KR101822832B1 - Separator for internal-combustion engine - Google Patents

Abstract

Disclosed is a separator for an internal combustion engine that separates evaporative engine oil from blowby gas generated by the stroke of an internal combustion engine. The separator is provided on a head cover of an internal combustion engine and has an inlet port through which blowby gas is introduced A duct including a duct body and a duct cover for shielding an upper portion of the duct body and formed with a discharge port through which a blowby gas is discharged so that blowby gas can flow from the inlet to the discharge port, A reflux induction means for introducing a reflux stream into the blowby gas introduced through the inlet and separating the evaporated engine oil from the blowby gas and a reflux induction means provided in the rear of the reflux induction means for causing the evaporation engine Separation of oil and filtration of foreign matter contained in blow- The separator for an internal combustion engine comprising: a is started.

Description

{SEPARATOR FOR INTERNAL-COMBUSTION ENGINE}

TECHNICAL FIELD The present invention relates to a separator for an internal combustion engine, and more particularly, to a separator for an internal combustion engine capable of highly efficiently separating evaporative engine oil from blowby gas generated by the stroke of the internal combustion engine.

Generally, an internal combustion engine such as an engine of a vehicle explodes the intake air, fuel, and a little engine oil together in the cylinder during the explosion stroke. At this time, the cylinder produces blowby gas mixed with the inflow air, incompletely combusted fuel, and a little evaporated engine oil.

Most of these blowby gases are discharged to the outside through the exhaust manifold. However, some of the blowby gas can not be discharged to the exhaust manifold and flows into the head cover at the upper portion of the cylinder. Accordingly, the internal combustion engine is provided with a separator for recovering the engine oil evaporated in the blowby gas flowing into the head cover, and for re-supplying the blowby gas to the cylinder.

Korean Patent No. 10-1054035 entitled "Separator for Internal Combustion Engine" filed by the applicant of the present invention is disclosed as a separator preceded by the present invention.

The separator of the prior art is integrally provided in the head cover HC of the internal combustion engine as shown in Fig. 1, and the blowby gas introduced into the inlet 52 is firstly separated from the evaporative engine oil by the baffle 54 A duct 50 and a centrifugal separator 60 for separating the evaporated engine oil from the evaporated engine oil while rotating the blowby gas passing through the duct 50 through the circular flow passage 62; A damping chamber 80 having a discharge hole 82 while damping the pressure of the blowby gas and a regulator for regulating the blowby gas to a predetermined pressure, (90).

In this prior art separator, the blowby gas introduced into the inlet flows sequentially through the centrifugal separator 60 and the cyclone 70, is discharged to the discharge hole 82 through the damping chamber 80, and the evaporative engine oil is separated And discharged to the oil hole 72 provided in the cyclone 70. [

However, in the prior art separator, since the duct 50, which primarily separates the evaporative engine oil from the blowby gas, has a planar structure, the contact area between the blowby gas and the duct 50 is insufficient, there is a problem.

In addition, since the separator of the prior art does not have a separate filter for filtering the foreign matter contained in the blowby gas, it is difficult to filter the foreign matter, and the foreign matter contained in the blowby gas during the blowby gas movement from the inlet to the exhaust hole There is a problem that it is fixed to the wall surface of the flow path formed inside the separator.

KR 10-1054035 B1 (August 3, 2011)

SUMMARY OF THE INVENTION The present invention has been made in an effort to solve the above-mentioned problems, and has an object of providing a vacuum cleaner having a simple structure, capable of effectively separating and recovering evaporative engine oil in blowby gas by increasing the contact area with blowby gas, And an object of the present invention is to provide a separator for an internal combustion engine.

Another object of the present invention is to provide a separator for an internal combustion engine capable of easily filtering foreign matter contained in blowby gas to prevent foreign matter from adhering to the wall surface of the flow path formed in the separator.

It is also an object of the present invention to provide a separator for an internal combustion engine having a structure that can be varied so that the flow of a flow of a separator does not stagnate according to the flow velocity of the blowby gas.

According to an aspect of the present invention, there is provided a separator for an internal combustion engine, which separates evaporative engine oil from blowby gas generated by the stroke of the internal combustion engine, the separator being provided on a head cover of the internal combustion engine, And a duct cover formed with a duct for shielding an upper portion of the duct body and formed with a discharge port through which the blowby gas is discharged so that the blowby gas can flow from the inlet to the discharge port, Which is provided in a flow path of the blow-by gas and induces a flow of the blow-by gas introduced through the inlet to separate the evaporative engine oil from the blow-by gas, and a blow- It separates the evaporating engine oil from the blowby gas and removes foreign matter contained in the blowby gas. Wherein the separator for an internal combustion engine comprises an impactor for filtering.

Here, the reflux induction means includes a plurality of guide portions for guiding blowby gas by forming wave-shaped flow paths in the duct, and protrusions protruding from the surfaces of the guide portions and forming gaps for allowing the blowby gas to pass therethrough .

Preferably, the projecting portion is formed to be inclined in a direction in which blow-by gas is introduced from the surface of the guide portion.

In addition, it is preferable that a plurality of partition walls are formed in the duct and the slits through which the blowby gas passes are formed on the partition walls.

It is preferable that the height of the partition wall decreases as the blowby gas is discharged.

At this time, the slits formed on the barrier ribs are preferably staggered from each other.

The impactor may further include a front plate having a plurality of inflow nozzles formed on one surface thereof facing the return induction unit, a rear plate spaced from the front plate and having an opening through which the blowby gas is discharged, And a filter made of a porous material to filter the foreign matter through the blowby gas.

Preferably, the front plate has a pressing protrusion formed on the back surface thereof for pressing the filter toward the rear plate.

Preferably, the rear plate includes a shielding protrusion for closing both sides of the filter, and the shielding protrusion is formed with a support protrusion on the lower portion thereof.

The duct body is formed on the upper surface thereof with an internal groove corresponding to the bottom shape of the impactor, and the impactor is placed in the internal groove to be ultrasonically welded.

The impactor includes an impact chamber having a structure in which a plurality of inflow nozzles are formed on one surface of the impactor toward the reflux inducing means and the blowby gas passing through the inflow nozzle is shielded to be discharged only through a grill formed on the impactor, And a porous filter mounted on the filter frame and passing through the blowby gas and filtering the foreign matter, the filter frame being pivotally rotated according to the flow velocity of the blowby gas flowing through the inflow nozzle .

It is preferable that the filter frame is formed with hinge pins on both sides of its upper end and a hinge block is formed on both sides of the upper end of the impact chamber corresponding to the hinge pin so that the filter frame pivots inside the impact chamber .

According to the separator for internal combustion engine according to the present invention, the blowby gas passes through the return induction means to primarily separate the evaporating engine oil, and the blowby gas passing through the return inducing means passes the impactor, And the foreign matter contained in the blowby gas is filtered through the filter to effectively separate and recover the evaporated engine oil from the blowby gas.

In addition, according to the present invention, since the foreign substances contained in the blowby gas are filtered by the filter interposed in the impactor, the foreign matter is prevented from sticking to the inner wall surface of the duct.

1 is a cross-sectional view showing a conventional separator.
2 is an exploded perspective view showing a separator for an internal combustion engine according to the present invention.
3 is a cross-sectional perspective view showing a reflux induction means of the separator for an internal combustion engine according to the present invention.
4 is a cross-sectional perspective view showing another embodiment of the reflux induction means of the separator for an internal combustion engine according to the present invention.
Fig. 5 is a view showing still another embodiment of the circulation likelihood means among the separators for an internal combustion engine according to the present invention.
6 is an exploded perspective view showing another embodiment of the impactor of the separator for an internal combustion engine according to the present invention.
7 is a cross-sectional view showing the impactor according to FIG.
8 is a cross-sectional view showing the operation of the impactor according to FIG.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor may properly define the concept of the term to describe its invention in the best possible way And should be construed in accordance with the principles and meanings and concepts consistent with the technical idea of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 2 is an exploded perspective view showing a separator for an internal combustion engine according to the present invention, and Fig. 3 is a cross-sectional perspective view showing a reflux induction means in the separator for an internal combustion engine according to the present invention.

The separator for an internal combustion engine according to the present invention is provided with a duct 100 including a duct body 110 and a duct cover 120. The separator 100 is installed in a duct formed inside the duct 100, A reflux induction means 130 for inducing a reflux to the blowby gas to separate the evaporative engine oil from the blowby gas and a reflux induction means 130 installed at the rear of the reflux induction means 130 for blowing the blow- And an impactor 140 for separating the oil and filtering the foreign substances contained in the blowby gas.

In addition, the duct 100 is provided on the head cover of the internal combustion engine and has a tubular structure for transferring the blowby gas. At this time, the duct 100 may be integrally formed with the head cover or may be separately manufactured and assembled with the head cover.

The duct 100 includes a duct body 110 formed in a head cover of the internal combustion engine and having an inlet port 112 through which the blowby gas flows, a duct body 110 shielding the upper portion of the duct body 110, And a duct cover 120 in which a flow path is formed so that blowby gas can flow from the inlet port 112 to the outlet port 122.

The duct body 110 is formed with an inlet port 112 through which blowby gas generated by the internal combustion engine is introduced and a duct cover 120 installed at an upper portion of the duct body 110, (122) is formed.

In other words, the inlet port 112 is formed on the bottom surface of the duct body 110, and the blowby gas is guided to flow upward through the inlet port 112, and flows through the inlet port 112 of the duct body 110 The blowby gas moves through the flow path formed in the duct cover 120 and is discharged through the discharge port 122 formed on the upper surface of the duct cover 120.

2 and 3, the oil drain 116 is formed on the bottom surface of the duct body 110 adjacent to the discharge port 122 formed in the duct cover 120, An oil trap for collecting the evaporated engine oil separated from the blowby gas while passing through the means 130 and the impactor 140 and an oil outlet for discharging the evaporated engine oil collected in the oil trap.

When the blowby gas moves along the flow path connecting the inlet port 112 and the outlet port 122 formed in the duct 100, the evaporation engine oil is primarily separated from the flow inducing means 130, (140) separates the evaporated engine oil from the blowby gas passing through the flow induction means (130), and at the same time, filters the foreign substances contained in the blowby gas.

The reflux induction means 130 induces a reflux to the blowby gas introduced through the inlet 112 to primarily remove the evaporated engine oil from the blowby gas. 3, the flow induction means 130 includes a plurality of guide portions 131 for guiding blowby gas by forming a flow path in the form of a wave on the duct 100, and a plurality of guide portions 131 for guiding blowby gas, And a protrusion 132 protruding and forming a gap to allow the blowby gas to pass therethrough.

When the flow induction means 130 is provided adjacent to the inlet port 112 formed in the duct body 110 as described above, the blowby gas moved into the duct 100 through the inlet port 112 is guided in a wave- And the vortex is generated by passing through the plurality of protrusions 132 formed on the guide part 131 so that the guide part 131 having a lower temperature than the blowby gas is brought into contact with the surface of the protrusion 132 While the evaporative engine oil is primarily separated.

In this way, the evaporative engine oil contained in the blowby gas can be separated from the surface of the guide portion 131 as shown in Fig. 3 by the protruding portion 132 extending vertically toward the counterpart guide portion 131, The guide portion 132 may be formed to be inclined in the direction in which blow-by gas is introduced from the surface of the guide portion 131 as shown in Fig.

4, when the projecting portion 132 is inclined in the direction in which the blowby gas is introduced from the surface of the guide portion 131, when the projecting portion 132 is formed to be in contact with the blowby gas while increasing the contact area of the blowby gas, As described above, when vortex generation becomes active, the blowby gas is prevented from flowing to the surface of the guide portion 131 or the protrusion 132, There is a greater chance of contact, and the evaporative engine oil can be separated smoothly from the blowby gas.

The flow induction means 130 may generate a vortex so that the evaporative engine oil can be separated from the blowby gas by the wavy guide portion 131 and the protruding portion 132, A plurality of partition walls 133 are formed on the flow path of the duct 100 and the slits 134 through which the blowby gas passes are formed in the partition 133 to separate the evaporation engine oil from the blowby gas You may.

5, when a plurality of partitions 133 are formed on the flow path of the duct 100 and the slits 134 are formed in the partitions 133, the blow- The gas passes through the slit 134 while causing a swirling flow in front of the partition 133 and the blowby gas that has passed through the slit 134 repeats the swirling motion again in the partition 133. As a result, Evaporating engine oil from gas can be separated smoothly.

As described above, the plurality of partition walls 133 formed with the slits 134 may be formed to have the same height in the flow path of the duct 100, but in some cases, as shown in FIG. 5, The height of the free end of the partition 133 may be reduced and the space between the free end of the partition 133 and the duct body 110 may be increased.

As the height of the partition wall 133 becomes smaller as the blowby gas is discharged, the space between the free end of the partition 133 and the duct body 110 increases. As a result, as the blowby gas is discharged, The resistance to the fluid movement of the gas is reduced, so that the evaporation engine oil can be smoothly separated from the blowby gas while quickly moving the blowby gas.

In addition, when the plurality of barrier ribs 133 are formed as described above, the slits 134 formed in the barrier ribs 133 may be staggered from each other. When the slits 134 formed in the partition 133 are formed to be staggered, swirling flows between the partition 133 and the partition 133 without allowing the blowby gas to pass through the plurality of the partition 133 instantaneously, The opportunity of contact of blowby gas with the surface of the partition wall 133 is increased, and the evaporated engine oil can be smoothly separated.

On the other hand, an impactor 140 for separating the evaporated engine oil from the blowby gas by the collision with the blowby gas and filtering the foreign substances contained in the blowby gas is provided at the rear of the return induction means 130.

2 and 3, the impactor 140 includes a front plate 141 and a rear plate 142, and a filter 143 provided between the front plate 141 and the rear plate 142 do.

The front plate 141 has a shape of a flat plate having a plurality of inflow nozzles 141a formed on one surface thereof facing the flow induction means 130. The blowby gas that has passed through the flow induction means 130 passes through the front plate 141, The swirling flow is generated before being drawn into the inflow nozzle 141a formed on the front plate 141 so that the blowby gas contacts the surface of the front plate 141 to separate the evaporated engine oil.

A rear plate 142 is provided at the rear of the front plate 141 and spaced apart from the front plate 141 and having an opening 142a through which the blowby gas is discharged. And has the same plate shape as the plate 141.

The filter 143 is provided between the front plate 141 and the rear plate 142 so that the blowby gas passes through the filter 143 to filter the foreign substances. The filter 143 is preferably made of a porous material so that the blow-by gas can pass through the filter 143 to more effectively separate the evaporative engine oil, and the foreign matter contained in the blow- .

That is, the porous filter 143 is interposed between the front plate 141 and the rear plate 142 to pass through the filter 143 while the blowby gas moves from the front plate 141 to the rear plate 142 Thereby separating the evaporating engine oil from the blowby gas.

When the filter 143 is interposed between the front plate 141 and the rear plate 142, the rear plate 142 is separated from the upper surface of the duct 100 by the amount of the filter 143 A shielding protrusion 142b for closing the side surface is formed and the shielding protrusion 142b on which the filter 143 is placed is formed under the shielding protrusion 142b.

When the filter 143 is separated from the bottom surface of the duct body 110 by the support protrusion 142c, the filter 143 is inserted through the opening 142a formed between the filter 143 and the upper surface of the duct body 110, 141 and the rear plate 142 forms a flow path smoothly flowing into the oil drain 116 through the opening 142a to facilitate discharge of the evaporation engine oil.

As described above, the front plate 141 is provided on the rear surface thereof with a filter 143 so that the filter 143 is brought into close contact with the rear plate 142 when the filter 143 is interposed between the front plate 141 and the rear plate 142, A pressing projection 141b for pressing the pressing plate 143 toward the rear plate 142 is formed.

When the filter 143 is brought into close contact with the rear plate 142 by the pressing protrusion 141b formed on the front plate 141 as described above, the blowby gas introduced through the inlet nozzle 141a of the front plate 141 is sucked It is possible to smoothly separate the evaporating engine oil from the blowby gas and effectively filter the foreign matter contained in the blowby gas.

When the impactor 140 including the front plate 141, the rear plate 142 and the filter 143 is installed on the upper surface of the duct body 110 as described above, the impactor 140 is stably fixed, An inlet groove 114 corresponding to the lower end of the impactor 140 is formed on the upper surface of the duct body 110 so that the gas can be discharged through the rear plate 142 through the filter 143, And is placed in the catch groove 114 to be ultrasonically welded.

When the blowby gas flows upward into the duct 100 through the inlet port 112 of the duct body 110, the flow inducing means 130 (130) The blowby gas generates a vortex so that the evaporative engine oil contained in the blowby gas is primarily separated while contacting the surfaces of the guide portion 131 and the protruding portion 132 of the flow induction means 130 .

The blowby gas that has passed through the flow inducing means 130 moves to the impactor 140 and flows into the inflow nozzle 141a formed in the front plate 141. The blowby gas introduced into the inflow nozzle 141a The evaporated engine oil is secondarily separated while passing through the filter 143, and the foreign matter contained in the blowby gas is filtered through the filter to improve the efficiency of separation of the evaporated engine oil.

The blowby gas that has passed through the filter 143 is discharged through the discharge port 122 formed in the upper portion of the duct cover 120 through the opening 142a formed in the lower portion of the rear plate 142. The evaporated engine oil separated from the blowby gas by the front plate 141 and the filter 143 is discharged to the oil drain 116 formed on the upper surface of the duct body 110.

According to the separator for an internal combustion engine of the present invention having the above-described structure, the blowby gas passes through the return induction means 130 to primarily separate the evaporative engine oil, and the blowby gas passing through the return induction means, 140. At the same time, the foreign matter contained in the blowby gas is filtered by the filter 143 to effectively separate and recover the evaporated engine oil from the blowby gas.

In addition, according to the present invention, the foreign substances contained in the blowby gas are filtered by the filter 143 interposed in the impactor 140, thereby preventing foreign matter from sticking to the inner wall surface of the duct 100.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. .

For example, the impactor 140 is not limited to the configurations of the front plate 141, the rear plate 142, and the filter 143 described above, but may be modified and implemented. This will be described with reference to Figs. 6 to 8. Fig.

FIG. 6 is an exploded perspective view showing another embodiment of the impactor of the internal combustion engine according to the present invention, FIG. 7 is a sectional view showing the impactor according to FIG. 6, and FIG. 8 is a sectional view showing the operation of the impactor according to FIG.

As the blowby gas flows into the impactor 140 at an excessive flow rate, the filter 143 installed in the impactor 140 is varied so that a part of the blowby gas does not pass through the filter 143 The impactor 140 is mounted on the impact chamber 144 and the filter frame 145 and the filter frame 145 so as to pass through the impactor 140. The impactor 140 filters the foreign matter through a porous filter 143 ).

The impact chamber 144 is formed with a plurality of inflow nozzles 144d on one side facing the flow induction means 130 and a blowby gas passing through the inflow nozzle 144d is formed on the upper surface of the impact chamber 144 And is shielded to be discharged only through the grill 144b.

The filter frame 145 is installed inside the impact chamber 144 and the impact chamber 144 and is pivotally mounted according to the flow rate of the blowby gas flowing through the inflow nozzle 144d.

A hinge pin 145a is formed on both sides of the upper end of the filter frame 145 and a hinge block 144a is formed on both sides of the upper end of the impact chamber 144 corresponding to the hinge pin 145a, 145) can be pivoted inside the impact chamber (144).

As described above, when the hinge block 144a is formed in the impact chamber 144, the filter frame 145 can be easily inserted into the impact chamber 144 on the upper surface adjacent to one surface of the impact chamber 144 An insertion hole 144c into which the filter frame 145 is inserted is formed and a hinge block 144a is formed on both sides of the insertion hole 144c.

When the insertion hole 144c is formed on the upper part of the impact chamber 144 and the hinge block 144a is formed on both sides of the insertion hole 144c, the filter frame 145 is inserted into the insertion hole 144c, The hinge block 144a is provided with the hinge pin 145a formed on both sides of the upper end of the hinge block 145. [

The impact chamber 144 formed with the insertion hole 144c is closed by providing a cap 146 as shown in FIG. 6, thereby preventing the blowby gas from flowing out through the insertion hole 144c.

As such, when the impactor 140 is composed of the impact chamber 144, the filter frame 145 and the filter 143 and the filter frame 145 is pivotably installed in the impact chamber 144, When the blowby gas generated by the stroke flows into the impactor 140 through the return induction means 130 at an excessive flow rate, the lower end of the filter frame 145 is moved by the flow velocity of the blowby gas as shown in FIG. 8 A part of the blowby gas is allowed to pass through the impactor 140 without passing through the filter 143 so that the blowby gas stays in the impactor 140 So that the blow-by gas can be smoothly discharged.

100: duct 110: duct body
112: inlet 114:
116: Oil drain 120: Duct cover
122: exhaust port 130:
131: guide part 132:
133: partition wall 134: slit
140: Impactor 141: Front plate
141a: Inflow nozzle 141b: Pressing projection
142: rear plate 142a: opening
142b: shielding projection 142c: support projection
143: Filter 144: Impact chamber
144a: Hinge block 144b: Grille
144c: insertion hole 145: filter frame
145a: Hinge pin 146: Cap

Claims (5)

1. A separator for an internal combustion engine, which separates evaporative engine oil from blowby gas generated by the stroke of the internal combustion engine,
A duct body provided in the head cover of the internal combustion engine and formed with an inlet through which the blowby gas flows, and a discharge port through which an upper portion of the duct body is shielded and blowby gas is discharged to allow the blowby gas to flow from the inlet to the outlet A duct comprising a duct cover having a flow path formed therein;
A reflux inducing means provided in the duct of the duct for inducing a reflux to the blowby gas introduced through the inlet to separate the evaporated engine oil from the blowby gas; And
And an impactor installed at the rear of the reflux inducing means for separating evaporative engine oil from the blowby gas by collision with the blowby gas and filtering the foreign matter contained in the blowby gas,
The impactor
An impact chamber having a structure in which a plurality of inflow nozzles are formed on one surface of the impact inducing unit facing the flow inducing unit and the blowby gas passing through the inflow nozzle is shielded to be discharged only through a grill formed on the upper portion;
A filter frame installed inside the impact chamber and pivotally rotating according to a flow rate of the blowby gas flowing through the inflow nozzle; And
And a porous filter mounted on the filter frame and blowing the blowby gas to filter the foreign matter.
The method according to claim 1,
The flow-
A plurality of guide portions for guiding the blowby gas by forming a wavy flow path in the duct; And
And protrusions protruding from surfaces of the respective guide portions and forming gaps to allow blowby gas to pass therethrough.
The method of claim 2,
The protrusion
Wherein the guide portion is inclined in a direction in which blow-by gas is introduced from the surface of the guide portion.
The method according to claim 1,
The flow-
Wherein a plurality of partition walls are formed in the duct and a slit is formed in each of the partition walls to allow blowby gas to pass therethrough.
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