Recirculation valve

Patent metadata

Field	Value
Publication number	US-10619600-B2
Application number	US-201816163966-A
Country	US
Kind code	B2
Filing date	Oct 18, 2018
Priority date	Dec 18, 2017
Publication date	Apr 14, 2020
Grant date	Apr 14, 2020

Abstract

A recirculation valve of an exhaust gas recirculation apparatus includes: a valve housing having a gas inlet into which a recirculation gas flows, a gas outlet from which the recirculation gas is discharged, and an intermediate inlet disposed between the gas inlet and the gas outlet; and a valve body selectively opening and closing the gas inlet and the intermediate inlet.

First claim

What is claimed is:

1. A recirculation valve of an exhaust gas recirculation apparatus, comprising:
a valve housing having a gas inlet into which a recirculation gas flows, a gas outlet from which the recirculation gas is discharged, and an intermediate inlet disposed between the gas inlet and the gas outlet; and
a valve body selectively opening and closing the gas inlet and the intermediate inlet,
wherein the valve body selectively opens and closes the gas inlet or the intermediate inlet while moving between the gas inlet and the intermediate inlet,
wherein the valve body includes:
an upper portion selectively opening and closing the intermediate inlet; and
a lower portion selectively opening and closing the gas inlet,

wherein, when the valve body is maximally opened at a maximum open position, a shortest distance between the upper portion of the valve body and the intermediate inlet is equal to or longer than a shortest distance between the lower portion of the valve body and the gas inlet, and
wherein, when the valve body is maximally opened at the maximum open position, a distance between an intermediate portion, at which the upper portion of the valve body and the lower portion of the valve body directly contact each other, and the intermediate inlet is longer than a distance between the intermediate portion and the gas inlet.

2. The recirculation valve of claim 1 , wherein the upper portion of the valve body has a conical, hemispherical, or polyhedral shape, the intermediate inlet has a shape corresponding to the upper portion of the valve body, and
wherein the lower portion of the valve body has a conical, hemispherical, or polyhedral shape, and the gas inlet has a shape corresponding to the lower portion of the valve body.

3. The recirculation valve of claim 2 , wherein an upper tilt angle of the upper portion of the valve body is greater than a lower tilt angle of the lower portion of the valve body.

4. The recirculation valve of claim 1 , wherein the maximum open position is a position at which a flow rate of the gas discharged to the gas outlet through the intermediate inlet from the gas inlet is maximized as the valve body moves between the gas inlet and the intermediate inlet.

5. The recirculation valve of claim 4 , wherein, in a normal operation, a flow rate of the recirculation gas is adjusted while the valve body moves between the maximum open position and a normal blocking position at which the upper portion of the valve body contacts the intermediate inlet.

6. The recirculation valve of claim 5 , wherein, in the normal operation, the upper portion of the valve body blocks the intermediate inlet to block inflow of the recirculation gas.

7. The recirculation valve of claim 5 , wherein, in an abnormal operation, the lower portion of the valve body blocks the gas inlet to block inflow of the recirculation gas.

8. The recirculation valve of claim 1 , wherein a distance between the gas inlet and the intermediate inlet is longer than a distance from a position at which the upper portion of the valve body contacts the intermediate inlet to a position at which the lower portion of the valve body contacts the gas inlet.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Choi Choo Saeng

Classifications

• F02M26/73

  with means for heating or cooling the EGR valve · CPC title

• F02M26/21

  with EGR valves located at or near the connection to the intake system · CPC title

• F02M2026/004

  EGR valve controlled by a temperature signal or an air/fuel ratio (lambda) signal · CPC title

• F02M26/16 Primary

  with EGR valves located at or near the connection to the exhaust system · CPC title

• Y02T10/12

  Improving ICE efficiencies · CPC title