Control apparatus for internal combustion engine
US-2015377164-A1 · Dec 31, 2015 · US
Revolution increase-decrease determination device and revolution increase-decrease determination method
US8935120B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8935120-B2 |
| Application number | US-201113164103-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 20, 2011 |
| Priority date | Feb 8, 2010 |
| Publication date | Jan 13, 2015 |
| Grant date | Jan 13, 2015 |
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Abstract
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An acceleration-deceleration determination device includes: a DFT analysis unit which calculate, from an engine sound, a frequency signal at a predetermined frequency for each of predetermined time periods; and an acceleration-deceleration determination unit which determines whether the number of engine revolutions is increasing or decreasing, by determining whether a phase of the frequency signal is increasing at an accelerating rate over time or decreasing at an accelerating rate over time.
First claim
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What is claimed is: 1. A revolution increase-decrease determination device comprising: a frequency analysis unit configured to calculate, from an engine sound, a frequency signal at a predetermined frequency for each of predetermined time periods; a revolution determination unit configured to determine whether the number of engine revolutions is increasing or decreasing, by determining whether a phase of the frequency signal is increasing at an accelerating rate over time or dec…
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Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
- F02D41/045Primary
Mechanical Engineering · mapped topic
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- What does patent US8935120B2 cover?
- An acceleration-deceleration determination device includes: a DFT analysis unit which calculate, from an engine sound, a frequency signal at a predetermined frequency for each of predetermined time periods; and an acceleration-deceleration determination unit which determines whether the number of engine revolutions is increasing or decreasing, by determining whether a phase of the frequency sig…
- Who is the assignee on this patent?
- Yoshioka Mototaka, Yoshizawa Shinichi, Panasonic Corp
- What technology area does this patent fall under?
- Primary CPC classification F02D41/045. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jan 13 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).