CN101649798A - Fuel injector tightening structure - Google Patents
Fuel injector tightening structure Download PDFInfo
- Publication number
- CN101649798A CN101649798A CN200810073746A CN200810073746A CN101649798A CN 101649798 A CN101649798 A CN 101649798A CN 200810073746 A CN200810073746 A CN 200810073746A CN 200810073746 A CN200810073746 A CN 200810073746A CN 101649798 A CN101649798 A CN 101649798A
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- CN
- China
- Prior art keywords
- fuel injector
- oil sprayer
- tightening structure
- cover
- cylinder head
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- 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.)
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a fuel injector tightening structure, which comprises a fuel injector sleeve arranged on a cylinder cover and a camshaft framework fixed on the cylinder cover, wherein the bottom of the fuel injector sleeve is fixed on the cylinder cover, and the top of the fuel injector sleeve is matched with the camshaft framework; and a fuel injector is arranged in the fuel injector sleeve and is connected with the camshaft framework through a tightening threaded sleeve. Aiming at the defects that in the prior art, a connecting structure of the fuel injector and the cylinder cover iscomplex, the processing technique has high difficulties and the cost is high, the whole fuel injector tightening structure is simple and reliable and has good assembling property and manufacturability; besides, because a mounting hole of the whole fuel injector does not need to be casted on the cylinder cover, a cylinder cover die can be simplified and the processing technique of the cylinder cover can be optimized, thereby reducing the production cost and simultaneously providing convenience for maintenance overhaul. The fuel injector tightening structure can be widely applied to an engine with a four-valve twin overhead camshaft structure.
Description
Technical field
The present invention relates to a kind of engine structure, relate in particular to a kind of fuel injector tightening structure.
Background technique
In the prior art, adopt the diesel engine of four valve crest places the cam axle construction, need to arrange component such as intake valve, exhaust valve, air valve seat ring, valve spring, camshaft and oil sprayer on the cylinder head, structure is very compact.Wherein, oil sprayer generally is arranged in the neutral position of each cylinder, and the means of fixation of oil sprayer is generally the pressing plate compression type.For example, Chinese patent application number is 200510094175.4, denomination of invention has been for disclosing a kind of fastening clamper for fuel-injection device of diesel engine in the patent documentation of " fastening clamper for fuel-injection device of diesel engine ", comprises the oil sprayer that inserts in the cylinder cap, oil sprayer clip, the oil sprayer clip is anchored on clamping bolt on the cylinder cap; There are symmetrically arranged 2 to compress breach on the oil sprayer; Compress breach and the oil sprayer clip of oil sprayer compress end and adopt sphere to compress to connect, and oil sprayer clip profile is the Y font, and the cross section is arc.
Mounting hole of oil sprayer is typically designed to directly and is formed by the cylinder head casting, and the air cylinder head structure technology of this mode, casting mould are all very complicated, and the reject rate of casting is higher relatively, and the process for machining difficulty is also very high.Simultaneously, oil sprayer clip assembly technology relative complex not only independently, component production, management costs are also high, will directly cause the manufacture cost of complete machine higher relatively like this.
Summary of the invention
The objective of the invention is to, at oil sprayer in the prior art and cylinder head linkage structure complexity, processing technology difficulty height and defect of high cost, provide a kind of simple in structure, processing technology is simple, and lower-cost fuel injector tightening structure.
Fuel injector tightening structure of the present invention comprises the oil sprayer cover of being located on the cylinder head and is fixed on camshaft frame on the described cylinder head that described oil sprayer cover bottom is fixed on the described cylinder head, and described oil sprayer cover top cooperates with described camshaft frame; Described oil sprayer places in the described oil sprayer cover, is connected with described camshaft frame by fastening swivel nut.
Because adopt above-mentioned technological scheme, the present invention has following beneficial effect:
1, whole fuel injector tightening structure is simple and reliable, the assembling good manufacturability;
2, do not need on cylinder head, to cast out whole mounting hole of oil sprayer, can simplify the cylinder head mould, optimize the processing technology of cylinder head, thereby reduce production costs;
3, be convenient to maintenance overhaul.
Description of drawings
Fig. 1 is a fuel injector tightening structure assembly schematic representation of the present invention;
Fig. 2 is the sectional view of oil sprayer cover of the present invention;
Fig. 3 is the generalized section of fuel injector tightening structure of the present invention;
Mark the following drawings mark thereon in conjunction with the accompanying drawings:
The 1-cylinder head; The 2-camshaft frame; The fastening swivel nut of 3-; The 4-oil sprayer; The 5-circlip; The 6-O RunddichtringO; 7-oil sprayer cover; 8-oil sprayer cover mounting hole.
Embodiment
The present invention is described in detail below in conjunction with accompanying drawing.
As shown in Figure 1 to Figure 3, the fuel injector tightening structure of the embodiment of the invention comprises oil sprayer cover of being located on the cylinder head 17 and the camshaft frame 2 that is fixed on the cylinder head 1.
Oil sprayer overlaps 7 bottoms and is fixed on the cylinder head 1, is used for blanket gas cylinder cap 1 internal lubrication oil.Cylinder head 1 is provided with oil sprayer cover mounting hole 8, and oil sprayer overlaps 7 bottoms and oil sprayer cover mounting hole 8 interference fit.Oil sprayer overlaps 7 tops and camshaft frame 2 Spielpassung.
Camshaft frame 2, oil sprayer cover 7 and cylinder head 1 form step-like mounting hole of oil sprayer, and oil sprayer 4 places in the mounting hole of oil sprayer, and being threaded with camshaft frame 2 by fastening swivel nut 3 fixes oil sprayer 4.Also be provided with circlip 5 with fastening swivel nut 3 position contacting on the oil sprayer 4, come spacing fastening swivel nut 3, when fastening swivel nut 3 is tightened, compress oil sprayer 4 in camshaft frame 2 tapped holes, thereby realize the fastening of oil sprayer 4.
In the present embodiment, oil sprayer cover 7 is the thin-walled steel bushing, to save the mid-oil sprayer arrangement space of valve mechanism component on every side.Camshaft frame 2 is a ladder-shaped frame, has enough rigidity and intensity, is directly installed on the cylinder head 1.Fastening swivel nut 3 can directly be enclosed within on the oil sprayer 4, or circlip 5 also can be installed together by direct injection device 4, or fastening swivel nut 3 and circlip 5 integrate with oil sprayer 4 together.
Fuel injector tightening structure of the present invention has the simplification air cylinder head structure, reduces cylinder head casting, difficulty of processing, optimizes assembly technology, thereby reduces the complete machine manufacture cost and other advantages, can be widely used in the motor of four valve crest places the cam axle construction.
It should be noted that at last: above embodiment only in order to the explanation the present invention and and unrestricted technological scheme described in the invention; Therefore, although this specification has been described in detail the present invention with reference to each above-mentioned embodiment,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the present invention; And all do not break away from the technological scheme and the improvement thereof of the spirit and scope of the present invention, and it all should be encompassed in the claim scope of the present invention.
Claims (9)
1, a kind of fuel injector tightening structure, it is characterized in that, comprise the oil sprayer cover of being located on the cylinder head and be fixed on camshaft frame on the described cylinder head, the bottom of described oil sprayer cover is fixed on the described cylinder head, and the top of described oil sprayer cover cooperates with described camshaft frame; Described oil sprayer places in the described oil sprayer cover, and is connected with described camshaft frame by fastening swivel nut.
2, fuel injector tightening structure according to claim 1 is characterized in that, described oil sprayer is arranged with O type seal groove, and described oil sprayer cover is sealed and matched by O RunddichtringO and described camshaft frame.
3, fuel injector tightening structure according to claim 1 is characterized in that, described cylinder head is provided with oil sprayer cover mounting hole, described oil sprayer cover bottom and described oil sprayer cover mounting hole interference fit.
4, fuel injector tightening structure according to claim 1 is characterized in that, described oil sprayer cover is a Spielpassung with described camshaft frame.
5, fuel injector tightening structure according to claim 1 is characterized in that, described camshaft frame is a ladder-shaped frame.
6, according to any described fuel injector tightening structure in the claim 1 to 5, it is characterized in that, be provided with circlip with described fastening screw cover contacting point on the described oil sprayer.
7, fuel injector tightening structure according to claim 1 is characterized in that, described oil sprayer cover is the thin-walled steel bushing.
8, fuel injector tightening structure according to claim 3 is characterized in that, described camshaft frame, described oil sprayer cover and described cylinder head form step-like mounting hole of oil sprayer.
9, fuel injector tightening structure according to claim 6 is characterized in that, described fastening swivel nut and/or described circlip and described oil sprayer are an overall structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810073746A CN101649798A (en) | 2008-08-12 | 2008-08-12 | Fuel injector tightening structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810073746A CN101649798A (en) | 2008-08-12 | 2008-08-12 | Fuel injector tightening structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101649798A true CN101649798A (en) | 2010-02-17 |
Family
ID=41672102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810073746A Pending CN101649798A (en) | 2008-08-12 | 2008-08-12 | Fuel injector tightening structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101649798A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108049981A (en) * | 2017-11-02 | 2018-05-18 | 宝沃汽车（中国）有限公司 | Cylinder head and with its engine and vehicle |
-
2008
- 2008-08-12 CN CN200810073746A patent/CN101649798A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108049981A (en) * | 2017-11-02 | 2018-05-18 | 宝沃汽车（中国）有限公司 | Cylinder head and with its engine and vehicle |
| CN108049981B (en) * | 2017-11-02 | 2020-07-24 | 北汽福田汽车股份有限公司 | Cylinder head and have its engine and vehicle |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100217 |