Catalyst heating device and heating device
US-2019381455-A1 · Dec 19, 2019 · US
Exhaust gas purification system for internal combustion engine
US10871094B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10871094-B2 |
| Application number | US-201916354693-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 15, 2019 |
| Priority date | Mar 22, 2018 |
| Publication date | Dec 22, 2020 |
| Grant date | Dec 22, 2020 |
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- Title
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Abstract
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An object of the disclosure is to prevent the sensing accuracy of an exhaust gas sensor from being deteriorated by the effect of electromagnetic waves in an exhaust gas purification system for an internal combustion engine that is configured to apply electromagnetic waves to the exhaust gas purification device provided in an exhaust passage of the internal combustion engine. The disclosure is applied to an exhaust gas purification system for an internal combustion engine including an exhaust gas sensor located within the range of radiation of electromagnetic waves from a radiating device that radiates electromagnetic waves of a specific frequency to an exhaust gas purification device. The system suspends the radiation of electromagnetic waves from the radiating device during a sampling period in which sampling of the output value of the exhaust gas sensor is performed, even when a specific condition for performing the radiation is met.
First claim
Opening claim text (preview).
What is claimed is: 1. An exhaust gas purification system for an internal combustion engine comprising: an exhaust gas purification device provided in an exhaust passage of the internal combustion engine; a radiation device provided in the exhaust passage and configured to radiate electromagnetic waves of a specific frequency to the exhaust gas purification device; an exhaust gas sensor located within a range of radiation of electromagnetic waves from the radiating device in the exhaust passage; and a controller comprising at least one processor configured to perform radiation of microwaves from the radiating device when a specific condition for performing the radiation is met, wherein the controller suspends the radiation of electromagnetic waves from the radiating device during a sampling period in which sampling of an output value of the exhaust gas sensor is performed, even while the specific condition for performing the radiation is met. 2. The exhaust gas purification system for the internal combustion engine according to claim 1 , wherein the controller stops the radiation of electromagnetic waves from the radiating device before a beginning of the sampling period and restarts the radiation of electromagnetic waves from the radiating device after an end of the sampling period. 3. The exhaust gas purification system for the internal combustion engine according to claim 1 , wherein in cases where sampling of the output value of the exhaust gas sensor is performed repeatedly at a predetermined sampling cycle, the predetermined sampling cycle is set longer when the specific condition for performing the radiation is met than when the specific condition for performing the radiation is not met, while the duration of the sampling period is kept the same. 4. The exhaust gas purification system for the internal combustion engine according to claim 1 , wherein in cases where sampling of the output value of the exhaust gas sensor is performed repeatedly at a predetermined sampling cycle when the condition for performing the radiation is met, the controller suspends the radiation of electromagnetic waves from the radiating device during one sampling period among a predetermined number of sampling periods. 5. The exhaust gas purification system for the internal combustion engine according to claim 1 , wherein the exhaust gas sensor comprises a temperature sensor that measures a temperature of exhaust gas flowing into the exhaust gas purification device or the exhaust gas flowing out of the exhaust gas purification device.
Assignees
Inventors
Classifications
by heating only · CPC title
Improving ICE efficiencies · CPC title
by thermal or catalytic conversion of noxious components of exhaust · CPC title
Exhaust gas temperature · CPC title
- F01N3/202Primary
using microwaves · CPC title
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Frequently asked questions
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- What does patent US10871094B2 cover?
- An object of the disclosure is to prevent the sensing accuracy of an exhaust gas sensor from being deteriorated by the effect of electromagnetic waves in an exhaust gas purification system for an internal combustion engine that is configured to apply electromagnetic waves to the exhaust gas purification device provided in an exhaust passage of the internal combustion engine. The disclosure is a…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification F01N3/202. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Dec 22 2020 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 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).