Method for the diagnosis of the EGR cooler efficiency in a diesel engine
US8386204B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2010 |
| Grant date | Feb 26, 2013 |
| Priority date | — |
| Expiry date | Jan 11, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M26/33
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method is provided for the diagnosis of the EGR cooler efficiency in a Diesel engine that includes but is not limited to construction of a model for determining the temperature drop y=ΔT in the EGR cooler, the model having a parameter vector θ and an input vector x; performing a model calibration phase in order to estimate the bias h0 of the system; calculation of a set of primary residuals ε(θ0, x, ΔT), staffing from the model equation and using the results of the calibration phase; calculation of a set of improved residuals εN(θ0):where N is the number of samples on which the diagnostic test is performed; calculation of a diagnostic index S:S=εTNR0−1εN and, use of the diagnostic index S in order to diagnose the efficiency of the EGR cooler.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.