CN107387278A - A kind of common rail diesel engine high pressure fuel line connection - Google Patents
A kind of common rail diesel engine high pressure fuel line connection Download PDFInfo
- Publication number
- CN107387278A CN107387278A CN201710763087.1A CN201710763087A CN107387278A CN 107387278 A CN107387278 A CN 107387278A CN 201710763087 A CN201710763087 A CN 201710763087A CN 107387278 A CN107387278 A CN 107387278A
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- China
- Prior art keywords
- connecting rod
- high pressure
- oil pipe
- diesel engine
- common rail
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/004—Joints; Sealings
- F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a kind of common rail diesel engine high pressure fuel line connection, including connecting bend, high-pressure oil pipe, compact heap and high pressure connecting rod, high-pressure oil pipe is set in described connecting bend vertical direction top connecting hole, high pressure connecting rod is set in the horizontal direction front portion connecting hole of connecting bend, compact heap is arranged on the rear portion of connecting bend, and compact heap is arranged in cylinder head by housing pin；Common rail diesel engine high pressure fuel line connection of the present invention employs rational structure, solves the connection problem of common rail diesel engine electromagnetic fuel injector high pressure fuel side oil-feed, improves charge oil pressure, the performance of diesel engine is further got a promotion；High pressure pipe assembly installation is reliable, avoids high pressure fuel and is not revealed from common rail pipe to fuel injector, realizes convenient installation and the effect of excellent sealing of common rail diesel engine fuel system with high injection pressure.
Description
Technical field
The invention belongs to Design Technology for Diesels technical field, relates generally to a kind of common rail diesel engine high pressure fuel line connection.
Background technology
High Pressure Common-Rail Fuel Inject is to separate the generation of fuel pressure with fuel injection processes, by
In the opening and closing for the high-speed electromagnetic valve being integrated on each fuel injector, timing, quantitative control fuel injector are sprayed to burning
The oil mass of room.System has high injection pressure, and simultaneously Precise Control of Oil amount can be adjusted according to duty requirements, realizes preferable oil spout
Rule, fuel atomizing degree is improved, ensures that diesel engine reaches good fuel atomization effect and best combustion ratio, can be effective
Improvement diesel emission characteristic, reduce PM, reduce NOx discharge capacity.In the prior art, diesel engine electromagnetic fuel injector oil inlet
It is joined directly together with common rail pipe oil-out using high-pressure oil pipe, high-pressure oil pipe connection and sealing mode is using in oil pipe both ends of the surface
Plain washer and cap nut, oil pipe end processing conical seal (contact) face, the fuel injector oil inlet and common rail being engaged are loaded onto before upset
Pipe oil-out threading and internal necking bellmouth, compress and install by cap nut.Above-mentioned connection method, for common rail bavin
The connection that oil machine side feeding type electromagnetic fuel injector can not have been realized, and with common rail diesel engine fuel system charge oil pressure
Improve constantly, the strength of materials and connection method to high-pressure oil pipe propose higher requirement, for high-strength high-voltage oil pipe, adopted
With upset method, strong forging easily causes tubing bending and cracked, and is influenceed by factors such as high-pressure oil pipe vibrations,
Easily cause leakage.
The content of the invention
The purpose of the present invention is to propose to a kind of common rail diesel engine high pressure fuel line connection, realizes and electromagnetic fuel injector side
The installation and sealing of feeding type, by the use of the present invention, can effectively solve in the oil-feed connection of electromagnetic fuel injector side
Leakage, make the connection between high-pressure oil pipe and electromagnetic fuel injector very convenient reliable, and improve the work effect of diesel engine
Rate, improve overall performance.
The purpose of the present invention can be adopted the following technical scheme that to realize：
A kind of common rail diesel engine high pressure fuel line connection, including connecting bend, high-pressure oil pipe, compact heap and high pressure connecting rod,
High-pressure oil pipe is set in described connecting bend vertical direction top connecting hole, in the horizontal direction front portion connecting hole of connecting bend
High pressure connecting rod is set, and compact heap is arranged on the rear portion of connecting bend, and compact heap is arranged in cylinder head by housing pin；Institute
The connecting bend stated is square bend configuration, and top is oil pipe connecting hole, and front portion is connecting rod bores, is connected inside connecting bend,
Connecting rod internal thread hole is provided with connecting rod bores inner circle, connecting rod bellmouth is provided with bottom surface；In oil pipe connecting hole inner circle
Oil pipe internal thread hole is provided with, oil pipe bellmouth is provided with bottom surface；Described high pressure connecting rod is cylindrical casing, and high pressure connects
Bar one end is arranged in the connecting rod bores of connecting bend front portion, and end face is provided with connecting rod conical head, the company of being provided with termination is cylindrical
Connecting rod bellmouth and connecting rod internal thread hole in extension bar external screw thread, with connecting bend connecting rod bores are connected；The other end
End face is provided with oil-out conical head and is connected with electromagnetic fuel injector oil inlet dimensional fits；High pressure connecting rod was provided centrally with
Oilhole, the cylindrical centre position of high pressure connecting rod are provided with two parallel connecting rod platforms.
Described high-pressure oil pipe is cylindrical casing, and high-pressure oil pipe one end is arranged in the oil pipe connecting hole of connecting bend top,
Oil pipe conical head is provided with end face, is provided with oil tube external thread, oil tube external thread and oil pipe conical head and company on termination is cylindrical
Connect the oil pipe bellmouth in elbow oil pipe connecting hole and oil pipe internal thread hole is connected, the other end and the common rail of high-pressure oil pipe fill
Connection is put, high-pressure oil pipe is provided centrally with through hole.
Described connecting bend rear portion both sides are provided with two symmetrical grooves.
Described compact heap is L-type pressure plate structure, and the seal face of compact heap upper and lower ends is arc, and centre is provided with installation
Hole, the upper end seal face of compact heap are pressed in connecting bend rear groove, and lower end seal face is pressed in cylinder head, compact heap
Spherical washer is provided with above mounting hole.
Described housing pin is arranged on spherical washer, and housing pin passes through compact heap mounting hole and consolidating in cylinder head
Determine screw hole connection.
O-ring groove is provided with the connecting rod bores of described connecting bend is cylindrical, O-ring is provided with O-ring groove.
The described connecting hole centerlines of connecting bend two are into 85 °~90 °.
Common rail diesel engine high pressure fuel line connection of the present invention employs rational structure, solves co-rail diesel
The connection problem of machine electromagnetic fuel injector high pressure fuel side oil-feed, improves charge oil pressure, the performance of diesel engine is further obtained
To lifting；High pressure pipe assembly installation is reliable, avoids high pressure fuel and is not revealed from common rail pipe to fuel injector, realizes co-rail diesel
The convenient installation of machine fuel system with high injection pressure and the effect of excellent sealing.
Brief description of the drawings
Fig. 1, the structural representation for the present invention.
Fig. 2, the structural representation for part 5 in Fig. 1.
Fig. 3, the structural representation for part 2 in Fig. 1.
In figure：1st, cylinder head；2nd, compact heap；3rd, spherical washer；4th, housing pin；5th, connecting bend；6th, connecting rod is bored
Shape hole, 7, connecting rod conical head, 8, oil pipe bellmouth；9th, oil pipe conical head, 10, oil pipe internal thread hole, 11, oil tube external thread,
12nd, high-pressure oil pipe, 13, connecting rod internal thread hole, 14, O-ring, 15, connecting rod external screw thread, 16, connecting rod platform, 17, high pressure
Connecting rod, 18, oil-out conical head, 19 electromagnetic fuel injectors, 20, groove, 21, compact heap mounting hole, 22, lower seal face, 23, on
Seal face.
Embodiment
The invention will be further described with reference to the accompanying drawings and detailed description：
Explanation that can be detailed by the following examples is of the invention, and the open purpose of the present invention is intended to protect in the scope of the invention
All technological improvements.
A kind of common rail diesel engine high pressure fuel line connection as shown in accompanying drawing 1, Fig. 2, Fig. 3, including connecting bend 5, height
Pressuring oil pipe 12, compact heap 2 and high pressure connecting rod 17, described connecting bend 5 are ell elbow structures, and top connects for oil pipe
Hole, front portion are connecting rod bores, and the inside of connecting bend 5 is connected, and connecting rod internal thread hole 13, bottom surface are provided with connecting rod bores inner circle
On be provided with connecting rod bellmouth 6；Oil pipe internal thread hole 10 is provided with oil pipe connecting hole inner circle, oil pipe cone is provided with bottom surface
Shape hole 8；Connecting bend rear portion both sides are provided with two symmetrical grooves 20, are provided with O on the connecting rod bores of connecting bend 5 is cylindrical
Type ring recess, O-ring 14 is provided with O-ring groove, 5 liang of connecting hole centerlines of connecting bend are into 85 °~90 °；Described height
Pressure connecting rod 17 is arranged in the horizontal direction front portion connecting hole of connecting bend 5, and high pressure connecting rod 17 is cylindrical casing, and high pressure connects
The one end of extension bar 17 is arranged in 5 anterior connecting rod bores of connecting bend, and end face is provided with connecting rod conical head 7, is set on termination is cylindrical
Connecting rod external screw thread 15 is equipped with, is coordinated with the connecting rod bellmouth 6 in the connecting rod bores of connecting bend 5 and connecting rod internal thread hole 13
Connection, the sealing effectiveness that the connected mode of taper hole face has had, other end end face are provided with oil-out conical head 18 and electromagnetism spray
Oily device oil inlet dimensional fits connection；High pressure connecting rod 17 is provided centrally with oil-through hole, 16 cylindrical interposition of high pressure connecting rod
Install and be equipped with two parallel connecting rod platforms 16, connecting rod platform 17 conveniently screws up with a wrench on connecting bend 5.Described
High-pressure oil pipe 12 is vertically arranged in the top connecting hole of connecting bend 5, and high-pressure oil pipe 12 is cylindrical casing, and the one end of high-pressure oil pipe 12 is set
Put in the top oil pipe connecting hole of connecting bend 5, oil pipe conical head 9 is provided with end face, be provided with outside oil pipe on termination is cylindrical
Screw thread 11, oil tube external thread 11 and oil pipe conical head 9 and spiral shell in the oil pipe bellmouth 8 and oil pipe in connecting bend oil pipe connecting hole
Pit 10 is connected, the sealing effectiveness played by the connection of taper hole face, and the other end and the common rail of high-pressure oil pipe 12 fill
Connection is put, high-pressure oil pipe is provided centrally with through hole；Described compact heap 2 is arranged on the rear portion of connecting bend 5, passes through housing pin
4 are arranged in cylinder head 1, and compact heap 2 is L-type pressure plate structure, and the upper and lower ends of compact heap 2 are provided with arc seal face, arc pressure
Tight face can preferably contact compression with compacted position, and compact heap mounting hole 21, the upper end of compact heap 2 are provided among compact heap 2
Upper seal face 23 be pressed in the groove 20 at connecting bend rear portion, seal face 22 is pressed in cylinder head 1 under lower end, compact heap
Mounting hole 21 is provided with spherical washer 3 above, and housing pin 4 is arranged on spherical washer 3, and housing pin 4 is pacified by compact heap
Dress hole 21 is connected with the fixed screw holes in cylinder head 1, and spherical washer 3 has good anti-loosing effect to housing pin 4.
When mounted, high pressure connecting rod 17 is connected in the connecting rod bores of connecting bend 5 first, passes through screw thread and the conical surface
Common cooperation prevent leakage, high-pressure oil pipe 17 is connected in the oil pipe connecting hole of connecting bend afterwards, pass through screw thread with cone
The common cooperation prevent leakage in face, it is fixed and clamped block 2 using housing pin 4, compact heap 2 is compressed connecting bend 5 and make high pressure
Oil-out conical head 18 in connecting rod 17 is closely connected with the oil inlet of electromagnetic fuel injector 19, so as to complete whole installation process.
Part not in the detailed description of the invention is prior art.
Claims (7)
1. a kind of common rail diesel engine high pressure fuel line connection, it is characterized in that：Including connecting bend, high-pressure oil pipe, compact heap and
High pressure connecting rod, described connecting bend vertical direction top connecting hole is interior to set high-pressure oil pipe, the horizontal direction of connecting bend
High pressure connecting rod is set in anterior connecting hole, and compact heap is arranged on the rear portion of connecting bend, and compact heap is set by housing pin
In cylinder head；Described connecting bend is square bend configuration, and top is oil pipe connecting hole, and front portion is connecting rod bores, connection
Connected inside elbow, be provided with connecting rod internal thread hole in connecting rod bores inner circle, connecting rod bellmouth is provided with bottom surface；Oil pipe
Oil pipe internal thread hole is provided with connecting hole inner circle, oil pipe bellmouth is provided with bottom surface；Described high pressure connecting rod is cylinder
Sleeve pipe, high pressure connecting rod one end are arranged in the connecting rod bores of connecting bend front portion, and end face is provided with connecting rod conical head, outside termination
Connecting rod external screw thread is provided with circle, is coordinated with the connecting rod bellmouth in connecting bend connecting rod bores and connecting rod internal thread hole
Connection；Other end end face is provided with oil-out conical head and is connected with electromagnetic fuel injector oil inlet dimensional fits；High pressure connecting rod
Oil-through hole is provided centrally with, the cylindrical centre position of high pressure connecting rod is provided with two parallel connecting rod platforms.
2. a kind of common rail diesel engine high pressure fuel line connection according to claim 1, it is characterized in that：Described hydraulic oil
Manage and be arranged on for cylindrical casing, high-pressure oil pipe one end in the oil pipe connecting hole of connecting bend top, oil pipe taper is provided with end face
Head, be provided with termination is cylindrical oil tube external thread, oil tube external thread and oil pipe conical head with connecting bend oil pipe connecting hole
Oil pipe bellmouth and oil pipe internal thread hole are connected, and the other end of high-pressure oil pipe is connected with common-rail system, high-pressure oil pipe center
It is provided with through hole.
3. a kind of common rail diesel engine high pressure fuel line connection according to claim 1, it is characterized in that：Connecting bend rear portion
Both sides are provided with two symmetrical grooves.
4. a kind of common rail diesel engine high pressure fuel line connection according to claim 1 or 3, it is characterized in that：Described pressure
Tight block is L-type pressure plate structure, and the seal face of compact heap upper and lower ends is arc, and centre is provided with mounting hole, the upper end of compact heap
Seal face is pressed in connecting bend rear groove, and lower end seal face is pressed in cylinder head, is set above compact heap mounting hole
There is spherical washer.
5. a kind of common rail diesel engine high pressure fuel line connection according to claim 1, it is characterized in that：Described compression spiral shell
Silk is arranged on spherical washer, and housing pin is connected by compact heap mounting hole with the fixed screw holes in cylinder head.
6. a kind of common rail diesel engine high pressure fuel line connection according to claim 1, it is characterized in that：Described connecting bending
Head connecting rod bores it is cylindrical on be provided with O-ring groove, be provided with O-ring in O-ring groove.
7. a kind of common rail diesel engine high pressure fuel line connection according to claim 1, it is characterized in that：Described connecting bending
First two connecting holes centerlines are into 85 °~90 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710763087.1A CN107387278A (en) | 2017-08-30 | 2017-08-30 | A kind of common rail diesel engine high pressure fuel line connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710763087.1A CN107387278A (en) | 2017-08-30 | 2017-08-30 | A kind of common rail diesel engine high pressure fuel line connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107387278A true CN107387278A (en) | 2017-11-24 |
Family
ID=60348116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710763087.1A Pending CN107387278A (en) | 2017-08-30 | 2017-08-30 | A kind of common rail diesel engine high pressure fuel line connection |
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| Country | Link |
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| CN (1) | CN107387278A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112031970A (en) * | 2020-08-28 | 2020-12-04 | 广东海洋大学 | Common rail diesel engine high pressure fuel pipe connecting device with leakage monitoring function |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19543506A1 (en) * | 1995-11-22 | 1997-05-28 | Man Nutzfahrzeuge Ag | Injection line connection to compression tube of injection valve |
| CN202756152U (en) * | 2012-08-23 | 2013-02-27 | 浙江福仕德燃油喷射***有限公司 | Connecting structure of oil atomizer body and oil inlet connector |
| CN205503690U (en) * | 2016-03-08 | 2016-08-24 | 哈尔滨飞机工业集团有限责任公司 | Compression bolt |
| CN207261143U (en) * | 2017-08-30 | 2018-04-20 | 河南柴油机重工有限责任公司 | A kind of common rail diesel engine high pressure fuel line connection |
-
2017
- 2017-08-30 CN CN201710763087.1A patent/CN107387278A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19543506A1 (en) * | 1995-11-22 | 1997-05-28 | Man Nutzfahrzeuge Ag | Injection line connection to compression tube of injection valve |
| CN202756152U (en) * | 2012-08-23 | 2013-02-27 | 浙江福仕德燃油喷射***有限公司 | Connecting structure of oil atomizer body and oil inlet connector |
| CN205503690U (en) * | 2016-03-08 | 2016-08-24 | 哈尔滨飞机工业集团有限责任公司 | Compression bolt |
| CN207261143U (en) * | 2017-08-30 | 2018-04-20 | 河南柴油机重工有限责任公司 | A kind of common rail diesel engine high pressure fuel line connection |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112031970A (en) * | 2020-08-28 | 2020-12-04 | 广东海洋大学 | Common rail diesel engine high pressure fuel pipe connecting device with leakage monitoring function |
| CN112031970B (en) * | 2020-08-28 | 2022-03-11 | 广东海洋大学 | Common rail diesel engine high pressure fuel pipe connecting device with leakage monitoring function |
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Application publication date: 20171124 |