JPS58149468A - Metallic gasket functioning also as oil seal - Google Patents

Abstract

PURPOSE:To effectively prevent leakage of an oil concurrently, by providing an elastic metallic plate with a bead for forming two seal lines which surround, on inner and outer sides, a fitting line appearing on a deck surface of a cylinder block. CONSTITUTION:A metallic gasket 12 is provided with the bead 15 having a cross-sectional shape projecting to the side of a cylinder head 4. Namely, the first seal line 16 and the second seal line 18 are provided on the cylinder block 2 side, while the third seal line 20 is provided on the cylinder head 4 side. In addition, the fitting line 17 is surrounded on the outer and inner sides thereof by the first seal line 16 on the outer side and the second seal line 18 on the inner side.

Description

[Detailed description of the invention] This opening relates to the improvement of metal gaskets for internal combustion engines,
The present invention relates to a metal gasket having an oil leakage prevention mechanism that uses seal #1 to prevent oil leakage and reduce oil loss, as well as to prevent staining of the outer circumference of the cylinder block due to leaked oil.

A metal gasket, which prevents pressure leakage in a combustion chamber by forming a bead on a metal plate made of an elastic material, was originally created by the Ministry of Invention of the present application and has already been filed.

This gold gasket uses the fastening force of the bolt that joins the cylinder head and cylinder block to form an elastic seal line between the joint surfaces of the two bodies, thereby increasing the sealing effect. There is.

By the way, a cylinder liner 3 is fitted into the cylinder rim 2 as shown in FIG. 1 to form a cylinder. There is inevitably a gap between the fitting surface, which is the contact surface between the cylinder block 2 and the cylinder liner 3, and the oil in the crank chamber rises through this gap, causing the cylinder block 2 and cylinder head 4 to rise. It leaks from the joint surface to the outside, causing a decrease in oil and staining the outer surfaces of the two engines, causing great inconvenience to the drivers of two-wheeled vehicles, and an improvement is desired.90Therefore, the purpose of this invention is to The actual method is to use a metal gasket seal line to prevent oil leakage.

Embodiments of the present invention will be described below based on the drawings.

A cylinder liner 3 is fitted into the cylinder protrusion 2 to form a cylinder. Also, to the 4Fi cylinder,
6 is a piston, and 8 is a combustion chamber.

= l! I; /su/Dazolet Iri 2 and 7s/da head 4 1''/All1l or human-kori stand ai+, hard surface 10 or formed 714 j Kono f5 unit F14111J
5. A gold maple gask according to the present invention is interposed.

112 is convex, that is, in the second enlarged view, there is a taped surface protruding to the cylinder as shown in Fig. 4. do.

t, that is, the first ring wire 16. which is attached to the two seals on the cylinder lock 21i111. The second/- line line 18 appears, and the third line Iv20 goes to the end.
This is what forms the bead 15 that appears in lJII. Moreover, iiJ Ad outside - 5+! The J1 run line 16 and the inner 2 run line kMis surround the beast line 17.

Ishi 10, /su/Douglower 2 and cylinder head 4 are joined together by the fastening force of the -r route. C1! J + U K Nega gas, G 12 is cylinder block 2
and IuJ FIJ of the cylinder head 4, that is, the joining direction C is deformed as shown in Figure 3. That is, the seal line is clearly cut out on the joint surface, and the seal seedlings are exhibited.

As shown in FIG. 7, the first/- loop 16 and the second seal &+18 can surround the fitting-17 from the inside and outside, thereby preventing leakage of the fourth loop.

Figure 4 shows the second fruit of this invention.

The % mark of this embodiment lies in the fact that the number of seal lines is four. With this configuration, oil leakage 7 can be prevented in the same manner as in the above-mentioned embodiment 0, and leakage can also be effectively prevented. In other words, the partial gas from the combustion chamber is transferred to the second seal line 24. and the fourth seal edge 28 and the first bead chamber 26 respectively.
．． Even if the gases enter the second bead chamber 27, the second seal M24. 4th sticker @2
8Q) Sufficient M [is prevented from coming out, resulting in a pressure drop.

ii+41 bead chamber 26. Since the inside of the 26th bead chamber 27 is in a relatively low pressure state, these 881 bead chambers 26°
The gas that has entered the bead chamber 27 further passes through the respective first seals @16. This does not generate enough energy to pass through the third seal line 20 and can effectively prevent pressure leakage.

In addition, since there are two seal wires on the cylinder head side and cylinder Glock-1, each of which is deformed a/Lε, the saw contact surface pressures of 7-L and -1 are set to be the same.2. It is possible to have a balanced dk and produce an ideal seal young fruit with a 4+f characteristic.

J-) As is clear from the extensive continuous power of F., according to this invention, the gold M
In addition to preventing Ih, it also effectively prevents oil leakageμ)J
LI- 1 thing to do! It can produce young fruits called . What's more, a single synthetic gasket can provide reliable gas and oil seals.

Unlike conventional asbestos-phase gaskets, which have the disadvantage of being too thick, it is possible to narrow the curved gap between the cylinder head and the cylinder nozzle, thereby ensuring thermal conductivity and improving the robustness of the engine. .

41 is a schematic longitudinal sectional view showing a first embodiment of the present invention;
Figure 2 F, L Enlarged view of the arrow ■ part in Figure 1, Figure 3 11
The second embodiment is shown in FIG.
Ij diagram.

In the figure, (, 2 is cylinder lock + 4 ki
”!J da head, 10 is the joining direction, 12ii metal gasket.

), 16.1g, 20.22 are sealed wires, and 15r
It is a ri bead.

Agent: Patent Attorney Yoshimi Nishigo Figure 1 only Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] Animal house 411 that appears on the deck surface of the cylinder block by fitting the cylinder liner to the cylinder block
1'i, A metal gasket characterized in that a bead forming two seal lines surrounding the inside and outside is provided on an elastic base.