CN201059233Y - Injector fuel oil returning structure - Google Patents
Injector fuel oil returning structure Download PDFInfo
- Publication number
- CN201059233Y CN201059233Y CNU2007200244105U CN200720024410U CN201059233Y CN 201059233 Y CN201059233 Y CN 201059233Y CN U2007200244105 U CNU2007200244105 U CN U2007200244105U CN 200720024410 U CN200720024410 U CN 200720024410U CN 201059233 Y CN201059233 Y CN 201059233Y
- Authority
- CN
- China
- Prior art keywords
- oil
- cylinder head
- injector
- head body
- fuel
- 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 - Lifetime
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The utility model discloses a fuel-injector fuel oil-return structure which comprises a cylinder cover body, wherein, a fuel-injector hole is arranged inside the cylinder cover body; a drainback passage communicated with the fuel-injector hole is arranged inside the cylinder cover body; an oil outlet of the oil return channel is arranged on the side face of the cylinder cover body; an oil return pipe is arranged on the oil outlet. Because an oil return pipe on the fuel-injector body is removed, the fuel injector can be arranged inside the cylinder cover body, thereby the utility model has the advantages of avoidance of sealing problem caused by the fuel injector extending out of the cylinder cover body, improvement of leakproofness in a cylinder cover, and simplification of the structural design of the fuel injector for no oil return joint is needed to be designed for the fuel injector.
Description
Technical field
The utility model relates to technical field of engines, relates in particular to a kind of oil sprayer return flow oil structure.
Background technique
At present; the return flow oil of most of engine fuel injectors is by directly being connected the return tube oil return on the oil injector body; this just requires oil sprayer design back leakage connection, has increased the complexity of oil sprayer design, on the other hand; must stretch out valve mechanism cover when mounted at oil sprayer; there is sealing problem between valve mechanism cover and the oil sprayer, seal ring sealing commonly used at present, but in engine working process; because the vibration sealing part usually can produce oil impregnate, or the seal ring generation leakage of oil that comes off.
The model utility content
Technical problem to be solved in the utility model provides a kind of good airproof performance, and is simple in structure, the oil sprayer return flow oil structure that compactedness is good.
For solving the problems of the technologies described above, the technical solution of the utility model is: oil sprayer return flow oil structure, comprise the cylinder head body, be provided with oil injector hole in the described cylinder head body, be provided with the drainback passage that is communicated with described oil injector hole in the described cylinder head body, the oil outlet of described drainback passage is arranged on the side of described cylinder head body, and described oil outlet place is equipped with return tube.
As a kind of improvement, described drainback passage comprises the oil sprayer connecter hole that is communicated with described oil injector hole, and the oil return bypass passageways that is communicated with described oil sprayer connecter hole, and the oil outlet of described oil return bypass passageways is arranged on the side of described cylinder head body.
Owing to adopted technique scheme, oil sprayer return flow oil structure, comprise the cylinder head body, be provided with oil injector hole in the described cylinder head body, be provided with the drainback passage that is communicated with described oil injector hole in the described cylinder head body, the oil outlet of described drainback passage is arranged on the side of described cylinder head body, and described oil outlet place is equipped with return tube; Because cancelled the return tube on the oil injector body, oil sprayer can be installed to the cylinder head body interior, avoided stretching out the sealing problem that the cylinder head body causes because of oil sprayer, improved the sealing in the valve mechanism cover, and oil sprayer need not design back leakage connection, simplified the structural design of oil sprayer.
Description of drawings
Accompanying drawing is the utility model embodiment's a structural representation.
Embodiment
As shown in the figure, oil sprayer return flow oil structure, comprise cylinder head body 1, be provided with oil injector hole 2 in the described cylinder head body 1, be provided with the drainback passage that is communicated with described oil injector hole 2 in the described cylinder head body 1, the oil outlet of described drainback passage is arranged on the side of described cylinder head body 1, and described oil outlet place is equipped with return tube 3.Described drainback passage comprises the oil sprayer connecter hole 5 that is communicated with described oil injector hole 2, and the oil return bypass passageways 4 that is communicated with described oil sprayer connecter hole 5, and the oil outlet of described oil return bypass passageways 4 is arranged on the side of described cylinder head body 1.Described return tube 3 passed through whelk nail 6 and was connected with described cylinder head body 1.
Embodiment one: fluid is in oil injector hole 2 is arrived in the oil sprayer oil return, because the gasket circle that oil injector hole 2 places are provided with, the oil return of oil sprayer is sealed in the oil injector hole 2, the fluid oil return directly enters drainback passage, and the oil outlet of drainback passage is arranged on the side of described cylinder head body 1, make structure compact more like this, good airproof performance, fluid is through whelk nail 6, oil return bypass passageways 4 through being communicated with described oil sprayer connecter hole 5 enters return tube 3 and flows into Injection Pump then, simplify the structural design of oil sprayer like this, saved cost;
Embodiment two: fluid is in oil injector hole 2 is arrived in the oil sprayer oil return, because the gasket circle that oil injector hole 2 places are provided with, the oil return of oil sprayer is sealed in the oil injector hole 2, and oil return enters in the oil sprayer connecter hole 5, and there is seal ring at 5 places in the oil sprayer connecter hole, fluid enters drainback passage, fluid process whelk nail 6, the oil return bypass passageways 4 that is communicated with described oil sprayer connecter hole 5 enter return tube 3 by crossing whelk nail 6 then, get back to Injection Pump, compact structure, and improved sealing.
The utility model is relatively simple for structure, and oil sprayer is installed to the cylinder head body interior, has avoided because of oil sprayer stretches out the sealing problem that the cylinder head body causes, has improved the sealing in the valve mechanism cover.
Claims (3)
1. oil sprayer return flow oil structure, comprise cylinder head body (1), be provided with oil injector hole (2) in the described cylinder head body (1), it is characterized in that: be provided with the drainback passage that is communicated with described oil injector hole (2) in the described cylinder head body (1), the oil outlet of described drainback passage is arranged on the side of described cylinder head body (1), and described oil outlet place is equipped with return tube (3).
2. oil sprayer return flow oil structure as claimed in claim 1, it is characterized in that: described drainback passage comprises the oil sprayer connecter hole (5) that is communicated with described oil injector hole (2), and the oil return bypass passageways (4) that is communicated with described oil sprayer connecter hole (5), the oil outlet of described oil return bypass passageways (4) is arranged on the side of described cylinder head body (1).
3. oil sprayer return flow oil structure as claimed in claim 1 or 2 is characterized in that: described return tube (3) passed through whelk nail (6) and was connected with described cylinder head body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200244105U CN201059233Y (en) | 2007-06-25 | 2007-06-25 | Injector fuel oil returning structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200244105U CN201059233Y (en) | 2007-06-25 | 2007-06-25 | Injector fuel oil returning structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201059233Y true CN201059233Y (en) | 2008-05-14 |
Family
ID=39407702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200244105U Expired - Lifetime CN201059233Y (en) | 2007-06-25 | 2007-06-25 | Injector fuel oil returning structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201059233Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334858A (en) * | 2013-07-31 | 2013-10-02 | 山东鑫亚工业股份有限公司 | Embedded oil inlet-return injector assembly of diesel engine cylinder cover |
| CN103352783A (en) * | 2013-07-31 | 2013-10-16 | 山东鑫亚工业股份有限公司 | Oil injector oil-return device matched with diesel engine |
-
2007
- 2007-06-25 CN CNU2007200244105U patent/CN201059233Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334858A (en) * | 2013-07-31 | 2013-10-02 | 山东鑫亚工业股份有限公司 | Embedded oil inlet-return injector assembly of diesel engine cylinder cover |
| CN103352783A (en) * | 2013-07-31 | 2013-10-16 | 山东鑫亚工业股份有限公司 | Oil injector oil-return device matched with diesel engine |
| CN103352783B (en) * | 2013-07-31 | 2016-09-21 | 山东科林动力科技有限公司 | A kind of matched with diesel engine oil return of oil injector device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080514 |