CA1163512A - Drain line fitting for fuel injection nozzle - Google Patents
Drain line fitting for fuel injection nozzleInfo
- Publication number
- CA1163512A CA1163512A CA000385744A CA385744A CA1163512A CA 1163512 A CA1163512 A CA 1163512A CA 000385744 A CA000385744 A CA 000385744A CA 385744 A CA385744 A CA 385744A CA 1163512 A CA1163512 A CA 1163512A
- Authority
- CA
- Canada
- Prior art keywords
- fuel injection
- injection nozzle
- seal
- drain line
- facing
- 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
Links
Landscapes
- Fuel-Injection Apparatus (AREA)
Abstract
?RAIN LINE FITTING FOR FUEL INJECTION NOZZLE
ABSTRACT OF THE DISCLOSURE
A fuel injection nozzle drain line fitting for connecting the fuel injection nozzle to the drain line manifold in a fuel injection system.
ABSTRACT OF THE DISCLOSURE
A fuel injection nozzle drain line fitting for connecting the fuel injection nozzle to the drain line manifold in a fuel injection system.
Description
63~2 DRAIN LINE FITTING FOR FUEL INJECTION NOZZLE
This invention relates to a fuel injection nozzle and more particularly to a fuel injection noæzle fitting for connecting the fuel injection nozzle to the drain line manifold for returning excess fuel to the fuel supply in a fuel injection system.
Conventionally, fuel injection nozzles are provided wi~h fuel by way of a fuel supply line from the fuel tank with a transfer pump to deliver fuel to the fuel injection pump. Fuel is injected into the combustion chamber at high pressures by the fuel injection pump via înjection lines and the injection nozzles. During the process of fuel injection leakage is incurred and any leakage to the backside of the differential valve is returned to the fuel supply. Accordingly, the drain line from each fuel injection nozzle is in communication with a fuel line manifold which in turn returns the excess fuel to the fuel supply. Metal tubing was often used for drain lines. The connecting of the tubes to the fuel injection nozzle was done with a banjo fitting with a screw and washers for seals. The fittings were then brazed to tubing to form the manifold. This installation was costly and time consuming.
Accordingly, the applicant's invention provides for an easily installed fitting connecting the fuel injection nozzle to the drain line for returning excess fuel from the fuel iniection nozzle to the fuel supply.
The V.S. patent 3,596,507, Oshima et al, illustrates an incidental showing of a drain line fitting of fuel injection nozzle. The applicant's invention provides for easily assembled components of the fitting which can be readily fitted to a fuel injection nozzle and drain line manifold without creating a stress or strain on the fitting or tubing by easily aligning the fitting relative to the related components.
~3~
Accordingly, it is an object of this invention to ~rovide a drain line fitting for connecting the f~el injection nozzle to the drain line in a f~el injection system.
It is another object of this invention to rovide a drain line fitting having "~" ring seals which can be readily connected to the fuel injection noæzle.
It is a further o~ject of this invention to ~rovide a fuel injection system having a drain line using a fi~ting in which a lock nut and seal readily seal the fitting with the f~el injection nozzle and a second lock nut and seal to seal the drain line tubing with the fitting by fixing the lock nut when the fitting is positioned to its operating ~osition.
The objects of this invention are accomFlished by using a fitting in the fuel injection nozzle drain line wherein a lock nut, seal retainer, and a seal are tightened so that the seal slightly engages a s~otface on the fuel injection nozzle. The fitting is then aligned 2Q with a ~etal drain line tube, which is Fre-for~ed, received within the cylindrical o~ening in the ~ody of the fitting. The lock nut and seal are tightened to for~ a positive seal between the fitting and the drain line tu~e.
Ihe lock nut, the seal retainer, and seal are then firmly tightened and the asse~bly of the drain line fitting is com;clete.
Peferring to the drawings, the ~referred embodiment of this invention is illustrated.
Fig. 1 illustrates a cross section view of the fitting for connecting the fuel injection nozzle with the drain line;
Fig. 2 is a side elevation view ~artially in section showing the assembly of the fitting with the fuel injection nozzle;
Fig. 3 is an end view of the fitting in the fuel injection nozzle; and ~3S~2 - Fig. 4 is an assembly view showing the fuel injection nozzle, the drain line fitting assembled on the internal combustion engine.
The fitting 1 is formed with a body 2 defining a connecting passage 3. The connecting passage 3 is in communication with the nozzle opening 4 and the drain line openiny 5. The drain line opening 5 receives the drain line tube 6. A lock nut 7 threadedly engages the threaded periphery 8 and deforms the seal 9 to form a seal between the tube 6 and the fitting 1.
The fuel injection nozzle end 11 has a threaded outer periphery 12 which threadedly engages the inner periphery of opening 13 in the fuel injection nozzle 14.
The fuel injection nozzle opening 4 of the body receives the cylindrical end 15 of the sleeve connector 16. The cylindrical end 15 is brazed in the body 2 of the fitting.
The threaded portion 18 o~ the sleeve connector 16 threadedly engages a threaded inner periphery 19 of the lock nut 20. A seal retainer 21 is formed with a beveled surface 22 which carries an "O" ring seal 23. As the lock nut 20 is turned to carry the seal retainer 21 and "O"
ring seal 23 toward the fuel injection nozzle, the seal engages a counterbored spotface 24 to form a seal between the drain line fitting and the fuel injection nozzle 14.
The "O" ring 22 also forms a seal with a cylindrical surface 25 intermediate the threaded portion 11 and the threaded portion 18. The cylindrical s~rface allows the "O" ring to move axially on the sleeve connector as the lock nu~ 20 is tightened and the seal retainer is biased toward the fuel injection nozzle.
The body 2 is formed of a hexagon head configuration so that it may be firmly held while tightening the lock nuts for connection of the fitting with the fuel injection no~zle and the drain tube 6. Fig.
4 shows the assembly of the drain line fitting 1 on the fuel injection nozzle 14 of an internal combustion engine 27. The drain line tube 6 returns fuel to the fuel injection drain line manifold of the engine. The fuel ~35~2 supply line 28 is connected to the fuel injection nozzle 14 and is normally supplied with pressurized fluid to periodically provide fuel injection to the combustion chamber 29 in the engine 27. The nozzle holder is 5 fastened by suitable fastening means to the engine.
The drain line fitting l is readily fastened to the fuel injection nozzle 14 by threading the sleeve connector 16 in the nozzle opening 13. The sleeve connector 16 is tightened to hold its position in the lOnozzle 14. The lock nut 20 is then tightened which carries the seal retainer 21 and seal 23 until the retainer cup slightly engages the spotface 24. The tube 6 is then inserted in the cylindrical drain line opening 5 and the lock nut 8 carrying the seal 9 is then fastened 15snugly to form a seal between the tube 6 and the body 2 of the drain line fitting l. Then the lock nut 20 is firmly tiyhtened carrying the seal retainer 21 and the seal 23 in firm engagement with the spotface 24 of the fuel injection nozzle 14.
This provides a convenient and quickly attachable drain line connection between the fuel injection nozzle and the fuel drain line. The fitting provides a stress free connection between the nozzle and the drain line as well as easily serviceable.
This invention relates to a fuel injection nozzle and more particularly to a fuel injection noæzle fitting for connecting the fuel injection nozzle to the drain line manifold for returning excess fuel to the fuel supply in a fuel injection system.
Conventionally, fuel injection nozzles are provided wi~h fuel by way of a fuel supply line from the fuel tank with a transfer pump to deliver fuel to the fuel injection pump. Fuel is injected into the combustion chamber at high pressures by the fuel injection pump via înjection lines and the injection nozzles. During the process of fuel injection leakage is incurred and any leakage to the backside of the differential valve is returned to the fuel supply. Accordingly, the drain line from each fuel injection nozzle is in communication with a fuel line manifold which in turn returns the excess fuel to the fuel supply. Metal tubing was often used for drain lines. The connecting of the tubes to the fuel injection nozzle was done with a banjo fitting with a screw and washers for seals. The fittings were then brazed to tubing to form the manifold. This installation was costly and time consuming.
Accordingly, the applicant's invention provides for an easily installed fitting connecting the fuel injection nozzle to the drain line for returning excess fuel from the fuel iniection nozzle to the fuel supply.
The V.S. patent 3,596,507, Oshima et al, illustrates an incidental showing of a drain line fitting of fuel injection nozzle. The applicant's invention provides for easily assembled components of the fitting which can be readily fitted to a fuel injection nozzle and drain line manifold without creating a stress or strain on the fitting or tubing by easily aligning the fitting relative to the related components.
~3~
Accordingly, it is an object of this invention to ~rovide a drain line fitting for connecting the f~el injection nozzle to the drain line in a f~el injection system.
It is another object of this invention to rovide a drain line fitting having "~" ring seals which can be readily connected to the fuel injection noæzle.
It is a further o~ject of this invention to ~rovide a fuel injection system having a drain line using a fi~ting in which a lock nut and seal readily seal the fitting with the f~el injection nozzle and a second lock nut and seal to seal the drain line tubing with the fitting by fixing the lock nut when the fitting is positioned to its operating ~osition.
The objects of this invention are accomFlished by using a fitting in the fuel injection nozzle drain line wherein a lock nut, seal retainer, and a seal are tightened so that the seal slightly engages a s~otface on the fuel injection nozzle. The fitting is then aligned 2Q with a ~etal drain line tube, which is Fre-for~ed, received within the cylindrical o~ening in the ~ody of the fitting. The lock nut and seal are tightened to for~ a positive seal between the fitting and the drain line tu~e.
Ihe lock nut, the seal retainer, and seal are then firmly tightened and the asse~bly of the drain line fitting is com;clete.
Peferring to the drawings, the ~referred embodiment of this invention is illustrated.
Fig. 1 illustrates a cross section view of the fitting for connecting the fuel injection nozzle with the drain line;
Fig. 2 is a side elevation view ~artially in section showing the assembly of the fitting with the fuel injection nozzle;
Fig. 3 is an end view of the fitting in the fuel injection nozzle; and ~3S~2 - Fig. 4 is an assembly view showing the fuel injection nozzle, the drain line fitting assembled on the internal combustion engine.
The fitting 1 is formed with a body 2 defining a connecting passage 3. The connecting passage 3 is in communication with the nozzle opening 4 and the drain line openiny 5. The drain line opening 5 receives the drain line tube 6. A lock nut 7 threadedly engages the threaded periphery 8 and deforms the seal 9 to form a seal between the tube 6 and the fitting 1.
The fuel injection nozzle end 11 has a threaded outer periphery 12 which threadedly engages the inner periphery of opening 13 in the fuel injection nozzle 14.
The fuel injection nozzle opening 4 of the body receives the cylindrical end 15 of the sleeve connector 16. The cylindrical end 15 is brazed in the body 2 of the fitting.
The threaded portion 18 o~ the sleeve connector 16 threadedly engages a threaded inner periphery 19 of the lock nut 20. A seal retainer 21 is formed with a beveled surface 22 which carries an "O" ring seal 23. As the lock nut 20 is turned to carry the seal retainer 21 and "O"
ring seal 23 toward the fuel injection nozzle, the seal engages a counterbored spotface 24 to form a seal between the drain line fitting and the fuel injection nozzle 14.
The "O" ring 22 also forms a seal with a cylindrical surface 25 intermediate the threaded portion 11 and the threaded portion 18. The cylindrical s~rface allows the "O" ring to move axially on the sleeve connector as the lock nu~ 20 is tightened and the seal retainer is biased toward the fuel injection nozzle.
The body 2 is formed of a hexagon head configuration so that it may be firmly held while tightening the lock nuts for connection of the fitting with the fuel injection no~zle and the drain tube 6. Fig.
4 shows the assembly of the drain line fitting 1 on the fuel injection nozzle 14 of an internal combustion engine 27. The drain line tube 6 returns fuel to the fuel injection drain line manifold of the engine. The fuel ~35~2 supply line 28 is connected to the fuel injection nozzle 14 and is normally supplied with pressurized fluid to periodically provide fuel injection to the combustion chamber 29 in the engine 27. The nozzle holder is 5 fastened by suitable fastening means to the engine.
The drain line fitting l is readily fastened to the fuel injection nozzle 14 by threading the sleeve connector 16 in the nozzle opening 13. The sleeve connector 16 is tightened to hold its position in the lOnozzle 14. The lock nut 20 is then tightened which carries the seal retainer 21 and seal 23 until the retainer cup slightly engages the spotface 24. The tube 6 is then inserted in the cylindrical drain line opening 5 and the lock nut 8 carrying the seal 9 is then fastened 15snugly to form a seal between the tube 6 and the body 2 of the drain line fitting l. Then the lock nut 20 is firmly tiyhtened carrying the seal retainer 21 and the seal 23 in firm engagement with the spotface 24 of the fuel injection nozzle 14.
This provides a convenient and quickly attachable drain line connection between the fuel injection nozzle and the fuel drain line. The fitting provides a stress free connection between the nozzle and the drain line as well as easily serviceable.
Claims (10)
1. A drain line fitting for a fuel injection nozzle comprising, a body defining passage means connected between a sleeve connector opening and a drain tube opening, a threaded sleeve connector forming passage means received within said sleeve connector opening of said body, means defining a cylindrical facing intermediate threaded end portions of said sleeve connector, a seal embracing said cylindrical facing, a fuel injection nozzle defining a seal facing and a threaded opening, said sleeve connector threadedly received in said threaded opening of said fuel injection nozzle, a seal retainer receiving said sleeve connector and having a larger inner cylindrical diameter than said cylindrical facing and defining a beveled facing engaging said seal, said seal and said seal retainer engaging said seal facing of said nozzle, a lock nut threadedly engaging the said sleeve connector biasing said seal retainer and seal to a sealed position with said seal engaging said facing on said fuel injection nozzle and said cylindrical facing on said sleeve connector allowing said body and said fuel injection nozzle to be angularly preset to any relative position, a drain tube received in the drain tube opening of said body, means defining a threaded periphery on said body surrounding the outer periphery of said drain tube opening, a sleeve lock nut threadedly engaging the outer periphery of said body carrying a seal for sealing said drain tube and said body in any desired angular relative position when tightened on said threaded portion of said body to thereby provide a seal between said body and said drain tube, said fitting thereby providing relative angular adjustment with automatic sealing for fitting to a fuel injection nozzle and drain line in any position.
2. A drain line fitting for a fuel injection nozzle as set forth in claim 1 wherein said body defines a hexagonal head.
3. A drain line fitting for a fuel injection nozzle as set forth in claim 1 wherein said seal facing forms a radial facing on said fuel injection nozzle.
4. A drain line fitting for a fuel injection nozzle as set forth in claim 1 wherein said seal facing on said fuel injection nozzle defines a radial countersunk facing for engaging said seal in said seal retainer.
5. A drain line fitting for a fuel injection nozzle as set forth in claim 1 including a brazing means connecting said sleeve connector to said body.
6. A drain line fitting for a fuel injection nozzle as set forth in claim 1 wherein said seal in said sleeve lock nut defines a "C" ring seal.
7. A drain line fitting for a fuel injection nozzle as set forth in claim 1 wherein said drain tube opening defines a cylindrical opening, said drain tube received in said opening.
8. A drain line fitting for a fuel injection nozzle as set forth in claim 1 wherein said fitting defines an elbow structure.
9. A drain line fitting for a fuel injection nozzle as set forth in claim 1 wherein said fixture defines a ninety degree elbow.
10. A drain line fitting for a fuel injection nozzle as set forth in claim 1 wherein said seal retainer defines an opening slightly larger than the threaded sleeve connector.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US22203381A | 1981-01-02 | 1981-01-02 | |
| US222,033 | 1981-01-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1163512A true CA1163512A (en) | 1984-03-13 |
Family
ID=22830488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000385744A Expired CA1163512A (en) | 1981-01-02 | 1981-09-11 | Drain line fitting for fuel injection nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1163512A (en) |
-
1981
- 1981-09-11 CA CA000385744A patent/CA1163512A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |