JP6780433B2 - Vehicle engine mounting structure - Google Patents

Description

The present invention relates to an engine mounting structure for mounting an engine in a four-wheeled vehicle such as an automobile.

In this type of vehicle, an engine is provided in front of the engine compartment and a dash panel is provided behind the engine compartment. At the time of a frontal collision of the vehicle, the vehicle collides with an object, the vehicle body moves forward and collapses, and the engine moves rearward with a dash panel. Of the frontal collisions, the offset frontal collision is a collision form that is most likely to occur on a daily basis, and the absolute value of the impact load is not large, but the amount of deformation of the vehicle body is extremely large. Since the rear side of the dash panel is the passenger compartment, how to mount the engine in the engine compartment in relation to peripheral parts is extremely important for improving safety.

For example, in the impact force mitigating device for a vehicle disclosed in Patent Document 1, one side is attached to a dash panel and the other side is at least in the vehicle width direction and the upward direction on the front portion of a tubular master cylinder protruding toward the front of the vehicle. A master cylinder side projecting member that projects in one direction is provided. On the other hand, an engine-side projecting member is provided at the rear of the engine mounted on the front of the vehicle of the master cylinder so as to project to the rear side of the rear surface of the engine. When the engine moves to the rear side in the event of a vehicle collision, the engine-side projecting member collides with the master cylinder-side projecting member to bend the master cylinder.

Japanese Unexamined Patent Publication No. 2008-265405

However, in the impact force mitigating device for vehicles according to Patent Document 1, the master cylinder side protruding member is separated from the master cylinder due to the load when the engine side protruding member collides, and it becomes difficult to reliably bend the master cylinder. Is possible. Therefore, it is not always easy to prevent the master cylinder from being pushed out toward the passenger compartment.

In view of such circumstances, it is an object of the present invention to provide a vehicle engine mounting structure in which a master cylinder is reliably bent to prevent the master cylinder from being pushed out toward the passenger compartment.

The engine mounting structure of the vehicle of the present invention includes an engine provided in front of the engine room, a dash panel provided in the rear of the engine room, and a vehicle body frame arranged on the side of the engine room and extending in the front-rear direction. A mount bracket for supporting the engine on the vehicle body frame, a master cylinder projecting forward from the dash panel, and a master cylinder located in front of the master cylinder and covering the cam timing chain from the side of the engine. an engine mounting structure of a vehicle equipped with the chain cover, and the the chain cover and the protruding portion formed to protrude in a direction opposite to said master cylinder at the rear of the engine, for mounting the mounting bracket a mounting boss provided, upon front collision, after the engine is in contact with the master cylinder, the guide inclined part to bend down the said master cylinder to the side of the engine room is provided in the protruding portion, the guide ramp The portion is characterized in that it has a surface that faces the master cylinder and is inclined sideways, and is connected to the mount boss portion .

According to the present invention, the guide inclined portion pushes and bends the master cylinder toward the side of the engine room at the time of a collision, and the master cylinder is surely bent, so that the master cylinder can be prevented from being pushed out toward the passenger compartment. ..

It is a side perspective view of the vehicle as an application example of this invention of this invention. It is a top view of the vehicle as an application example of this invention of this invention. It is a top view which shows the example of the structure of the main part concerning the engine mounting structure in the engine room provided in the front part of the vehicle in the Example of this invention. It is a perspective view which shows typically the schematic structure of the engine which concerns on embodiment of this invention. It is a right side perspective view which shows the engine mounting structure in the Example of this invention. It is a right-side exploded perspective view which shows the example of the attachment structure to the engine of the mount bracket which concerns on embodiment of this invention. It is a top view which shows the arrangement relation of the master cylinder and the guide inclined portion which concerns on the engine mounting structure in the Example of this invention. It is a side view which shows the arrangement relation of the master cylinder and the guide inclined portion which concerns on the engine mounting structure in the Example of this invention. It is a top view which shows typically the moving state of the engine at the time of an offset frontal collision in the Example of this invention. It is a top view which shows typically the circumference of the master cylinder and the guide inclined portion at the time of an offset frontal collision in the Example of this invention. It is a top view which shows typically the guide inclined part provided in the mount bracket in the modification of this invention.

Hereinafter, preferred embodiments of the vehicle engine-mounted structure according to the present invention will be described with reference to the drawings.
The vehicle engine mounting structure according to an embodiment of the present invention includes an engine provided in front of the engine room, a dash panel provided in the rear of the engine room, and arranged on the side of the engine room in the front-rear direction. An engine-mounted structure of a vehicle including a vehicle body frame extending along a vehicle body frame, a mount bracket for supporting the engine on the vehicle body frame, and a master cylinder projecting forward from the dash panel. At this time, after the engine comes into contact with the master cylinder, a guide inclined portion that pushes and bends the master cylinder toward the side of the engine room has a surface that faces the master cylinder and is inclined sideways.

In the engine mounting structure of the vehicle according to the present invention, the guide inclined portion having a function of pushing and bending the master cylinder toward the side of the engine room in the event of an offset frontal collision or the like reliably bends the master cylinder, and the master cylinder is in the passenger compartment. Avoid being pushed to the side.

FIG. 1A is a side perspective view of a vehicle as an application example of the present invention, and FIG. 1B is a top view of the vehicle. Further, FIG. 2 is a top view showing an example of a main part configuration related to an engine mounting structure in an engine room provided in the front part of the vehicle. First, the schematic configuration of the vehicle according to this embodiment will be described with reference to these figures. In the drawings used in the following description including FIG. 1A, the direction viewed from the driver's seat is the front of the vehicle, and the opposite direction is the rear. In addition, the right side is the right side and the left side is the left side, and these directions are indicated by arrows as necessary.

The vehicle 10 may be, for example, a vehicle such as a passenger car as shown in FIGS. 1A and 1B, and has an engine room 11 at the front portion of the vehicle 10 as roughly illustrated by a dashed line in these figures, and the engine room 11 The engine 1 is installed inside. The engine 1 is integrally coupled and supported to the vehicle body by being suspended from the vehicle body of the vehicle 10 via a plurality of engine mounts described later.

In the engine room 11, as shown in FIG. 2, as a skeleton structure of the vehicle body of the vehicle 10, a pair of left and right body frames 12, 12'(the left body frame 12'is abbreviated by a two-dot chain line in FIG. 2). Are extended in the front-rear direction with a predetermined distance from each other in the left-right direction. Here, the engine 1 may be, for example, a multi-cylinder, typically a 4-cylinder DOHC gasoline engine or the like in this embodiment. In this case, for example, the No. 1 (# 1, the same applies hereinafter) to # 4 cylinders are arranged in parallel in the left-right direction, and the cylinder axis of each cylinder points in a substantially vertical direction. The transmission 13 is integrally coupled to the left side of the engine 1, supported by the vehicle body frame 12 via the engine mount 14 on the right side of the engine 1, and similarly via the engine mount 14'on the left side of the transmission 13. It is supported by the body frame 12'. The model of the valve gear of the engine, the number of cylinders, etc. can be changed as needed. In addition to these left and right engine mounts 14 and engine mounts 14', the engine 1 is further supported at the rear side via an engine mount (specifically, a torque rod) (not shown).

In the engine 1, the cylinder head 3 and the cylinder head cover 4 are integrally coupled to the upper part of the cylinder block 2 in order as roughly shown in FIG. 3, and are configured as a parallel 4-cylinder engine as described above. A cam timing chain for driving a camshaft (not shown) of a valve operating mechanism is mounted on the right side of the engine body of the engine 1 (the body part of the engine 1 composed of # 1 to # 4 cylinders), and the chain is mounted. The cover 5 covers the cam timing chain from the right side. The chain cover 5 is formed on the right side of the # 1 cylinder of the engine 1 over a region from the cylinder block 2 to the cylinder head 3, and is firmly coupled and fixed to the engine body. The cylinder head cover 4 is coupled to the upper surfaces of the cylinder head 3 and the chain cover 5, respectively.

As shown in FIG. 2, the engine 1 is mounted in front of the engine room 11, and a dash panel 15 that separates the vehicle interior and the engine room 11 is arranged behind the engine room 11. A master cylinder 16 is provided so as to project forward from the dash panel 15 corresponding to the driver's seat side of the vehicle interior, and the master cylinder 16 is fixed to the master back 16A attached to the dash panel 15.

In the specific configuration of the engine mount 14 of this embodiment, the engine mount 14 is supported by the vehicle body frame 12 on the right side of the engine 1 via the mount bracket 17 with reference to FIG. The mount bracket 17 is fixed to the right side of the engine 1 and is composed of an arm-shaped member protruding to the right. Here, FIG. 5 shows an example of a mounting structure of the mount bracket 17 to the engine 1. In FIG. 5, a mount boss portion 6 projecting to the right is formed on the upper portion of the chain cover 5, and a mounting seat surface 6a for the mount bracket 17 is provided on the upper surface thereof. Further, a plurality of screw holes 6b into which the fastening bolts 18 (see FIG. 4) of the mount bracket 17 are screwed are formed in the mount boss portion 6 along the front-rear direction. In the illustrated example, three screw holes 6b and three fastening bolts 18 are provided in accordance therewith, but the number of these bolts can be increased or decreased as appropriate. The base portion 17a of the mount bracket 17 is fastened to the mount boss portion 6 by the fastening bolt 18 in a state where it is applied to the mounting seat surface 6a of the mount boss portion 6, and both are integrated, and the mount bracket 17 is once from the base portion 17a. The tip 17b extends to the right by stepping down.

Further, in the engine mount 14, referring to FIG. 2 or FIG. 4, a mount member 19 formed in a substantially hat shape or a deformed gate shape is erected on the upper surface of the vehicle body frame 12 as shown in FIG. The hat-shaped flange portion 19a (gate-shaped lower outer portion) of the mount member 19 is fastened and fixed by bolts 21 on the bases 20a and 20b projecting from the upper surface of the vehicle body frame 12, respectively. The mount bracket 17 extends to the right from the mount boss portion 6 so as to enter the inside of the hat shape of the mount member 19, and is connected to the mount member 19 via a mount rubber 22 mounted inside the mount member 19. As shown in FIG. 4, the tip portion 17b of the mount bracket 17 is inserted so as to be sandwiched from above and below by the mount rubber 22, and is elastically supported by the mount member 19 via the mount rubber 22.

The engine mount 14'that supports the transmission 13 also has a support structure that elastically supports the transmission 13 to the vehicle body frame 12', as in the case of the engine mount 14.

As described above, the engine 1 is supported by the vehicle body frame 12 and the vehicle body frame 12'via a plurality of engine mounts including the engine mount 14 and the engine mount 14'. In this case, the engine mounting structure according to the present invention is applied. .. Here, the engine mounting structure of the present invention is arranged on the side of the engine 1 provided in front of the engine room 11, the dash panel 15 provided in the rear of the engine room 11, and the engine room 11 along the front-rear direction. a body frame 1 2 extending configured to include a mounting bracket 17 for supporting the engine 1 on the vehicle body frame 1 2. In this case, a master cylinder 16 is further provided so as to project forward from the dash panel 15.

In the engine mounting structure of the present invention, a guide inclined portion that pushes and bends the master cylinder 16 toward the side of the engine room 11 when the engine 1 collides with the master cylinder 16 is provided. As shown in FIG. 2 or FIG. 4, the guide inclined portion 7 is provided, and in this embodiment, the guide inclined portion 7 is provided at a predetermined portion of the engine 1. Here, with reference to FIGS. 1A and 1B, an example is taken in the case of an offset frontal collision (front collision) that typically collides with the object 100 (collision block) on the right side of the vehicle 10. The guide inclined portion 7 has a function of pushing and bending the master cylinder 16 toward the side of the engine room 11 at the time of such an offset frontal collision.

As shown in FIG. 5 in this embodiment, the guide inclined portion 7 is provided on the chain cover 5 located in front of the master cylinder 16. In this case, the chain cover 5 is provided with a protruding portion 8 formed by projecting from the rear portion of the engine 1 in a direction facing the master cylinder 16, and typically, a guide inclined portion 7 is integrally formed on the right side of the protruding portion 8. Will be done. The guide inclined portion 7 has a function of pushing and bending the master cylinder 16 to the side of the engine room 11 (outward to the right in this embodiment) after the engine 1 comes into contact with the master cylinder 16 at the time of a front collision. It is configured to have a surface 7a that faces the cylinder 16 and is inclined sideways. Specifically, as shown in FIG. 6, the trailing edge of the protruding portion 8 is formed in the left-right direction, and when the trailing edge is extended to form the baseline L, the inclined surface 7a of the guide tilted portion 7 is the baseline. It is formed so as to be inclined with respect to L at an inclination angle θ. The magnitude of the inclination angle θ is an acute angle of about several tens of degrees, but it can be set as appropriate. When viewed from the master cylinder 16 side, the guide inclined portion 7 is inclined so that the right side of the guide inclined portion 7 gradually retracts.

In addition to the case where the guide inclined portion 7 is integrally formed with the protruding portion 8, the guide inclined portion 7 may be provided on the chain cover 5 by itself.
Further, the thickness of the guide inclined portion 7 in the vertical direction may be thicker than that in the illustrated example of FIG. 5, that is, it can be formed so as to exhibit a planar shape, whereby the guide inclined portion 7 can be formed to have a planar shape. Contributes to ensuring the rigidity of 7.

Further, the guide inclined portion 7, particularly the front side thereof, is smoothly connected to the mount boss portion 6 as shown in FIGS. 5 and 6.
In this case, a connecting surface 6c continuously connected to the guide inclined portion 7 is formed at the rear portion of the mount boss portion 6, and the guide inclined portion 7 and the mount boss portion 6 are smoothly and continuously connected via the connecting surface 6c. Will be done.

Here, as shown in FIG. 6, the guide inclined portion 7 has a region overlapping with the width W in the left-right direction of the master cylinder 16, that is, the guide inclined portion 7 is at least a part of the master cylinder 16 in the front-rear direction view. It is formed so as to overlap with. In this case, the guide inclined portion 7 is biased to the right (outside of the engine room 11) of the central shaft 16a of the master cylinder 16, and the degree of this deviation is the guide inclined portion 7 with respect to the central shaft 16a of the master cylinder 16. This includes the case where most of the is biased or completely biased.

Further, as shown in FIG. 7, the guide inclined portion 7 is formed so as to overlap the master cylinder 16 in the height direction. That is, the guide inclined portion 7 is arranged so as to be located within the range of the height H of the master cylinder 16. In this case, the height position of the guide inclined portion 7 is preferably set near the central axis 16a of the master cylinder 16.

At the time of the offset frontal collision according to the present embodiment, when the vehicle collides with the object 100 on the right side of the vehicle 10 as shown in FIG. 8, the engine 1 moves from the state shown by the dotted line in FIG. 8 to the state shown by the solid line. That is, due to the collision load, the engine 1 moves rearward while appropriately rotating to the left as shown by arrow A in FIG. 8 with the transmission 13 side as a fulcrum. As the engine 1 moves, the guide inclined portion 7 typically comes into contact with the left front corner portion of the master cylinder 16 in the manner shown in FIG. 9, and the master cylinder 16 is brought into contact with the master cylinder 16 as shown by the arrow B in FIG. Push and bend to the side of the engine room 11. In this way, a guide inclined portion 7 having a function of pushing and bending the master cylinder 16 toward the side of the engine room 11 at the time of an offset frontal collision is provided, the master cylinder 16 is reliably bent, and the master cylinder 16 is on the passenger compartment side due to a collision load. It is possible to avoid being pushed out to. Therefore, it is possible to prevent the master cylinder 16 from entering the vehicle interior side in the event of an offset frontal collision or the like, and to ensure and guarantee high safety for the occupants.

In the above case, since the guide inclined portion 7 is provided on the chain cover 5 that is firmly coupled to the engine body of the engine 1, the load when it comes into contact with the master cylinder 16 is reliably received, and the master cylinder 16 is accurately bent. be able to.

Further, the guide inclined portion 7 is connected to the mount boss portion 6 provided on the chain cover 5. Since the mount boss portion 6 supports the mount bracket 17 to form the engine mount 14, it has extremely high rigidity. By providing the guide inclined portion 7 at the highly rigid portion of the chain cover 5 in this way, the impact load at the time of collision High durability against is ensured.
In this case, the guide inclined portion 7 and the mount boss portion 6 are smoothly and continuously connected via the connecting surface 6c of the mount boss portion 6.
As a result, the guide inclined portion 7 is formed by substantially expanding to the mount boss portion 6 having high rigidity, and the length of the guide inclined portion 7 in the left-right direction (width direction) is substantially increased, resulting in a frontal collision. It is possible to effectively deal with collisions from diagonal directions as well as in the case of.

Further, in the above case, the guide inclined portion 7 is formed so as to overlap with at least a part of the master cylinder 16 in the front-rear direction view. Further, as shown in FIG. 7, the guide inclined portion 7 is formed so as to overlap the master cylinder 16 in the height direction.
By setting the relative positions of the guide inclined portions 7 with respect to the master cylinder 16 to overlap in this way, the guide inclined portions 7 surely come into contact with the master cylinder 16 at the time of an offset frontal collision, and the master cylinder 16 is placed on the side of the engine room 11. Guarantees the ability to push and bend inward.

In particular, the guide inclined portion 7 is arranged so as to be biased to the right from the central axis 16a of the master cylinder 16, and when the engine 1 moves rearward while rotating to the left as shown in FIG. The inclined portion 7 can be reliably brought into contact with the master cylinder 16.

Here, with reference to FIG. 1B, the present invention can also cope with a full-set frontal collision in which the vehicle 10 collides with the object 100'at the center of the front portion.
In the case of this full-set frontal collision, the vehicle moves substantially in parallel backward due to the collision load from the object 100'that collides with the center of the front portion of the vehicle 10. In response to a full set frontal collision, the guide inclined portion 7 completely overlaps with the width W in the left-right direction of the master cylinder 16 or to the left (in the engine room 11) as partially omitted by the dotted line in FIG. It is effective to form it so that it is appropriately biased inward.

During a full-set frontal collision, the engine 1 typically translates backwards without rotation, unlike moving backwards while rotating as shown by arrow A in FIG. 8 during an offset frontal collision. By arranging the guide inclined portion 7 so as to overlap with the master cylinder 16 as described above, the guide inclined portion 7 pushes and bends the master cylinder 16 toward the side of the engine room 11 at the time of a full set frontal collision. Also in this case, the guide inclined portion 7 can surely bend the master cylinder 16 and prevent the master cylinder 16 from being pushed out to the vehicle interior side.

Therefore, by ensuring a large width in the left-right direction of the guide inclined portion 7, the guide inclined portion 7 collides with the master cylinder 16 in both the offset front collision and the full set front collision. Then, the guide inclined portion 7 can be made capable of dealing with both an offset frontal collision and a full set frontal collision. Further, the present invention can be effectively applied not only to a frontal collision but also to a collision from an oblique front.

Next, in the modified example of the present invention, it is possible to provide the guide inclined portion 7 on the mount bracket 17. In this case, as described above, the guide inclined portion 7 is attached to the rear portion of the base portion 17a of the mount bracket 17 fixed to the mounting seat surface 6a of the mount boss portion 6 as roughly shown in FIG. The guide inclined portion 7 can be integrally formed with the protruding portion 8, or the guide inclined portion 7 can be provided on the mount bracket 17 by itself.

The guide inclined portion 7 provided on the base portion 17a of the mount bracket 17 is arranged at the rear portion of the engine 1 so as to face the master cylinder 16, and is set so as to overlap the master cylinder 16 in the horizontal direction and the vertical direction. The mount bracket 17 itself fixed to the mounting seat surface 6a of the mount boss portion 6 has high rigidity. According to the guide inclined portion 7 provided on the mount bracket 17, the load at the time of contact with the master cylinder 16 at the time of an offset frontal collision or the like can be reliably received, and the master cylinder 16 can be accurately bent.

As described above, the guide inclined portion 7 can be provided on either the chain cover 5 or the mount bracket 17. Not only the case where the guide inclined portion 7 is provided independently in each of the chain cover 5 and the mount bracket 17, but also the guide inclined portion 7 can be provided in both the chain cover 5 and the mount bracket 17. By providing the plurality of guide inclined portions 7 in this way, it is possible to increase the probability of contacting the master cylinder 16 at the time of an offset frontal collision or the like.

In a further modification of the present invention, an example in which the guide inclined portion 7 is typically formed in a linear shape has been described, but for example, an appropriate radius of curvature that is convex rearward as shown by a single point chain line in FIG. It is also possible to form an arc shape or a curved shape having R. In this case, the shape of the guide inclined portion 7 may be a relatively large radius of curvature R close to a straight line, and can be applied to any of the above-described embodiments.

Further, if it is the rear part of the engine 1 and is a part facing the master cylinder 16 when viewed in the front-rear direction, the right side part of the engine body, for example, the # 1 cylinder, or when rigidity and space are secured. It is also possible to provide the guide inclined portion 7 on the cylinder head cover 4.

Although the present invention has been described above with various embodiments, the present invention is not limited to these embodiments and can be modified within the scope of the present invention.
In the above embodiment, an example of an offset frontal collision that collides with the object 100 on the right side of the vehicle 10 has been described, but in the case of an offset frontal collision that collides with the object 100 on the left side of the vehicle 10, what is the above embodiment? It is configured in the opposite relationship, and the same effect can be obtained.
Further, the type of the engine 1 arranged in the engine room 11 and the specific configuration of the vehicle body frames 12 and 12'are not limited to those shown in the illustrated examples, and can be appropriately changed as needed. Even in this case, the present invention is effectively applied.

1 engine, 2 cylinder block, 3 cylinder head, 4 cylinder head cover, 5 chain cover, 6 mount boss, 7 guide tilt, 8 protrusion, 10 vehicle, 11 engine room, 12, 12'body frame, 13 transmission, 14, 14'engine mount, 15 dash panel, 16 master cylinder, 16A master back, 17 mount bracket, 18 fastening bolts, 19 mount members, 20a, 20b base, 22 mount rubber.

Claims (3)

The engine installed in front of the engine room and
A dash panel provided behind the engine room and
A body frame arranged on the side of the engine room and extending in the front-rear direction,
A mount bracket for supporting the engine on the vehicle body frame,
A master cylinder that protrudes forward from the dash panel,
A chain cover located in front of the master cylinder and covering the cam timing chain from the side of the engine.
It is an engine-mounted structure of a vehicle equipped with
The chain cover is provided with a projecting portion formed at the rear of the engine so as to project in a direction facing the master cylinder, and a mount boss portion for attaching the mount bracket.
At the time of front collision, after the engine comes into contact with the master cylinder, a guide inclined portion for pushing and bending the master cylinder toward the side of the engine room is provided in the protruding portion .
The engine mounting structure of a vehicle, wherein the guide inclined portion has a surface that faces the master cylinder and is inclined sideways, and is connected to the mount boss portion . Wherein the rear portion of the mounting boss portion, an engine mounting structure for a vehicle according to claim 1, characterized in that connecting surface continuous with the guide inclined part is formed. The vehicle according to claim 1 or 2 , wherein the guide inclined portion is formed so as to overlap with at least a part of the master cylinder in the front-rear direction and overlap with the master cylinder in the height direction. Engine mounting structure.

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