Blow-by gas heating apparatus

Patent metadata

Field	Value
Publication number	US-10704434-B2
Application number	US-201716305932-A
Country	US
Kind code	B2
Filing date	Aug 31, 2017
Priority date	Sep 2, 2016
Publication date	Jul 7, 2020
Grant date	Jul 7, 2020

Abstract

As a further improvement of the technique of minimizing or preventing excessive cooling of an oil separator, an effective blow-by gas heating apparatus which minimizes or solves the problems due to frozen blow-by gas in an engine externally equipped with an oil separator is provided. The blow-by gas heating apparatus includes: a heat emitting structure abutted onto an oil separator configured to trap and remove oil from blow-by gas. The heat emitting structure has a heat emitting case including inside a passage for engine cooling water. The heat emitting case includes a ceiling wall being in surface-contact from below with a bottom surface of the oil separator.

First claim

The invention claimed is:

1. A blow-by gas heating apparatus comprising a heat emitting structure abutted onto an oil separator configured to trap and remove oil from blow-by gas, wherein the heat emitting structure has a heat emitting case including inside a passage for engine cooling water, and the heat emitting case includes a ceiling wall being in surface-contact from below with a bottom surface of the oil separator, a height of an inner surface of the ceiling wall is configured to increase from a central part toward a peripheral part of the heat emitting case as seen in a vertical direction, and the ceiling wall includes an upper surface conforming to a shape of the bottom surface and closely abuts onto the bottom surface.

2. The blow-by gas heating apparatus according to claim 1 , wherein the height of the inner surface of the ceiling wall is set to be highest at an outlet part for cooling water.

3. The blow-by gas heating apparatus according to claim 2 , wherein
the outlet part has an outlet pipe led below the heat emitting case, and
an upper edge of the outlet pipe is set at a position second highest to a site of the outlet part in the inner surface of the ceiling wall.

4. The blow-by gas heating apparatus according to claim 2 , wherein
the heat emitting case is set to be branched shaped as seen in a vertical direction, with a lateral clearance recess for avoiding a downward-oriented oil outlet of the oil separator, and
at one end and other end of the heat emitting case in a circumferential direction as seen in a vertical direction, a cooling water inlet part and the outlet part are respectively provided.

Assignees

• Kubota Kk

Inventors

• Akita Mitsuhiro
• Sawada Kohei

Classifications

• F01M13/04 Primary

  having means for purifying air before leaving crankcase, e.g. removing oil · CPC title

• F01M13/00

  Crankcase ventilating or breathing · CPC title

• F01M2013/0472

  using heating means · CPC title

• F01M2013/0438

  with a filter · CPC title

• F01M2005/023

  Oil sump with partition for facilitating heating of oil during starting · CPC title