Exhaust gas heat exchanger capable of controlling cooling performance

Patent metadata

Field	Value
Publication number	US-10865674-B2
Application number	US-201716466744-A
Country	US
Kind code	B2
Filing date	Sep 26, 2017
Priority date	Dec 19, 2016
Publication date	Dec 15, 2020
Grant date	Dec 15, 2020

Abstract

The present invention relates to an exhaust gas heat exchanger capable of controlling the cooling performance. The exhaust gas heat exchanger includes: a cooler through which cooling water flows and in which a plurality of gas tubes is provided to allow exhaust gas to flow; an intake and exhaust block including an intake part, a supply line, a discharge line, a bypass line, and a first flap; a U-turn block including an inflow part, a re-cooling line, a release line, and a second flap; and an air duct.

First claim

The invention claimed is:

1. An exhaust gas heat exchanger comprising:
a cooler through which cooling water flows and in which a plurality of gas tubes is provided to allow exhaust gas to flow;
an intake and exhaust block including an intake part to which an exhaust gas pipe for supplying exhaust gas is connected, a supply line for communicating first ends of some of the plurality of gas tubes with the intake part, a discharge line for communicating first ends of the remaining tubes of the plurality of gas tubes with outside, a bypass line for bypassing exhaust gas entering from the intake part to the outside, and a first flap for blocking selectively any one line of the supply line and the bypass line;
a U-turn block including an inflow part into which exhaust gas discharged through second ends of some of the plurality of gas tubes flows, a re-cooling line for communicating second ends of the remaining tubes of the plurality of gas tubes with the inflow part, a release line for discharging exhaust gas entering from the inflow part to the outside, and a second flap for blocking selectively any one line of the re-cooling line and the release line; and
an air duct for guiding exhaust gas to the discharge line, the exhaust gas being discharged through the release line,
wherein, a supply partition having a supply hole is provided in the supply line, a bypass partition having a bypass hole is provided in the bypass line, the first flap is rotatably mounted on the intake and exhaust block and is operated to cover the supply hole or the bypass hole depending on a rotational angle thereof, a re-cooling partition having a re-cooling hole is provided in the re-cooling line, a release partition having a release hole is provided in the release line, the second flap is rotatably mounted on the U-turn block and is operated to cover the re-cooling hole or the release hole depending on a rotational angle thereof, and outlets of the discharge line and the bypass line are integrally formed into a single pipe that is divided by a discharge partition.

2. The exhaust gas heat exchanger of claim 1 , wherein number of the gas tubes connected to an outlet of the re-cooling line is larger than number of the gas tubes connected to an outlet of the supply line.

Assignees

• Korens Co Ltd
• Bayerische Motoren Werke Ag

Inventors

• Cho Hyung Geun

Classifications

• F01N3/043

  without contact between liquid and exhaust gases · CPC title

• F02D9/04

  concerning exhaust conduits (throttle valves, or arrangements thereof in conduits F02D9/08) · CPC title

• F01N3/0205 Primary

  using heat exchangers · CPC title

• F02M26/28

  with liquid-cooled heat exchangers · CPC title

• F02M26/25 Primary

  with coolers having bypasses · CPC title