Engine fuel pump mounting structure, engine assembly and vehicle

Abstract

The utility model relates to an engine fuel pump mounting structure, an engine assembly and a vehicle. The engine fuel pump mounting structure comprises a fuel pump, a connecting flange, a cylinder head cover and a mounting seat which are sequentially arranged. A tappet portion of the fuel pump penetrates through a first via hole of the connecting flange and a second via hole in the cylinder head cover and then is matched with a first positioning hole in the mounting base, and the first fixing piece sequentially penetrates through a first mounting hole of the fuel pump and a second mounting hole of the connecting flange and then is connected to a third mounting hole in the mounting base. And the fuel pump is fixedly mounted on the mounting seat. According to the engine fuel pump installation structure, the connecting flanges are arranged between the fuel pump and the cylinder head cover and between the fuel pump and the installation base, connection and sealing are achieved, the fuel pump serving as a standard part is suitable for installation of the engine, a fuel pump structure (namely a flange part of the fuel pump) matched with the cylinder head cover does not need to be redesigned, and cost reduction is facilitated.

Description

Technical Field

[0001] The present disclosure relates to the technical field of engines, and in particular to an engine fuel pump mounting structure, an engine assembly and a vehicle. Background Art

[0002] The engine high-pressure fuel pump seat is generally integrated on the cylinder head or cylinder head cover, and is driven by the camshaft, or is set as a separate component near the power source. In addition, some solutions also integrate the high-pressure fuel pump on the cam bearing cover. In order to achieve the isolation and sealing between the high-pressure fuel pump seat and the valve chamber, the high-pressure fuel pump seat is generally exposed outside the cylinder head cover.

[0003] In the related art, the high-pressure fuel pump and the high-pressure fuel pump seat are installed by passing the fixing piece through the first mounting hole of the flange of the high-pressure fuel pump and then connecting to the second mounting hole of the cylinder head cover, so as to achieve the matching of the high-pressure fuel pump and the cylinder head cover and install and fix it on the camshaft cover. Among them, the flange of the high-pressure fuel pump is used for connection and sealing at the same time, so it needs to be designed and manufactured separately, and the fuel pump as a standard part cannot be directly installed, resulting in increased costs. Utility Model Content

[0004] The purpose of the present disclosure is to provide an engine fuel pump mounting structure, an engine assembly and a vehicle. The engine fuel pump mounting structure is provided with a connecting flange between the fuel pump, the cylinder head cover and the mounting seat to achieve connection and sealing, so that the fuel pump as a standard part is suitable for installation in the engine, and there is no need to redesign the fuel pump structure (i.e., the flange part of the fuel pump) that cooperates with the cylinder head cover, which is conducive to reducing costs.

[0005] In order to achieve the above-mentioned object, the present disclosure provides, in a first aspect, an engine fuel pump mounting structure, comprising:

[0006] A fuel pump, comprising a tappet portion and a first mounting hole;

[0007] The connecting flange comprises a first through hole and a second mounting hole, wherein the first through hole is used for the tappet portion to pass through;

[0008] a cylinder head cover, comprising a second through hole for the tappet portion to pass through; and

[0009] The mounting seat comprises a first positioning hole and a third mounting hole for assembling the tappet portion; the mounting seat is used to be connected to the cylinder head;

[0010] The push rod portion passes through the first through hole of the connecting flange, the second through hole of the cylinder head cover and is positioned in cooperation with the first positioning hole of the mounting seat. The fuel pump, the connecting flange and the cylinder head cover are matched by a first fixing member that passes through the first mounting hole and the second mounting hole in sequence and is connected to the third mounting hole, so that the fuel pump is installed and fixed on the mounting seat.

[0011] Optionally, the mounting seat comprises a connecting portion and a positioning portion, and the connecting portion is abutted and matched with the connecting flange;

[0012] The positioning portion is formed with a first positioning hole for assembling the tappet portion, and the connecting portion is formed with a third mounting hole;

[0013] There is a gap between the positioning portion and the connecting flange.

[0014] Optionally, there are two connecting parts, and the positioning part is located between the two connecting parts.

[0015] Optionally, a first sealing groove is formed at a circumferential edge of the second through hole, a first sealing member is installed in the first sealing groove, and the first sealing member is used to seal between the connecting flange and the second through hole.

[0016] Optionally, the first sealing member is configured as a sealing ring, and a sealing ring for the first fixing member to pass through is integrally formed in the sealing ring, and the sealing ring is used for sealing between the first fixing member and the connecting flange and the mounting seat.

[0017] Optionally, a second concave sealing groove is formed on the circumferential edge of the third mounting hole for mounting the sealing ring.

[0018] Optionally, the mounting seat includes a fourth mounting hole;

[0019] The engine fuel pump mounting structure further comprises a cylinder head having a fifth mounting hole, wherein the fourth mounting hole corresponds to the fifth mounting hole one by one;

[0020] The second fixing member is connected to the fifth mounting hole of the cylinder head after passing through the fourth mounting hole, and is used for fixing the mounting seat.

[0021] Optionally, two arc-shaped grooves corresponding to two journal necks of the camshaft are formed at the bottom of the mounting seat, and the fourth mounting hole is respectively provided on two opposite sides of the two arc-shaped grooves.

[0022] Optionally, a second sealing member is provided at the junction between the first through hole of the connecting flange and the tappet portion.

[0023] A second aspect of the present disclosure provides an engine assembly, comprising the above-mentioned engine fuel pump mounting structure.

[0024] According to a third aspect of the present disclosure, a vehicle is provided, comprising the above-mentioned engine assembly.

[0025] Through the above technical solution, i.e. the disclosed engine fuel pump mounting structure, the tappet of the fuel pump passes through the first through hole of the connecting flange and the second through hole on the cylinder head cover and then matches with the first positioning hole on the mounting seat, the first fixing member passes through the first mounting hole of the fuel pump and the second mounting hole of the connecting flange in sequence and then connects to the third mounting hole of the mounting seat, and the fuel pump is mounted and fixed to the mounting seat through the connecting flange and matches with the cylinder head cover. Through the above setting method, a connecting flange is set between the fuel pump, the cylinder head cover and the mounting seat to achieve connection and sealing, so that the fuel pump as a standard part is suitable for the installation of the engine, and there is no need to redesign the fuel pump structure (i.e. the flange part of the fuel pump) that matches with the cylinder head cover, which is conducive to reducing costs.

[0026] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0028] Figure 1 It is an assembly drawing of the engine fuel pump mounting structure provided by some embodiments of the present disclosure.

[0029] Figure 2 It is an exploded view of the engine fuel pump mounting structure provided in some embodiments of the present disclosure.

[0030] Figure 3 It is a partial cross-sectional view of the engine fuel pump mounting structure provided in some embodiments of the present disclosure.

[0031] Figure 4 is based on Figure 3 Enlarged view of part A in .

[0032] Figure 5 It is a structural diagram of the connecting flange of the engine fuel pump mounting structure provided in some embodiments of the present disclosure.

[0033] Figure 6 It is a partial structural diagram of a cylinder head cover of an engine fuel pump mounting structure provided in some embodiments of the present disclosure.

[0034] Figure 7 It is a structural diagram of a mounting seat of an engine fuel pump mounting structure provided in some embodiments of the present disclosure.

[0035] Figure 8It is a structural diagram of the camshaft of the engine fuel pump mounting structure provided in some embodiments of the present disclosure.

[0036] Fig. 9 It is a structural diagram of the first seal of the engine fuel pump mounting structure provided in some embodiments of the present disclosure.

[0037] Description of Reference Numerals

[0038] 100 - fuel pump; 110 - tappet; 120 - first mounting hole; 130 - third sealing groove;

[0039] 200-connecting flange; 210-first through hole; 220-second mounting hole;

[0040] 300 - cylinder head cover; 310 - second through hole; 320 - first sealing groove;

[0041] 400-mounting seat; 400a-connecting part and positioning part; 400b-connecting part and positioning part; 410-first positioning hole; 420-third mounting hole; 421-second sealing groove; 430-fourth mounting hole; 440-arc groove;

[0042] 500-camshaft; 510-shaft neck;

[0043] 600-cylinder head;

[0044] 710-first fixing member; 720-second fixing member;

[0045] 800-first sealing member; 810-sealing ring; 811-sealing ring; 812-connecting strip;

[0046] 900 - Second seal. DETAILED DESCRIPTION

[0047] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0048] In this disclosure, unless otherwise stated, directional words such as "upper, lower, left, right" generally refer to the upper, lower, left, and right of the corresponding drawings; "inside and outside" refer to the inside and outside of the outline of the component or structure itself. "First, second" and the like are used to distinguish one element from another and do not have order or importance. In addition, in the description with reference to the drawings, the same mark in different drawings represents the same element.

[0049] In order to achieve the above purpose, Figures 1 to 9As shown, an embodiment of the present disclosure provides an engine fuel pump mounting structure, which includes a fuel pump 100, a connecting flange 200, a cylinder head cover 300 and a mounting seat 400 which are arranged in sequence. Among them, the fuel pump 100 includes a tappet portion 110 and a first mounting hole 120; the connecting flange 200 includes a first through hole 210 and a second mounting hole 220, the first through hole 210 is used for the tappet portion 110 to pass through; the cylinder head cover 300 includes a second through hole 310 for the tappet portion 110 to pass through; the mounting seat 400 includes a first positioning hole 410 and a third mounting hole 420 for assembling the tappet portion 110; the mounting seat 400 is used to be connected to the cylinder head 600; the tappet portion 110 passes through the first through hole 210 of the connecting flange 200, the second through hole 310 of the cylinder head cover 300 and is positioned in coordination with the first positioning hole 410 of the mounting seat 400, and the fuel pump 100, the connecting flange 200 and the cylinder head cover 300 are coordinated by the first fixing member 710 that passes through the first mounting hole 120 and the second mounting hole 220 in sequence and is connected to the third mounting hole 420, so that the fuel pump 100 is installed and fixed on the mounting seat 400.

[0050] Through the above technical solution, i.e. the engine fuel pump mounting structure disclosed in the present invention, the tappet part 110 of the fuel pump 100 passes through the first through hole 210 of the connecting flange 200 and the second through hole 310 on the cylinder head cover 300 and then matches with the first positioning hole 410 on the mounting seat 400, and the first fixing member 710 passes through the first mounting hole 120 of the fuel pump 100 and the second mounting hole 220 of the connecting flange 200 in sequence and then connects to the third mounting hole 420 of the mounting seat 400, and the fuel pump 100 is mounted and fixed on the mounting seat 400 through the connecting flange 200 and the cylinder head cover 300. Through the above setting method, the connecting flange 200 is set between the fuel pump 100, the cylinder head cover 300 and the mounting seat 400 to achieve connection and sealing, so that the fuel pump 100 as a standard part is suitable for the installation of the engine, and there is no need to redesign the structure of the fuel pump 100 (i.e. the flange part of the fuel pump 100) that matches with the cylinder head cover 300, which is conducive to reducing costs.

[0051] It should be noted that the engine fuel pump mounting structure also includes a camshaft 500 and a cylinder head 600, the mounting seat 400 is used to be mounted on the cylinder head 600, the camshaft 500 is rotatably arranged between the cylinder head 600 and the mounting seat 400, and a bearing structure for rotating the journal 510 of the camshaft 500 can be formed between the mounting seat 400 and the cylinder head 600, so as to rotate the camshaft 500. The tappet portion 110 abuts against the camshaft 500, and can push the tappet portion 110 to reciprocate when the camshaft 500 rotates to provide power for the fuel pump 100.

[0052] It can be understood that the fuel pump 100 disclosed in the present invention may be a high-pressure fuel pump 100 .

[0053] Generally speaking, due to the flatness error, the larger the contact area between surfaces, the worse the fitting effect. Considering the fitting effect between the connecting flange 200 and the mounting seat 400, in some embodiments, the mounting seat 400 includes a connecting portion 400a for abutting with the connecting flange 200, and also includes a positioning portion 400b; the positioning portion 400b is formed with a first positioning hole 410 for assembling the pillar portion 110, and the connecting portion 400a is formed with a third mounting hole 420; there is a gap between the positioning portion 400b and the connecting flange 200.

[0054] Through the above arrangement, that is, while the connection part 400a is in contact with the connection flange 200, the positioning part 400b is arranged to be lower than the connection part 400a, so as to form a gap between the positioning part 400b and the connection flange 200, wherein the lower surface of the connection flange 200 is in contact with the top surface of the connection part 400a, so as to form a support for the connection flange 200, and the first fixing member 710 can be connected to the third mounting hole 420 of the connection part 400a after passing through the second mounting hole 220 on the connection flange 200, so as to fix the connection flange 200. Since the positioning part 400b is relatively low relative to the plane of the connection part 400a, the positioning part 400b does not contact the connection flange 200, so as to ensure the connection and reduce the contact area between the connection flange 200 and the mounting seat 400, thereby improving the fitting effect of the two.

[0055] The arrangement method with a gap between the positioning portion 400b and the connecting flange 200 is actually to connect the mounting surface (i.e. Figure 3 and Figure 4 The upper surface of the connecting portion 400a in the embodiment) and the mounting surface of the tappet portion 110 (i.e. Figure 3 and Figure 4 The upper surface of the positioning surface in the middle is staggered to improve the accuracy of surface fitting and improve the installation effect.

[0056] like Figure 3 As shown, in some embodiments, there are two connecting parts 400a, and the positioning part 400b is located between the two connecting parts 400a. The positioning part 400b is configured as a concave structure between the two connecting parts 400a, the first positioning hole 410 is provided in the positioning part 400b, and the two connecting parts 400a are located on opposite sides of the first positioning hole 410.

[0057] It should be noted that the connecting flange 200 includes two second mounting holes 220 corresponding to the third mounting hole 420, and a flange portion for mounting the fuel pump 100 may be formed on the fuel pump 100, and the flange portion is formed with two first mounting holes 120 corresponding to the second mounting holes 220 and the third mounting holes 420, so that the two first fixing members 710 can pass through the first mounting holes 120 and the second mounting holes 220 respectively and then be connected to the third mounting hole 420, thereby fixing the fuel pump 100.

[0058] The connection part 400a and the positioning part 400b can be constructed in any suitable structure. For example, the connection part 400a can be constructed as a tappet structure, and the third mounting hole 420 is formed on the tappet structure to form a tappet hole. The part between the two tappet structures forms the positioning part 400b having the first positioning hole 410.

[0059] Optionally, a first sealing groove 320 is formed at the circumferential edge of the second through hole 310, and a first sealing member 800 is installed in the first sealing groove 320, and the first sealing member 800 is used to seal the connection flange 200 and the second through hole 310. The first sealing member 800 may be a sealing ring 810 or a sealing strip, which is installed in the first sealing groove 320. The first sealing groove 320 has the same or similar shape as the connection flange 200, and the size may be slightly smaller than the outer edge of the connection flange 200. The annular structure surrounded by the first sealing member 800 is installed in the first sealing groove 320, which can ensure the sealing performance in the cylinder head cover 300.

[0060] like Figure 2 , Figure 3 and Fig. 9 As shown, in some embodiments, the first sealing member 800 is configured as a sealing ring 810, and a sealing ring 811 for the first fixing member 710 to pass through is also integrally formed in the sealing ring 810, and the sealing ring 811 is used for sealing between the first fixing member 710 and the connecting flange 200 and the mounting seat 400. The sealing ring 811 is located inside the sealing ring 810 and is integrally connected to the inner side wall of the sealing ring 810 through a connecting strip 812. For example, there may be two sealing rings 811, which are respectively connected to the sealing ring 810, and are used for two first fixing members 710 to pass through and seal.

[0061] In order to install the sealing ring 811, in some embodiments, the circumferential edge of the third mounting hole 420 is formed with a concave second sealing groove 421 for installing the sealing ring 811. The surface of the mounting seat 400 is also formed with a channel communicating with the third mounting hole 420 for installing the connecting strip 812 connecting the sealing ring 811 and the sealing ring 810 to prevent it from being too protruding and affecting the sealing.

[0062] In order to achieve a fixed connection between the mounting base 400 and the cylinder head 600, as Figure 2 and Figure 7 As shown, in some embodiments, the mounting base 400 includes a fourth mounting hole 430; the engine fuel pump mounting structure also includes a cylinder head 600 having a fifth mounting hole, and the fourth mounting hole 430 corresponds one-to-one to the fifth mounting hole; the second fixing member 720 is connected to the fifth mounting hole of the cylinder head 600 after passing through the fourth mounting hole 430, and is used to fix the mounting base 400.

[0063] The mounting base 400 may be provided with a plurality of fourth mounting holes 430, which correspond to the plurality of fifth mounting holes on the cylinder head 600 one by one, and the mounting base 400 is connected to the cylinder head 600 by respectively penetrating the second fixing members 720. For example, there are four fourth mounting holes 430 and four fifth mounting holes, respectively, and the four fourth mounting holes 430 are arranged around the circumference of the mounting base 400.

[0064] It should be noted that the first fixing member 710 and the second fixing member 720 of the present disclosure can both be bolts or bolt nails, and the corresponding third mounting hole 420 and fifth mounting hole are screw holes.

[0065] like Figure 7 and Figure 8 As shown, in some embodiments, the engine assembly may include a camshaft 500, and the camshaft 500 is formed with two journal necks 510; the bottom of the mounting seat 400 is formed with two arc grooves 440 corresponding to the two journal necks 510 of the camshaft 500, and a fourth mounting hole 430 is respectively provided on the opposite sides of the two arc grooves 440.

[0066] In order to achieve sealing between the inner side wall of the tappet portion 110 of the fuel pump 100 and the first through hole 210 of the connecting flange 200, in some embodiments, a second sealing member 900 is provided at the junction of the first through hole 210 of the connecting flange 200 and the tappet portion 110. For example, a third sealing groove 130 may be provided on the circumferential side wall of the tappet portion 110, and the second sealing member 900 is installed in the third sealing groove 130. When the tappet portion 110 is installed in the first through hole 210, the second sealing member 900 can seal between the two. Of course, the third sealing groove 130 may also be provided on the inner side wall of the first through hole 210, and sealing between the two may also be achieved.

[0067] It should be noted that the second sealing member 900 may be a sealing ring 810 or a sealing strip known in the related art, as long as the sealing effect can be achieved.

[0068] The engine fuel pump installation structure disclosed in the present invention includes a cylinder head 600, a camshaft 500, a mounting seat 400, a cylinder head cover 300, a connecting flange 200, a fuel pump 100, a first fixing member 710, a second fixing member 720, and a first sealing member 800.

[0069] The mounting seat 400 is connected to the cylinder head 600 through four second fixing members 720. The mounting seat 400 also integrates the function of supporting the camshaft 500. The arc groove 440 thereon forms a sliding bearing with the cylinder head 600 to provide support and lubrication for the camshaft 500. The mounting seat 400 is provided with a positioning portion 400b with a first positioning hole 410 and a connecting portion 400a with a third mounting hole 420, which are used to install the fuel pump 100 and ensure that the fuel pump 100 works under the driving cam of the camshaft 500.

[0070] The fuel pump 100 is installed on the mounting base 400 through the first fixing member 710. Since the fuel pump 100 needs to pass through the cylinder head cover 300, in order to solve the sealing problem, a connecting flange 200 is set between the cylinder head cover 300 and the fuel pump 100, and one or more sealing rings 810 are installed between the cylinder head cover 300 and the connecting flange 200. In this way, the sealing problem between the mounting base 400, the cylinder head cover 300 and the fuel pump 100 can be solved.

[0071] After the connection flange 200 is provided in this embodiment, three sets of sealing problems need to be solved: the sealing between the connection flange 200 and the cylinder head cover 300 , the sealing between the connection flange 200 and the mounting seat 400 , and the sealing between the connection flange 200 and the fuel pump 100 .

[0072] In order to solve the sealing between the connecting flange 200 and the cylinder head cover 300, a first sealing groove 320 is provided on the cylinder head cover 300, and the sealing ring 810 is installed in the first sealing groove 320 to achieve the sealing between the connecting flange 200 and the cylinder head cover 300. It should be noted that after the mounting seat 400 and the cylinder head cover 300 are installed, the height of the top flange surface of the mounting seat 400 needs to be higher than the top of the sealing groove of the cylinder head cover 300, so as to ensure effective sealing.

[0073] In order to solve the sealing between the connecting flange 200 and the mounting seat 400, a second sealing groove 421 is provided on the flange surface of the top surface of the mounting seat 400 for installing a sealing ring 811, which can solve the problem of lubricating oil leakage through the bolts. It should be noted that this sealing ring 811 can be integrated with the sealing ring 810 of the first sealing member 800, that is, the two can be integrally formed, which can reduce the number of parts and facilitate installation and disassembly.

[0074] In addition, the sealing between the connecting flange 200 and the fuel pump 100 is achieved by the second sealing member 900 disposed in the third sealing groove 130 on the fuel pump 100 , which has been maturely applied in the existing technology and will not be described in detail.

[0075] An embodiment of the present disclosure provides an engine assembly, which includes the engine fuel pump mounting structure of the above embodiment. Therefore, the engine assembly also has all the advantages of the engine fuel pump mounting structure, which will not be repeated here.

[0076] The embodiments of the present disclosure also provide a vehicle, which includes the engine assembly of the above embodiments. Therefore, the vehicle also has all the advantages of the engine assembly, which will not be described in detail here.

[0077] The engine fuel pump mounting structure, engine assembly and vehicle disclosed in the present invention include a fuel pump 100, a connecting flange 200, a cylinder head cover 300 and a mounting seat 400 which are arranged in sequence. The tappet portion 110 of the fuel pump 100 passes through the first through hole 210 of the connecting flange 200 and the second through hole 310 on the cylinder head cover 300 and then cooperates with the first positioning hole 410 on the mounting seat 400. The first fixing member 710 passes through the first mounting hole 120 of the fuel pump 100 and the second mounting hole 220 of the connecting flange 200 in sequence and then connects to the third mounting hole 420 of the mounting seat 400. The fuel pump 100 is mounted and fixed on the mounting seat 400 through the connecting flange 200 and the cylinder head cover 300. Through the above-mentioned setting method, a connecting flange 200 is set between the fuel pump 100, the cylinder head cover 300 and the mounting seat 400 to achieve connection and sealing, so that the fuel pump 100 as a standard part is suitable for installation in the engine. There is no need to redesign the structure of the fuel pump 100 (i.e., the flange part of the fuel pump 100) that cooperates with the cylinder head cover 300, which is conducive to reducing costs.

[0078] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0079] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0080] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. An engine fuel pump mounting structure, characterized in that: include: A fuel pump, comprising a tappet portion and a first mounting hole; The connecting flange comprises a first through hole and a second mounting hole, wherein the first through hole is used for the tappet portion to pass through; a cylinder head cover, comprising a second through hole for the tappet portion to pass through; and The mounting seat comprises a first positioning hole and a third mounting hole for assembling the tappet portion; the mounting seat is used to be connected to the cylinder head; The push rod portion passes through the first through hole of the connecting flange, the second through hole of the cylinder head cover and is positioned in cooperation with the first positioning hole of the mounting seat. The fuel pump, the connecting flange and the cylinder head cover are matched by a first fixing member that passes through the first mounting hole and the second mounting hole in sequence and is connected to the third mounting hole, so that the fuel pump is installed and fixed on the mounting seat.

2. The engine fuel pump mounting structure according to claim 1, characterized in that: The mounting seat comprises a connecting portion and a positioning portion, and the connecting portion is in abutment with the connecting flange; The positioning portion is formed with a first positioning hole for assembling the tappet portion, and the connecting portion is formed with a third mounting hole; There is a gap between the positioning portion and the connecting flange.

3. The engine fuel pump mounting structure according to claim 2, characterized in that: There are two connecting parts, and the positioning part is located between the two connecting parts.

4. The engine fuel pump mounting structure according to claim 1, characterized in that: A first sealing groove is formed at the circumferential edge of the second through hole. A first sealing member is installed in the first sealing groove. The first sealing member is used to seal between the connecting flange and the second through hole.

5. The engine fuel pump mounting structure according to claim 4, characterized in that: The first sealing member is configured as a sealing ring, and a sealing ring for the first fixing member to pass through is integrally formed in the sealing ring. The sealing ring is used for sealing between the first fixing member and the connecting flange and the mounting seat.

6. The engine fuel pump mounting structure according to claim 5, characterized in that: A second concave sealing groove is formed on the circumferential edge of the third mounting hole for mounting the sealing ring.

7. The engine fuel pump mounting structure according to claim 1, characterized in that: The mounting seat comprises a fourth mounting hole; The engine fuel pump mounting structure further comprises a cylinder head having a fifth mounting hole, wherein the fourth mounting hole corresponds to the fifth mounting hole one by one; The second fixing member is connected to the fifth mounting hole of the cylinder head after passing through the fourth mounting hole, and is used for fixing the mounting seat.

8. The engine fuel pump mounting structure according to claim 7, characterized in that: The bottom of the mounting seat is formed with two arc-shaped grooves corresponding to the two journal necks of the camshaft, and the fourth mounting holes are respectively arranged on two opposite sides of the two arc-shaped grooves.

9. The engine fuel pump mounting structure according to any one of claims 1 to 8, characterized in that: A second sealing member is provided at the junction of the first through hole of the connecting flange and the tappet portion.

10. An engine assembly, characterized in that: It comprises an engine fuel pump mounting structure as described in any one of claims 1-9.

11. A vehicle, characterized in that: Comprising the engine assembly as claimed in claim 10.

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