Air intake apparatus of internal-combustion engine and air intake flow control valve

Patent metadata

Field	Value
Publication number	US-10830157-B2
Application number	US-201916507119-A
Country	US
Kind code	B2
Filing date	Jul 10, 2019
Priority date	Jul 19, 2018
Publication date	Nov 10, 2020
Grant date	Nov 10, 2020

Abstract

An air intake apparatus of an internal-combustion engine includes: an air intake passage communicating with a combustion chamber; an air intake flow control valve including a rotation shaft provided in the air intake passage and a valve body having a convex arc-shaped outer peripheral surface and opening and closing a main opening portion of the air intake passage, and controlling the intake air when the main opening portion is closed; a valve body storage portion provided in the air intake passage to have a concave arc shape corresponding to the valve body and storing the valve body when the main opening portion is opened; and a sub-opening portion provided between the outer peripheral surface and an inner surface of the valve body storage portion, allowing a portion of the intake air to pass therethrough and discharging the portion toward the intake air when the main opening portion is closed.

First claim

What is claimed is:

1. An air intake apparatus of an internal-combustion engine, comprising:
an air intake passage which communicates with a combustion chamber of the internal-combustion engine and supplies an intake air to the combustion chamber;
an air intake flow control valve including a rotation shaft which is provided in the air intake passage and a valve body which has a convex arc-shaped outer peripheral surface and opens and closes a main opening portion of the air intake passage by pivoting around an axial line of the rotation shaft, the air intake flow control valve controlling a flow of the intake air by pivoting the valve body when the main opening portion is closed;
a valve body storage portion which is provided in the air intake passage to have a concave arc shape corresponding to a shape of the outer peripheral surface of the valve body and which stores the valve body when the main opening portion is opened by virtue of movement of the valve body relative to the valve body storage portion; and
a sub-opening portion which is provided between the outer peripheral surface of the valve body and an inner surface of the valve body storage portion, allows a portion of the intake air to pass therethrough and discharges the portion of the intake air toward the intake air which passes through the main opening portion when the main opening portion is closed.

2. The air intake apparatus of the internal-combustion engine according to claim 1 ,
wherein the sub-opening portion is formed by a groove portion which is provided in at least one of the valve body storage portion and the valve body and extends along a flow direction of the intake air which flows through the sub-opening portion.

3. The air intake apparatus of the internal-combustion engine according to claim 1 ,
wherein a passage cross-sectional area of the sub-opening portion fluctuates in accordance with pivoting of the air intake flow control valve.

4. The air intake apparatus of the internal-combustion engine according to claim 1 ,
wherein the inner surface of the valve body storage portion includes a flat surface portion which is provided at an end portion on a downstream side in the flow direction of the intake air and controls the flow direction of the intake air which passes through the sub-opening portion to be a predetermined direction.

5. The air intake apparatus of the internal-combustion engine according to claim 4 ,
wherein a cross-section of a passage of the sub-opening portion is formed in a rectangular shape having a long edge which extends in an axial direction of the rotation shaft and a short edge which extends in a direction orthogonal to the long edge and a length of the flat surface portion in the flow direction of the intake air is greater than or equal to a length of the short edge at a most downstream portion of the sub-opening portion.

6. The air intake apparatus of the internal-combustion engine according to claim 1 ,
wherein the valve body includes a sealing portion which is provided on an end portion on a downstream side of the outer peripheral surface and comes into contact with the inner surface of the valve body storage portion to seal the sub-opening portion when the main opening portion is opened.

7. The air intake apparatus of the internal-combustion engine according to claim 1 ,
wherein the sub-opening portion is formed by a groove portion which is provided in each of the valve body storage portion and the valve body.

8. The air intake apparatus of the internal-combustion engine according to claim 1 ,
wherein an inner surface which is positioned most downstream of an air intake port of the internal-combustion engine and is on a downstream side in a flow direction of the intake air which flows through the sub-opening portion is curved to face a top side inside the combustion chamber.

9. An air intake flow control valve comprising:
a rotation shaft which is provided in an air intake passage; and
a valve body which has a convex arc-shaped outer peripheral surface and opens and closes a main opening portion of the air intake passage by pivoting around an axial line of the rotation shaft,
wherein the air intake flow control valve is configured to control a flow of the intake air by pivoting the valve body when the main opening portion is closed and to allow a sub-opening portion which is provided between an outer peripheral surface of the valve body and an inner surface of a valve body storage portion, which is provided in the air intake passage to have a concave arc shape corresponding to a shape of the outer peripheral surface of the valve body and which stores the valve body when the main opening portion is opened by virtue of movement of the valve body relative to the valve body storage portion, to pass a portion of the intake air therethrough to discharge the portion of the intake air toward the intake air which passes through the main opening portion when the main opening portion is closed.

Assignees

• Aisin Seiki

Inventors

• Ito Atsushi

Classifications

• F02D9/1025

  the rotation axis of the flap being off-set from the flap center axis · CPC title

• F02D9/1015 Primary

  Details of the edge of the flap, e.g. for lowering flow noise or improving flow sealing in closed flap position · CPC title

• F02M35/104

  Intake manifolds · CPC title