Heat storage device

Patent metadata

Field	Value
Publication number	US-9316135-B2
Application number	US-201314401313-A
Country	US
Kind code	B2
Filing date	May 16, 2013
Priority date	May 18, 2012
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

Abstract

A heat storage device includes a reactor, arranged in an exhaust system, having a formed body chemically reacting with ammonia and generating heat, and an ammonia reservoir, connected to the reactor, for storing ammonia. The ammonia reservoir incorporates therein an absorbent physically absorbing ammonia. The ammonia reservoir has a heat-exchanging structure and is temperature controlled by heat exchange with an external heating medium.

First claim

The invention claimed is:

1. A heat storage device for heating a catalyst arranged in an exhaust system of an internal-combustion engine of a vehicle, the heat storage device comprising:
a reactor, arranged in the exhaust system, having a formed body chemically reacting with ammonia and generating heat; and
an ammonia reservoir, connected to the reactor, for storing the ammonia;
wherein the ammonia reservoir incorporates therein an absorbent physically absorbing the ammonia; and
wherein the ammonia reservoir has a heat-exchanging structure and is temperature controlled by heat exchange with an air.

2. The heat storage device according to claim 1 , wherein the ammonia reservoir is arranged in one of a front part of a body, an engine room, and a rear cargo room in the vehicle.

3. The heat storage device according to claim 2 , wherein the ammonia reservoir is arranged adjacent to and on the downstream side of a fan arranged in the engine room.

4. The heat storage device according to claim 1 , wherein the ammonia reservoir is arranged adjacent to an outlet portion for compressed air used for an air brake device of the vehicle.

5. The heat storage device according to claim 2 , wherein the ammonia reservoir is arranged adjacent to and on the downstream side of a fan arranged in the rear cargo room.

Assignees

• Toyota Jidoshokki Kk

Inventors

• Hariu Satoshi
• Yamasaki Takafumi
• Kubo Hidehito

Classifications

• F28F3/02

  Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations (F28F3/08 takes precedence) · CPC title

• Y02T10/26

  Cross-Sectional Technologies · mapped topic

• Y02E60/142

  Cross-Sectional Technologies · mapped topic

• F01N2610/1406

  Storage means for substances, e.g. tanks or reservoirs · CPC title

• F01N3/2006 Primary

  Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating (by electrically controlling the supply of combustible mixture or its constituents only F02D41/0235) · CPC title