JP3937500B2 - Engine fuel filter mounting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an engine fuel filter mounting apparatus.
[0002]
[Prior art]
As shown in, for example, Japanese Utility Model Laid-Open No. 2-139358, an engine fuel filter mounting device has a fuel filter holding bracket fixed to a vehicle body via an elastic member, and a fuel filter holding bracket connected to the fuel filter holding bracket via an elastic member. Some have fixed filters. According to this structure, transmission of vibration among the engine, the fuel filter, and the vehicle body can be suppressed by the both elastic members.
[0003]
Recently, from the viewpoint of improving workability, when connecting a fuel supply pipe extending from the fuel filter to the engine side to the outlet of the fuel filter, a connector is connected to either the fuel supply pipe or the outlet of the fuel filter. , And the other of the fuel supply pipe or the fuel filter outlet is fitted to the connector, thereby tending to connect the fuel supply pipe and the fuel filter outlet in one touch.
[0004]
[Problems to be solved by the invention]
However, the fuel filter always receives vibration (roll vibration) in a direction orthogonal to the output shaft of the engine from the engine side via the fuel supply pipe, and based on the vibration, the fuel supply pipe Alternatively, the other outlet of the fuel filter and the connector move relative to each other (for example, relative rotational movement), and wear (for example, wear of the O-ring inside) occurs due to the relative movement, and the outlet of the fuel supply pipe or fuel filter A fitting gap between the other of the two and the connector is to be widened. For this reason, in such a case, the sealing property of the connector is to be lowered.
[0005]
The present invention has been made in view of the above circumstances, and an object of the present invention is to improve the sealing performance of a connector that fits and connects a fuel supply pipe and an outlet of a fuel filter with one touch. is there.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, in the invention of claim 1,
The side region of one of the lateral side of the engine as viewed from the output shaft direction of the engine, the fuel filter is disposed with a predetermined distance away from the engine, the delivery pipe in the the outlet of the fuel filter engine And a connector that can be fitted and held in a liquid-tight manner in a relatively movable manner between the fuel supply pipe and the outlet of the fuel filter. In the fuel filter mounting device,
The fuel supply pipe has a pipe component extending in a direction substantially toward the output shaft of the engine on the engine side of the fuel filter;
The fuel supply pipe is a part of the fuel supply pipe that is closer to the fuel filter than the pipe component and downstream of the connection part to the connector, separately from the connection part to the connector. The fuel filter is fixed to the fuel filter. The preferred aspect of the first aspect is as described in the second aspect.
[0007]
【The invention's effect】
According to the first aspect of the present invention, since the fuel supply pipe has a pipe component that extends substantially in the output shaft direction of the engine, the fuel filter is arranged in a direction perpendicular to the engine output shaft. Under the constraint of having to be located within a certain distance from the engine, the pipe component can be newly placed between the fuel filter and the engine, and the pipe component allows the engine output. The vibration of the direction orthogonal to the axis is received by changing the vibration mode, and the vibration can be absorbed also by the pipe component, and the wear of the connector based on the relative movement between the outlet of the fuel supply pipe or the fuel filter and the connector. Can be suppressed. For this reason, the sealing property of the connector which fits and couples the fuel pipe and the outlet of the fuel filter with one touch can be improved.
In addition, the fuel filter and the fuel pipe can be integrated to prevent relative vibration between the fuel filter and the fuel pipe based on vibration including fine vibration from the engine side.
[0008]
According to the second aspect of the present invention, since a plurality of pipe components are provided, vibrations can be absorbed more with the plurality of pipe components. For this reason, the sealing property of the connector can be further improved.
[0009]
According to the third aspect of the present invention, as the plurality of pipe components, one component disposed near the engine and the other disposed closer to the fuel filter than the one component. The fuel supply pipe is connected to the one component and the other component at a substantially right angle, and communicates between the one component and the other component. Therefore, the vibration can be absorbed by one constituent part, the other constituent part, and the connecting part while maintaining the function as a fuel supply pipe. The embodiment can be obtained specifically.
[0010]
According to the invention described in claim 4, since the upstream portion of the connecting portion and the downstream portion of the connecting portion are offset, the vibration mode can be changed between the upstream portion and the downstream portion of the connecting portion. And vibration absorption at the connecting portion can be enhanced.
[0011]
According to the invention described in claim 5, since the fuel filter is fixed to the vehicle body fixing bracket fixed to the vehicle body via the elastic member, the vibration can be absorbed by the elastic member .

[0012]
According to the sixth aspect of the present invention, since the fixing position of the fuel supply pipe with respect to the fuel filter is close to the position of the elastic member, even if vibration is transmitted to the fuel supply pipe, Vibration can be effectively absorbed by the elastic member.
[0013]
According to the seventh aspect of the present invention, the fuel supply pipe extends upward from the downstream side of one of the components, and rises to receive the vibration in the direction perpendicular to the output shaft of the engine as the bending vibration in the same direction. Therefore, the bending vibration of the rising part is mainly converted into torsional vibration in one component part, and the torsional vibration of one component part is mainly converted into expansion and contraction vibration in the connecting part. The expansion and contraction vibrations are mainly converted into flexural vibrations in the first component, and the vibrations can be absorbed at each location of the fuel supply pipe. For this reason, vibration from the engine side can be accurately absorbed and transmission of vibration to the fuel filter can be suppressed as much as possible.
[0014]
According to the invention described in claim 8, the downstream end portion of the rising portion and the connection end portion on the engine side are connected via the connector that can be fitted and held in a fluid-tight manner by simply being inserted, and the fuel supply pipe Is fixed to the engine side, so that not only the connection work of the fuel supply pipe to the engine side can be improved based on the connector, but also the fuel supply pipe can be connected to the engine even if such a connector is used. By fixing to the side, it is possible to suppress the sealing property of the connector from being reduced by vibration.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, reference numeral 1 denotes a vertically mounted engine, and the engine 1 is arranged so that the output shaft direction (left and right direction in FIGS. 1 and 2) faces the vehicle body longitudinal direction. An intake manifold 2 and a fuel filter 3 are arranged in this order in the direction far from the engine 1 on one side of the engine 1 on the side in the output shaft direction. The intake manifold 2 has an upstream end connected to an intake system (surge tank) 4 and a downstream end connected to an intake port (not shown). The shape of the intake manifold 2 is as shown in FIG. On the upper end side of the engine 1, the engine 1 once extends away from the engine 1, and then reverses and curves toward the engine 1 again.
[0016]
The fuel filter 3 has a function of filtering the fuel supplied to the engine 1 side (delivery pipe) as shown in FIGS. 2 to 5, and a projecting inflow port 5 is provided at a lower portion thereof. On the other hand, a projecting outlet 7 is provided at the upper part via a pulsar damper 6. A mounting tool 8 is mounted around the fuel filter 3, and the mounting tool 8 includes flange portions 8 a and 8 b that protrude outward in the radial direction of the fuel filter 3. The portion 8 a extends along the outlet 7, and one flange portion 8 a is provided with an extending portion 9 that extends further outward and is positioned in front of the outlet 7.
[0017]
A side frame 10 is disposed below the fuel filter 3 so as to extend in the longitudinal direction of the vehicle body, as shown in FIG. As shown in FIGS. 1 and 2 to 5, a vehicle body side fixing bracket 11 is erected on the side frame 10, and the bracket 11 is a base plate portion 12 fixed to the side frame 10. And an upright wall portion 13 that rises from the base plate portion 12 and flange portions 14 a and 14 b that protrude outward from both sides of the upright wall portion 13. Both flange portions 8a, 8b of the fixture 8 are fixed to both flange portions 14a, 14b of the bracket 11 via elastic members 15a, 15b, 15c, whereby the fuel filter 3 is elastic member 15a ( 15b, 15c) and is held by the bracket 11, and at this time, the outlet 7 of the fuel filter 3 is opened toward the rear of the vehicle body which is substantially one of the output shaft directions of the engine 1.
[0018]
As shown in FIGS. 1 to 3, one end of a fuel pipe 17 is connected to the outlet 7 via a connector 16. As shown in FIG. 6, one end of the connector 16 is liquid-tightly fitted and held in one end of the fuel pipe 17, while the other end has an O-ring 18, a bush 19, a retainer. 20 is arranged, so that the protruding outlet 7 can be fitted and held in a liquid-tight manner with one touch in the other end.
[0019]
The fuel supply pipe 17 has a function of supplying fuel to a fuel injection valve (not shown) via a delivery pipe (not shown). The fuel supply pipe 17 is shown in FIGS. As shown, the pipe component includes a first component 21, a second component 22, a third component 23, a fourth component 24, and a fifth component 25. The first component 21 is bent downward at a substantially right angle from the portion that has passed through the connector 16 and extends to a position below the intake manifold 2, and the first component 21 is shown in FIG. As shown in FIG. 5, the extension portion 9 is held by the clip 26 (in FIG. 3, the insertion hole into which the clip 26 is inserted is denoted by the reference numeral 26 for convenience, and is shown in other drawings. Abbreviated). As shown in FIG. 3, the holding position of the first component 21 by the clip 26 is set in the vicinity of the elastic member 15a.
[0020]
The second component 22 is bent forward at a substantially right angle with respect to the first component 21 and extends forward of the vehicle while maintaining a substantially horizontal state.
[0021]
The third component portion 23 is bent substantially inward in the vehicle width direction at a substantially right angle with respect to the second component portion 22, and extends to the vicinity of the downstream end of the intake manifold 2 below the intake manifold 2. . In the present embodiment, the third component 23 is configured such that the upstream portion 23a is bent slightly toward the rear of the vehicle body while gradually lowering the height from the downstream end of the second component 22. The downstream portion 23 b of the portion 23 extends inward in the vehicle width direction from the downstream end of the upstream portion 23 a and reaches the vicinity of the downstream end of the intake manifold 2.
[0022]
The fourth component 24 is bent to the front of the vehicle body at a substantially right angle while being slightly higher than the downstream portion of the third component 23, and extends to the front of the engine 1, and is shown in FIG. As described above, the fourth component 24 is configured to suppress the vibration of the fourth component 24 by holding the clip 27 on the bracket 28 provided in the intake manifold 2.
[0023]
The fifth component 25 is bent upward at a substantially right angle from the downstream end of the fourth component 24 and extends substantially to the height position of the outlet 7. A connector 29 similar to the connector 16 is attached to the downstream end of the fifth component 25, and a delivery pipe is connected to the connector 16.
[0024]
The fuel supply pipe 17 is integrally coated with nylon 30 on the outer periphery of the resin pipe on the inner side of both ends of the pipe.
[0025]
In such a configuration, the roll vibration based on the engine 1 is transmitted to the fuel filter 3 through the fuel supply pipe 17, and the vibration is caused by bending of each part of the fuel pipe 17. Therefore, the vibration is effectively absorbed by bending, twisting, expansion and contraction, and the transmission of vibration to the fuel filter 3 can be considerably suppressed. For this reason, it is possible to prevent the O-ring 18 and the like in the connector 16 from being worn by vibration and prevent the sealing property of the connector 16 from being deteriorated.
[0026]
The specific phenomenon of the fuel supply pipe 17 is caused by complicated intertwining of several phenomena, and typical phenomena among them will be described.
[0027]
When roll vibration based on the engine 1 is generated, the vibration is generated at the downstream end of the fifth component 25 of the fuel supply pipe 17 (the upper portion of the fifth component 25 in FIG. 4). 2 and 4, the vibration is deflected in the left-right direction in FIGS. 2 and 4, and the vibration is absorbed and the vibration is attenuated. This damped vibration is further converted into torsional vibration of the fourth component 24 based on the fact that the fifth component 25 and the fourth component 24 are bent at substantially right angles, and the vibration is also absorbed by this. Is done.
In this case, the upstream end of the fifth component 25 (the lower portion of the fifth component 25 in FIG. 4) is the downstream end of the fifth component 25 (the upper portion of the fifth component 25 in FIG. 4). On the other hand, since the bending radius is reduced, the bending amount (amplitude) is reduced, and the torsion amount transmitted to the fourth component 24 is reduced.
[0028]
When vibration remains in the fourth component 24, the torsional vibration of the fourth component 24 is caused by the third component 23 to bend at a substantially right angle between the third component 23 and the fourth component 24. Therefore, the vibration is mainly converted into the vibration that causes the third component 23 to expand and contract in the extending direction, and the vibration is absorbed based on the expansion and contraction of the third component 23, and the vibration is also attenuated here.
[0029]
If vibration still remains in the third component 23, the expansion / contraction vibration is converted into a vibration that bends the downstream end of the second component about the substantially axial center of the first component 21. The vibration is absorbed by the bending.
[0030]
If vibration still remains after this absorption, the flexural vibration is caused by the torsional vibration of the first component 21 based on the fact that the first component 21 and the second component 22 are bent at substantially right angles. The vibrations are absorbed by this as well.
In this case, the upstream end of the second component 22 (the upper portion of the second component 22 in FIG. 2) is the downstream end of the second component 22 (the lower portion of the second component 22 in FIG. 2). On the other hand, since the bending radius is reduced, the bending amount (amplitude) is reduced, and the torsion amount transmitted to the first component 21 is reduced.
[0031]
If vibration still remains, the torsional vibration of the first component 21 causes the connector 16 to swing, and this is absorbed by the elastic member 15a and the like.
[0032]
In this way, the vibration is sequentially absorbed while changing the vibration state at each bent portion of the fuel supply pipe 17, and finally, the vibration is also absorbed by the elastic member 15a and the like. The vibration transmitted to the fuel filter 3 is considerably suppressed.
[0033]
Needless to say, the present invention is not limited to the above-described mode, and based on the fact that the upstream portion 23a of the third component 23 is offset with respect to the downstream portion 23b (see FIG. 2), the fourth component 24 is downstream of the third component 23. The stretching vibration transmitted to the portion 23b causes the upstream portion 23a to swing around a virtual axis that passes through the connecting portion between the upstream portion 23a and the second component 22, and further, Torsional vibration causes the third component 23 to oscillate about the substantially axial center of the fourth component 24, and the roll vibration of the engine 1 is absorbed by various phenomena including these. Will be.
[0034]
Further, since the first component portion 21 is held by the extension portion 9 of the fixture 8 by the clip 26, it is possible to suppress relative vibration between the fuel filter and the fuel supply pipe 17 due to vibration including fine vibration. It will be possible.
[0035]
Further, since the holding position of the first component 21 by the clip 26 and the elastic member 15a are as close as possible, the vibration applied to the first component 21 (fuel filter 3) held by the clip 26 is The elastic member 15a can absorb effectively.
[0036]
A connector 29 is also attached to the downstream end of the fuel supply pipe 17. However, as shown in FIG. 2, the connector 29 is fixed to the intake manifold 2 by a clip 27. It is supposed that the property is reduced based on vibration.
[Brief description of the drawings]
FIG. 1 is a plan view showing an arrangement of a fuel filter mounting device according to an embodiment.
FIG. 2 is a plan view showing an arrangement state of a fuel supply pipe according to the embodiment.
3 is a front view of the fuel supply pipe arrangement of FIG. 2;
4 is a view of the fuel supply pipe arrangement of FIG. 2 as viewed from the left side. FIG.
FIG. 5 is an enlarged view showing the arrangement of a fuel filter, a vehicle body side fixing bracket, a fixture, an extension part, a clip, and the like.
FIG. 6 is an explanatory diagram illustrating a connector used in the embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Engine 2 Intake manifold 3 Fuel filter 7 Outlet 8 Attachment 9 Extension part 10 Side frame 11 Car body side fixing bracket 15a Elastic member 16 Connector 17 Fuel supply pipe 21 First component 22 Second component 23 First 3 component 23a 3rd component upstream 23b 3rd component downstream 24 4th component 25 5th component 26 clip 27 clip 29 connector

Claims (8)

The side region of one of the lateral side of the engine as viewed from an output axis of the engine, the fuel filter is disposed with a predetermined distance away from the engine, the delivery pipe in the the outlet of the fuel filter engine And a connector that can be fitted and held in a liquid-tight manner in a relatively movable manner between the fuel supply pipe and the outlet of the fuel filter. In the fuel filter mounting device,
The fuel supply pipe has a pipe component extending in a direction substantially toward the output shaft of the engine on the engine side of the fuel filter;
The fuel supply pipe is a part of the fuel supply pipe that is closer to the fuel filter than the pipe component and downstream of the connection part to the connector, separately from the connection part to the connector. Fixed to the fuel filter,
A fuel filter mounting device for an engine. In claim 1,
A plurality of the pipe components are provided,
A fuel filter mounting device for an engine. In claim 2,
As the plurality of pipe constituent parts, one constituent part disposed in the vicinity of the engine and the other constituent part disposed near the fuel filter rather than the one constituent part are provided.
The fuel supply pipe has a connecting portion that is connected to the one component portion and the other component portion substantially at right angles to communicate the one component portion with the other component portion. ing,
A fuel filter mounting device for an engine. In claim 3,
The connecting part is set so that the upstream part of the connecting part and the downstream part of the connecting part are offset;
A fuel filter mounting device for an engine. In claim 1,
The fuel filter is fixed to a vehicle body fixing bracket fixed to the vehicle body via an elastic member,
A fuel filter mounting device for an engine. In claim 5,
A fixed position of the fuel supply pipe with respect to the fuel filter is close to a position of the elastic member;
A fuel filter mounting device for an engine. In claim 3 or 4,
The fuel supply pipe also has a rising portion that extends upward from the downstream side of the one component and receives vibration in a direction orthogonal to the output shaft of the engine as bending vibration in the same direction.
A fuel filter mounting device for an engine. In claim 7,
The downstream end portion of the rising portion and the connection end portion on the engine side are connected via a connector that can be fitted and held in a fluid-tight manner just by being inserted,
The fuel supply pipe is fixed to the engine side;
A fuel filter mounting device for an engine.

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