KR102606664B1 - Vehicle for an intake manifold - Google Patents

Abstract

The present invention relates to an intake manifold for a vehicle, and is intended to prevent malfunction due to backflow of oil and condensate contained in blow-by gas and thereby promote stable operation of the vehicle.

Description

Vehicle intake manifold {Vehicle for an intake manifold}

The present invention relates to an intake manifold for a vehicle, and more specifically, to preventing backflow of oil or condensate contained in the blow-by gas supplied to the intake manifold that supplies the combustion mixture into the cylinder provided in the internal combustion engine. This relates to intake manifolds for vehicles.

In general, a vehicle engine is equipped with one or more cylinders formed by a cylinder head and a cylinder block, and uses kinetic energy generated by combustion of a mixture of fuel and air in an appropriate ratio within each cylinder to drive the vehicle.

The intake manifold functions to uniformly supply the mixture formed in the carburetor to the combustion chamber. The intake manifold has a plenum chamber that temporarily stores the mixture supplied to one side of the lower part, and a new air inflow passage (throttle body) installed to communicate with one side of the plenum chamber and allowing the mixture that has passed through the carburetor to flow. and an intake runner that guides the mixture stored in the plenum chamber to flow into each combustion chamber.

Among the mixture supplied to each combustion chamber through the intake runner, unburned exhaust gas that escapes from the combustion chamber to the crank case through the gap between the cylinder and piston during the compression stroke and expansion stroke is called blow by gas.

The blow-by gas escapes from the combustion chamber into the crankcase, passes through the discharge passage of the cylinder block and cylinder head and the head cover through the PCV (Positive Crankcase Ventilation) system, and is recirculated to the intake manifold through a separate PCV hose.

After the blow-by gas flows into the intake manifold, a small amount of oil or condensate contained in the blow-by gas is maintained. And as the accumulated amount gradually increased, it flowed backwards at once and moved to the valve installed in the intake manifold, causing a problem that caused a breakdown.

In addition, the intake manifold can cause engine malfunction if the reverse direction of oil or condensate flows from the intake manifold to the cylinder, and if repeated for a long period of time, it can cause component failure, so countermeasures against this have become necessary.

Republic of Korea Patent Publication No. 10-2018-0137692

This embodiment was designed to solve the problems of the prior art as described above, and provides an intake manifold for a vehicle that can prevent the stagnation of oil and condensate while promoting stable movement of blow-by gas moving to the intake manifold. We would like to provide

The intake manifold for a vehicle according to this embodiment includes a surge part 100 provided with a gas inlet 110 that provides a space through which blow-by gas flows and is inclined at a first inclination angle θ1 toward the outer upper portion; and a backflow prevention unit 200 provided inside the gas inlet 110 to prevent the blow-by gas from flowing back into the gas inlet 110 after it has flowed through the gas inlet 110. do.

The surge part 100 includes a first unit surge part 102 having an external shape of a predetermined size; a second unit surge part (104) fused to the lower surface of the first unit surge part (102); a third unit surge part (106) fused to the lower surface of the second unit surge part (104); It includes a runner part 108 formed to a predetermined size inside the surge part 100 to provide a space through which the blow-by flows, wherein the gas inlet 110 is connected to the second unit surge part 104. is formed in

The gas inlet 110 is disposed inclined downward from the second unit surge part 104 toward the third unit surge part 106.

The second unit surge part 104 branches upward while looking at the gas inlet 110 from the end of the horizontal extension part 104a extending horizontally in the transverse direction of the surge part 100 and slanting upward toward the outer upper part. a first extension portion (104b); It includes a second extension part 104c that branches horizontally in the transverse direction from the extended end of the horizontal extension part 104a and extends to the backflow prevention part 200.

The first extension part 104b includes a first through hole 104b1 opened to allow the blow-by gas to move to the first unit surge part 102; A second through hole 104b2 is formed in the second extension part 104c to allow the blow-by gas to move to the third unit surge part 106.

The first through hole 104b1 is characterized in that it is opened to be inclined upward toward the gas inlet 110 by the first extension portion 104b.

The second unit surge part 104 includes a first round part 104d1 that is rounded and inclined downward at a predetermined length in the axial direction toward the third unit surge part 106, and is inclined upward and extends in the circumferential direction; It further includes a third extension portion 104d in which a first inclined portion 104d2 is inclined upward from an extended end of the first round portion 104d1 toward the gas inlet 110.

The backflow prevention unit 200 includes a groove 210 extending to a predetermined depth from the second unit surge part 104 toward the third unit surge part 106; The third unit surge part 106 includes a backflow prevention plate 220 protruding to be inserted into the groove 210.

The groove portion 210 extends to a first length (L1) in the horizontal direction, to a second length (L2) in the vertical direction, and to a first depth (dp1) in the depth direction, wherein the first length ( L1) is characterized in that it extends relatively longer than the second length (L2).

The groove portion 210 includes a first wall portion 212 formed at a position facing the front of the backflow prevention plate 220; a second wall portion 214 formed at a position facing the back of the backflow prevention plate 220 and extending to a relatively lower height than the first wall portion 212; It is formed at a position facing the side of the backflow prevention plate 220 and includes a third wall portion 216 connecting the first and second wall portions 212 and 214.

The second wall portion 214 is located at a lower position than the upper end of the backflow prevention plate 220.

A drain hole 210a opening toward the third unit surge part 106 is formed in the groove 210 so that oil or condensate contained in the blow-by gas can drain into the third unit surge part 106.

A drain inclined portion 106a inclined toward the drain hole 210a is formed in the third unit surge part 106.

The backflow prevention plate 220 is spaced apart from the inner front surface of the groove portion 210 by a first distance d1 based on the opening width W of the groove portion 210, and is located at the inner rear surface of the groove portion 210. It is spaced apart from the side of the groove 210 by a second distance d2, and is spaced apart from the side of the groove 210 by a third distance d3.

The first gap d1 is characterized by being spaced apart relatively longer than the second gap d2.

The backflow prevention plate 220 is formed with a first backflow inclined portion 222 whose upper surface is inclined downward toward the second wall portion 214.

The first counterflow inclined portion 222 extends with the upper left and right sides inclined downward toward the center.

The backflow prevention plate 220 further includes a drain groove 224 extending in the vertical direction on a counter surface facing the first wall portion 212 and the second wall portion 214.

This embodiment having the above configuration can stably induce the movement of blow-by gas into the intake manifold while minimizing problems due to backflow of oil or condensate.

In these embodiments, malfunctions due to backflow can be prevented by changing the structure so that even if some oil and condensate accumulates inside the intake manifold, it drains into the runner part.

In these embodiments, by changing the internal structure of the intake manifold, the inflow and distribution of blow-by gas can be stably performed, while movement to the gas inlet due to backflow can be minimized.

1 is a perspective view showing an intake manifold according to an embodiment of the present invention.
Figure 2 is an exploded perspective view of Figure 1.
Figure 3 is a cross-sectional view showing the gas inlet and backflow prevention portion of the intake manifold according to this embodiment.
Figures 4 and 5 are cross-sectional perspective views showing Figure 3 from different angles.
6 to 7 are diagrams showing a backflow prevention unit according to this embodiment.
Figure 8 is a perspective view showing the backflow prevention unit according to this embodiment from another angle.
Figure 9 is a longitudinal cross-sectional view of the backflow prevention unit according to this embodiment.
Figure 10 is a cross-sectional view showing another example of the backflow prevention unit according to this embodiment.
Figure 11 is a perspective view showing the backflow prevention unit viewed from the outside of the gas inlet according to this embodiment.

The advantages and features of the present disclosure, and methods for achieving them, will become clear with reference to the embodiments described in detail below in conjunction with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below and will be implemented in various different forms, but these embodiments only ensure that the disclosure of the present disclosure is complete and are within the scope of common knowledge in the technical field to which this disclosure pertains. It is provided to fully inform those who have the scope of the disclosure, and the disclosure is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

A component is said to be “connected to” or “coupled to” another component when it is directly connected or coupled to another component or with an intervening other component. Includes all cases. On the other hand, when one component is referred to as “directly connected to” or “directly coupled to” another component, it indicates that there is no intervening other component. “And/or” includes each and every combination of one or more of the mentioned items.

The terminology used herein is for the purpose of describing embodiments and is not intended to limit the disclosure. As used herein, singular forms also include plural forms, unless specifically stated otherwise in the context. As used in the specification, “comprises.” and/or “comprising” means that a referenced component, step, operation and/or element does not exclude the presence or addition of one or more other components, steps, operations and/or elements.

For reference, Figure 1 attached is a perspective view showing an intake manifold according to an embodiment of the present invention, Figure 2 is an exploded perspective view of Figure 1, and Figure 3 is a gas inlet and counterflow of the intake manifold according to this embodiment. It is a cross-sectional view showing the prevention part, and Figures 4 and 5 are cross-sectional perspective views showing Figure 3 from different angles.

Referring to the attached FIGS. 1 to 5, the intake manifold for a vehicle according to this embodiment includes a surge pod 100 and an adapter (not shown) below the surge part 100. The surge part 100 is made in the form of a plate-shaped rectangular parallelepiped and has an intake port 112 through which air supplied from a throttle body (not shown) flows in on one side, and connects the intake port 112 and the surge part 100. The duct is formed as one piece.

Additionally, a valve actuator 130 is installed on the other side of the surge part 100 to operate a valve (not shown) that changes the air flow path inside the surge part 100 according to the operating state of the engine.

The adapter is disposed at the lower part of the surge part 100, the lower surface of which is fastened to a cylinder head (not shown), and provides a flow path for transferring air temporarily stored inside the surge part 100 to the inside of the cylinder. .

The surge part 100 and the adapter are manufactured as separate parts, and when fastened to the cylinder head, only the adapter is fastened to the cylinder head first and then combined later.

The detailed configuration of the vehicle intake manifold connected to the adapter as described above will be described in more detail. For reference, this embodiment will mainly be described as a configuration that prevents condensate or oil contained in the blow-by gas from flowing back into the gas inlet 110, which will be described later.

This embodiment provides a space for blow-by gas to flow in, and includes a surge part 100 formed with a gas inlet 110 inclined at a first inclination angle θ1 toward the outer upper portion, and the blow-by gas flowing through the gas inlet 110. ) and includes a backflow prevention unit 200 provided inside the gas inlet 110 to prevent backflow into the gas inlet 110 after flowing in through the gas inlet 110.

The surge part 100 includes a first unit surge part 102 having an external shape of a predetermined size, a second unit surge part 104 fused to the lower surface of the first unit surge part 102, and the first unit surge part 104. A third unit surge part 106 fused to the lower surface of the two-unit surge part 104 and a runner part 108 formed to a predetermined size inside the surge part 100 to provide a space through which the blow-by flows. ) includes. And the gas inlet 110 is formed in the second unit surge part 104.

Since the first to third unit surge parts 102, 104, and 106 are tightly coupled to each other by a vibration fusion method, assembly is easy and it is possible to improve the operator's workability and work speed at the same time.

The runner portion 108 includes a first runner portion 108a formed inside the first unit surge part 102 and a second runner portion 108b formed inside the third unit surge part 106. Includes.

The runner unit 108 is composed of a total of N runners arranged in two rows when viewed from above. Here, the number and arrangement of the runners may vary depending on the type of engine.

For example, if the adapter is applied to an in-line 4-cylinder engine, four runners may be arranged in a row, and if the adapter is applied to a V-type 8-cylinder engine, the runners may be arranged in two rows, four in each row.

In this embodiment, after the blow-by gas flows into the gas inlet 110, the blow-by gas is stably distributed through the second unit surge part 104, and some of the flowed-back oil or condensate is By moving to the third unit surge part 106, distribution and movement can be stably implemented through the surge part 100.

The gas inlet 110 is disposed to be inclined downward from the second unit surge part 104 toward the third unit surge part 106. For example, the first inclination angle θ1 is a minimum of 8 degrees and a maximum of 10 degrees. It is placed at an angle.

In this way, when the gas inlet 110 has the above-described first inclination angle θ1 and is disposed to be inclined downward from the second unit surge part 104 toward the third unit surge part 106, the blow-by gas is Even when it flows back after flowing into the gas inlet 110, the oil or condensate contained in the blow-by gas is partially moved to the gas inlet 110 and then flows back as described later due to the slope of the inclined gas inlet 110. It may be moved to the prevention unit 200.

In particular, in this embodiment, the gas inlet 110 is disposed inclined at a first inclination angle, and condensate or oil can be induced to drain through the backflow prevention unit 200, so that a large amount of condensate or oil can be temporarily discharged into the surge part 100. You can prevent the phenomenon of moving to .

The gas inlet 110 is formed in the shape of a tube and maintains a cylindrical shape up to the position where the backflow prevention part 200, which will be described later, is installed based on the cross-sectional view, and the inner diameter is gradually reduced past the backflow prevention part 200. do.

The second unit surge part 104 according to this embodiment faces the gas inlet 110 at the end of the horizontal extension part 104a extending horizontally in the transverse direction of the surge part 100 and faces the upper outer side. A first extension portion 104b that is inclined upward and branched, and a second extension portion 104c that branches horizontally in the transverse direction from the extended end of the horizontal extension portion 104a and extends to the backflow prevention portion 200. ) includes.

The second unit surge part 104 has a horizontal extension portion 104a extending transversely from the center of the surge part 100 to the length shown in the drawing, and, based on the drawing, at the right end of the horizontal extension portion 104a. The first extension part 104b and the second extension part 104c are each branched and extended.

A first through hole 104b1 is formed in the first extension part 104b, and a second through hole 104b2 is formed in the second extension part 104c.

The first through hole 104b1 is open to allow the blow-by gas to move to the first unit surge part 102, and the second through hole 104b2 is open to allow the blow by gas to move to the third unit surge part 106. By gas is formed to move.

The first through hole 104b1 is opened by the first extension 104b to be inclined upward toward the gas inlet 110, so that when oil or condensate flows back, it flows toward the second through hole 104b2. It can be guided to drain, or it can be guided to drain to one bottom surface of the second through hole 104b2.

After the blow-by gas flows in through the gas inlet 110, it is moved to the first runner portion 108a through the first through hole 104b1, and to the second runner portion through the second through hole 104b2 ( It can be easily moved to 108b).

The second unit surge part 104 according to this embodiment is formed with a third extension part 104d along with the first and second extension parts 104b and 104c described above.

The third extension part 104d includes a first round part 104d1 that is rounded and inclined downward at a predetermined length in the axial direction toward the third unit surge part 106, and is inclined upward and extended in the circumferential direction, It includes a first inclined part 104d2 inclined upward from the extended end of the first round part 104d1 toward the gas inlet 110.

The third extension portion 104d is configured as above to prevent the blow-by gas from flowing back to the gas inlet 110 from the lower position of the inner circumferential surface to the outside of the surge part 100 as much as possible.

In particular, the first inclined portion 104d2 does not extend horizontally but extends upwardly toward the gas inlet 110, minimizing the phenomenon of backflow to the outside of the gas inlet 110 even when some oil or condensate flows back. It can be.

The first round part 104d1 does not extend horizontally but extends roundly toward the first inclined part 104d2, thereby minimizing resistance caused by the movement of blow-by gas.

Referring to the attached FIGS. 6 to 8, the backflow prevention unit 200 according to this embodiment is located between the second extension part 104c and the third extension part 104d, and the second unit surge part ( A groove portion 210 extending to a predetermined depth from 104) toward the third unit surge part 106, and a backflow prevention plate protruding from the third unit surge part 106 to be inserted into the groove portion 210 ( 220).

The reason why the backflow prevention unit 200 is located at the above position is to ensure stable inflow of blow-by gas through the gas inlet 110, while minimizing movement to the outside of the gas inlet 110 when backflow occurs, and to minimize movement to the outside of the gas inlet 110 through the drain hole 210a. ) to facilitate the movement of oil and condensate.

The groove portion 210 is formed to provide a space for draining backflowed condensate or oil, and for example, extends in the horizontal direction to a first length (L1) and in the vertical direction to a second length (L2), It extends to a first depth dp1 in the depth direction, and the first length L1 extends relatively longer than the second length L2.

The reason why the first length (L1) extends longer than the second length (L2) in this way is that when condensate or oil is drained, the second extension portion (104c) extends horizontally, so that condensate or oil flows into the inside of the groove portion (210). This is because it is more advantageous in inducing oil.

In addition, due to the cross-sectional structure of the area where the backflow prevention unit 200 is located, it is advantageous in terms of layout that the first length L1 extends longer than the second length L2.

The groove portion 210 is formed at a position facing the back of the backflow prevention plate 220 and a first wall portion 212 formed at a position facing the front of the backflow prevention plate 220, and the first wall portion 212 is formed at a position facing the front of the backflow prevention plate 220. (212) A second wall portion 214 extending to a relatively lower height is formed at a position facing the side of the backflow prevention plate 220, and connects the first and second wall portions 212 and 214. It includes a third wall portion 216.

The second wall portion 214 is located at a lower position than the upper end of the backflow prevention plate 220. The reason for this low position is that the blow-by gas contacts the surface of the backflow prevention plate 220, causing oil or condensate. This is to move to the inside of the groove portion 210.

Additionally, the second wall portion 214 is formed to stably lead the drain of oil and condensate without reducing the inner diameter of the air inlet 100.

The first to third wall portions 212, 214, and 216 extend vertically, but may also extend at other angles.

A drain hole 210a is formed in the groove 210 to open toward the third unit surge part 106 so that oil or condensate contained in the blow-by gas can drain into the third unit surge part 106. Oil or condensate flowing into the groove 210 can be stably drained.

The drain hole 210a is in communication with the second runner portion 108b formed in the third unit surge part 106, so oil or condensate can be stably drained.

The backflow prevention plate 220 according to this embodiment is spaced apart from the inner front surface of the groove 210 at a first distance d1 based on the opening width W of the groove 210, and the groove 210 ) is spaced apart from the inner rear surface at a second distance d2, and is spaced apart from the side of the groove 210 at a third distance d3.

The backflow prevention plate 220 has an upper surface that extends upward based on the drawing to a position that is relatively higher than the first wall portion 212. The reason why the backflow prevention plate 220 extends like this is to prevent a large amount of oil or condensate from moving at once when backflow occurs toward the gas inlet 110.

In addition, most of the oil or condensate that flows back by the backflow prevention plate 220 first moves to the inside of the groove 210 and then is drained, and some of the oil or condensate that has not flowed in does not move to the outside of the gas inlet 110. Backflow is prevented by the above-described first inclined portion 104d2.

The backflow prevention plate 220 maintains first to third intervals d1, d2, and d3 in the groove 210, and the first interval d1 is relatively longer than the second interval d2. do.

The reason why the backflow prevention plates 220 are spaced apart in this way is to make the space through which backflow oil or condensate flows into a space larger than the second gap d2, thereby allowing the backflow prevention plates 220 to move more stably inside the groove 210.

If the second gap d2 is formed larger than the first gap d1, oil or condensate may be drained, but may partially move to the gas inlet 110 via the backflow prevention plate 220. Therefore, it is preferable to form it as described above.

The backflow prevention plate 220 is inserted into the groove 210 and is positioned at the L2/2 position based on the second length L2 of the groove 210 when viewed from above. The position is located as above in consideration of the movement of oil or condensate flowing back in the reverse flow direction (B), which is opposite to the inflow direction (A) of the blow-by gas.

Referring to the attached FIG. 9, in this embodiment, a drain inclined portion 106a inclined toward the drain hole 210a is formed in the third unit surge part 106.

The drain inclined portion 106a is inclined toward the drain hole 210a so that oil or condensate moves more quickly to the drain hole 210a. In this case, oil or condensate may not remain stagnant on the inner surface of the groove 210 but may immediately move to the drain hole 210a.

Referring to the attached FIGS. 10 and 11, the backflow prevention plate 220 according to the present embodiment extends in the vertical direction on the opposing surface facing the first wall portion 212 and the second wall portion 214. A drain groove 224 is formed.

The drain groove 224 is formed to a predetermined depth, and increases the contact area where the oil and condensate contained in the blow-by gas come into contact, so that a larger amount of condensate and oil can be drained toward the inside of the groove 210. By doing so, mobility to the drain hole 210a can be further improved.

Additionally, when the blow-by gas flows back, movement to the gas inlet 110 can be kept to a minimum to minimize problems due to backflow.

The backflow prevention plate 220 is formed with a first backflow inclined portion 222 whose upper surface is inclined downward toward the second wall 214, and the left and right upper surfaces extend with a downward slope toward the center.

The first counterflow inclined portion 222 serves to guide the direction of movement in the space between the first and second extension parts 104b and 104b when the blow-by gas moves in the inflow direction and to direct oil and condensate in the counterflow direction. When moved, it can simultaneously serve to guide the direction of drain at the second interval d2.

In this case, the stability of the blow-by gas is improved due to its movement, and it is possible to prevent the blow-by gas from moving to the gas inlet 110 even if some of it flows back in the reverse direction.

The first backflow inclined portion 222 is in relation to the shape of the upper surface of the backflow prevention plate 220 and is not formed flat but inclined in a rounded shape to guide the direction of movement of the blow-by gas when it moves in the inflow direction, Even when oil and condensate move in the reverse direction, the probability of reverse flow into the gas inlet 110 can be minimized by draining the oil and condensate at the above-mentioned second interval d2.

An embodiment of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of the present invention is limited only by the matters stated in the claims, and those skilled in the art can improve and change the technical idea of the present invention into various forms. Therefore, as long as such improvements and changes are obvious to those skilled in the art, they will fall within the scope of the present invention.

100: Surge part
102, 104, 106: 1st, 2nd, 3rd unit bibliography parts
104a: horizontal extension
104b: first extension
104b1, 104b2: 1st and 2nd through holes
104c: second extension part
104d: third extension
104d1, 104d2: 1st and 2nd rounds
106a: drain slope
108: Runner section
110: gas inlet
200: backflow prevention unit
210: Home department
210a: drain hole
212, 214, 216: 1st, 2nd, 3rd walls
220: backflow prevention plate
222: first counterflow slope
224: second countercurrent slope
d1, d2, d3: 1st, 2nd, 3rd interval

Claims (17)

A surge part 100 provided with a gas inlet 110 inclined at a first inclination angle θ1 toward the outer upper portion and providing a space for blow-by gas to flow into the surge part 100; and
After the blow-by gas flows through the gas inlet 110, the oil or condensate contained in the blow-by gas is installed inside the gas inlet 110 to prevent the oil or condensate contained in the blow-by gas from flowing back into the gas inlet 110. It includes a backflow prevention unit 200,
The surge part 100 includes a first unit surge part 102 having an external shape of a predetermined size, a second unit surge part 104 fused to the lower surface of the first unit surge part 102, and the first unit surge part 104. It includes a third unit surge part (106) fused to the lower surface of the second unit surge part (104),
The backflow prevention unit 200 includes a groove 210 extending to a predetermined depth from the second unit surge part 104 toward the third unit surge part 106, and a third unit surge part 106. An intake manifold for a vehicle including a backflow prevention plate 220 protruding to be inserted into the groove 210. According to claim 1,
The surge part 100 further includes a runner portion 108 formed within a predetermined size to provide a space through which the blow-by flows,
The gas inlet 110 is an intake manifold for a vehicle formed in the second unit surge part 104. According to claim 1,
The gas inlet 110 is disposed to be inclined downward from the second unit surge part 104 toward the third unit surge part 106. According to claim 1,
The second unit surge part 104 branches upward while looking at the gas inlet 110 from the end of the horizontal extension part 104a extending horizontally in the transverse direction of the surge part 100 and slanting upward toward the outer upper part. a first extension portion (104b);
An intake manifold for a vehicle including a second extension portion (104c) branched horizontally in the transverse direction from an extended end of the horizontal extension portion (104a) and extending to the backflow prevention portion (200). According to clause 4,
The first extension part 104b includes a first through hole 104b1 opened to allow the blow-by gas to move to the first unit surge part 102;
An intake manifold for a vehicle in which a second through hole (104b2) is formed in the second extension portion (104c) to allow the blow-by gas to move to the third unit surge part (106). According to clause 5,
An intake manifold for a vehicle, wherein the first through hole (104b1) is opened to be inclined upward toward the gas inlet (110) by the first extension portion (104b). According to clause 4,
The second unit surge part 104 includes a first round part 104d1 that is rounded and inclined downward at a predetermined length in the axial direction toward the third unit surge part 106, and is inclined upward and extends in the circumferential direction;
An intake manifold for a vehicle, further comprising a third extension portion (104d) with a first inclined portion (104d2) inclined upward from an extended end of the first round portion (104d1) toward the gas inlet (110). delete According to claim 1,
The groove portion 210 extends to a first length (L1) in the horizontal direction, to a second length (L2) in the vertical direction, and to a first depth (dp1) in the depth direction,
An intake manifold for a vehicle, characterized in that the first length (L1) extends relatively longer than the second length (L2). According to claim 1,
The groove portion 210 includes a first wall portion 212 formed at a position facing the front of the backflow prevention plate 220;
a second wall portion 214 formed at a position facing the back of the backflow prevention plate 220 and extending to a relatively lower height than the first wall portion 212;
An intake manifold for a vehicle including a third wall portion (216) formed at a position facing a side of the backflow prevention plate (220) and connecting the first and second wall portions (212, 214). According to claim 1,
The groove portion 210 has a drain hole 210a opened toward the third unit surge part 106 to drain the oil or condensate contained in the blow-by gas into the third unit surge part 106. Manifold. According to claim 11,
An intake manifold for a vehicle in which a drain inclined portion (106a) inclined toward the drain hole (210a) is formed in the third unit surge part (106). According to claim 1,
The backflow prevention plate 220 is spaced apart from the inner front surface of the groove portion 210 by a first distance d1 based on the opening width W of the groove portion 210, and is located at the inner rear surface of the groove portion 210. The intake manifold for a vehicle is spaced apart from the side of the groove 210 at a second distance d2, and is spaced apart from the side of the groove 210 at a third distance d3. According to claim 13,
An intake manifold for a vehicle, characterized in that the first gap (d1) is relatively longer than the second gap (d2). According to claim 10,
The backflow prevention plate 220 is an intake manifold for a vehicle having a first backflow inclined portion 222 whose upper surface is inclined downward toward the second wall portion 214. According to claim 15,
The first counterflow inclined portion 222 is an intake manifold for a vehicle in which the upper left and right sides are inclined downward toward the center and extended. According to claim 10,
The backflow prevention plate (220) is an intake manifold for a vehicle, further including a drain groove (224) extending in the vertical direction on a counter surface facing the first wall portion (212) and the second wall portion (214).

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