Lateral oil inlet device capable of adjusting protruding height of nozzle of oil sprayer

Abstract

The invention provides an oil injector nozzle protrusion height adjustable lateral oil inlet device which comprises an oil injector, the oil injector is arranged in an oil injector hole formed in a cylinder cover through a first pressing sleeve, and an adjusting gasket is arranged at the bottom of the oil injector so as to form an annular sealing belt for sealing the bottom of the oil injector; the mounting base is correspondingly arranged at an oil inlet rod hole formed in the side face of the cylinder cover, an assembly hole corresponding to the oil inlet rod hole is formed in the mounting base, and the oil inlet rod hole is obliquely formed and communicates with the oil sprayer hole; the oil inlet rod is arranged in the assembly hole through a second pressing sleeve and obliquely penetrates into the oil inlet rod hole, and an oil inlet channel is formed in the oil inlet rod. The projection height of the nozzle of the oil injector of the same cylinder cover can be adjusted to match with different combustion chambers to perform single-cylinder engine combustion performance tests, the test cost of the single-cylinder engine combustion performance tests is reduced, and the test efficiency is improved at the same time.

Description

Technical Field

[0001] The present application belongs to the technical field of engine combustion performance testing, and in particular relates to a lateral oil inlet device with adjustable protruding height of an injector nozzle. Background Art

[0002] At present, mainstream engine research and development mostly adopts the "three-level system" development process, that is, the "component level-single cylinder level-whole machine level" progressive development and design. As one of the indispensable links in the development and design of the whole engine, the single-cylinder engine test platform can match, optimize and verify the combustion performance of the whole machine under the premise of achieving a small cost investment in the whole machine development process. When the single-cylinder test platform adopts the side oil inlet method, the injector often has the phenomenon of the injector oil inlet hole position being higher or lower than the design value due to the difference in the compression of the injector adjustment pad during the actual installation process. Since the position of the lateral oil inlet rod hole of the cylinder head is fixed, the upper and lower deviations of the injector oil inlet hole position lead to the failure to form a good sealing surface between the injector oil inlet hole and the oil inlet rod. Fuel leakage is prone to occur in the high pressure and vibration environment of the test, and leakage is not easy to be found.

[0003] In addition, during the combustion performance test of a single-cylinder engine, the protruding height of the injector nozzle and the matching of the combustion chamber largely determine the quality of the combustion performance. Therefore, it is often necessary to adjust the protruding height of the injector nozzle to match different combustion chambers and explore the best protruding height of the injector nozzle for different design schemes. When the injector adopts the side oil inlet method, since the position of the side oil inlet hole of the cylinder head is fixed, changing the protruding height of the injector nozzle requires replacing the test cylinder head. This process consumes a lot of time and energy. At the same time, the processing of cylinder heads with different side oil inlet hole positions also increases the economic cost of the test. Summary of the invention

[0004] In view of this, the present application aims to propose a lateral oil inlet device with adjustable protruding height of the injector nozzle, so as to solve the problems of difficult assembly of the lateral oil inlet cylinder head, poor centering, and difficult sealing. At the same time, it solves the problem that the protruding height of the injector nozzle of a single-cylinder engine matches the protruding height of the combustion chamber, and the protruding height of the injector nozzle needs to be adjusted during the combustion performance test, and the processing and replacement of different cylinder heads are required, thereby reducing the test cost of the combustion performance test of the single-cylinder engine, and improving the test efficiency.

[0005] To achieve the above purpose, the technical solution of this application is implemented as follows:

[0006] The present application provides a lateral oil inlet device with adjustable protruding height of an injector nozzle, comprising:

[0007] A fuel injector, wherein the fuel injector is arranged in a fuel injector hole provided on the cylinder head through a first compression sleeve, and an adjusting gasket is installed at the bottom of the fuel injector to form an annular sealing belt sealing the bottom of the fuel injector;

[0008] A mounting base, the mounting base being arranged corresponding to the oil inlet rod hole opened on the side of the cylinder head, the mounting base being provided with an assembly hole corresponding to the oil inlet rod hole, the oil inlet rod hole being arranged obliquely and being connected to the injector hole;

[0009] An oil inlet rod is arranged in the assembly hole through a second compression sleeve and is inclined to penetrate into the oil inlet rod hole. An oil inlet passage is built into the oil inlet rod.

[0010] Furthermore, a boss is formed circumferentially on the outer wall of the main body of the injector, and the inner wall of the first clamping sleeve is positioned correspondingly with the boss. The first clamping sleeve is provided with an external thread and cooperates with the thread of the injector hole to fix the injector in the injector hole.

[0011] Furthermore, the outer wall of the main body of the fuel injector is also provided with a plurality of first annular grooves, a first sealing rubber ring is installed in the first annular groove, and the plurality of first sealing rubber rings are respectively arranged on the upper and lower sides of the fuel inlet rod hole;

[0012] The injector hole is a stepped hole, the upper surface of the adjusting gasket is fitted with the bottom end surface of the injector, and the lower surface thereof is fitted with the bottom end surface of the injector hole.

[0013] Furthermore, the mounting base includes a fixing portion and a mounting portion integrally formed with the fixing portion;

[0014] The fixing portion is provided with a mounting hole, through which a stud is passed to fix the mounting base to the cylinder head;

[0015] The mounting portion is tiltedly arranged on the fixing portion, and an assembly hole penetrating the fixing portion and arranged in a stepped manner is opened in the mounting portion, and the assembly hole includes a first connection hole, a second connection hole and a third connection hole with gradually decreasing hole diameters.

[0016] Furthermore, the first connecting hole is an internal threaded hole, the second pressing sleeve is provided with an external thread, the second pressing sleeve is sleeved on the oil inlet rod and is threadably matched with the first connecting hole;

[0017] A positioning protrusion is formed on the main body of the oil inlet rod, a second annular groove is formed around the positioning protrusion, a second sealing rubber ring is installed in the second annular groove, and the second sealing rubber ring is in contact with the inner wall of the second connecting hole;

[0018] A steel ball groove is provided on the hole wall of the third connecting hole, and an embedded hole corresponding to the steel ball groove is provided on the outer wall of the main body of the oil inlet rod. A positioning steel ball is installed in the embedded hole and cooperates with the steel ball groove.

[0019] Furthermore, the oil inlet rod hole is a waist-shaped hole, and its width is greater than the diameter of the oil inlet rod;

[0020] The central axis of the oil inlet rod hole is parallel to or coincides with the central axis of the assembly hole.

[0021] Furthermore, a third annular groove is formed on the outer side wall of the cylinder cover, a third sealing rubber ring is installed in the third annular groove, and the third sealing rubber ring is in contact with the fixing portion.

[0022] Furthermore, the cylinder cover is provided with an oil drain hole connected with the oil inlet rod hole, an oil drain screw plug is installed in the oil drain hole, and an oil drain groove is provided on the oil drain screw plug.

[0023] Compared with the prior art, the lateral oil inlet device with adjustable protruding height of the injector nozzle described in the present application has the following beneficial effects:

[0024] (1) The side fuel inlet device with adjustable protruding height of the injector nozzle described in the present application solves the problem that when the protruding height of the injector nozzle matches the combustion chamber during the combustion performance test, the protruding height of the injector nozzle needs to be replaced and the cylinder head needs to be reprocessed when the injector adopts the side fuel inlet method. The protruding height of the side fuel inlet nozzle of the same cylinder head injector can be continuously adjusted, which reduces the processing cost of the test piece used in the combustion performance test and improves the test efficiency.

[0025] (2) The lateral oil inlet device with adjustable protruding height of the injector nozzle described in the present application solves the problem that the sealing surface of the oil inlet rod and the oil inlet hole of the injector is prone to failure under high pressure and the failure is not easy to be discovered due to the difficulty in installation alignment during the test. Due to the existence of the oil leakage hole, the failure of the seal between the oil inlet rod and the oil inlet hole of the injector resulting in fuel leakage can be discovered in the first time, thereby preventing the leaked fuel from entering the valve chamber to dilute the lubricating oil and cause more serious losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0027] Figure 1 A cross-sectional view of a lateral oil inlet device with adjustable protruding height of an injector nozzle according to an embodiment of the present application;

[0028] Figure 2 It is a left view of a lateral oil inlet device with adjustable protruding height of an injector nozzle according to an embodiment of the present application;

[0029] Figure 3 A cross-sectional view of the oil inlet rod described in an embodiment of the present application;

[0030] Figure 4 This is a schematic diagram of the oil inlet rod structure described in an embodiment of the present application;

[0031] Figure 5 A cross-sectional view of the mounting base described in an embodiment of the present application;

[0032] Figure 6 This is a front view of the mounting base described in the embodiment of the present application.

[0033] Description of reference numerals:

[0034] 1-injector; 2-first compression sleeve; 3-cylinder head; 4-first sealing rubber ring; 5-adjusting gasket; 6-oil drain plug; 7-oil inlet rod; 71-positioning protrusion; 72-second annular groove; 73-embedded hole; 74 oil inlet channel; 8-second compression sleeve; 9-second sealing rubber ring; 10-mounting base; 101-mounting hole; 102-first connecting hole; 103-second connecting hole; 104-third connecting hole; 105-steel ball groove; 11-third sealing rubber ring; 12-stud; 13-tightening nut. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0036] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] See also Figure 1 and Figure 2 As shown, this embodiment provides a lateral oil inlet device with adjustable nozzle protrusion height of an injector 1, comprising:

[0038] The fuel injector 1 is arranged in the fuel injector hole provided on the cylinder head 3 through the first compression sleeve 2, and the bottom of the fuel injector 1 is equipped with an adjusting gasket 5 to form an annular sealing belt for sealing the bottom of the fuel injector 1;

[0039] The mounting base 10 is arranged corresponding to the oil inlet rod hole opened on the side of the cylinder head 3. The mounting base 10 has an assembly hole corresponding to the oil inlet rod hole, and the oil inlet rod hole is arranged obliquely and communicated with the injector hole;

[0040] The oil inlet rod 7 is installed in the assembly hole through the second compression sleeve 8 and is inclined to penetrate into the oil inlet rod hole. The oil inlet rod 7 has an oil inlet passage 74 built in it.

[0041] Specifically, in the present embodiment, the injector 1 is fixed in the cylinder head 3 by the first compression sleeve 2, the injector 1 and the cylinder head 3 are sealed by the injector 1 adjusting gasket 5 and the protruding height of the injector 1 nozzle is adjusted, the oil inlet rod 7 is installed in the mounting base 10 by the second compression sleeve 8, the oil inlet rod 7 is positioned and installed together with the mounting base 10 to the outer side of the cylinder head 3, and the oil inlet rod 7 can be adjusted in height by following the position of the injector 1 through the second compression sleeve 8. Therefore, the device solves the problem that during the combustion performance test of matching the protruding height of the injector 1 nozzle with the combustion chamber, when the injector 1 adopts the lateral oil inlet method, the nozzle protruding height needs to be replaced and reprocessed in the cylinder head 3, and the lateral oil inlet nozzle protruding height of the injector 1 of the same cylinder head 3 is continuously adjustable, thereby reducing the processing cost of the test pieces used in the combustion performance test and improving the test efficiency.

[0042] In addition, the present application solves the problem that during the test, the sealing surface of the fuel inlet rod 7 and the fuel inlet hole of the fuel injector 1 is prone to failure under high pressure and the failure is not easy to be discovered due to the difficulty in installation alignment. Due to the existence of the oil leakage hole, the failure of the seal between the fuel inlet rod 7 and the fuel inlet hole of the fuel injector 1 can be discovered in the first time, thereby preventing the leaked fuel from entering the valve chamber to dilute the lubricating oil and causing more serious losses.

[0043] In some embodiments, Figure 1 As shown, a convex shoulder is formed on the outer wall of the main body of the fuel injector 1 in the circumferential direction, and the inner wall of the first compression sleeve 2 is positioned correspondingly with the convex shoulder. The first compression sleeve 2 is provided with an external thread, which cooperates with the thread of the fuel injector hole to fix the fuel injector 1 in the fuel injector hole;

[0044] The outer wall of the main body of the fuel injector 1 is also provided with a plurality of first annular grooves, in which a first sealing rubber ring 4 is installed, and the plurality of first sealing rubber rings 4 are respectively arranged on the upper and lower sides of the fuel inlet rod hole;

[0045] The injector hole is a stepped hole, the upper surface of the adjusting gasket 5 is fitted with the bottom end surface of the injector 1, and the lower surface thereof is fitted with the bottom end surface of the injector hole.

[0046] Specifically, in the present embodiment, an annular groove is provided at the upper and lower parts of the oil inlet hole of the injector 1, and a sealing rubber ring of the injector 1 is installed in the groove. The position of the groove ensures that during the adjustment of the protruding height of the injector nozzle 1, the oil inlet rod hole of the cylinder head 3 is always in the middle of the two annular grooves. A positioning steel ball of the injector 1 is also installed between the injector 1 and the cylinder head 3 for circumferential positioning of the injector 1.

[0047] The outer surface of the second compression sleeve 8 is provided with an external thread, which cooperates with the internal thread of the cylinder head 3 to compress the injector 1, so that the injector 1 is fixedly installed in the injector hole of the cylinder head 3.

[0048] An adjusting gasket 5 is installed at the bottom of the injector 1. The upper surface of the adjusting gasket 5 contacts the bottom surface of the injector 1, and the lower surface contacts the bottom surface of the injector hole of the cylinder head 3. After the injector 1 is compressed, two annular sealing belts are formed on the upper and lower surfaces of the adjusting gasket 5 respectively, which can realize the sealing of the bottom position of the injector 1.

[0049] In some embodiments, Figure 5 and Figure 6 As shown, the mounting base 10 includes a fixing portion and a mounting portion integrally formed with the fixing portion;

[0050] The fixing portion is provided with a mounting hole 101, through which a stud 12 passes, so that the mounting base 10 is fixedly connected to the cylinder head 3;

[0051] The mounting portion is tiltedly arranged on the fixing portion, and an assembly hole penetrating the fixing portion and arranged in a stepped manner is opened in the mounting portion, and the assembly hole includes a first connecting hole 102, a second connecting hole 103 and a third connecting hole 104 with gradually decreasing apertures, the first connecting hole 102 is an internal threaded hole, and the second compression sleeve 8 is provided with an external thread, the second compression sleeve 8 is sleeved on the oil inlet rod 7, and is threadedly matched with the first connecting hole 102;

[0052] like Figure 3 and Figure 4 As shown, a positioning protrusion 71 is formed on the main body of the oil inlet rod 7, and a second annular groove 72 is formed around the positioning protrusion 71. A second sealing rubber ring 9 is installed in the second annular groove 72, and the second sealing rubber ring 9 is in contact with the inner wall of the second connecting hole 103;

[0053] A steel ball groove 105 is formed on the wall of the third connecting hole 104 , and an embedded hole 73 corresponding to the steel ball groove 105 is formed on the outer wall of the main body of the oil inlet rod 7 . A positioning steel ball is installed in the embedded hole 73 and cooperates with the steel ball groove 105 .

[0054] Specifically, in this embodiment, an oil inlet passage 74 is provided at the center of the oil inlet rod 7, a positioning protrusion 71 is formed at the top of the main body of the oil inlet rod 7, an annular groove is circumferentially provided with the positioning protrusion 71, a sealing rubber ring is installed in the annular groove, the bottom of the oil inlet rod 7 is a spherical smooth surface, and cooperates with the oil inlet hole of the injector 1 to form a sealing ring belt, and the oil inlet rod 7 is tightened by the oil inlet rod 7 tightening sleeve and fixedly installed in the mounting base 10.

[0055] The present embodiment adopts a split structure of the mounting base 10 and the oil inlet rod 7, and the oil inlet rod 7 is fixed in the mounting base 10 by the second compression sleeve 8. In addition, by means of the first connecting hole 102, the second connecting hole 103 and the third connecting hole 104 opened in the mounting base 10, the three connecting holes form a two-level stepped structure, the first connecting hole 102 is used to assemble the second compression sleeve 8, the positioning protrusion 71 is correspondingly arranged at the position of the second connecting hole 103 through a sealing rubber ring, and a sealing structure is formed, a steel ball groove 105 is arranged in the third connecting hole 104, and an embedded hole 73 is opened on the outer wall of the main body of the oil inlet rod 7, and a positioning steel ball is installed in the embedded hole 73 to realize the circumferential positioning of the oil inlet rod 7, and the steel ball groove 105 cooperates with the first connecting hole 102 to realize that the depth of the oil inlet rod 7 extending into the oil inlet rod hole can be adjusted.

[0056] In addition, the aperture of the second connecting hole 103 of the mounting base 10 is the same as the diameter of the positioning protrusion 71 formed on the oil inlet rod 7. The two cooperate with each other and cooperate with the positioning steel ball set between the oil inlet rod 7 and the mounting base 10 to achieve axial positioning of the oil inlet rod 7 and the mounting base 10.

[0057] In some embodiments, Figure 1 As shown, the oil inlet rod hole is a waist-shaped hole, and its width is greater than the diameter of the oil inlet rod 7. The width of the waist-shaped holes on both sides of the mounting base 10 is the same as the width of the stud 12, ensuring that the center line of the oil inlet rod 7 is in the vertical plane of the center line of the oil inlet hole of the injector 1, so as to realize the horizontal positioning of the mounting base 10;

[0058] The central axis of the oil inlet rod hole is parallel to or coincides with the central axis of the assembly hole, leaving room for the oil inlet rod 7 to move up and down;

[0059] The cylinder cover 3 is also provided with an oil drain hole connected with the oil inlet rod hole, an oil drain screw plug 6 is installed in the oil drain hole, and an oil drain groove is provided on the oil drain screw plug 6.

[0060] Specifically, in the present embodiment, an oil inlet rod hole and an oil drain hole are respectively provided on the oil inlet side of the cylinder head 3. The oil inlet rod hole is a waist-shaped hole, the width of which is slightly larger than the outer diameter of the oil inlet rod 7, and the length is reasonably selected according to the nozzle protrusion height adjustment range and the structure of the cylinder head 3. The present embodiment does not make any specific limitation. The horizontal angle of the center line of the oil inlet rod hole is the same as the horizontal angle of the center line of the oil inlet hole of the injector 1. An oil drain hole is provided on the side wall of the cylinder head 3, the oil drain hole is connected with the oil inlet rod hole, and an oil drain screw plug 6 is installed in the oil drain hole, and the oil drain screw plug 6 has an oil drain groove.

[0061] In some embodiments, Figure 1 As shown, a third annular groove is further formed on the outer wall of the cylinder head 3, and a third sealing rubber ring 11 is installed in the third annular groove. The third sealing rubber ring 11 is fitted with the fixing portion.

[0062] Specifically, in this embodiment, a sealing rubber ring is installed at the connection between the mounting base 10 and the cylinder head 3 to improve the sealing between the mounting base 10 and the cylinder head 3 to prevent the leakage of fuel.

[0063] The installation and adjustment steps based on this device are as follows:

[0064] (1) According to the requirements of the nozzle protrusion height of the test injector 1, an appropriate injector 1 adjusting gasket 5 is selected and placed on the bottom surface of the injector 1, and the injector 1 is installed in the injector hole of the cylinder head 3. The injector 1 realizes the circumferential positioning of the oil inlet hole of the injector 1 by positioning the steel ball to avoid the circumferential rotation of the oil inlet hole and thus the circumferential deviation. According to the process requirements of the tightening torque of the injector 1, the first clamping sleeve 2 is tightened to realize the axial positioning of the injector 1.

[0065] (2) Install the oil inlet rod 7 into the mounting base 10. The oil inlet rod 7 cooperates with the second connecting hole 103 provided in the mounting base 10 through the positioning protrusion 71 to ensure that the center lines of the two are in line. Adjust the upper and lower positions of the mounting base 10. When the spherical smooth surface at the bottom of the oil inlet rod 7 coincides with the oil inlet hole of the injector 1, tighten the mounting base 10 to tighten the nut 13 to achieve the longitudinal positioning of the mounting base 10.

[0066] (3) After confirming that the above operations have correctly positioned the fuel inlet rod 7 and the fuel inlet hole of the fuel injector 1 in the horizontal and vertical directions, tighten the second compression sleeve 8 according to the tightening torque process requirements of the fuel inlet rod 7. The spherical smooth surface at the bottom of the fuel inlet rod 7 cooperates with the fuel inlet hole of the fuel injector 1 to form a sealing ring to ensure the sealing of the high-pressure fuel during the test process.

[0067] (4) When the protruding height of the injector nozzle 1 needs to be adjusted, simply replace the corresponding injector 1 adjusting gasket 5 and repeat the installation and adjustment steps (1) to (3).

[0068] (5) The oil drain plug 6 is installed to the oil drain hole on the side of the cylinder head 3. The oil drain plug 6 is screwed into the hole to expose the horizontal oil drain groove. This ensures that if the spherical smooth surface at the bottom of the oil inlet rod 7 and the oil inlet hole of the injector 1 fail during the test and the sealing ring fails, resulting in fuel leakage, it can be discovered immediately to avoid high-pressure fuel leaking into the valve chamber to dilute the lubricating oil.

[0069] The device has simple installation process, precise positioning, stable sealing, and can adjust the protruding height of 1 nozzle of 3 injectors in the same cylinder head to match different combustion chambers for single-cylinder engine combustion performance testing.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

[0071] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A lateral oil inlet device with adjustable protruding height of the injector nozzle, characterized in that: include: A fuel injector, wherein the fuel injector is arranged in a fuel injector hole provided on the cylinder head through a first compression sleeve, and an adjusting gasket is installed at the bottom of the fuel injector to form an annular sealing belt sealing the bottom of the fuel injector; A mounting base, the mounting base being arranged corresponding to the oil inlet rod hole opened on the side of the cylinder head, the mounting base being provided with an assembly hole corresponding to the oil inlet rod hole, the oil inlet rod hole being arranged obliquely and being connected to the injector hole; An oil inlet rod is arranged in the assembly hole through a second compression sleeve and is inclined to penetrate into the oil inlet rod hole. An oil inlet passage is built into the oil inlet rod.

2. A lateral oil inlet device with adjustable protruding height of a fuel injector nozzle according to claim 1, characterized in that: The outer wall of the main body of the injector is circumferentially formed with a boss, the inner wall of the first compression sleeve is positioned correspondingly with the boss, the first compression sleeve is provided with an external thread, and cooperates with the thread of the injector hole to fix the injector in the injector hole.

3. The lateral oil inlet device with adjustable protruding height of the injector nozzle according to claim 1, characterized in that: The outer wall of the main body of the fuel injector is also provided with a plurality of first annular grooves, in which a first sealing rubber ring is installed, and the plurality of first sealing rubber rings are respectively arranged on the upper and lower sides of the fuel inlet rod hole; The injector hole is a stepped hole, the upper surface of the adjusting gasket is fitted with the bottom end surface of the injector, and the lower surface thereof is fitted with the bottom end surface of the injector hole.

4. The lateral oil inlet device with adjustable protruding height of the injector nozzle according to claim 1, characterized in that: The mounting base includes a fixing portion and a mounting portion integrally formed with the fixing portion; The fixing portion is provided with a mounting hole, through which a stud is passed to fix the mounting base to the cylinder head; The mounting portion is tiltedly arranged on the fixing portion, and an assembly hole penetrating the fixing portion and arranged in a stepped manner is opened in the mounting portion, and the assembly hole includes a first connection hole, a second connection hole and a third connection hole with gradually decreasing hole diameters.

5. The lateral oil inlet device with adjustable protruding height of the injector nozzle according to claim 4, characterized in that: The first connecting hole is an internal threaded hole, the second pressing sleeve is provided with an external thread, the second pressing sleeve is sleeved on the oil inlet rod and is threadedly matched with the first connecting hole; A positioning protrusion is formed on the oil inlet rod body, a second annular groove is formed around the positioning protrusion, a second sealing rubber ring is installed in the second annular groove, and the second sealing rubber ring is in contact with the inner wall of the second connecting hole; A steel ball groove is provided on the hole wall of the third connecting hole, and an embedded hole corresponding to the steel ball groove is provided on the outer wall of the main body of the oil inlet rod. A positioning steel ball is installed in the embedded hole and cooperates with the steel ball groove.

6. The lateral oil inlet device with adjustable protruding height of the injector nozzle according to claim 4, characterized in that: The oil inlet rod hole is a waist-shaped hole, and its width is greater than the diameter of the oil inlet rod; The central axis of the oil inlet rod hole is parallel to or coincides with the central axis of the assembly hole.

7. The lateral oil inlet device with adjustable protruding height of the injector nozzle according to claim 4, characterized in that: A third annular groove is also formed on the outer side wall of the cylinder cover. A third sealing rubber ring is installed in the third annular groove. The third sealing rubber ring is in contact with the fixing portion.

8. The lateral oil inlet device with adjustable protruding height of the injector nozzle according to claim 1, characterized in that: The cylinder cover is also provided with an oil drain hole which is in communication with the oil inlet rod hole. An oil drain screw plug is installed in the oil drain hole, and an oil drain groove is provided on the oil drain screw plug.

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