JP3092535B2 - Engine wire harness assembly structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembling structure of an engine wire harness disposed around an engine in a vehicle.

[0002]

2. Description of the Related Art In general, an engine wire harness disposed around an engine of a vehicle has a structure in which a plurality of electric wires connecting between respective parts of the engine are bundled, covered with a tape or the like, and covered with other members. The dead space around the engine is arranged so as not to interfere with the assembling work and not to interfere with other members. For example, as shown in FIG. 4, an intake manifold 2 in which a branch pipe 22 branched from a surge tank 21 is connected to an engine block 1 and a head 11 of the engine block 1
The main wire portion 61 of the engine wire harness 6 in which the branch wire portion 62 connected to each component is branched is disposed in the gap between the main wire portion 61 and the main wire portion 61. As shown in FIG. 5, as a means for attaching the main wire 61, a boss 91 is provided on the intake manifold 2 (or the head 11 of the engine block 1), and a bracket 92 is bolted to the boss 91. Means for fixing the assembled clamp 93 to the bracket 92 has been employed.

[0003]

The gap between the head section 11 of the engine block 1 and the intake manifold 2 is where engine noise appears most recently. Recently, a sound absorbing member such as urethane has been placed in this gap. It is packed and closed. In this case, the arrangement position of the engine wire harness 6 is changed so as to avoid the sound absorbing member, or the sound absorbing member is subdivided to be provided at a position avoiding the engine wire harness 6 and its attaching means. However, in the former case, the handling of the engine wire harness 6 is deteriorated, and in the latter case, the workability of mounting the sound absorbing member is poor, and the sound absorbing effect is also reduced.

Accordingly, the present invention achieves both the disposition of the engine wire harness in the gap between the head portion of the engine block and the intake manifold, and the reduction of engine noise by installing a sound absorbing member in the gap. And,
An object of the present invention is to realize an assembling structure of an engine wire harness which has a good assembling workability and sufficiently protects an engine wire harness.

[0005]

SUMMARY OF THE INVENTION The present invention relates to an assembly structure of an engine wire harness disposed around an engine of a vehicle, wherein an elastic structure is provided between an engine block and an intake manifold so as to fill a gap therebetween. A sound absorbing member made of a material is provided, and the sound absorbing member is formed with a concave groove extending along an outer surface thereof, and an engine wire harness is embedded and held in the concave groove. Since the sound absorbing member is used as the engine wire harness holding means without being subdivided, the sound absorbing member has a good sound absorbing effect, and the wiring harness can be easily handled.

The width of the opening of the groove is formed smaller than the diameter of the engine wire harness, and the engine wire harness is press-fitted from the opening to be embedded and held in the groove. As a result, the engine wire harness is prevented from falling out of the groove.

The sound absorbing member is composed of at least two members which are overlapped with each other, an engine wire harness is embedded and held in a concave groove formed on an outer surface of one member, and the other member is one member holding the engine wire harness. (Claim 3). The holding stability of the engine wire harness is further improved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 3, an intake manifold (hereinafter simply referred to as "manifold") 2 has a surge tank 21 and a branch pipe 22 branched from the surge tank 21 and connected to the head 11 of the engine block 1. The air introduced into the surge tank 21 is supplied from the branch pipe 22 to each cylinder in the engine block 1. The branch pipe 22 is constituted by a manifold upper 22a and a manifold lower 22b in a divided structure, and both are connected via a plate-shaped connecting portion 23. The surge tank 21 is disposed above and above the head section 11 at an interval. The branch pipe 22 has a curved shape, and the surge tank 21 is connected between the manifold 2 and the head section 11 of the engine block 1. A gap 3 is formed between them. The gap 3 is closed by first and second sound absorbing members 4 and 8 made of urethane material. The first sound absorbing member 4 closes a gap 31 between the manifold lower 22b and the side surface of the head portion 11, and the second sound absorbing member 8 forms a gap 3 between the manifold upper 22a and the upper surface of the head portion 11.
Block 2.

FIG. 1 shows an engine assembling process.
This shows a state before the manifold upper 22a and the surge tank 21 are assembled to the manifold lower 22b. In this state, the first sound absorbing member 4 is provided in the gap 31. As shown in FIGS. 1 and 2, the first sound absorbing member 4 has substantially the same cross-sectional shape as the gap 31 and a slightly larger cross-sectional dimension than the gap 31. Then, the first sound absorbing member 4 is press-fitted into the gap 31 from between the connecting portion 23 at the upper end of the manifold lower 22b and the side end of the head portion 11 by using the elasticity of the urethane material. It is held in close contact with the side surface of the part 11. First
An engaging portion 41 is formed on the sound absorbing member 4, and the engaging portion 41 is engaged with the connecting portion 23 to be positioned.

[0010] The first sound absorbing member 4 is connected to the connecting portion 23.
An outer surface 42 located between the head portion 11 and a side end of the head portion 11 is formed in a planar shape, and a concave groove 5 for holding a main line portion 61 of the wire harness 6 is formed in the outer surface 42 along the longitudinal direction. I have. The concave groove 5 has a cross-sectional shape for tightly holding the main line portion 61, and has a bottom as a holding portion 51 having a circular shape slightly smaller in diameter than the diameter of the main line portion 61.
Entrance portion 5 having a width smaller than the diameter of the holding portion 51 opening to
And 2. Then, the main wire portion 61 of the wire harness 6 is pressed into the concave groove 5 from the inlet portion 52, and the main wire portion 61 is held in a state where the diameter of the holding portion 51 is expanded. A branch line portion 62 branched from the main line portion 61 of the wire harness 6
Are extended, and each branch line portion 62 is connected to a plurality of injectors 7 arranged at a predetermined interval on the upper surface of the head portion 11 of the engine block 1. In the figure, reference numeral 63 denotes a mark affixed to the main line portion 61, whereby the main line portion 6
1 is fitted into the concave groove 5.

Then, as shown in FIG. 3, the second sound absorbing member 8 is covered on the upper surface of the head portion 11 of the engine block 1, and the surge tank 21 is mounted on the manifold lower 22b.
Are connected via a connecting portion 23. The second sound absorbing member 8 is connected to the head 11
At the tip end located on the side of the injector 7, a notch 81 is formed at a portion corresponding to each injector 7.
Is provided. The second sound absorbing member 8 covers the upper surface of the head portion 11 with the injector 7 arranged in the notch 81, and fixes the base end portion 82 by sandwiching the base end portion 82 between the surge tank 21 and the head portion 11. As a result, the base end portion 82 is superimposed on the outer surface 42 of the first sound absorbing member 4, and the outer surface 4
2 to close the entrance 52 of the groove 5 in which the main wire 61 of the wire harness 6 is embedded. Note that a tunnel 83 is formed on the back surface of the second sound absorbing member 8 at a position corresponding to the branch line portion 62.
2 are stored.

According to the above embodiment, the gap 3 between the head 11 of the engine block 1 and the manifold 2
The first and second sound absorbing members 4, 8 over their entire length.
Are embedded in a series, so that the sound absorbing effect is good. Further, since the wire harness 6 is held by the two sound absorbing members 4 and 8, the wiring harness 6 can be arranged with good workability and assembling workability, and the protection of the wire harness 6 is also ensured. Further, the wire harness 6 is provided with the concave groove 5.
As a result, there is no displacement. If the portion of the wire harness 6 that fits into the concave groove 5 is clarified by the mark 63, the position correction after assembly is unnecessary.

In the above-described embodiment, since the concave groove 5 of the first sound absorbing member 4 is closed by the second sound absorbing member 8, the cross-sectional shape of the U is smaller than that of the main line portion 61.
It may be formed in a character shape.

Further, as shown in FIG.
In the case of an engine structure which does not cover the upper surface of the head portion 11 of the engine block 1, only the first sound absorbing member having a concave groove for holding the main line portion of the wire harness is provided. In this case, the main line portion can be sufficiently held by making the opening of the concave groove narrower than the main line portion and pushing the main line portion into the concave groove.

[0015]

According to the present invention, it is possible to reduce the engine noise efficiently by the sound absorbing member without deteriorating the handling of the engine wire harness, and to fix the engine wire harness as in the conventional structure. , Clamps, bolts, wire harness protection members and bosses on the manifold side are unnecessary, so the cost of parts can be greatly reduced, the workability of assembling the engine wire harness is good, and the protection performance of the engine wire harness is sufficient. It is. In addition, since the engine wire harness can be easily attached and detached, the maintenance work is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part showing an assembly structure of an engine wire harness of the present invention.

FIG. 2 is a perspective view of a sound absorbing member used for an engine wire harness assembly structure of the present invention.

FIG. 3 is a side view of an engine wire harness assembling structure of the present invention.

FIG. 4 is a perspective view showing an assembly structure of a conventional engine wire harness.

FIG. 5 is an enlarged view of a main part of a conventional engine wire harness assembling structure.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 engine block 11 head portion 2 intake manifold 3 gap 4 sound absorbing member (first sound absorbing member) 5 concave groove 52 opening 6 engine wire harness 61 main line portion 62 branch line portion 8 sound absorbing member (second sound absorbing member)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F02B 77/00 B60R 16/02 620

Claims (3)

(57) [Claims] 1. An assembling structure of an engine wire harness disposed around an engine of a vehicle, wherein a sound absorbing member made of an elastic material is provided between an intake manifold and an engine block so as to fill a gap therebetween. An engine wire harness assembling structure, wherein a concave groove extending along an outer surface of the sound absorbing member is formed, and an engine wire harness is embedded and held in the concave groove. 2. The groove according to claim 1, wherein the width of the opening of the groove is smaller than the diameter of the engine wire harness, and the engine wire harness is press-fitted from the opening to be buried and held in the groove. Engine wire harness assembly structure. 3. The sound absorbing member is composed of at least two members overlapping each other, and an engine wire harness is embedded and held in a concave groove formed on an outer surface of one of the members.
The assembly structure for an engine wire harness according to claim 1, wherein another member is superimposed on an outer surface of one member holding the engine wire harness.