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Title: Method and apparatus for thermal management of vehicle exhaust systems

Abstract

A catalytic converter is surrounded by variable conductance insulation for maintaining the operating temperature of the catalytic converter at an optimum level, for inhibiting heat loss when raising catalytic converter temperature to light-off temperature, for storing excess heat to maintain or accelerate reaching light-off temperature, and for conducting excess heat away from the catalytic converter after reaching light-off temperature. The variable conductance insulation includes vacuum gas control and metal-to-metal thermal shunt mechanisms. Radial and axial shielding inhibits radiation and convection heat loss. Thermal storage media includes phase change material, and heat exchanger chambers and fluids carry heat to and from the catalytic converter.

Inventors:
 [1];  [2]
  1. Golden, CO
  2. Denver, CO
Issue Date:
Research Org.:
Midwest Research Institute, Kansas City, MO (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
870218
Patent Number(s):
5477676
Assignee:
Midwest Research Institute (Kansas City, MO)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
F - MECHANICAL ENGINEERING F28 - HEAT EXCHANGE IN GENERAL F28F - DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
DOE Contract Number:  
AC02-83CH10093
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; apparatus; thermal; management; vehicle; exhaust; systems; catalytic; converter; surrounded; variable; conductance; insulation; maintaining; operating; temperature; optimum; level; inhibiting; heat; loss; raising; light-off; storing; excess; maintain; accelerate; reaching; conducting; vacuum; gas; control; metal-to-metal; shunt; mechanisms; radial; axial; shielding; inhibits; radiation; convection; storage; media; phase; change; material; exchanger; chambers; fluids; carry; thermal management; catalytic converter; metal thermal; heat loss; change material; phase change; heat exchange; heat exchanger; operating temperature; thermal storage; excess heat; storage media; gas control; convection heat; carry heat; optimum level; /60/165/

Citation Formats

Benson, David K, and Potter, Thomas F. Method and apparatus for thermal management of vehicle exhaust systems. United States: N. p., 1995. Web.
Benson, David K, & Potter, Thomas F. Method and apparatus for thermal management of vehicle exhaust systems. United States.
Benson, David K, and Potter, Thomas F. Sun . "Method and apparatus for thermal management of vehicle exhaust systems". United States. https://www.osti.gov/servlets/purl/870218.
@article{osti_870218,
title = {Method and apparatus for thermal management of vehicle exhaust systems},
author = {Benson, David K and Potter, Thomas F},
abstractNote = {A catalytic converter is surrounded by variable conductance insulation for maintaining the operating temperature of the catalytic converter at an optimum level, for inhibiting heat loss when raising catalytic converter temperature to light-off temperature, for storing excess heat to maintain or accelerate reaching light-off temperature, and for conducting excess heat away from the catalytic converter after reaching light-off temperature. The variable conductance insulation includes vacuum gas control and metal-to-metal thermal shunt mechanisms. Radial and axial shielding inhibits radiation and convection heat loss. Thermal storage media includes phase change material, and heat exchanger chambers and fluids carry heat to and from the catalytic converter.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {1}
}

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Works referenced in this record:

Use of Light-Off Catalysts to Meet the California LEV/ULEV Standards
conference, March 1993