Method for real time determination of the mass of particles in a particle filter of a motor vehicle
US7319928B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2004 |
| Grant date | Jan 15, 2008 |
| Priority date | — |
| Expiry date | Dec 15, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method for real-time determination of the mass of particles in a particle filter fitted to the exhaust line of an internal combustion engine. The following data—temperature T(t) of the exhaust gas at the filter input, oxygen [O2 (t)] and nitrogen oxide [NOx(t)] concentration of the exhaust gases entering the filter—is used to calculate the rate of combustion of the particles in the particle filter with the aid of kinetic laws of chemical reactions of particle combustion. The rate, the rate emission of particles from the engine F(t), and the mass of particles in the filter mc(t−Δ,.t) obtained during the cycle of operations prior to the moment t−Δt, is then used to calculate the mass of particles in the filter, mc(t):=mc(t−Δt)+[F(t) V(t)]*Δt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.