Approach for engine control and diagnostics
US9175625B2 · kind B2 · utility
12Cited by
2References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2014 |
| Grant date | Nov 3, 2015 |
| Priority date | — |
| Expiry date | Feb 14, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/0816
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Embodiments for an engine exhaust are provided. In one example, a method comprises adjusting a fuel injection amount based on a fractional oxidation state of a catalyst, the fractional oxidation state based on reaction rates of a plurality of exhaust gas species throughout a catalyst longitudinal axis and a set of axially-averaged mass balance and energy balance equations for a fluid phase and a washcoat of the catalyst, and further based on feedback from a downstream air-fuel ratio sensor. In this way, a simplified catalyst model may be used to control air-fuel ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.