Method of efficiently determining pressure-based combustion parameters for an IC engine
US7440841B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 12, 2007 |
| Grant date | Oct 21, 2008 |
| Priority date | — |
| Expiry date | Feb 14, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2250/14
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Pressure-based combustion parameters of an IC engine are determined based on engine cylinder pressure measurements and crank angle dependent cylinder volume data, where the pressure in a given engine cylinder is periodically sampled at scheduled crank angles to provide a measurement resolution that varies over the combustion cycle for that cylinder, and the cylinder volume data is retrieved from a table of pre-calculated data. The combustion parameter calculations are customized to suit the variable resolution pressure data, and the crank angles used to retrieve the pre-calculated cylinder volume data are offset from the scheduled crank angles to compensate for misalignment of the pressure measurements relative to the scheduled engine crank angles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.