Method of estimating the instantaneous engine speed produced by each cylinder of an internal-combustion engine
US8024166B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2006 |
| Grant date | Sep 20, 2011 |
| Priority date | — |
| Expiry date | May 16, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/1004
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention is a method for real-time estimation of the instantaneous engine speed produced by each cylinder of an internal-combustion engine, from an instantaneous engine speed measurement at the end of the engine transmission system. A physical model, representing in real time the dynamics of the transmission system according to the crankshaft angle and to coefficients of a Fourier series decomposition of the instantaneous speed produced by each cylinder, is constructed. These coefficients are determined in real time from coupling between the model and an adaptive type non-linear estimator. The instantaneous speed produced by each cylinder is then deduced from these coefficients. The mean torque produced by each cylinder can also be deduced therefrom. An application is: engine controls.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.