JP3035565U - Fuel nozzle fixing device - Google Patents

Abstract

(57) Abstract: [PROBLEMS] To provide a fuel nozzle fixing device capable of increasing efficiency of engine output and reducing harmful components in waste air. Kind Code: A1 A fuel nozzle fixing device having a double injection beam in a kind of internal combustion engine, the mechanism of which is one fuel guide rail 2, a plurality of cup-shaped lids 21 and at least one connecting rod. It is composed of 5. The connecting rod 5 has a lever 51 on which at least two fixing holes are provided.
There are 52, and there are hook pawls 521 on the fixing holes 52, and they are fitted with the bottom edge 351 of the nozzle 3, respectively.
Prevents 3 axial rotation. On the cup-shaped lid 21, one backing flat plate 211 is carried on the back and presses the first O-type ring 4a. The connecting rod 5 is also provided with a spring washer 6, which presses the nozzle base 15 of the cylinder head 1 to prevent the nozzle 3 from being displaced in the axial direction.
Also has a dustproof effect.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 INDUSTRIAL APPLICABILITY The present invention is applied to a fixing device for a fuel nozzle having a double injection beam in an internal combustion engine, and mainly prevents axial displacement and axial rotation of the nozzle.

[0002]

[Prior art]

 At present, the design principles of internal combustion engines in many countries around the world are oriented toward a policy of low environmental pollution, with high combustion power and high combustion efficiency, complete combustion and low consumption rate. Therefore, in order to meet this demand, the design of the fuel system of the gasoline engine has been switched from the past single-point injection oil to the direction of multi-point injection oil, and the overall output efficiency of the engine can be improved by updating the ignition system. I am measuring. Therefore, the structure of the fuel nozzle has changed from the conventional single type to the multiple type of dual injection beam nowadays. That is, two jet outlets are provided on the jet surface of one nozzle, and at the same time, fuel is injected into the two intake passages to mix the fuel and air, thereby satisfying the above-mentioned demand.

However, in the operation of the fuel nozzle having the multi-gate mechanism and the double (or double or more) injection beam, the operation cooperation between the air intake valve and the injection of the fuel beam can be properly achieved. Without it, the amount of mixed gas sent to the cylinder cannot be stabilized. Therefore, the adjustment of the position of the nozzle having the double jet beam is extremely important. In Figures 7 and 8, when the nozzle with the dual injection beam is displaced a little from its exact position, the fuel will hit the wall of the airway regardless of whether it is radial or axial rotation. Wet the walls, reducing the amount of fuel entering the cylinder, resulting in power loss, and incomplete combustion increasing the amount of harmful substances in the exhaust air and causing environmental pollution.

Therefore, as shown in FIGS. 1 and 2, the present fixing mechanism of the fuel nozzle having the double injection beam is a nozzle base at a proper position beside the cylinder head 1a and the air intake path 11a. 2a is provided, and the nozzle 3a is placed inside it. The second O-type ring 4b is fitted into the jet end 31a of the nozzle, and a plurality of cup-shaped lids 51a are provided at the lower end of the fuel guide rail 5a, and the cup-shaped lids 51a are respectively covered on the nozzles 3a. The suction end 32a of the nozzle is covered with a first O-shaped ring 4a, which is also connected to the cup-shaped lid 51a of the fuel guide rail 5a to prevent the nozzle 3a from being displaced in the radial direction. In addition, rotation prevention 6a is provided on the side surface of the fuel guide rail 5a. The anti-rotation 6a straddles the body 33a of the connecting terminal protruding above the nozzle 3a or is fitted directly to prevent the nozzle 3a from rotating in the axial direction due to some external force. As described above, the first O-type ring 4a and the second O-type ring 4b are used for the fixing mechanism of the fuel nozzle 3a having the conventional double injection beam, so that the nozzle 3a is prevented from being displaced in the radial direction and prevented from rotating. 6a is used to prevent the nozzle 3a from rotating in the axial direction.

[0005]

[Problems to be solved by the device]

 However, the above device has the following drawbacks to be considered. 1. The nozzle 3a uses the first O-shaped ring 4a and the second O-shaped ring 4b to prevent radial displacement of the nozzle 3a, but lacks a preventive measure against axial rotation. There is. When the nozzle 3a receives some axial rotational force, the nozzle 3a easily tilts to cause the above fuel to wet the airway wall, reducing the amount of oil entering the cylinder 1a and causing power loss. However, incomplete combustion increases the amount of harmful substances in the waste and causes environmental pollution, which also reduces the efficiency of the engine. 2. The nozzle base 2a has no dustproof facility, and dust is likely to accumulate. However, if the ejection end 32a of the nozzle 3a and the second O-type ring 4b are worn and require maintenance or replacement, dust may enter the intake port 11a and the combustion chamber 12a, causing combustion failure and wear of the equipment. . 3. When assembling the fuel nozzle 3a, the fuel guide rail 5a, the nozzle base 2a, etc., insert the suction end 32a of the nozzle 3a into the cup-shaped lid 51a below the fuel guide rail 5a, and then insert the nozzle 3a into the cup-shaped lid 51a. The ejection end is inserted into the nozzle base 2a. Then, the rotation prevention 6a is fitted between the nozzle 3a and the frame 33a of the connecting terminal protruding on the side surface thereof. This can prevent the nozzle 3a from rotating in the axial direction, but the procedure is troublesome. 4. If the material of the rotation prevention 6a provided near the fuel guide rail 5a is steel, it is fixed by welding to the fuel guide rail 5a formed of an iron plate. However, if the guide rail 5a is made of aluminum alloy or plastic, this is not applicable, and therefore the rotation prevention 6a made of a material compatible with it must be manufactured. This increases production costs and reduces market competitiveness.

In order to make up for the above drawbacks, the present inventor has developed a kind of improved fuel nozzle fixing device having a dual injection beam in an internal combustion engine as a result of many years of strenuous research. The present invention effectively solves the drawbacks of the prior art, that is, the misalignment of the nozzle in the axial and radial directions, the rotation in the axial direction, and the conventional problems in manufacturing and maintenance. The main object of the present invention is to limit the axial improper rotation of a fuel nozzle having a double injection beam, and to quickly complete a combination of fuel guide rails made of different materials.

Another object of the present invention is to limit axial misalignment of a fuel nozzle having a double injection beam and also contribute to dust prevention.

[0008]

[Means for Solving the Problems]

 In order to prevent the axial rotation of the fuel nozzle having the double injection beam and fix it, and to quickly assemble the fuel guide rails made of different materials, in the present invention, a plurality of rods are provided with a single rod. Nozzles are connected, and the nozzles that are fitted to each other are fixed at appropriate positions based on the mutual relationship between the nozzles to prevent improper rotation in the axial direction, and as a result, fuel guide rails made of different materials can be quickly assembled. be able to.

With respect to the axial displacement of the nozzle and the prevention of dust, in the present invention, the first O-shaped ring of the nozzle is provided on the back side of the cup-shaped lid on the fuel guide rail, and the first O-shaped ring is provided. Use a spring washer to hold both ends of the nozzle base on the cylinder head to prevent the nozzle from shifting in the axial direction. The spring washer holds down the nozzle base on the cylinder head, and thus also has a dustproof effect. Spring washers are usually made of oil resistant rubber to absorb vibrations during cylinder operation and also prevent damage caused by mutual collision of parts.

[0010]

[Embodiment of the invention]

 Hereinafter, various parts constituting the fuel nozzle fixing device of the present invention will be described in detail. Please refer to FIGS. What is included in one cylinder head 1 is one combustion chamber 11, and one intake port base 12 and intake port 13 (see FIGS. 6 and 7) at the upper end thereof. One nozzle base 15 is provided at a suitable position on the inner wall side of the intake passage 14 so as to penetrate the intake passage 14.

The cross section of one fuel guide rail 2 has a rectangular shape (other shapes, for example, a circular shape may be used), and is a fuel transport pipe. A cup-shaped lid 21 is provided on its lower surface, which is perpendicular to the nozzle base 15 of the cylinder head 1. On the bottom edge of the cup-shaped lid 21, one backing flat plate 211 is carried in a protruding shape. The pair of nozzles 3 is installed between the nozzle base 15 and the fuel guide rail 2, and the body 31 has a cylindrical shape, and the upper part thereof is one slanting protrusion that is brought into contact with the thin tubular oil absorption end 32. The connection terminal 33 formed of a skeleton is attached to a position where the cylindrical skeleton 31 of the nozzle and the oil absorbing end 32 are in contact with each other. The lower part of the cylindrical body 31 is in contact with one short tubular spray oil end 34, and has at least one bottom edge 351 (two horizontal bottom edges in FIGS. 3, 4 and 5) above it. A columnar body 35 is provided. A first O-type ring 4a and a second O-type ring 4b are fitted in the oil suction end 32 and the spray oil end 34 of the nozzle 3, respectively, and the spray oil surface (not shown) of the spray oil end 34 of the nozzle is shown. There are at least two spray ports (not shown) on each of the above.

One flat and long connecting rod 5 has a plurality of fixing holes 52 in its lever 51 for fixing a plurality of positions (FIGS. 3, 4 and 5 show ring washer 53 at both ends of the lever 51. 52 are provided, and there are three fixing holes 52 on the lever 51 in FIG. 9), and at least one hooking pawl 521 is provided in the fixing hole 52 in combination with the bottom edge 351 of the nozzle 3. Has been. At least one of the spring washers 6 added to or fitted on the ring washer 53 is made of an oil-resistant rubber material, and in this embodiment, springs are formed on both side surfaces 531 and 532 of the ring washer 53, respectively. A washer 6 is added. The hooking pawls 521 of the position fixing holes 52 are fitted in the bottom edges 351 of the oil spray ends 34 of the nozzles 3, respectively. The nozzle 3 is fixed in the fixing hole 52 of the connecting rod 5 by the close mutual contact between the hook pawl 521 and the bottom edge 351 and does not rotate freely. In addition, the oil absorption end 32 of the nozzle 3 into which the first O-shaped ring 4a is fitted and the cup-shaped lid 21 below the fuel guide rail 2 are connected to each other, and the second O fitted into the oil end 34 of the nozzle 3 is fitted. The die ring 4b and the nozzle base 15 of the cylinder head 1 are connected to each other to limit the radial displacement of the nozzle 3. Further, the first O-type ring 4a of the nozzle 3 strongly presses the backpacking flat plate 211 attached to the bottom edge of the cup-shaped lid 21, and a rubber washer attached to the connecting rod 5 covering the oil spray end 34 of the nozzle 3. 6 has an effect of strongly pressing the nozzle base 15 to prevent axial displacement of the nozzle 3. Others Since the rubber washer 6 covers the nozzle base 15, it also has a dustproof effect.

Also, FIGS. 7 and 8 are structural diagrams that correlate with the fuel nozzle 3 having a dual injection beam according to the present invention, the dual intake passage 14 and the intake base 12, and as can be clearly seen, the intake base is shown. When the intake port 13 at the seat 12 is opened, the fuel ejected from the nozzle 3 becomes two bundles of fuel injection beam 7, and the fuel and air are mixed through the double intake passage 14 of the cross shape. After that, it is directly injected into the combustion chamber 11 and ignited and burned. Therefore, whether or not the positional relationship between the two fuel injection beams 7 of the nozzle 3 and the intake port base 12 is appropriate depends on the amount of fuel sucked into the cylinder 1, the output, the efficiency, and the exhaust gas discharged. It affects the quality of the product. According to the present invention, displacement of the nozzle 3 in the radial and axial directions, axial rotation, etc. are prevented, and the nozzle 3 is fixed and ejected at the correct position.

[0014] Taking the present step a step further, the improvement advantage added to the structure of the mechanism by the present invention will be explained. 1. According to the present invention, the first O-type ring 4a and the second O-type ring 4b for sealing which cover the oil suction end 32 and the oil spray end 34 of the nozzle 3 prevent the displacement of the nozzle 3 in the radial direction. In addition to the above effect, the back Oval plate 211 attached to the bottom edge of the cup-shaped lid 21 is strongly pressed by the first O-shaped ring 4a on the nozzle 3 to cover the jet oil end 34 of the nozzle 3. The rubber washer 6 added to the connecting rod 5 has an effect of strongly pressing the nozzle base 15 to prevent the nozzle 3 from being displaced in the axial direction. Others The bottom edge 351 of the nozzle 3 is connected to the hooking pawl 521 of the connecting rod 5, and the nozzle 3 is fixed in the connecting rod 5 fixing hole 52 by the close contact between the two, and its radial direction and axial direction are fixed. It prevents movement and axial rotation due to external force at the nozzle, secures the accurate position of the nozzle 3, supplies a normal amount of fuel oil to the combustion chamber 11 and completely burns it, improving the output effect and eliminating harmful waste. Reduces the generation of qi. 2. According to the present invention, the rubber washer 6 added to the connecting rod 5 is put on the nozzle base 15 to obtain a dustproof effect. Further, when the second O-type ring 4b of the oil end 34 of the nozzle 3 is replaced after being worn or for maintenance, dust is effectively prevented from entering the intake passage 14 and the combustion chamber 11 to extend the life of the device. Extend it. 3. According to the present invention, the nozzle 3 and the fuel guide rail 2, the nozzle base 15 and the like are assembled and mixed with each other by fixing the two nozzles 3 at the same time by using the fixing holes 52 of the connecting rod 5. The oil absorption ends 32 of the two nozzles 3 are simultaneously put in the two cup-shaped lids 21 below the fuel guide rail 2, and the fuel oil ends 34 of the two nozzles 3 are connected to each other. Insert the rod 5 into the nozzle base 15. This completes the assembly work. The assembly process is simple and convenient, and at the same time, it is possible to assemble a nozzle 3 having two double jet beams. Its efficiency is twice that of the conventional one, the number of parts is greatly reduced, and the full economic effect is achieved. 4. According to the present invention, the coordinated design between the connecting rod 5 and the nozzle 3 cleverly fixes the nozzle 3 in the fixing hole 52 of the connecting rod 5 to suppress its rotation, preventing the conventional rotation. Succeeded to replace the bowl. Moreover, there are no restrictions on the materials used and it can be applied to any situation, and it will greatly contribute to the reduction of production costs and the improvement of sales competitiveness.

The above description only deals with a relatively good embodiment of the present invention, and does not mean that the structure and device of the present invention stop to this extent. In actual application, a person skilled in this way can change or modify many small parts or replace parts by using the idea of the present invention as a hint. For example, if there are two or more fixing holes for the connecting rod, connect two or more nozzles 3 (see FIG. 9), or if the catch pawl 521 of the connecting rod 5 and the bottom edge 351 of the nozzle 3 have a single cut surface, a multi-sided surface. It is also possible for it to be in the form of a faceted or keyed slot. The rubber washer may be molded integrally with the connecting rod 5 or may be manufactured separately. It is appropriate that these are included in the present invention.

[0016]

[Effect of the invention]

 According to the above description, the present invention connects fuel nozzles having multiple double injection beams with only one connecting rod, and fixes the nozzle by utilizing the mutual connection relationship with these nozzles. To prevent its axial rotation. It can also be quickly assembled with fuel guide rails made of different materials, and the back Oval plate attached to the cup-shaped lid on the guide rail holds down the first O-shaped ring of the nozzle, and also the connecting rod. The upper spring washer strongly presses against both ends of the nozzle base of the cylinder head to prevent the nozzle from moving axially. Since the spring washer covers the nozzle base of the cylinder head, it also has a dustproof effect. Disassembling and reassembling for maintenance is convenient, the production cost is reduced, and the economic effect is high.

[Brief description of the drawings]

FIG. 1 is an assembled three-dimensional view of a conventional fuel nozzle having a dual injection beam and a fuel guide rail.

FIG. 2 is a configuration diagram of a conventional fuel nozzle having a dual injection beam, a fuel guide rail, and a cylinder head.

FIG. 3 is a view showing an embodiment according to the present invention.

FIG. 4 is a local configuration diagram of an embodiment according to the present invention.

FIG. 5 is an assembly configuration diagram according to an embodiment of the present invention.

FIG. 6 is a detailed configuration diagram of a connecting rod, a spring washer, and a back plate according to an embodiment of the present invention.

FIG. 7 is a configuration diagram of a fuel nozzle having a dual injection beam and its dual intake passage according to an embodiment of the present invention.

FIG. 8 is a configuration diagram of a fuel nozzle having a dual injection beam, an intake passage, and an intake base according to an embodiment of the present invention.

FIG. 9 is a view showing another embodiment according to the present invention.

[Explanation of symbols]

 1 Cylinder head 11 Combustion chamber 12 Intake port base 13 Inlet port 14 Intake passage 15 Nozzle base 2 Fuel guide rail 21 Cup lid 211 Back plate 3 Nozzle 31 Body 32 Intake end 33 Connection terminal 34 Spray oil end 35 Cylindrical body 351 Bottom edge 5 Continuous rod 51 Lever 52 Fixing hole 521 Hooking pawl 53 Ring washer 531 Ring washer side 532 Ring washer side 6 Rubber washer (Spring washer) 7 Fuel injection beam

Claims (4)

[Utility model registration claims] 1. A fixing device for a fuel nozzle having a dual injection beam in an internal combustion engine, comprising a single fuel guide rail and a plurality of hollow cup-shaped lids respectively connected to the fuel guide rail. And a fuel nozzle having a plurality of columnar dual injection beams, each injection surface of the fuel nozzle having at least two ejection ports, and having a dual injection beam approaching the ejection surface. A second O-shaped ring is fastened to the ejection end of the fuel nozzle, and at least one bottom edge is provided outside the ejection end of the fuel nozzle, and one second O-ring is provided on the suction end of the fuel nozzle. Three first O-rings are provided and are fitted into the cup-shaped lid, and one connecting terminal is obliquely attached to the suction end of the fuel nozzle, and there is at least one flat long connecting rod. One for that There is at least two fixing holes for position calibration on the lever, at least one hooking pawl is provided in the fixing hole, and the double injection beam composed of the above parts is provided. The fuel nozzle fixing device is characterized in that the rotation of the fuel nozzle in the axial direction is restricted by the connecting rod. 2. A first O-shaped ring is supported on the cup-shaped lid by means of a negative plate, and at least two ring washers are provided on the connecting rod, and the ring-shaped washer is installed on the washer. 2. The fuel nozzle fixing device according to claim 1, wherein at least one spring washer presses the nozzle base in the cylinder head to prevent the displacement of the nozzle in the axial direction. 3. The fuel nozzle fixing device according to claim 2, wherein the lever is fitted in the spring washer. 4. The fuel nozzle fixing device according to claim 2, wherein the material of the spring washer is rubber.