JPH01215624A - Front part constitution of automobile - Google Patents

Abstract

PURPOSE:To efficiently suppress the collision load and restrain the deformation of relating parts by mounting a means for deforming upwards a supporting member which is placed in the longitudinal direction of a vehicle and holds an engine with a mount, when the collision load is received. CONSTITUTION:A supporting member 11 placed in the longitudinal direction of a vehicle has both the front and rear parts 1a and 1b thereof stuck to a vehicle body, and an engine 8 is held on a plurality of mounts 6 set on both the front and the rear position of the part 1. The supporting member 1 is offset up and down between the front and the rear part 1a and 1b thereof and curved down at the middle part 1c. In this case said member 1 has a fragile part 20 at the corner part of the supporting member 11 between the front part 1a and the middle part 1c. The axis L of the front mount 6 mounted on the supporting member 1 is inclined by the specified angle theta toward the front of the vehicle to the straight line L0 perpendicular to the axis of the front part 1a of the supporting member 1. A deforming means is constituted in such a way.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a front body structure of an automobile.

(Prior Art) Generally, an engine placed in an engine room at the front of a car is supported by an engine support member placed in the engine room in the longitudinal direction of the car.
For example, see Utility Model Application Publication No. 60-287).

Incidentally, the engine support member is generally formed into a substantially straight plate shape and is disposed astride between the front frame at the front of the engine room and the dash panel section at the rear. Therefore, in the official version, the engine support member 52 deforms downward into a substantially dogleg shape due to the deformation of the engine mount that supports the engine 50 and the bushings provided thereon, as shown in FIG. Although this deformation of the engine support member is necessary for absorbing the collision energy μ,
When this downward deformation of the engine support member becomes large and the bent portion 52a comes into contact with the road surface 53, it can no longer deform downward, so the head-on collision load is pushed in the direction of pushing the engine support member 52 rearward. As a result, the engine support member 52 is attached to the darts lower panel 54.
There is a concern that it may collide with and deform it.

(Object of the Invention) The present invention attempts to solve the problems pointed out in the above-mentioned section of the prior art. An automobile front body structure that is designed to actively bend upward to increase the effect of absorbing collision energy and to prevent as much as possible deformation of the dash panel due to collisions with engine support members. This was done with the purpose of proposing the following.

(Means for achieving the object) The present invention employs the following configuration as a means for achieving the object.

(1) In the invention described in claim 1, an engine support member that supports the engine via an engine mount is arranged in the engine room configured at the front of the vehicle body, facing in the longitudinal direction of the vehicle body. In the automobile, the engine support member is provided with deformation means for deforming the engine support member upward when a frontal collision load is input.

(2. In the invention set forth in claim 2, an automobile is constructed in which an engine support member for supporting an engine via an engine mount is disposed in an engine compartment configured at the front of the vehicle body, facing in the longitudinal direction of the vehicle body. In this case, the direction of the mounting axis of the engine mount relative to the engine support member is set to coincide with a straight line perpendicular to the axis of the engine support member, or to be inclined toward the front of the vehicle body.

(3) In the invention described in claim 3, an engine support member for supporting the engine via an engine mount is disposed in the engine room configured at the front of the vehicle body, facing in the longitudinal direction of the vehicle body. In an automobile, the engine support member is formed with a fragile portion that induces upward deformation when a frontal collision load is input.

(4) In the invention described in claim 4, an engine support member for supporting the engine via an engine mount is disposed in the engine room configured in the front part of the vehicle body, and faces in the longitudinal direction of the vehicle body. In an automobile in which the engine supporting member is supported on the vehicle body side at both the front and rear sides, a deformed portion that curves upward is formed in the engine support member, and the deformed portion is formed above the front and rear support points on the vehicle body side. It is located in

(Function) With this configuration, the first claim
In the invention described in section 4, when a head-on collision load is input to the engine support member, the engine support member is induced to deform upward by the deformation means, as shown by the chain line in FIG.
'), it is deformed into a substantially Z-shape, and its downward protrusion is minimized as much as possible.

Further, in the invention described in claim 2, when a head-on collision load is input to the engine support member, the head-on collision load causes an inclination angle of the mounting axis with respect to the vertical line at the engine mount attachment portion of the engine support member. An upward force corresponding to the above is generated, inducing upward deformation of the engine support member and minimizing its downward protrusion.

Furthermore, in the invention described in claim 3, when a frontal collision load is input to the engine support member, the engine support member is induced to deform upward at its weak portion, and the engine support member is induced to deform downward. is minimized as much as possible.

Furthermore, in the invention described in claim 4,
When a head-on collision load is input to the engine support member, the deformation portion is induced to deform in an upward direction, and the downward protrusion of the engine support member is minimized.

(Effects of the Invention) Therefore, in each of these inventions, the engine support member actively deforms due to the human force of the frontal collision load, so the impact energy absorption effect is high and safety is improved accordingly, and the engine support member Since upward deformation is induced and the downward protrusion of the engine support member due to deformation is suppressed, there is no collision between the engine support member and the road surface, and deformation of the dash panel due to the engine support member is prevented. It is possible to obtain effects such as prevention of

(Example) Each of the above inventions will be described below based on the examples shown in FIGS. 1 to 3.

First, with reference to FIGS. 1 and 2, a front body structure of an automobile to which the invention described in claims 1 to 3 is applied will be described.

Fig. 1 shows the member structure of the front part (left side part) of the vehicle body, and in the same figure, the reference numeral l represents the engine support member which is the main component of the structure of each invention, and the cross section arranged in the width direction of the vehicle. It is arranged to intersect with member 2 and face toward the rear of the vehicle body. The engine support member 1 is bolted to the vehicle body at two locations, a front portion 1a and a rear portion 1b (see FIG. 3). A first engine mount 6 and a second engine mount 7 are provided on both front and rear sides of the engine support member l, respectively, and the engine 8 is connected to the engine support member via the first engine mount 6 and the second engine mount 7. 1 is supported.

Further, a lower arm 4 is attached to both ends of the cross member 2, and a wheel 5 is attached to the tip side of the lower arm 4.
is installed.

Hereinafter, with reference to FIG. 2, the structure and function of the front portion of this engine support member 1 will be explained.

As shown in FIG. 2, the engine support member 1 is vertically offset between a front portion 1a and a rear portion 1b, and both the front portion 1a and the rear portion 1b are shaped like straight rods extending in a substantially horizontal direction. , and the intermediate portion 1c located between the two is shaped like a curved rod that curves downwardly to bulge out. The corner portion between the front part 1a and the middle part 1c is
By applying the invention set forth in claim 3, the engine support member 1 is slightly notched from its lower surface side to reduce the cross-sectional height, and this is made into a weakened portion 2θ.

Further, the front part 1a of this engine support member 1 is provided with the first
Mount bracket 11 that supports engine mount 6
However, in this embodiment, the invention recited in claim 2 is applied to this portion, and the attachment axis of the first engine mount 6 to the engine support member l is set to the front portion. The vehicle body is inclined at an angle θ toward the front of the vehicle body with respect to a straight line Lo perpendicular to the axis of the vehicle 1a.

With this configuration, when a head-on collision load F is manually applied to the engine support member l from the front end surface 1d side due to a collision of an automobile, the strength of the fragile portion 20 is slightly lower than that of other portions as described above. Therefore, if the engine support member l is subjected to a head-on collision load F from the notch on the lower surface side, upward deformation will be induced, and the head-on collision load F will be applied to the mount bracket 11 portion. This is the first
When supported by the engine mount 6 portion, an upward force Fa is applied to this portion in accordance with the angle θ, and due to the synergistic effect of these forces, the weakened portion 20 portion is actively deformed upward. As a result, collision energy is effectively absorbed and the shock to the driver is alleviated as much as possible. In addition, the engine support member l has a weak portion 20.
The engine support member 1 deforms upward from
Therefore, there is no possibility that the engine support member 1 collides with the road surface, causing the engine support member 1 to leave behind the darts lower panel and deform it. This will be prevented in advance and reliably.

In this embodiment, a weak portion 20 is formed in the engine support member l, and this portion is positively deformed upward in the event of a collision, and the mounting axis of the first engine mount 6 is moved toward the front of the vehicle body. The configuration of tilting each corresponds to the deforming means in the invention recited in claim 1.

Next, the front body structure of an automobile to which the invention described in item 4 is applied will be described with reference to FIG. 3. FIG. 3 shows a side view of the engine support member 30. This engine support member 30 has a front portion 30a that is connected to the front frame 9.
In addition, the rear portions 30b are supported on the darts lower panel 10 side. In addition, this engine support member 3
0, an engine 8 is supported via a first engine mount 6 and a second engine mount 7. In this embodiment, the front end 30d of the inclined intermediate part 30c located between the front part 30a and the rear part 30b which are offset in the vertical direction is connected to the support surface of the front part 30a and the rear part. This portion is located above the support surface σ of 30b and is defined as the deformed portion 21. Therefore, when a head-on collision load is applied to the engine support member 30, this deformable portion 21 will inevitably be deformed in a state where it is pushed upward. Therefore, a collision between the engine support member 30 and the road surface in the event of a collision is prevented, and an excessive bundle checking load is reliably prevented from being input to the darts lower panel 10 side.

[Brief explanation of the drawing]

FIG. 1 is a front plan view of an automobile equipped with a front body structure according to an embodiment of the invention as set forth in claims 1 to 3, and FIG. 2 is an enlarged arrow taken along A perspective view, FIG. 3 is a side view of an engine support member of an automobile equipped with a front body structure according to an embodiment of the invention as set forth in claim 4, and FIG. 4 is a side view of the engine support member during a collision. It is a deformation state diagram. 1.31 Engine support member 2 Cross member 4 Lower arm 5 Wheel 6.7 Engine mount 8 Engine lO ... Datsushi lower panel II ... Mount bracket 20 ... Weak part 21 ... Deformed part

Claims (1)

[Scope of Claims] 1. In an automobile in which an engine support member for supporting an engine via an engine mount is disposed in an engine compartment configured in the front part of the vehicle body, the engine support member faces in the longitudinal direction of the vehicle body. A front body structure for an automobile, characterized in that a deforming means is provided for deforming the body upwardly when a frontal collision load is input. 2. In an automobile in which an engine support member that supports the engine via an engine mount is arranged in the engine room configured in the front part of the vehicle body, facing in the longitudinal direction of the vehicle body,
The front of the automobile, characterized in that the direction of the mounting axis of the engine mount relative to the engine support member is set to coincide with a straight line orthogonal to the axis of the engine support member, or to be inclined toward the front of the vehicle body. Part car body structure. 3. In a vehicle in which an engine support member that supports the engine via an engine mount is arranged in the engine room configured at the front of the vehicle body and faces in the longitudinal direction of the vehicle body, the engine support member is subjected to a head-on collision load. A front body structure for an automobile, characterized in that a fragile portion is formed that induces upward deformation upon input. 4. An engine support member that supports the engine via an engine mount is arranged in the engine room configured at the front of the vehicle body, facing in the longitudinal direction of the vehicle body, and is supported on the vehicle body side at both the front and rear sides. In automobiles,
A front part of an automobile characterized in that the engine support member is formed with a deformed part that curves upward, and the deformed part is located above the front and rear support points on the vehicle body side. Vehicle structure.