Lean-burn engine exhaust air-fuel and temperature management strategy for improved catalyst durability
US7181905B2 · kind B2 · utility
8Cited by
25References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 2, 2003 |
| Grant date | Feb 27, 2007 |
| Priority date | — |
| Expiry date | Sep 12, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/0802
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A system is described for improving engine and vehicle performance by considering the effects of exhaust conditions on catalyst particle growth. Specifically, engine operation is adjusted to reduce operating in such conditions, and a diagnostic routine is described for determining the effects of any operation that can cause such particle growth. Further, routines are described for controlling various vehicle conditions, such as deceleration fuel shut-off, to reduce effects of the particle growth on emission performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.