Apparatus and method for estimating stability factor of combustion applicable to vehicular internal combustion engine
US5560336A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 1995 |
| Grant date | Oct 1, 1996 |
| Priority date | — |
| Expiry date | Mar 13, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In an apparatus and method for estimating a stability factor of combustions in a vehicular internal combustion engine, a engine revolution synchronized filter processing is carried out for a signal derived in synchronization with the engine revolutions and, thereafter, a time synchronized filter processing is carried out to extract the frequency component correlated to the engine combustion stability factor. Noise components synchronized with the engine revolutions, based on a revolution speed sensor working accuracy error, and based on tire (road) wheel revolution (rotation) first-order vibration frequency are eliminated. In addition, a resonance frequency component in a vehicular drive train is extracted as a frequency component correlated to the combustion stability factor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.