CN208651012U - Diesel engine low-voltage fuel pipeline - Google Patents
Diesel engine low-voltage fuel pipeline Download PDFInfo
- Publication number
- CN208651012U CN208651012U CN201820648645.XU CN201820648645U CN208651012U CN 208651012 U CN208651012 U CN 208651012U CN 201820648645 U CN201820648645 U CN 201820648645U CN 208651012 U CN208651012 U CN 208651012U
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- CN
- China
- Prior art keywords
- oil
- oil return
- connecting tube
- injector
- rail
- 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
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Abstract
The utility model discloses a kind of diesel engine low-voltage fuel pipelines, including double-U-shaped oil return pipe, double-U-shaped oil return pipe includes superposed high pressure oil rail oil return connecting tube and oil return of oil injector connecting tube, high pressure oil rail and oil return of oil injector gathering tube positioned at middle part, high-pressure oil pump oil return connecting tube and total oil return connecting tube positioned at lower part, the lower end of high pressure oil rail oil return connecting tube and oil return of oil injector connecting tube is connect by the first three-way connection with the high pressure oil rail of oil return of oil injector gathering tube with the upper end of oil return of oil injector gathering tube, high pressure oil rail is connect by the second three-way connection with the upper end of high-pressure oil pump oil return connecting tube and total oil return connecting tube with the lower end of oil return of oil injector gathering tube.The utility model can replace the function of pressure limiting valve, guarantee to be still filled with fuel oil when fuel oil air pump inoperative in oil pump, at low cost, high reliablity, and more traditional pressure limiting valve design has greater advantage, have broad application prospects.
Description
Technical field
The utility model relates to technical field of engines, in particular to a kind of diesel engine low-voltage fuel pipeline.
Background technique
Electric-control diesel engine needs to use the high-pressure fuel oil system by computer template contral, the fuel pump rotation in the system
Rotation mechanism is generally lubricated by fuel oil.General oil pump is after engine stop work, and internal fuel oil will drain off, this will lead
It causes occur dry friction when restarting next time, and then damages oil pump.The generation of the phenomenon in order to prevent, high-pressure oil pump needs cooperate back
Oily pressure limiting valve design can prevent fuel oil missing when oily air pump inoperative from fuel pump being caused to damage.From however pressure limiting valve is at high cost, rapid wear
Bad, current after market failure is higher.Therefore, a kind of alternate embodiments of pressure limiting valve are needed.
Summary of the invention
The purpose of the utility model is to overcome the deficiencies of above-mentioned background technique, and provide a kind of diesel engine low pressure combustion
Oil pipe line can replace the function of pressure limiting valve, guarantee to be still filled with fuel oil in oil pump when fuel oil air pump inoperative.
To achieve the above object, diesel engine low-voltage fuel pipeline, special character designed by the utility model exist
In, including double-U-shaped oil return pipe, the double-U-shaped oil return pipe include that superposed high pressure oil rail oil return connecting tube and fuel injector return
Oil connecting pipe, the high pressure oil rail positioned at middle part and oil return of oil injector gathering tube, positioned at lower part high-pressure oil pump oil return connecting tube and
Total oil return connecting tube, the upper end of the high pressure oil rail oil return connecting tube and the oil return pipe of high pressure oil rail connect, and the fuel injector returns
The upper end of oil connecting pipe is connect with oil return of oil injector pipe, under the high pressure oil rail oil return connecting tube and oil return of oil injector connecting tube
End is connect by the first three-way connection with the high pressure oil rail of oil return of oil injector gathering tube with the upper end of oil return of oil injector gathering tube, institute
The lower end for stating high pressure oil rail and oil return of oil injector gathering tube passes through the second three-way connection and high-pressure oil pump oil return connecting tube and total time
The upper end of oil connecting pipe connects, and the lower end of the high-pressure oil pump oil return connecting tube and the oil return pipe of high-pressure oil pump connect, described total
The lower end of oil return connecting tube is connect with total oil return pipe.
Further, the high pressure oil rail oil return connecting tube is connected by the oil return pipe of quick connector and high pressure oil rail, institute
Total oil return connecting tube is stated to connect by quick connector with total oil return pipe.
Further, the oil return of oil injector connecting tube is connect by Pa type joint with oil return of oil injector pipe, the height
Pressure oil pump oil return connecting tube is connected by the oil return pipe of Pa type joint and high-pressure oil pump.
Further, second three-way connection is located at the top of high-pressure oil pump.
It further, further include the fuel oil control panel being installed in gear chamber, the oil inlet passage of the fuel oil control panel,
Drainback passage is connect by through-hole connector with oil inlet access, the way to cycle oil of vehicle fuel oil respectively, the fuel oil control panel
Oil inlet passage is connect by oil inlet pipe with high-pressure oil pump, and the drainback passage of the fuel oil control panel is connect with total oil return connecting tube.
The utility model proposes a kind of diesel engine low-voltage fuel pipeline, can replace pressure limiting valve function, guarantee combustion
Fuel oil is still filled with when oily air pump inoperative in oil pump.The utility model has the characteristics that at low cost, high reliablity, more traditional pressure limiting
Valve design has greater advantage, has broad application prospects.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the diesel engine low-voltage fuel pipeline of the utility model.
Fig. 2 is the structural schematic diagram of double-U-shaped oil return pipe in Fig. 1.
In figure: high pressure oil rail 1, double-U-shaped oil return pipe 2, high pressure oil rail oil return connecting tube 2a, oil return of oil injector connecting tube 2b,
High pressure oil rail and oil return of oil injector gathering tube 2c, high-pressure oil pump oil return connecting tube 2d, total oil return connecting tube 2e, high-pressure oil pump 3, spiral shell
Bolt 4, fuel oil control panel 5, through-hole connector 6, oil inlet pipe 7, Pa type joint 8, quick connector 9, the first three-way connection 10a, the two or three
Pass joint 10b.
Specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, the utility model proposes a kind of diesel engine low-voltage fuel pipeline, including it is high pressure oil rail 1, double
U-shaped oil return pipe 2, high-pressure oil pump 3, fuel oil control panel 5.
High pressure oil rail 1 and high-pressure oil pump 3 are separately mounted in engine cylinder cover and gear chamber；Fuel oil control panel 5 passes through spiral shell
Bolt 4 is mounted in gear chamber.The oil inlet passage of fuel oil control panel 5, one end of drainback passage respectively by through-hole connector 6 with it is whole
The oil inlet access of vehicle fuel oil, way to cycle oil connection, the other end of the oil inlet passage of fuel oil control panel 5 pass through oil inlet pipe 7 and high pressure
Oil pump 3 connects, and the other end of the drainback passage of fuel oil control panel 5 is connect by quick connector 9 with total oil return connecting tube 2e.
Double-U-shaped oil return pipe 2 includes superposed high pressure oil rail oil return connecting tube 2a and oil return of oil injector connecting tube 2b, position
Connect in the high pressure oil rail and oil return of oil injector gathering tube 2c at middle part, positioned at the high-pressure oil pump oil return connecting tube 2d of lower part and total oil return
Adapter tube 2e.
The upper end of high pressure oil rail oil return connecting tube 2a is connect by quick connector 9 with the oil return pipe of high pressure oil rail 1, fuel injector
The upper end of oil return connecting tube 2b is connect by Pa type joint 8 with oil return of oil injector pipe.High pressure oil rail oil return connecting tube 2a and oil spout
The lower end of device oil return connecting tube 2b passes through the high pressure oil rail and fuel injector of the first three-way connection 10a and oil return of oil injector gathering tube 2c
The upper end of oil return gathering tube 2c connects, and the lower end of high pressure oil rail and oil return of oil injector gathering tube 2c pass through the second three-way connection 10b
It is connect with the upper end of high-pressure oil pump oil return connecting tube 2d and total oil return connecting tube 2e, and the second three-way connection 10b is located at high pressure oil
The top of pump 3.The lower end of high-pressure oil pump oil return connecting tube 2d is connect by Pa type joint 8 with the oil return pipe of high-pressure oil pump 3, total to return
The lower end of oil connecting pipe 2e is connect by quick connector 9 with total oil return pipe.
When utility model works, vehicle fuel oil enters fuel oil control by the oil inlet through-hole connector on fuel oil control panel 5
Oil duct in plate 5, the fuel oil in the oil duct are entered in high-pressure oil pump 3 by oil inlet pipe 7, and high-pressure oil pump 3 passes through pressure duct
It delivers fuel into high pressure oil rail 1 and fuel injector；The oil return of high pressure oil rail 1 and the oil return of fuel injector pass through double-U-shaped oil return
High pressure oil rail oil return connecting tube 2a, oil return of oil injector connecting tube 2b, the first three-way connection 10a in pipeline 2 are imported into high pressure
In oily rail and oil return of oil injector gathering tube 2c；Since the return pressure of high-pressure oil pump 3 is larger, the oil return of high-pressure oil pump 1 will pass through
High-pressure oil pump oil return connecting tube 2d flows through the second three-way connection 10b and high pressure oil rail and oil return of oil injector toward engine top
Fuel oil mixing in gathering tube 2c, then be imported into total oil return connecting tube 2e by the second three-way connection, then controlled by fuel oil
Through-hole connector 6 on plate 5 flows into vehicle fuel tank；Due to the oil return opening of the position high-pressure oil pump 3 of the second three-way connection 10b, because
This, due to the gravity of 3 oil return pipe intermediate fuel oil of high-pressure oil pump, will keep the fuel oil in oil pump not when engine stop works
It drains off, to substitute pressure limiting valve function.
Above-described embodiment is the preferable embodiment of the utility model, but the embodiments of the present invention is not by above-mentioned
The limitation of embodiment, it is made under other any spiritual essence and principles without departing from the utility model to change, modify, replacing
In generation, simplifies combination, should be equivalent substitute mode, is included within the protection scope of the utility model.
Claims (5)
1. a kind of diesel engine low-voltage fuel pipeline, it is characterised in that: including double-U-shaped oil return pipe (2), the double-U-shaped oil return
Managing (2) includes superposed high pressure oil rail oil return connecting tube (2a) and oil return of oil injector connecting tube (2b), the height positioned at middle part
Pressure oil rail and oil return of oil injector gathering tube (2c), high-pressure oil pump oil return connecting tube (2d) and total oil return connecting tube positioned at lower part
The upper end of (2e), the high pressure oil rail oil return connecting tube (2a) are connect with the oil return pipe of high pressure oil rail (1), the oil return of oil injector
The upper end of connecting tube (2b) is connect with oil return of oil injector pipe, and the high pressure oil rail oil return connecting tube (2a) connects with oil return of oil injector
The lower end for managing (2b) passes through the high pressure oil rail and oil return of oil injector of the first three-way connection (10a) and oil return of oil injector gathering tube (2c)
The upper end of gathering tube (2c) connects, and the lower end of the high pressure oil rail and oil return of oil injector gathering tube (2c) pass through the second three-way connection
(10b) is connect with the upper end of high-pressure oil pump oil return connecting tube (2d) and total oil return connecting tube (2e), and the high-pressure oil pump oil return connects
The lower end of adapter tube (2d) is connect with the oil return pipe of high-pressure oil pump (3), the lower end of total oil return connecting tube (2e) and total oil return pipe
Connection.
2. diesel engine low-voltage fuel pipeline according to claim 1, it is characterised in that: the high pressure oil rail oil return connects
Adapter tube (2a) is connect by quick connector (9) with the oil return pipe of high pressure oil rail (1), and total oil return connecting tube (2e) by inserting fastly
Connector (9) is connect with total oil return pipe.
3. diesel engine low-voltage fuel pipeline according to claim 1, it is characterised in that: the oil return of oil injector connection
Pipe (2b) is connect by Pa type joint (8) with oil return of oil injector pipe, and the high-pressure oil pump oil return connecting tube (2d) is connect by Pa type
Head (8) is connect with the oil return pipe of high-pressure oil pump (3).
4. diesel engine low-voltage fuel pipeline according to claim 1, it is characterised in that: second three-way connection
(10b) is located at the top of high-pressure oil pump (3).
5. diesel engine low-voltage fuel pipeline according to claim 1, it is characterised in that: further include being installed on gear chamber
On fuel oil control panel (5), the oil inlet passage of the fuel oil control panel (5), drainback passage respectively by through-hole connector (6) with
The oil inlet access of vehicle fuel oil, way to cycle oil connection, the oil inlet passage of the fuel oil control panel (5) pass through oil inlet pipe (7) and high
Pressure oil pump (3) connection, the drainback passage of the fuel oil control panel (5) are connect with total oil return connecting tube (2e).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820648645.XU CN208651012U (en) | 2018-05-02 | 2018-05-02 | Diesel engine low-voltage fuel pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820648645.XU CN208651012U (en) | 2018-05-02 | 2018-05-02 | Diesel engine low-voltage fuel pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208651012U true CN208651012U (en) | 2019-03-26 |
Family
ID=65776903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820648645.XU Expired - Fee Related CN208651012U (en) | 2018-05-02 | 2018-05-02 | Diesel engine low-voltage fuel pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208651012U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113982898A (en) * | 2021-10-15 | 2022-01-28 | 芜湖钻石航空发动机有限公司 | Engine high-pressure oil pump fire resistance test tool |
-
2018
- 2018-05-02 CN CN201820648645.XU patent/CN208651012U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113982898A (en) * | 2021-10-15 | 2022-01-28 | 芜湖钻石航空发动机有限公司 | Engine high-pressure oil pump fire resistance test tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190326 Termination date: 20210502 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |