Abnormal combustion detection method for internal-combustion engines from combustion indicator distribution modelling
US8499623B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 2010 |
| Grant date | Aug 6, 2013 |
| Priority date | — |
| Expiry date | Feb 3, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/402
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An abnormal combustion detection method for spark-ignition internal-combustion engines, from combustion indicator distribution modelling is disclosed. At least one combustion indicator such as CA10 is determined. The distribution of N values of this indicator, acquired over N cycles preceding the cycle in progress, is modelled by determining coefficients of a theoretical distribution law. Modelling is repeated by removing extreme values from among the N values or for various working points of the engine, to obtain an evolution of the coefficients. At least one parameter characterizing evolution of at least one of these coefficients is determined. The start of an abnormal combustion is detected by comparing the parameter with a predetermined threshold, and the course of the abnormal combustion detected in the combustion chamber is controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.