JP4196190B2 - Air cleaner device for internal combustion engine - Google Patents

Description

  The present invention relates to an air cleaner device for an internal combustion engine, and more particularly to an air cleaner device for an internal combustion engine that recirculates blow-by gas in a breather chamber of a cylinder head cover into the air cleaner.

  In a vehicle, an air cleaner device is provided in order to introduce purified air into an internal combustion engine. In this air cleaner device, a cleaner chamber is formed by joining the dusty side case and the clean side case, and the cleaner chamber is separated from the air chamber and clean air by a filter element sandwiched between the joint surfaces of the dusty side case and the clean side case. Some have an air cleaner partitioned into a chamber and a gas-liquid separation chamber that is interposed in a blow-by gas introduction passage that introduces the blow-by gas into the clean side case and separates oil in the blow-by gas.

Some air cleaner devices that recirculate blow-by gas to the air cleaner lead the blow-by gas to the separation chamber through the vertical passage in the cylinder head cover and the through hole of the partition plate, and then send the blow-by gas to the intake manifold via the control valve.
Some air cleaner devices that recirculate blow-by gas to the air cleaner have a maze structure in the blow-by gas reduction passage in the air cleaner to remove oil in the blow-by gas.
Furthermore, there is an air cleaner device that recirculates blowby gas to an air cleaner, in which an air cleaner is directly attached to an upper portion of a cylinder head, and a maze gas-liquid separation chamber is formed in the air cleaner.
JP 2001-263036 A JP 2000-54923 A JP-A-9-112358

  By the way, in the past, an air cleaner device that recirculates blow-by gas to the air cleaner has a complicated structure in which a gas-liquid separation chamber is installed when the air cleaner is directly attached to the top of the cylinder head cover and the blow-by gas is recirculated into the air cleaner. Or the filter element is contaminated by the recirculating blow-by gas.

  According to the present invention, a cleaner chamber is formed by joining the dusty side case and the clean side case, and the cleaner chamber is cleaned from the air chamber by a filter element sandwiched between the joint surfaces of the dusty side case and the clean side case. In an air cleaner apparatus for an internal combustion engine, comprising: an air cleaner that is partitioned into an air chamber; and a gas-liquid separation chamber that is interposed in a blow-by gas introduction passage that introduces blow-by gas into the clean-side case and separates oil in the blow-by gas. The dusty case includes an air chamber recess for forming the air chamber and a gas-liquid separation chamber recess having a blow-by gas inlet to form the gas-liquid separation chamber. A lid with a through hole that closes the opening of the recess for the gas-liquid separation chamber and communicates with the clean air chamber is provided. Characterized in that was.

  An air cleaner device for an internal combustion engine of the present invention is provided with an air chamber recess for forming an air chamber and a gas-liquid separation chamber recess for forming a gas-liquid separation chamber with a blow-by gas inlet in the dusty side case, Since the filter element is provided with a lid portion that closes the opening of the recess for the gas-liquid separation chamber and has a through hole communicating with the clean air chamber, the gas-liquid separation chamber is formed integrally with the air cleaner with a simple structure. In addition, it is possible to prevent the filter element from being damaged by the refluxing blow-by gas.

This invention has a simple structure, and a gas-liquid separation chamber is formed integrally with an air cleaner, and the shape of the case of the air cleaner and a cover portion are provided on the filter element for the purpose of preventing the filter element from being damaged by the recirculating blow-by gas. This is what is achieved.
Hereinafter, embodiments of the present invention will be described in detail and specifically with reference to the drawings.

  1 to 7 show a first embodiment of the present invention. 4 and 7, 2 is an internal combustion engine with a supercharger mounted on a vehicle (not shown), 4 is a cylinder block, 6 is a cylinder head, and 8 is a cylinder head cover. In the internal combustion engine 2, a turbocharger (turbocharger) 10 is attached to the vehicle front side of the cylinder block 4, and an air cleaner device 12 is installed above the cylinder head cover 8.

  The air cleaner device 12 includes an air cleaner 16 that is located above the rear portion of the internal combustion engine 2 and forms a cleaner chamber 14, and a resonator 20 that is located above the front portion of the internal combustion engine 2 and forms a resonator chamber 18. It is configured integrally.

  Further, as shown in FIG. 1, a breather chamber 22 having a function of separating oil contained in blow-by gas is formed in the cylinder head cover 8. Blow-by gas generated in the internal combustion engine 2 flows into the breather chamber 22 from the lower cylinder block 4 side.

  An air inlet pipe 24 is connected to the air inlet pipe 26-1 on the right side of the air cleaner 16. One end of an air outlet hose 28-1 is connected to the right air outlet pipe 26-2 of the resonator 20. The other end side of the air outlet hose 28-1 is connected to one end side of the turbo inlet pipe 28-2. The other end side of the turbo inlet pipe 28-2 is connected to an inlet portion of a compressor (not shown) of the supercharger 10.

  One end of a turbo outlet pipe 30-1 is connected to the outlet of the compressor of the supercharger 10. The other end side of the turbo outlet pipe 30-1 is connected to one end side of the intercool line hose 30-2. The other end side of the intercooler line hose 30-2 is connected to the inlet portion on the front side of the intercooler 32. The intercooler 32 is provided on the left side of the internal combustion engine 2 and is provided with an intercooler duct 34 directed to the front side.

  An air bypass valve 36 is attached to the turbo inlet pipe 28-2. The air bypass valve 36 and the turbo outlet pipe 30-1 are connected with each other by an air bypass hose 38.

  One end of the intercooler outlet hose 40 is connected to the outlet portion on the rear side of the intercooler 32. The other end side of the intercooler outlet hose 40 is connected to the throttle body 42. The throttle body 42 is attached to the intake manifold 44. The intake manifold 44 is located behind and above the internal combustion engine 2 and has a surge tank 48 provided with a body mounting portion 46 for attaching the throttle body 42, and is connected to the surge tank 48 and directed downward. It consists of a branch pipe 52 that is bent forward and attached to the intake manifold attachment portion 50 on the rear side of the cylinder head 6. The body attachment portion 46 and the branch pipe 52 are connected by a reinforcing member 54.

  An exhaust manifold 58 is attached to the exhaust manifold attachment portion 56 on the front side of the cylinder head 6. A turbine (not shown) of the supercharger 10 is provided on the downstream side of the exhaust manifold 58.

  As shown in FIGS. 5 and 6, the air cleaner 16 forms the cleaner chamber 14 by joining the dusty side case 60 and the clean side case 62, and is formed on the joint surface between the dusty side case 60 and the clean side case 62. The cleaner chamber 14 defines an atmospheric chamber 66 and a clean air chamber 68 by the plate-like filter elements 64 sandwiched therebetween. In this case, an elastic member 70 that seals between the air chamber 66 and the clean air chamber 68 is attached to the outer peripheral surface 64 </ b> A of the filter element 64. The atmosphere chamber 66 communicates with the inside of the air inlet duct 24. The resonator chamber 18 communicates with the clean air chamber 68. The elastic member 70 is sandwiched and held between the flange holding portion 60F of the dusty side case 60 and the flange holding portion 62F of the clean side case 62.

  Further, as shown in FIGS. 5 and 6, a gas-liquid separation chamber 74 for separating oil in the blow-by gas is interposed in the blow-by gas introduction passage 72 for introducing the blow-by gas into the clean side case 62.

  That is, the dusty case 60 is provided with an air chamber recess 76 that forms the air chamber 66 and a gas-liquid separation chamber recess 80 that includes the blow-by gas inlet 78 and forms the gas-liquid separation chamber 74. Yes. The filter element 64 is provided with a lid portion 86 that closes the opening 82 of the gas-liquid separation chamber recess 80 and includes a through hole 84 that communicates with the clean air chamber 68. The lid portion 86 is formed by expanding the elastic member 70. A portion of the elastic member 70 on the through hole 84 side is sandwiched between end holding walls 60B and 60B that extend in the vertical direction of the dusty side case 60 and end holding walls 62B and 62B of the clean side case 62. Is retained.

  In addition, as shown in FIG. 3, a plurality of case-side ribs 88 are erected at a predetermined interval in the atmospheric chamber recess 76 of the dusty-side case 60 and elastically function as a lid portion 86. In the member 70, filter-side ribs 90 are erected at predetermined intervals so as to be inserted between the case-side ribs 88, thereby forming a labyrinth-like passage 92 inside the gas-liquid separation chamber 74. Is done.

  When the air cleaner 16 is mounted on the internal combustion engine 2, the gas-liquid separation chamber 74 is positioned on the upper surface of the cylinder head cover 8 of the internal combustion engine 2 and the atmospheric chamber 66 is offset from the upper surface of the cylinder head cover 8 as shown in FIG. Arranged.

  As shown in FIGS. 1 and 2, blow-by gas outlet holes 94 are formed in the upper surface portion 8 </ b> A of the cylinder head cover 8 at positions corresponding to the openings 82 of the gas-liquid separation chamber recess 80. In addition, a blow-by gas introduction pipe 98 fitted into the blow-by gas outlet hole 94 via a seal member 96 projects downward from the gas-liquid separation chamber 74 so as to communicate with the breather chamber 22 in the cylinder head cover 8. Is provided. The blow-by gas introduction pipe 98 is formed integrally with the dusty side case 60.

  Next, the operation of the first embodiment will be described.

  In the internal combustion engine 2, fresh air is guided to the air inlet pipe 24, the air cleaner 16, the resonator 20, the air outlet hose 28-1 and the turbo inlet pipe 28-2, and is supercharged by the compressor of the supercharger 10. Further, it is supplied through a turbo outlet pipe 30-1, an intercooler outlet hose 30-2, an intercooler 32, an intercooler outlet hose 40, a throttle body 42, and an intake manifold 44.

  On the other hand, blow-by gas generated in the internal combustion engine 2 reaches the labyrinth passage 92 from the breather chamber 22 of the cylinder head cover 8 through the blow-by gas introduction pipe 98 as shown in FIG. Then, the air is recirculated from the through hole 84 to the clean air chamber 68.

  As a result, the dusty case 60 is provided with an air chamber recess 76 that forms the air chamber 66 and a gas-liquid separation chamber recess 80 that includes the blow-by gas inlet 78 and forms the gas-liquid separation chamber 74. Since the element 64 is provided with a lid portion 86 that closes the opening 82 of the gas-liquid separation chamber recess 80 and includes the through hole 84 that communicates with the clean air chamber 68, a long pipe is not required, and a simple structure is provided. The gas-liquid separation chamber 74 can be formed integrally with the air cleaner 16, and the refluxing blowby gas does not flow to the filter element 64 on the atmosphere chamber 66 side, so that the filter element 64 can be prevented from being contaminated by the blowby gas. .

  In addition, a case-side rib 88 is erected in the atmospheric chamber recess 76, and a filter-side rib 90 inserted between the case-side ribs 88 is erected in the elastic member 70 functioning as the lid portion 86. Since the labyrinth-shaped passage 92 is formed inside the liquid separation chamber 74, the oil separation performance from blow-by gas can be improved.

  Further, the filter element 64 is provided with an elastic member 70 that seals between the atmosphere chamber 66 and the clean air chamber 68, and the lid portion 86 is formed by expanding the elastic member 70, that is, the filter element 64. By expanding the sealing elastic member 70 attached to the cover portion 82, the shape of the elastic member 66 can be simplified, and manufacturing can be facilitated.

  Furthermore, when the air cleaner 16 is mounted on the internal combustion engine 2, the gas-liquid separation chamber 74 is positioned on the upper surface of the cylinder head cover 8 of the internal combustion engine 2, and the atmospheric chamber 66 is disposed offset from the upper surface of the cylinder head cover 8. Therefore, the gas-liquid separation chamber 74 can be disposed on the upper surface of the cylinder head cover 8 in which the breather chamber 22 is formed, and the piping connecting the breather chamber 22 and the gas-liquid separation chamber 74 can be shortened. In addition, since the atmospheric chamber 66 having a depth larger than that of the gas-liquid separation chamber 74 is disposed offset from the upper surface of the cylinder head cover 8, the air cleaner device 12 can be disposed compactly on the upper surface of the cylinder head cover 8. it can.

  Further, a blow-by gas lead-out hole 94 is formed on the upper surface of the cylinder head cover 8, and a blow-by gas introduction pipe 98 that is fitted into the blow-by gas lead-out hole 94 via a seal member 96 is provided in the gas-liquid separation chamber 74. Therefore, a blow-by gas introduction pipe 98 is provided on the gas-liquid separation chamber 74 side so that piping for connecting the breather chamber 22 and the gas-liquid separation chamber 74 formed in the cylinder head cover 8 is not necessary. Since the introduction pipe 98 is structured to be inserted into the cylinder head cover 8, the height of the air cleaner device 12 can be reduced, and the overall size can be reduced.

  FIG. 8 shows a special configuration of the present invention and shows a second embodiment.

  The feature of the second embodiment is that the bottom of the gas-liquid separation chamber recess 80 forming the labyrinth-shaped passage 92 is inclined toward the blow-by gas introduction port 78 side to the bottom of the gas-liquid separation chamber recess 80. The oil flow inclined surface 80A is formed.

  According to the configuration of the second embodiment, the oil separated from the blow-by gas in the labyrinth passage 92 is guided to the blow-by gas introduction port 78 side by the inclined oil flow inclined surface 80A, thereby being separated. The oil can be actively drained into the cylinder head cover 8.

  In order to prevent the filter element from being polluted by the recirculating blow-by gas, the shape of the air cleaner case and the shape of the filter element can be changed and applied to other internal combustion engines.

It is sectional drawing of the air cleaner by the II line | wire of FIG. 5 in 1st Example. It is a principal part enlarged view of FIG. 1 in 1st Example. It is sectional drawing of the air cleaner by the III-III line of FIG. 5 in 1st Example. It is a left view of the internal combustion engine which removed the supercharger and the intercooler in 1st Example. It is a top view of an air cleaner apparatus in the 1st example. It is a bottom view of an air cleaner device in the 1st example. 1 is a plan view of an internal combustion engine in a first embodiment. It is sectional drawing of an air cleaner in 2nd Example.

Explanation of symbols

2 Internal combustion engine 4 Cylinder block 6 Cylinder head 8 Cylinder head cover 10 Supercharger 12 Air cleaner device 14 Cleaner chamber 16 Air cleaner 20 Resonator 22 Breather chamber 32 Intercooler 42 Throttle body 44 Intake manifold 60 Dirty side case 62 Clean side case 64 Filter element 66 Atmosphere Chamber 68 Clean air chamber 70 Elastic member 72 Blow-by gas introduction passage 74 Gas-liquid separation chamber 76 Atmospheric chamber recess 78 Blow-by gas inlet 80 Gas-liquid separation chamber recess 82 Opening 84 Through hole 86 Lid 88 Case side rib 90 Filter Side rib 92 labyrinth passage 94 blow-by gas outlet hole 96 seal member 98 blow-by gas introduction pipe

Claims (5)

  A cleaner chamber is formed by joining the dusty side case and the clean side case, and the cleaner chamber is formed into an atmosphere chamber and a clean air chamber by a filter element sandwiched between the joint surfaces of the dusty side case and the clean side case. An air cleaner apparatus for an internal combustion engine comprising: an air cleaner that is partitioned; and a gas-liquid separation chamber that is interposed in a blow-by gas introduction passage that introduces blow-by gas into the clean-side case and separates oil in the blow-by gas. The case is provided with a concave portion for an atmospheric chamber forming the atmospheric chamber and a concave portion for a gas-liquid separation chamber having a blow-by gas introduction port to form the gas-liquid separation chamber, and the filter element has the gas-liquid separation chamber A lid provided with a through hole that closes the opening of the concave portion for communication and communicates with the clean air chamber. Air cleaner system for an internal combustion engine to be.   A case side rib is erected in the concave portion for the atmospheric chamber, and a filter side rib inserted between the case side ribs is erected in the lid portion, and a labyrinth passage is formed inside the gas-liquid separation chamber. The air cleaner device for an internal combustion engine according to claim 1, wherein:   2. The filter element according to claim 1, wherein the elastic member that seals between the atmosphere chamber and the clean air chamber is attached to the filter element, and the lid portion is formed by expanding the elastic member. Item 3. An air cleaner device for an internal combustion engine according to any one of Items 2 to 3.   When the air cleaner is mounted on the internal combustion engine, the gas-liquid separation chamber is positioned on the upper surface of the cylinder head cover of the internal combustion engine, and the atmospheric chamber is disposed offset from the upper surface of the cylinder head cover. An air cleaner device for an internal combustion engine according to claim 1.   A blow-by gas lead-out hole is formed on the upper surface of the cylinder head cover, and a blow-by gas introduction pipe that is fitted into the blow-by gas lead-out hole through a seal member protrudes from the gas-liquid separation chamber. The air cleaner apparatus according to claim 4.

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