Exhaust gas heat exchanger

Patent metadata

Field	Value
Publication number	US-9103250-B2
Application number	US-201214352177-A
Country	US
Kind code	B2
Filing date	Oct 17, 2012
Priority date	Oct 18, 2011
Publication date	Aug 11, 2015
Grant date	Aug 11, 2015

Abstract

An exhaust gas heat exchanger includes a tube through which exhaust gas flows, a fin disposed in the tube, and protruded tabs protruded from the tube or the fin. Each of the protruded tabs is inclined to an upstream side, and has a polygonal shape more than a quadrilateral shape having at least a bottom side, one lateral side and another lateral side. An angle of the one lateral side to the bottom side is set smaller than 90 degrees and than an angle of the other lateral side to the bottom side. The bottom side is placed to intersect with a perpendicular direction to the exhaust gas flow direction, and the other lateral side is located upstream from the one lateral side. According to the exhaust gas heat exchanger, it is possible to improve heat exchange efficiency by generating a swirl flow for facilitating heat transfer effectively.

First claim

The invention claimed is:

1. An exhaust gas heat exchanger for exchanging heat between exhaust gas and cooling fluid of an internal combustion engine, comprising:
a tube forming an exhaust gas flow path through which the exhaust gas flows;
a fin disposed in the exhaust gas flow path; and
a plurality of protruded tabs protruded from at least one of the tube and the fin to inhibit an exhaust gas flow, wherein
each of the plurality of protruded tabs has a polygonal shape with a…

Assignees

• Calsonic Kansei Corp

Inventors

• Iwasaki Mitsuru

Classifications

• F01N2470/12

  Mechanical Engineering · mapped topic

• F02M25/0737

  Mechanical Engineering · mapped topic

• F01N2240/02

  Mechanical Engineering · mapped topic

• F01N3/043

  Mechanical Engineering · mapped topic

• F02B29/0462

  Mechanical Engineering · mapped topic