IC engine |
| CN103939173A (en) * | 2014-04-14 | 2014-07-23 | 奇瑞汽车股份有限公司 | Oil pump for engine |
| CN105864620A (en) * | 2016-05-18 | 2016-08-17 | 宁波圣龙汽车动力系统股份有限公司 | Three-section variable-displacement oil pump |
-
2018
- 2018-12-28 CN CN201811625086.1A patent/CN109469528A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0845080B1 (en) * | 1995-08-14 | 2000-11-22 | Stackpole Limited | Outlet pressure control for internal gear pump |
| JP2003328959A (en) * | 2003-06-13 | 2003-11-19 | Hitachi Unisia Automotive Ltd | Oil pump |
| EP1529958A2 (en) * | 2003-11-06 | 2005-05-11 | Aisin Seiki Kabushiki Kaisha | Oil supply system for an IC engine |
| CN103939173A (en) * | 2014-04-14 | 2014-07-23 | 奇瑞汽车股份有限公司 | Oil pump for engine |
| CN105864620A (en) * | 2016-05-18 | 2016-08-17 | 宁波圣龙汽车动力系统股份有限公司 | Three-section variable-displacement oil pump |
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Application publication date: 20190315 |