Method for detecting pre-ignition of internal combustion engine
US10809155B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2018 |
| Grant date | Oct 20, 2020 |
| Priority date | — |
| Expiry date | Nov 1, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M15/05
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a method for detecting the pre-ignition of an internal combustion engine comprising: integrating all instantaneous angular accelerations in a feature window to acquire integral values, and judging whether the internal combustion engine is pre-ignited according to the integral values and an pre-ignition threshold in a detection window; the feature window is an angle range corresponding to a top dead center of the compression stroke of the internal combustion engine to 3-5 consecutive signal teeth backward from the top dead center along the rotating direction of a crankshaft; the instantaneous angular accelerations correspond to the signal teeth in the feature window in a one-to-one manner. The method for detecting the pre-ignition of the present application is simple in algorithm and small in amount of calculation, only 3-5 pieces of data in the feature window are required to be numerically integrated, and the abnormal combustion is determined without complicated time-frequency analysis and vibration information reconstruction cylinder pressure; the structure of the internal combustion engine may not need to be modified and the marketization period is short;…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.