JP2019002294A - Fuel system protection device and internal combustion engine having the same - Google Patents

Abstract

To provide a technology which can further improve the protection performance of a fuel system component without causing an increase of the number of part items and weight.SOLUTION: An extension part 34 having a protruding piece 34a is arranged at a protector 20, and when the protector 20 is attached to an internal combustion engine 1, the protruding piece 34a opposes a recess 60b in a position separating from the recess 60b of an existing fastening bolt 60 by a prescribed distance. By this constitution, when the protector 20 is deformed due to a collision to a radiator shroud 92 and the protector 20 of an intake manifold 14 accompanied by a collision of a vehicle, the protruding piece 34a of the extension part 34 of the protector 20 can abut on the inside of the recess 60b of the opposing fastening bolt 60. The protector 20 can be thereby favorably suppressed from being displaced to any direction including vertical and left-and-right directions with respect to the internal combustion engine 1, and a fuel system component 12 can be surely protected.SELECTED DRAWING: Figure 16

Description

  The present invention relates to a fuel system protection device for protecting a fuel system component including a fuel pipe and configured to supply fuel to a combustion chamber of an internal combustion engine, and an internal combustion engine including the same.

  Japanese Patent Application Laid-Open No. 2007-239710 (Patent Document 1) covers and protects fuel system components in order to prevent components in the engine room from colliding with fuel system components such as fuel injection valves and fuel pipes in the event of a vehicle collision. A fuel system protection device with a protector is described.

  In the fuel system protection device, the tip portion of the protruding block having a tip portion recessed in a substantially L-shaped cross section is opposed to the corner portion of the abutment seat portion provided on the flange portion of the intake manifold attached to the cylinder head side wall. The protruding block is fixed to the inside of the protector with a plurality of bolts, so that when the protector is deformed due to an excessive external input, the tip of the protruding block is placed at the corner of the abutment seat of the intake manifold. It is made to contact | abut and the shift | offset | difference of the engine up-down direction of a protector is suppressed favorably. Thereby, since a protector can be reliably faced | matched in the predetermined position of an intake manifold, fuel system components can be protected more reliably.

JP 2007-239710 A

  However, in the fuel system protection device described in the above-mentioned publication, although the shift of the protector in the vertical direction of the engine can be suppressed, there is no mention of any other direction, for example, the shift in the horizontal direction of the engine. There is still room for improvement in terms of further improving the protection performance of the parts. Further, in the fuel system protection device described in the above-mentioned publication, it is necessary to provide a projecting block and an abutment seat portion in order to suppress the vertical displacement of the protector, which leads to an increase in the number of parts and an increase in weight.

  The present invention has been made in view of the above, and an object of the present invention is to provide a technique capable of further improving the protection performance of fuel system components without causing an increase in the number of components or an increase in weight. To do.

  The fuel system protection device of the present invention and the internal combustion engine equipped with the same take the following measures in order to achieve the above object.

  According to a preferred embodiment of the fuel system protection device according to the present invention, a fuel system protection device for protecting a fuel system component configured to supply fuel to a combustion chamber of an internal combustion engine including a fuel pipe is configured. . The fuel system protection device includes a protector having an arch portion formed so that the shape when viewed from one side in the extending direction of the fuel pipe is substantially arched, and a member constituting the internal combustion engine. And a fastening bolt to be fastened. The protector is configured such that at least a part of the fuel system component can be accommodated inside the arch portion. The arch part has an extension part configured to extend in a direction opposite to the convex direction of the arch part. Further, the fastening bolt is formed with a recess having walls in at least four directions on the head. And when a protector is attached to an internal combustion engine, it is comprised so that the front-end | tip of an extension part may face the said recessed part in the state spaced apart from the recessed part by the predetermined distance.

  Here, the “substantially arched shape” in the present invention corresponds to a curved shape including an arc shape in which the fuel pipe side is a concave portion, but preferably includes a bent shape in which the fuel pipe side is a concave portion. Further, the “inside of the arch portion” in the present invention corresponds to the side facing the side where the internal combustion engine is arranged when the protector is attached to the internal combustion engine.

  According to the present invention, in a case where the protector is deformed due to an external excessive input with a simple configuration in which the tip of the extending portion provided on the arch portion of the protector is merely abutted against the recess formed on the head of the fastening bolt. It is possible to satisfactorily suppress the shift of the protector in four directions, for example, the engine up-down direction and the engine left-right direction. Thereby, protection of the fuel system component by a protector can be implement | achieved still more reliably. Here, “when the protector is deformed” suitably includes not only the case where the shape of the protector is literally deformed but also the case where a part of the protector is broken. In addition, since the recessed part which abuts the extension part of a protector is the structure formed in the head of a fastening bolt, it is necessary to provide the part only for the purpose of suppressing the shift | offset | difference of the protector in the engine up-down direction and engine left-right direction. There is no. As a result, the number of parts and the weight are not increased. In addition, as a fastening bolt, by using a so-called upset bolt in which the head is molded into a predetermined shape and at the same time a recess is formed in the head, the number of man-hours required for managing parts compared to when using a dedicated fastening bolt is used. Can be reduced.

  According to the further form of the fuel system protection device according to the present invention, the recess is formed in a substantially circular shape when viewed from one side in the axial direction of the fastening bolt.

  According to this embodiment, it is possible to satisfactorily suppress the protector from being displaced not only in the engine up-down direction and the engine left-right direction but also in all directions of the engine.

  According to the further form of the fuel system protection device which concerns on this invention, the arch part has a rigidity improvement part which improves the rigidity of the said arch part. And the extension part is provided in the vicinity of the said rigidity improvement part.

  According to this embodiment, the rigidity of the extension portion is improved by the rigidity improvement portion for improving the rigidity of the arch portion, which is reasonable.

  According to the further form of the fuel system protection device according to the present invention, the arch portion extends in the cylinder arrangement direction of the internal combustion engine. The rigidity improving portion is configured as a bent portion formed by folding back at least one edge portion in the extending direction of the arch portion to the outside of the arch portion. Here, “the outside of the arch portion” in the present invention corresponds to the side facing the side opposite to the side where the internal combustion engine is arranged when the protector is attached to the internal combustion engine.

  According to this embodiment, the rigidity improving portion can be secured with a simple configuration in which at least one edge portion in the extending direction of the arch portion is folded back to the outside of the arch portion.

  According to the further form of the fuel system protection device according to the present invention, the extending part is provided closer to the bent part than the central part in the extending direction of the arch part.

  According to this embodiment, since the extending portion is provided at a position closer to the bent portion as the rigidity improving portion, the rigidity of the extending portion can be effectively improved.

  According to the further form of the fuel system protection device according to the present invention, the bent portion is provided with a protrusion configured to protrude further toward the outside of the arch portion than the bent portion. .

  According to this embodiment, when a component in the engine room, for example, a radiator or a radiator shroud collides with the protector of the fuel system protection device at the time of a vehicle collision, the component such as the radiator or the radiator shroud can be destroyed by the protrusion. it can. Thereby, it is possible to satisfactorily prevent the parts such as the radiator and the radiator shroud from colliding with the fuel system parts.

  According to the further form of the fuel system protection device according to the present invention, the protector has a main body portion including the arch portion and an attachment portion integrally formed with the main body portion to fasten the main body portion to the internal combustion engine. doing. And the main-body part is connected with the aspect which is easy to fracture | rupture with respect to an attaching part.

  According to this embodiment, a part of the collision energy generated at the time of the vehicle collision can be absorbed by the breakage of the main body portion and the attachment portion. Thereby, the protection performance of the fuel system components by the fuel system protection device can be further improved.

  According to the further form of the fuel system protection device according to the present invention, the main body portion is superposed and joined to the attachment portion so as to be sheared and destroyed with respect to the attachment portion by an input at the time of a vehicle collision.

  According to this form, the structure which attaches a main-body part with the aspect which is easy to fracture | rupture with respect to an attaching part can be ensured easily.

  According to the further form of the fuel system protection device according to the present invention, the main body portion is joined to the attachment portion by spot welding.

  According to this form, the structure which attaches a main-body part with the aspect which is easy to fracture | rupture with respect to an attaching part can be ensured more simply.

  According to a preferred embodiment of the internal combustion engine according to the present invention, a cylinder head constituting a combustion chamber, a rocker cover attached to the upper portion of the cylinder head, and a fuel pipe are configured to supply fuel to the combustion chamber. A fuel system component, an intake system component that supplies air to the combustion chamber, and the fuel system protection device according to any one of the above-described aspects of the present invention are provided. The intake system component is configured to cover at least a part of the fuel system component. The fuel system protection device is arranged between the intake system component and the fuel system component, and is configured to cover at least a part of the fuel system component with the arch portion.

  According to the present invention, since the fuel system protection device according to any one of the above-described aspects is provided, the same effect as that produced by the fuel system protection device according to the present invention, for example, the fuel system component by the protector It is possible to achieve an effect that the protection can be realized more reliably and an effect that an increase in the number of parts and an increase in weight can be prevented. Further, in addition to the fuel system protection device, the fuel system parts can be protected by the intake system parts. Thereby, the further improvement of the safety | security of the vehicle carrying an internal combustion engine can be aimed at.

  According to the present invention, the protection performance of fuel system components can be further improved without causing an increase in the number of components or an increase in weight.

1 is a schematic configuration diagram showing an outline of a configuration of an internal combustion engine 1 according to an embodiment of the present invention. 1 is a schematic configuration diagram showing an outline of a configuration of an internal combustion engine 1 according to an embodiment of the present invention. It is the top view which looked at the internal combustion engine 1 which concerns on embodiment of this invention from upper direction. FIG. 3 is a side view of the cylinder head 2 as viewed from the side wall 2a including the intake passage 3; 3 is a perspective view showing an external appearance of a fastening bolt 60. FIG. FIG. 4 is an explanatory view showing a state in which an intake manifold 14 is fastened to a cylinder head 2 by fastening bolts 60. 2 is a perspective view showing an outline of a configuration of a protector 20. FIG. It is the four views which looked at the protector 20 from upper direction, a front surface, a back surface, and a side surface. It is the enlarged view which looked at the protector 20 from the side. It is an expansion perspective view which expands and shows the bending part 32 of the protector. It is the arrow enlarged view seen from the arrow A direction of FIG. It is an enlarged view which expands and shows the B section of FIG. It is the enlarged view seen from the arrow C direction of FIG. It is explanatory drawing which looked at a mode that the fuel system component 12 was covered with the protector 20 from the one side of the cylinder row direction. 2 is a perspective view showing a state in which a fuel system component 12 is covered by a protector 20. FIG. It is explanatory drawing which shows each state of the intake manifold 14, the radiator shroud 92, the protector 20, and the fuel system component 12 before the protector 20 deform | transforms. It is explanatory drawing which shows each state of the intake manifold 14, the radiator shroud 92, the protector 20, and the fuel system component 12 at the time of the protector 20 deform | transforming.

  Next, the best mode for carrying out the present invention will be described using examples.

  As shown in FIGS. 1 and 2, the internal combustion engine 1 according to the present embodiment includes a cylinder head 2 (described only in FIG. 2), a rocker cover 4 attached above the cylinder head 2, and a cylinder head. 2, a cylinder block 6 attached below 2, an oil pan 8 attached below the cylinder block 6, and one of the side walls of the cylinder head 2, the cylinder block 6, and the oil pan 8 orthogonal to the cylinder row direction. A front cover 10 fastened to the cylinder head 2, the cylinder block 6 and the oil pan 8 so as to cover the side wall of the cylinder, a fuel system part 12 attached to the cylinder head 2, and a rocker cover so as to cover the fuel system part 12 4 and the fuel system component 12 and the protector 20 so as to cover the protector 20 attached to the An intake manifold 14 attached to the head 2, and a.

  In the internal combustion engine 1 according to the present embodiment, as shown in FIG. 3, the cylinder row direction is in the left-right direction (vertical direction in FIG. 3) orthogonal to the forward traveling direction of the vehicle (right side in FIG. 3). The intake manifold 14 is mounted in a vehicle engine room (not shown) so that the intake manifold 14 is disposed along the front side of the vehicle. A radiator 90 covered with a radiator shroud 92 is installed in the left front corner of the internal combustion engine 1 in the engine room. In this embodiment, for the sake of convenience, the upper side (the rocker cover 4 side) in FIGS. 1 and 2 is defined as “upper” or “upper”, and the lower side (oil pan 8 side) in FIGS. Are defined as “downward” or “lower”. Also, the upper side in FIG. 3 is defined as “left side” or “left side”, and the lower side in FIG. 3 is defined as “right side” or “right side”. Further, the right side in FIG. 3 is defined as “front” or “front side”, and the left side in FIG. 3 is defined as “rear side” or “rear side”.

  The cylinder head 2 is one of the main components constituting the internal combustion engine 1 and is configured in a generally block shape by a die casting method using an aluminum alloy. On the lower surface of the cylinder head 2, as shown in FIG. 4, a recess that constitutes the combustion chamber CC is formed. Further, one side wall 2a along the cylinder row direction among the side walls of the cylinder head 2 is for supplying air or a mixture of hydrocarbon fuel such as gasoline or light oil and air to the combustion chamber CC. An intake passage 3 is opened.

  An attachment flange portion 2b for attaching an intake manifold 14 (not shown) and a protector 20 (not shown in FIG. 4) are fastened to the side wall 2a so as to surround the periphery of the opening of the intake passage 3. Fastening bosses 2c and 2c and an insertion boss portion 2d having an insertion hole through which an injector (not shown) constituting the fuel system component 12 is inserted are provided. A screw hole SH into which the fastening bolt 60 is screwed is formed in the mounting flange portion 2b. The intake manifold 14 is an example of an implementation configuration corresponding to the “intake system component” in the present invention.

  As shown in FIG. 5, the fastening bolt 60 is configured as a flanged hexagonal upset bolt in which a circular recess 60b is simultaneously formed in the head 60a when the hexagonal shape of the head 60a is formed. As shown in FIG. 6, the intake manifold 14 is fastened to the cylinder head 2 by being threadedly engaged with a screw hole SH formed in the mounting flange portion 2 b of the cylinder head 2.

  The fuel system component 12 includes an injector (not shown) that injects hydrocarbon fuel such as gasoline or light oil into the intake passage 3 or the combustion chamber CC, a fuel distribution pipe 12a through which fuel fed from a fuel pump (not shown) flows. Are fixed to the side wall 2a of the cylinder head 2 by bolts (not shown). The fuel distribution pipe 12a is an example of an implementation configuration corresponding to the “fuel pipe” in the present invention.

  The fuel distribution pipe 12a extends in the cylinder row direction of the cylinder head 2 and is configured to distribute and supply fuel to each of the injectors (not shown).

  As shown in FIGS. 1 to 3, the protector 20 extends along the cylinder row direction of the cylinder head 2, and extends through a fuel distribution pipe 12 a that also extends in the cylinder row direction of the cylinder head 2. It is comprised so that it may cover over the substantially whole area of a direction. As shown in FIGS. 7 to 9, the protector 20 includes a main body portion 22 that constitutes a main portion of the protector 20, and a pair of attachment portions 24 that are integrally connected to the main body portion 22 and fastened to the rocker cover 4. 24 and a pair of attachment portions 26 and 26 (described only in FIGS. 8 and 9) integrally connected to the main body portion 22 and fastened to the cylinder head 2. A main-body part is an example of the implementation structure corresponding to the "arch part" in this invention.

  As shown in FIGS. 7 to 10, the main body 22 is formed in an arch shape (substantially U-shaped) when viewed from one side in the extending direction (left-right direction in FIG. 8). As shown in FIG. 2, the fuel system component 12 including the fuel distribution pipe 12a is accommodated inside the arch shape (substantially U-shape). In the present embodiment, the main body portion 22 covers the fuel system component 12 almost in the entire extending direction. The inner side of the main body 22 is defined as a side facing the side where the internal combustion engine 1 is disposed when the protector 20 is attached to the internal combustion engine 1.

  As shown in FIG. 8, the main body portion 22 includes a bent portion 32 and an extending portion 34 provided in the vicinity of the bent portion 32. As shown in FIGS. 7 to 10, the bent portion 32 is configured by folding the edge portion on one end side in the extending direction of the main body portion 22 approximately 90 degrees toward the outside of the main body portion 22. . Here, the outside of the main body portion 22 is defined as a side facing the side opposite to the side where the internal combustion engine 1 is disposed when the protector 20 is attached to the internal combustion engine 1. Thus, the rigidity of the main body 22 can be improved by providing the main body 22 with the bent portion 32. The bent portion 32 is an example of an implementation configuration corresponding to the “rigidity improving portion” in the present invention.

  The bent portion 32 is provided with a protrusion 32 a configured to further protrude toward the outside of the main body portion 22. The protrusion 32 a is provided in the vicinity of the arch-shaped most convex portion, and is configured to protrude in a substantially horizontal direction when the protector 20 is attached to the internal combustion engine 1.

  As shown in FIGS. 8 and 13, the extending portion 34 is integrally formed with the bent portion 32 at one end portion in the extending direction of the main body portion 22. As shown in FIG. 9, the extending portion 34 is configured by extending one end portion (right side in FIG. 9) of the arch shape of the main body portion 22 from the other portion. As shown in FIGS. 11 and 12, a protruding piece 34 a that further protrudes in the extending direction of the extending portion 34 is formed integrally with the portion. The width dimension w (see FIGS. 11 and 13) of the projecting piece 34a is formed to be smaller than the diameter of the recess 60b of the fastening bolt 60. The extending part 34 including the projecting piece 34 a is an example of an implementation configuration corresponding to the “extending part” in the present invention.

  As shown in FIGS. 7 to 9, the pair of attachment parts 24, 24 are joined by spot welding or the like in a state of being superposed on the main body part 22 at the other end of the arch shape of the main body part 22. . As shown in FIG. 14, the pair of attachment portions 24, 24 are configured to extend in a substantially horizontal direction when the protector 20 is attached to the internal combustion engine 1. Further, as shown in FIG. 8, the pair of attachment portions 26 and 26 are integrally provided in the main body portion 22 at a position near the center portion in the extending direction of the main body portion 22. As shown in FIG. 9, the pair of attachment portions 26, 26 extend one end portion of the arch shape of the main body portion 22 so as to be substantially parallel to the pair of attachment portions 24, 24. It is formed in a shape bent approximately 90 degrees in the direction away from the mounting portions 24, 24.

  As shown in FIG. 14, the protector 20 configured in this way has an attachment portion 24 fastened to the upper surface of the rocker cover 4 by a bolt B 1, and a pair of attachment portions 26 and 26 are fastening bosses 2 c and 2 c of the cylinder head 2. By fastening with bolts B <b> 2 (see FIG. 5), it is attached and fixed to the internal combustion engine 1 inside the intake manifold 14 (internal combustion engine 1 side). Thereby, the fuel system component 12 is covered and protected by the protector 20. As shown in FIGS. 1 and 3, most of the protector 20 in the extending direction is covered with the intake manifold 14, but a part including the bent portion 32 is not covered with the intake manifold 14.

  When the protector 20 is attached to the internal combustion engine 1 in this way, the protruding piece 34a of the extending portion 34 of the protector 20 is included in the fastening bolt 60 that fastens the intake manifold 14 to the cylinder head 2 as shown in FIG. It is in a state facing the recess 60b at a position away from the recess 60b of the fastening bolt 60 disposed on the leftmost side (right side in FIG. 15), and the other end of the arch shape of the main body 22 is It is in a state facing the rocker cover 4 at a position separated by a predetermined distance. Further, as shown in FIG. 3, the projecting portion 32 a of the bent portion 32 is in a state of facing the vicinity of the corner portion of the radiator shroud 92. The protector 20 and the fastening bolt 60 are an example of an implementation configuration corresponding to the “fuel system protection device” in the present invention.

  Next, an operation of the internal combustion engine 1 configured as described above, particularly, a state when the fuel system component 12 is protected by the protector 20 when a vehicle equipped with the internal combustion engine 1 collides from the front will be described. When collision energy is applied from the front side of the vehicle toward the rear side of the vehicle due to a collision from the front of the vehicle, components disposed on the front side of the vehicle relative to the fuel system component 12, for example, a radiator 90 including a radiator shroud 92 or an intake manifold. 14 (see FIG. 16) moves or deforms toward the vehicle rear side (see FIG. 17), and a collision load is input to the protector 20 through the radiator 90 including the radiator shroud 92, the intake manifold 14, and the like. Thereby, the protector 20 deform | transforms.

  First, the deformation of the protector 20 due to the radiator shroud 92 colliding with the protector 20 will be considered. The radiator shroud 92 collides with the bent portion 32 of the protector 20 including the protruding portion 32a. Due to the deformation of the protector 20 caused by the collision of the radiator shroud 92 with the bent portion, the projecting piece 34a of the extending portion 34 of the protector 20 has a head 60a of the opposing fastening bolt 60 as shown in FIG. It strikes into the recess 60b. Thus, when the protrusion 34a hits the recess 60b, it is possible to satisfactorily prevent the protector 20 from being displaced in all directions including the vertical and horizontal directions with respect to the internal combustion engine 1 when the protector 20 is deformed. Further, when the radiator shroud 92 collides with the protrusion 32a, the radiator 32 is crushed by the protrusion 32a, so that the collision energy input to the protector 20 can be absorbed well. As a result, the fuel system component 12 accommodated inside the protector 20 can be well protected.

  Next, the deformation of the protector 20 due to the intake manifold 14 colliding with the protector 20 will be considered. When the intake manifold 14 collides with the protector 20, shear failure occurs between the main body portion 22 and the attachment portion 24 of the protector 20. When the main body portion 22 and the attachment portion 24 of the protector 20 are sheared and broken, the main body portion 22 is moved toward the rocker cover 4, and as shown in FIG. It hits the cover 4. As described above, the impact energy input to the protector 20 via the intake manifold 14 is absorbed as the fracture energy required when the main body portion 22 and the mounting portion 24 are sheared and broken, thereby favorably reducing the collision energy. In addition, since the other end of the arch shape of the main body portion 22 is abutted against the rocker cover 4, the fuel system component 12 accommodated inside the protector 20 can be well protected.

  In addition, even when the intake manifold 14 collides with the protector 20, the projecting piece 34 a of the extension 34 of the protector 20 hits the recess 60 b of the head 60 a of the fastening bolt 60, which is opposed to the protector 20. When the protector 20 is deformed, it is possible to satisfactorily suppress the protector 20 from shifting in all directions including the vertical and horizontal directions with respect to the internal combustion engine 1. Thereby, the protection performance of the fuel system component 12 accommodated inside the protector 20 can be further improved.

  According to the internal combustion engine 1 according to the embodiment of the present invention described above, when the protector 20 is provided with the extending portion 34 having the projecting piece 34a, and the protector 20 is attached to the internal combustion engine 1, the projecting piece 34a. Is configured to face the recess 60b at a position away from the recess 60b of the fastening bolt 60 by a collision with the protector 20 such as the radiator shroud 92 or the intake manifold 14 due to a frontal collision of the vehicle. When the protector 20 is deformed, the projecting piece 34a of the extending portion 34 of the protector 20 can be brought into contact with the recessed portion 60b of the opposing fastening bolt 60. Thereby, when the protector 20 deform | transforms, it can suppress satisfactorily that the protector 20 shifts | deviates with respect to the internal combustion engine 1 in all directions including the up-down left-right direction. Moreover, since the fastening bolts 60 configured as flanged hexagonal upset bolts for fastening the intake manifold 14 to the cylinder head 2 are used as the contact points of the protector 20, the number of parts and the weight increase are further increased. This does not lead to an increase in the man-hours for managing parts.

  Further, according to the internal combustion engine 1 according to the embodiment of the present invention, since the radiator shroud 92 is crushed by the protrusion 32a of the bent portion 32 of the protector 20, the collision energy generated at the time of the vehicle collision is reduced by the radiator. It can be absorbed as crushing energy required for crushing the shroud 92, and the collision energy generated in the event of a vehicle collision can be further reduced. Thereby, it is possible to satisfactorily prevent the protector 20 from colliding with the fuel system component 12, and it is possible to more reliably protect the fuel system component 12.

  Furthermore, according to the internal combustion engine 1 according to the embodiment of the present invention, when the intake manifold 14 collides with the protector 20, it is configured to cause shear fracture between the main body portion 22 and the attachment portion 24 of the protector 20. The impact energy input to the protector 20 via the intake manifold 14 can be absorbed as the fracture energy required when the main body portion 22 and the attachment portion 24 are sheared and broken. Thereby, it is possible to satisfactorily prevent the protector 20 from colliding with the fuel system component 12, and it is possible to more reliably protect the fuel system component 12.

  In the present embodiment, the hexagonal upset bolts with flanges are used for all the fastening bolts 60 for fastening the intake manifold 14 to the cylinder head 2. However, the fastening bolts 60 at positions facing the projecting pieces 34 a of the protector 20 are used. Only a flanged hexagonal upset bolt may be used. Further, when the fastening bolt 60 at the position facing the projecting piece 34 a of the protector 20 is configured to use a hexagon bolt with a flange that does not have the same recess 60 b as the other fastening bolt 60, the fastening at the position facing the projecting piece 34 a. What is necessary is just to set it as the structure which provides the recessed part 60b in the head 60a of the volt | bolt 60. FIG.

  In the present embodiment, the recess 60b of the fastening bolt 60 is configured in a circular shape, but the present invention is not limited to this. For example, the recess 60b may be configured in a polygon such as a triangle or a quadrangle.

  In the present embodiment, the edge portion on one end side in the extending direction of the main body portion 22 is configured to provide the bent portion 32 by folding back approximately 90 degrees toward the outside of the main body portion 22. Absent. Any configuration can be used as long as the rigidity of the main body portion 22 can be improved. For example, a rib that protrudes toward the outside of the main body portion 22 may be provided on an edge portion on one end side in the extending direction of the main body portion 22. good.

  In this Embodiment, although it was set as the structure which provides the extension part 34 near the location where the radiator shroud 92 collides among the protectors 20, it is not restricted to this. For example, it is good also as a structure which provides the extension part 34 also in the location where the intake manifold 14 collides among the protectors 20. FIG. In this case, the protruding piece 34 a of the extending portion 34 may be provided at a position facing the recess 60 b of the fastening bolt 60 that fastens the intake manifold 14 to the cylinder head 2. Or you may provide not only the fastening bolt 60 but the recessed part of other bolts, for example, the position facing the recessed part of the volt | bolt for attaching the fuel system component 12 to the cylinder head 2. FIG.

  This embodiment shows an example for carrying out the present invention. Therefore, the present invention is not limited to the configuration of the present embodiment.

1 Internal combustion engine (internal combustion engine)
2 Cylinder head (cylinder head)
2a Side wall 2b Mounting flange part 2c Fastening boss 2d Insertion boss part 4 Rocker cover (rocker cover)
6 Cylinder block 8 Oil pan 10 Front cover 12 Fuel system parts (fuel system parts)
12a Fuel distribution pipe (fuel pipe)
14 Intake manifold (intake system parts)
20 Protector (Fuel system protection device, protector)
22 Body part (arch part, body part)
24 Mounting part (Mounting part)
26 Mounting part 32 Bent part (rigidity improving part, bent part)
32a Projection (projection)
34 Extension part (extension part)
34a Protruding piece (extending part)
60 Fastening bolt (fastening bolt, fuel system protection device)
60a head 60b recess (recess)
90 Radiator 92 Radiator Shroud CC Combustion chamber (combustion chamber)
SH Screw hole B1 Bolt B2 Bolt

Claims (10)

A fuel system protection device for protecting a fuel system component including a fuel pipe and configured to supply fuel to a combustion chamber of an internal combustion engine,
It has an arch part formed so that the shape when viewed from one side in the extending direction of the fuel pipe is substantially arched, and at least a part of the fuel system part can be accommodated inside the arch part A configured protector;
A fastening bolt for fastening a member constituting the internal combustion engine to the internal combustion engine;
With
The arch portion has an extending portion configured to extend in a direction opposite to the convex direction of the arch portion;
The fastening bolt has a concave portion having walls on at least four sides at the head,
The said protector is comprised so that when the front-end | tip of the said extension part is spaced apart from the said recessed part by the predetermined distance when attached to the said internal combustion engine, it may oppose this recessed part. The fuel system protection device according to claim 1, wherein the recess is configured in a substantially circular shape when viewed from one side in the axial direction of the fastening bolt. The arch portion has a rigidity improving portion that improves the rigidity of the arch portion,
The fuel system protection device according to claim 1, wherein the extending portion is provided in the vicinity of the rigidity improving portion. The arch portion extends in the cylinder arrangement direction of the internal combustion engine,
The fuel system protection device according to claim 3, wherein the rigidity improving portion is configured as a bent portion formed by folding back at least one edge portion in the extending direction of the arch portion to the outside of the arch portion. . The fuel system protection device according to claim 4, wherein the extending portion is provided closer to the bent portion than a central portion in the extending direction of the arch portion. The fuel system protection device according to claim 4 or 5, wherein the bent portion is provided with a protrusion configured to protrude further toward the outside of the arch portion than the bent portion. The protector has a main body portion including the arch portion, and an attachment portion integrally formed with the main body portion to fasten the main body portion to the internal combustion engine,
The fuel system protection device according to any one of claims 1 to 6, wherein the main body portion is connected to the attachment portion in a manner that is easily broken. The fuel system protection device according to claim 7, wherein the main body portion is overlapped and joined to the attachment portion so as to be sheared and broken with respect to the attachment portion by an input at the time of a vehicle collision. The fuel system protection device according to claim 8, wherein the main body portion is joined to the attachment portion by spot welding. A cylinder head constituting a combustion chamber;
A rocker cover attached to the top of the cylinder head;
A fuel system component including a fuel tube and configured to supply fuel to the combustion chamber;
An intake system component for supplying air to the combustion chamber;
A fuel system protection device according to any one of claims 1 to 9,
With
The intake system component is configured to cover at least a part of the fuel system component,
The fuel system protection device is disposed between the intake system component and the fuel system component, and is configured to cover at least a part of the fuel system component by the arch portion.

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