Emission control strategy for lean idle
US7467511B2 · kind B2 · utility
1Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 20, 2005 |
| Grant date | Dec 23, 2008 |
| Priority date | — |
| Expiry date | Jul 6, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/0404
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An engine control system that regulates fuel to an engine after lean idle operation includes a first module that determines a rich mass fuel rate based on a lean operation mass air flow and a stoichiometric air to fuel ratio (AFR) and that calculates a time rich based on the rich mass fuel rate. A second module regulates fuel to the engine during a rich operation period after the lean idle operation to provide the rich mass fuel rate for the time rich.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.