CN101907033A - Engine piston - Google Patents
Engine piston Download PDFInfo
- Publication number
- CN101907033A CN101907033A CN2010102371474A CN201010237147A CN101907033A CN 101907033 A CN101907033 A CN 101907033A CN 2010102371474 A CN2010102371474 A CN 2010102371474A CN 201010237147 A CN201010237147 A CN 201010237147A CN 101907033 A CN101907033 A CN 101907033A
- Authority
- CN
- China
- Prior art keywords
- piston
- pin boss
- skirt
- engine
- present
- 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.)
- Pending
Links
Images
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention discloses an engine piston which comprises a piston head, a piston skirt and a piston pin boss, wherein the piston skirt and the piston pin boss are designed in a split mode, and a clearance is formed between the piston skirt and the piston pin boss. Since the piston skirt and the piston pin boss are split, the piston skirt, which bulges from heat, can not generate elliptic deformation under the influence of the piston pin boss and a peripheral notch, but can keep round all the time, thereby ensuring the clearance fit between the piston skirt and the cylinder cavity all the time, effectively preventing engine oil from leaking into the combustion chamber to cause insufficient combustion, and greatly reducing the discharge of hydrocarbons in the engine working process.
Description
Technical field
The present invention relates to a kind of engine piston.
Background technique
Existing engine piston mainly comprises piston head, piston skirt and three parts of piston pin boss, wherein piston skirt and piston pin boss fuse usually, piston skirt periphery and cylinder inner chamber coupling are fixed to piston thereby piston pin boss then is used for the cross-under wrist pin with crankshaft-link rod.Because the cylinder inner chamber is circle at present, so the piston skirt periphery also should be made the circle of mating with the cylinder inner chamber in theory, but during in fact because of engine operation, can at high temperature expand in the piston skirt, add the cause that one-piece piston key seat and piston pin boss front and back breach exists, profile generation ovalizing deflection after causing the piston skirt to be expanded, be difficult to Spielpassung such as realization with the cylinder inner chamber, its result who causes makes to cause machine oil in the cylinder burn incompletely in the firing chamber that usually bleeds engine hydrocarbon to discharge and exceed standard from piston skirt and cylinder inner wall gap.For preventing that above-mentioned phenomenon from taking place, an existing class way is that the piston skirt profile is made complicated oval taper in advance, and purpose is to expect that it can expand into circle, but in fact the inflated configuration of piston skirt can't be predicted.
Summary of the invention
The present invention seeks to: do not provide the thermal expansion of a kind of skirt section yielding but can be all the time and the engine piston of Spielpassung such as cylinder inner cavity.
Technological scheme of the present invention is: a kind of engine piston comprises piston head, piston skirt and piston pin boss; Described piston skirt and piston pin boss split design, separating between the two has the space.
The same between piston head described in the present invention and the piston skirt with routine techniques, can be one-body molded, also can install and fix.
The mode of installing and fixing of piston head and piston skirt is specially and is threaded fixingly among the present invention, and perhaps welding is fixing.
Can be one-body molded between piston head described in the present invention and the piston pin boss, also can install and fix.
The mode of installing and fixing of piston head and piston pin boss is specially by link and fixes among the present invention, and is perhaps fixing by being threaded, and perhaps welding is fixing.
The periphery of piston skirt described in the present invention equally is designed to circle with routine techniques, still is circular after its thermal expansion.
Equally be fixed with some piston rings with routine techniques on the periphery of piston head described in the present invention, and the piston skirt is meant the following part of piston ring of bottom.
This engine piston of the present invention is when concrete assembling, and the crankshaft-link rod of piston pin boss and motor is fixed by the wrist pin cross-under, and piston skirt and cylinder inner chamber coupling.
Advantage of the present invention is:
1. among the present invention because piston skirt and piston pin boss adopt the split design, can not be subjected to the influence of piston pin boss and perimeter gap thereof behind the expanded by heating of piston skirt and produce elliptical deformation, but can remain circle, thereby guarantee Spielpassung such as to realize all the time with cylinder inner cavity, preventing effectively that machine oil from bleeding causes burn incompletely in the firing chamber, reduces the hydrocarbon emission in the engine working process greatly.
Description of drawings
Below in conjunction with drawings and Examples the present invention is further described:
Fig. 1 is the assembly structure sectional view of a kind of specific embodiment of the present invention and crankshaft-link rod;
Fig. 2 is the assembly structure sectional view of second kind of specific embodiment of the present invention and crankshaft-link rod;
Fig. 3 is the assembly structure sectional view of the third specific embodiment of the present invention and crankshaft-link rod.
Wherein: 1, piston head; 2, piston skirt; 3, piston pin boss; 4, piston ring; 5, crankshaft-link rod; 6, wrist pin; 7, screw.
Embodiment
Embodiment 1: in conjunction with shown in Figure 1, this engine piston that present embodiment provides is made up of piston head 1, piston skirt 2, piston pin boss 3, piston ring 4, wrist pin 6 and screw 7.Described piston head 1 is one-body molded with piston skirt 2, and the top of piston pin boss 3 then and between the piston head 1 is fixed by two screws 7.2 peripheries of piston skirt described in the present embodiment rounded and with piston pin boss 3 splits designs, separating between itself and the piston pin boss 3 has the space.Equally form groove (quantity of groove is three roads in the present embodiment) with routine techniques on piston head 1 periphery described in the present embodiment simultaneously, setting-in is fixed with piston ring 4 in the groove, and described piston skirt 2 is meant the part of piston ring below 4 of bottom.This engine piston that present embodiment provides is when concrete assembling, and piston pin boss 3 is fixed by wrist pin 6 cross-under with the crankshaft-link rod 5 of motor, and piston skirt 2 and cylinder inner chamber coupling.
Present embodiment is because piston skirt 2 and piston pin boss 3 adopt the split design, can not be subjected to the influence of piston pin boss 3 and perimeter gap thereof behind 2 expanded by heating of piston skirt and produce elliptical deformation, but can remain circle, thereby guarantee Spielpassung such as to realize all the time with cylinder inner cavity, preventing effectively that machine oil from bleeding causes burn incompletely in the firing chamber, reduces the hydrocarbon emission in the engine working process greatly.
Embodiment 2: in conjunction with shown in Figure 2, this engine piston that present embodiment provides is made up of piston head 1, piston skirt 2, piston pin boss 3, piston ring 4 and wrist pin 6.Described piston head 1 is one-body molded with piston skirt 2, and is fixing by being threaded between 3 of piston pin bosses and the piston head 1.2 peripheries of piston skirt described in the present embodiment rounded and with piston pin boss 3 splits designs, separating between itself and the piston pin boss 3 has the space.Equally form groove (quantity of groove is three roads in the present embodiment) with routine techniques on piston head 1 periphery described in the present embodiment simultaneously, setting-in is fixed with piston ring 4 in the groove, and described piston skirt 2 is meant the part of piston ring below 4 of bottom.This engine piston that present embodiment provides is when concrete assembling, and piston pin boss 3 is fixed by wrist pin 6 cross-under with the crankshaft-link rod 5 of motor, and piston skirt 2 and cylinder inner chamber coupling.
Present embodiment is because piston skirt 2 and piston pin boss 3 adopt the split design, can not be subjected to the influence of piston pin boss 3 and perimeter gap thereof behind 2 expanded by heating of piston skirt and produce elliptical deformation, but can remain circle, thereby guarantee Spielpassung such as to realize all the time with cylinder inner cavity, preventing effectively that machine oil from bleeding causes burn incompletely in the firing chamber, reduces the hydrocarbon emission in the engine working process greatly.
Embodiment 3: in conjunction with shown in Figure 3, this engine piston that present embodiment provides is made up of piston head 1, piston skirt 2, piston pin boss 3, piston ring 4 and wrist pin 6.Described piston head 1 is one-body molded with piston pin boss 3, and is fixing by being threaded between 2 of piston skirts and the piston head 1.2 peripheries of piston skirt described in the present embodiment rounded and with piston pin boss 3 splits designs, separating between itself and the piston pin boss 3 has the space.Equally form groove (quantity of groove is three roads in the present embodiment) with routine techniques on piston head 1 periphery described in the present embodiment simultaneously, setting-in is fixed with piston ring 4 in the groove, and described piston skirt 2 just is positioned at piston ring 4 belows of bottom.This engine piston that present embodiment provides is when concrete assembling, and piston pin boss 3 is fixed by wrist pin 6 cross-under with the crankshaft-link rod 5 of motor, and piston skirt 2 and cylinder inner chamber coupling.
Present embodiment is because piston skirt 2 and piston pin boss 3 adopt the split design, can not be subjected to the influence of piston pin boss 3 and perimeter gap thereof behind 2 expanded by heating of piston skirt and produce elliptical deformation, but can remain circle, thereby guarantee Spielpassung such as to realize all the time with cylinder inner cavity, preventing effectively that machine oil from bleeding causes burn incompletely in the firing chamber, reduces the hydrocarbon emission in the engine working process greatly.
Certainly the foregoing description only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the people who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.The all spirit of main technical schemes is done according to the present invention equivalent transformation or modification all should be encompassed within protection scope of the present invention.
Claims (7)
1. an engine piston comprises piston head (1), piston skirt (2) and piston pin boss (3); It is characterized in that described piston skirt (2) and piston pin boss (3) split design, separating between the two has the space.
2. engine piston according to claim 1 is characterized in that described piston head (1) and piston skirt (2) are one-body molded, perhaps installs and fixes.
3. engine piston according to claim 2 is characterized in that described piston head (1) is fixing by being threaded with the mode that installs and fixes of piston skirt (2), and perhaps welding is fixing.
4. engine piston according to claim 1 is characterized in that described piston head (1) and piston pin boss (3) are one-body molded, perhaps installs and fixes.
5. engine piston according to claim 4, the mode that installs and fixes that it is characterized in that described piston head (1) and piston pin boss (3) is for to fix by link, and is perhaps fixing by being threaded, and perhaps welding is fixing.
6. according to claim 1 or 2 or 3 or 4 or 5 described engine pistons, it is characterized in that described piston skirt (2) periphery is for circular.
7. according to claim 1 or 2 or 3 or 4 or 5 described engine pistons, it is characterized in that being fixed with some piston rings (4) on described piston head (1) periphery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102371474A CN101907033A (en) | 2010-07-27 | 2010-07-27 | Engine piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102371474A CN101907033A (en) | 2010-07-27 | 2010-07-27 | Engine piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101907033A true CN101907033A (en) | 2010-12-08 |
Family
ID=43262586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102371474A Pending CN101907033A (en) | 2010-07-27 | 2010-07-27 | Engine piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101907033A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109184937A (en) * | 2018-11-13 | 2019-01-11 | 滨州渤海活塞有限公司 | Novel steel pistons |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85103889B (en) * | 1985-05-04 | 1987-10-21 | 铁道部大连内燃机车研究所 | Compound piston for two-stroke diesel engine |
| JP2008248842A (en) * | 2007-03-30 | 2008-10-16 | Mitsubishi Motors Corp | Piston for internal combustion engine |
| JP2009041680A (en) * | 2007-08-09 | 2009-02-26 | Nissan Motor Co Ltd | Swing link connection structure and swing link connecting method |
-
2010
- 2010-07-27 CN CN2010102371474A patent/CN101907033A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85103889B (en) * | 1985-05-04 | 1987-10-21 | 铁道部大连内燃机车研究所 | Compound piston for two-stroke diesel engine |
| JP2008248842A (en) * | 2007-03-30 | 2008-10-16 | Mitsubishi Motors Corp | Piston for internal combustion engine |
| JP2009041680A (en) * | 2007-08-09 | 2009-02-26 | Nissan Motor Co Ltd | Swing link connection structure and swing link connecting method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109184937A (en) * | 2018-11-13 | 2019-01-11 | 滨州渤海活塞有限公司 | Novel steel pistons |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203615366U (en) | Combustion chamber | |
| CN104454129A (en) | Arrangement comprising a cylinder head and a prechamber system | |
| JP2011503416A (en) | Engine pre-combustion chamber structure | |
| CN103608574A (en) | Cylinder liner and structural unit consisting of at least one cylinder liner and crankcase | |
| CN106795832A (en) | The cylinder jacket assembly of air-gap insulation | |
| RU2014129091A (en) | CYLINDER SHEET AND CYLINDER HEAD FOR INTERNAL COMBUSTION ENGINE | |
| KR102081463B1 (en) | Igniting device for igniting gas mixture of a gaseous fuel operated internal combustion engine | |
| CN101907033A (en) | Engine piston | |
| US9897319B2 (en) | Igniter position for a combustor of a gas turbine engine | |
| CN201786473U (en) | Engine piston | |
| US20170321623A1 (en) | Multistage throttling and expansion method for saving energy and reducing emissions of an engine | |
| JP6381053B2 (en) | Piston of internal combustion engine | |
| CN104302902B (en) | The piston of internal combustion engine | |
| CN204404243U (en) | A kind of gas-turbine combustion chamber location structure | |
| CN201730697U (en) | Labyrinth cylinder sealing structure | |
| CN201753673U (en) | Inverted-differential compressor piston used for ship | |
| CN205315112U (en) | Energy -conserving gasoline engine | |
| JP6574990B2 (en) | Piston with reduced topland height and closely topland piston shape | |
| KR20200117283A (en) | Engine structure | |
| CN104100402A (en) | Diesel engine cylinder jacket structure | |
| CN210686141U (en) | Engine and piston thereof | |
| JP6654917B2 (en) | piston | |
| CN202500671U (en) | Engine piston | |
| US20160245222A1 (en) | Piston with a piston ring groove, in particular a compression groove | |
| CN210799163U (en) | Motorcycle engine piston structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20101208 |