JP2003035223A - Intake device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intake device which is arranged compactly and integrally with an engine cover and easily assembled. SOLUTION: The intake device 1 of the present invention comprises the engine cover 2 having a connection port 20; a cool air intake duct 3 connected to the connection port 20; an intake passage part 4 comprising an intake duct 40 which uses a backside of the engine cover 2 as a part of an inner wall and is connected to the connection port 20 and a resonator 41 disposed to cover the intake duct 40 by using the backside of the engine cover 2 as a part of an inner wall; an air cleaner part 5 having an air cleaner case 50 which disposed to use the backside of the engine cover 2 as a part of an inner wall and is removably attached to the engine cover 2, and an air element 51 for partitioning an inside of the air cleaner case 50 into a dirty side and a clean side; and a connection pipe 6 for connecting the clean side of the air cleaner case 50 and a throttle body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake device, and more particularly, to an intake device that is arranged integrally with an engine cover of an automobile or the like.

[0002]

2. Description of the Related Art An intake device is a device for sucking air supplied to a combustion chamber of an engine. FIG. 9 shows an exploded view of a conventional intake device. As shown in the figure, the conventional intake device 10
0 is the engine cover 200 in the engine room
It is located in front of. The intake device 100 includes an intake duct 101, an air cleaner portion 102, and a resonator 10.
3 and an air cleaner hose 104.

The air cleaner section 102 comprises an upper case 105, a lower case 106, and an air element 107. The upper case 105 has a box shape that opens downward. An air flow meter (not shown) is attached to the upper case 105. Also lower case 1
06 has a box shape that opens upward. The air element 107 is sandwiched between the lower opening of the upper case 105 and the upper opening of the lower case 106. A cylindrical intake duct 101 is connected to the lower case 106. The upper case 105 also has a hose clamp 1
08, the upstream connection end of the air cleaner hose 104 is fastened and fixed. A downstream connection end of the air cleaner hose 104 is fastened and fixed to a throttle body (not shown) by a hose clamp 109.

The air taken in from the intake duct 101 is
It flows into the lower case 106 of the air cleaner portion 102. The air that has flowed into the lower case 106 passes through the air element 107 to be cleaned by removing dust and dirt. The purified air flows into the air cleaner hose 104 through the upper case 105.
The air flowing into the air cleaner hose 104 then flows into the throttle body and is supplied to the combustion chamber of the engine. The intake noise is reduced by the resonator 103 or the like attached to the air cleaner hose 104.

[0005]

However, the conventional intake system 100 is assembled in the engine room as a separate body from the engine cover 200. Therefore, it is necessary to secure a space for assembling the intake device 100 in the engine room separately from the engine cover 200. Further, in the conventional intake device 100, members such as hose clamps 108 and 109, which are not directly related to the intake of air, are provided. Therefore, the number of parts is large and the assembling property is poor.

The intake system of the present invention has been completed in view of the above problems. Therefore, an object of the present invention is to provide an intake device that is compactly arranged integrally with an engine cover, is easy to assemble, and has a small number of parts.

[0007]

(1) In order to solve the above problems, an intake device of the present invention is provided with an engine cover having a connection port, and cool air arranged on the surface side of the engine cover and connected to the connection port. The intake duct and the split-body-shaped intake duct that is connected to the connection port with the back surface of the engine cover as a part of the inner wall and the split-body-shaped resonator that is placed around the intake duct with the back surface of the engine cover as a part of the inner wall And an air passage case consisting of a split air conditioner case which is connected to the intake duct with the back surface of the engine cover as a part of the inner wall and is detachably attached to the engine cover, and a dirty case where the inside of the air cleaner case is connected to the intake duct. Between the clean side of the air cleaner case and the throttle body. A connecting pipe for connecting, that consists characterized.

That is, the intake system of the present invention has the engine cover as a part of its constituent parts. Then, it is assembled integrally with the engine cover. According to the intake device of the present invention, it is not necessary to secure a space for separately assembling the intake device in the engine room independently of the engine cover. Therefore, it has excellent space characteristics.
Most of the components of the intake system of the present invention are arranged on the back surface of the engine cover. Therefore, the intake device hardly appears in the engine room. Therefore, it is also excellent in design. Further, the resonator of the intake device of the present invention is integrally arranged so as to surround the intake duct.
The resonator is in communication with the intake duct through the pores that penetrate the side wall of the intake duct. Therefore, compared to the case where the resonator is arranged separately from the intake duct, there is no need to provide a branch passage that connects both members, and the device is compact. Therefore, the space is excellent and the structure is simple. By the way, the intake passage and the air cleaner are
It is a member that requires a relatively large volume. In the intake device of the present invention, both of these members utilize the back surface of the engine cover as a part of the inner wall of the member. In other words, they are juxtaposed on the back of the engine cover. Therefore, the vertical thickness of the intake device of the present invention is thin. Therefore, a sufficient engine installation space can be secured below the intake device of the present invention.

(2) Preferably, a negative pressure opening / closing valve having a mechanical valve mechanism which is connected to the air cleaner case independently of the intake duct and is opened / closed by a negative pressure generated in a dirty volume of the air cleaner case. It is better to have the configuration.

That is, in this structure, a negative pressure opening / closing valve having a mechanical valve mechanism is arranged on the dirty side of the air cleaner case, that is, on the upstream side of the air element, in addition to the intake duct. By arranging the negative pressure open / close type valve, the desired air amount in the combustion chamber suddenly increases, and even if the amount of air from the intake duct is not sufficient, a sufficient amount of air is supplied to the combustion chamber. be able to. Further, since this negative pressure opening / closing valve is arranged integrally with the air cleaner case, in other words, it is arranged integrally with the engine cover, the present configuration is excellent in space.

(3) Preferably, the cool air intake duct has an engaging projection on the inner peripheral surface of the connecting end, and the connecting port has an L-shaped engagement extending axially on the outer peripheral surface and bending in the circumferential direction. It is better to have a groove, and the cool air intake duct is connected to the connection port by inserting the engagement protrusion into the engagement groove and rotating the engagement protrusion.

That is, in this structure, an L-shaped engaging groove extending in the axial direction of the connection port from the opening end and bent in the circumferential direction is arranged on the outer peripheral surface of the connection port, and the inner periphery of the connection end of the cool air intake duct is arranged. An engaging protrusion that engages with the engaging groove is arranged on the surface. According to this configuration, the cool air intake duct can be attached to the connection port only by inserting the connection port into the inner peripheral side of the connection end of the cool air intake duct and rotating the connection port by a predetermined amount in the circumferential direction. That is, a fastener such as a hose clamp is not required to attach the cool air intake duct. Therefore, this structure has a small number of parts and is excellent in assembling.

(4) Further, it is preferable that the cool air intake duct is provided with a ventilation member for emitting a transmitted sound at a level equivalent to the intake noise on the pipe wall.

That is, in this structure, a ventilation member capable of radiating a transmitted sound at a level equivalent to the noise due to the air sucked in from the upstream end is arranged on the pipe wall of the cool air intake duct. According to this configuration, intake noise can be further reduced.

(5) It is preferable that the resonator is provided with a bush that suppresses transmission of vibration from the adjacent engine.

Below the resonator, for example, the cylinder head of the engine is arranged adjacently. Therefore, in this structure, a bush for suppressing vibration transmission from the cylinder head is mounted on the lower surface of the resonator. By mounting the bush, it is possible to prevent the vibration from the cylinder head from being transmitted to the intake device. More preferably, it is preferable that the bush has a ring shape and a pin that is press-fitted to the inner peripheral side of the bush is provided on the upper surface of the cylinder head. With this configuration, the resonator, and thus the intake device, can be fixed to the cylinder head while suppressing vibration.

(6) Further, it is preferable that the connecting pipe is configured such that the connecting end to the air cleaner case projects toward the inner surface of the air cleaner case.

That is, in this structure, the upstream connecting end of the connecting pipe is arranged so as to project inside the air cleaner case downstream (clean side). According to this configuration, it is possible to suppress the noise generated by the air passing through the air element vibrating the connection pipe setting wall surface on the inner surface of the air cleaner case. It is more preferable that the protruding portion of the connecting pipe has an appropriate funnel shape so as not to have ventilation resistance.

(7) Further, preferably, an elastic seal into which the connecting end of the throttle body is press-fitted is attached to the connecting end of the connecting pipe with the throttle body.

That is, in this structure, a fitting seal having elasticity is attached to the downstream connecting end of the connecting pipe. The upstream connecting end of the throttle body is press-fitted into the inner peripheral side of this elastic seal. According to this configuration, the connecting pipe and the throttle body can be easily connected without using, for example, a hose clamp. Therefore, this structure has a small number of parts and is excellent in assembling.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an intake device of the present invention will be described below. FIG. 1 shows an exploded view of the intake device of this embodiment. As shown in the figure, the intake device 1 of the present embodiment includes an engine cover 2, a cool air intake duct 3, an intake passage portion 4, a negative pressure opening / closing valve 7, an air cleaner portion 5, and a connecting pipe 6.

The engine cover 2 is made of PP resin and has a dish shape that opens downward. A connection port 20 penetrating to the back side is arranged on the front surface of the engine cover 2. Two L-shaped engagement grooves (not shown) are formed on the outer peripheral surface of the connection port 20 every half circumference.

The cool air intake duct 3 is connected to the connection port 20. The cool air intake duct 3 has a tubular shape. As shown in FIG. 2, the cool air intake duct 3 includes the engaging projection 30 and the PET.
And a ventilation member 31 made of a non-woven fabric. Of these, the engagement protrusion 30 is inserted into the engagement groove 24 of the connection port 20 of the engine cover 2 and is rotated, as indicated by the alternate long and short dash line in the figure. In this way, the cool air intake duct 3 is connected to the engine cover 2.

The ventilation member 31 has a rectangular plate shape. The ventilation member 31 is arranged so as to fill a rectangular window frame 32 formed on the side wall of the cool air intake duct 3. Therefore, the ventilation member 31 forms a part of the side wall of the cool air intake duct 3. By setting the ventilation member 31, it is possible to radiate the transmitted sound at a level equivalent to the intake sound. Therefore, intake noise can be effectively reduced.

On the other hand, as shown in FIG.
As shown in, the intake passage portion 4 and the air cleaner portion 5 are arranged in parallel. Of these, the intake passage portion 4 is the same as the intake duct 40 made of PP resin and the resonator 4 made of PP resin.
It consists of 1. The upstream connection end of the intake duct 40 is connected to the connection port 20 from the back surface side of the engine cover 2. The intake duct 40 has a split body shape obtained by splitting a pipe in the axial direction. That is, the axial cross section of the intake duct 40 has a U-shape that opens toward the engine cover.
The intake duct 40 is arranged on the back surface of the engine cover 2 with the U-shaped opening just turned down.
Specifically, as shown in FIG. 3, the axially open end 42 of the intake duct 40 is inserted between the parallel ribs 21 provided upright on the back surface of the engine cover 2. Therefore, it is possible to absorb the occurrence of a gap between the engine cover 2 and the intake duct 40 due to variations in molding, and to secure the required airtightness. The axially open end 42 is welded to the back surface of the engine cover 2 at several points by heat staking. In this way, the intake duct 40 is attached to the back surface of the engine cover 2. A large number of pores 43 are formed on the side wall of the intake duct 40 so as to be arranged in the axial direction. It is possible to tune the muffling characteristics of the resonator 41 by the diameter and the number of the pores 43, the volume of the resonator 41, and the like.

On the outer peripheral side of the side wall of the intake duct 40, a resonator 41 is arranged so as to surround the intake duct 40. The resonator 41 has a box shape that opens toward the engine cover. That is, the resonator 41 has a U-shaped cross section that opens toward the engine cover.
The resonator 41 is arranged on the back surface of the engine cover 2 with the U-shaped opening just turned down.
Specifically, as shown in FIG. 3, the axially open end 44 of the resonator 41 is inserted between the parallel ribs 22 provided upright on the back surface of the engine cover 2. Therefore, it is possible to absorb the generation of the gap between the engine cover 2 and the resonator 41 due to the variation in molding, and to secure the required airtightness. Further, the axially open end 44 is welded to the back surface of the engine cover 2 at several points by heat staking. In this way, the resonator 41 is mounted on the back surface of the engine cover 2. Further, the intake duct 40 and the resonator 41 are
The pores 43 communicate with each other. Therefore, the intake noise transmitted through the intake duct 40 is reduced by the resonator 41.

Further, as shown in FIG. 1, four rubber bushes 45 are attached to the lower surface of the resonator 41. The bush 45 has a ring shape, as shown in FIG. A pin 90 formed on the cylinder head 9 of the engine is press-fitted on the inner peripheral side of the bush 45. In this way, the resonator 41 is fixed to the surface of the cylinder head 9. The bush 45 fixes the resonator 41 to the cylinder head 9, and at the same time suppresses the vibration from the cylinder head 9 from being transmitted to the resonator 41.

The air cleaner portion 5 is, as shown in FIG.
It comprises an air cleaner case 50 made of PP resin and an air element 51 made of PET non-woven fabric. The downstream connection end of the intake duct 40 and the negative pressure open / close valve 7 are connected to the upstream side of the air cleaner case 50. Further, the upstream side of the air cleaner case 50 communicates with a PCV circuit passing through a combustion chamber of the engine,
A nipple 52 into which air containing oil flows is arranged. The air cleaner case 50 has a box shape that opens toward the engine cover. As shown in FIG. 5, the air cleaner case 50 is detachably fixed to a square-shaped frame 23 formed on the back surface of the engine cover 2 by a metal clamp (not shown). The reason why the air cleaner case 50 is clamped is to ensure the maintainability of the air element 51.
An air element 51 is sandwiched and fixed between the frame body 23 and the opening end of the air cleaner case 50, as shown in FIG. The air element 51 separates the inside of the air cleaner case 50 into a dirty side (upstream side) that communicates with the intake duct 40 and the negative pressure opening / closing valve 7 and a clean side (downstream side) that communicates with the throttle body. There is.

A connection pipe 6 made of PP resin is integrally formed on the clean side lower wall of the air cleaner case 50. As shown by the dotted line in FIG. 5, the upstream connecting end 60 of the connecting pipe 6 projects inward of the air cleaner case 50. The projecting connecting end 60 has a role of suppressing the generation of noise by fluttering the inner wall of the air cleaner case 50 on the clean side due to the intake air passing through the air element 51. As shown in FIG. 7, the downstream connecting end 61 of the connecting pipe 6 is connected to the throttle body 8. An elastic seal 62 made of rubber is attached to the connecting end 61. Two ring-shaped lip portions 63 are formed on the inner peripheral side of the elastic seal 62. With this lip portion 63, the sealing property with the throttle body 8 press-fitted into the connecting end 61 of the connecting pipe 6 can be secured.

The assembling of each member of the intake device 1 is mainly performed by press fitting or fitting. Therefore, the first embodiment
Has excellent workability. Moreover, since each member is assembled without using a fastener such as a hose clamp, the number of parts is small. FIG. 8 shows an external view of the intake device 1 of this embodiment. As shown in the figure, the intake device 1 is integrally arranged on the back surface side of the engine cover 2. Therefore, it is not necessary to separately secure a space for disposing the intake device in the engine room. Therefore, it has excellent space characteristics. Further, most of the components of the intake device 1 are not exposed in the engine room. Therefore, it is excellent in terms of design.

The embodiment of the intake device of the present invention has been described above. However, various modifications and applications that can be made by those skilled in the art can be implemented. For example, the resin forming each member of the intake device 1 may be a PA-based resin or the like instead of the PP-based resin. Further, the intake device 1 may be implemented in a form in which the negative pressure open / close valve 7 is not provided. The method for fixing the intake duct 40 and the resonator 41 to the engine cover 2 is not limited to heat staking, but may be ultrasonic welding or mechanical engagement such as claw fitting. The connecting pipe 6 may be separate from the air cleaner case 50.

[0032]

According to the present invention, it is possible to provide an intake device which is compactly arranged integrally with an engine cover, is easy to assemble, and has a small number of parts.

[Brief description of drawings]

FIG. 1 is an exploded view of an intake device of the present embodiment.

FIG. 2 is an enlarged view of a connection portion between a cool air intake duct and an engine cover.

FIG. 3 is a sectional view of an intake passage portion in a direction perpendicular to an axis.

FIG. 4 is an enlarged sectional view of a bush.

FIG. 5 is a perspective view of the intake device of the present embodiment as viewed from the back surface side.

FIG. 6 is a view in which an air cleaner case is removed from the intake device of the present embodiment.

FIG. 7 is an enlarged sectional view of a connecting portion between a connecting pipe and a throttle body.

FIG. 8 is a perspective view of the intake device of the present embodiment as viewed from the front side.

FIG. 9 is an exploded view of a conventional intake device.

[Explanation of symbols]

1: Intake device, 2: Engine cover, 20: Connection port, 2
1: parallel ribs, 22: parallel ribs, 23: frame body, 24: engaging groove, 3: cool air intake duct, 30: engaging convex portion, 31: ventilation member, 32: window frame, 4: intake passage portion Four
0: intake duct, 41: resonator, 42: axially open end, 43: pore, 44: axially open end, 45: bush, 5: air cleaner part, 50: air cleaner case, 51: air element, 6 : Connection pipe, 60: Connection end, 61: Connection end, 62: Elastic seal, 63: Lip part, 7: Negative pressure open / close type valve, 8: Throttle body,
9: Cylinder head, 90: Pin.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F02M 35/04 F02M 35/12 M 35/12 N 35/10 301F 301L (72) Inventor ▲ Taka ▼ ta Kou Aichi Prefecture, Kasuga-cho, Nishikasugai-gun 1 Ochiai, Nagahata Toyoda Gosei Co., Ltd. (72) Inventor Hiroshi Iwao 1 Kasuga-cho, Nishikasugai-gun, Ochiai, Nagachia 1 Hochigo Gosei Co., Ltd. (72) Inventor, Hiroyuki Mori Aichi 1 Kasuga-cho, Nishikasugai-gun, Ochiai, Nagahata, Toyoda Gosei Co., Ltd.

Claims (7)

[Claims] 1. An engine cover having a connection port, a cool air intake duct arranged on a front surface side of the engine cover and connected to the connection port, and a back surface of the engine cover as a part of an inner wall to the connection port. An intake passage portion formed by a split-body-shaped intake duct connected to the engine cover and a split-body-shaped resonator that is disposed so as to surround the intake duct with the back surface of the engine cover as a part of an inner wall, and the back surface of the engine cover as an inner wall. A split air cleaner case that is connected to the intake duct and is detachably attached to the engine cover, and an air element that partitions the inside of the air cleaner case into a dirty side and a clean side that are connected to the intake duct. An air cleaner part consisting of, and a connecting pipe connecting between the clean side of the air cleaner case and the throttle body,
Intake device consisting of. 2. A negative pressure opening / closing valve having a mechanical valve mechanism that is connected to the air cleaner case independently of the intake duct and that opens and closes by a negative pressure generated in a dirty volume of the air cleaner case. The intake device according to claim 1. 3. The cool air intake duct is provided with an engaging convex portion on an inner peripheral surface of a connecting end, and the connecting port is provided with an L-shaped engaging groove extending in an axial direction and bent in a circumferential direction on an outer peripheral surface. The intake device according to claim 1, wherein the cool air intake duct is connected to the connection port by inserting the engagement protrusion into the engagement groove and rotating the engagement protrusion. 4. The intake device according to claim 1, wherein the cool air intake duct includes a ventilation member that emits a transmitted sound at a level equivalent to the intake noise on a pipe wall. 5. The intake device according to claim 1, wherein the resonator includes a bush that suppresses transmission of vibration from an adjacent engine. 6. The air intake device according to claim 1, wherein the connecting pipe has a connection end that is connected to the air cleaner case and protrudes toward the inner surface of the air cleaner case. 7. The intake device according to claim 1, wherein an elastic seal into which the connection end of the throttle body is press-fitted is annularly attached to a connection end of the connection pipe with the throttle body.