JP2005113818A - Protection structure of vehicle engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent damaging of a fuel delivery pipe, which extends among an intake manifold, a throttle body, and an engine body in a horizontal direction of an engine, and a connection part of the fuel delivery pipe and a fuel supply pipe caused by the throttle body or a structural member disposed in a front part of the vehicle, when load is input from the front part of a vehicle. <P>SOLUTION: In a protector member 31, a part fastened to an engine rear side fastening face 3b of a cylinder head 3 with bolts T2, T3, and a delivery pipe protector part 31a disposed among the intake manifold 21, the throttle body 29, and the fuel delivery pipe 47 in the horizontal direction of the engine are integrally formed, so as to protect the connection part 45 of the fuel delivery pipe 47 and the fuel supply pipe 41. The delivery pipe protector part 31a is fastened to a support part 51 of the intake manifold 21 and a middle part of a stay 53 extending from near a connection part of a surge tank 25 and the throttle body 29 toward a cylinder block 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a protection structure for a vehicle engine.

  A structure for protecting a connecting portion between a fuel supply pipe and a fuel delivery pipe in a vehicle engine from an input load at the time of a vehicle collision is disclosed in the following patent document.

  FIG. 6 shows a side view of the engine (FIG. 6A) and a front view (FIG. 6B) as viewed in the vehicle width direction, based on the drawings shown in the document. According to these, the engine is placed horizontally with respect to the vehicle, the resin intake manifold is provided on the front side of the cylinder head constituting the engine body, and the plurality of branch pipes of the intake manifold are arranged in front of the cylinder head in the vehicle. It is fixed above the direction. The intake manifold integrally has an upstream intake pipe that is long in the vehicle width direction through a surge tank disposed in the front part of the cylinder block, and the upstream intake pipe is connected to the end of the engine body in the vehicle width direction. It extends to a position outside the vehicle width direction. As a result, the throttle body is connected to the upstream intake pipe at a position disengaged from the engine body as viewed in the vehicle longitudinal direction. The upstream intake pipe is supported by another bolt on a stay fastened with a plurality of bolts to the end face of the cylinder head in the vehicle width direction. A fuel delivery pipe is disposed between the cylinder head and the intake manifold so as to extend in the vehicle width direction. The fuel delivery pipe is a fuel introduction part in the vicinity of the stay, and the protrusion that extends rearward from the fuel introduction part. A pipe is provided, and a rear end portion of the protruding pipe is provided with a connecting portion for connecting a high pressure fuel supply pipe for supplying fuel from the high pressure fuel pump. Therefore, according to the following Patent Document 1, the stay protects the connecting portion that connects the fuel delivery pipe and the high-pressure fuel supply pipe that supplies fuel from the high-pressure fuel pump.

  By the way, in the structure disclosed in Patent Document 1, the intake manifold is composed of a branch pipe, a surge tank, and an upstream intake pipe, and is a relatively large member in the vertical direction and the horizontal direction as viewed in the vehicle longitudinal direction. It is.

  However, for example, in the case of an engine equipped with a turbocharger, it is necessary to use a short intake pipe length, that is, a compact intake manifold due to the component layout, and in the case of such a compact intake manifold, only a stay as in Patent Document 1 is required. However, it is insufficient as a structure for protecting the fuel delivery pipe and the connecting portion between the fuel delivery pipe and the fuel supply pipe from an input load at the time of a vehicle collision.

  That is, when the intake manifold is made compact as a whole, the throttle body is positioned on the front side of the engine body in the vehicle front-rear direction view, that is, on the front side of the fuel delivery pipe. As a result, when a load is input from the front of the vehicle, a relatively rigid massive throttle body may be retracted to the engine body due to the parts arranged on the front side of the vehicle, possibly damaging the fuel delivery pipe. There is.

  Similarly to the above, in the case of a structure in which a compact intake manifold is connected to the throttle body, the connecting portion that connects the fuel delivery pipe and the high-pressure fuel supply pipe that supplies fuel from the high-pressure fuel pump is located in front of the vehicle. Since the intake upstream pipe located is not provided, the protection by the stay becomes insufficient. Therefore, a new protection structure for preventing damage due to components arranged on the front side of the vehicle is also required for the connecting portion that connects the fuel delivery pipe and the high-pressure fuel supply pipe that supplies fuel from the high-pressure fuel pump.

JP 2001-193601 A

  As described above, the present invention has a structure in which a compact intake manifold having a short intake length and a throttle body are connected and arranged in front of the vehicle from the engine body, and when there is an input load from the front of the vehicle, The fuel delivery pipe extending in the engine longitudinal direction between the engine body and the connecting portion between the fuel delivery pipe and the fuel supply pipe are prevented from being damaged by the throttle body or a structure disposed in front of the vehicle. Provide a protective structure.

  The first configuration of the vehicle engine protection structure according to the present invention is an in-line multi-cylinder in which cylinders are arranged in the vehicle width direction, one in the vehicle width direction is the front side of the engine, and the other is the rear side of the engine. An intake manifold comprising a plurality of branch pipes mounted on a vehicle, having one end connected to the vehicle front side surface of the cylinder head and the other end extending forward of the vehicle and then bent downward and connected to the surge tank section And a fuel delivery pipe extending in the longitudinal direction of the engine below the connecting portion between the cylinder head and the intake manifold, and connected to the engine rear side of the surge tank and disposed in front of the fuel delivery pipe in the vehicle. The throttle body, the fuel supply pipe connected to the rear side of the engine of the fuel delivery pipe, and the periphery of the connection between the fuel delivery pipe and the fuel supply pipe The protector member is disposed on the front side of the vehicle with respect to the connecting portion between the fuel delivery pipe and the fuel supply pipe, and is fastened by the fastening member on the rear side of the engine in the cylinder head. The protector member is disposed at least between the throttle body and the fuel delivery pipe in the longitudinal direction of the vehicle, and includes a branch pipe portion on the engine rear end side of the intake manifold, a surge tank portion, and a throttle body. The delivery pipe protector part fastened by the fastening member in the vicinity of the connecting part is integrally formed.

  According to the first configuration, the protector member is made of metal, and is fastened by the fastening member on the rear side of the engine in the cylinder head so as to protect the periphery of the connecting portion between the fuel delivery pipe and the fuel supply pipe. In addition, the protector member is integrally formed with a delivery pipe protector portion, and this delivery pipe protector portion is disposed between the throttle body and the fuel delivery pipe in the longitudinal direction of the vehicle, and the intake manifold engine. It is fastened by a fastening member between the branch pipe portion on the rear end side and the vicinity of the connection portion between the surge tank portion and the throttle body. That is, the protector member is fastened by the cylinder head, the branch pipe portion of the intake manifold, and the vicinity of the connection portion between the surge tank portion and the throttle body, and is disposed in the throttle body or the vehicle front in the event of a vehicle front collision. Collision protection of the fuel delivery pipe connection portion of the fuel delivery pipe and the delivery pipe main body can be performed with a single protector member against retreat of the member or the like.

  Further, according to the first configuration, the intake manifold has a structure in which the throttle body is connected to the surge tank portion. In such a structure, since the weight of the throttle body is applied as a downward load to the end of the surge tank portion to which the throttle body is connected on the rear side of the engine, it is necessary to increase the support strength. On the other hand, in the first configuration, the protector member is fastened to the cylinder head and the branch pipe of the intake manifold, and further connected to the vicinity of the connection portion between the surge tank portion and the throttle body. That is, the intake manifold including the throttle body is supported by the protector members fastened at the plurality of locations, and the support strength can be improved. The vicinity of the connection portion between the surge tank and the throttle body is the vicinity of the center of gravity when the intake manifold and the throttle body are assembled, and it is effective to improve the support strength.

  Further, the effect of improving the support strength can suppress the backward movement of the throttle body in the event of a vehicle front collision, and can further enhance the effect of protecting the fuel delivery pipe.

  In the second configuration related to the present invention, the delivery pipe protector portion is formed in a plate shape having a substantially arc-shaped cross section and has a reinforcing rib.

  According to the second configuration, since the delivery pipe protector portion is formed in a plate shape having a substantially arc-shaped cross section, it is relatively lightweight, and has a reinforcing rib, so that the strength and rigidity are high, and the fuel delivery pipe is protected. Function can be enhanced.

  In the third configuration related to the present invention, a stay fastened to the cylinder block is provided in the vicinity of the connection portion between the intake manifold and the throttle body, and a delivery pipe protector is fastened to the middle portion of the stay. is there.

  According to the third configuration, the stay is configured to connect the vicinity of the connection portion between the intake manifold and the throttle body and the cylinder block, and to fasten the delivery pipe protector portion. Therefore, the support strength of the intake manifold can be further improved, and the support strength of the protector member can be increased.

  According to a fourth configuration of the present invention, the delivery pipe protector portion is supported by fastening a fastening member from the engine rear side toward the engine front side with respect to the intake manifold.

  According to the fourth configuration, when the delivery pipe protector is assembled to the intake manifold with a fastening member such as a bolt in the vehicle front-rear direction, the branch pipe to each cylinder of the intake manifold is installed as an obstacle. Although it is difficult, since it is assembled with bolts from the rear side of the engine to the front side of the engine with respect to the intake manifold, there is no obstacle, and the assembly workability can be improved.

  According to a fifth configuration of the present invention, the intake manifold is made of a light alloy.

  According to the fifth configuration, since the intake manifold is made of a light alloy, the rigidity is higher than that of the resin intake manifold, so that the protection performance of the fuel delivery pipe can be improved by itself, and the protector The support strength of the member to the intake manifold can be further improved.

  As described above, according to the protector member of the present invention, in a structure in which a compact intake manifold having a short intake length and a throttle body are connected and arranged in front of the vehicle from the engine body, when there is an input load from the front of the vehicle, The fuel delivery pipe that extends in the longitudinal direction of the engine between the manifold and the throttle body and the engine body, and the connecting portion between the fuel delivery pipe and the fuel supply pipe are damaged by the throttle body and structural members arranged in front of the vehicle. In addition, it is possible to provide a protective structure that prevents the occurrence of the failure, and it is possible to improve the support strength by effectively supporting the intake manifold including the throttle body in the vicinity of the position of the center of gravity.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a vehicle front view of an engine according to the present invention, FIG. 2 is a side view from the rear side of the engine of FIG. 1, FIG. 3 is a perspective view of a protector member according to the present invention, and FIG. The figure which shows the detail of a member, FIG. 5 is AA sectional drawing in FIG. Hereinafter, the description may be made with reference to a plurality of drawings. In this case, not all drawings to be referred to are denoted by reference numerals, but any of the drawings is denoted by a reference numeral, which should be understood below.

  In FIG. 1, an engine 1 is an in-line four-cylinder direct-injection engine, which is placed horizontally with respect to a vehicle, that is, in a direction in which four combustion chamber cylinders are arranged in the vehicle width direction. The engine 1 is provided with a turbocharger (not shown), but the present invention is not limited to this, and no particular description is added in the present embodiment.

  The engine 1 has a cylinder head 3 and a cylinder block 5, and the cylinder head 3 is disposed on the upper end surface of the cylinder block 5 via a gasket (not shown) and is well known by a tension bolt (not shown). It is concluded by the method. A cylinder head cover 7 is disposed and fixed on the upper portion of the cylinder head 3 via a seal member (not shown).

  For example, a plurality of members such as an air conditioner compressor 9 are fixed to the front side of the engine of the cylinder block 5, and a pulley member 11 and a belt member 13 for driving these members are provided. On the other hand, a cell motor 15 is fixed on the engine rear side of the cylinder block 5.

  An intake manifold 21 is fixed to the front side of the cylinder head 3 by a plurality of fastening members T1.

  In the present embodiment, the intake manifold 21 is a cast material made of a light alloy, for example, an aluminum alloy, but is not limited to this in terms of the gist of the present invention.

  The intake manifold 21 includes a surge tank 25 connected to the throttle body 29, and branch pipes 23a, 23b, 23c, and 23d branched from the surge tank 25. These branch pipes are connected to the branch pipe 23a from the front side of the engine. The branch pipe 23b, the branch pipe 23c, and the branch pipe 23d are arranged in this order. Reference numeral 27 denotes a portion called an upstream connecting pipe between the surge tank 25 and the throttle body 29, and the upstream connecting pipe 27 is a part of the surge tank 25.

  As shown in FIG. 2, the branch pipes 23 a, 23 b, 23 c, and 23 d have shapes that extend upward from the upper portion of the surge tank 25 and then bend toward the vehicle front side surface portion 3 c of the cylinder head 3. In addition, a substantially triangular support portion 51 protruding downward is integrally formed from the lower part of the branch pipe 23d arranged on the most rear side of the engine.

  As shown in FIGS. 1 and 2, the intake manifold 21 has a stay 53 that extends from the portion near the throttle body 29 below the upstream connecting pipe 27 that is a part of the surge tank 25 to the lower rear side of the vehicle. The stay 53 is fixed to the vehicle front side surface portion 5b of the cylinder block 5 by a fastening member T7.

  The position where the stay 53 extends from the upstream connecting pipe 27 is set for the following reason. That is, when the intake manifold 21 is not assembled with the throttle body 29, the position of the center of gravity in the longitudinal direction of the engine is the surge tank portion 25 because the intake manifold 21 is substantially symmetrical in the longitudinal direction of the engine. Near the center of. Here, when the throttle body 29 is assembled to the surge tank 25, the center of gravity moves to the throttle body 29 side. That is, the upstream connection pipe 27 that is a part of the surge tank portion 25 is located close to the throttle body 29. Therefore, if the position where the stay 53 is provided is in the vicinity of the center of gravity when the intake manifold 21 and the throttle body 29 are assembled, the support strength can be effectively increased against engine vibration.

  As will become clear later, a protector member 31 is fastened to the middle portion of the stay 53, and this protector member 31 has a structure fastened to the cylinder head 3 and the intake manifold 21. The upstream side connecting pipe 27 and the throttle body 29 which are a part of the above are strongly supported not only by the stay 53 but also indirectly by the protector member 31.

  Since the throttle body 29 is a member that precisely controls the amount of air related to the combustion of the engine 1, it is necessary to strongly support it and suppress vibrations as much as possible, and since it is a metal member, it is relatively heavy. From the viewpoint of weight balance including the intake manifold 21 when connected to the intake manifold 21, it is necessary to enhance the supportability. Therefore, the stay 53 also supports the throttle body 29 together with the upstream connecting pipe 27 that is a part of the surge tank 25, and has an effect of maintaining an appropriate vibration and weight balance.

  Next, the structure of the protector member 31 is demonstrated based on FIG. 3 and FIG.

FIG. 3 is a perspective view of the protector member 31 from the engine front side. 4A is a front view of the protector member 31 from the front of the vehicle, FIG. 4B is a view in the Z direction in FIG. 4A, and FIG. 4C is FIG. It is XX sectional drawing in A).

  According to FIG. 3, the protector member 31 includes a protector part (delivery pipe protector part) 31a for protecting the engine rear side of the fuel delivery pipe 47 (see FIG. 1), an engine rear side end part of the fuel delivery pipe 47 and the fuel. A support frame body portion 31e that protects the periphery of the connection portion 45 (see FIG. 1) with the supply pipe 41 is provided.

  The protector portion 31a is formed in a substantially arc-like plate shape so as to bulge forward of the vehicle in a cross-sectional view in the engine longitudinal direction (see FIG. 4C).

  Further, a reinforcing rib 31b extending toward the front of the vehicle is integrally formed on the periphery of the protector portion 31a.

  Therefore, since the protector member 31 is plate-shaped and has the reinforcing ribs 31b, the protector member 31 is relatively light in weight and has a high strength and rigidity.

  Furthermore, the protector part upper support part 31c and the protector part lower support part 31d which go downward are integrally formed in the engine front side edge part of the protector part 31a, and the protector part lower support part 31d goes downward. The protector portion lower support portion 31d is provided with bolt insertion holes H5 and H6 extending in the longitudinal direction of the engine (see FIG. 4A).

  The support frame body portion 31e includes a front frame portion 31i that is an engine rear side end portion of the protector portion 31a, an upper frame portion 31f that is directed from the upper portion of the front frame portion 31i toward the cylinder head 3, and a cylinder of the upper frame portion 31f. A lower frame portion that connects the lower side portion 31b of the side frame portion 31g, the lower end portion 32b of the side frame portion 31g, and the lower end portion 32b and the lower portion of the front side frame portion 31i from the upper end portion 32a on the head 3 side. By 31h, it is set as the shape which has the opening k. A fastening portion 32c is provided in the middle of the lower frame portion 31h (see FIG. 4B).

  The upper end portion 32a and the lower end portion 32b are respectively provided with bolt insertion holes H2 and H3 extending in the front-rear direction of the engine, and a screw hole H4 is provided on the surface of the fastening portion 32c on the engine rear side. (See FIG. 4A).

  The shape of the protector member 31 has been described above. Based on this, the structure for attaching the protector member 31 to the cylinder head 3 and the like will be described in detail with reference to FIGS.

  According to FIG. 1, the engine rear side end surface of the cylinder head 3 is composed of a rear end surface portion 3 a and a fastening surface portion 3 b provided to protrude further to the engine rear side at a lower portion of the rear end surface portion 3 a. A downward extension line of the rear end surface portion 3 a of the cylinder head 3 substantially coincides with the engine rear side end surface portion 5 a of the cylinder block 5.

  The protector portion 31a of the protector member 31 is located on the vehicle front side of the cylinder head 3 and the cylinder block 5, and on the vehicle rear side of the surge tank 25 of the intake manifold 21, from the rear portion of the cylinder head 3 to the rear end surface portion 3a. And it is provided so as to protrude further to the engine rear side than the fastening surface portion 3 b and straddle the cylinder head 3 and the cylinder block 5.

  As can be seen from FIGS. 1 and 2, the protector member 31 is fastened with bolts that are fastening members at a plurality of locations. That is, the upper end portion 32a and the lower end portion 32b (see FIG. 3) of the protector member 31 abut against the fastening surface portion 3b of the cylinder head 3, and are fastened by bolts T2 and T3, respectively, from the rear side of the engine. The upper support portion 31c (see FIG. 3) is fastened from the rear side of the engine by a support portion 51 and a bolt T5 protruding downward from the lower portion of the branch pipe 23d in the intake manifold 21, and further, the protector portion lower support portion 31d (see FIG. 3). ) Is fastened by bolts T6 from the rear side of the engine in the middle of the stay 53.

  Accordingly, the protector member 31 itself has a structure having the reinforcing rib 31b, and the structure in which the protector member 31 is fastened to the cylinder head 3 and the intake manifold 21 by a total of four bolts distributed in the longitudinal direction of the engine. Therefore, the structure is extremely high strength and high rigidity.

  Further, since the bolts T2, T3, T5, and T6 are fastened to the protector member 31 from the rear side of the engine, the workability of assembly is good without being blocked by a large member.

  The bolt T4 shown in FIGS. 1 and 2 fixes a pipe member (not indicated) to a fastening portion 32c (see FIG. 3) provided in the middle portion of the lower frame portion 31h in the protector member 31. The bolt T4 is also fastened from the engine rear side.

  Next, the arrangement structure of the fuel delivery pipe 47 will be described.

  As shown in FIG. 1, the fuel delivery pipe 47 is located behind the protector portion 31 a and forward of the vehicle front side portion 3 c of the cylinder head 3, that is, between the protector portion 31 a and the cylinder head 3. It is arranged so as to go in the engine longitudinal direction.

  From the fuel delivery pipe 47, a connecting portion 47a connected to an injector (not shown) for directly injecting fuel into each cylinder is provided so as to face the cylinder head 3, and protrudes from the lateral portion to extend in the longitudinal direction of the engine. A perforated mounting portion 47b is provided, and the perforated mounting portion 47b is brought into contact with the cylinder head 3 and fastened by a bolt T10. That is, in this embodiment, since it is a 4-cylinder engine, the fuel delivery pipe 47 is fastened to the cylinder head 3 at four locations. In FIG. 1, the connecting portion 47a, the perforated mounting portion 47b, and the bolt T10 are shown only on the most front side of the engine, and the other three portions are omitted.

  The fuel delivery pipe 47 is connected to the fuel supply pipe 41 that supplies fuel pumped from the fuel pump P fixed to the fastening surface portion 3 b of the cylinder head 3 through the connection portion 45.

  The connecting portion 45 has a structure in which a seal member (not shown) is interposed between the flange 43 on the fuel supply pipe 41 side and the flange 49 on the fuel delivery pipe 47 side, and is connected by a fastening member T9. (See FIG. 2).

  As shown in FIG. 2, the fuel supply pipe 41 extends from the rear side of the vehicle toward the connection portion 45, and includes a side frame portion 31 g in the support frame body portion 31 e in FIG. 3 and a fastening surface portion 3 b of the cylinder head 3. The vehicle is disposed in the vehicle front-rear direction using a gap between the vehicle and the vehicle.

  Therefore, as shown in FIG. 2, the connecting portion 45 includes a front side frame portion 31 i that is a support frame body portion 31 e of the protector member 31, an upper frame portion 31 f, a side frame portion 31 g, and a lower frame portion 31 h. Occurrence of damage due to the retraction of the structural member enclosed and disposed in front of the vehicle is suppressed.

  Further, the engine rear side portion of the fuel delivery pipe 47 close to the connecting portion 45 has a structure provided on the vehicle rear side with respect to the protector member 31.

  An engine rear side portion of the fuel delivery pipe 47 close to the connection portion 45 is shown in FIG. 5 which is a cross section taken along the line AA of FIG. According to the figure, the engine rear side portion of the fuel delivery pipe 47 is covered with a branch pipe 23d of the intake manifold 21 and a protector portion 31a formed in a substantially arc-shaped cross section of the protector member 31. And the throttle body 29 is arrange | positioned at the vehicle front side of the protector part 31a. Therefore, due to a vehicle front collision, a structural member disposed in front of the vehicle with respect to the throttle body 29 collides with the throttle body 29, and even if the throttle body 29 moves backward to the engine side, the protector portion 31a remains in the fuel delivery pipe. 47 can be protected. In such a case, as described above, the protector portion 31a is supported and fastened to the support portion 51 provided in the branch pipe 23d and the middle portion of the stay 53, so that the fuel delivery pipe 47 is protected. It can be done.

  The structure of the intake manifold 21, the protector member 31, and the fuel delivery pipe 47 has been described above. According to this, the connecting portion 45 between the fuel delivery pipe 47 and the fuel supply pipe 41 is a support frame body of the protector member 31. The vehicle front-rear direction is surrounded by the portion 31e, so that damage to the periphery of the connecting portion 45 can be prevented even when the structural member disposed in front of the vehicle is retracted due to a vehicle front collision.

Further, a portion of the fuel delivery pipe 47 on the rear side of the engine near the connection portion 45 has a structure in which the protector portion 31a of the protector member 31 is disposed on the front side of the vehicle. The protector portion 31 a is supported and fastened to a support portion 51 provided on the branch pipe 23 d of the intake manifold 21 and a middle portion of the stay 53. Therefore, even if the throttle body 29 disposed in front of the protector portion 31a is retracted due to a vehicle front collision, the protector portion 31 is protected by the protector portion 31a.

  A stay 53 is extended and fixed from the vicinity of the connection portion of the intake manifold 21 to the throttle body 29 toward the vehicle front side surface portion 5 b of the cylinder block 5, and further, the stay 53 has a lower portion of the protector member 31 below the protector portion. While the support portion 31d is connected, the protector portion upper support portion 31c of the protector member 31 is connected to the branch pipe 23d on the engine rear end side of the intake manifold 21, so that the throttle body 29 having a relatively heavy weight is connected. Even if the intake manifold 21 is connected to the rear side of the engine, the support strength against the engine vibration is high. Further, due to these connection relations, the rigidity of the support of the protector member 31 when the throttle body 29 is retracted due to a forward collision or the like. Can also be increased.

Vehicle front view of engine according to the present invention Side view from the rear side of the engine The perspective view of the protector member concerning this invention The figure which shows the detail of a protector member AA sectional view in FIG. Diagram showing conventional technology

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Engine 3 ... Cylinder head 3b ... Cylinder head rear fastening surface part 5 ... Cylinder block 21 ... Intake manifold 23a, 23b, 23c, 23d ... Branch pipe 25 ... Surge tank 29 ... Throttle body 31 ... Protector member 31a ... Protector part (delivery pipe protector part)
31b ... Reinforcement rib 41 ... Fuel supply pipe 45 ... Connection part 47 ... Fuel delivery pipe 51 ... Support part 53 ... Stay T1 ... Fastening members T2, T3, T5, T6 ... Bolts (fastening members)
T7 ... Bolt (fastening member)

Claims (5)

An in-line multi-cylinder engine in which cylinders are arranged in the vehicle width direction, one in the vehicle width direction is the engine front side, and the other is the engine rear side is mounted on the vehicle,
An intake manifold comprising a plurality of branch pipes, one end of which is connected to the vehicle front side surface of the cylinder head and the other end extends forward of the vehicle, and is then bent downward and connected to the surge tank portion;
A fuel delivery pipe extending in the front-rear direction of the engine below a connecting portion between the cylinder head and the intake manifold;
A throttle body connected to the engine rear side of the surge tank portion and disposed in front of the fuel delivery pipe in the vehicle;
A fuel supply pipe connected to an engine rear side of the fuel delivery pipe;
A metal protector member that protects the periphery of the connecting portion between the fuel delivery pipe and the fuel supply pipe;
The protector member is disposed on the vehicle front side with respect to the connecting portion between the fuel delivery pipe and the fuel supply pipe, and is fastened by a fastening member on the engine rear side of the cylinder head,
The protector member is disposed at least between the throttle body and the fuel delivery pipe in the longitudinal direction of the vehicle, and includes a branch pipe portion on the engine rear end side of the intake manifold, the surge tank portion, and the throttle A protection structure for a vehicle engine, wherein a delivery pipe protector portion fastened by a fastening member is formed integrally with a vicinity of a connecting portion of a body.   2. The protection structure for a vehicle engine according to claim 1, wherein the delivery pipe protector portion is formed in a plate shape having a substantially arc-shaped cross section and has a reinforcing rib.   In Claim 1 or Claim 2, the stay fastened to a cylinder block is provided near the connection part of the intake manifold and the throttle body, and the delivery pipe protector part is fastened to the middle part of the stay. A protective structure for a vehicle engine.   4. The delivery pipe protector portion according to claim 1, wherein the delivery pipe protector portion is supported by fastening a fastening member from the rear side of the engine toward the front side of the engine with respect to the intake manifold. A vehicle engine protection structure.   5. The protection structure for a vehicle engine according to claim 1, wherein the intake manifold is made of a light alloy.

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