Diagnostic systems and methods for engine knock sensors
US7769536B2 · kind B2 · utility
7Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2009 |
| Grant date | Aug 3, 2010 |
| Priority date | — |
| Expiry date | Feb 24, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An engine control system includes a digital signal processing (DSP) module that generates a fast Fourier transform (FFT) of an engine knock signal generated by an engine knock sensor. An intensity determination module determines an engine knock intensity based on one of a maximum of and an average of the FFT. A status determination module determines a status of the engine knock sensor based on the engine knock intensity, a plurality of predetermined knock intensity thresholds, and a rotational speed of an engine crankshaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.