KR102604769B1 - Multi-Face Contact type High Pressure Pump Mounting Sevice - Google Patents

Abstract

In the multi-surface contact high pressure pump mounting device (1) of the present invention, the mounting plate (10) combining the engine adapter (30) and the high pressure pump (60) is deformed by the bolt axial force (F) of the bolt (40), thereby transforming the engine adapter (30) and the high pressure pump (60). The state is changed to narrow the gap (t) of the first contact surface 51 with respect to (30), and the second contact surface 52 and the third contact surface 53 are provided at a distance from each other on the mounting plate 10. By forming a fixing force through a difference in the contact order with the engine adapter (30) due to the difference in the strength of the bolt axial force in the state, the excessive axial force of the bolt that exceeds the specified torque is alleviated by the increased surface contact section, and in particular, the third contact surface (53) reduces the excessive bolt axial force. By distributing the load to both sides and acting as an additional seating surface to reduce the load on the weld joint and bolt, it responds to the strengthened installation environment caused by the high pressure of the fuel system and prevents damage and destruction of the flange/bolt. has

Description

Multi-Face Contact type High Pressure Pump Mounting Sevice}

The present invention relates to a high-pressure pump mounting device, and particularly to a multi-surface contact high-pressure pump mounting device that increases the dispersion effect of excessive bolt torque by increasing the surface contact section between the engine adapter and the flange.

In general, a high-pressure pump for a vehicle is a pump device that compresses low-pressure fuel in a fuel tank to high pressure by the required amount and sends it to the fuel rail in order to inject high-pressure fuel into the engine cylinder. In this case, the high-pressure fuel in the fuel rail is supplied to an injector that controls the output of the engine by injecting fuel into the engine cylinder according to operating conditions.

In the pump mounting structure, the high pressure pump is assembled to the engine and operates by receiving driving force through a cam connected to the drive shaft of the engine. Therefore, the high-pressure pump has a structure for mounting with the engine, and the mounting structure is implemented with a flange, bolt, and engine adapter.

For example, the flange is coupled to the pump body by welding, the engine adapter is abutted to the flange, and the bolt is composed of two bolts and is respectively screwed at the same distance through bolting holes drilled in the flange and the engine adapter. fixes it.

In particular, the flange forms a gap with the engine surface of the engine adapter by the pump body assembled to the engine adapter before bolt assembly, and the flange is deformed by the bolt axial force by bolt fastening, so that it is seated on the engine surface of the engine adapter, thereby providing elasticity. The restoring force prevents fatigue and heaving due to operating load when operating a high-pressure pump. In this case, the operating load of the high pressure pump is the force applied to the piston through the cam for fuel compression, and the load applied to the flange and bolt also increases by acting in the opposite direction to the axial force of the bolt to separate the pump from the engine. When the pump pressure is increased, the specified axial force of the bolt is increased to prevent separation due to the operating load.

In this way, the flange secures the pump body of the high-pressure pump to the engine adapter through bolts, thereby suppressing pump vibration by transmitting the operating load of the high-pressure pump, especially the high-pressure pump for gasoline direct injection, and the axial force of the bolt.

European Public Patent EP 3798441A (2020.08.31)

However, the high-pressure pump may be assembled with excessive torque that deviates from the manually defined bolt torque due to an engine assembly line or A/S worker's mistake, and such excessive axial force of the bolt causes excessive stress on the welds and bolts of the pump body and flange. This can cause flange deformation and lead to damage.

Moreover, the operating load of the high-pressure pump must be greatly increased due to the vehicle's fuel injection system, which requires high pressure in order to increase the efficiency of the engine, while the flange is required to be miniaturized due to a reduction in the assembly space of the engine.

In particular, small flanges are bound to be easily damaged due to the high possibility of fatigue failure due to the lack of rigidity and elastic recovery force of the flange itself even when the load applied to the flange increases significantly. Such small flange damage leads to fixation of the high pressure pump and loss of the original function of the pump. Proceeding may cause leakage of engine oil and fuel, resulting in a risk of fire.

In this way, the mounting structure of the high-pressure pump is designed to handle the increase in operating load due to the demand for high pressure fuel system for high-efficiency engines, the need for flange miniaturization due to engine layout reduction, and the increase in bolt axial force due to operator error when securing bolt rigidity by increasing bolt size. There is a need for structural changes that can prevent damage to flange welds and improve the rigidity of flange thickness, while resolving assembly disadvantages due to increased welding thickness and the cost of increasing the thickness of the flange.

Accordingly, taking the above into consideration, the present invention increases the surface contact section of the plate with respect to the engine adapter to alleviate the excessive axial force of the bolt that exceeds the specified torque, thereby responding to the strengthened mounting environment due to the high pressure of the fuel system and preventing damage to the plate/bolt. In addition, the protrusion of the plate acts as an additional seating surface to reduce the load on the welded joint and bolt by spreading the load of excessive bolt axial force to both sides, thereby reducing the disadvantages of structural change and miniaturization of the flange. The purpose is to provide a multi-facet contact type high pressure pump mounting device that solves the problem.

The high-pressure pump mounting device of the present invention for achieving the above object is a mounting plate that is fixed to the high-pressure pump by narrowing the gap with the engine adapter by deforming the bolt axial force of the bolt screwed to the engine adapter on which the high-pressure pump is assembled. , and a first contact surface forming the gap, a multi-facet contact part consisting of a second contact surface and a third contact surface that are provided on the mounting plate at a distance from each other and change the contact order with the engine adapter due to differences in bolt axial force strength. It is characterized by being included.

In a preferred embodiment, the second contact surface and the third contact surface are formed on the lower surface of the mounting plate, and the second contact surface and the third contact surface protrude to a predetermined height with the lower surface as a reference surface of the plate, The height of the third contact surface is greater than the height of the second contact surface.

In a preferred embodiment, the second contact surface is made of a semicircular border protrusion structure, and the third contact surface is made of one of a straight bar protrusion structure, a hemispherical protrusion structure, and a circular cross-section structure, and the straight bar protrusion structure is formed by a press method. It is formed to form an engraved groove around the bolt hole of the mounting plate, and the hemispherical protruding structure or the circular cross-sectional structure is formed of first protrusions and second protrusions spaced apart from each other.

In a preferred embodiment, the second contact surface and the third contact surface are formed around the bolt hole of the mounting plate through which the bolt penetrates, and the second contact surface is centered on the bolt hole and is located outside the hole away from the housing. is located, and the third contact surface is close to the housing with the bolt hole as the center. It is located inside the hole.

In a preferred embodiment, the first contact surface is formed as the bottom surface of the housing of the high-pressure pump, and the bottom surface of the housing is located below the weld edge where the mounting plate is coupled to form the gap.

In a preferred embodiment, the welding edge protrudes from the outer diameter of the pump housing of the high-pressure pump to form a welding step, and the welding step forms a housing hole and a welding fixture of the mounting plate.

In a preferred embodiment, the bolt penetrates the bolt hole of the mounting plate and is screwed to the mounting hole of the engine adapter, and the difference in the strength of the bolt axial force is generated as a fastening torque that generates the bolt axial force.

In a preferred embodiment, the engine adapter forms a pump hole, and the high pressure pump is assembled with the pump hole at the lower part of the pump housing.

The high-pressure pump mounting device of the present invention achieves the following actions and effects by applying a multi-facet contact structure.

First, damage and destruction of the flange/bolt are prevented even under excessive axial force of the bolt just by deforming the surface contact section of the flange, making it easy to install the high-pressure pump even in a strengthened installation environment due to the high pressure of the fuel system. Second, there is no need to increase the flange thickness to strengthen the flange rigidity by preventing deformation and damage of the flange weld/bolt during bolting. Third, even if the operating load of the high-pressure pump increases in line with the high-pressure fuel system for high-efficiency engines, it is possible to miniaturize the flange required by reducing the engine layout. Fourth, it is possible to reduce flange weld/bolt stress (i.e., load) even at excessive torque beyond the manually defined bolt torque, thereby preventing fastening defects caused by mistakes on the engine assembly line or after-sales service workers. Fifth, the problems that occurred with the existing two-point contact surface mounting structure were increased operating load due to the requirement for high pressure in the fuel system for high-efficiency engines, requirement for flange miniaturization due to reduction of engine layout, and operator error when securing bolt rigidity by increasing bolt size. The improvement effect can be greatly increased by preventing damage to the flange weld zone due to the increase in bolt axial force, cost due to the improvement in rigidity of the flange thickness, and assembly disadvantages due to the increase in weld thickness.

Figure 1 is a configuration diagram of a multi-facet contact type high pressure pump mounting device according to the present invention, Figure 2 is a configuration diagram of a multi-face contact portion of the high pressure pump mounting device according to the present invention, and Figure 3 is a configuration diagram of a mounting plate according to the present invention. This is a diagram showing the configuration of the multi-facet contact part of the high pressure pump mounting device. Figure 4 shows the multi-facet contact state of the high pressure pump mounting device using the multi-side contact part according to the present invention, and Figure 5 shows the mounting plate using the multi-side contact part according to the present invention and This is an example of a stress division simulation of a bolt, and Figure 6 is an example of a structural modification of a multi-faceted contact part according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached illustration drawings. These embodiments are examples and may be implemented in various different forms by those skilled in the art to which the present invention pertains, so they are described herein. It is not limited to the embodiment.

Referring to FIG. 1, the high-pressure pump mounting device 1 is composed of a mounting plate 10, a welding edge 20, an engine adapter 30, a bolt 40, and a multi-faceted contact portion 50, so that the high-pressure pump 60 ) is fixed.

For example, the mounting plate 10 is coupled to the welded edge 20 formed on the pump housing 61 of the high pressure pump 60 assembled to the engine adapter 30 and the housing hole 13 drilled in the center. A gap t is maintained between the plate assembly surface 35 of the engine adapter 30 (see FIG. 3).

In addition, the mounting plate 10 has a bolt head 41 of the bolt 40 that passes through the bolt hole 15 drilled on the left and right sides and is screwed to the engine adapter 30 and the bolt shaft 42. The gap t between the lower surface 11B and the plate assembly surface 35 (see FIG. 3) is eliminated by the bolt axial force of the fastening torque applied to (11A), thereby forming a strong fixing force with the high pressure pump 60.

Therefore, the mounting plate 10 acts as a leaf spring with its own elasticity after the bolt 40 is assembled, thereby reducing load variation (or fatigue load) and heave due to the operating load.

For example, the welding edge 20 is formed integrally with the pump housing 61 of the high pressure pump 60, and in particular, the housing hole 13 of the mounting plate 10 has a stepped structure on the outer diameter of the pump housing 61. This fitting welding step 21 is formed to provide a close contact section between the step side of the welding step 21 and the inner peripheral surface of the housing hole 13, and the close contact section is welded to form the mounting plate 10 and the high pressure pump 60. ) Forms inter-weld fixation force.

For example, the engine adapter 30 is a component (or component part) of an engine (not shown) and provides an assembly space for the high pressure pump 60 and bolts 40, and the mounting plate 10 is assembled. It is in close contact with the lower surface (11B).

For this purpose, the engine adapter 30 forms a plate assembly surface 35 on the upper surface of the adapter body through which the mounting hole 31 and the pump hole 33 are drilled. In this case, the mounting hole 31 has a female thread structure and is screwed with the male thread of the bolt shaft 42 forming the bolt 40, and the pump hole 33 is connected to the pump housing 61 constituting the high pressure pump 60. The lower part of the is inserted and fixed, and the plate assembly surface 35 forms a gap t with respect to the lower surface 11B of the mounting plate 10, and is formed by elastic deformation of the mounting plate 10 to form a multi-faceted plate assembly surface 35. It is formed as a contact portion 50.

For example, the bolt 40 consists of a bolt head 41 and a bolt shaft 42, and the bolt head 41 is in close contact with the upper surface 11A of the mounting plate 10 and attaches the mounting plate ( 10) is elastically deformed, and the bolt shaft 42 consists of a male thread shaft protruding with a small diameter from the bolt head 41 and is fixed to the engine adapter 30 by screwing with the mounting hole 31 of a female thread structure. .

For example, the multi-surface contact portion 50 includes the lower surface 11B of the mounting plate 10, the housing bottom surface 23 of the welding edge 20 (see FIG. 3), and the plate assembly surface of the engine adapter 30. It is formed between (35) and occurs when fastened to the three first, second, and third contact surfaces (51, 52, and 53) (see FIG. 3) in the gap (t) between the mounting plate (10) and the engine adapter (30). It prevents failure due to destruction of the mounting plate (10)/bolt (40) by reducing and alleviating stress on the mounting plate (10) caused by excessive bolt axial force.

Therefore, the multi-sided contact portion 50 allows the high pressure pump mounting device 1 to be characterized as a multi-sided contact high pressure pump mounting device.

For example, in the high-pressure pump 60, the pump housing 61 elastically supported by the spring 63 is inserted into the pump hole 33 and assembled to the engine adapter 30, and the pump housing 61 is elastically supported by the spring 63 and is assembled to the engine adapter 30. The reciprocating motion of the piston (6) pressurizes the low-pressure fuel in the compression chamber, thereby discharging the high-pressure fuel toward the fuel rail (not shown).

Meanwhile, referring to FIG. 2, the mounting plate 10 is made of a plate body of approximately diamond shape with upper and lower surfaces 11A and 11B formed at a predetermined thickness capable of elastic deformation, and the plate body has a housing hole ( 13) and the bolt hole 15 are drilled, and the plate seating surface 18 and the plate protruding surface 19 form a protruding portion from the plate reference surface 16.

Therefore, the mounting plate 10 forms a left section and a right section that are symmetrical to each other in a diamond shape, and the plate seating surface 18 and the plate protruding surface 19 are formed equally in each of the left section and the right section. .

For example, the housing hole 13 is drilled in the center of the plate body, inserted into the pump housing 61 of the high pressure pump 60, and welded to its inner peripheral surface in close contact with the welding step 21 of the welding edge 20. It is formed as a welded area by forming a close contact section with the step side of the step 21. The bolt hole 15 is made of left and right bolt holes drilled in each of the left and right sections of the plate body, and the left and right bolts The bolt axis 42 of the bolt 40 passes through each of the holes.

For example, the plate reference surface 16 forms the lower surface 11B of the plate body and is aligned with the inner peripheral surface of the housing hole 13 and the step side of the welded step 21 that forms a close contact section. Therefore, the protruding height of the plate seating surface 18 and the plate protruding surface 19, which are formed to protrude from the plate reference surface 16, is formed to be smaller than the gap t (see FIG. 1), so that the mounting plate ( A multi-faceted contact portion 50 may be formed by elastic deformation of 10).

For example, the plate seating surface 18 is formed as left and right plate seating surfaces that protrude to have a height difference from the plate reference surface 16 in each of the left and right sections of the plate body, and the left and right plate seating surfaces are Each is composed of a semicircular border protruding structure facing the half hole section in the area outside the hole among the peripheral areas of the bolt hole 15.

And the plate protrusion surface 19 is formed as left and right plate protrusion surfaces that protrude to have a height difference from the plate reference surface 16 in each of the left and right sections of the plate body, and each of the left and right plate protrusion surfaces It consists of a straight bar protruding structure facing the half-hole section in the area inside the hole among the surrounding areas of the bolt hole 15.

In particular, the protruding height of the plate protruding surface 19 is formed to be higher than the protruding height of the plate seating surface 18, thereby forming a height difference between the protruding plate surface 19 and the plate seating surface 18.

In addition, the protruding surface of the plate 19 is formed on the mounting plate 10 by a press method, thereby creating a recessed groove around the bolt hole 15 of the plate body, and this peripheral recessed groove is formed on the bolt head of the bolt 40 ( Among the seating surfaces in contact with 41), the seating surface in the area close to the pump housing 61 is made smaller, and the smaller seating surface distributes the axial force of the bolt 40 to the area far from the pump housing 61. By doing this, it is possible for the weld joint using the close contact section between the step side of the weld edge 20 and the inner peripheral surface of the housing hole 13 to further distribute the load received by the bolt axial force.

Meanwhile, FIGS. 3 to 5 show the bolt 40 and the multi-faceted contact portion 50 receiving the bolt axial force F when the high pressure pump mounting device 1 is assembled with the high pressure pump 60 on the engine adapter 30. represents the stress state.

Referring to Figure 3, the multi-surface contact portion 50 is composed of three first, second, and third contact surfaces (51, 52, and 53).

For example, the first contact surface 51 is formed by bringing the housing bottom surface 23 of the pump housing 61 into close contact with the plate assembly surface 35 of the engine adapter 30, and the second contact surface 52 is formed by mounting. It is formed by bringing the plate seating surface 18 of the plate 10 into close contact with the plate assembly surface 35 of the engine adapter 30, and the third contact surface 53 is the plate protruding surface 19 of the mounting plate 10. It is formed by bringing the plate assembly surfaces 35 of the engine adapter 30 into close contact. In this case, the housing bottom surface 23 of the first contact surface 51 has a stepped structure with the lower part of the pump housing 61 of the high pressure pump 60 below the weld step 21 of the weld edge 20. It comes true.

Therefore, based on the bolt hole 15 of the mounting plate 10, the first contact surface 51 is the area furthest from the bolt hole (i.e., the area toward the pump housing), and the second contact surface 52 is The third contact surface 53, the area closest to the bolt hole, is located between the first and second contact surfaces 51 and 52 near the bolt hole.

Referring to FIG. 4, the first contact surface 51 forms a state in which the bottom surface of the housing 23 is in contact with the plate assembly surface 35 when the high pressure pump 60 is assembled with the engine adapter 30, thereby forming a bolt. It is formed in a close contact state before fastening (40).

Subsequently, by fastening the bolt 40, the mounting plate 10 receives the bolt axial force F, thereby forming a second contact surface 52 and then a third contact surface 53.

That is, the second contact surface 52 is located further away from the pump housing 61 of the high pressure pump 60 than the third contact surface 53 based on the bolt hole 15, so that it is mounted by the bolt axial force (F). The bolt hole section of the plate 10 is first deformed, and this deformation of the bolt hole section causes the plate seating surface 18 to be assembled by pressing the plate seating surface 18 with the plate assembly surface 35 of the engine adapter 30. The second contact surface 52 is formed by close contact with the surface 35.

Then, when the deformation of the mounting plate 10 becomes larger due to an increase in the bolt axial force (F) and progresses to deformation of the plate body, this deformation of the plate body is caused by the plate assembly surface 35 of the engine adapter 30. By pressing 19), the third contact surface 53 is formed by close contact between the plate protruding surface 19 and the plate assembly surface 35.

In this way, the multi-surface contact part 50 is formed so that the first contact surface 51, the second contact surface 52, and the third contact surface 53 are formed through the bolt axial force (F) during the assembly and bolt fastening process of the high pressure pump 60. They are formed sequentially, and in particular, the third contact surface 53 is formed with a greater bolt axial force than the first and second contact surfaces 51 and 52, so that the bolt axial force F is excessively increased during the bolt fastening operation or the high pressure pump 60 ) can absorb all the increase in operating load when driving.

Referring to FIG. 5, the multi-surface contact portion 50 is capable of distributing the bolt axial force to the first, second, and third contact surfaces (51, 52, and 53), thereby welding the welding edge 20 of the pump housing 61 and the mounting plate ( 10), the stress of the weld joint (see FIG. 1) is reduced, and the stress on the bolt head seating surface of the mounting plate 10 is distributed. In particular, the bolt 40 also has a bolt head 41 that presses the mounting plate 10. Stress reduction is possible.

In this way, the multi-surface contact part 50 is a three-point contact surface type mounting structure of the first, second, and third contact surfaces (51, 52, and 53), and is capable of providing a high-pressure fuel system for high-efficiency engines, which was not possible in the existing two-point contact surface mounting structure. High operating loads, small mounting plates (or flanges), robustness of flange welds, and reduced flange thickness are all possible.

Meanwhile, referring to FIG. 6, the mounting plate 10 includes the housing bottom surface 23 of the first contact surface 51, the plate seating surface 18 of the second contact surface 52, and the plate material of the third contact surface 53. It indicates that among the protruding surfaces 19, the housing bottom surface 23 and the plate protruding surface 19 may have a deformed structure.

Referring to the deformed structure of the plate protruding surface 19 as an example, the plate protruding surface 19 may be changed into a plate protruding surface 19-1 having a different shape at the same location.

In particular, the plate protrusion surface (19-1) is composed of two first and second protrusions (19-1A, 19-1B) spaced apart at regular intervals, and the first and second protrusions (19-1A, 19-1B) ) is formed in a hemispherical protruding structure or a circular cross-sectional structure at the bottom of the plate body of the mounting plate 10.

Therefore, the first and second protrusions (19-1A, 19-1B) receive the bolt axial force (F) and implement the action and effect of the third contact surface (53) in the same way as the plate protruding surface (19) of FIG. 2.

On the other hand, referring to the deformed structure of the housing bottom surface 23, the housing bottom surface 23 is replaced by a plate bottom surface 17 formed directly on the plate reference surface 16 of the mounting plate 10, thereby forming a multi-face contact portion ( 50) may be composed only of the mounting plate 10 without being connected to the pump housing 61 of the high pressure pump 60.

In particular, the plate bottom surface 17 is formed to fit the diamond-shaped plate body of the mounting plate 10 with a partial arc section so as to form a concentric circle with the housing hole 13.

Therefore, the plate bottom surface 17 divides the mounting plate 10 into upper and lower sections with respect to the bolt hole 15, and is formed to be symmetrical above and below with respect to the housing hole 13, thereby forming the housing hole 13 and the housing hole 13. It is located in the area furthest from the bolt hole 15 in the proximate position.

From this, the plate bottom surface 17 receives the bolt axial force F, and the plate assembly surface 35 is formed in a state in which the high pressure pump 60 is assembled with the engine adapter 30, as shown in the housing bottom surface 23 of FIG. 3. By forming a contact state, the same actions and effects as the first contact surface 51 are realized.

As described above, the multi-surface contact type high pressure pump mounting device 1 according to the present embodiment has a mounting plate 10 combining the engine adapter 30 and the high pressure pump 60, and the bolt axial force of the bolt 40 ( F) is transformed into a state in which the gap (t) of the first contact surface 51 with respect to the engine adapter 30 is narrowed, and the second contact surface 52 and the third contact surface 53 are connected to the mounting plate 10. In a state in which they are spaced apart from each other, a fixing force is formed through a difference in the contact order with the engine adapter 30 due to the difference in the strength of the bolt axial force, thereby alleviating excessive axial force of the bolt that exceeds the specified torque through the increased surface contact section, especially the third contact surface. (53) acts as an additional seating surface to reduce the load on the weld joint and bolt by distributing the load of excessive bolt axial force to both sides, thereby preventing damage to the flange/bolt while responding to the strengthened mounting environment caused by high pressure of the fuel system. and destruction phenomena can also be prevented.

1: High pressure pump mounting device
10: Mounting plate 11A, 11B: Upper/lower surface
13: Housing hole 15: Bolt hole
16: Plate reference surface 17: Plate bottom surface
18: plate seating surface 19: plate protruding surface
19-1: Plate protrusion surface 19-1A, 19-1B: 1st and 2nd protrusions
20: Weld border 21: Weld step
23: Housing bottom surface 30: Engine adapter
31: mounting hole 33: pump hole
35: Plate assembly surface 40: Bolt
41: bolt head 42: bolt axis
50: Multi-surface contact portion 51, 52, 53: 1st, 2nd, 3rd contact surface
60: high pressure pump 61: pump housing
62: Piston 63: Spring
70: Cam

Claims (14)

A mounting plate that is fixed to the high-pressure pump by narrowing the gap with the engine adapter by deforming the bolt axial force of the bolt screwed to the engine adapter on which the high-pressure pump is assembled, and
It includes a multi-faceted contact part consisting of a first contact surface forming the gap, a second contact surface and a third contact surface that are provided on the mounting plate at a distance from each other and change the contact order with the engine adapter due to differences in bolt axial force strength; ;
A high-pressure pump mounting device, wherein the second contact surface and the third contact surface protrude at different heights, using the lower surface of the mounting plate as a reference surface, and have a height difference.
The high-pressure pump mounting device according to claim 1, wherein the second contact surface and the third contact surface are formed on the lower surface of the mounting plate.
delete The high-pressure pump mounting device according to claim 1, wherein the height of the third contact surface is formed to be greater than the height of the second contact surface.
The method according to claim 2, wherein the second contact surface has a semicircular border protruding structure,
A high-pressure pump mounting device, wherein the third contact surface is formed of one of a straight bar protruding structure, a hemispherical protruding structure, and a circular cross-sectional structure.
The high-pressure pump mounting device according to claim 5, wherein the straight bar protruding structure is formed by a press method to form a concave groove around the bolt hole of the mounting plate.
The high-pressure pump mounting device according to claim 5, wherein the hemispherical protruding structure or the circular cross-sectional structure is formed of first protrusions and second protrusions spaced apart from each other.
The high-pressure pump mounting device according to claim 2, wherein the second contact surface and the third contact surface are formed around a bolt hole of the mounting plate through which the bolt penetrates.
The method of claim 8, wherein the second contact surface is located in a section outside the hole away from the housing with the bolt hole as the center,
A high-pressure pump mounting device, characterized in that the third contact surface is located in a section inside the hole close to the housing with the bolt hole as the center.
The method according to claim 1, wherein the first contact surface is formed as a bottom surface of the housing of the high pressure pump,
A high-pressure pump mounting device, characterized in that the bottom surface of the housing is located below the weld edge where the mounting plate is joined to form the gap.
The method according to claim 10, wherein the weld edge protrudes from the outer diameter of the pump housing of the high pressure pump to form a weld step,
The welding step is a high-pressure pump mounting device, characterized in that it forms a housing hole and a welding fixture of the mounting plate.
The high-pressure pump mounting device according to claim 1, wherein the bolt penetrates the bolt hole of the mounting plate and is screwed to the mounting hole of the engine adapter.
The high-pressure pump mounting device according to claim 1, wherein the difference in intensity of the bolt axial force is generated by a fastening torque that generates the bolt axial force.
The method according to claim 1, wherein the engine adapter forms a pump hole,
The high-pressure pump is a high-pressure pump mounting device, characterized in that the lower part of the pump housing is assembled with the pump hole.