Oil separator

Patent metadata

Field	Value
Publication number	US-2016333755-A1
Application number	US-201415110606-A
Country	US
Kind code	A1
Filing date	Dec 24, 2014
Priority date	Jan 27, 2014
Publication date	Nov 17, 2016
Grant date	—

Abstract

An oil separator is configured in which oil collecting performance is maintained at a high level even when negative pressure acts on a blow-by gas circulation portion. An oil discharge port for discharging oil collected from oil mist downward is formed in a bottom portion of the blow-by gas circulation portion, in which blow-by gas flows. A concave portion, which suppresses a phenomenon in which an air current spreads along a wall portion when that air current flows upward from the oil discharge port due to the action of negative pressure, is formed in a wall portion that opposes the oil discharge port.

First claim

1 . (canceled)

2 . (canceled)

3 . (canceled)

4 . (canceled)

5 . (canceled)

6 . (canceled)

7 . An oil separator comprising:
an oil discharge port that is provided in a bottom portion of a blow-by gas circulation portion in which blow-by gas of an internal combustion engine flows, and that discharges oil collected from oil mist contained in the blow-by gas downward from the bottom portion; and a concave portion formed in a wall portion of the blow-by gas circulation portion that opposes the oil discharge port, so as to immobilize an air current returning from the oil discharge port to the blow-by gas circulation portion, wherein the concave portion is arranged in a region that surrounds the oil discharge port in a plan view.

8 . The oil separator according to claim 7 , wherein the concave portion is constituted by a tube-shaped body that projects from the wall portion toward the oil discharge port.

9 . The oil separator according to claim 8 , wherein an oil inducing protrusion portion that projects downward in a tapered shape from an opening edge of the tube-shaped body is formed.

10 . The oil separator according to claim 7 , wherein the concave portion is constituted by rib-shaped wall bodies that project from the wall portion into the blow-by gas circulation portion and extend between side wall portions connected to the wall portion at positions that sandwich the oil discharge port in a plan view.

11 . The oil separator according to claim 7 , wherein the concave portion is constituted by a groove-shaped portion that recedes in a concave manner from the wall portion and extends between side wall portions connected to the wall portion at a position above the oil discharge port in a plan view.

12 . The oil separator according to claim 8 , wherein an absorbent material that can absorb oil is provided in an inner portion of the tube-shaped body.

13 . The oil separator according to claim 9 , wherein an absorbent material that can absorb oil is provided in an inner portion of the tube-shaped body.

Assignees

• Aisin Seiki

Inventors

• Kira Naoki

Classifications

• F01M13/022

  using engine inlet suction · CPC title

• F01M2013/0438

  with a filter · CPC title

• B01D46/0036

  by adsorption or absorption · CPC title

• B01D46/0031

  with collecting, draining means · CPC title

• F01M13/0416 Primary

  arranged in valve-covers · CPC title