System and method for alerting and suppression of detonation and/or pre ignition phenomena in internal combustion engines by monitoring RPM fluctuation
US-9464589-B2 · Oct 11, 2016 · US
Method for detecting a misfire condition in an internal combustion engine
US9031815B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9031815-B2 |
| Application number | US-201213572865-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 13, 2012 |
| Priority date | Aug 12, 2011 |
| Publication date | May 12, 2015 |
| Grant date | May 12, 2015 |
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Abstract
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A method detects a “misfire” condition in an internal-combustion engine including a control unit, a driving shaft and phonic wheel that is splined to the shaft and coupled to a sensor. The method comprises steps of: detecting intensity of a signal generated by passage of teeth of the wheel by the sensor, sampling the signal generated by the passage of the teeth, processing the sampled signal by applying a discrete Fourier transform, representing the sampled signal processed by a virtual phasor that represents in a vector form the signal that has been sampled and processed, determining a corresponding theoretical phasor for the virtual phasor that represents theoretical evolution of the signal that has been sampled and processed over time, comparing the theoretical phasor with the virtual phasor, and determining presence of a “misfire” condition by comparing the theoretical phasor with the virtual phasor that represents the signal that has been sampled and processed.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for detecting a misfire condition in an internal-combustion engine that includes a control unit, a driving shaft and phonic wheel that is splined to the driving shaft and coupled to a sensor, the method comprising steps of: detecting intensity of a signal generated by passage of teeth of the phonic wheel by the sensor; sampling the signal generated by the passage of the teeth; processing the sampled signal by applying a discrete Fourier transfor…
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Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
- G01M15/11Primary
Physics · mapped topic
Physics · mapped topic
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- What does patent US9031815B2 cover?
- A method detects a “misfire” condition in an internal-combustion engine including a control unit, a driving shaft and phonic wheel that is splined to the shaft and coupled to a sensor. The method comprises steps of: detecting intensity of a signal generated by passage of teeth of the wheel by the sensor, sampling the signal generated by the passage of the teeth, processing the sampled signal by…
- Who is the assignee on this patent?
- Caterini Canio Rocco, Alunni Francesco, De Luca Luigi, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification G01M15/11. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue May 12 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).