Radio Frequency Process Sensing, Control, and Diagnostics Network and System
US-2017182447-A1 · Jun 29, 2017 · US
Radio frequency system and method for monitoring engine-out exhaust constituents
US10260400B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10260400-B2 |
| Application number | US-201715481670-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 7, 2017 |
| Priority date | Jun 8, 2015 |
| Publication date | Apr 16, 2019 |
| Grant date | Apr 16, 2019 |
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Abstract
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A radio frequency system and method for monitoring an engine-out exhaust emission constituent. The system comprises a housing containing the emission constituent, one or more radio frequency sensors extending into the housing and transmitting and receiving radio frequency signals, and a control unit for controlling the radio frequency signals and monitoring changes in the emission constituent based on changes in one or more parameters of the radio frequency signals. In one embodiment, the control unit measures a rate of change in one or more of the parameters of the radio frequency signals for monitoring a rate of change of the emission constituent including for example the emission rate, accumulation rate, and/or depletion rate of the emission constituent.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for monitoring an emission constituent in a radio frequency system including a housing containing the emission constituent, one or more radio frequency sensors extending into the housing and transmitting and receiving radio frequency signals spanning a radio frequency range; and a control unit, the method comprising the step of controlling the radio frequency signals and monitoring changes in the emission constituent based on changes in one or more parameters of the radio frequency signals, and further comprising the step of sampling one or more of the parameters of the radio frequency signals in one or more predefined narrow radio frequency signal ranges to decrease the measurement response time. 2. The method of claim 1 , further comprising the step of controlling the radio frequency signals and monitoring changes in one emission constituent based on changes in the magnitude or amplitude of the radio frequency signals and/or shifts in the phase of the radio frequency signals in one predefined radio frequency signal range and monitoring changes in another emission constituent based on changes in the magnitude or amplitude of the radio frequency signals and/or shifts in the phase of the radio frequency signals in another predefined radio frequency range. 3. The method of claim 1 , further comprising the step of measuring changes in one or more of the parameters of the radio frequency signals in one or more predefined radio frequency signal ranges corresponding to one or more predefined spatial regions in the housing. 4. The method of claim 3 , wherein the predefined spatial regions correspond to predefined spatial regions sensitive to the parameter of the radio frequency signal being measured. 5. The method of claim 3 , wherein the predefined spatial regions correspond to predefined spatial regions exhibiting a favorable behavior for the parameter of the radio frequency signal being measured. 6. The method of claim 1 , wherein the one or more predefined narrow radio frequency signal ranges correspond to one or more predefined resonant modes of the radio frequency signal. 7. The method of claim 1 , further comprising the step of measuring a rate of change in one or more of the parameters of the radio frequency signals for monitoring a rate of change of the emission constituent. 8. The method of claim 1 , further comprising the step of comparing the rate of change of the emission constituent with expected values of the rate of change of the emission constituent. 9. The method of claim 1 , further comprising the step of monitoring the emission rate, accumulation rate, and/or depletion rate of the emission constituent.
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Classifications
NH3-storage component incorporated in the catalyst · CPC title
- F01N3/2066Primary
Selective catalytic reduction [SCR] · CPC title
Control of selective catalytic reduction [SCR], e.g. by adjusting the dosing of reducing agent · CPC title
Exhaust systems with means for detecting or measuring exhaust gas components or characteristics · CPC title
Other sensor principles, e.g. using electro conductivity of substrate or radio frequency · CPC title
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- What does patent US10260400B2 cover?
- A radio frequency system and method for monitoring an engine-out exhaust emission constituent. The system comprises a housing containing the emission constituent, one or more radio frequency sensors extending into the housing and transmitting and receiving radio frequency signals, and a control unit for controlling the radio frequency signals and monitoring changes in the emission constituent b…
- Who is the assignee on this patent?
- Cts Corp
- What technology area does this patent fall under?
- Primary CPC classification F01N3/2066. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Apr 16 2019 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).