Systems and methods for detecting exhaust air leak
US-2019063284-A1 · Feb 28, 2019 · US
Emission control device for internal combustion engine
US10655525B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10655525-B2 |
| Application number | US-201816149465-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 2, 2018 |
| Priority date | Oct 6, 2017 |
| Publication date | May 19, 2020 |
| Grant date | May 19, 2020 |
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- Title
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Abstract
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An emission control device for an internal combustion engine is configured to perform a particulate matter trap function of trapping, with a particulate filter, particulate matter contained in exhaust gas which flows in an exhaust passage of the internal combustion engine. The emission control device includes a controller. The controller is configured to calculate a particulate matter accumulation amount, which is a total amount of particulate matter trapped by the particulate filter based on an operation condition of the internal combustion engine. The controller is configured to stop calculating the particulate matter accumulation amount when the particulate matter trap function is not functioning.
First claim
Opening claim text (preview).
The invention claimed is: 1. An emission control device for an internal combustion engine, the emission control device configured to perform a particulate matter trap function of trapping, with a particulate filter, particulate matter contained in exhaust gas which flows in an exhaust passage of the internal combustion engine, the emission control device comprising: a controller; and a pressure sensor configured to detect upstream pressure in an exhaust gas flow of a position in the exhaust passage where the particulate filter is designed to be provided, wherein the controller is configured to calculate a particulate matter accumulation amount, which is a total amount of particulate matter trapped by the particulate filter based on an operation condition of the internal combustion engine, and determine that the particulate filter is uninstalled in the emission control device and stop calculating the particulate matter accumulation amount when the upstream pressure calculated based on an output signal from the pressure sensor is less than upstream pressure that is estimated based on an assumption that the particulate filter is provided. 2. An emission control device for an internal combustion engine, the emission control device configured to perform a particulate matter trap function of trapping, with a particulate filter, particulate matter contained in exhaust gas which flows in an exhaust passage of the internal combustion engine, the emission control device comprising: a controller; and a pressure sensor configured to detect upstream pressure in an exhaust gas flow of a position in the exhaust passage where the particulate filter is designed to be provided, wherein the controller is configured to calculate a particulate matter accumulation amount, which is a total amount of particulate matter trapped by the particulate filter based on an output signal from the pressure sensor, the particulate matter accumulation amount calculated based on an operation condition of the internal combustion engine is defined as a first accumulation amount, the particulate matter accumulation amount calculated based on the output signal from the pressure sensor is defined as a second accumulation amount, and the emission control device is configured to determine that the particulate filter is uninstalled in the emission control device when a subtraction value obtained by subtracting the second accumulation amount from the first accumulation amount is greater than or equal to a predetermined value.
Assignees
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Classifications
Exhaust gas treatment apparatus parameters · CPC title
Exhaust gas pressure · CPC title
Introducing closed-loop corrections · CPC title
- F01N9/002Primary
of filter regeneration · CPC title
Particle filter loading or soot amount · CPC title
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- What does patent US10655525B2 cover?
- An emission control device for an internal combustion engine is configured to perform a particulate matter trap function of trapping, with a particulate filter, particulate matter contained in exhaust gas which flows in an exhaust passage of the internal combustion engine. The emission control device includes a controller. The controller is configured to calculate a particulate matter accumulat…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification F01N9/002. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue May 19 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).