JPH0517378Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to an engine baffle plate that is used in contact with an engine or engine accessory parts.

``Prior Art'' As shown in Fig. 1, in a so-called scooter-type motorcycle whose engine is covered with a rear cover 1, a fan is attached to the engine in order to efficiently cool the engine. There is a type in which external air is introduced into the rear cover 1 to forcibly cool the engine.

Figure 2 shows an example of this, in which reference numeral 2 is the engine, 3 is the crankshaft, 4 is the rear wheel, and 5 is the engine.
indicates the power transmission system. A cylinder head portion 2a of the engine 2 is covered by a shroud 6 and a fan cover 7. A fan 8 is attached to the end of the crankshaft 3 so as to rotate integrally with the crankshaft 3.

The fan 8 rotates integrally with the crankshaft 3 when the engine is running, and draws outside air into the fan cover 7 through the louver portion 9 of the fan cover 7.
The air drawn in flows upward and then flows around the cylinder head 2a and cylinder 2b of the engine 2 while being guided by the inner surface of the shroud 6, thereby appropriately cooling the engine.
It is discharged to the outside through an opening 10 formed at the rear of the shroud 6 (direction A in FIG. 3 is the front of the vehicle body).

``Problem that the invention seeks to solve'' By the way, the shroud 6 has conventionally been made of a relatively rigid material such as a steel plate or resin, and considering the variations in each part, the shroud 6 is It was difficult to arrange the shroud 6 in contact with the engine 2, and it was unavoidable that a gap S would be formed between the shroud 6 and the engine 2, etc. (see Fig. 4).

In this way, if a gap S is formed between the shroud 6 and the engine 2 or engine accessory parts such as the inlet pipe 11, warm air after cooling the engine flows out through this gap S and enters the engine. It warms up the lettuce pipe 11 and carburetor, raising the intake temperature and causing heat sag, and cooling air is discharged to the outside midway, making it difficult to cool the engine parts located downstream. If this happens, problems will occur.

The present invention has been developed in view of the above circumstances, and allows the air guide plate that forms the shroud etc. to be brought into close contact with the engine or engine accessory parts without forming any gaps. To provide a baffle plate for an engine that can efficiently cool the engine as desired without the risk of being heated by air after cooling.

"Means for Solving the Problems" In order to achieve the object of the present invention, the side facing the engine is formed with a glass wool porous layer, and the opposite side is formed with a tight layer of glass wool impregnated with resin, and The end facing the surface of the engine or engine accessories is bent so that the glass wool porous layer faces the front side, and the glass wool porous layer at this bent portion is brought into contact with the engine or engine accessories.

``Function'' The glass wool porous layer comes into contact with the engine or engine accessory parts, and since the glass wool porous layer has flexibility and can be deformed as appropriate, the gap between the baffle plate and the engine or engine accessory parts. Even if there is a relative positional shift between the air guide plate and the engine, the air guide plate can be brought into close contact with the engine, etc. without forming a gap.

``Example'' Below, an example of the present invention is shown in Figures 5 to 7.
This will be explained with reference to the figures.

This embodiment shows an example in which the present invention is applied to an engine shroud. Note that the same components as those in the conventional example described above are given the same reference numerals to simplify the explanation.

FIG. 5 is a side view of the engine shroud 21, and FIG. 6 is a cross-sectional view showing the state in which the shroud is attached to the engine. The tight layer 23 is made of glass wool impregnated with a heat-resistant resin.

In addition, this shroud 21 has an end portion 24 facing the engine 2 or the inlet pipe 11.
is bent so that the glass wool porous layer 22 is on the front side, and the engine 2 is bent with this bent portion 24.
Alternatively, it is in contact with the inlet pipe 11.

The engine shroud 21 is made by first impregnating the outer surface of cotton-like glass wool with a heat-resistant resin.
It can be easily obtained by shaping the shroud into a desired shroud shape by compression processing and by bending the ends as necessary.

According to such engine shroud 21,
Since it is in contact with the engine and the inlet pipe with a glass wool porous layer 22 that can be deformed as appropriate, the shroud 21 and the engine 2 or the inlet pipe 1 may be damaged due to variations in each part.
Even if there is some relative deviation between the shroud 21 and the engine 2, etc., the shroud 21 is brought into contact with the engine 2, etc. without creating a gap.

Further, both the glass wool and the heat-resistant resin forming the shroud 21 are resistant to heat, and therefore will not be deformed or damaged even if they come into immediate contact with an engine or the like.

In the above embodiment, the present invention is applied to an engine shroud, but the present invention is not limited to the shroud in any way, and can be applied to a wind guide plate formed in a simple flat plate shape. can also be applied.

"Effects of the Invention" As explained above, the present invention provides the following excellent effects.

It is possible to eliminate the gap that conventionally occurs between the air guide plate and the engine or engine accessories, and it is possible to reliably prevent warm air after cooling the engine from leaking to the outside.

As described above, since leakage of cooling air can be eliminated, when the engine is forcedly cooled by a fan, the air can be applied to the engine without waste, and efficient cooling can be achieved.

By bending the ends of the glass wool at the same time as forming it into a predetermined shape, it is possible to form the glass wool firmly into the desired shape.Furthermore, finishing trimming can be done at the same time as press forming, which improves production efficiency. Improvement can be measured.

Since special parts such as seal rubber are not used, parts management is easy and costs can be reduced.

If it has a structure that surrounds the engine like an engine shroud, it will ensure a good seal between the engine and engine accessories, and the inner glass wool porous layer will have a sound-absorbing effect, so it will have an excellent soundproofing effect. can get.

[Brief explanation of the drawing]

Figures 1 to 4 show a conventional example, Figure 1 is a side view showing the entire motorcycle, Figure 2 is a partial sectional view of the engine, and Figure 3 shows the arrangement of the fan cover and engine shroud. 4 is an enlarged sectional view of a part of FIG. 2, FIGS. 5 to 7 show an embodiment of the present invention, FIG. 5 is a side view of the engine shroud, and FIG. 6 is an enlarged sectional view of a part of FIG. FIG. 7 is a view similar to FIG. 4 showing the shroud installed, and FIG. 7 is a cross-sectional view taken along the line - in FIG. 2...Engine, 11...Inlet pipe,
21... Shroud, 22... Porous layer, 23
...Tight layer.

Claims (1)

[Scope of utility model registration request] The side facing the engine is formed with a glass wool porous layer, and the opposite side is formed with a tight layer of glass wool impregnated with resin, and the end facing the surface of the engine or engine accessories is formed with the glass wool porous layer on the front side. A wind guide plate for an engine, characterized in that the glass wool porous layer at the bent portion is brought into contact with the engine or engine accessory parts.