JPH04124455A - Manifold supporting structure - Google Patents

Abstract

PURPOSE:To enable the simple and rigid fitting work of a stiffener without being restricted by layout by fixing one end part of the stiffener to a stiffener fitting bracket, provided previously at an internal combustion engine, by a fixture. CONSTITUTION:A stiffener 46 with one end part 46a thereof fitted to the internal combustion engine 2 side and the other end part 46b thereof fitted to the intake manifold 10 side respectively by fixtures is provided to support an intake manifold 10. In this case, a stiffener fitting bracket 26 is previously provided at the cylinder head 6 of this internal combustion engine 2. One end part 46a of the stiffener 46 is then fixed to the stiffener fitting bracket 26 by a first stiffener fitting bolt 50. The stiffener 46 can be thereby fitted simply and rigidly without being restricted by layout.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a manifold support structure, and more particularly to a manifold support structure in which a stiffener supporting the manifold can be easily and firmly attached.

[Prior Art] In a vehicle, as shown in FIG. 4, an intake manifold 106 attached to a cylinder head 104 of an internal combustion engine 102 is used.
Considering vibration damping, one end 108a is connected to the cylinder head 1.
04 with a mounting bolt (not shown), the other end 108b is attached to the surge tank 110 provided upstream of the intake manifold 106, and one end 112a is attached to the cylinder block 114. A second stiffener 112 is provided which is attached by a mounting bolt 116 and whose other end 112b is attached to the lower part of the intake manifold 106 to provide vibration damping properties.

In such a manifold support structure, when connecting the intake manifold, etc. and the cylinder head with a stiffener, it is not possible to tighten the mounting bolts from the side, etc. due to layout constraints. In some cases, it may be impossible to tighten the mounting bolts.

That is, as shown in FIG.
Attach the stiffener 1 to the surge tank 110.
When attaching the other end 108b of 08 with the mounting bolt 122 and connecting the intake manifold 106 and cylinder head 104 with the stiffener 108, due to layout constraints,
It may be installed without protruding from the sides of the cylinder head 104 and intake manifold 106.

In this case, when assembling the stiffener 108, one end 108 of the stiffener 108 is attached to the cylinder head 104.
It was difficult to tighten the mounting bolt 120 from the side to a.

In order to solve this problem, as shown in FIG. 7, there is a structure in which a boss part 124 is provided integrally with the cylinder head 104, and a mounting bolt 120 to one end part 108a of the stiffener 108 is tightened from above. In this case, there are restrictions when machining the manifold mounting surface 104c of the cylinder head 104, and it is difficult to protrude the boss portion 124 at an appropriate position, and the protruding end of the boss portion 124 may be lower than the manifold mounting surface 104c. Since the surface protrudes by a certain distance, there are disadvantages in that workability and productivity are reduced and the cost is increased.

In addition, as a support structure for such a manifold, for example, Japanese Utility Model Application Publication No. 1-99965, Japanese Utility Model Application Publication No. 2-31371
It is disclosed in the publication No. The cylinder head disclosed in Japanese Utility Model Application Publication No. 1-99965 has a boss provided on the cylinder head and a stiffener attached thereto, similar to that shown in FIG. 7 above. Furthermore, the device described in Japanese Utility Model Application Publication No. 2-31371 has an elastic member interposed between the collector and the connecting member of the intake pipe to achieve a vibration-proofing effect.

[Object of the Invention] Therefore, the object of the invention is to eliminate the above-mentioned disadvantages.
A bracket and socket for attaching the stiffener is pre-installed on the internal combustion engine.
By fixing one end of the stiffener to the stiffener mounting bracket using a fitting, the fitting can be easily handled when installing the end of the stiffener to an internal combustion engine, and the stiffener can be easily mounted without being subject to layout constraints. The installation work is simple and the stiffener can be firmly installed.
Moreover, the present invention aims to realize a manifold support structure that can improve the workability and productivity of cylinder heads.

[Means for solving the problem] In order to achieve this object, the present invention provides a stiffener whose one end is attached to the internal combustion engine by a fitting and the other end is attached to the manifold side to support the manifold. In the manifold support structure, a stiffener mounting bracket is provided in advance on the internal combustion engine, and one end of the stiffener is fixed to the stiffener mounting bracket using the fixture.

[Operations] According to the structure of the present invention, a stiffener mounting bracket is provided in advance on the internal combustion engine, one end of the stiffener is mounted to the stiffener mounting bracket by a fixture, and the other end of the stiffener is mounted on the manifold side.

Therefore, when attaching one end of the stiffener to the engine, the attaching direction of the fixture can be changed, and the stiffener can be easily and firmly attached without being subject to layout restrictions.

Furthermore, since there is no need to integrally provide a boss or the like to the cylinder head, the workability and productivity of the cylinder head can be improved.

[Examples] Examples of the present invention will be described below in detail and specifically based on the drawings.

1 to 3 show embodiments of this invention. In Fig. 1.2, 2 is an internal combustion engine, 4 is a cylinder block, and 6 is a cylinder head.

As shown in FIG. 2, an engine-side flange 12 of an intake manifold 10 is fixed to the cylinder head 6 with a fitting via an engine-side gasket 8. Thereby, the intake manifold 10 is attached to the cylinder head 6.

A surge tank 18 is attached to the manifold flange 14 of the intake manifold 10 via a tank-side gasket 16.

A throttle body 24 is attached to the body attachment portion 20 of the surge tank 18 via a body-side gasket 22.

For example, a stiffener mounting bracket 26 having an angled cross-section is attached to the cylinder head 6. This stiffener mounting bracket 26 is made of a rod-shaped body with a 15-shaped cross section.
The first bracket mounting portion 30 has a shape formed therein, and the other end portion 26b
a second bracket mounting portion 34 in which a second bracket mounting hole 32 is formed;
8.32 1st and 2nd cylinder side mounting pole) 36.38
, and then tighten the first and second cylinder side mounting bolts 36.
38, as shown in FIG.
, to the cylinder head 6 by being attached to the second side attachment portions 40, 42.

The first and second bracket mounting holes 28 and 32 formed in the first and second bracket mounting portions 30 and 34 are bored in a direction perpendicular to the surface of the cylinder head 6.

The other end portion 2f3b of the stiffener mounting bracket 26
A first stiffener mounting screw hole 44 is formed in the vertical direction so as to be substantially parallel to the surface of the cylinder head 6.

One end 46a of the stiffener 46 is in contact with the other end 26b of the stiffener mounting bracket 26. A first stiffener hole 48 is formed in one end 46a of the stiffener 46.

The stiffener 46 has a cross section U, for example, as shown in FIG.
It is formed into a letter shape.

One end 46a of the stiffener 46 is fixed by inserting a first stiffener mounting bolt 50 into the first stiffener hole 48 and screwing it into the first stiffener mounting screw hole 44.

The other end 46b of the stiffener 46 contacts the intake manifold 10 side, that is, the stiffener mounting portion 52 of the surge tank 18.

A second stiffener hole 54 is formed in the other end 46b of the stiffener 46. The other end 46b of the stiffener 46 is connected to the second stiffener mounting portion 52 by inserting the second stiffener mounting bolt 56 into the second stiffener hole 54.
It is attached by screwing into the stiffener attachment screw hole 58.

Next, the operation of this embodiment will be explained.

When connecting the intake manifold 10 and the cylinder head 6 using the stiffener 46, first, the stiffener mounting bracket 26 is attached to the cylinder head 6 in advance. That is, the first and second cylinder side mounting ports 1-36.38 are
It is inserted into the second bracket mounting hole 28, 32 and screwed onto the first and second head side mounting portions 40, 42 of the cylinder head 6. At this time, the intake manifold 10 and the cylinder head 4
Since there is no stiffener 46 in between, the tightening of the first and second cylinder side mounting bolts 36 and 38 is easy, and the stiffener mounting bracket 26 can be firmly mounted on the cylinder head 6. can.

The other end 28 of the stiffener mounting bracket 26
One end 46a of the stiffener 46 is in contact with the upper surface of b,
The first stiffener mounting hole 50 is inserted from above into the first stiffener hole 48 and screwed into the first stiffener mounting screw hole 44. At this time, the first stiffener mounting bolt 50 can be tightened from above, rather than from the side of the cylinder head 6, so that the one end 48a of the stiffener 46 can be easily and firmly mounted. can be made to do so.

Next, the other end 46b of the stiffener 46 is brought into contact with the stiffener mounting portion 52 of the surge tank 18, and the second stiffener mounting bolt 56 is inserted into the second stiffener hole 54 and screwed into the second stiffener mounting screw hole 58. do. At this time,
This tightening of the second stiffener attachment bolt 56 is sometimes free of obstacles, and the other end 48b of the stiffener 46 can be easily attached to the surge tank 18.

As a result, by attaching the one end portion 46a of the stiffener 46 to the internal combustion engine 2 via the stiffener attachment bracket 26, the tightening direction of the first stiffener attachment pole 50 of the stiffener 46 can be changed. The first stiffener mounting bolt 50, which is a mounting tool, can be easily handled to improve the mounting work, and the stiffener 46 can be mounted and made firm without layout constraints.

Further, since there is no need to provide a boss portion on the cylinder head as in the conventional cylinder head, the workability and productivity of the cylinder head can be improved and the cost can be reduced.

Furthermore, the stiffener mounting bracket 26 can be mounted at a desired location on the cylinder head 8.

Although this embodiment has been described with respect to supporting the intake manifold 10, it goes without saying that the exhaust manifold can also be supported in the same way.

[Effects of the Invention] As is clear from the detailed explanation above, according to the present invention,
By providing a stiffener mounting bracket on the internal combustion engine in advance and fixing one end of the stiffener to the stiffener mounting bracket with a fixture, the fixture can be easily handled when mounting one end of the stiffener on the internal combustion engine. To easily perform the work of attaching a stiffener without being restricted by layout, and to securely attach the stiffener.

Furthermore, the workability and productivity of the cylinder head can be improved, and the stiffener mounting bracket can be mounted at a desired location on the cylinder head, which is advantageous in practical terms.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention, FIG. 1 is a schematic diagram of the support structure of the manifold, FIG. 2 is an assembled diagram of the support structure,
FIG. 3 is a front view of the cylinder head on the mounting surface side of the stiffener of the cylinder head. Figures 4 to 7 show the support structure of a conventional manifold.
5 is a side view of the support structure, FIG. 5 is a plan view of another support structure, FIG. 6 is a side view of the support structure in FIG. 5, and FIG. 7 is a side view of still another support structure. In the figure, 2 is an internal combustion engine, 6 is a cylinder head, and 10 is a cylinder head.
18 is an intake manifold, 18 is a surge tank, 26 is a stiffener mounting bracket, and 46 is a stiffener.

Claims (1)

[Claims] 1. In a manifold support structure that supports a manifold by providing a stiffener whose one end is attached to the internal combustion engine by a fitting and the other end is attached to the manifold side, the internal combustion engine is provided with a stiffener mounting bracket in advance, A manifold support structure, wherein one end of the stiffener is fixed to the stiffener mounting bracket using the fixture.