JP2518670Y2 - Structure of Air Cleaner in Internal Combustion Engine - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cleaner for an internal combustion engine in which both the clean side case and the dust side case are made of synthetic resin.

[0002]

2. Description of the Related Art In recent internal combustion engines, blow-by gas in the cylinder head cover of the internal combustion engine is introduced into the air cleaner for the internal combustion engine. In this case, it is included in the blow-by gas. Since the oil content that adheres to the filter element,
A situation occurs where the filter element is contaminated.

[0003] Therefore, as a prior art, the utility model Sho 62-1.
No. 692111 discloses that a partition plate for partitioning an opening of a blow-by gas passage into the air cleaner and a filter element is provided in the air cleaner, and a sponge or the like is provided for the opening of the blow-by gas passage. It is proposed that the porous body is loaded and an oil discharge port is provided at the bottom of the portion surrounded by the partition plate.

[0004]

However, the structure of this prior art has a problem that the number of parts is increased and the manufacturing cost is significantly increased. Moreover, the case of the air cleaner is made of synthetic resin. There is a problem that it cannot be applied in the case of injection molding.

According to the present invention, when the case of the air cleaner is made of synthetic resin, it is possible to prevent the filter element from being contaminated by the blow-by gas introduced into the air cleaner. The technical problem is to reduce the membrane vibration of the case.

[0006]

In order to achieve this technical object, the present invention provides a dust side case and a clean side case, which are detachably joined to each other, made of synthetic resin, with a filter element interposed therebetween. Insert, while connecting the atmospheric air introduction duct to the dust side case,
In an air cleaner having an air outlet to an internal combustion engine provided in a portion of the clean side case away from the atmospheric air introduction duct, a blow-by gas passage from the internal combustion engine is connected to a blow-by gas inlet provided in the clean side case. On the other hand, on the inner bottom surface of the clean side case, two ribs extending from the left and right sides of the blow-by gas inlet toward the air outlet are integrally formed, and a mass is formed between the upper ends of the vertical ribs. The plate-shaped member that constitutes the damper is mounted so as to form a tunnel-shaped blow-by gas guide passage between the both ribs.

[0007]

In this structure, the atmospheric air flowing from the atmospheric air introducing duct into the dust side case of the air cleaner passes through the filter element into the clean side case, and is then sucked into the internal combustion engine from the air outlet thereof. . On the other hand, the blow-by gas from the blow-by gas passage is introduced into the clean side case through a blow-by gas guide passage formed by both vertical ribs and a plate-like member. By extending toward the air outlet from the clean side case, the blow-by gas introduced into the clean side case from this blow-by gas guide passage is
Since the air can be mixed with the main flow of air flowing from the inside of the clean side case toward the air outlet, it is possible to ensure that the blow-by gas is contaminated with the filter element because it is introduced into the clean side case. It can be reduced.

In this case, the blow-by gas guide passage for guiding the blow-by gas toward the air outlet from the clean side case is integrally formed on the inner bottom surface of the clean side case, and two ribs are integrally formed. Since the ribs are formed by the plate-shaped member mounted between the upper ends of the ribs, it is only necessary to form two vertical ribs on the inner bottom surface of the clean side case. However, the blow-by gas guide passage for reducing the contamination of the filter element can be formed in the clean side case.

On the other hand, when the intake pulsation is transmitted to the inside of the clean side case of the air cleaner, the bottom plate of the clean side case vibrates as a film. Since the member acts as a mass damper, the membrane vibration of the bottom plate in the clean side case can be reliably reduced by the mass damper action of the plate-shaped member.

[0010]

Therefore, according to the present invention, it is possible to provide an air cleaner made of synthetic resin in a form that can reliably reduce the contamination of the filter element due to blow-by gas and the membrane vibration of the clean side case. It has the effect that

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In the figure, reference numeral 1 indicates a vehicle body frame of an automobile, and an internal combustion engine 3 having a plurality of cylinders has a crank axis 4 in the internal combustion engine 3 in an engine room 2 formed in a front portion of the vehicle body frame 1. The radiator 5 is mounted sideways so as to be substantially perpendicular to the traveling direction of the automobile in a plan view, and a radiator 5 is arranged in front of the internal combustion engine 3.

Reference numeral 6 denotes an inertial supercharging type intake manifold mounted on one side surface in the longitudinal direction of the internal combustion engine 3. The intake manifold 6 includes a chamber 7 extending in the direction of the cylinder row of the internal combustion engine, and A plurality of branch intake pipe lines 8 are separately connected between the chamber 7 and each cylinder for each cylinder, and a throttle body 9 having a built-in throttle valve is provided in an integral part of the chamber 7.
Is installed.

Reference numeral 10 indicates an air cleaner disposed above the internal combustion engine 3, and the air cleaner 10 includes a synthetic resin clean side case 10a on the lower side and a synthetic resin dust side case 10b on the upper side in a substantially horizontal plane. And a filter element 10c interposed between them and the cases 10a and 10b are detachably joined to each other. The dust side case 10b
Is connected to the atmospheric air introduction duct 12 from the atmospheric air intake port 11, while the side of the clean side case 10a is located inside the clean side case 10a at a position away from the atmospheric air introduction duct 12. To the auxiliary chamber 15 communicating with the
The throttle body 9 is connected to the auxiliary chamber 15 provided so as to project toward the throttle body 9.

The air cleaner 10 has a plurality of support pieces 10d integrally projected from the clean side case 10a, and a grommet made of a soft elastic material such as rubber for the upper surface of the head cover 3a of the internal combustion engine 3. It is supported by the internal combustion engine 3 by being fastened with bolts 14 via 13. The blow-by gas passage 17 from the head cover 3a or the like of the internal combustion engine 3 is connected to the blow-by gas inlet 18 provided in the clean side case 10a of the air cleaner 10, while the inner bottom surface of the clean side case 10a is The ribs 19 and 20 of the book are integrally formed so as to extend from both sides of the blow-by gas inlet 18 toward the air outlet 16, and the ends of the ribs 19 and 20 are made of carbon steel or the like. A plate-shaped member 21 made of a material having a heavier mass than synthetic resin is mounted so as to form a tunnel-shaped blow-by gas guide passage 22 between the ribs 19 and 20.

The plate-like member 21 is provided with the ribs 19,
When mounting on the plate 20, the plate-like member 21 is inserted between the ribs 19 and 20, and then the ribs 19 and 2 are inserted.
The tip portion of 0 may be partially melted by the high-frequency horn 22 to be caulked and deformed (the indentation of this caulking deformation is indicated by reference numeral 23).
Other means, such as screwing to both ribs 19 and 20, may be applied.

In this structure, the atmospheric air intake port 1
Atmospheric air from No. 1 flows into the dust side case 10b of the air cleaner 10 through the atmospheric air introduction duct 12, passes through the filter element 10c from the inside of the dust side case 10b, and passes through the clean side case 1
After entering the inside of 0a, it is sucked into the throttle body 9 from the air outlet 16 through the auxiliary chamber 15. On the other hand, the blow-by gas from the blow-by gas passage 17 is
Both vertical ribs 19, in the clean side case 10a,
20 is introduced through a blow-by gas guide passage 22 formed of the plate-shaped member 20 and the plate-like member 21. The blow-by gas guide passage 22 extends from the clean side case 10a toward the air outlet 16 to the auxiliary chamber 15. By doing so, the blow-by gas introduced into the clean side case 10a through the blow-by gas guide passage 22 can be mixed with the main flow of air flowing from the clean side case 10a toward the air outlet 16. Therefore, since the blow-by gas is introduced into the clean side case 10a, it is possible to reliably reduce the contamination of the filter element 10c.

In this case, the two blow-by gas guide passages 22 for guiding the blow-by gas toward the air outlet 16 from the clean side case 10a are integrally formed on the inner bottom surface of the clean side case 10a. By forming by 19 and 20, and the plate-shaped member 21 mounted between the upper ends of both ribs 19 and 20,
Since the two ribs 19 and 20 only have to be formed on the inner bottom surface of the clean side case 10a, the clean side case 10a can be manufactured by injection molding of synthetic resin. In the side case 10a, the blow-by gas guide passage 22 for reducing the contamination of the filter element 10c can be formed.

On the other hand, when the intake pulsation is transmitted into the clean side case 10a of the air cleaner 10, the bottom plate 10 of the clean side case 10a is transmitted.
Although a ′ causes membrane vibration, since the plate-shaped member 21 forming a part of the blow-by gas guide passage 22 is made of a material having a heavier specific gravity than synthetic resin, the plate-shaped member 21 is so-called. Since it acts as a mass damper, the membrane vibration of the bottom plate 10a 'in the clean side case 10a can be reduced by the mass damper action of the plate member 21.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along line II-II of FIG.

FIG. 3 is an enlarged sectional view taken along line III-III in FIG.

FIG. 4 is an enlarged sectional view taken along line IV-IV of FIG.

5 is a sectional view taken along line VV of FIG.

6 is a sectional view taken along line VI-VI of FIG.

[Explanation of symbols]

 1 Body Frame 3 Internal Combustion Engine 6 Intake Manifold 9 Throttle Body 10 Air Cleaner 10a Clean Side Case 10a 'Clean Side Case Bottom Plate 10b Dust Side Case 10c Filter Element 12 Atmospheric Air Inlet Duct 15 Auxiliary Chamber 16 Air Outlet 17 Blow-by Gas Passage 18 Blow-by Gas Inlet 19, 20 Rib 21 Plate member 22 Blow-by gas guide passage

Continuation of the front page (56) References JP-A-50-146710 (JP, A) Actually opened 58-181918 (JP, U) Actually opened 3-32112 (JP, U)

Claims (1)

(57) [Scope of utility model registration request] 1. A dust side case and a clean side case, which are detachably joined to each other, are made of synthetic resin, a filter element is inserted between them, and an atmospheric air introduction duct is connected to the dust side case. In an air cleaner having an air outlet to an internal combustion engine provided in a portion of the clean side case away from the atmospheric air introduction duct, a blow-by gas passage from the internal combustion engine is connected to a blow-by gas inlet provided in the clean side case. On the other hand, on the inner bottom surface of the clean side case, two ribs extending from the left and right sides of the blow-by gas inlet toward the air outlet are integrally formed, and a mass damper is provided between the upper ends of both ribs. The plate-shaped member forming the above is formed with a tunnel-shaped blow-by gas guide passage between the vertical ribs. Structure of an air cleaner in an internal combustion engine, characterized in that mounted to.