Valve device of turbocharger

Patent metadata

Field	Value
Publication number	US-9856787-B2
Application number	US-201514955931-A
Country	US
Kind code	B2
Filing date	Dec 1, 2015
Priority date	Jul 22, 2015
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

A valve device of a turbocharger includes: a valve seat disposed on an entrance of a fluid passage divided into at least two branches, and an opening/closing valve coupled to a rotary shaft rotatably disposed adjacent to the valve seat. The valve seat has a contact surface which is flat and a dividing section which extends across the entrance and divides the entrance into two entrance sections. The opening/closing valve closes the entrance of the fluid passage disposed in the valve seat. The bottom surface of the opening/closing valve is in surface contact with the contact surface of the valve seat. The central portion of the opening/closing valve corresponding to the dividing section is spaced apart from the dividing section at a predetermined distance.

First claim

What is claimed is:

1. A valve device of a turbocharger comprising:
a valve seat disposed on an entrance of a fluid passage, the fluid passage being divided into at least two branches, the valve seat including a contact surface machined to be flat and a dividing section extending across the entrance, the dividing section configured to divide the entrance into at least two entrance sections; and
an opening/closing valve coupled to a rotary shaft, the rotary shaft being rotatably disposed adjacent to the valve seat, the opening/closing valve configured to close the entrance of the fluid passage disposed in the valve seat,
wherein the opening/closing valve has a bottom surface and a central portion, the bottom surface being in surface contact with the contact surface of the valve seat,
wherein the central portion of the opening/closing valve corresponding to the dividing section is spaced apart from the dividing section at a predetermined distance, and
wherein a depth to which the dividing section of the valve seat is depressed is greater than a depth to which the central portion of the opening/closing valve is depressed by 50% to 80%.

2. The valve device according to claim 1 , wherein the dividing section of the valve seat is machined to be depressed from the contact surface to a predetermined depth.

3. The valve device according to claim 1 , wherein the central portion of the opening/closing valve is machined to be depressed from the bottom surface to a predetermined depth.

4. The valve device according to claim 1 , wherein a diameter of the dividing section is smaller than an entire diameter of the fluid passage.

5. The valve device according to claim 1 , wherein the central portion of the opening/closing valve has a shape of a circle including a portion of the entrance of the fluid passage and the dividing section.

6. The valve device according to claim 1 , wherein the central portion of the opening/closing valve is machined such that a portion thereof corresponding to the dividing section is depressed, and a diameter of the central portion is shorter than a diameter of the dividing section.

7. The valve device according to claim 6 , wherein the diameter of the central portion of the opening/closing valve is shorter than the diameter of the dividing section of the valve seat by 40% to 70%.

8. The valve device according to claim 6 , wherein the central portion of the opening/closing valve is depressed in a semispherical shape.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp
• Key Yang Prec Co Ltd
• Keyyang Prec Co Ltd

Inventors

• Chu Dong Ho
• Cho Kyu Sik

Classifications

• F01D17/105 Primary

  by passing part of the fluid · CPC title

• F05D2220/40

  in turbochargers · CPC title

• F02B37/225 Primary

  air passages · CPC title

• F02B37/16

  by bypassing charging air · CPC title

• F02B37/025

  Multiple scrolls or multiple gas passages guiding the gas to the pump drive · CPC title