JPS60222692A - Cylinder head cover for engine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a resin cylinder head force bar for an engine.

[Prior art]

Cylinder head force bars for automobile engines have traditionally been made of metal such as aluminum alloy, but there is a trend toward using resin from the viewpoint of weight reduction and noise reduction.
Injection molded products are used in some cases. By the way, the blow-by gas that remains in the cylinder head power bar of an engine is generally sent to the intake manifold and air reach by the ventilation hose, but the cylinder head As the engine oil that lubricates the rotating parts is scattered due to the rotation of the cam etc. installed on the engine, it is mixed into the blow-by gas, so it is necessary to separate the mixed oil before sending the blow-by gas to an air cleaner, etc. be.

Therefore, an oil separator is attached to the cylinder head force bar, but with conventional injection molded products, it is necessary to mold parts such as the cylinder head force bar body and the oil separator separately, which has the disadvantage of increasing the number of parts. be.

° Also, in the case of injection molded products, since the cylinder head body is made of a single plate, the effect of blocking engine noise is small, and since the rigidity is low, resonance is likely to occur due to engine vibration, resulting in poor noise reduction effect. ◇ [Object of the present invention] In view of the above-mentioned points, the object of the present invention is to provide a resin cylinder head cover that requires fewer parts, has high rigidity, and has a large engine noise reduction effect. be.

[Configuration of the present invention]

In the present invention, the cylinder head cover main body has a hollow structure consisting of an inner wall and an outer wall integrally molded by four-dimensional molding of fiber-reinforced polyamide resin, and a protruding portion directed toward the outer wall is formed on the inner wall. The present invention relates to a cylinder head cover for an engine, the tip of which is joined to an outer wall, and the hollow part of which constitutes an oil separator part.

[Embodiments of the present invention]

Next, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a sectional view showing one embodiment of the cylinder head cover of the present invention, FIG. 2 is a partially cutaway perspective view seen from above, and FIG. 3 is a perspective view seen from below.

(1) is the main body of the cylinder head cover, and the main body (1)
is a hollow box-shaped body consisting of an inner wall (2) and an outer wall (8). This main body (1) is integrally molded by brazing molding of fiber-reinforced polyamide resin. The part where the inner wall (2) and outer wall (8) of the main body (1) meet is attached to the cylinder rod. It constitutes a flange part (4) for use. (6) is a bolt hole for mounting.

A hollow part (6) is formed between the inner wall (2) and the outer wall (8), and the inner wall (2) has a protruding part () facing toward the outer wall.
), (8) are formed, the tips of which are integrally joined to the inner surface of the outer wall (8).
The formation and joining to the outer wall (8) are carried out integrally during brie molding.

The hollow part (6) constitutes an oil separator part, that is, the inner wall (2) is provided with an introduction hole (9), and the outer wall (2) is provided with an introduction hole (9).
8) is provided with a protruding cylindrical portion having a discharge hole α. The proveby gas remaining on the cylinder head is introduced into the hollow part (6) from the introduction hole (9), where the oil is separated, and then sent from the discharge hole (1dl) to the air cleaner etc. via the pentillation hose. The liquefied oil separated from the pulley bypass is stored in a hollow part (6) near the flange part (4) and overflows from the introduction hole (9) to return into the cylinder head. .

The protrusion (8) is formed in an elongated bead shape,
It has a function as a reinforcing member and a baffle wall. In this embodiment, three protrusions (8) are provided alternately and parallel to each other, so that the prove-by gas flows in a curved manner.

The protrusion (7) is in the form of a small protrusion, and primarily functions as a reinforcing member.

The number, shape, installation location, etc. of the protrusions () and (8) may be determined as appropriate, taking into consideration the strength of the main body (1), the oil separation function, etc. Further, the protrusion (8) as a baffle wall does not need to be provided, and a protrusion (TE) may be provided instead.

In the present invention, fiber-reinforced polyamide resin is used as the resin material constituting the main body (1). This resin is preferably used from the viewpoints of high strength, excellent heat resistance, and excellent braking moldability. As the polyamide resin, Nypn-6, Ny4n-66, etc. are used. Glass fibers, carbon fibers, etc. are used as the reinforcing fibers, and glass fibers are particularly preferred. The reinforcing fibers preferably have a length of about 0.3 to 5 mm for molding purposes.

The content of reinforcing fibers is preferably in the range of 20 to 30% by weight. If it is less than 20% by weight, the strength and heat resistance will be insufficient, and if it exceeds 30% by weight, the brie molding will tend to become curly.

The blow molding of the main body (1) itself may be carried out by a conventional method.

〔Effect of the invention〕

(1) Since the cylinder head cover has a hollow structure formed by brazing, the hollow part can be used as an oil separator part, and there is no need for parts for constructing an oil separator as in the conventional example.

(2) It has a double wall structure made by blow molding, and a protrusion that functions as a reinforcing member is formed between the inner wall and the outer tank, and the molding material is fiber-reinforced polyamide resin, so it has high rigidity. - (8) Since the entire shaft has a double-walled structure and has high rigidity, the effect of blocking engine noise is large and resonance is prevented, so that noise reduction is achieved.

(4) It is inexpensive because it uses blow molding, which has lower mold costs than injection molding.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the cylinder head cover of the present invention, and FIGS. 2 and 3 are perspective views thereof. (Main symbols in the drawings) (1): Cylinder head cover body (2): Inner wall (3): Outer wall (6): Hollow part ()), (8): Protruding part Patent applicant Daihatsu Motor Co., Ltd. Figure 1 Figure 2 "33M

Claims (1)

[Scope of Claims] 1. The cylinder head force bar body has a hollow structure consisting of an inner wall and an outer wall integrally formed by blow molding of fiber-reinforced polyamide resin, and A radial cover 0 is attached to an engine cylinder in which a protrusion/mountain part facing in the direction is formed, the tip part is joined to the outer wall, and the hollow part constitutes an oil separator part.