Oil jet abnormality determination apparatus of internal combustion engine and control apparatus of internal combustion engine
US-2015377115-A1 · Dec 31, 2015 · US
Knock control device for engine
US8965666B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8965666-B2 |
| Application number | US-201113238113-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 21, 2011 |
| Priority date | Jan 31, 2011 |
| Publication date | Feb 24, 2015 |
| Grant date | Feb 24, 2015 |
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Abstract
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A knock control device is provided in which erroneous knock detection can be reduced by suppressing sudden knock signal changes due to noise, without causing any increase in the number of matching steps, deterioration in the S/N in knock detection and decrease in detection performing frequency. In the knock control device, an open gain is applied to the detected signal only during a knock detection window set in advance by a knock window setting means. The window corresponds to a period in which vibration due to knock arises. During other periods, either a closed gain or an interpolated gain value is applied to the detected signal.
First claim
Opening claim text (preview).
What is claimed is: 1. A knock control device for an engine, comprising: a knock sensor that detects vibration due to knock of the engine; a digital signal processing unit that performs a time-frequency analysis based on output from the knock sensor during a digital signal processing period set in advance; a knock window setting unit that calculates as a knock signal a peak-hold value in a knock window set in advance with respect to the processing result by the digital signal…
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Mechanical Engineering · mapped topic
- F02P5/152Primary
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Cross-Sectional Technologies · mapped topic
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- What does patent US8965666B2 cover?
- A knock control device is provided in which erroneous knock detection can be reduced by suppressing sudden knock signal changes due to noise, without causing any increase in the number of matching steps, deterioration in the S/N in knock detection and decrease in detection performing frequency. In the knock control device, an open gain is applied to the detected signal only during a knock detec…
- Who is the assignee on this patent?
- Matsushima Yuhei, Ezumi Keitaro, Kusunoki Tomokuni, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification F02P5/152. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Feb 24 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).