Method for determining the energy of a knock signal for an internal combustion engine
US7263872B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2004 |
| Grant date | Sep 4, 2007 |
| Priority date | — |
| Expiry date | Apr 30, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02P5/152
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a method for determining the energy (KNKE) of the knock of an internal combustion engine, using an analog signal supplied by a sensor fixed to the engine. The inventive method includes the following steps: a) the analog signal is shaped, b) the analog signal is converted into a sequence of digital samples, c) the signal is subjected to digital filtering, and d) the signal is adjusted and e) integrated. According to the method: i) the shaping of the analog signal includes combining the signal with a continuous component (Vcnf) adapted to render the shaped signal a positive signal or a zero signal, and ii) the digital filtering is carried out by a band-pass filter with an infinite impulse response, the transfer function thereof including a zero for the zero frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.