JPS6316815Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas-liquid separation device for blow-by gas in a cylinder head cover of an internal combustion engine, when the blow-by gas is extracted to a blow-by gas processing section such as an intake system.

In this type of blow-by gas gas-liquid separator, the formation of the gas-liquid separation chamber integrally with the cylinder head cover is known as prior art.
It is known from Publication No. 58538. In this way, when the blow-by gas inside the cylinder head cover is once introduced into the gas-liquid separation chamber formed integrally with the cylinder head cover, and after the oil is separated there, it is extracted to the blow-by gas processing section.
It is necessary to reduce the height of the lubricating oil droplets against the valve mechanism in the cylinder head cover from entering the gas-liquid separation chamber together with the blow-by gas. Therefore, the prior art proposed blocking the lubricating oil droplets from entering the gas-liquid separation chamber by covering the blow-by gas inlet to the gas-liquid separation chamber with a cover having an L-shaped cross section. ing.

However, providing a cover at the inlet of the blow-by gas to the gas-liquid separation chamber in this way complicates the structure and is disadvantageous in terms of space, as the cover gets in the way of the valve mechanism. Moreover, this cover has the disadvantage that the installation position of the gas-liquid separation chamber is limited.

The present invention has a gas-liquid separation chamber integrally formed in the cylinder head cover as described above.
The above-mentioned drawbacks are solved by using reinforcing ribs for the cylinder head cover to prevent lubricating oil droplets from flowing into the gas-liquid separation chamber.

The following describes the drawings of the embodiment of the present invention. In the drawings, 1 is a cylinder head, and 2 is fastened to the upper surface of the cylinder head 1 with a plurality of bolts 3 so as to cover a valve mechanism (not shown). The cylinder head covers 2 each have a rectangular shape in which one side wall 4 in the longitudinal direction is formed in a straight line and the other side wall 5 is formed in a wave shape in a plan view, and an oil filter 7 is provided on the ceiling plate 6. It is provided.

Reference numeral 8 denotes a box having a substantially rectangular planar shape integrally formed with the cylinder head cover 2;
is a bottom open type, and a bottom plate 9 is attached to the bottom open part to close the open part to form a gas-liquid separation chamber 10 inside the box 8. A blow-by gas outlet passage 11 is provided to a blow-by gas processing section such as an intake system. Then, on the inner surface of the cylinder head cover 2, two reinforcing ribs 12, 12 are provided at an appropriate distance between the box 8 and the one side wall 4 in the longitudinal direction. A blow-by gas inlet passage 13 is formed between the two reinforcing ribs 12, 12 and communicates with the inside of the box 8. , an extension part 1 is formed by extending a part of the bottom plate 9 in the direction of the ribs 12, 12 so as to cover the entrance passage 13 between the reinforcing ribs.
4, and this extension part 14 is connected to both reinforcing ribs 1.
It is bent downward along the tips of 2 and 12.

The inside of the gas-liquid separation chamber 10 is provided with a plurality of baffle plates 15, 16, 17 to form a zigzag passage from the blow-by gas inlet passage 13 to the blow-by gas outlet passage 11, and the bottom plate 9 is provided with an oil outlet hole 18.

As described above, on the inner surface of the cylinder head cover 2, two reinforcing ribs 12, 12 are provided at an appropriate distance between the box 8 and one side wall 4 in the longitudinal direction of the cylinder head cover 2. The box 8 is integrally formed so as to extend in an inclined manner from the side surface of the box 8 to one side wall 4 of the cylinder head cover 2, and the portion between the reinforcing ribs 12, 12 is used as a blow-by gas inlet passage 13. On the other hand, a part of the bottom plate 9 is extended in the direction of the ribs 12, 12 so as to cover the entrance passage 13 between the reinforcing ribs, thereby forming an extension part 1.
4, and this extension part 14 is connected to both reinforcing ribs 1.
2 and 12, the blow-by gas in the cylinder head cover 2 flows from the inlet passage 13 between the reinforcing ribs 12 and 12 to the gas-liquid separation chamber 10 in the box 8. In other words, the blow-by gas flows into the gas-liquid separation chamber 10 from the portion of the cylinder head cover 2 adjacent to the one side wall 4,
12 and the extension part 14 of the bottom plate 9 act to prevent droplets of lubricating oil from being entrained in the blow-by gas to the gas-liquid separation chamber 10. There is no need to provide a cover at the blow-by gas inlet.

Therefore, according to the present invention, the reinforcing rib for the cylinder head cover can be used as a component of the gas-liquid separation device, and the structure can be significantly simplified. The extension portion is located within the cylinder head cover adjacent to one side wall of the cylinder head cover and does not interfere with the valve mechanism in any way.
This has the effect of allowing the installation position of the gas-liquid separation chamber to be set freely.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a plan view of the cylinder head cover, FIG. 2 is a bottom view of the cylinder head cover, FIG. 3 is a cross-sectional view taken from the side of FIG. 1, and FIG. FIG. 1 is a cross-sectional view taken from - in FIG. 1... Cylinder head, 2... Cylinder head cover, 4... One side wall, 8... Box, 9...
Bottom plate, 10... Gas-liquid separation chamber, 11... Blow-by gas outlet passage, 12... Reinforcing rib, 13... Blow-by gas inlet passage, 14... Extension part.

Claims (1)

[Scope of utility model registration request] A box with an open bottom is integrally molded on the cylinder head cover that covers the valve mechanism on the top of the cylinder head, and a bottom plate is attached to the open bottom of the box to close the open part, allowing air and liquid to flow inside the box. In a blow-by gas gas-liquid separation device formed in a separation chamber, and in which the box is provided with a blow-by gas outlet to a blow-by gas processing section, the inner surface of the cylinder head cover is provided with two reinforcing sheets spaced apart appropriately. A reinforcing rib is integrally formed so as to extend in an inclined manner from the side surface of the box to the side wall of the cylinder head cover, and a portion between the two reinforcing ribs communicates with the interior of the box, while a part of the bottom plate is The blow-by gas in an internal combustion engine is extended in the direction of the ribs so as to cover the part between the reinforcing ribs, and the extended portion is bent downward along the tips of the reinforcing ribs. Gas-liquid separation equipment.