JPH03135831A - Attaching structure of fuel pipe for vehicle - Google Patents

Abstract

PURPOSE:To suppress the degradation of the stiffness of a floor panel and to make piping easy by inserting several kinds of fuel pipes all together through only one penetrated portion provided on an adequate position of the floor panel. CONSTITUTION:On an adequate position of a floor panel of a trunk room of a car, on the nearly middle portion of the distance L between the center line O of the car and a rear side member 12, only one penetrated portion 20 is provided. And through the penetrated portion 20, a feeding pipe 4 leaded out from a fuel tank out the figure, a return pipe 6 and a evaporation tube 7 are inserted all together through a grommet 21 respectively. The feeding pipe 4 is cut below the floor panel, and both cut portions are connected to each other with a flexible fuel hose 22. Thereby the degradation of the stiffness of the floor panel due to the construction of the penetrated portion 20 can be made minimal, and the piping of all pipes or the like can be made easy.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is characterized in that a Fucoel tank is mounted on a floor panel in a trunk room, and at least a fuel supply system pipe in a fuel pipe led out from the fuel tank is mounted under the floor panel. The present invention relates to a mounting structure for vehicle fuel pipes that are interconnected using flexible fuel hoses.

2. Description of the Related Art In general, in the case of a vehicle in which a fuel tank is mounted on a floor panel in the trunk room, various fuel pipes led out from the fuel tank are connected to the floor panel by inserting a grommet or the like through a penetration part opened in the floor panel. There is a known configuration in which the air pressure is guided to the bottom of the engine and connected to the intake system of an internal combustion engine.

For example, as shown in the main part plan view of FIG. A feed pipe 4 (fuel supply system pipe) led out from a mounted fuel tank (not shown) is inserted, and a return pipe and evaporative tube 7 are inserted through a similar grommet 5 to the other side through-hole 2b. It is inserted. The above return pipe is a pipe that returns fuel from the carburetor to the fuel tank in order to reduce the rise in fuel temperature in the carburetor (not shown), and the evaporative tube 7 is a tube that guides evaporative gas in the fuel tank to the outside. . In addition, 8 shown in the same figure is a propeller shaft, 9 is a differential housing, and the axle 10a is extended from the differential housing 9 in the vehicle width direction.
, IQb is prolonged.

In addition, 11 has a floor l<nel 1 in order to reduce exhaust noise.
A muffler 12 is a rear side member disposed below the muffler 11, and an exhaust pipe 13a connected to the muffler 11.
, 13b are equipped with pre-mufflers 14a, 14b, and the other ends of the exhaust pipes 13a, 13b are connected to an internal combustion engine (not shown).

In the case of such a conventional configuration, from the viewpoint of safety and disaster prevention, at least the above-mentioned feet)<the one side through-hole 2a through which the eve 4 is inserted are the exhaust pipes 13a.

13b, so that even if fuel leaks from the feed pipe 4, the fuel will not drip onto the high-l crystal exhaust pipes 13a, 13b. are doing.

Problems to be Solved by the Invention However, in such a conventional vehicle fuel pipe mounting structure, from the above-mentioned security and disaster prevention viewpoints, the penetration portion 2a through which the feed pipe 4 is inserted is replaced by the exhaust pipes 13a, 13b. It must be formed at a predetermined location on the floor panel 1 that corresponds to a position away from directly above the
From the perspective of wiring layout with other fuel pipes,
at least two penetration parts 2a on the floor panel l;
2b must be provided, so that the floor panel I
In addition to reducing the rigidity of the cable itself, the number of parts such as the grommets 3.5 and the number of man-hours for assembling the cables increased, leading to an increase in cost.

In other words, the floor panel l is a member to which many vehicle accessories such as belt tensioners are fixed, and is also a strength member to ensure the safety of the driver in the event of a vehicle collision, so it has great rigidity. However, the plurality of penetration parts 2a, 2 described above are required to be
There is a habit that the provision of b reduces the rigidity of the floor panel 1.

Furthermore, the work of separately routing fuel pipes to the plurality of penetration parts 2a and 2b is cumbersome and causes an increase in the number of man-hours.

Therefore, the present invention solves the problems of the conventional fuel pipe mounting structure, reduces the number of parts and assembly man-hours when arranging the fuel pipe, and secures the rigidity of the floor panel. The purpose of this invention is to provide a fuel pipe mounting structure that allows for the installation of fuel pipes.

Means for Solving the Problems In order to achieve the above object, the present invention mounts a fuel tank on a floor panel, and positions a plurality of various fuel pipes led out from the fuel tank inside a rear side member. In a mounting structure for a fuel pipe for a vehicle, which is connected to an internal combustion engine after being led downward from a penetration portion formed in a floor panel, first, claim A penetration part is formed in an appropriate part of the floor panel located in the middle of the member, and a plurality of various fuel pipes led out from the fuel tank are pushed through the penetration part all at once. , and at least a fuel supply system pipe in the fuel pipe below the floor panel is divided, and the divided portion is connected using a flexible fuel hose. The fuel hose that connects the separated parts of the fuel pipe has a distance between the approximately central part of the fuel hose and the above-mentioned part, which is longer than the distance on a plane between both ends of the fuel hose and the exhaust pipe disposed below the floor panel. This is because the configuration is such that the distance between the exhaust pipe and the exhaust pipe is larger on a plane.

According to this configuration, since only one penetration part is formed as an opening on the floor panel, there is no risk that the rigidity of the floor panel itself will decrease, and furthermore, there is no risk that the rigidity of the floor panel itself will decrease. Since the various fuel pipes are routed all at once, it is possible to simplify the wiring layout and reduce the number of assembly steps.

Additionally, there is a leak in the fuel pipe below the floor panel.
The shape of the fuel hose that connects the split point of the feed pipe, which is also a pipe of the fuel supply system, is determined by the distance on the plane between the center of the fuel hose and the exhaust pipe located below). Even if the fuel hose should come off the feed pipe, the fuel will not drip directly into the hot exhaust pipe. Therefore, even if the penetrating portion is located above the exhaust pipe, it is possible to obtain the same effect in terms of safety and disaster prevention.

EXAMPLE Hereinafter, an embodiment of the mounting structure for a vehicle fuel pipe according to the present invention will be described in detail based on FIGS. 1 and 2, with the same reference numerals attached to the same components as in the conventional structure. .

Fig. 1 is a plan view showing the main parts of the present invention, and Fig. 2 is a side view of the same. In particular, Fig. 1 shows the state with the floor panel l removed for convenience in order to clearly show the mounting structure of various fuel pipes. It shows.

In the figure, 20 indicates the position of the only penetrating part provided at an appropriate location on the floor panel 1. A feed pipe 4 (fuel supply system pipe) led out from the fuel tank, a return pipe, and an evaporative tube 7 are inserted all together.

As mentioned above, the return pipe is a pipe that returns fuel from the carburetor (not shown) to the fuel tank.
The evaporative tube 7 is a tube that guides evaporative gas in the fuel tank to the outside.

12 is one rear side member 13a.

13b is an exhaust pipe connected to a muffler (not shown) disposed below the floor panel 1, and the exhaust pipes 13a, 1
The other ends 13c and 13d of 3b are connected to an internal combustion engine (not shown).

8 is a propeller shaft, 9 is a housing for a differential gear, and axles ioa and ]Ob extend from the differential housing 9 in the vehicle width direction.

In the case of the illustrated example, the penetration portion 20 provided in the floor panel 1 is located between the center line 0 of the vehicle and the rear side member 12.
Located at an appropriate location approximately in the middle of the distance tI L from the
In particular, in this example, the opening is formed at a position corresponding to the upper part of the exhaust pipe 13a on one side.

Further, among the fuel pipes, the feed pipe 4 in particular is divided below the floor panel 1, and the divided portions are interconnected using a flexible fuel hose 22.

In this embodiment, the return pipe constituting the fuel pipe is similarly divided below the floor panel l, and this divided point is similarly connected using a flexible fuel hose 23. There is.

When looking at the fuel hose 22 that connects the divided part of the feed pipe 4, 3.
The distance B on the plane between the substantially central part of the fuel hose 22 and the exhaust pipe 133 is larger than the distances A and A' on the plane between both ends of the fuel hose 22 and the exhaust pipe l3a located below. It is considered.

In other words, the layout of the divided portion of the feed pipe 4 is set in advance so that the fuel hose 22 maintains a substantially doglegged shape. Distance B on a plane between the central part of the hose 22 and the exhaust pipe 13a is defined as distance A on a plane between both ends of the fuel hose 22 and the exhaust pipe 13a,
It can be set to be longer than A'.

According to the configuration of the present invention, only one penetrating portion 20 is formed as an opening on the floor panel 1, so there is no fear that the rigidity of the floor panel 1 itself will be reduced.

Further, since various fuel pipes are routed through the through-hole 20, the layout of the route is simplified and the number of assembly steps is reduced. or,
Since fewer parts such as grommets are required during assembly, there is an advantage that costs can be reduced.

Furthermore, in this embodiment, the fuel hose 22 that connects at least the cut point of the feed pipe 4 of the fuel supply system in the fuel pipe below the floor panel 1 is set to maintain a substantially doglegged shape. Therefore, the distance B on the plane between the central part of the fuel hose 22 and the exhaust pipe 13a located below is longer than the distances A and A' on the plane between both ends of the fuel hose 22 and the exhaust pipe 13a,
Even if the fuel hose 22 should come off from the feed pipe 4, the effect is obtained that the fuel will not be dripped directly into the high-temperature exhaust pipe 13a.

Therefore, even if the penetrating portion 20 is located above the exhaust pipe 13a as in this embodiment, there is no problem in terms of safety and disaster prevention.

Effects of the Invention As explained in detail above, according to the feed pipe mounting structure according to the present invention, only one penetrating portion is provided at an appropriate location of the floor panel located between the center line of the vehicle and the rear side member. At the same time as forming an opening, a plurality of various fuel pipes led out from the fuel tank are inserted into the penetration part at once, and at least one of the fuel pipes of the fuel supply system is separated below the floor panel. Since the separated parts are connected using a flexible fuel hose, there is no risk of the floor panel itself decreasing in rigidity, ensuring the safety of the driver in the event of a vehicle collision with the floor panel. In addition to having a function as a strength member for the floor panel, it is possible to arrange many other vehicle accessories on the floor panel.

In addition, since various fuel pipes are routed all at once through the one penetration part, the wiring layout is simplified, and the number of parts and assembly man-hours are reduced, resulting in lower costs. The effect of

Furthermore, according to the structure of claim 2 of the present invention, there is a gap between both ends of the fuel hose connecting at least the part of the fuel supply system pipe in the fuel pipe and the exhaust pipe disposed below the floor panel. Since the distance on the plane between the substantially central part of the fuel hose and the exhaust pipe is set to be larger than the distance on the plane of
Even if the fuel hose becomes disconnected from the fuel supply system pipe, fuel will be prevented from dripping directly into the high-temperature exhaust pipe, and this will have the same effect in terms of safety and disaster prevention. can get.

[Brief explanation of the drawing]

Fig. 1 is a plan view of essential parts showing an embodiment of the mounting structure for a vehicle fuel pipe according to the present invention, Fig. 2 is a side view from the striking direction of Fig. 1, and Fig. 3 is a plan view of a conventional fuel pipe. FIG. 3 is a plan view of main parts showing an example of a mounting structure. 1... Floor panel, 4... Feed pipe, 6...
・Return pipe, 7...Evapo tube, 8...
Propeller/Naft, 9. Differential housing, 12. Rear side member 13a. 13b...Exhaust pipe, 20...Penetration part,...Grommet 22゜23...Fuel hose, Fig. 4 Feed pipe 6- Retano pipe 7 Evaporative tube 8 Provelan shaft 9...Differential housing 101, axle 12 Rear sight fitting 13a, I:l Exhaust pipe 20 Penetration part 21 Grommet 22 Fuel, -z

Claims (2)

[Claims] (1) A fuel tank is mounted on the floor panel, and a plurality of various fuel pipes led out from the fuel tank are routed downward from the floor panel through a through hole formed in the floor panel located inside the rear side member. In the vehicle fuel pipe installation structure that is connected to the internal combustion engine, one penetration part is opened at an appropriate part of the floor panel located midway between the center line of the vehicle and the rear side member. At the same time, a plurality of various fuel pipes led out from the fuel tank are inserted into the above-mentioned penetration part at once, and at least the pipe of the fuel supply system among the fuel pipes is separated below the floor panel. A mounting structure for a fuel pipe for a vehicle, characterized in that divided points are connected using a flexible fuel hose. (2) The fuel hose that connects the split points of the fuel pipe is determined to be approximately 2. The vehicle fuel pipe mounting structure according to claim 1, wherein the mounting structure has a shape such that a distance on a plane between the central portion and the exhaust pipe is larger.