CN201354672Y - Cooling oil circuit structure of engine piston - Google Patents
Cooling oil circuit structure of engine piston Download PDFInfo
- Publication number
- CN201354672Y CN201354672Y CNU2009203007312U CN200920300731U CN201354672Y CN 201354672 Y CN201354672 Y CN 201354672Y CN U2009203007312 U CNU2009203007312 U CN U2009203007312U CN 200920300731 U CN200920300731 U CN 200920300731U CN 201354672 Y CN201354672 Y CN 201354672Y
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- CN
- China
- Prior art keywords
- oil
- piston
- oil passage
- oil duct
- branch
- 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
Links
- 238000001816 cooling Methods 0.000 title abstract description 12
- 239000003921 oil Substances 0.000 claims abstract description 136
- 239000010721 machine oil Substances 0.000 claims abstract description 26
- 230000007704 transition Effects 0.000 claims abstract description 21
- 238000005507 spraying Methods 0.000 claims abstract description 20
- 239000007921 spray Substances 0.000 claims description 15
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- IXSZQYVWNJNRAL-UHFFFAOYSA-N etoxazole Chemical group CCOC1=CC(C(C)(C)C)=CC=C1C1N=C(C=2C(=CC=CC=2F)F)OC1 IXSZQYVWNJNRAL-UHFFFAOYSA-N 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- Lubrication Of Internal Combustion Engines (AREA)
Abstract
A cooling oil circuit structure of an engine piston comprises a main oil passage, a branch oil passage, a transition oil passage and a spraying oil passage which are arranged on a right crankcase body. The main oil passage is communicated with an oil pump; the transition oil passage is communicated with the main oil passage; the transition oil passage, the branch oil passage and the spraying oil passage are connected in sequence; the spraying oil passage extends from the tail end of the branch oil passage slantwise and points to the piston; the spraying oil passage adopts a slender oil passage and is used for spraying machine oil to the piston; when the piston runs to the area near the top dead center, machine oil sprayed from the spraying oil passage can reach the top part of the inner wall of the piston; and the centre lines of the spraying oil passage and a crank shaft form an included angle ranging from 59 degrees to 65 degrees. By adopting the utility model, the maximum-temperature area can be cooled effectively when the piston runs to the area near the top dead center; and the utility model has the advantages of simple structure and can be implemented and applied to various engines.
Description
Technical field
The utility model belongs to technical field of engines, specifically, relates to the especially cold oil line structure of piston of motorcycle engine component.
Background technique
The optional type of cooling of the general employing of engine piston, the machine oil that splashes when promptly relying on connecting rod to rotatablely move cools off and lubricates piston.Because be in the to-and-fro motion at a high speed during pistons work, piston head directly constitutes the part of firing chamber, the high temperature, the high pressure that produce during engine combustion directly act on piston head, so the temperature of piston head is the highest.Yet the machine oil that splashes but is difficult to arrive piston crown and top, and is especially when piston moves to the top dead center near zone, all the more so.If motor is worked under high load for a long time and piston again less than good cooling, will cause the poor heat stability of piston, surface abrasion is accelerated, the working life of having reduced piston.
In recent years, existing people begins to come cooling piston by the mode of setting up piston positive cold oil line structure on the engine right crankcase body.
As being CN201031721 at notification number, the day for announcing is on March 5th, 2008, name is called in the Chinese utility model patent (to call the A patent in the following text) of " the motorcycle engine right case lubricates the oil circuit with cooling piston ", a kind of oil circuit branch that communicates with main oil gallery that sets up on right case has been proposed, draw an oil pipe by this oil circuit branch again, oil pipe one end stretches into the technological scheme in the piston, sprays piston head from the machine oil of oil pipe ejection piston is forced cooling.
Be CN2769539 and for example at notification number, the day for announcing is on April 5th, 2006, name is called in the Chinese utility model patent (to call the B patent in the following text) of " a kind of structure of motorcycle engine piston being carried out the oil injection cooling ", then be on right crankcase, to be provided with a hole, this hole communicates by the former lubricating oil path of oil pipe and motor, and machine oil arrives the piston head back side from the ejection of above-mentioned hole.
Because the engine interior structure is very compact, therefore the layout of oil pipe is in fact very complicated and be difficult to carry out in the A patent, guaranteeing under the prerequisite that oil pipe does not interfere with crank, the mounting point and the bearing of trend of oil pipe are restricted, when piston ran to the top dead center near zone, the machine oil that oil pipe ejects was difficult to arrive the inwall top of piston.The B patent then is to arrange the connection oil pipe outside casing, there is baroque problem equally, in order to connect oil pipe, the position in the hole of formation bleed off circuit is nearer from the lower end of cylinder liner on the right crankcase, because angle limits, when piston ran to the top dead center near zone, the machine oil that comes out from above-mentioned hole was difficult to be ejected into the piston inner wall top equally.As seen, the technological scheme of above-mentioned A patent and B patent cooling effect to piston in practice is very limited, does not therefore obtain the approval and the promotion and implementation of industry.
The model utility content
The purpose of this utility model provides and a kind ofly can realize reliable cooling to the piston inner wall top when piston moves to the top dead center near zone, and simple in structure, the engine piston cold oil line structure that is easy to realize.
The purpose of this utility model is to realize by such technological scheme, it comprise on motorcycle engine and the right crankcase main oil gallery and in order to spray branch's oil duct of machine oil to piston, on right crankcase, also be provided with a transition oil duct that main oil gallery is connected with the branch oil duct, the end of branch's oil duct has an oblique extension and points to the elongated injection oil duct of piston, when piston moves to the top dead center near zone, can arrive the inwall top of piston from spraying machine oil that oil duct ejects.
Because branch's oil duct and main oil gallery are to be communicated with by the transition oil duct that is set directly on the right crankcase; and machine oil is directly to spray from the terminal oblique extended elongated injection oil duct of branch's oil duct; therefore need be do not set up oil pipe in the external or right crankcase at right crankcase; simple in structure; do not worry the arrangement space problem of oil pipe; do not worry the interference problem between oil pipe and the crank yet; after having added the transition oil duct; the position of branch's oil duct can be from the cylinder liner lower end slightly a little further; so not only be convenient to rationally determine the angle of inclination of injection oil duct; also can do it thinly length a bit with spraying oil duct; the machine oil process just has enough pressure when spraying oil duct; thereby when guaranteeing that piston moves to the top dead center near zone, can arrive the inwall top of piston from spraying machine oil that oil duct ejects.
Owing to adopted technique scheme, the utlity model has following advantage: the highest temperature zone in the time of realizing that piston run to the top dead center near zone is effectively cooled off, and is simple in structure, facts have proved, is easy on any motor enforcement and uses.
Description of drawings
Description of drawings of the present utility model is as follows:
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the position view of spout on right crankcase 1 that sprays oil duct 5;
Among the figure: 1. right crankcase; 2. main oil gallery; 3. branch's oil duct; 4. transition oil duct; 5. injection oil duct; 6. first plug; 7. second plug; 8. cylinder liner; 9. bent axle; 10. piston.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
As depicted in figs. 1 and 2, engine piston cold oil line structure provided by the utility model is by all being arranged on main oil gallery 2, branch's oil duct 3, the transition oil duct 4 on the right crankcase 1 and spraying oil duct 5 and form.Main oil gallery 2 communicates with oil pump, and transition oil duct 4 is communicated in main oil gallery 2.Transition oil duct 4, branch's oil duct 3 and spray oil duct 5 and link to each other successively, injection oil duct 5 extends and points to piston from branch's oil duct 3 terminal oblique.Spraying oil duct 5 is elongated oil duct, in order to spray machine oil to piston 10.When piston moves to the top dead center near zone, can arrive the inwall top of piston 10 from spraying machine oil that oil duct 5 ejects.
Because branch's oil duct 3 and main oil gallery 2 are to be communicated with by the transition oil duct 4 that is set directly on the right crankcase 1; and machine oil is directly to spray from branch's oil duct 3 terminal oblique extended elongated injection oil ducts 5; therefore need outside right crankcase 1 or in the right crankcase 1, not set up oil pipe; simple in structure; do not worry the arrangement space problem of oil pipe; do not worry the interference problem between oil pipe and the crank yet; after having added transition oil duct 4; the position of branch's oil duct 3 can be from cylinder liner 8 lower ends slightly a little further; so not only be convenient to rationally determine the angle of inclination of injection oil duct 5; also can do it thinly length a bit with spraying oil duct 5; the machine oil process just has enough pressure when spraying oil duct 5; thereby when guaranteeing that piston 10 moves to the top dead center near zone, can arrive the inwall top of piston 10 from spraying machine oil that oil duct 5 ejects.
During work, the machine oil in the engine sump is pumped into main oil gallery 2 after the oil pump pressurization, enters from transition oil duct 4, branch's oil duct 3 successively then and sprays oil duct 5, from spraying the spout ejection of oil duct 5.When piston 10 is positioned at the lower dead center near zone, can be mapped to piston 10 outer walls from the machine oil that sprays oil duct 5 ejections piston 10 is cooled off and lubricates; When piston 10 when lower dead center is to the top dead center running, can be mapped to piston 10 madial walls from the machine oil that sprays oil duct 5 ejections and cool off; When piston 10 runs to the top dead center near zone, can be mapped to the highest temperature zone at piston 10 inwall tops from the machine oil that sprays oil duct 5 ejections, make piston 10 obtain good cooling and lubricated, the working environment of piston 10 improves greatly always, and be improved working life.
As can be seen from Figure 2, the center line and the angle theta between bent axle 9 center lines of injection oil duct 5 are 62 ° ± 3 °.Spraying under the definite prerequisite of oil duct 5 nozzle exit areas, angle is too small, and machine oil can be blocked by crank and can not spray in the piston; If angle is excessive, machine oil then sprays the inwall top less than piston 10 when piston 10 moves to the top dead center near zone.
As shown in Figure 2, the center line of transition oil duct 4 is perpendicular to the plane at main oil gallery 2 center line places, branch's oil duct 3 center lines are perpendicular to transition oil duct 4 center lines, be convenient to processing like this, the external port of processing back transition oil duct 4, branch's oil duct 3 is carried out shutoff with first plug 6 and second plug 7 respectively, makes main oil gallery 2, branch's oil duct 3, transition oil duct 4 and spray oil duct 5 to form a continuous oil circuit.
Practice shows, adopts technical solutions of the utility model, and preparation process is simple, the cooling effect in piston highest temperature zone is obvious, makes piston remain under the normal temperature and works, and has prolonged the working life of piston, improve the stability of motor, be highly susceptible to promotion and implementation on motor.
Claims (4)
1. engine piston cold oil line structure, comprise on motor and the right crankcase (1) main oil gallery (2) and in order to spray branch's oil duct (3) of machine oil to piston, it is characterized in that: on right crankcase (1), also be provided with a transition oil duct (4) that main oil gallery (2) is connected with branch's oil duct (3), the end of branch's oil duct (3) has an oblique extension and points to the elongated injection oil duct (5) of piston, when piston moves to the top dead center near zone, can arrive the inwall top of piston from spraying machine oil that oil duct (5) ejects.
2. engine piston cold oil line structure according to claim 1 is characterized in that: be 62 ° ± 3 ° angle between the center line of described injection oil duct (5) and the crankshaft axis.
3. engine piston cold oil line structure according to claim 1 and 2, it is characterized in that: the center line of described transition oil duct (4) is perpendicular to the plane at main oil gallery (2) center line place, and branch's oil duct (3) center line is perpendicular to transition oil duct (4) center line.
4. engine piston cold oil line structure according to claim 3 is characterized in that: the external port of transition oil duct (4), branch's oil duct (3) uses first plug (6) and second plug (7) to carry out shutoff respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009203007312U CN201354672Y (en) | 2009-02-20 | 2009-02-20 | Cooling oil circuit structure of engine piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009203007312U CN201354672Y (en) | 2009-02-20 | 2009-02-20 | Cooling oil circuit structure of engine piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201354672Y true CN201354672Y (en) | 2009-12-02 |
Family
ID=41411013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009203007312U Expired - Fee Related CN201354672Y (en) | 2009-02-20 | 2009-02-20 | Cooling oil circuit structure of engine piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201354672Y (en) |
-
2009
- 2009-02-20 CN CNU2009203007312U patent/CN201354672Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091202 Termination date: 20100220 |