Engine intake air duct

Patent metadata

Field	Value
Publication number	US-10907590-B2
Application number	US-201816233636-A
Country	US
Kind code	B2
Filing date	Dec 27, 2018
Priority date	Dec 28, 2017
Publication date	Feb 2, 2021
Grant date	Feb 2, 2021

Abstract

An engine intake air duct 1 has an intake portion 10 that extends along a first center line A, and a main duct portion 20 that extends along a second center line B. The main duct portion 20 has a merging portion 50 , a discharge opening 21 , and an extending portion 40 that extends from the merging portion 50 towards an opposite end to the discharge opening 20 . A reflecting wall 41 is provided at an end face of the extending portion 40 . The intake portion 10 merges with the main duct portion 20 in such a way that the first center line A is directed towards a downstream end of the main duct portion 20.

First claim

What is claimed is:

1. An engine intake air duct configured to be connected to a vehicle air cleaner, the engine intake air duct comprising:
an intake portion having an intake opening configured to draw in air, the intake portion extending along a first center line of the intake portion;
a merging portion provided at the intake portion;
a main duct portion having a discharge opening configured to discharge the air towards the vehicle air cleaner, the main duct portion extending along a second center line of the main duct portion, such that the main duct portion has a straight portion extending from the merging portion along the second center line; and
an extending portion provided at the merging portion, the extending portion extending from the merging portion towards a location opposite to the straight portion and along a third center line of the extending portion,
wherein a reflecting wall configured to reflect a sound from the vehicle air cleaner is provided at an end face of the extending portion such that the reflecting wall is perpendicular to each of the second center line of the straight portion of the main duct portion and the third center line of the extending portion,
wherein the intake portion merges with the main duct portion in such a way that the first center line of the intake portion is directed towards the straight portion of the main duct portion,
wherein the intake portion is defined by a curved segment such that with respect to a direction of a flow of the air in the straight portion of the main duct portion, a downstream point within the curved segment and on the first center line of the intake portion is always situated farther from the reflecting wall than an upstream point within the curved segment and on the first center line of the intake portion,
wherein a width dimension of an entirety of the extending portion, in an area from the reflecting wall to the merging portion is greater than a width dimension of the straight portion of the main duct portion, and
wherein the third center line of the extending portion is out of alignment with the second center line of the straight portion of the main duct portion such that with respect to a direction of a flow of air through the intake opening of the intake portion, the third center line of the extending portion is located closer to the intake opening than the second center line of the straight portion of the main duct portion a portion.

2. The engine intake air duct according to claim 1 ,
wherein a reinforcement portion that extends in a direction intersecting the second center line of the straight portion of the main duct portion and connects inner facing walls of the main duct portion, is provided in at least one of the merging portion and the extending portion.

3. The engine intake air duct according to claim 2 ,
wherein at least part of the reinforcement portion is provided at a position passing through the third center line of the extending portion or at a position adjacent the second center line of the straight portion of the main duct portion.

4. The engine intake air duct according to claim 1 ,
wherein a projection that projects towards an interior of the intake portion, is provided at a merging side end of a side wall of the intake portion.

5. The engine intake air duct according to claim 4 ,
wherein the projection is a triangular prism extending in a direction intersecting the first center line of the intake portion.

6. The engine intake air duct according to claim 1 ,
wherein at least one flow regulating fin that extends along the first center line of the intake portion, is provided in the intake portion.

7. The engine intake air duct according to claim 6 ,
wherein the at least one flow regulating fin connects inner facing walls of the intake portion.

Assignees

• Inoue Mtp Kk
• Toyota Motor Co Ltd
• Toyota Jidoshokki Kk
• Kk Toyota Jtdoshokkt

Inventors

• Tange Katsuhiro
• Kato Haruki
• Nonoyama Kyosuke
• Hoshikawa Yusuke

Classifications

• F02M35/1277

  Reinforcement of walls, e.g. with ribs or laminates; Walls having air gaps or additional sound damping layers · CPC title

• F02M35/1216

  by using a plurality of holes, slits, protrusions, perforations, ribs or the like; Surface structures; Turbulence generators · CPC title

• F02M35/1211

  by using inserts in the air intake flow path, e.g. baffles, throttles or orifices; Flow guides (F02M35/1244 takes precedence) · CPC title

• F02M35/10131

  Ducts situated in more than one plane; Ducts of one plane crossing ducts of another plane · CPC title

• F02M35/10111

  Substantially V-, C- or U-shaped ducts in direction of the flow path · CPC title