# US 2017/0284348 A1 · Air intake apparatus

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- Number: US 2017/0284348 A1
- Document ID: US20170284348A1
- Status: Published application
- Kind: A1
- Application number: 15/513,871
- Filed: 2015-09-25
- Published: 2017-10-05
- Earliest claimed: 2014-10-17
- Assignees: Aisin Seiki Kabushiki Kaisha
- Applicants: Aisin Seiki Kabushiki Kaisha
- Inventors: Hideaki TERAMOTO
- Web page: https://patentgrep.com/patent/US20170284348A1

## CPC

- F02M 35/112: for engines with cylinders all in one line
- F02M 35/10052: {special shapes or arrangements of plenum chambers; Constructional details}
- F02M 35/10072: {Intake runners}
- F02M 35/10091: {characterised by details of intake ducts: shapes; connections; arrangements (ducts within or on the plenum chamber F02M35/10039)}
- F02M 35/10222: {Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission}
- F02M 35/104: Intake manifolds
- F02M 35/1045: {characterised by the charge distribution between the cylinders/combustion chambers or its homogenisation}
- F02M 35/1085: {the combustion chamber having multiple intake valves (modifying induction systems for imparting a rotation to the charge in the cylinder and having multiple air inlets F02B31/08; shape or arrangement of intake or exhaust channels in cylinder heads F02F1/42)}
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF

## Abstract

This air intake apparatus is mounted on an in-line multi-cylinder engine, and includes a surge tank that includes a throttle body mounting portion at a central portion thereof, one air intake pipe, which is single, and the other air intake pipe, which is single, connected to one end and the other end of the surge tank in a left-right direction, respectively, a first air intake pipe group that is connected to the one air intake pipe and includes a plurality of branched air intake pipes, and a second air intake pipe group that is connected to the other air intake pipe and includes the same number of branched air intake pipes as the plurality of branched air intake pipes.

## Claims

### Claim 1

An air intake apparatus mounted on an in-line multi-cylinder engine, comprising:
a surge tank that includes a throttle body mounting portion at a central portion thereof;
one air intake pipe, which is single, and the other air intake pipe, which is single, connected to one end and the other end of the surge tank in a left-right direction, respectively;
a first air intake pipe group that is connected to the one air intake pipe and includes a plurality of branched air intake pipes; and
a second air intake pipe group that is connected to the other air intake pipe and includes the same number of branched air intake pipes as the plurality of branched air intake pipes.

### Claim 2 (depends on 1)

The air intake apparatus according to claim 1, wherein
an air intake pipe length from an end of the one air intake pipe closer to the surge tank to a tip end of an individual air intake pipe in the first air intake pipe group is equal to an air intake pipe length from an end of the other air intake pipe closer to the surge tank to a tip end of an individual air intake pipe in the second air intake pipe group.

### Claim 3 (depends on 1)

The air intake apparatus according to claim 1, wherein
the surge tank further includes a convex portion configured such that a portion of an inner bottom surface that corresponds to a position provided with the throttle body mounting portion protrudes inward of the surge tank with respect to inner bottom surfaces of the one end and the other end of the surge tank in the left-right direction.

### Claim 4 (depends on 1)

The air intake apparatus according to claim 1, wherein
portions of the one air intake pipe and the other air intake pipe connected to the surge tank are provided in the vicinity of lowermost portions of the one end and the other end of the surge tank in the left-right direction, respectively.

### Claim 5 (depends on 1)

The air intake apparatus according to claim 1, wherein
an external gas introduction portion that introduces external gas is provided at the central portion of the surge tank, and
an external gas passage that distributes, to left and right sides, the external gas introduced from the external gas introduction portion is provided inside the surge tank.

### Claim 6 (depends on 5)

The air intake apparatus according to claim 5, wherein
an air intake apparatus body including the surge tank is formed by facing and bonding a first member and a second member to each other, and
the external gas passage is formed in a region where a first inner wall surface of the first member that extends toward the second member and a second inner wall surface of the second member that extends toward the first member overlap each other.

### Claim 7 (depends on 3)

The air intake apparatus according to claim 3, wherein
an external gas passage that distributes, to left and right sides, external gas introduced from an external gas introduction portion that introduces the external gas is provided inside the surge tank, and
external gas introduction regions to the surge tank in the external gas passage are arranged at positions spaced apart in the left-right direction from a position in the surge tank that corresponds to a top of the convex portion on the inner bottom surface.