DE102021110255A1 - ENGINE INLET DEVICE - Google Patents

Abstract

An additional gas supply pipe (30) integrally formed on an upper part of an intake manifold (20) contains an inlet-side extension part (38A) in which an additional gas inlet opening (38) which receives an additional gas is formed, and also a branch pipe part (30A) connected to the inlet-side boss part (38A), and a plurality of inlet pipes (23, 24, 25). The branch pipe portion (30A) includes an end inlet pipe (23) at a location adjacent a throttle body retaining flange (27A) toward the bank of cylinders. The intake-side extension part (38A) is located above the end intake pipe (23) at a position near the throttle body support flange (27A) in a direction crossing the direction of the cylinder bank to accommodate the throttle body support flange (27A) or the intake pipe part ( 27) to be connected to the end inlet pipe (23) via a reinforcement rib (28).

Description

[Technical area]

The present invention relates to an engine intake device.

[Technical background]

From the JP 2008-297960 A a conventional engine intake device is known. This from the JP 2008-297960 A known engine intake device includes a head flange at a downstream end of an intake passage and a throttle body retaining flange at an upstream end of the intake passage, and it is configured to connect the intake passage in the vicinity of the throttle body retaining flange with the head side flange, thereby the To increase the rigidity of an intake manifold and to suppress vibrations of the intake manifold.

[Publications]

[Patent specification]

[Patent Document 1] JP 2008-297960 A

[Disclosure of the invention]

[Technical problem]

However, although the conventional engine intake device can suppress vibration of the throttle body support flange, there arises a problem that a degree of freedom for the arrangement of the intake passage is limited. There is still a problem that the engine weight increases because the intake port becomes long.

The present invention has been implemented in view of the above circumstances, and it is an object of the invention to provide an engine intake device which can improve rigidity around the throttle body support flange of the intake manifold without increasing engine weight.

[The solution of the problem]

The present invention provides an engine intake apparatus comprising an intake manifold that introduces air into an engine, the intake manifold including: a surge tank extending toward a bank of cylinders; an intake pipe portion extending upward from one end portion of the surge tank toward the cylinder bank; a throttle body retaining flange disposed at an upstream end of the intake pipe portion, a throttle body being attached to the throttle body retaining flange; and a plurality of intake pipes branching from a lower part of the surge tank and curved so as to pass above the surge tank, downstream ends of the plurality of intake pipes being connected to a cylinder head through a head-side flange, characterized in that a supplementary gas supply pipe that supplies an additional gas to the plurality of intake pipes individually, is integrally formed on an upper part of the intake manifold, the additional gas supply pipe includes: an inlet-side boss portion in which an additional gas inlet port that receives the additional gas is formed; and a branch pipe part connected to the intake-side extension part and the plurality of intake-pipes including a plurality of intake-pipes an end-intake pipe disposed at a position adjacent to the throttle body support flange toward the cylinder bank, the intake-side extension part at above the end-intake pipe a position in the vicinity of the throttle body retaining flange in a direction crossing the direction of the cylinder bank, and the throttle body retaining flange or the intake pipe part is connected to the end intake pipe via a reinforcing rib.

[Advantageous mode of operation of the invention]

It is thus possible according to the invention to obtain an engine intake device which can increase the rigidity in the area of the throttle body retaining flange of the intake manifold without increasing the engine weight.

Figure list

• [ 1 ] 1 Fig. 13 is a rear view of an engine equipped with an engine intake device according to an embodiment of the invention.
• [ 2 ] 2 Fig. 13 is a rear view of an intake manifold and an auxiliary gas supply pipe of the intake device according to the embodiment of the invention.
• [ 3 ] 3 Fig. 13 is a front view of the intake manifold and the auxiliary gas supply pipe of the intake device according to the embodiment of the invention.
• [ 4th ] 4th Fig. 13 is a left side view of the intake manifold and the auxiliary gas supply pipe of the intake device according to the embodiment of the invention.
• [ 5 ] 5 Fig. 13 is a plan view of the intake manifold, the auxiliary gas supply pipe, and the throttle body of the intake device according to the embodiment of the invention.
• [ 6th ] 6th Fig. 13 is a plan view of the intake manifold and the auxiliary gas supply pipe of the intake device according to the embodiment of the invention.
• [ 7th ] 7th Fig. 13 is a perspective view of the intake manifold, the auxiliary gas supply pipe, and the throttle body of the intake device according to the embodiment of the invention.

[Description of the embodiment]

An engine intake device according to an embodiment of the present invention includes an intake manifold that introduces air into an engine, the intake manifold including: a surge tank extending toward a bank of cylinders; an intake pipe portion extending upward from one end portion of the surge tank toward the cylinder bank; a throttle body retaining flange disposed at an upstream end of the intake pipe portion, a throttle body being attached to the throttle body retaining flange; and a plurality of intake pipes branching from a lower part of the surge tank and curved so as to pass above the surge tank, downstream ends of the plurality of intake pipes being connected to a cylinder head through a head-side flange, characterized in that a supplementary gas supply pipe that supplies an additional gas to the plurality of intake pipes individually, is integrally formed on an upper part of the intake manifold, the additional gas supply pipe includes: an inlet-side boss portion in which an additional gas inlet port that receives the additional gas is formed; and a branch pipe part connected to the intake-side extension part and the plurality of intake-pipes including a plurality of intake-pipes an end-intake pipe disposed at a position adjacent to the throttle body support flange toward the cylinder bank, the intake-side extension part at above the end-intake pipe a position in the vicinity of the throttle body retaining flange in a direction crossing the direction of the cylinder bank, and the throttle body retaining flange or the intake pipe part is connected to the end intake pipe via a reinforcing rib. Thus, the engine intake device according to the embodiment of the invention can increase the rigidity in the region of the throttle body retaining flange of the intake manifold without increasing the engine weight.

[Embodiment]

In the following, the engine intake device according to the embodiment of the present invention will be described with reference to the accompanying drawings.

1 until 7th are diagrams illustrating the engine intake device according to the embodiment of the invention. In the 1 until 7th the directions up-down, front-back and left-right are the directions up-down, front-back and left-right of the engine when it is installed in a vehicle, and a direction is orthogonal to the front-rear direction the left-right direction, while an elevation direction of the motor is the up-down direction.

First, a structure will be described. In 1 is an engine 1 equipped with an engine block 1A.

The engine block 1A has a cylinder block 3, a cylinder head 2 connected to an upper part of the cylinder block 3, a head cover 4 above the cylinder head 2 and an oil pan 5 connected to a lower part of the cylinder block 3. The engine block 1A is provided with a chain cover 8 that covers a timing chain (not shown), the chain cover 8 with a right end portion of the cylinder head 2 and the cylinder head 3 is connected.

In the cylinder block 3, a plurality of (three) cylinders (not shown) are formed, each of which houses a piston (not shown) which is movable in the up-down direction. Crankshafts (not shown), which convert the up-and-down movement of the pistons into a rotary movement, are accommodated in the cylinder block 3, with the crankshafts extending in the left-right direction. The plurality of cylinders are arranged side by side in the left-right direction (hereinafter also referred to as “cylinder row direction”) in which the crankshafts extend.

A plurality of combustion chambers (not shown) are in a base part of the cylinder head 2 available. The respective brake chamber is located in the upper area of each cylinder. In this embodiment, the cylinder head has 2 three combustion chambers in a row in left-right direction. An exhaust outlet (not shown in the drawings) is in front of the cylinder head 2 provided to discharge exhaust gases.

To 1 is the engine 1 with an intake manifold 20th fitted. The intake manifold 20th is on a side surface behind the cylinder head 2 attached to air that has passed through an air cleaner (not shown) into a plurality of (three in this embodiment) inlet ports (not shown) of the cylinder 2 to distribute. The motor 1 causes a spark plug (not shown) to ignite and burn the air-fuel mixture consisting of air and fuel coming from the intake ports to discharge the exhaust gas after burning from the exhaust outlet.

After the 2 , 3 and 4th is the intake manifold 20th with an expansion tank 21 extending in the cylinder row direction, further comprising an intake pipe part 27 that extends from one end of the expansion tank 21 extending upward in the cylinder row direction, with a throttle body retaining flange 27A at an upstream end of the inlet pipe part 27 , on which a throttle body 19th is attached, and with a manifold part that extends from a lower area of the expansion tank 21 branches off, turns to above the expansion tank 21 to run past, its downstream end with the cylinder head 2 through a flange at the head 26th connected is. The elbow part 22 consists of a plurality of inlet pipes 23 , 24 and 25th . These inlet pipes 23 , 24 , 25th run parallel to each other in the direction of the cylinder row. The head end flange 26th runs in the direction of the cylinder bank.

The intake manifold 20th is with a make-up gas supply pipe 30th equipped that an exhaust gas as an additional gas into the through the inlet channels 23A, 24A and 25A (see 2 ) the inlet pipes 23 , 24 respectively. 25th introducing flowing air. The additional gas supply pipe 30th is on a top of the intake manifold 20th provided to distribute the make-up gas introduced from an exhaust pipe (not shown) and each inlet pipe 23 , 24 or 25th of the intake manifold 20th to feed.

To 5 , 6th and 7th is the additional gas supply pipe 30th integrated on an upper part of the intake manifold 20th educated. The additional gas supply pipe 30th branches out so that there is the make-up gas in several inlet pipes 23 , 24 and 25th individually directed.

The make-up gas supply pipe 30th contains an inlet-side extension part 38A , in which an additional gas inlet opening 38 that receives the additional gas is formed, and a branch pipe part 30A , the one with the inlet-side extension part 38A and the plurality of inlet pipes 23 , 24 and 25th connected is. These inlet pipes 23 , 24 and 25th contain the inlet pipe 23 as an end inlet tube located at a location adjacent the throttle body retaining flange 27A in the direction of the cylinder bank.

The inlet-side attachment part 38A is located above the inlet pipe 23 at a location near the throttle body retaining flange 27A in a direction (front-rear direction; hereinafter also the vehicle longitudinal direction), which crosses the direction of the cylinder bank, around the throttle body retaining flange 27A or the inlet pipe part 27 and the inlet pipe 23 to be connected via a reinforcement rib.

The branch pipe part 30A contains a first pipe part 31 which extends in a straight line from the inlet-side attachment part 38A in the cylinder row direction on an opposite side of the throttle body retaining flange 27A extends a second pipe part 32 extending from a downstream end of the first pipe section 31 to the head-side flange 26th extends and a first branch pipe part 34 and a second branch pipe part 35 which extend on opposite sides in the direction of the cylinder bank from a downstream end of the second pipe part 32 extend out. The first branch pipe part 34 extends in the direction of the cylinder bank from a downstream end of the second pipe part 32 on the side of the inlet pipe 23 . The reinforcement rib 28 is located in a zone that is enclosed between the first pipe part 31 and the first branch pipe part 34 in the transverse direction (vehicle longitudinal direction). In other words, the reinforcement rib 28 is located in a zone in front of the first pipe part 31 in the transverse direction and behind the first branch pipe part 34 . The branch pipe part 30A includes a third pipe portion 33 connected to a downstream end of the second branch pipe portion 35 , and a third branch pipe part 36 and a fourth branch pipe part 37 which extend from a downstream end of the third pipe part 33 from opposite sides.

To 7th is the intake manifold 20th with a variety of approaches 27B equipped by a peripheral portion of the inlet pipe part 27 on opposite sides of the cylinder head 2 protrude, and the intake manifold has a horizontal rib 29 that goes with the inlet pipe part 27 and the multiple approaches 27B and the inlet pipe 23 connected is.

To 2 contains the inlet pipe 23 a longitudinal wall part as the end inlet pipe 23B with which the horizontal rib 29 connected is. The longitudinal wall part 23B is curved so that it faces the throttle body 19th protrudes.

As described so far, in the present embodiment, the auxiliary gas supply pipe is 30th , which the make-up gas to the multiple inlet pipes 23 , 24 and 25th individually supplied, integrally at an upper portion of the intake manifold 20th educated.

The additional gas supply pipe 30th contains the inlet-side attachment part 38A , in which the additional gas inlet opening 38 receiving the additional gas is formed, and the branch pipe part 30A , the one with the inlet-side approach 38A and the plurality of inlet pipes 23 , 24 and 25th connected is. The multiple inlet pipes 23 , 24 and 25th contain the end inlet pipe 23 at a location adjacent the throttle body retaining flange 27A towards the Cylinder bank. The multiple inlet pipes 23 , 24 and 25th contain the end inlet pipe 23 at a location adjacent the throttle body retaining flange 27A in the direction of the cylinder bank. The inlet-side attachment part 38A is located above the end inlet pipe 23 and at a location near the throttle body retention flange 27A in a direction crossing the cylinder bank direction around the throttle body support flange 27A or the inlet pipe part 27 and the end inlet pipe 23 over the reinforcement rib 28 connect to.

As the inlet pipe 23 as the end inlet pipe and the high strength inlet side extension part 38A are provided, the rigidity improves. Because the throttle body retaining flange 27A and the end inlet pipe 23 over the reinforcement rib 28 are connected to each other, it is possible to use the throttle body retaining flange 27A to reinforce and improve the rigidity. There is no weight gain even if the inlet-side approach part 38A is provided, and therefore it is possible to increase the weight of the engine 1 to avoid.

As a result, the rigidity around the throttle body retaining flange can be increased 27A the intake manifold 20th improve around without adding the weight of the engine 1 is increased.

In the present embodiment, the branch pipe part includes 30A the first pipe part 31 that extends in a straight line from the inlet-side extension part 38A in the direction of the cylinder bank on the opposite side of the throttle body retaining flange 27A extends the second pipe part 32 extending from the downstream end of the pipe section 31 to the head-side flange 26th extends, and the first branch pipe part 34 and the second branch pipe part 35 , which are on opposite sides in the direction of the cylinder row starting from the upstream end of the second pipe part 32 extend. The first branch pipe part 34 runs in the direction of the cylinder row starting from the downstream end of the second pipe part 32 on the side of the end inlet pipe 23 . The reinforcement rib 28 is located in the zone that is enclosed between the first pipe part 31 and the first branch pipe part 34 in the transverse direction.

This is how the reinforcement rib is located 28 in the zone between the first pipe part 31 and the first branch pipe part 34 is enclosed, whereby it is possible to increase the rigidity of the inlet-side extension part 38A to increase. This in turn enables the stiffness of the throttle body retaining flange to be increased 27A .

In this embodiment, the intake manifold is with the multiple lugs 27B equipped by the peripheral portion of the inlet pipe part 27 on opposite sides of the cylinder head 2 protrude, and is with the horizontal rib 29 equipped with the inlet pipe part 27 and the multiple approaches 27B and the end inlet pipe 23 connected is.

This makes it possible to use multiple approaches 27B in the peripheral area of the inlet pipe part 27 with the inlet pipe 23 than the end inlet pipe via the reinforcement rib 29 to connect to thereby the inlet pipe part 27 through the inlet pipe 23 sure to support. This makes it possible to improve the rigidity of the throttle body retaining flange 27A on the inlet pipe part 27 to increase.

In this embodiment, the end inlet tube contains 23 the longitudinal wall part 23B to which the horizontal rib 23 adjoins, and the longitudinal wall part 23B is curved so that it faces the throttle body 19th protrudes.

So there the longitudinal wall part 23B of the inlet pipe 23 is curved so that it is in the direction of the throttle body 19th protrudes, there is a distance between the longitudinal wall part 23B and the throttle body 19th shorter, which makes it possible for the horizontal rib 29 to shorten and so increase the rigidity of the horizontal rib 29 to increase.

While an embodiment of the invention has been disclosed, it will be apparent to those skilled in the art that modifications can be added without departing from the spirit and scope of the invention. All such modifications and equivalents are covered by the appended claims.

List of reference symbols

1

Engine,

2

Cylinder head,

19th

Throttle body,

20th

Intake manifold,

21

Expansion tank,

23

Inlet pipe (end inlet pipe),

23B

Longitudinal wall part,

24, 25

Inlet pipe,

26th

head end flange,

27

Inlet pipe part,

27A

Throttle body retaining flange,

27B

Approach,

28

Reinforcement rib,

29

horizontal rib,

30th

Additional gas supply pipe,

30A

Branch pipe part,

31

first pipe part,

32

second pipe part,

34

first branch pipe part,

35

second branch pipe part,

38

Additional gas inlet opening,

38A

inlet-side attachment part.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• JP 2008297960 A [0002, 0003]

Claims (4)

An engine intake device comprising an intake manifold (20) that introduces air into an engine (1), the intake manifold (20) including: a surge tank (21) extending toward a bank of cylinders; an inlet pipe part (27) extending upward from one end portion of the surge tank (21) in the direction of the cylinder bank; a throttle body retaining flange (27A) disposed at an upstream end of the inlet pipe portion (27), a throttle body (19) being attached to the throttle body retaining flange (27A); and a plurality of intake pipes (23, 24, 25) branching from a lower part of the surge tank (21) and curved so as to pass above the surge tank (21), downstream ends of the plurality of intake pipes having a cylinder head (2 ) are connected by a head-side flange (26), characterized in that an additional gas supply pipe (20), which individually supplies an additional gas to the plurality of inlet pipes (23, 24, 25), is integrally formed on an upper part of the intake manifold (20) the additional gas supply pipe (30) includes: an inlet-side boss portion (38A) in which an additional gas inlet port (38) is formed which receives the additional gas; and a branch pipe part (30A) connected to the inlet-side boss part (38A) and the plurality of inlet pipes (23, 24, 25) including the plurality of inlet pipes (23, 24, 25) and one end inlet pipe (23) a location adjacent to the throttle body retaining flange (27A) in the direction of the cylinder bank, the inlet-side extension portion (38A) above the end inlet pipe (23) at a location near the throttle body retaining flange (27A) in the direction of the cylinder bank crossing direction, and the throttle body retaining flange (27A) or the inlet pipe part (27) is connected to the end inlet pipe (23) via a reinforcing rib (28). Engine intake device according to Claim 1 wherein the branch pipe part (30A) includes: a first pipe part (31) extending in a straight line from the inlet-side extension part (38A) toward the cylinder bank on an opposite side of the throttle body holding flange (27A); a second pipe part (32) extending from a downstream end of the first pipe part (31) to the head-side flange (26); and a first branch pipe part (34) and a second branch pipe part (35) extending on opposite sides in the direction of the cylinder bank from a downstream end of the second pipe part (32), the first branch pipe part (34) extending in the direction of the cylinder bank extends from the downstream end of the second pipe part (32) toward a side of the end inlet pipe, and the reinforcing rib (28) is located in a zone between the first pipe part (31) and the first branch pipe part (34) in the crossing direction. Engine intake device according to Claim 1 or 2 wherein the intake manifold (20) includes: a plurality of extension parts (27B) which form bosses from a peripheral portion of the intake pipe part (27) on opposite sides of the cylinder head (2); and a horizontal rib (29) connected to the inlet pipe part (27) and the plural extension parts (27B) and the end inlet pipe (23). Engine intake device according to Claim 3 wherein the end inlet pipe (23) includes a longitudinal wall part (23B) to which the horizontal rib (29) is connected, and the longitudinal wall part (23B) is curved so as to protrude toward the throttle body (19).

Images