JPH07164894A - Engine support structure - Google Patents

Abstract

PURPOSE:To increase the absorbed amount of impart energy by forming a bent part on the forward end of an engine mount member of an automobile, whereby of excessive impact force is applied to the front of a car body, when an engine mounting bracket goes over the bent part, it is detached from the member to release the support state. CONSTITUTION:When excessive impact force is applied to the front of an automobile, a front bumper pushes a radiator 13 and an exhaust pipe part 9 so that front of the car body is depressed and deformed. With the deformation, the engine 4 is pushed backward, and engine mounting brackets 20a, 20b go over the forward end parts 16a, 16b of engine mount members 10a, 10b where bent parts 14a, 14b are deformed in the middle areas with the engine 4 to be detached from the members, so that the support state for the engine 4 is released to drop the engine downward. The engine is removed between a radiator 13 and a brake booster 12, and the front of the car body is deformed by the engine 4 without inhibiting crushing so as to effectively absorb a shock.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine support structure arranged in an engine room of an automobile.

[0002]

2. Description of the Related Art Conventionally, an engine of an automobile is firmly fixed and supported by various means in an engine room provided at a front portion of a vehicle body, and occupies most of a space in the engine room.

[0003]

However, in any of the conventional engine support structures, in any case, the engine is simply structured with respect to the vehicle body while the vibration transmitted from the engine to the vehicle body is minimized. Since it is fixedly supported by, there is a possibility that the following problems may occur.

That is, when an excessive impact force toward the rear of the vehicle body is applied to the front portion of the vehicle body of the automobile, not only the front portion of the vehicle body forming the engine room is deformed but also the cowl and front pillar of the rear portion of the vehicle body are damaged. The vehicle body portion may be deformed, and the vehicle components such as the steering device may move to the rear of the vehicle body. Particularly, in the case of a vehicle of a type in which the engine is mounted on the front part, the cowl is largely deformed by being pushed to the rear of the vehicle body when the engine with extremely high rigidity is pushed by impact force and hits the brake booster. Alternatively, there is a possibility that the steering device attached to the cowl may be largely moved rearward of the vehicle body when the engine directly presses the cowl.

Further, since the intake manifold of the engine, the exhaust pipe, etc. are bulky and take a considerable space in the engine room, there is little crushing margin when the engine room is crushed in the front-rear direction of the vehicle body. The reality is that the amount of force (impact energy) absorbed is small.

Further, when the cowl retracts due to the impact force applied to the front portion of the vehicle body, the front pillar may be broken, which may cause the windshield to peel off.

The present invention has been made in order to solve the above-mentioned various problems, and its purpose is to apply an excessive impact force toward the rear of the vehicle body to the front portion of the vehicle body,
When the engine sinks downward, it can avoid hitting the brake booster, cowl, etc., and can increase the crushing allowance in the engine room to increase the amount of impact energy absorption. An object of the present invention is to provide an engine support structure having a structure capable of preventing the pillar from being broken.

[0008]

In order to achieve the above object, according to the present invention, the tip end side portion of an engine mount member arranged in the engine room so as to extend longitudinally along the longitudinal direction of the vehicle body. While forming a bent portion that is bent in the vehicle width direction, an engine mounting bracket is fixed to a side portion of the engine, and the engine mounting bracket can be moved along the vehicle front-rear direction at a tip end portion of the engine mount member. The engine mounting member is supported by being attached in this state, and the engine mounting bracket is moved in the longitudinal direction of the vehicle body by an excessive impact force so that the engine mounting bracket crosses the bent portion of the engine mounting member. Accordingly, the engine mounting bracket is attached to the engine mount member. Are constructed as supporting state of the engine is canceled out al.

Further, in the present invention, a vibration damping elastic member is attached to one or both of the tip end portion of the engine mount member and the engine mounting bracket, and the elastic member is provided between the engine mount member and the engine mounting bracket. I am trying to intervene.

Further, according to the present invention, the tip end portion of the engine mount member is fixed to the vehicle body through the reinforcing stay.

Further, according to the present invention, a bellows portion which can be contracted in the longitudinal direction of the vehicle body is provided on a portion of the engine mount member excluding the tip portion and the bent portion.

[0012]

When an excessive impact force is applied to the front portion of the vehicle body and the front portion of the vehicle body is deformed and the engine is moved rearward by a predetermined amount, the supporting state of the engine by the engine mount member is released. Therefore, the engine is placed at a position where it drops downward and sinks. Therefore, the engine does not collide with the brake booster, the steering device, the cowl, etc., and the crushing margin in the engine room increases, and the amount of impact energy absorbed increases. As a result, it is possible to reduce damage to the vehicle body portion on the rear side of the vehicle body front portion.

Further, by providing the engine mount member with the bellows portion as described above, the bellows portion contracts after the support of the engine is released, and the impact energy is more effectively absorbed.

Further, since the engine does not hit the cowl as described above, the front pillar is prevented from being broken and the windshield being peeled off due to the backward movement of the cowl.

Further, the presence of the elastic member interposed between the engine mount member and the engine mounting bracket prevents the vibration of the engine from being directly transmitted to the vehicle body.

Further, by fixing the tip end portion of the engine mount member to the vehicle body through the reinforcing stay, the engine can be supported with high strength.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a front engine / front drive type automobile 1 having an engine support structure according to the present invention. In FIG. 1, 2 is a front portion of the automobile 1 and 3 is a front portion of the automobile body. An engine room formed in the portion 2, 4 is an engine housed in the engine room 3, 5 is a front window, 6a and 6b are front pillars, and 7 is a cowl.

The engine 4 described above, as shown in FIG.
The intake manifold portion 8 is provided at the rear portion and the exhaust pipe portion 9 is provided at the front portion. As shown in FIGS. 2, 3 and 4, the pair of left and right engine mount members 10a and 10b are provided inside the engine room 3. Is supported at a predetermined position. A transmission 11 is connected to a side portion of the engine 4, a brake booster 12 is provided at a rear portion of the intake manifold portion 8, and a radiator 13 is provided at a front portion of the exhaust pipe portion 9.
Is provided.

The support structure of the engine 4 will be described in detail below.

First, the engine mount member 10
As shown in FIGS. 2 and 3, a and 10b are made of longitudinally extending pipe material, and bent portions 14a and 14b are formed at predetermined intermediate portions thereof. That is, in this example, bent portions 14a and 14b bent substantially at right angles to the base portions 15a and 15b of the engine mount members 10a and 10b are provided at predetermined intermediate positions of the engine mount members 10a and 10b, Tip portions 16a, 16b of the engine mount members 10a, 10b are bent substantially at right angles to the bent portions 14a, 14b toward the side opposite to the base portions 15a, 15b.

The engine mount member 10 described above is also used.
a and 10b have tip portions 16a and 16b and a bent portion 14
Bellows (folded beads) that can be contracted in the front-rear direction of the vehicle body in a part of the base portions 15a, 15b on the rear side of a, 14b.
17a and 17b are provided, respectively.

Thus, the rear ends of the base portions 15a, 15b of the engine mount members 10a, 10b are attached to the engine mount member mounting brackets 18a, 18b.
Are fixed to the rear surface 3a of the engine room 3 via the. In addition, the engine mount members 10a, 10
The front ends 16a and 16b of the b are reinforced stays 19a and 19b.
It is fixed to the side surfaces 3b and 3c of the engine room 3 via b. As a result, the engine mount members 10a and 10b are arranged on both the left and right sides inside the engine room 3 so as to extend longitudinally along the longitudinal direction of the vehicle body, and are mounted symmetrically in a mutually parallel state. . The tip portions 16a and 16b of the engine mount members 10a and 10b are attached to the base portions 15a and 15b, respectively.
They are arranged on the side closer to the center of the vehicle than b, that is, on the side of the engine 4.

A pair of engine mounting brackets 20a, 20b fixed to both sides of the engine 4 by bolts or the like are attached to the tip ends 16a, 16b of the engine mount members 10a, 10b, respectively. . As clearly shown in FIG. 5, the pair of engine mounting brackets 20 a and 20 b respectively include a mounting piece portion 21 and a fastening portion 22 having a C-shaped cross section and continuously provided at the tip of the mounting piece portion 21. An elastic member (engine mount rubber) 23 having a C-shaped cross section is attached to the inner peripheral surface of the engaging portion 22.

The above engine mount members 10a, 1
The front end portions 16a and 16b of the engine 0b are fixedly inserted into the elastic members 23 of the engine mounting brackets 20a and 20b fixed to the engine 4, so that the engine 4 is attached to the engine mounting bracket 20a. , 20b, and are supported by a pair of engine mount members 10a, 10b.

In this case, the vertical movement of the engine 4 is prevented by the engaging action of the brackets 18a, 18b and the engine mount members 10a, 10b. 1
In the axial direction of the front end portions 16a, 16b of 0b, that is, in the vehicle longitudinal direction, the engine mounting bracket 20a,
20b is slidably movable with respect to the tip portions 16a and 16b (provided that an excessive impact force is applied thereto). Further, the above-mentioned reinforcing stays 19a and 19b are respectively arranged through the notches 24a and 24b of the engaging portion 22 which is open to the side and extends in the front-rear direction. Therefore, these reinforcing stays 19a and 19b are arranged. On the other hand, the engine mounting brackets 20a and 20b are configured to be movable in the front-rear direction of the vehicle body.

In this way, the engine 4 is supported by the pair of engine mount members 10a and 10b at a substantially central portion in the engine room 3. In FIG. 4, 30 is a steering device, 31 is a front hood, 32 is a front bumper, 33 is a front wheel, and 3 is a front wheel.
4 is a wall surface.

Next, the operation when an excessive impact force (load) is applied to the front part of the automobile 1 having the engine supporting structure of the present embodiment as described above will be described with reference to FIG. Is.

When an excessive impact force toward the rear of the vehicle body acts on the front portion of the automobile 1, the front bumper 32 pushes the radiator 13, and then the radiator 13 pushes the exhaust pipe portion 9 of the engine 4 to remove the front hood 31 and the like. The front part 2 of the vehicle body including the vehicle body is crushed and deformed in the front-back direction of the vehicle body. As a result, the engine 4 is pushed rearward, and the pushing force at this time causes the engine mounting brackets 20a, 20b to slide rearward along with the engine 4 along the tip ends 16a, 16b of the engine mount members 10a, 10b. Be moved.

The engine mounting brackets 20a, 20b are attached to the engine mount members 10a, 1
When the engine mount members 10a and 10b are released from the tip end portions 16a and 16b of the engine 0b, the support state of the engine 4 by the engine mount members 10a and 10b is released.
It will be dropped downward as shown in. for that reason,
The engine 4 is excluded from the area between the radiator 13 and the brake booster 12.

As a result, the front part 2 of the vehicle body can be deformed by the high-rigidity engine 4 without hindering crushing. At this time, the engine mount member 10
Since the bellows portions 17a and 17b of a and 10b contract and deform in the front-rear direction of the vehicle body, the deformation of the front portion of the vehicle body is not hindered. As a result, the impact energy is effectively absorbed by the sufficient deformation of the front portion of the vehicle body.

According to the engine support structure of this embodiment having such a structure, when an excessive impact force is applied to the front portion of the vehicle body, the engine 4 is moved rearward of the vehicle body and disengaged from the engine mount members 10a and 10b. , It will be in a state of sinking downward. As a result, the engine 4 becomes the brake booster 1
2 and the cowl 7 are not hit, and the bellows portions 17a and 17b of the engine mount members 10a and 10b are appropriately contracted in the front-rear direction of the vehicle body. Therefore,
The crushing margin in the front part 2 of the vehicle body forming the engine room 3 increases, and thus the amount of impact energy absorbed can be increased sufficiently.

Further, it is possible to avoid a situation in which the engine 4 collides with the steering device 30 and the steering device 30 is moved backward due to the depression of the engine 4. Moreover, since the cowl is also prevented from retracting, the front pillars 6a and 6b can be prevented from being broken,
As a result, it is possible to prevent the peeling of the shield of the front window 5.

Further, a pair of engine mount members 10
Since the brackets 18a, 18b and the reinforcing stays 19a, 19b of the a and 10b are supported at two front and rear ends thereof, the engine mount members 10a and 10b are not supported.
The engine 4 is supported by b with sufficient strength.

Further, the engine mount members 10a, 1
0b and engine mounting brackets 20a, 20
Since the elastic member 23 is interposed between the engine mount members 10a and 10b, the vibration of the engine 4 is generated.
It is possible to effectively suppress the transmission to the vehicle body via the.

The embodiment of the present invention has been described above.
The present invention is not limited to this embodiment, and various modifications and changes can be made based on the technical idea of the present invention. For example, in the above-described embodiment, the present invention is applied to the case of the front engine / front drive type automobile 1 (FF vehicle), but the front engine / rear drive type automobile (FR vehicle) as shown in FIG. The present invention can be applied to 1 '.

Further, in the above-mentioned embodiment, the elastic member 23 for damping is attached to the engine mounting brackets 20a, 20b, but the elastic member 23 is attached to the tip end portions 16a, 1 of the engine mount members 10a, 10b.
It may be attached to 6b. Further, the elastic member 23 for damping may be attached to both of these members.

[0038]

As described above, according to the present invention, the engine is detached from the engine mount member supporting the engine when the engine is moved to the front and rear of the vehicle body by an excessive impact force. If an excessive impact force is applied to the front part of the vehicle body, the supporting condition of the engine will be released and the engine will sink downward, and the engine will not hit the brake booster, cowl, steering device, etc. . Therefore, according to the vehicle provided with the engine support structure according to the present invention, it is possible to sufficiently increase the crushing margin of the vehicle body portion that constitutes the engine room, and to increase the amount of impact energy applied to the vehicle body. it can. Moreover, since the engine is prevented from hitting the steering device, the backward movement of the steering device can be suppressed. Further, since the cowl is also prevented from retracting, the windshield can be prevented from peeling off due to the retracting of the cowl.

Further, by providing the engine mount member with the bellows portion, the engine mount member is appropriately contracted after the support of the engine is released, and the impact energy is effectively absorbed. It is possible to avoid the problem of being moved backwards toward the room side.

Further, by mounting the tip end of the engine mount member attached to the engine mounting bracket to the vehicle body via the reinforcing stay, it is possible to sufficiently secure the support strength of the engine mount member and thus the engine.

Further, by interposing an elastic member for damping between the tip of the engine mount member and the engine mounting bracket, the vibration of the engine is suppressed from being transmitted to the vehicle body through the engine mount member. can do.

[Brief description of drawings]

FIG. 1 is a perspective view of a front engine / front drive type automobile including an engine support structure according to the present invention.

FIG. 2 is a perspective view showing an engine support structure in the engine room of the automobile.

FIG. 3 is a plan view showing the engine support structure.

FIG. 4 is a schematic side view showing the engine support structure.

FIG. 5 is an exploded perspective view showing an engine mounting bracket and a tip portion of an engine mount member.

FIG. 6 is a schematic side view showing a collapsed state of the front portion of the vehicle body when an excessive impact force is applied to the front portion of the vehicle body.

FIG. 7 is a perspective view showing another example of the present invention and showing an engine support structure in an engine room of a front engine / rear drive type automobile.

[Explanation of symbols]

1, 1'Car 2 Front part of vehicle 3 Engine room 4 Engine 10a, 10b Engine mount member 14a, 14b Bent part 15a, 15b Base end part 16a, 16b Tip part 17a, 17b Bellows part 18a, 18b Bracket for mounting engine mount member 19a, 19b Reinforcing stays 20a, 20b Engine mounting bracket 23 Elastic member for vibration control (engine mount rubber) 24a, 24b Notch

Claims (4)

[Claims] 1. A bent portion bent in the vehicle width direction is formed at a tip end side portion of an engine mount member arranged in an engine room so as to extend in a longitudinal direction along a vehicle body front-rear direction. An engine mounting bracket is fixed to a side portion of the engine mount member, and the engine mounting bracket is attached to a tip end portion of the engine mount member in a state of being movable along a vehicle body front-rear direction. As the engine is supported, the engine is moved in the front-rear direction of the vehicle body by an excessive impact force, and the engine mounting bracket crosses the bent portion of the engine mount member,
An engine support structure, wherein the engine mounting bracket is disengaged from the engine mount member to release the support state of the engine. 2. A vibration-damping elastic member is attached to one or both of a tip portion of the engine mount member and the engine mounting bracket, and the elastic member is interposed between the engine mount member and the engine mounting bracket. The engine support structure according to claim 1, wherein: 3. The engine support structure according to claim 1, wherein a tip end portion of the engine mount member is fixed to a vehicle body through a reinforcing stay. 4. The bellows part which can be contracted in the longitudinal direction of the vehicle body is provided in a portion of the engine mount member excluding the front end portion and the bent portion, according to any one of claims 1 to 3. The engine support structure described.