Method for condition determination of an exhaust-gas purification system
US-9540984-B2 · Jan 10, 2017 · US
Method for detecting the degree of aging of catalytic converters
US10036298B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10036298-B2 |
| Application number | US-201515311277-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 8, 2015 |
| Priority date | May 16, 2014 |
| Publication date | Jul 31, 2018 |
| Grant date | Jul 31, 2018 |
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- Title
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Abstract
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The invention is directed to a method for determining the state of aging of a catalytic converter ( 2 ). The disclosed method functions in a non-contacting manner as resonances formed when the catalytic converter ( 2 ) located in a housing is excited with high-frequency electromagnetic waves are analyzed.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for noninvasive detection of a degree of aging of an automotive exhaust gas converter via emission of an alternating electromagnetic field within a microwave range and detecting the same, wherein the automotive exhaust gas converter is located in a metallic catalytic converter housing and provided with an exhaust gas mixture containing water during measurement, and wherein adsorption of water on a catalyst surface is determined using certain microwave resonance characteristics at a catalyst temperature of <200° C., and the degree of aging of the catalytic converter is thereby inferred. 2. The method according to claim 1 , wherein a catalyst temperature of >50° C. is used. 3. The method according to claim 1 , wherein the exhaust gas mixture contains 3-20% by volume water. 4. The method according to claim 1 , wherein the microwave resonance characteristics are selected from the group consisting of resonance frequency, amplitude, quality of a resonator (Q), losses, parameters of a scatter matrix S ij , and quantities based thereupon (also at different frequency ranges). 5. The method according to claim 1 , wherein an antenna located in the metallic catalytic converter housing is used to transmit and/or receive the alternating electromagnetic field.
Assignees
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Classifications
Moisture amount in exhaust apparatus · CPC title
having more than one sensor of one kind · CPC title
Other sensor principles, e.g. using electro conductivity of substrate or radio frequency · CPC title
for measuring or detecting humidity or water · CPC title
Catalytic activity of catalytic converters · CPC title
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US10036298B2 cover?
- The invention is directed to a method for determining the state of aging of a catalytic converter ( 2 ). The disclosed method functions in a non-contacting manner as resonances formed when the catalytic converter ( 2 ) located in a housing is excited with high-frequency electromagnetic waves are analyzed.
- Who is the assignee on this patent?
- Umicore Ag & Co Kg
- What technology area does this patent fall under?
- Primary CPC classification F01N11/00. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jul 31 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).