JP2012197710A - Breather device of engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the breather device of an engine that can suppress separated oil from returning into mist again by a blow-by gas.SOLUTION: The breather device of an engine is configured in such a manner that: a blow-by gas 12 advancing from the entrance 5 to the exit 6 of a breather chamber 4 is guided by a suspended wall 7, a vertical wall 9 and a horizontal wall 10, to meander while horizontally reversing through a gap along the horizontal wall 10; the upper end of the vertical wall 9 is separated from the ceiling wall 3 of the breather chamber 4, forming a gap along the ceiling wall 3 between the upper end of the vertical wall 9 and the ceiling wall 3 of the breather chamber 4; and the blow-by gas 12 is guided by the vertical wall 9, the ceiling wall 3 and the suspended wall 7 to vertically reverse via the gap along the ceiling wall 3. In the device, the lower end of the suspended wall 7 is butted against the bottom wall 8 of the breather chamber 4.

Description

  The present invention relates to an engine breather device, and more particularly to an engine breather device capable of suppressing separation oil from being re-misted by blow-by gas.

  Conventionally, as a breather device for an engine, a cylinder head cover is assembled to a cylinder head, a breather chamber is provided along the top wall of the cylinder head cover, an inlet of the breather chamber is provided at one end in the longitudinal direction of the breather chamber, and a breather is provided at the other end. An outlet of the chamber is provided, and a vertical wall is projected downward from the top wall of the breather chamber. A plurality of vertical walls are arranged in the longitudinal direction so as to intersect the longitudinal direction of the breather chamber, and the vertical wall extends from the bottom wall of the breather chamber. A plurality of vertical walls are arranged in the longitudinal direction in a posture intersecting with the longitudinal direction of the breather chamber, and the vertical walls and the vertical walls are alternately arranged in the longitudinal direction of the breather chamber, in the longitudinal direction of the breather chamber. A gap along the horizontal wall is formed between the horizontal wall of the breather chamber and the horizontal end of the vertical wall, and blow-by gas from the inlet to the outlet of the breather chamber is connected to the vertical wall, the vertical wall, and the horizontal wall. The guide is made to meander while being reversed horizontally through a gap along the horizontal wall, and the upper end of the standing wall is separated from the top wall of the breather room, and the ceiling wall is located between the upper end of the standing wall and the top wall of the breather room. There is a structure in which a gap along the wall is formed, and blow-by gas is inverted in a vertical direction through the gap along the ceiling wall by guiding the standing wall, the ceiling wall, and the vertical wall (see, for example, Patent Document 1). ).

According to this type of breather device, blow-by gas containing oil mist collides with the side wall and ceiling wall of the breather chamber during reversal, and oil mist aggregates at the side wall and ceiling wall to separate oil from blow-by gas. There are advantages to being.
However, in this prior art, the lower end of the vertical wall is separated from the bottom wall of the breather chamber, a gap is formed along the bottom wall between the lower end of the vertical wall and the bottom wall of the breather chamber, and blow-by gas is generated. There is a problem because the vertical wall, the bottom wall, and the standing wall are guided by the vertical wall through the gap along the bottom wall.

JP-A-2005-337123 (see FIGS. 1 and 2)

<< Problem >> The separated oil may be re-misted by blow-by gas.
The blow-by gas is turned upside down through the gap along the bottom wall with the guide of the vertical wall, the bottom wall, and the standing wall, so that the separated oil collected on the bottom wall is lifted by this blow-by gas, There is a risk of mist formation.

  The subject of this invention is providing the breather apparatus of the engine which can suppress that separated oil re-mists with blow-by gas.

Invention specific matters of the invention according to claim 1 are as follows.
2A and 2B, a cylinder head cover (2) is assembled to the cylinder head (1), and a breather chamber (4) is provided along the top wall (3) of the cylinder head cover (2). The inlet (5) of the breather chamber (4) is provided at one end in the longitudinal direction of the breather chamber (4), the outlet (6) of the breather chamber (4) is provided at the other end, and the top wall of the breather chamber (4) The vertical wall (7) is projected downward from (3), and the vertical wall (7) is arranged in the longitudinal direction so as to intersect with the longitudinal direction of the breather chamber (4). A standing wall (9) is projected upward from the bottom wall (8), and a plurality of the standing walls (9) are arranged in the longitudinal direction so as to intersect the longitudinal direction of the breather chamber (4).
As illustrated in FIGS. 2 (A) and 2 (B), the vertical wall (7) and the standing wall (9) are alternately arranged in the longitudinal direction of the breather chamber (4), and the breather along the longitudinal direction of the breather chamber (4). A gap (11) along the lateral wall (10) is formed between the lateral wall (10) of the chamber (4) and the lateral end of the vertical wall (7), and the exit from the inlet (5) of the breather chamber (4). While the blow-by gas (12) heading for (6) is reversed sideways through the gap (11) along the horizontal wall (10) by the guide of the vertical wall (7), the standing wall (9) and the horizontal wall (10) While meandering, the upper end of the standing wall (9) is separated from the top wall (3) of the breather chamber (4), and between the upper end of the standing wall (9) and the top wall (3) of the breather chamber (4). The gap (13) along the ceiling wall (3) is formed, and the blow-by gas (12) is guided along the ceiling wall (3) by the guide between the standing wall (9), the ceiling wall and the hanging wall (7) ( 13), the engine is turned upside down. In Riesa apparatus,
As illustrated in FIG. 1B, a breather device for an engine, characterized in that the lower end portion (7a) of the vertical wall (7) is brought into contact with the bottom wall (8) of the breather chamber (4).

(Invention of Claim 1)
The invention according to claim 1 has the following effects.
<Effect> It is possible to suppress separation oil from being re-misted by blow-by gas.
As illustrated in FIG. 1B, since the lower end (7a) of the vertical wall (7) is brought into contact with the bottom wall (8) of the breather chamber (4), the bottom wall of the vertical wall (7) ( 8) There is no gap along the line, the separated oil collected on the bottom wall (8) by the blow-by gas (12) is not lifted, and the separated oil is prevented from being re-misted by the blow-by gas (12). it can

(Invention of Claim 2)
The invention according to claim 2 has the following effect in addition to the effect of the invention according to claim 1.
<Effect> The oil separation function of the breather chamber is high.
As illustrated in FIG. 1A, one lateral end of the vertical wall (7) is a connecting portion (14) connected to one lateral wall (10) of the breather chamber (4) without any gap, and the other lateral end is A gap (11) along the lateral wall (10) is provided only at the end, and the gap (11) along the lateral wall (10) is arranged along the opposite lateral wall (10) in the adjacent vertical wall (7). As a result, the short circuit to the downstream side of the blow-by gas (12) reversed sideways through the gap (11) along the lateral wall (10) is prevented by the connecting portion (14), and the breather chamber (4) Oil separation function is high.

(Invention of Claim 3)
The invention according to claim 3 has the following effect in addition to the effect of the invention according to claim 1 or claim 2.
<Effect> The oil separation function of the breather chamber is enhanced.
As illustrated in FIGS. 1 (A) and 1 (B), the oil absorbing material (15) is provided on the bottom wall (8) of the breather chamber (4) between the vertical wall (7) and the standing wall (9). The oil mist contained in the blow-by gas (12) is separated by the collision with the lateral wall (10) and the ceiling wall (3) of the breather chamber (4), and is also absorbed by the oil absorbing material (15). The oil separation function of (4) is enhanced.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining the principal part of the breather apparatus of the engine which concerns on embodiment of this invention, FIG. 1 (A) is a principal part expanded transverse plan view, FIG.1 (B) is a BB sectional view of FIG. FIG. FIG. 2A is a cross-sectional plan view and FIG. 2B is a cross-sectional view taken along line BB of FIG. 2A.

  1 to 2 are views for explaining an engine breather apparatus according to an embodiment of the present invention. In this embodiment, a breather apparatus for a vertical multi-cylinder diesel engine will be described.

  As shown in FIGS. 2 (A) and 2 (B), the cylinder head cover (2) is assembled to the cylinder head (1), and a breather chamber (4) is provided along the top wall (3) of the cylinder head cover (2). The inlet (5) of the breather chamber (4) is provided at one end in the longitudinal direction of the chamber (4), the outlet (6) of the breather chamber (4) is provided at the other end, and the top wall of the breather chamber (4) ( 3) The hanging wall (7) is projected downward from this, and the hanging wall (7) is arranged in the longitudinal direction so as to intersect with the longitudinal direction of the breather chamber (4), and the bottom of the breather chamber (4) is arranged. A standing wall (9) is projected upward from the wall (8), and a plurality of the standing walls (9) are arranged in the longitudinal direction so as to intersect with the longitudinal direction of the breather chamber (4).

  As shown in FIGS. 2 (A) and 2 (B), the breather chamber (4) has a left-right symmetrical shape and is provided with a pair of left and right. One breather chamber (4) is connected to the cylinder head cover (2) from one end side of the cylinder head cover (2). 2), the other breather chamber (4) is formed from the other end of the cylinder head cover (2) to the center of the cylinder head cover (2), and the outlets (6 ).

  As shown in FIGS. 1 (A) and 1 (B), the vertical wall (7) and the standing wall (9) are alternately arranged in the longitudinal direction of the breather chamber (4), and the breather chamber along the longitudinal direction of the breather chamber (4). A gap (11) along the horizontal wall (10) is formed between the horizontal wall (10) of (4) and the horizontal end of the vertical wall (7), and the outlet (5) from the inlet (5) of the breather chamber (4) ( 6) Blow-by gas (12) heading toward 6) is meandered while being turned sideways through a gap (11) along the lateral wall (10) by the guide of the vertical wall (7), the standing wall (9) and the lateral wall (10). And the upper end of the standing wall (9) is separated from the top wall (3) of the breather chamber (4), and between the upper end of the standing wall (9) and the top wall (3) of the breather chamber (4), A gap (13) along the ceiling wall (3) is formed, and the blow-by gas (12) is guided along the ceiling wall (3) by guiding the standing wall (9), the ceiling wall, and the hanging wall (7). ) To reverse in a vertical direction.

As shown in FIG. 1 (B), the lower end (7a) of the vertical wall (7) is brought into contact with the bottom wall (8) of the breather chamber (4).
As shown in FIG. 1 (A), one lateral end of the vertical wall (7) is a connecting portion (14) connected to one lateral wall (10) of the breather chamber (4) without any gap, and the other lateral end. A gap (11) along the lateral wall (10) is provided only at the portion, and the gap (11) along the lateral wall (10) is arranged along the opposite lateral wall (10) in the adjacent vertical wall (7). I am doing so.

As shown in FIGS. 1 (A) and 1 (B), an oil absorbing material (15) is provided on the bottom wall (8) of the breather chamber (4) between the vertical wall (7) and the standing wall (9).
The oil absorbing material (15) is a flat plate made of felt, and is attached to the bottom plate (15). The bottom plate (15) to which the oil absorbing material (15) is attached is provided with an oil dropping hole (not shown), and the oil absorbing material (15) The oil absorbed by the oil drops from the oil drop hole.

(1) Cylinder head
(2) Cylinder head cover
(3) Top wall
(4) Breezer room
(5) Entrance
(6) Exit
(7) Hanging wall
(7a) Lower end
(8) Bottom wall
(9) Vertical wall
(10) Horizontal wall
(11) Gap along the side wall
(12) Blowby gas
(13) Clearance along the ceiling wall
(14) Connecting part
(15) Oil absorbing material

Claims (3)

A cylinder head cover (2) is assembled to the cylinder head (1), a breather chamber (4) is provided along the top wall (3) of the cylinder head cover (2), and a breather chamber is provided at one end in the longitudinal direction of the breather chamber (4). The inlet (5) of (4) is provided, the outlet (6) of the breather chamber (4) is provided at the other end, and the vertical wall (7) is projected downward from the top wall (3) of the breather chamber (4). The vertical wall (7) is arranged in the longitudinal direction so as to intersect the longitudinal direction of the breather chamber (4), and the vertical wall (9) protrudes upward from the bottom wall (8) of the breather chamber (4). A plurality of the standing walls (9) are arranged in the longitudinal direction so as to intersect with the longitudinal direction of the breather chamber (4).
The vertical wall (7) and the vertical wall (9) are alternately arranged in the longitudinal direction of the breather chamber (4), and the lateral wall (10) and the vertical wall (7) of the breather chamber (4) along the longitudinal direction of the breather chamber (4). ) Along the lateral wall (10), and a blow-by gas (12) from the inlet (5) to the outlet (6) of the breather chamber (4) (7), the standing wall (9), and the side wall (10) are guided by the gap (11) along the side wall (10) while being meandered while being turned sideways, and the upper end of the standing wall (9) is breather chamber. A space (13) is formed along the ceiling wall (3) between the upper end of the standing wall (9) and the top wall (3) of the breather chamber (4), separated from the top wall (3) of (4). The blow-by gas (12) is inverted in the upright direction through the gap (13) along the ceiling wall (3) by the guide of the standing wall (9), the ceiling wall, and the hanging wall (7). In the breather device of the engine,
A breather device for an engine, characterized in that the lower end (7a) of the vertical wall (7) is brought into contact with the bottom wall (8) of the breather chamber (4). The breather apparatus for an engine according to claim 1,
One lateral end of the vertical wall (7) is a connecting part (14) connected to one lateral wall (10) of the breather chamber (4) without any gaps,
A gap (11) along the lateral wall (10) is provided only at the other lateral end,
A breather device for an engine, characterized in that the gap (11) along the horizontal wall (10) is arranged along the opposite horizontal wall (10) in the adjacent vertical wall (7). The breather apparatus for an engine according to claim 1 or 2,
A breather device for an engine, characterized in that an oil absorbing material (15) is provided on the bottom wall (8) of the breather chamber (4) between the vertical wall (7) and the standing wall (9).

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