Gas sensor for detecting concentration of specific gas component
US-2016320334-A1 · Nov 3, 2016 · US
Gas sensor apparatus and method for controlling the same
US9052279B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9052279-B2 |
| Application number | US-201213458312-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 27, 2012 |
| Priority date | Apr 28, 2011 |
| Publication date | Jun 9, 2015 |
| Grant date | Jun 9, 2015 |
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Abstract
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When a detection signal obtained from the cell of a gas sensor (S 15 ) has reached a start determination value (specifically, when the output voltage of the cell is higher than 600 mV (S 16 : YES) or lower than 300 mV (S 17 : YES)), a pulse voltage is applied to the cell (S 18 ), and a start-time internal resistance is obtained on the basis of the detection signal having changed as a result of application of the pulse voltage (S 20 ). The start-time internal resistance is compared with a deterioration determination value set in advance (S 21 ). A target resistance of the cell used in temperature control (energization control) for the heater is corrected in accordance with the result of the comparison (S 28 ). Thus, the temperature of the cell can be stably maintained constant irrespective of deterioration of the cell.
First claim
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The invention claimed is: 1. A gas sensor apparatus which includes a gas sensor having at least one cell composed of a solid electrolyte member and a pair of electrodes, the gas sensor outputting a detection signal corresponding to the concentration of a specific gas contained in exhaust gas, and which is applied to an internal combustion engine for which air-fuel-ratio feedback control is performed on the basis of the detection signal, the gas sensor apparatus comprising: obtaini…
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Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
- G01N27/4067Primary
Physics · mapped topic
Mechanical Engineering · mapped topic
- F02D41/1454Primary
Mechanical Engineering · mapped topic
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Frequently asked questions
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- What does patent US9052279B2 cover?
- When a detection signal obtained from the cell of a gas sensor (S 15 ) has reached a start determination value (specifically, when the output voltage of the cell is higher than 600 mV (S 16 : YES) or lower than 300 mV (S 17 : YES)), a pulse voltage is applied to the cell (S 18 ), and a start-time internal resistance is obtained on the basis of the detection signal having changed as a result of …
- Who is the assignee on this patent?
- Kato Tsuyoshi, Mori Kentaro, Kawaguchi Soichi, and 3 more
- What technology area does this patent fall under?
- Primary CPC classification G01N27/4067. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jun 09 2015 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).