Methods for monitoring and diagnosing the efficiency of catalytic converters: a patent-oriented survey

471 Pages·1998·8.917 MB·English

by  M. Sideris

studies in surface science and catalysis
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METHODS FOR MONITORING AND
DIAGNOSING THE EFFICIENCY OF
CATALYTIC CONVERTERS
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A Patent oriented Survey
Marios Sideris
This is Volume 14 of the EPO Applied Technology Series. The following
books have appeared previously in this series:
Volume 1 CARDON & FRANSEN Dynamic Semiconductor
RAM Structures
Volume 2 LAMMINEUR & CORNILLIE Industrial Robots
Volume 3 BRACKE et al Inorganic Fibres & Composite
Materials
Volume 4 HOORNAERT Reverse Osmosis
Volume 5 GEISLER et al Optical Fibres
Volume 6 JACOBS et al Nickel &Cobalt Extraction
Using Organic Compounds
Volume 7 CRISTOL Solid State Video Cameras
Volume 8 CORNlLLlE & DAVIES Microprocessors
Volume 9 MlCHlELS & DE HERDT Molecular Sieve Catalysts
Volume 10 DERAEDT Methods of Abating
Residual Formaldehyde in
Industrial Resins
Volume 11 DHEERE Universal Computer
Interfaces
Volume 12 HERMANN Protein Folding
Volume 13 ONSHAGE Mercury Cadmium
Te II u ride Im age rs

Studies in Surface Science and Catalysis 115
METHODS FOR MONITORING AND
DIAGNOSING THE EFFICIENCY OF
CATALYTIC CONVERTERS
A Patent-orientedS urvey

Studies in Surface Science and Catalysis
Advisory Editors: B. Delmon and J.T. Yates
Vol. 115
METHODS FOR MONITORING AND
DIAGNOSING THE EFFICIENCY OF
CATALYTIC CONVERTERS
A Patent-oriented Survey
Marios Sideris
European Patent Office, Rijswijk, The Netherlands
1998
ELSEVIER
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0 1998 Elsevier Science B.V. All rights reserved.
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Printed in The Netherlands
Methods for Monitoriw and Diamosiw the Efficiencv of Catalvtic
Converters
Summary
The evolution of methods concerned with on-board (OBD) and non-OBD monitoring and
diagnosing of efficiency of catalytic converters of internal combustion engines is described
based on patents and published patent applications. Non-patent references are also used.
The basic principles of modem catalytic converters are described in an extensive Introduction,
where the importance of monitoring and diagnosing the efficiency of catalytic converters is
demonstrated.
The book is divided into four parts. The first part describes methods involving the use of
oxygen or airhel ratio exhaust gas sensors to determine the oxygen storage capacity of a
catalytic converter. The second part describes methods involving the use of temperature
sensors to determine the exothermic reaction capacity of a catalytic converter. The third part
describes all other methods existing in patent literature that monitor and diagnose the efficiency
of catalytic converters. The great majority of the methods of the third part involves exhaust gas
concentration measurements. The fourth part comprises a general discussion of all methods
described.
In the beginning of each part, a short introduction is given to explain the problem that the
methods attempt to solve. The methods in each part are presented in chronological order per
patent applicant. This helps to evaluate how the patent applicant has improved his methods
over time.
A patent number index with information about the patent applicants, inventors, priorities and
patent-families, an inventor index, a company index and a subject index can be found at the end
ofthe book.