CN106121853B - A kind of piston of automobile engine oil return hole arragement construction - Google Patents
A kind of piston of automobile engine oil return hole arragement construction Download PDFInfo
- Publication number
- CN106121853B CN106121853B CN201610779472.0A CN201610779472A CN106121853B CN 106121853 B CN106121853 B CN 106121853B CN 201610779472 A CN201610779472 A CN 201610779472A CN 106121853 B CN106121853 B CN 106121853B
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- Prior art keywords
- oil return
- return hole
- auxiliary
- piston
- oil
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
Abstract
The present invention relates to a kind of piston of automobile engine oil return hole arragement constructions, including eight third piston ring groove oil return holes being located in the third piston ring groove of piston；It further include the first auxiliary oil return hole being located in the second-ring groove of piston and the second auxiliary oil return hole；The first auxiliary oil return hole and the second auxiliary oil return hole are made of a flat segments and coupled vertical section respectively, and the outlet of two vertical sections is communicated with the upper side wall of piston pin hole respectively；The first auxiliary oil return hole and the second auxiliary oil return hole arrange and that symmetrically machine oil in second-ring groove flows to vertical section discharge from the flat segments of the first auxiliary oil return hole and the second auxiliary oil return hole along piston radial.The present invention can make piston pin obtain good lubrication and cooling, when drain machine oil in the second annular groove, reduce machine oil and fall participating in burning in suction cylinder, avoid the occurrence of the excessive operating condition of negative pressure in cylinder, reduce machine oil loss and improve engine emission.
Description
Technical field
The present invention relates to piston of automobile engine, and in particular to a kind of piston of automobile engine oil return hole arragement construction.
Background technique
Usual engine piston is equipped with three piston rings.The twice piston ring of top land is compression ring, is called compression ring,
Its effect is sealing cylinder, prevents cylinder leakage tester, it is exactly that the heat that top land is transmitted passes to gas there are one effect
Cylinder sleeve takes away heat by cooling water.That above piston pin hole is called oil ring together, its effect is a small amount of machine oil profit of storage
Sliding cylinder jacket, and extra machine oil is scraped off, and be back to oil sump in time.Referring to Fig. 1 and Fig. 2, existing engine piston returns
Oilhole is all arranged on third annular groove 9；The technological forming that piston oil return hole is added using casting, machine or the two has concurrently simultaneously,
Third road piston ring（Oil ring）In third annular groove 9, when third road piston ring is moved downward along casing wall, in third annular groove
Machine oil flows back into oil sump along eight third piston ring groove oil return holes.But the second annular groove 10 is led due to being not provided with oil return hole
It causes that oil sump cannot be back to along the machine oil that casing wall scrapes with the second piston ring of the second annular groove 10 cooperation.Therefore, when starting
When machine operates in the excessive operating condition of negative pressure in cylinder, when such as idling, intake stroke, the machine oil in the second annular groove can be by the internal reference of falling suction cylinder
With burning, causes the machine oil of engine to be lost and increase.Since a large amount of CH compound and particulate matter can be generated after machine oil burning, because
This, increases the discharge amount of engine harmful substance CH and PM2.5, and engine emission is made to tend to exacerbate while deterioration to big
The pollution of gas.Currently, solving the problems, such as that machine oil falls in suction cylinder, the method generallyd use is to increase piston ring elastic force, to increase
The sealing effect of second annular groove.But piston ring elastic force increases, frictional force also increases with it, directly results in engine in this way and rub
Mistake of wearing increases, and violates engine design philosophy.Therefore, it is necessary to seek other solution.CN 202370689U is disclosed
" a kind of diesel engine piston skirt section oil return hole layout structure ", the piston skirt of tough lower section is equipped with cyclic annular oil pocket under oil piston ring,
Oil return hole is newly increased on the lower section of former oil return hole, processing oil ring, so that the lubricating oil in oil pocket area is flow back into oil sump rapidly, avoids
Higher-pressure region is formed in oil pocket region, mitigates the phenomenon that lubricating oil " above altering " participates in burning, and reaching reduces diesel engine lubricating oil consumption
The purpose of rate.Undoubtedly, this is a kind of good try of technical field.In view of the second annular groove be located at the first annular groove and
Between third annular groove, space is limited, oil return hole cannot be arranged as third annular groove, so, the machine oil in the second annular groove can quilt
It participates in not being resolved for a long time the problem of burning in suction cylinder.
Summary of the invention
The object of the present invention is to provide a kind of piston of automobile engine oil return hole arragement constructions, piston pin can be made to obtain
Good lubrication and cooling, when drain machine oil in the second annular groove, reduce machine oil and fall participating in burning in suction cylinder, avoid the occurrence of cylinder
The interior excessive operating condition of negative pressure reduces machine oil loss and improves engine emission.
A kind of piston of automobile engine oil return hole arragement construction of the present invention, the third piston ring including being located at piston
Eight third piston ring groove oil return holes in slot；Further include be located in the second-ring groove of piston first auxiliary oil return hole and
Second auxiliary oil return hole；The first auxiliary oil return hole and the second auxiliary oil return hole are respectively by flat segments and coupled perpendicular
Straight section is constituted, and the outlet of two vertical sections is communicated with the upper side wall of piston pin hole respectively；The first auxiliary oil return hole and second auxiliary
Help oil return hole along piston radial arrangement and symmetrically, machine oil in second-ring groove is from the first auxiliary oil return hole and the
The flat segments of two auxiliary oil return holes flow to vertical section discharge.
It further, further include the first auxiliary back oil road being respectively provided in piston pin hole lower wall and the second auxiliary oil return
Road, the first auxiliary back oil road and the second auxiliary back oil road assist oil return hole with the first auxiliary oil return hole and second respectively
It corresponds, and exports corresponding with oil sump.
Further, the diameter d1 phase of the flat segments and vertical section of the first auxiliary oil return hole and the second auxiliary oil return hole
Deng, it is described first auxiliary back oil road and second auxiliary back oil road diameter d2 it is equal, and d2 be greater than d1.
Further, the diameter d1 of the flat segments and vertical section of the first auxiliary oil return hole and the second auxiliary oil return hole is
The diameter d2 of 2mm, the first auxiliary back oil road and the second auxiliary back oil road is 2.5mm.
The present invention, which solves the machine oil in long-standing second annular groove, can be participated in the technology hardly possible of burning in suction cylinder
Topic, has effectively evaded the phenomenon that machine oil is inhaled into cylinder, reduces machine oil loss, improves engine emission, while also making
Piston pin obtains good lubrication and cooling.
Detailed description of the invention
Fig. 1 is existing piston oil return hole arrangement schematic diagram；
Fig. 2 is the A-A cross-sectional view of Fig. 1.
Fig. 3 is the oil return hole arrangement schematic diagram of invention；
Fig. 4 is the left view of Fig. 3；
Fig. 5 is the B-B cross-sectional view of Fig. 3；
Fig. 6 is the C-C cross-sectional view of Fig. 4.
In figure：1,2,3,4,5,6,7,8- third piston ring groove oil return hole, 9- third piston ring groove, 10- second piston
Annular groove, 11- first assist oil return hole, and 12- second assists oil return hole, and 13- first assists back oil road, 14- second to assist back
Oil duct.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing.
Referring to Fig. 3, Fig. 4, Fig. 5 and a kind of piston of automobile engine oil return hole arragement construction shown in fig. 6, including it is located at work
Eight third piston ring groove oil return holes 1,2,3,4,5,6,7,8 in the third piston ring groove 9 of plug, substantive distinguishing features outstanding
It is：It further include the first auxiliary oil return hole 11 being located in the second-ring groove 10 of piston and the second auxiliary oil return hole 12；It is described
First auxiliary oil return hole and the second auxiliary oil return hole are made of a flat segments and coupled vertical section respectively, two vertical sections
Outlet is communicated with the upper side wall of piston pin hole respectively；The first auxiliary oil return hole and the second auxiliary oil return hole are along piston radial cloth
It sets and symmetrically, the machine oil in second-ring groove 10 is straight from the first auxiliary oil return hole and the second auxiliary oil return hole
Section flows to vertical section discharge, to strengthen the lubrication to piston pin.
It further include the first auxiliary back oil road 13 being respectively provided in piston pin hole lower wall and the second auxiliary back oil road 14, institute
It states the first auxiliary back oil road and the second auxiliary back oil road assists oil return hole one by one with the first auxiliary oil return hole and second respectively
It is corresponding, and outlet is corresponding with oil sump, to guarantee that machine oil flows back into oil sump in time.
The diameter d1 of the flat segments and vertical section of the first auxiliary oil return hole 11 and the second auxiliary oil return hole 12 is equal, institute
The diameter d2 for stating the first auxiliary back oil road 13 and the second auxiliary back oil road 14 is equal, and d2 is greater than d1.
The diameter d1 of the flat segments and vertical section of the first auxiliary oil return hole 11 and the second auxiliary oil return hole 12 is 2mm
（Millimeter）, described first assists back oil road 13 and second to assist the diameter d2 of back oil road 14 for 2.5mm（Millimeter）.
Referring to Fig. 6 when second piston ring with piston moves downward when, scrape machine oil on casing wall and enter first and assist back
Oilhole 11 and the second auxiliary oil return hole 12, then from the first auxiliary back oil road 13 and the second auxiliary back oil road 14 and live in the direction of the arrow
Plug pin hole two sides are back to oil sump.
The present invention has evaded the phenomenon that machine oil is inhaled into cylinder, reduces machine oil loss, improves engine emission, simultaneously
Also piston pin is made to obtain good lubrication and cooling.
Claims (2)
1. a kind of piston of automobile engine oil return hole arragement construction, the third piston ring groove including being located at piston（9）In eight
Third piston ring groove oil return hole（1,2,3,4,5,6,7,8）, it is characterized in that：It further include the second-ring groove for being located at piston（10）
In first auxiliary oil return hole（11）With the second auxiliary oil return hole（12）；The first auxiliary oil return hole and the second auxiliary oil return hole
Be made of respectively a flat segments and coupled vertical section, two vertical sections outlet respectively with the upper side wall phase of piston pin hole
It is logical；The center line of the first auxiliary oil return hole and the second auxiliary oil return hole along piston radial arrangement and about piston motion direction
Symmetrically, second-ring groove（10）In machine oil from it is described first auxiliary oil return hole and second auxiliary oil return hole flat segments flow to
Vertical section discharge；
It further include the first auxiliary back oil road being respectively provided in piston pin hole lower wall（13）With the second auxiliary back oil road（14）, institute
It states the first auxiliary back oil road and the second auxiliary back oil road assists oil return hole one by one with the first auxiliary oil return hole and second respectively
It is corresponding, and export corresponding with oil sump；
The first auxiliary oil return hole（11）With the second auxiliary oil return hole（12）Flat segments and vertical section diameter d1 it is equal, institute
State the first auxiliary back oil road（13）With the second auxiliary back oil road（14）Diameter d2 it is equal, and d2 be greater than d1.
2. piston of automobile engine oil return hole arragement construction according to claim 1, it is characterized in that：Described first assists back
Oilhole（11）With the second auxiliary oil return hole（12）Flat segments and vertical section diameter d1 be 2mm, it is described first auxiliary back oil road
（13）With the second auxiliary back oil road（14）Diameter d2 be 2.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610779472.0A CN106121853B (en) | 2016-08-31 | 2016-08-31 | A kind of piston of automobile engine oil return hole arragement construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610779472.0A CN106121853B (en) | 2016-08-31 | 2016-08-31 | A kind of piston of automobile engine oil return hole arragement construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106121853A CN106121853A (en) | 2016-11-16 |
| CN106121853B true CN106121853B (en) | 2018-11-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610779472.0A Active CN106121853B (en) | 2016-08-31 | 2016-08-31 | A kind of piston of automobile engine oil return hole arragement construction |
Country Status (1)
| Country | Link |
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| CN (1) | CN106121853B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107178432A (en) * | 2017-07-11 | 2017-09-19 | 安徽江淮汽车集团股份有限公司 | Piston with piston pin lubrication system |
| CN111425313A (en) * | 2020-03-20 | 2020-07-17 | 唐为民 | Combined piston with variable compression ratio |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2106899U (en) * | 1991-09-17 | 1992-06-10 | 廖平山 | New model-495 diesel engine piston |
| JPH1037733A (en) * | 1996-07-24 | 1998-02-10 | Toyota Autom Loom Works Ltd | Connecting rod lubricating device |
| JP2002332912A (en) * | 2001-04-30 | 2002-11-22 | Honda Motor Co Ltd | Piston for internal combustion engine |
| JP2008144658A (en) * | 2006-12-08 | 2008-06-26 | Mazda Motor Corp | Piston structure for engine |
| JP2010223005A (en) * | 2009-03-19 | 2010-10-07 | Toyota Central R&D Labs Inc | Piston for internal combustion engine and internal combustion engine |
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2016
- 2016-08-31 CN CN201610779472.0A patent/CN106121853B/en active Active
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| CN106121853A (en) | 2016-11-16 |
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