Estimation of engine-out NOx for real time input to exhaust aftertreatment controller
US7779680B2 · kind B2 · utility
29Cited by
2References
15Claims
0Family size
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Key dates
| Filing date | May 12, 2008 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Apr 15, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/0047
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method and system for estimating engine-out NOx from a diesel engine. The estimation is calculated from a mathematical model that expresses engine-out NOx as functions of cylinder pressure, intake oxygen, and effective temperature, respectively. Input data for each of these functions may be obtained from fuel quantity data and from measured data, the latter including intake pressure, cylinder pressure, intake oxygen concentration, coolant temperature, and intake manifold temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.