Internal combustion engine glow plug and oil injector sleeve integrated structure

Abstract

The utility model relates to an integrated structure of a glow plug and an oil injector sleeve of an internal combustion engine. The fuel injector sleeve comprises a containing cavity used for arranging a fuel injector and an end wall located on one side of the containing cavity, a center hole is formed in the end wall in a penetrating mode, and at least one through hole is distributed in the end wall along the periphery of the center hole. The mounting sleeve is mounted in the accommodating cavity, and the mounting sleeve comprises an accommodating hole corresponding to the through hole; and the heating body comprises a mounting end and a heating end, the mounting end extends into and is connected with the accommodating hole, and the heating end extends out of the through hole. Due to the integrated design of the glow plug and the fuel injector sleeve, the overall size is effectively reduced, the occupied space is smaller, and the compact layout of the internal combustion engine is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to internal combustion engine technical field especially is a kind of internal combustion engine glow plug and oil atomizer cover integration structure. BACKGROUND

[0002] Internal combustion engine is widely used in various fields of national economy, wherein glow plug is an important component of internal combustion engine. The traditional glow plug is usually composed of ceramic body, copper sleeve and stainless steel sleeve, which occupies a large volume when installed. With the continuous development of internal combustion engine technology, the volume of glow plug is gradually reduced to reduce its heating effect on the oil atomizer nozzle, thereby improving the fuel utilization efficiency.

[0003] In the prior art, the glow plug and the oil atomizer cover are arranged separately and independently, which occupies a large space. At the same time, the glow plug has a significant heating effect on the oil atomizer nozzle, thereby reducing the fuel utilization efficiency. For example:

[0004] Patent CN211715237U discloses a rapid fuel atomization device for a spark-ignited heavy oil piston engine, which includes a scavenging passage cover, a fuel nozzle, a ceramic glow plug, a metal sleeve, and a nozzle accessory. The scavenging passage in this structure is designed according to the specific scavenging passage structure of a two-stroke engine. The fuel nozzle and the glow plug are both market shelf products. The nozzle accessory includes a fuel nozzle cap and a screw, which is used to fix the fuel nozzle. However, this patent still has the problem that the preheating mechanism is not separated from the engine body, which cannot further simplify the structure and reduce the cost.

[0005] Patent CN204226008U discloses a combustion device for diesel engine burning methanol gasoline, which includes a piston, an exhaust passage, a piston pin, a cylinder, a connecting rod, a crank pin, a crankshaft, an exhaust valve, an intake valve, an intake passage, and an oil atomizer. It also includes a vacuum EGR valve and a glow plug. The glow plug is fixed on the top of the cylinder and is in communication with the inside of the cylinder. The glow plug is in close proximity to the oil atomizer. However, this patent still has the problem that the size and shape of the glow plug are not optimized for methanol engines, which cannot further improve the combustion efficiency of the diesel engine.

[0006] Therefore, how to reduce the volume of the glow plug and effectively reduce its heating effect on the oil atomizer nozzle has become a technical problem to be solved. SUMMARY

[0007] Therefore, the utility model solves the problem that the glow plug and the oil atomizer cover are arranged separately and independently in the prior art, which occupies a large volume when used.

[0008] To solve the above technical problems, the utility model provides an internal combustion engine glow plug and oil atomizer cover integration structure, which comprises:

[0009] The oil injector sleeve comprises a containing cavity for arranging an oil injector and an end wall on one side of the containing cavity, a center hole is arranged through the end wall, and at least one through hole is distributed around the center hole;

[0010] The mounting sleeve is arranged in the containing cavity, and the mounting sleeve comprises a containing hole corresponding to the through hole;

[0011] The heating body comprises a mounting end and a heating end, the mounting end is arranged in the containing hole, and the heating end is arranged outside the through hole.

[0012] In an embodiment of the utility model, the outer surface of the mounting sleeve is provided with a heat insulation coating at the position in contact with the oil injector.

[0013] In an embodiment of the utility model, the heat insulation coating comprises a ceramic coating or an aluminum oxide coating.

[0014] In an embodiment of the utility model, the thickness of the heat insulation coating ranges from 50 to 200 microns.

[0015] In an embodiment of the utility model, a plurality of through holes are arranged, and the plurality of through holes are uniformly distributed along the axis of the center hole.

[0016] In an embodiment of the utility model, the mounting sleeve and the oil injector sleeve and the heating body and the mounting sleeve are connected by welding.

[0017] In an embodiment of the utility model, the mounting sleeve is in contact with the inner side of the end wall and / or the inner side wall of the containing cavity.

[0018] In an embodiment of the utility model, one mounting sleeve is arranged, and the mounting sleeve comprises a mounting sleeve hole corresponding to the position of the center hole, and the containing hole is distributed around the mounting sleeve hole; or a plurality of mounting sleeves are arranged, and the plurality of mounting sleeve holes are respectively provided with the containing hole corresponding to the through hole.

[0019] In an embodiment of the utility model, the heating body is a rod-shaped ceramic body and internally arranged with a heating resistor; or the heating body is a U-shaped ceramic body and internally arranged with a heating resistor.

[0020] In an embodiment of the utility model, the material of the mounting sleeve comprises copper, and the material of the oil injector sleeve comprises stainless steel.

[0021] The above technical solution of the utility model has the following advantages compared with the prior art:

[0022] The integrated structure of the electric heating plug and the oil injector sleeve of the internal combustion engine, the integrated design of the electric heating plug and the oil injector sleeve effectively reduces the overall volume, occupies less space, and helps the compact layout of the internal combustion engine. Since the electric heating plug is integrated on the oil injector sleeve, the direct heating effect of the electric heating plug on the oil injector nozzle is reduced, thereby improving the fuel atomization quality and improving the fuel utilization efficiency. At the same time, the electric heating plug is away from the nozzle position, avoiding the adverse effect on the fuel injection process, and further optimizing the combustion efficiency. In addition, the structure realizes the separation of the preheating device and the engine body, which is beneficial to simplify the overall structure and reduce the manufacturing cost. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to make the content of the utility model more easily understood clearly, the following is according to the specific embodiment of the utility model and combines the drawings, and the utility model is further detailed.

[0024] Figure 1 It is the sectional view of the integrated structure of the electric heating plug and the oil injector sleeve of the internal combustion engine of the utility model.

[0025] DESCRIPTION OF DRAWINGS:

[0026] 1, oil injector sleeve;11, containing cavity;12, end wall;13, center hole;14, through hole;

[0027] 2, mounting sleeve;21, containing hole;22, mounting sleeve hole;

[0028] 3, heating body;31, mounting end;32, heating end. DETAILED DESCRIPTION

[0029] The utility model is further described below in combination with the drawings and specific embodiments, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model.

[0030] In the utility model, if the direction (up, down, left, right, front and back) is described, it is only for the convenience of describing the technical scheme of the utility model, and is not indicated or implied that the indicated technical features must have a specific orientation, structure and operation, so it cannot be understood as the limitation of the utility model.

[0031] In the utility model, the meaning of "several" is one or more, the meaning of "multiple" is two or more, "greater than", "less than", "more than" and the like are not included in the number; "above", "below", "within" and the like are included in the number. In the description of the utility model, if "first" and "second" are described, they are only used for distinguishing technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0032] In the utility model, unless otherwise explicitly limited, the words such as "arrange", "install" and "connect" should be understood in a broad sense, for example, can be directly connected, also can be indirectly connected through intermediate medium;Can be fixedly connected, can also be detachably connected, can also be integrally formed;Can be mechanical connection, can also be electrical connection or can communicate with each other;It can be the communication or interaction relationship of two elements inside two elements. The person skilled in the art can determine the specific meaning of the above words in the utility model in combination with the specific content of the technical scheme.

[0033] Referring to Figure 1 The utility model discloses an internal combustion engine electric heat plug and oil atomizer sleeve integration structure, comprising:

[0034] Oil atomizer sleeve 1, including the setting for arranging the containing cavity 11 of oil atomizer and the end wall 12 at one side of containing cavity 11, the center hole 13 is set through on the end wall 12, and at least one through hole 14 is distributed to the end wall 12 along the center hole 13 around;

[0035] Mounting sleeve 2 is installed in containing cavity 11, and the mounting sleeve 2 includes the containing hole 21 corresponding with the through hole 14;

[0036] Heating body 3, including installation end 31 and heating end 32, installation end 31 is inserted and is connected with containing hole 21, and heating end 32 is stretched out outside the through hole 14.

[0037] Through the above-mentioned setting, electric heat plug and oil atomizer sleeve 1 integration design, reduce the overall volume, and the space occupied is smaller when using arrangement, is favorable to the compact design of internal combustion engine. Meanwhile, since electric heat plug is integrated on oil atomizer sleeve 1, the heating influence of electric heat plug to oil atomizer nozzle is reduced, and the utilization efficiency of fuel is improved. And electric heat plug is away from oil atomizer nozzle, avoids the influence to fuel injection, improves combustion efficiency. In addition, the structure realizes the separation of preheating structure and engine body, is favorable to further simplifying structure, reduces cost.

[0038] In one embodiment, the outer surface of the mounting sleeve 2 is provided with a heat insulation coating at the position contacting the oil atomizer. The heat insulation coating includes a ceramic coating or an aluminum oxide coating. Exemplarily, the thickness of the heat insulation coating ranges from 50 to 200 microns.

[0039] It should be noted that the position of the mounting sleeve 2 contacting the fuel injector (nozzle), the heat insulation coating is applied to reduce the thermal load of the fuel injector nozzle caused by the heating of the glow plug. At the same time, due to the cooling water around the fuel injector nozzle and the glow plug, the effect of the glow plug heating on the fuel injector nozzle can be further offset. By the effect of the heat insulation coating and the cooling water, the effect of the glow plug heating on the fuel injector nozzle is reduced, the durability, reliability and service life of the fuel injector are improved, and the working performance of the internal combustion engine is improved.

[0040] In one embodiment, a plurality of through holes 14 are provided, and the plurality of through holes 14 are uniformly distributed along the axis of the central hole 13, and one heating body 3 is correspondingly provided in each through hole 14.

[0041] In one embodiment,

[0042] In one embodiment, the mounting sleeve 2 is provided with one mounting sleeve hole 22 corresponding to the position of the central hole 13, and the mounting sleeve hole 22 is surrounded by the accommodating hole 21. In addition, the mounting sleeve 2 can also be provided with a plurality of mounting sleeves 2, and the plurality of mounting sleeves 2 are circumferentially distributed around the accommodating cavity 11, and the accommodating hole 21 corresponding to the through hole 14 is provided on each of the plurality of mounting sleeves 2.

[0043] In one embodiment, the heating body 3 is a rod-shaped ceramic body and internally provided with a heating resistor body. Alternatively, the heating body 3 is a U-shaped ceramic body and internally provided with a heating resistor body, and the two ends of the U-shaped ceramic body are respectively connected to one mounting sleeve 2.

[0044] In one embodiment, the mounting sleeve 2 and the fuel injector sleeve 1, and the heating body 3 and the mounting sleeve 2 are connected by welding, and the mounting sleeve 2 is in contact with the inner side of the end wall 12 and / or the inner side wall of the accommodating cavity 11 (by welding).

[0045] The material of the mounting sleeve 2 includes copper, and the outer diameter of the copper sleeve is 15-25 mm; the material of the fuel injector sleeve 1 includes stainless steel, and the outer diameter is 20-30 mm; the length of the heating body 3 is 30-50 mm, and the outer diameter is 5-10 mm; the heating resistor body is made of conductive ceramic material, and the resistivity is 0.1-1 ohm·m. Specifically, the welding position of the ceramic body and the copper sleeve is welded by lead welding.

[0046] The structure welds the ceramic body on the copper sleeve by lead welding, welds the copper sleeve in the multiple small holes arranged in the oil sprayer sleeve 1, and makes the ceramic heating end 32 extend out of the oil sprayer sleeve 1, thereby forming an integrated structure of the oil sprayer sleeve 1 and the electric heating plug. The position of the copper sleeve contacting the oil sprayer nozzle is coated with a heat insulation plating layer, thereby reducing the increase of the thermal load of the oil sprayer nozzle caused by the heating of the electric heating plug. Meanwhile, the cooling water around the electric heating plug and the oil sprayer nozzle can further offset the influence of the heating of the electric heating plug on the oil sprayer nozzle.

[0047] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the examples, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. An integrated structure of an electrically heated glow plug and an oil injector sleeve for an internal combustion engine, characterized in that, The application relates to an oil injector sleeve (1) comprising an accommodating cavity (11) for arranging an oil injector and an end wall (12) on one side of the accommodating cavity (11), wherein a central hole (13) is arranged through the end wall (12), and at least one through hole (14) is arranged around the central hole (13); an installation sleeve (2) is arranged in the accommodating cavity (11), wherein the installation sleeve (2) comprises an accommodating hole (21) corresponding to the through hole (14); and a heating body (3) comprising an installation end (31) and a heating end (32), wherein the installation end (31) is arranged in the accommodating hole (21), and the heating end (32) is arranged outside the through hole (14). An insulating coating is arranged on the position where the outer surface of the installation sleeve (2) contacts the oil injector. The insulating coating comprises a ceramic coating or an alumina coating. The thickness of the insulating coating ranges from 50 to 200 microns.

2. An integrated structure of an electrically heated glow plug and an oil injector sleeve for an internal combustion engine according to claim 1, characterized in that, The through hole (14) is arranged in multiple, and the multiple through holes (14) are uniformly arranged along the axis of the central hole (13).

3. The integrated structure of an electrically heated glow plug and an oil injector sleeve for an internal combustion engine according to claim 2, wherein The installation sleeve (2) and the oil injector sleeve (1) and the heating body (3) and the installation sleeve (2) are connected through welding.

4. The integrated structure of an electrically heated glow plug and an oil injector sleeve for an internal combustion engine according to claim 2, wherein The installation sleeve (2) contacts the inner side of the end wall (12) and / or the inner side wall of the accommodating cavity (11).

5. The integrated structure of an electrically heated glow plug and an oil injector sleeve for an internal combustion engine according to claim 1, wherein The installation sleeve (2) is arranged in one, and comprises an installation sleeve hole (22) corresponding to the position of the central hole (13), wherein the installation sleeve hole (22) is arranged around the accommodating hole (21); or the installation sleeve (2) is arranged in multiple, and the multiple installation sleeve holes (22) are respectively arranged with the accommodating holes (21) corresponding to the through holes (14).

6. The integrated structure of an electrically heated glow plug and an oil injector sleeve for an internal combustion engine according to claim 1, wherein The heating body (3) is a rod-shaped ceramic body and is internally arranged with a heating resistor; or the heating body (3) is a U-shaped ceramic body and is internally arranged with a heating resistor.

7. The integrated structure of an electrically heated glow plug and an oil injector sleeve for an internal combustion engine according to claim 1, wherein The material of the installation sleeve (2) comprises copper, and the material of the oil injector sleeve (1) comprises stainless steel.

8. The integrated structure of an electrically heated glow plug and an oil injector sleeve for an internal combustion engine according to claim 1, wherein ​ 9. The integrated structure of an electrically heated glow plug and an oil injector sleeve for an internal combustion engine according to claim 1, wherein ​ 10. The integrated structure of an electrically heated glow plug and an oil injector sleeve for an internal combustion engine according to claim 1, wherein ​

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