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Abnormality detection device for exhaust gas recirculation apparatus
US9212628B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9212628-B2 |
| Application number | US-201113505163-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 24, 2011 |
| Priority date | Oct 25, 2010 |
| Publication date | Dec 15, 2015 |
| Grant date | Dec 15, 2015 |
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Abstract
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An abnormality detection device for an exhaust gas recirculation apparatus is provided that can perform abnormality detection with respect to an EGR valve while suppressing the influence of a size relationship between an intake pressure and an exhaust pressure. An ECU (Electronic Control Unit) executes processing for extracting a pulse from an intake pipe pressure value. The ECU executes arithmetic processing for performing Fast Fourier Transform (FFT) with respect to an output waveform of an intake pressure sensor obtained by sampling processing, and also executes extraction processing that extracts a “frequency component corresponding to a period of an exhaust pulse”. The ECU executes processing that determines, in steps, whether or not the size of the extracted pulse (amplitude size) exceeds a threshold value. If the amplitude size exceeds the threshold value, the ECU executes processing that determines that a totally closed abnormality is occurring in the EGR valve.
First claim
Opening claim text (preview).
The invention claimed is: 1. An abnormality detection device for an exhaust gas recirculation apparatus that is an abnormality detection device that detects an abnormality in an exhaust gas recirculation apparatus that comprises, in an internal combustion engine having a plurality of cylinders: an EGR passage that, among a first exhaust passage communicating with some cylinders of the plurality of cylinders and a second exhaust passage communicating with other cylinders of the plu…
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Cross-Sectional Technologies · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
- F02M25/0702Primary
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
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Frequently asked questions
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- What does patent US9212628B2 cover?
- An abnormality detection device for an exhaust gas recirculation apparatus is provided that can perform abnormality detection with respect to an EGR valve while suppressing the influence of a size relationship between an intake pressure and an exhaust pressure. An ECU (Electronic Control Unit) executes processing for extracting a pulse from an intake pipe pressure value. The ECU executes arithm…
- Who is the assignee on this patent?
- Miyashita Shigeki, Sadakane Shinji, Inoue Masahiro, and 3 more
- What technology area does this patent fall under?
- Primary CPC classification F02M25/0702. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Dec 15 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).