JP2563769Y2 - Lower body structure of car - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lower body structure of an automobile.

[0002]

2. Description of the Related Art An automobile body is disclosed in Japanese Patent Application Laid-Open No. 61-24987.
As disclosed in Japanese Patent Application Publication No. 3 (Kokai) No. 3 (1993), it is customary that the vehicle compartment and the engine room are separated by a dash panel. The engine room is equipped with an engine. The engine room is classified into a vertical engine that is oriented in the front-rear direction and a horizontal engine that is oriented in the vehicle width direction according to the direction of the engine output shaft. You.

[0003] In the case of a horizontal engine, a front exhaust having an exhaust pipe connected to the front side of the engine and a rear exhaust having an exhaust pipe connected to the rear side can be divided. In the latter case, that is, in the case of the rear exhaust, there is an advantage that the exhaust pipe is less bent than in the case of the front exhaust, so that the exhaust efficiency is good.

[0004]

It is desirable that the behavior of the engine at the time of a head-on collision involves downward movement for safety measures. Accordingly, the present invention is to provide a lower body structure of an automobile in which a downward movement of the engine is forcibly performed at the time of a frontal collision, assuming the above-mentioned horizontal engine.

[0005]

Means for Solving the Problems In order to achieve such a technical problem, the present invention employs the following configuration. That is,

The lower part of the dash panel, which separates the engine room from the vehicle compartment, is formed as an inclined portion which is gradually located rearward of the vehicle body as it goes downward, and the output shaft of the engine room is directed in the vehicle width direction. A horizontal engine is disposed, and an exhaust pipe is coupled to a rear side surface of the engine, and the exhaust pipe is
The dash panel is disposed so as to extend rearward of the vehicle body along the inclined portion, and the inclined portion of the dash panel extends in the vehicle longitudinal direction along the inclined portion in a region above the exhaust pipe. And a dash member is joined to the lower body structure of the vehicle. In addition, preferable embodiments of the above configuration are as described in claims 2 to 6.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. Reference numeral 1 shown in FIG. 1 is a dash panel,
The dash panel 1 separates an engine room 2 located in front of the dash panel 1 and a vehicle compartment 3 located behind. The dash panel 1 has an inclined portion 1 a that is gradually positioned rearward as the lower portion faces downward, and a lower end thereof is joined to a front end of the floor panel 4. The floor panel 4 constitutes the floor of the passenger compartment 3 as is known. The floor panel 4 is formed with a tunnel body 5 having a convex shape protruding upward at the center in the vehicle width direction and extending in the front-rear direction.

The dash panel 1 has a tunnel entrance 6 formed at a portion corresponding to the tunnel main body 5. That is, in the inclined portion 1a of the dash panel 1, as shown in FIG. 2, the above-mentioned tunnel portion entrance 6 having a convex shape is formed at the center portion in the vehicle width direction. Is connected to the tunnel section main body 5. The dash panel 1 defining the tunnel entrance 6 is bulged forward at the entrance end of the tunnel entrance 6 as shown in FIG. The longitudinal length of the inlet 6 is extended toward the engine room 2.

At the lower end of the dash panel 1, FIG.
As shown in the figure, a cross member 8 is provided. The cross member 8 extends in the vehicle width direction, and its left and right ends are joined to the side shell 9. As is known, the side shells 9 are located on both sides of the floor panel 4 and extend in the vehicle width direction to form a vehicle body strength member. As shown in FIG. 1, the cross member 8 has a closed cross-sectional structure, and has a concave portion 1 protruding downward at a central portion in the vehicle width direction.
0 is provided. That is, the concave portion 10
The lower part of the tunnel entrance 6 is covered.

In FIG. 1, reference numeral 12 denotes an engine, and the engine 12 is integrated with a transmission 13. The engine 12 is a so-called horizontal engine in which an output shaft 12a is arranged in the engine room 2 with the output shaft 12a directed in the vehicle width direction. An intake pipe 13 is connected to a front side surface 12b of the engine 12, and the other rear side. An exhaust pipe 14 is connected to the side surface 12c. That is, this engine 12
This is what is called rear exhaust.

The exhaust pipe 14 includes an exhaust manifold 16 and a common exhaust pipe 1 arranged in order from the upstream side to the downstream side.
The common exhaust pipe 18 is provided with a catalytic converter 20 for purifying exhaust gas and the like. The common exhaust pipe 18 is arranged in the tunnel section main body 5, and its front end is arranged so as to face the engine room 2 through the tunnel section entrance 6. That is, the common exhaust pipe 18
Of the cross member 8 (the concave portion 10)
The dash panel 1 is disposed so as to pass through a tunnel entrance 6 whose lower area is covered by the dash panel 1 and to be inclined along the inclination of the inclined section 1a. For this reason, the exhaust manifold 16
Has a straight shape extending substantially straight rearward from the engine 12.

The exhaust pipe 14 is fixed to the engine 1 (transmission 13) via a bracket 22 at a connection between the exhaust manifold 16 and the common exhaust pipe 18. Reference numeral 24 shown in FIG. 1 is a bolt for fastening the bracket 22 to the engine 1. Reference numeral 26 denotes a part of a rack and pinion type steering mechanism.

A dash member 30 is provided at the tunnel entrance 6 above the exhaust pipe 14. The dash member 30 is, as shown in FIG.
, And further extends to the front end of the floor panel 4 (the front end of the tunnel body 5), and the dash member 30 forms a closed section (see FIG. 2). Is filled with polyurethane foam 32.

In the above configuration, the exhaust pipe 14 extends substantially linearly from the engine 12 toward the rear of the vehicle body and then enters the main body 5 through the tunnel entrance 6, so that the exhaust pipe 14 is less bent. Therefore, the exhaust efficiency can be improved. In the case of a head-on collision, the exhaust pipe 1
4 can be displaced downward by being guided by the dash member 30, and accordingly, the engine 12 can be displaced downward. Further, since the foamed polyurethane 32 is filled in the closed section formed by the dash member 30, the exhaust pipe 1
The heat emitted from the exhaust pipe 14 is insulated from the heat emitted from the
It can be prevented from being transmitted to the inside.

[0015]

According to the present invention (claim 1), in the event of a head-on collision, the exhaust pipe is formed in the upper region of the exhaust pipe by a dash member extending in the front-rear direction along the inclined portion and having a stronger tension. Is forcibly guided downward, so that downward displacement of the engine can be forced. According to the second aspect, since the dash member forms a closed cross section with the dash panel, it is possible to increase the reliability of the forced downward displacement of the engine at the time of a frontal collision based on the strong closed cross section. it can. According to the third aspect, since the heat insulating material is filled in the closed cross section, it is possible to suppress the heat released from the exhaust pipe from being transmitted to the vehicle interior. Claim 4
According to this, since the heat insulating material is made of foamed polyurethane, the operation and effect of claim 3 can be specifically obtained. According to claim 5, a tunnel portion entrance projecting upward is formed in the inclined portion of the dash panel,
Since the exhaust pipe extends almost straight from the engine toward the rear of the vehicle body and then enters the tunnel body through the tunnel entrance, bending of the exhaust pipe can be reduced, and exhaust efficiency can be improved. Can be. According to claim 6, in the dash panel, the portion defining the entrance end of the tunnel portion entrance is bulged toward the front of the vehicle body, and the length of the tunnel portion entrance in the front-rear direction is extended toward the engine room. Therefore, the engine can be more reliably guided downward by the dash panel and the dash member.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a vehicle body structure according to an embodiment.

FIG. 2 is a sectional view taken along the line II-II shown in FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 dash panel 1 a dash panel inclined portion 1 b bulging portion 2 engine room 3 cabin 4 floor panel 5 tunnel body 6 tunnel entrance 12 engine 14 exhaust pipe 30 dash member 32 heat insulating material

Claims (6)

(57) [Scope of request for utility model registration] 1. A lower portion of a dash panel that separates an engine room from a vehicle compartment is an inclined portion that is gradually located rearward of the vehicle body as it faces downward, and the engine shaft has an output shaft in a vehicle width direction. Turn sideways
An engine is disposed, and an exhaust pipe is connected to a rear side surface of the engine.
While the pipe runs along the slope of the dash panel,
The dash panel is disposed so as to extend rearward and is located above the exhaust pipe on the inclined portion of the dash panel.
Area, extending in the vehicle longitudinal direction along the slope
The lower vehicle body structure of an automobile , wherein the dash members are joined as described above . 2. The lower vehicle body structure according to claim 1, wherein the dash member and the dash panel form a closed cross section. 3. The lower body structure of an automobile according to claim 2, wherein a heat insulating material is filled in the closed cross section. 4. The lower body structure of an automobile according to claim 3, wherein the heat insulating material is made of foamed polyurethane . 5. A tunnel portion entrance which is formed in the inclined portion of the dash panel in a convex shape protruding upward and is continuous with a tunnel portion main body of a floor panel, wherein the exhaust pipe is provided from an engine to a vehicle body. after extends substantially straight toward the rear, lower body structure of a vehicle according to claim 1, wherein through the tunnel portion inlet invading into the tunnel portion in the main body, characterized in that. 6. The dash panel has a portion defining an entrance end of the tunnel entrance bulging forward, and the length of the entrance of the tunnel entrance in the front-rear direction is less than an engine length.
The lower vehicle body structure of an automobile according to claim 5, wherein the lower vehicle body structure is extended to a vehicle side.