CN103807070A - Fuel injector installation structure for diesel engine cylinder head - Google Patents
Fuel injector installation structure for diesel engine cylinder head Download PDFInfo
- Publication number
- CN103807070A CN103807070A CN201210439572.0A CN201210439572A CN103807070A CN 103807070 A CN103807070 A CN 103807070A CN 201210439572 A CN201210439572 A CN 201210439572A CN 103807070 A CN103807070 A CN 103807070A
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- China
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- fuel injector
- copper bush
- cylinder head
- diesel engine
- oil sprayer
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a fuel injector installation structure for a diesel engine cylinder head. The fuel injector installation structure for the diesel engine cylinder head comprises a cylinder head body and a fuel injector copper bush installed in the cylinder head body in an inserting mode. A fuel injector copper bush installation hole is formed in the middle of the cylinder head body vertically, and the fuel injector copper bush is inserted into the fuel injector copper bush installation hole for forming an upper water jacket water cavity and a cylinder head bridge zone water cavity in an isolating mode. The fuel injector installation structure for the diesel engine cylinder head is simple and reasonable, the thin-wall fuel injector copper bush is used for installing a fuel injector, a fuel injector lug is not integrally cast with the cylinder head, so that the phenomenon that a wall with a large thickness is reserved and occupies the cylinder head bridge zone space is avoided, the sand core of the bridge zone is thick, the sintering phenomenon does not occur easily, and the casting quality of the cylinder head is improved. In addition, without the obstruction of the fuel injector lug, cleaning is detectable and convenient.
Description
Technical field
The present invention relates to diesel engine field, particularly a kind of cylinder cover for diesel engine oil sprayer mounting structure.
Background technique
The oil sprayer of existing diesel cylinder head (especially Four-valve cylinder head) is mounted in oil sprayer and installs in the mounting hole of oil sprayer of lug, it is to be cast directly on cylinder cap that oil sprayer is installed lug, coherent cylinder cap upper plate, lower shoe, mounting hole of oil sprayer need obtain by later stage machining.
This and cylinder head cast inblock oil sprayer is out installed lug, castability is poor, easily forms many loose holes, makes to process after mounting hole of oil sprayer, the diesel oil that sealing cooling liquid in cylinder head cooling chamber and oil sprayer return is easily by this loose hole seepage, and sealing is poor; Also increased the foundary loss rate of cylinder cap simultaneously.
In addition, this method casts out the oil sprayer installation lug coming need to leave thicker wall thickness (wall thickness more than minimum 4.5mm), thereby tie up the space of many cylinder cap ridge areas, make on the one hand ridge area cooling water channel due to narrow space cooling capacity deficiency, often there are the serious problems that cylinder cap splits.On the other hand, because the core of this cylinder cap ridge area of formation is thinner, sintering phenomenon easily occurs when casting, for layering water jacket, whether the core sintering of ridge area, in not detectable state, had a strong impact on the castability of cylinder cap.Also unusual difficulty of the simultaneously cleaning of core, cylinder cap exists extremely serious cylinder and splits hidden danger.In order to reduce the sintering phenomenon in bridge of the nose water cavity district, some designers just expand the core space of ridge area by cutting air flue, but have so just reduced the trafficability performance of air flue, have reduced the performance of motor.
Summary of the invention
The present invention is in order to overcome defect in above-mentioned prior art, provides a kind of simple and reasonable, can improve castability and the usability of cylinder cap, has reduced the cylinder cover for diesel engine oil sprayer mounting structure of foundary loss rate.
For achieving the above object, according to the invention provides a kind of cylinder cover for diesel engine oil sprayer mounting structure, comprising: cylinder cap body, and be inserted into the intrinsic copper bush of fuel injector of cylinder cap; The middle part of cylinder cap body vertically offers copper bush of fuel injector mounting hole, and copper bush of fuel injector is inserted in described copper bush of fuel injector mounting hole, to isolate upper water sleeve water cavity and cylinder cap ridge area water cavity.
In technique scheme, the bottom of copper bush of fuel injector has interior receipts taper mouth, and the bottom of copper bush of fuel injector mounting hole offers and the adaptive copper bush of fuel injector envelope compression of filling of interior receipts taper mouth outer wall.
In technique scheme, between copper bush of fuel injector upper portion side wall and copper bush of fuel injector mounting hole inwall, be provided with O RunddichtringO.
In technique scheme, the wall thickness of copper bush of fuel injector only has 1.3mm.
In technique scheme, the middle and lower part of copper bush of fuel injector has extruding fold.
Compared with prior art, the present invention has following beneficial effect: this cylinder cover for diesel engine oil sprayer mounting structure advantages of simple, use thin-walled copper bush of fuel injector instead oil sprayer is installed, oil sprayer lug discord cylinder head one casts out and reserved thicker wall thickness ties up space, cylinder cap ridge area, make the core of ridge area quite abundant, be not easy to occur sintering phenomenon, improved cylinder cap castability.In addition, owing to there is no the obstruction of oil sprayer lug, it is detectable and convenient that sand removal also can become.Meanwhile, copper bush of fuel injector wall is thin, has abdicated many water cavities space, and cooling water will pass through ridge area, to form good cooling capacity very smoothly, has improved the operational safety of cylinder cap at width.
Accompanying drawing explanation
Fig. 1 is the structural representation of cylinder cover for diesel engine oil sprayer mounting structure of the present invention;
Fig. 2 is the structural representation of the copper bush of fuel injector of cylinder cover for diesel engine oil sprayer mounting structure of the present invention;
Description of reference numerals:
1-cylinder cap body, 11-copper bush of fuel injector, 12-copper bush of fuel injector mounting hole, 13-upper water sleeve water cavity, 14-cylinder cap ridge area water cavity, 15-air outlet flue, 16-intake duct, 17-pushes fold, receives taper mouth, 19-O RunddichtringO in 18-.
Embodiment
Below in conjunction with accompanying drawing, a specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention is not subject to the restriction of embodiment.It will be appreciated that, mentioned in following mode of execution of the present invention " on ", D score, " left side ", " right side ", " front " and " reverse side " be all take the direction shown in each figure as benchmark, these words that are used for limiting direction are only used to be convenient to explanation, do not represent the restriction to the concrete technological scheme of the present invention.
The oil sprayer lug that cylinder cover for diesel engine oil sprayer mounting structure of the present invention goes out former need and cylinder head integrally casting, uses thin-walled copper bush of fuel injector instead oil sprayer is installed.Oil sprayer lug discord cylinder head one casts out, and does not also just need reserved thicker wall thickness to tie up space, cylinder cap ridge area, makes the core of ridge area quite abundant, is not easy to occur sintering phenomenon, has improved cylinder cap castability.In addition, owing to there is no the obstruction of oil sprayer lug, it is detectable and convenient that sand removal also can become.Meanwhile, copper bush of fuel injector wall is thin, has abdicated many water cavities space, and cooling water will pass through ridge area, to form good cooling capacity very smoothly, has improved the operational safety of cylinder cap at width.
As shown in Figure 1, the concrete structure of this cylinder cover for diesel engine oil sprayer mounting structure comprises: cylinder cap body 1, and be inserted into the copper bush of fuel injector 11 in this cylinder cap body 1.
Wherein, the middle part of cylinder cap body 1 vertically offers copper bush of fuel injector mounting hole 12, and copper bush of fuel injector mounting hole 12 is up big and down small stepped with the adaptive plug-in mounting of the outer wall of copper bush of fuel injector 11.The large ladder section in top around this copper bush of fuel injector mounting hole 12 offers respectively upper water sleeve water cavity 13 and cylinder cap ridge area water cavity 14, not when plug-in mounting copper bush of fuel injector 11, upper water sleeve water cavity 13 and cylinder cap ridge area water cavity 14 are setting up and down, are communicated with respectively with copper bush of fuel injector mounting hole 12.The little ladder section middle part, bottom of this copper bush of fuel injector mounting hole 12 offers circumferential copper bush of fuel injector envelope compression.The left and right sides of the interior copper bush of fuel injector mounting hole 12 of cylinder cap body 1 also offers respectively air outlet flue 15 and intake duct 16.
As shown in Figure 2, copper bush of fuel injector 11 is up big and down small ladder tubulose, and adaptive plug-in mounting enters in copper bush of fuel injector mounting hole 12.The wall thickness of copper bush of fuel injector 11 only has 1.3mm, and the middle and lower part of the large ladder section in top has extruding fold 17, to strengthen the rigidity of whole copper sheathing.The little ladder section in bottom of copper bush of fuel injector 11 has interior receipts taper mouth 18, when fuel injector copper sheathing pressure-mounting, can be by a standard steel ball by interior receipts taper mouth 18, make interior receipts taper mouth 18 sidewalls fill firmly the bottom little ladder section copper bush of fuel injector envelope compression of copper bush of fuel injector mounting hole 12 to surrounding, to form the sealing of firing chamber and cylinder cap bridge of the nose water cavity 14.Because copper bush of fuel injector wall thickness only has 1.3mm, the space of cylinder cap bridge of the nose water cavity 14 is increased, accelerate the efficiency of passing through of cooling liquid, cylinder cap reliability is significantly improved.
In addition, after fuel injector copper sheathing pressure-mounting, upper water sleeve water cavity 13 and cylinder cap ridge area water cavity 14 are kept apart by copper bush of fuel injector 11 and copper bush of fuel injector mounting hole 12, become independently cooling water chamber.Between copper bush of fuel injector 11 upper portion side wall and copper bush of fuel injector mounting hole 12 inwalls, be provided with O RunddichtringO 19, to seal upper water sleeve water cavity 13 and mounting hole of oil sprayer 12.Air outlet flue 15 and intake duct 16 are trapped among the periphery of copper bush of fuel injector 11 closely.Copper bush of fuel injector 11 has replaced existing casting oil injector hole lug, makes the core of cylinder cap bridge of the nose water cavity 14 become very sturdy, has well solved the thin core sintering that causes of core and has hindered water channel problem.In addition, because the space of cylinder cap ridge area water cavity 14 becomes large, it is very easy that sand removal also becomes.
This cylinder cover for diesel engine oil sprayer mounting structure advantages of simple, use thin-walled copper bush of fuel injector instead oil sprayer is installed, oil sprayer lug discord cylinder head one casts out and reserved thicker wall thickness ties up space, cylinder cap ridge area, make the core of ridge area quite abundant, be not easy to occur sintering phenomenon, improved cylinder cap castability.In addition, owing to there is no the obstruction of oil sprayer lug, it is detectable and convenient that sand removal also can become.Meanwhile, copper bush of fuel injector wall is thin, has abdicated many water cavities space, and cooling water will pass through ridge area, to form good cooling capacity very smoothly, has improved the operational safety of cylinder cap at width.
Disclosed is above only several specific embodiment of the present invention, and still, the present invention is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (5)
1. a cylinder cover for diesel engine oil sprayer mounting structure, is characterized in that, comprising: cylinder cap body, and be inserted into the intrinsic copper bush of fuel injector of described cylinder cap; The middle part of described cylinder cap body vertically offers copper bush of fuel injector mounting hole, and described copper bush of fuel injector is inserted in described copper bush of fuel injector mounting hole, to isolate upper water sleeve water cavity and cylinder cap ridge area water cavity.
2. cylinder cover for diesel engine oil sprayer mounting structure according to claim 1, it is characterized in that: the bottom of described copper bush of fuel injector has interior receipts taper mouth, the bottom of described copper bush of fuel injector mounting hole offers and the adaptive copper bush of fuel injector envelope compression of filling of described interior receipts taper mouth outer wall.
3. cylinder cover for diesel engine oil sprayer mounting structure according to claim 2, is characterized in that: between described copper bush of fuel injector upper portion side wall and copper bush of fuel injector mounting hole inwall, be provided with O RunddichtringO.
4. cylinder cover for diesel engine oil sprayer mounting structure according to claim 1, is characterized in that: the wall thickness of described copper bush of fuel injector only has 1.3mm.
5. according to the cylinder cover for diesel engine oil sprayer mounting structure described in any one in claim 1 to 4, it is characterized in that: the middle and lower part of described copper bush of fuel injector has extruding fold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210439572.0A CN103807070A (en) | 2012-11-07 | 2012-11-07 | Fuel injector installation structure for diesel engine cylinder head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210439572.0A CN103807070A (en) | 2012-11-07 | 2012-11-07 | Fuel injector installation structure for diesel engine cylinder head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103807070A true CN103807070A (en) | 2014-05-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210439572.0A Pending CN103807070A (en) | 2012-11-07 | 2012-11-07 | Fuel injector installation structure for diesel engine cylinder head |
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| Country | Link |
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| CN (1) | CN103807070A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074626A (en) * | 2014-07-07 | 2014-10-01 | 广西玉柴机器股份有限公司 | Oil sprayer hole for cylinder cover |
| CN105298707A (en) * | 2015-09-16 | 2016-02-03 | 大连理工大学 | Diesel engine combustion system with large-orifice-angle and high-extension-length fuel spray nozzle matched with large-diameter combustor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08144886A (en) * | 1994-11-15 | 1996-06-04 | Yanmar Diesel Engine Co Ltd | Fuel supply mechanism of diesel engine |
| JPH11132100A (en) * | 1997-10-27 | 1999-05-18 | Isuzu Motors Ltd | Cylinder head structure |
| CN101210531A (en) * | 2006-12-30 | 2008-07-02 | 广西玉柴机器股份有限公司 | Cylinder cap fuel injector copper sheathing pressure-mounting method |
| CN201318242Y (en) * | 2008-12-17 | 2009-09-30 | 东风汽车有限公司 | Spark plug spacer |
| CN201351563Y (en) * | 2008-12-24 | 2009-11-25 | 天津雷沃动力股份有限公司 | Fixing device of fuel injector of engine |
| US20120217323A1 (en) * | 2011-02-28 | 2012-08-30 | Volvo Lastvagnar Ab | Injector sleeve |
| CN202926504U (en) * | 2012-11-07 | 2013-05-08 | 广西玉柴机器股份有限公司 | Oil sprayer mounting structure of diesel engine cylinder cover |
-
2012
- 2012-11-07 CN CN201210439572.0A patent/CN103807070A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08144886A (en) * | 1994-11-15 | 1996-06-04 | Yanmar Diesel Engine Co Ltd | Fuel supply mechanism of diesel engine |
| JPH11132100A (en) * | 1997-10-27 | 1999-05-18 | Isuzu Motors Ltd | Cylinder head structure |
| CN101210531A (en) * | 2006-12-30 | 2008-07-02 | 广西玉柴机器股份有限公司 | Cylinder cap fuel injector copper sheathing pressure-mounting method |
| CN201318242Y (en) * | 2008-12-17 | 2009-09-30 | 东风汽车有限公司 | Spark plug spacer |
| CN201351563Y (en) * | 2008-12-24 | 2009-11-25 | 天津雷沃动力股份有限公司 | Fixing device of fuel injector of engine |
| US20120217323A1 (en) * | 2011-02-28 | 2012-08-30 | Volvo Lastvagnar Ab | Injector sleeve |
| CN202926504U (en) * | 2012-11-07 | 2013-05-08 | 广西玉柴机器股份有限公司 | Oil sprayer mounting structure of diesel engine cylinder cover |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074626A (en) * | 2014-07-07 | 2014-10-01 | 广西玉柴机器股份有限公司 | Oil sprayer hole for cylinder cover |
| CN105298707A (en) * | 2015-09-16 | 2016-02-03 | 大连理工大学 | Diesel engine combustion system with large-orifice-angle and high-extension-length fuel spray nozzle matched with large-diameter combustor |
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Application publication date: 20140521 |